[104106] | 1 | /*
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| 2 | * nanohttp.c: minimalist HTTP GET implementation to fetch external subsets.
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| 3 | * focuses on size, streamability, reentrancy and portability
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| 4 | *
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| 5 | * This is clearly not a general purpose HTTP implementation
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| 6 | * If you look for one, check:
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| 7 | * http://www.w3.org/Library/
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| 8 | *
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| 9 | * See Copyright for the status of this software.
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| 10 | *
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| 11 | * daniel@veillard.com
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| 12 | */
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| 13 |
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| 14 | #define IN_LIBXML
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| 15 | #include "libxml.h"
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| 16 |
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| 17 | #ifdef LIBXML_HTTP_ENABLED
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| 18 | #include <string.h>
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| 19 | #include <ctype.h>
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| 20 | #include <stdlib.h>
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| 21 | #include <errno.h>
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| 22 |
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| 23 | #ifdef HAVE_UNISTD_H
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| 24 | #include <unistd.h>
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| 25 | #elif defined (_WIN32)
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| 26 | #include <io.h>
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| 27 | #endif
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| 28 | #ifdef HAVE_SYS_SOCKET_H
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| 29 | #include <sys/socket.h>
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| 30 | #endif
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| 31 | #ifdef HAVE_NETINET_IN_H
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| 32 | #include <netinet/in.h>
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| 33 | #endif
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| 34 | #ifdef HAVE_ARPA_INET_H
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| 35 | #include <arpa/inet.h>
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| 36 | #endif
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| 37 | #ifdef HAVE_NETDB_H
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| 38 | #include <netdb.h>
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| 39 | #endif
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| 40 | #ifdef HAVE_FCNTL_H
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| 41 | #include <fcntl.h>
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| 42 | #endif
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| 43 | #ifdef HAVE_SYS_TIME_H
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| 44 | #include <sys/time.h>
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| 45 | #endif
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| 46 | #ifndef HAVE_POLL_H
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| 47 | #ifdef HAVE_SYS_SELECT_H
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| 48 | #include <sys/select.h>
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| 49 | #endif
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| 50 | #else
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| 51 | #include <poll.h>
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| 52 | #endif
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| 53 | #ifdef LIBXML_ZLIB_ENABLED
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| 54 | #include <zlib.h>
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| 55 | #endif
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| 56 |
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| 57 |
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| 58 | #ifdef VMS
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| 59 | #include <stropts>
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| 60 | #define XML_SOCKLEN_T unsigned int
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| 61 | #endif
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| 62 |
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| 63 | #if defined(_WIN32)
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| 64 | #include <wsockcompat.h>
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| 65 | #endif
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| 66 |
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| 67 | #include <libxml/xmlerror.h>
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| 68 | #include <libxml/xmlmemory.h>
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| 69 | #include <libxml/parser.h> /* for xmlStr(n)casecmp() */
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| 70 | #include <libxml/nanohttp.h>
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| 71 | #include <libxml/uri.h>
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| 72 |
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| 73 | #include "private/error.h"
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| 74 | #include "private/io.h"
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| 75 |
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| 76 | /**
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| 77 | * A couple portability macros
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| 78 | */
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| 79 | #ifndef _WINSOCKAPI_
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| 80 | #define closesocket(s) close(s)
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| 81 | #define SOCKET int
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| 82 | #define INVALID_SOCKET (-1)
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| 83 | #endif
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| 84 |
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| 85 | #ifndef XML_SOCKLEN_T
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| 86 | #define XML_SOCKLEN_T unsigned int
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| 87 | #endif
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| 88 |
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| 89 | #define GETHOSTBYNAME_ARG_CAST (char *)
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| 90 | #define SEND_ARG2_CAST (char *)
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| 91 |
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| 92 | #ifdef STANDALONE
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| 93 | #define xmlStrncasecmp(a, b, n) strncasecmp((char *)a, (char *)b, n)
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| 94 | #define xmlStrcasecmpi(a, b) strcasecmp((char *)a, (char *)b)
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| 95 | #endif
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| 96 |
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| 97 | #define XML_NANO_HTTP_MAX_REDIR 10
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| 98 |
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| 99 | #define XML_NANO_HTTP_CHUNK 4096
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| 100 |
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| 101 | #define XML_NANO_HTTP_CLOSED 0
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| 102 | #define XML_NANO_HTTP_WRITE 1
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| 103 | #define XML_NANO_HTTP_READ 2
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| 104 | #define XML_NANO_HTTP_NONE 4
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| 105 |
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| 106 | typedef struct xmlNanoHTTPCtxt {
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| 107 | char *protocol; /* the protocol name */
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| 108 | char *hostname; /* the host name */
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| 109 | int port; /* the port */
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| 110 | char *path; /* the path within the URL */
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| 111 | char *query; /* the query string */
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| 112 | SOCKET fd; /* the file descriptor for the socket */
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| 113 | int state; /* WRITE / READ / CLOSED */
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| 114 | char *out; /* buffer sent (zero terminated) */
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| 115 | char *outptr; /* index within the buffer sent */
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| 116 | char *in; /* the receiving buffer */
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| 117 | char *content; /* the start of the content */
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| 118 | char *inptr; /* the next byte to read from network */
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| 119 | char *inrptr; /* the next byte to give back to the client */
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| 120 | int inlen; /* len of the input buffer */
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| 121 | int last; /* return code for last operation */
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| 122 | int returnValue; /* the protocol return value */
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| 123 | int version; /* the protocol version */
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| 124 | int ContentLength; /* specified content length from HTTP header */
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| 125 | char *contentType; /* the MIME type for the input */
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| 126 | char *location; /* the new URL in case of redirect */
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| 127 | char *authHeader; /* contents of {WWW,Proxy}-Authenticate header */
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| 128 | char *encoding; /* encoding extracted from the contentType */
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| 129 | char *mimeType; /* Mime-Type extracted from the contentType */
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| 130 | #ifdef LIBXML_ZLIB_ENABLED
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| 131 | z_stream *strm; /* Zlib stream object */
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| 132 | int usesGzip; /* "Content-Encoding: gzip" was detected */
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| 133 | #endif
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| 134 | } xmlNanoHTTPCtxt, *xmlNanoHTTPCtxtPtr;
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| 135 |
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| 136 | static int initialized = 0;
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| 137 | static char *proxy = NULL; /* the proxy name if any */
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| 138 | static int proxyPort; /* the proxy port if any */
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| 139 | static unsigned int timeout = 60;/* the select() timeout in seconds */
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| 140 |
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| 141 | static int xmlNanoHTTPFetchContent( void * ctx, char ** ptr, int * len );
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| 142 |
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| 143 | /**
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| 144 | * xmlHTTPErrMemory:
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| 145 | * @extra: extra information
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| 146 | *
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| 147 | * Handle an out of memory condition
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| 148 | */
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| 149 | static void
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| 150 | xmlHTTPErrMemory(const char *extra)
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| 151 | {
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| 152 | __xmlSimpleError(XML_FROM_HTTP, XML_ERR_NO_MEMORY, NULL, NULL, extra);
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| 153 | }
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| 154 |
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| 155 | /**
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| 156 | * A portability function
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| 157 | */
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| 158 | static int socket_errno(void) {
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| 159 | #ifdef _WINSOCKAPI_
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| 160 | int err = WSAGetLastError();
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| 161 | switch(err) {
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| 162 | case WSAECONNRESET:
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| 163 | return(ECONNRESET);
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| 164 | case WSAEINPROGRESS:
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| 165 | return(EINPROGRESS);
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| 166 | case WSAEINTR:
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| 167 | return(EINTR);
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| 168 | case WSAESHUTDOWN:
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| 169 | return(ESHUTDOWN);
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| 170 | case WSAEWOULDBLOCK:
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| 171 | return(EWOULDBLOCK);
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| 172 | default:
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| 173 | return(err);
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| 174 | }
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| 175 | #else
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| 176 | return(errno);
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| 177 | #endif
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| 178 | }
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| 179 |
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| 180 | /**
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| 181 | * xmlNanoHTTPInit:
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| 182 | *
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| 183 | * Initialize the HTTP protocol layer.
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| 184 | * Currently it just checks for proxy information
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| 185 | */
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| 186 |
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| 187 | void
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| 188 | xmlNanoHTTPInit(void) {
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| 189 | const char *env;
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| 190 | #ifdef _WINSOCKAPI_
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| 191 | WSADATA wsaData;
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| 192 | #endif
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| 193 |
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| 194 | if (initialized)
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| 195 | return;
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| 196 |
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| 197 | #ifdef _WINSOCKAPI_
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| 198 | if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0)
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| 199 | return;
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| 200 | #endif
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| 201 |
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| 202 | if (proxy == NULL) {
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| 203 | proxyPort = 80;
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| 204 | env = getenv("no_proxy");
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| 205 | if (env && ((env[0] == '*') && (env[1] == 0)))
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| 206 | goto done;
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| 207 | env = getenv("http_proxy");
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| 208 | if (env != NULL) {
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| 209 | xmlNanoHTTPScanProxy(env);
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| 210 | goto done;
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| 211 | }
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| 212 | env = getenv("HTTP_PROXY");
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| 213 | if (env != NULL) {
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| 214 | xmlNanoHTTPScanProxy(env);
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| 215 | goto done;
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| 216 | }
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| 217 | }
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| 218 | done:
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| 219 | initialized = 1;
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| 220 | }
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| 221 |
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| 222 | /**
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| 223 | * xmlNanoHTTPCleanup:
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| 224 | *
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| 225 | * Cleanup the HTTP protocol layer.
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| 226 | */
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| 227 |
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| 228 | void
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| 229 | xmlNanoHTTPCleanup(void) {
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| 230 | if (proxy != NULL) {
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| 231 | xmlFree(proxy);
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| 232 | proxy = NULL;
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| 233 | }
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| 234 | #ifdef _WINSOCKAPI_
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| 235 | if (initialized)
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| 236 | WSACleanup();
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| 237 | #endif
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| 238 | initialized = 0;
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| 239 | return;
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| 240 | }
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| 241 |
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| 242 | /**
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| 243 | * xmlNanoHTTPScanURL:
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| 244 | * @ctxt: an HTTP context
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| 245 | * @URL: The URL used to initialize the context
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| 246 | *
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| 247 | * (Re)Initialize an HTTP context by parsing the URL and finding
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| 248 | * the protocol host port and path it indicates.
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| 249 | */
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| 250 |
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| 251 | static void
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| 252 | xmlNanoHTTPScanURL(xmlNanoHTTPCtxtPtr ctxt, const char *URL) {
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| 253 | xmlURIPtr uri;
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| 254 | int len;
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| 255 |
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| 256 | /*
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| 257 | * Clear any existing data from the context
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| 258 | */
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| 259 | if (ctxt->protocol != NULL) {
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| 260 | xmlFree(ctxt->protocol);
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| 261 | ctxt->protocol = NULL;
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| 262 | }
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| 263 | if (ctxt->hostname != NULL) {
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| 264 | xmlFree(ctxt->hostname);
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| 265 | ctxt->hostname = NULL;
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| 266 | }
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| 267 | if (ctxt->path != NULL) {
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| 268 | xmlFree(ctxt->path);
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| 269 | ctxt->path = NULL;
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| 270 | }
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| 271 | if (ctxt->query != NULL) {
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| 272 | xmlFree(ctxt->query);
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| 273 | ctxt->query = NULL;
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| 274 | }
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| 275 | if (URL == NULL) return;
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| 276 |
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| 277 | uri = xmlParseURIRaw(URL, 1);
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| 278 | if (uri == NULL)
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| 279 | return;
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| 280 |
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| 281 | if ((uri->scheme == NULL) || (uri->server == NULL)) {
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| 282 | xmlFreeURI(uri);
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| 283 | return;
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| 284 | }
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| 285 |
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| 286 | ctxt->protocol = xmlMemStrdup(uri->scheme);
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| 287 | /* special case of IPv6 addresses, the [] need to be removed */
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| 288 | if ((uri->server != NULL) && (*uri->server == '[')) {
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| 289 | len = strlen(uri->server);
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| 290 | if ((len > 2) && (uri->server[len - 1] == ']')) {
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| 291 | ctxt->hostname = (char *) xmlCharStrndup(uri->server + 1, len -2);
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| 292 | } else
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| 293 | ctxt->hostname = xmlMemStrdup(uri->server);
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| 294 | } else
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| 295 | ctxt->hostname = xmlMemStrdup(uri->server);
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| 296 | if (uri->path != NULL)
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| 297 | ctxt->path = xmlMemStrdup(uri->path);
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| 298 | else
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| 299 | ctxt->path = xmlMemStrdup("/");
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| 300 | if (uri->query != NULL)
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| 301 | ctxt->query = xmlMemStrdup(uri->query);
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| 302 | if (uri->port != 0)
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| 303 | ctxt->port = uri->port;
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| 304 |
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| 305 | xmlFreeURI(uri);
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| 306 | }
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| 307 |
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| 308 | /**
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| 309 | * xmlNanoHTTPScanProxy:
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| 310 | * @URL: The proxy URL used to initialize the proxy context
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| 311 | *
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| 312 | * (Re)Initialize the HTTP Proxy context by parsing the URL and finding
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| 313 | * the protocol host port it indicates.
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| 314 | * Should be like http://myproxy/ or http://myproxy:3128/
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| 315 | * A NULL URL cleans up proxy information.
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| 316 | */
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| 317 |
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| 318 | void
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| 319 | xmlNanoHTTPScanProxy(const char *URL) {
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| 320 | xmlURIPtr uri;
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| 321 |
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| 322 | if (proxy != NULL) {
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| 323 | xmlFree(proxy);
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| 324 | proxy = NULL;
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| 325 | }
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| 326 | proxyPort = 0;
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| 327 |
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| 328 | if (URL == NULL) return;
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| 329 |
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| 330 | uri = xmlParseURIRaw(URL, 1);
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| 331 | if ((uri == NULL) || (uri->scheme == NULL) ||
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| 332 | (strcmp(uri->scheme, "http")) || (uri->server == NULL)) {
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| 333 | __xmlIOErr(XML_FROM_HTTP, XML_HTTP_URL_SYNTAX, "Syntax Error\n");
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| 334 | if (uri != NULL)
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| 335 | xmlFreeURI(uri);
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| 336 | return;
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| 337 | }
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| 338 |
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| 339 | proxy = xmlMemStrdup(uri->server);
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| 340 | if (uri->port != 0)
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| 341 | proxyPort = uri->port;
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| 342 |
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| 343 | xmlFreeURI(uri);
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| 344 | }
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| 345 |
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| 346 | /**
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| 347 | * xmlNanoHTTPNewCtxt:
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| 348 | * @URL: The URL used to initialize the context
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| 349 | *
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| 350 | * Allocate and initialize a new HTTP context.
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| 351 | *
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| 352 | * Returns an HTTP context or NULL in case of error.
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| 353 | */
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| 354 |
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| 355 | static xmlNanoHTTPCtxtPtr
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| 356 | xmlNanoHTTPNewCtxt(const char *URL) {
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| 357 | xmlNanoHTTPCtxtPtr ret;
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| 358 |
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| 359 | ret = (xmlNanoHTTPCtxtPtr) xmlMalloc(sizeof(xmlNanoHTTPCtxt));
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| 360 | if (ret == NULL) {
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| 361 | xmlHTTPErrMemory("allocating context");
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| 362 | return(NULL);
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| 363 | }
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| 364 |
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| 365 | memset(ret, 0, sizeof(xmlNanoHTTPCtxt));
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| 366 | ret->port = 80;
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| 367 | ret->returnValue = 0;
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| 368 | ret->fd = INVALID_SOCKET;
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| 369 | ret->ContentLength = -1;
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| 370 |
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| 371 | xmlNanoHTTPScanURL(ret, URL);
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| 372 |
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| 373 | return(ret);
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| 374 | }
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| 375 |
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| 376 | /**
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| 377 | * xmlNanoHTTPFreeCtxt:
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| 378 | * @ctxt: an HTTP context
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| 379 | *
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| 380 | * Frees the context after closing the connection.
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| 381 | */
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| 382 |
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| 383 | static void
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| 384 | xmlNanoHTTPFreeCtxt(xmlNanoHTTPCtxtPtr ctxt) {
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| 385 | if (ctxt == NULL) return;
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| 386 | if (ctxt->hostname != NULL) xmlFree(ctxt->hostname);
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| 387 | if (ctxt->protocol != NULL) xmlFree(ctxt->protocol);
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| 388 | if (ctxt->path != NULL) xmlFree(ctxt->path);
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| 389 | if (ctxt->query != NULL) xmlFree(ctxt->query);
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| 390 | if (ctxt->out != NULL) xmlFree(ctxt->out);
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| 391 | if (ctxt->in != NULL) xmlFree(ctxt->in);
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| 392 | if (ctxt->contentType != NULL) xmlFree(ctxt->contentType);
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| 393 | if (ctxt->encoding != NULL) xmlFree(ctxt->encoding);
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| 394 | if (ctxt->mimeType != NULL) xmlFree(ctxt->mimeType);
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| 395 | if (ctxt->location != NULL) xmlFree(ctxt->location);
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| 396 | if (ctxt->authHeader != NULL) xmlFree(ctxt->authHeader);
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| 397 | #ifdef LIBXML_ZLIB_ENABLED
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| 398 | if (ctxt->strm != NULL) {
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| 399 | inflateEnd(ctxt->strm);
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| 400 | xmlFree(ctxt->strm);
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| 401 | }
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| 402 | #endif
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| 403 |
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| 404 | ctxt->state = XML_NANO_HTTP_NONE;
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| 405 | if (ctxt->fd != INVALID_SOCKET) closesocket(ctxt->fd);
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| 406 | ctxt->fd = INVALID_SOCKET;
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| 407 | xmlFree(ctxt);
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| 408 | }
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| 409 |
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| 410 | /**
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| 411 | * xmlNanoHTTPSend:
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| 412 | * @ctxt: an HTTP context
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| 413 | *
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| 414 | * Send the input needed to initiate the processing on the server side
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| 415 | * Returns number of bytes sent or -1 on error.
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| 416 | */
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| 417 |
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| 418 | static int
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| 419 | xmlNanoHTTPSend(xmlNanoHTTPCtxtPtr ctxt, const char *xmt_ptr, int outlen)
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| 420 | {
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| 421 | int total_sent = 0;
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| 422 | #ifdef HAVE_POLL_H
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| 423 | struct pollfd p;
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| 424 | #else
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| 425 | struct timeval tv;
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| 426 | fd_set wfd;
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| 427 | #endif
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| 428 |
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| 429 | if ((ctxt->state & XML_NANO_HTTP_WRITE) && (xmt_ptr != NULL)) {
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| 430 | while (total_sent < outlen) {
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| 431 | int nsent = send(ctxt->fd, SEND_ARG2_CAST (xmt_ptr + total_sent),
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| 432 | outlen - total_sent, 0);
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| 433 |
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| 434 | if (nsent > 0)
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| 435 | total_sent += nsent;
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| 436 | else if ((nsent == -1) &&
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| 437 | #if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
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| 438 | (socket_errno() != EAGAIN) &&
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| 439 | #endif
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| 440 | (socket_errno() != EWOULDBLOCK)) {
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| 441 | __xmlIOErr(XML_FROM_HTTP, 0, "send failed\n");
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| 442 | if (total_sent == 0)
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| 443 | total_sent = -1;
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| 444 | break;
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| 445 | } else {
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| 446 | /*
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| 447 | * No data sent
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| 448 | * Since non-blocking sockets are used, wait for
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| 449 | * socket to be writable or default timeout prior
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| 450 | * to retrying.
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| 451 | */
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| 452 | #ifndef HAVE_POLL_H
|
---|
| 453 | #ifndef _WINSOCKAPI_
|
---|
| 454 | if (ctxt->fd > FD_SETSIZE)
|
---|
| 455 | return -1;
|
---|
| 456 | #endif
|
---|
| 457 |
|
---|
| 458 | tv.tv_sec = timeout;
|
---|
| 459 | tv.tv_usec = 0;
|
---|
| 460 | FD_ZERO(&wfd);
|
---|
| 461 | #ifdef _MSC_VER
|
---|
| 462 | #pragma warning(push)
|
---|
| 463 | #pragma warning(disable: 4018)
|
---|
| 464 | #endif
|
---|
| 465 | FD_SET(ctxt->fd, &wfd);
|
---|
| 466 | #ifdef _MSC_VER
|
---|
| 467 | #pragma warning(pop)
|
---|
| 468 | #endif
|
---|
| 469 | (void) select(ctxt->fd + 1, NULL, &wfd, NULL, &tv);
|
---|
| 470 | #else
|
---|
| 471 | p.fd = ctxt->fd;
|
---|
| 472 | p.events = POLLOUT;
|
---|
| 473 | (void) poll(&p, 1, timeout * 1000);
|
---|
| 474 | #endif /* !HAVE_POLL_H */
|
---|
| 475 | }
|
---|
| 476 | }
|
---|
| 477 | }
|
---|
| 478 |
|
---|
| 479 | return total_sent;
|
---|
| 480 | }
|
---|
| 481 |
|
---|
| 482 | /**
|
---|
| 483 | * xmlNanoHTTPRecv:
|
---|
| 484 | * @ctxt: an HTTP context
|
---|
| 485 | *
|
---|
| 486 | * Read information coming from the HTTP connection.
|
---|
| 487 | * This is a blocking call (but it blocks in select(), not read()).
|
---|
| 488 | *
|
---|
| 489 | * Returns the number of byte read or -1 in case of error.
|
---|
| 490 | */
|
---|
| 491 |
|
---|
| 492 | static int
|
---|
| 493 | xmlNanoHTTPRecv(xmlNanoHTTPCtxtPtr ctxt)
|
---|
| 494 | {
|
---|
| 495 | #ifdef HAVE_POLL_H
|
---|
| 496 | struct pollfd p;
|
---|
| 497 | #else
|
---|
| 498 | fd_set rfd;
|
---|
| 499 | struct timeval tv;
|
---|
| 500 | #endif
|
---|
| 501 |
|
---|
| 502 |
|
---|
| 503 | while (ctxt->state & XML_NANO_HTTP_READ) {
|
---|
| 504 | if (ctxt->in == NULL) {
|
---|
| 505 | ctxt->in = (char *) xmlMallocAtomic(65000);
|
---|
| 506 | if (ctxt->in == NULL) {
|
---|
| 507 | xmlHTTPErrMemory("allocating input");
|
---|
| 508 | ctxt->last = -1;
|
---|
| 509 | return (-1);
|
---|
| 510 | }
|
---|
| 511 | ctxt->inlen = 65000;
|
---|
| 512 | ctxt->inptr = ctxt->content = ctxt->inrptr = ctxt->in;
|
---|
| 513 | }
|
---|
| 514 | if (ctxt->inrptr > ctxt->in + XML_NANO_HTTP_CHUNK) {
|
---|
| 515 | int delta = ctxt->inrptr - ctxt->in;
|
---|
| 516 | int len = ctxt->inptr - ctxt->inrptr;
|
---|
| 517 |
|
---|
| 518 | memmove(ctxt->in, ctxt->inrptr, len);
|
---|
| 519 | ctxt->inrptr -= delta;
|
---|
| 520 | ctxt->content -= delta;
|
---|
| 521 | ctxt->inptr -= delta;
|
---|
| 522 | }
|
---|
| 523 | if ((ctxt->in + ctxt->inlen) < (ctxt->inptr + XML_NANO_HTTP_CHUNK)) {
|
---|
| 524 | int d_inptr = ctxt->inptr - ctxt->in;
|
---|
| 525 | int d_content = ctxt->content - ctxt->in;
|
---|
| 526 | int d_inrptr = ctxt->inrptr - ctxt->in;
|
---|
| 527 | char *tmp_ptr = ctxt->in;
|
---|
| 528 |
|
---|
| 529 | ctxt->inlen *= 2;
|
---|
| 530 | ctxt->in = (char *) xmlRealloc(tmp_ptr, ctxt->inlen);
|
---|
| 531 | if (ctxt->in == NULL) {
|
---|
| 532 | xmlHTTPErrMemory("allocating input buffer");
|
---|
| 533 | xmlFree(tmp_ptr);
|
---|
| 534 | ctxt->last = -1;
|
---|
| 535 | return (-1);
|
---|
| 536 | }
|
---|
| 537 | ctxt->inptr = ctxt->in + d_inptr;
|
---|
| 538 | ctxt->content = ctxt->in + d_content;
|
---|
| 539 | ctxt->inrptr = ctxt->in + d_inrptr;
|
---|
| 540 | }
|
---|
| 541 | ctxt->last = recv(ctxt->fd, ctxt->inptr, XML_NANO_HTTP_CHUNK, 0);
|
---|
| 542 | if (ctxt->last > 0) {
|
---|
| 543 | ctxt->inptr += ctxt->last;
|
---|
| 544 | return (ctxt->last);
|
---|
| 545 | }
|
---|
| 546 | if (ctxt->last == 0) {
|
---|
| 547 | return (0);
|
---|
| 548 | }
|
---|
| 549 | if (ctxt->last == -1) {
|
---|
| 550 | switch (socket_errno()) {
|
---|
| 551 | case EINPROGRESS:
|
---|
| 552 | case EWOULDBLOCK:
|
---|
| 553 | #if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
|
---|
| 554 | case EAGAIN:
|
---|
| 555 | #endif
|
---|
| 556 | break;
|
---|
| 557 |
|
---|
| 558 | case ECONNRESET:
|
---|
| 559 | case ESHUTDOWN:
|
---|
| 560 | return (0);
|
---|
| 561 |
|
---|
| 562 | default:
|
---|
| 563 | __xmlIOErr(XML_FROM_HTTP, 0, "recv failed\n");
|
---|
| 564 | return (-1);
|
---|
| 565 | }
|
---|
| 566 | }
|
---|
| 567 | #ifdef HAVE_POLL_H
|
---|
| 568 | p.fd = ctxt->fd;
|
---|
| 569 | p.events = POLLIN;
|
---|
| 570 | if ((poll(&p, 1, timeout * 1000) < 1)
|
---|
| 571 | #if defined(EINTR)
|
---|
| 572 | && (errno != EINTR)
|
---|
| 573 | #endif
|
---|
| 574 | )
|
---|
| 575 | return (0);
|
---|
| 576 | #else /* !HAVE_POLL_H */
|
---|
| 577 | #ifndef _WINSOCKAPI_
|
---|
| 578 | if (ctxt->fd > FD_SETSIZE)
|
---|
| 579 | return 0;
|
---|
| 580 | #endif
|
---|
| 581 |
|
---|
| 582 | tv.tv_sec = timeout;
|
---|
| 583 | tv.tv_usec = 0;
|
---|
| 584 | FD_ZERO(&rfd);
|
---|
| 585 |
|
---|
| 586 | #ifdef _MSC_VER
|
---|
| 587 | #pragma warning(push)
|
---|
| 588 | #pragma warning(disable: 4018)
|
---|
| 589 | #endif
|
---|
| 590 |
|
---|
| 591 | FD_SET(ctxt->fd, &rfd);
|
---|
| 592 |
|
---|
| 593 | #ifdef _MSC_VER
|
---|
| 594 | #pragma warning(pop)
|
---|
| 595 | #endif
|
---|
| 596 |
|
---|
| 597 | if ((select(ctxt->fd + 1, &rfd, NULL, NULL, &tv) < 1)
|
---|
| 598 | #if defined(EINTR)
|
---|
| 599 | && (socket_errno() != EINTR)
|
---|
| 600 | #endif
|
---|
| 601 | )
|
---|
| 602 | return (0);
|
---|
| 603 | #endif /* !HAVE_POLL_H */
|
---|
| 604 | }
|
---|
| 605 | return (0);
|
---|
| 606 | }
|
---|
| 607 |
|
---|
| 608 | /**
|
---|
| 609 | * xmlNanoHTTPReadLine:
|
---|
| 610 | * @ctxt: an HTTP context
|
---|
| 611 | *
|
---|
| 612 | * Read one line in the HTTP server output, usually for extracting
|
---|
| 613 | * the HTTP protocol information from the answer header.
|
---|
| 614 | *
|
---|
| 615 | * Returns a newly allocated string with a copy of the line, or NULL
|
---|
| 616 | * which indicate the end of the input.
|
---|
| 617 | */
|
---|
| 618 |
|
---|
| 619 | static char *
|
---|
| 620 | xmlNanoHTTPReadLine(xmlNanoHTTPCtxtPtr ctxt) {
|
---|
| 621 | char buf[4096];
|
---|
| 622 | char *bp = buf;
|
---|
| 623 | int rc;
|
---|
| 624 |
|
---|
| 625 | while (bp - buf < 4095) {
|
---|
| 626 | if (ctxt->inrptr == ctxt->inptr) {
|
---|
| 627 | if ( (rc = xmlNanoHTTPRecv(ctxt)) == 0) {
|
---|
| 628 | if (bp == buf)
|
---|
| 629 | return(NULL);
|
---|
| 630 | else
|
---|
| 631 | *bp = 0;
|
---|
| 632 | return(xmlMemStrdup(buf));
|
---|
| 633 | }
|
---|
| 634 | else if ( rc == -1 ) {
|
---|
| 635 | return ( NULL );
|
---|
| 636 | }
|
---|
| 637 | }
|
---|
| 638 | *bp = *ctxt->inrptr++;
|
---|
| 639 | if (*bp == '\n') {
|
---|
| 640 | *bp = 0;
|
---|
| 641 | return(xmlMemStrdup(buf));
|
---|
| 642 | }
|
---|
| 643 | if (*bp != '\r')
|
---|
| 644 | bp++;
|
---|
| 645 | }
|
---|
| 646 | buf[4095] = 0;
|
---|
| 647 | return(xmlMemStrdup(buf));
|
---|
| 648 | }
|
---|
| 649 |
|
---|
| 650 |
|
---|
| 651 | /**
|
---|
| 652 | * xmlNanoHTTPScanAnswer:
|
---|
| 653 | * @ctxt: an HTTP context
|
---|
| 654 | * @line: an HTTP header line
|
---|
| 655 | *
|
---|
| 656 | * Try to extract useful information from the server answer.
|
---|
| 657 | * We currently parse and process:
|
---|
| 658 | * - The HTTP revision/ return code
|
---|
| 659 | * - The Content-Type, Mime-Type and charset used
|
---|
| 660 | * - The Location for redirect processing.
|
---|
| 661 | *
|
---|
| 662 | * Returns -1 in case of failure, the file descriptor number otherwise
|
---|
| 663 | */
|
---|
| 664 |
|
---|
| 665 | static void
|
---|
| 666 | xmlNanoHTTPScanAnswer(xmlNanoHTTPCtxtPtr ctxt, const char *line) {
|
---|
| 667 | const char *cur = line;
|
---|
| 668 |
|
---|
| 669 | if (line == NULL) return;
|
---|
| 670 |
|
---|
| 671 | if (!strncmp(line, "HTTP/", 5)) {
|
---|
| 672 | int version = 0;
|
---|
| 673 | int ret = 0;
|
---|
| 674 |
|
---|
| 675 | cur += 5;
|
---|
| 676 | while ((*cur >= '0') && (*cur <= '9')) {
|
---|
| 677 | version *= 10;
|
---|
| 678 | version += *cur - '0';
|
---|
| 679 | cur++;
|
---|
| 680 | }
|
---|
| 681 | if (*cur == '.') {
|
---|
| 682 | cur++;
|
---|
| 683 | if ((*cur >= '0') && (*cur <= '9')) {
|
---|
| 684 | version *= 10;
|
---|
| 685 | version += *cur - '0';
|
---|
| 686 | cur++;
|
---|
| 687 | }
|
---|
| 688 | while ((*cur >= '0') && (*cur <= '9'))
|
---|
| 689 | cur++;
|
---|
| 690 | } else
|
---|
| 691 | version *= 10;
|
---|
| 692 | if ((*cur != ' ') && (*cur != '\t')) return;
|
---|
| 693 | while ((*cur == ' ') || (*cur == '\t')) cur++;
|
---|
| 694 | if ((*cur < '0') || (*cur > '9')) return;
|
---|
| 695 | while ((*cur >= '0') && (*cur <= '9')) {
|
---|
| 696 | ret *= 10;
|
---|
| 697 | ret += *cur - '0';
|
---|
| 698 | cur++;
|
---|
| 699 | }
|
---|
| 700 | if ((*cur != 0) && (*cur != ' ') && (*cur != '\t')) return;
|
---|
| 701 | ctxt->returnValue = ret;
|
---|
| 702 | ctxt->version = version;
|
---|
| 703 | } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Content-Type:", 13)) {
|
---|
| 704 | const xmlChar *charset, *last, *mime;
|
---|
| 705 | cur += 13;
|
---|
| 706 | while ((*cur == ' ') || (*cur == '\t')) cur++;
|
---|
| 707 | if (ctxt->contentType != NULL)
|
---|
| 708 | xmlFree(ctxt->contentType);
|
---|
| 709 | ctxt->contentType = xmlMemStrdup(cur);
|
---|
| 710 | mime = (const xmlChar *) cur;
|
---|
| 711 | last = mime;
|
---|
| 712 | while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
|
---|
| 713 | (*last != ';') && (*last != ','))
|
---|
| 714 | last++;
|
---|
| 715 | if (ctxt->mimeType != NULL)
|
---|
| 716 | xmlFree(ctxt->mimeType);
|
---|
| 717 | ctxt->mimeType = (char *) xmlStrndup(mime, last - mime);
|
---|
| 718 | charset = xmlStrstr(BAD_CAST ctxt->contentType, BAD_CAST "charset=");
|
---|
| 719 | if (charset != NULL) {
|
---|
| 720 | charset += 8;
|
---|
| 721 | last = charset;
|
---|
| 722 | while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
|
---|
| 723 | (*last != ';') && (*last != ','))
|
---|
| 724 | last++;
|
---|
| 725 | if (ctxt->encoding != NULL)
|
---|
| 726 | xmlFree(ctxt->encoding);
|
---|
| 727 | ctxt->encoding = (char *) xmlStrndup(charset, last - charset);
|
---|
| 728 | }
|
---|
| 729 | } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"ContentType:", 12)) {
|
---|
| 730 | const xmlChar *charset, *last, *mime;
|
---|
| 731 | cur += 12;
|
---|
| 732 | if (ctxt->contentType != NULL) return;
|
---|
| 733 | while ((*cur == ' ') || (*cur == '\t')) cur++;
|
---|
| 734 | ctxt->contentType = xmlMemStrdup(cur);
|
---|
| 735 | mime = (const xmlChar *) cur;
|
---|
| 736 | last = mime;
|
---|
| 737 | while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
|
---|
| 738 | (*last != ';') && (*last != ','))
|
---|
| 739 | last++;
|
---|
| 740 | if (ctxt->mimeType != NULL)
|
---|
| 741 | xmlFree(ctxt->mimeType);
|
---|
| 742 | ctxt->mimeType = (char *) xmlStrndup(mime, last - mime);
|
---|
| 743 | charset = xmlStrstr(BAD_CAST ctxt->contentType, BAD_CAST "charset=");
|
---|
| 744 | if (charset != NULL) {
|
---|
| 745 | charset += 8;
|
---|
| 746 | last = charset;
|
---|
| 747 | while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
|
---|
| 748 | (*last != ';') && (*last != ','))
|
---|
| 749 | last++;
|
---|
| 750 | if (ctxt->encoding != NULL)
|
---|
| 751 | xmlFree(ctxt->encoding);
|
---|
| 752 | ctxt->encoding = (char *) xmlStrndup(charset, last - charset);
|
---|
| 753 | }
|
---|
| 754 | } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Location:", 9)) {
|
---|
| 755 | cur += 9;
|
---|
| 756 | while ((*cur == ' ') || (*cur == '\t')) cur++;
|
---|
| 757 | if (ctxt->location != NULL)
|
---|
| 758 | xmlFree(ctxt->location);
|
---|
| 759 | if (*cur == '/') {
|
---|
| 760 | xmlChar *tmp_http = xmlStrdup(BAD_CAST "http://");
|
---|
| 761 | xmlChar *tmp_loc =
|
---|
| 762 | xmlStrcat(tmp_http, (const xmlChar *) ctxt->hostname);
|
---|
| 763 | ctxt->location =
|
---|
| 764 | (char *) xmlStrcat (tmp_loc, (const xmlChar *) cur);
|
---|
| 765 | } else {
|
---|
| 766 | ctxt->location = xmlMemStrdup(cur);
|
---|
| 767 | }
|
---|
| 768 | } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"WWW-Authenticate:", 17)) {
|
---|
| 769 | cur += 17;
|
---|
| 770 | while ((*cur == ' ') || (*cur == '\t')) cur++;
|
---|
| 771 | if (ctxt->authHeader != NULL)
|
---|
| 772 | xmlFree(ctxt->authHeader);
|
---|
| 773 | ctxt->authHeader = xmlMemStrdup(cur);
|
---|
| 774 | } else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Proxy-Authenticate:", 19)) {
|
---|
| 775 | cur += 19;
|
---|
| 776 | while ((*cur == ' ') || (*cur == '\t')) cur++;
|
---|
| 777 | if (ctxt->authHeader != NULL)
|
---|
| 778 | xmlFree(ctxt->authHeader);
|
---|
| 779 | ctxt->authHeader = xmlMemStrdup(cur);
|
---|
| 780 | #ifdef LIBXML_ZLIB_ENABLED
|
---|
| 781 | } else if ( !xmlStrncasecmp( BAD_CAST line, BAD_CAST"Content-Encoding:", 17) ) {
|
---|
| 782 | cur += 17;
|
---|
| 783 | while ((*cur == ' ') || (*cur == '\t')) cur++;
|
---|
| 784 | if ( !xmlStrncasecmp( BAD_CAST cur, BAD_CAST"gzip", 4) ) {
|
---|
| 785 | ctxt->usesGzip = 1;
|
---|
| 786 |
|
---|
| 787 | ctxt->strm = xmlMalloc(sizeof(z_stream));
|
---|
| 788 |
|
---|
| 789 | if (ctxt->strm != NULL) {
|
---|
| 790 | ctxt->strm->zalloc = Z_NULL;
|
---|
| 791 | ctxt->strm->zfree = Z_NULL;
|
---|
| 792 | ctxt->strm->opaque = Z_NULL;
|
---|
| 793 | ctxt->strm->avail_in = 0;
|
---|
| 794 | ctxt->strm->next_in = Z_NULL;
|
---|
| 795 |
|
---|
| 796 | inflateInit2( ctxt->strm, 31 );
|
---|
| 797 | }
|
---|
| 798 | }
|
---|
| 799 | #endif
|
---|
| 800 | } else if ( !xmlStrncasecmp( BAD_CAST line, BAD_CAST"Content-Length:", 15) ) {
|
---|
| 801 | cur += 15;
|
---|
| 802 | ctxt->ContentLength = strtol( cur, NULL, 10 );
|
---|
| 803 | }
|
---|
| 804 | }
|
---|
| 805 |
|
---|
| 806 | /**
|
---|
| 807 | * xmlNanoHTTPConnectAttempt:
|
---|
| 808 | * @addr: a socket address structure
|
---|
| 809 | *
|
---|
| 810 | * Attempt a connection to the given IP:port endpoint. It forces
|
---|
| 811 | * non-blocking semantic on the socket, and allow 60 seconds for
|
---|
| 812 | * the host to answer.
|
---|
| 813 | *
|
---|
| 814 | * Returns -1 in case of failure, the file descriptor number otherwise
|
---|
| 815 | */
|
---|
| 816 |
|
---|
| 817 | static SOCKET
|
---|
| 818 | xmlNanoHTTPConnectAttempt(struct sockaddr *addr)
|
---|
| 819 | {
|
---|
| 820 | #ifndef HAVE_POLL_H
|
---|
| 821 | fd_set wfd;
|
---|
| 822 | #ifdef _WINSOCKAPI_
|
---|
| 823 | fd_set xfd;
|
---|
| 824 | #endif
|
---|
| 825 | struct timeval tv;
|
---|
| 826 | #else /* !HAVE_POLL_H */
|
---|
| 827 | struct pollfd p;
|
---|
| 828 | #endif /* !HAVE_POLL_H */
|
---|
| 829 | int status;
|
---|
| 830 |
|
---|
| 831 | int addrlen;
|
---|
| 832 |
|
---|
| 833 | SOCKET s;
|
---|
| 834 |
|
---|
| 835 | #ifdef SUPPORT_IP6
|
---|
| 836 | if (addr->sa_family == AF_INET6) {
|
---|
| 837 | s = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP);
|
---|
| 838 | addrlen = sizeof(struct sockaddr_in6);
|
---|
| 839 | } else
|
---|
| 840 | #endif
|
---|
| 841 | {
|
---|
| 842 | s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
|
---|
| 843 | addrlen = sizeof(struct sockaddr_in);
|
---|
| 844 | }
|
---|
| 845 | if (s == INVALID_SOCKET) {
|
---|
| 846 | __xmlIOErr(XML_FROM_HTTP, 0, "socket failed\n");
|
---|
| 847 | return INVALID_SOCKET;
|
---|
| 848 | }
|
---|
| 849 | #ifdef _WINSOCKAPI_
|
---|
| 850 | {
|
---|
| 851 | u_long one = 1;
|
---|
| 852 |
|
---|
| 853 | status = ioctlsocket(s, FIONBIO, &one) == SOCKET_ERROR ? -1 : 0;
|
---|
| 854 | }
|
---|
| 855 | #else /* _WINSOCKAPI_ */
|
---|
| 856 | #if defined(VMS)
|
---|
| 857 | {
|
---|
| 858 | int enable = 1;
|
---|
| 859 |
|
---|
| 860 | status = ioctl(s, FIONBIO, &enable);
|
---|
| 861 | }
|
---|
| 862 | #else /* VMS */
|
---|
| 863 | if ((status = fcntl(s, F_GETFL, 0)) != -1) {
|
---|
| 864 | #ifdef O_NONBLOCK
|
---|
| 865 | status |= O_NONBLOCK;
|
---|
| 866 | #else /* O_NONBLOCK */
|
---|
| 867 | #ifdef F_NDELAY
|
---|
| 868 | status |= F_NDELAY;
|
---|
| 869 | #endif /* F_NDELAY */
|
---|
| 870 | #endif /* !O_NONBLOCK */
|
---|
| 871 | status = fcntl(s, F_SETFL, status);
|
---|
| 872 | }
|
---|
| 873 | if (status < 0) {
|
---|
| 874 | __xmlIOErr(XML_FROM_HTTP, 0, "error setting non-blocking IO\n");
|
---|
| 875 | closesocket(s);
|
---|
| 876 | return INVALID_SOCKET;
|
---|
| 877 | }
|
---|
| 878 | #endif /* !VMS */
|
---|
| 879 | #endif /* !_WINSOCKAPI_ */
|
---|
| 880 |
|
---|
| 881 | if (connect(s, addr, addrlen) == -1) {
|
---|
| 882 | switch (socket_errno()) {
|
---|
| 883 | case EINPROGRESS:
|
---|
| 884 | case EWOULDBLOCK:
|
---|
| 885 | break;
|
---|
| 886 | default:
|
---|
| 887 | __xmlIOErr(XML_FROM_HTTP, 0,
|
---|
| 888 | "error connecting to HTTP server");
|
---|
| 889 | closesocket(s);
|
---|
| 890 | return INVALID_SOCKET;
|
---|
| 891 | }
|
---|
| 892 | }
|
---|
| 893 | #ifndef HAVE_POLL_H
|
---|
| 894 | tv.tv_sec = timeout;
|
---|
| 895 | tv.tv_usec = 0;
|
---|
| 896 |
|
---|
| 897 | #ifdef _MSC_VER
|
---|
| 898 | #pragma warning(push)
|
---|
| 899 | #pragma warning(disable: 4018)
|
---|
| 900 | #endif
|
---|
| 901 | #ifndef _WINSOCKAPI_
|
---|
| 902 | if (s > FD_SETSIZE)
|
---|
| 903 | return INVALID_SOCKET;
|
---|
| 904 | #endif
|
---|
| 905 | FD_ZERO(&wfd);
|
---|
| 906 | FD_SET(s, &wfd);
|
---|
| 907 |
|
---|
| 908 | #ifdef _WINSOCKAPI_
|
---|
| 909 | FD_ZERO(&xfd);
|
---|
| 910 | FD_SET(s, &xfd);
|
---|
| 911 |
|
---|
| 912 | switch (select(s + 1, NULL, &wfd, &xfd, &tv))
|
---|
| 913 | #else
|
---|
| 914 | switch (select(s + 1, NULL, &wfd, NULL, &tv))
|
---|
| 915 | #endif
|
---|
| 916 | #ifdef _MSC_VER
|
---|
| 917 | #pragma warning(pop)
|
---|
| 918 | #endif
|
---|
| 919 |
|
---|
| 920 | #else /* !HAVE_POLL_H */
|
---|
| 921 | p.fd = s;
|
---|
| 922 | p.events = POLLOUT;
|
---|
| 923 | switch (poll(&p, 1, timeout * 1000))
|
---|
| 924 | #endif /* !HAVE_POLL_H */
|
---|
| 925 |
|
---|
| 926 | {
|
---|
| 927 | case 0:
|
---|
| 928 | /* Time out */
|
---|
| 929 | __xmlIOErr(XML_FROM_HTTP, 0, "Connect attempt timed out");
|
---|
| 930 | closesocket(s);
|
---|
| 931 | return INVALID_SOCKET;
|
---|
| 932 | case -1:
|
---|
| 933 | /* Ermm.. ?? */
|
---|
| 934 | __xmlIOErr(XML_FROM_HTTP, 0, "Connect failed");
|
---|
| 935 | closesocket(s);
|
---|
| 936 | return INVALID_SOCKET;
|
---|
| 937 | }
|
---|
| 938 |
|
---|
| 939 | #ifndef HAVE_POLL_H
|
---|
| 940 | if (FD_ISSET(s, &wfd)
|
---|
| 941 | #ifdef _WINSOCKAPI_
|
---|
| 942 | || FD_ISSET(s, &xfd)
|
---|
| 943 | #endif
|
---|
| 944 | )
|
---|
| 945 | #else /* !HAVE_POLL_H */
|
---|
| 946 | if (p.revents == POLLOUT)
|
---|
| 947 | #endif /* !HAVE_POLL_H */
|
---|
| 948 | {
|
---|
| 949 | XML_SOCKLEN_T len;
|
---|
| 950 |
|
---|
| 951 | len = sizeof(status);
|
---|
| 952 | #ifdef SO_ERROR
|
---|
| 953 | if (getsockopt(s, SOL_SOCKET, SO_ERROR, (char *) &status, &len) <
|
---|
| 954 | 0) {
|
---|
| 955 | /* Solaris error code */
|
---|
| 956 | __xmlIOErr(XML_FROM_HTTP, 0, "getsockopt failed\n");
|
---|
| 957 | closesocket(s);
|
---|
| 958 | return INVALID_SOCKET;
|
---|
| 959 | }
|
---|
| 960 | #endif
|
---|
| 961 | if (status) {
|
---|
| 962 | __xmlIOErr(XML_FROM_HTTP, 0,
|
---|
| 963 | "Error connecting to remote host");
|
---|
| 964 | closesocket(s);
|
---|
| 965 | errno = status;
|
---|
| 966 | return INVALID_SOCKET;
|
---|
| 967 | }
|
---|
| 968 | } else {
|
---|
| 969 | /* pbm */
|
---|
| 970 | __xmlIOErr(XML_FROM_HTTP, 0, "select failed\n");
|
---|
| 971 | closesocket(s);
|
---|
| 972 | return INVALID_SOCKET;
|
---|
| 973 | }
|
---|
| 974 |
|
---|
| 975 | return (s);
|
---|
| 976 | }
|
---|
| 977 |
|
---|
| 978 | /**
|
---|
| 979 | * xmlNanoHTTPConnectHost:
|
---|
| 980 | * @host: the host name
|
---|
| 981 | * @port: the port number
|
---|
| 982 | *
|
---|
| 983 | * Attempt a connection to the given host:port endpoint. It tries
|
---|
| 984 | * the multiple IP provided by the DNS if available.
|
---|
| 985 | *
|
---|
| 986 | * Returns -1 in case of failure, the file descriptor number otherwise
|
---|
| 987 | */
|
---|
| 988 |
|
---|
| 989 | static SOCKET
|
---|
| 990 | xmlNanoHTTPConnectHost(const char *host, int port)
|
---|
| 991 | {
|
---|
| 992 | struct sockaddr *addr = NULL;
|
---|
| 993 | struct sockaddr_in sockin;
|
---|
| 994 |
|
---|
| 995 | #ifdef SUPPORT_IP6
|
---|
| 996 | struct sockaddr_in6 sockin6;
|
---|
| 997 | #endif
|
---|
| 998 | SOCKET s;
|
---|
| 999 |
|
---|
| 1000 | memset (&sockin, 0, sizeof(sockin));
|
---|
| 1001 |
|
---|
| 1002 | #if defined(SUPPORT_IP6)
|
---|
| 1003 | {
|
---|
| 1004 | int status;
|
---|
| 1005 | struct addrinfo hints, *res, *result;
|
---|
| 1006 |
|
---|
| 1007 | memset (&sockin6, 0, sizeof(sockin6));
|
---|
| 1008 |
|
---|
| 1009 | result = NULL;
|
---|
| 1010 | memset (&hints, 0,sizeof(hints));
|
---|
| 1011 | hints.ai_socktype = SOCK_STREAM;
|
---|
| 1012 |
|
---|
| 1013 | status = getaddrinfo (host, NULL, &hints, &result);
|
---|
| 1014 | if (status) {
|
---|
| 1015 | __xmlIOErr(XML_FROM_HTTP, 0, "getaddrinfo failed\n");
|
---|
| 1016 | return INVALID_SOCKET;
|
---|
| 1017 | }
|
---|
| 1018 |
|
---|
| 1019 | for (res = result; res; res = res->ai_next) {
|
---|
| 1020 | if (res->ai_family == AF_INET) {
|
---|
| 1021 | if ((size_t)res->ai_addrlen > sizeof(sockin)) {
|
---|
| 1022 | __xmlIOErr(XML_FROM_HTTP, 0, "address size mismatch\n");
|
---|
| 1023 | freeaddrinfo (result);
|
---|
| 1024 | return INVALID_SOCKET;
|
---|
| 1025 | }
|
---|
| 1026 | memcpy (&sockin, res->ai_addr, res->ai_addrlen);
|
---|
| 1027 | sockin.sin_port = htons (port);
|
---|
| 1028 | addr = (struct sockaddr *)&sockin;
|
---|
| 1029 | } else if (res->ai_family == AF_INET6) {
|
---|
| 1030 | if ((size_t)res->ai_addrlen > sizeof(sockin6)) {
|
---|
| 1031 | __xmlIOErr(XML_FROM_HTTP, 0, "address size mismatch\n");
|
---|
| 1032 | freeaddrinfo (result);
|
---|
| 1033 | return INVALID_SOCKET;
|
---|
| 1034 | }
|
---|
| 1035 | memcpy (&sockin6, res->ai_addr, res->ai_addrlen);
|
---|
| 1036 | sockin6.sin6_port = htons (port);
|
---|
| 1037 | addr = (struct sockaddr *)&sockin6;
|
---|
| 1038 | } else
|
---|
| 1039 | continue; /* for */
|
---|
| 1040 |
|
---|
| 1041 | s = xmlNanoHTTPConnectAttempt (addr);
|
---|
| 1042 | if (s != INVALID_SOCKET) {
|
---|
| 1043 | freeaddrinfo (result);
|
---|
| 1044 | return (s);
|
---|
| 1045 | }
|
---|
| 1046 | }
|
---|
| 1047 |
|
---|
| 1048 | if (result)
|
---|
| 1049 | freeaddrinfo (result);
|
---|
| 1050 | }
|
---|
| 1051 | #else
|
---|
| 1052 | {
|
---|
| 1053 | struct hostent *h;
|
---|
| 1054 | struct in_addr ia;
|
---|
| 1055 | int i;
|
---|
| 1056 |
|
---|
| 1057 | h = gethostbyname (GETHOSTBYNAME_ARG_CAST host);
|
---|
| 1058 | if (h == NULL) {
|
---|
| 1059 |
|
---|
| 1060 | /*
|
---|
| 1061 | * Okay, I got fed up by the non-portability of this error message
|
---|
| 1062 | * extraction code. it work on Linux, if it work on your platform
|
---|
| 1063 | * and one want to enable it, send me the defined(foobar) needed
|
---|
| 1064 | */
|
---|
| 1065 | #if defined(HAVE_NETDB_H) && defined(HOST_NOT_FOUND) && defined(__linux__)
|
---|
| 1066 | const char *h_err_txt = "";
|
---|
| 1067 |
|
---|
| 1068 | switch (h_errno) {
|
---|
| 1069 | case HOST_NOT_FOUND:
|
---|
| 1070 | h_err_txt = "Authoritative host not found";
|
---|
| 1071 | break;
|
---|
| 1072 |
|
---|
| 1073 | case TRY_AGAIN:
|
---|
| 1074 | h_err_txt =
|
---|
| 1075 | "Non-authoritative host not found or server failure.";
|
---|
| 1076 | break;
|
---|
| 1077 |
|
---|
| 1078 | case NO_RECOVERY:
|
---|
| 1079 | h_err_txt =
|
---|
| 1080 | "Non-recoverable errors: FORMERR, REFUSED, or NOTIMP.";
|
---|
| 1081 | break;
|
---|
| 1082 |
|
---|
| 1083 | #ifdef NO_ADDRESS
|
---|
| 1084 | case NO_ADDRESS:
|
---|
| 1085 | h_err_txt =
|
---|
| 1086 | "Valid name, no data record of requested type.";
|
---|
| 1087 | break;
|
---|
| 1088 | #endif
|
---|
| 1089 |
|
---|
| 1090 | default:
|
---|
| 1091 | h_err_txt = "No error text defined.";
|
---|
| 1092 | break;
|
---|
| 1093 | }
|
---|
| 1094 | __xmlIOErr(XML_FROM_HTTP, 0, h_err_txt);
|
---|
| 1095 | #else
|
---|
| 1096 | __xmlIOErr(XML_FROM_HTTP, 0, "Failed to resolve host");
|
---|
| 1097 | #endif
|
---|
| 1098 | return INVALID_SOCKET;
|
---|
| 1099 | }
|
---|
| 1100 |
|
---|
| 1101 | for (i = 0; h->h_addr_list[i]; i++) {
|
---|
| 1102 | if (h->h_addrtype == AF_INET) {
|
---|
| 1103 | /* A records (IPv4) */
|
---|
| 1104 | if ((unsigned int) h->h_length > sizeof(ia)) {
|
---|
| 1105 | __xmlIOErr(XML_FROM_HTTP, 0, "address size mismatch\n");
|
---|
| 1106 | return INVALID_SOCKET;
|
---|
| 1107 | }
|
---|
| 1108 | memcpy (&ia, h->h_addr_list[i], h->h_length);
|
---|
| 1109 | sockin.sin_family = h->h_addrtype;
|
---|
| 1110 | sockin.sin_addr = ia;
|
---|
| 1111 | sockin.sin_port = (unsigned short)htons ((unsigned short)port);
|
---|
| 1112 | addr = (struct sockaddr *) &sockin;
|
---|
| 1113 | } else
|
---|
| 1114 | break; /* for */
|
---|
| 1115 |
|
---|
| 1116 | s = xmlNanoHTTPConnectAttempt (addr);
|
---|
| 1117 | if (s != INVALID_SOCKET)
|
---|
| 1118 | return (s);
|
---|
| 1119 | }
|
---|
| 1120 | }
|
---|
| 1121 | #endif
|
---|
| 1122 |
|
---|
| 1123 | return INVALID_SOCKET;
|
---|
| 1124 | }
|
---|
| 1125 |
|
---|
| 1126 |
|
---|
| 1127 | /**
|
---|
| 1128 | * xmlNanoHTTPOpen:
|
---|
| 1129 | * @URL: The URL to load
|
---|
| 1130 | * @contentType: if available the Content-Type information will be
|
---|
| 1131 | * returned at that location
|
---|
| 1132 | *
|
---|
| 1133 | * This function try to open a connection to the indicated resource
|
---|
| 1134 | * via HTTP GET.
|
---|
| 1135 | *
|
---|
| 1136 | * Returns NULL in case of failure, otherwise a request handler.
|
---|
| 1137 | * The contentType, if provided must be freed by the caller
|
---|
| 1138 | */
|
---|
| 1139 |
|
---|
| 1140 | void*
|
---|
| 1141 | xmlNanoHTTPOpen(const char *URL, char **contentType) {
|
---|
| 1142 | if (contentType != NULL) *contentType = NULL;
|
---|
| 1143 | return(xmlNanoHTTPMethod(URL, NULL, NULL, contentType, NULL, 0));
|
---|
| 1144 | }
|
---|
| 1145 |
|
---|
| 1146 | /**
|
---|
| 1147 | * xmlNanoHTTPOpenRedir:
|
---|
| 1148 | * @URL: The URL to load
|
---|
| 1149 | * @contentType: if available the Content-Type information will be
|
---|
| 1150 | * returned at that location
|
---|
| 1151 | * @redir: if available the redirected URL will be returned
|
---|
| 1152 | *
|
---|
| 1153 | * This function try to open a connection to the indicated resource
|
---|
| 1154 | * via HTTP GET.
|
---|
| 1155 | *
|
---|
| 1156 | * Returns NULL in case of failure, otherwise a request handler.
|
---|
| 1157 | * The contentType, if provided must be freed by the caller
|
---|
| 1158 | */
|
---|
| 1159 |
|
---|
| 1160 | void*
|
---|
| 1161 | xmlNanoHTTPOpenRedir(const char *URL, char **contentType, char **redir) {
|
---|
| 1162 | if (contentType != NULL) *contentType = NULL;
|
---|
| 1163 | if (redir != NULL) *redir = NULL;
|
---|
| 1164 | return(xmlNanoHTTPMethodRedir(URL, NULL, NULL, contentType, redir, NULL,0));
|
---|
| 1165 | }
|
---|
| 1166 |
|
---|
| 1167 | /**
|
---|
| 1168 | * xmlNanoHTTPRead:
|
---|
| 1169 | * @ctx: the HTTP context
|
---|
| 1170 | * @dest: a buffer
|
---|
| 1171 | * @len: the buffer length
|
---|
| 1172 | *
|
---|
| 1173 | * This function tries to read @len bytes from the existing HTTP connection
|
---|
| 1174 | * and saves them in @dest. This is a blocking call.
|
---|
| 1175 | *
|
---|
| 1176 | * Returns the number of byte read. 0 is an indication of an end of connection.
|
---|
| 1177 | * -1 indicates a parameter error.
|
---|
| 1178 | */
|
---|
| 1179 | int
|
---|
| 1180 | xmlNanoHTTPRead(void *ctx, void *dest, int len) {
|
---|
| 1181 | xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
|
---|
| 1182 | #ifdef LIBXML_ZLIB_ENABLED
|
---|
| 1183 | int bytes_read = 0;
|
---|
| 1184 | int orig_avail_in;
|
---|
| 1185 | int z_ret;
|
---|
| 1186 | #endif
|
---|
| 1187 |
|
---|
| 1188 | if (ctx == NULL) return(-1);
|
---|
| 1189 | if (dest == NULL) return(-1);
|
---|
| 1190 | if (len <= 0) return(0);
|
---|
| 1191 |
|
---|
| 1192 | #ifdef LIBXML_ZLIB_ENABLED
|
---|
| 1193 | if (ctxt->usesGzip == 1) {
|
---|
| 1194 | if (ctxt->strm == NULL) return(0);
|
---|
| 1195 |
|
---|
| 1196 | ctxt->strm->next_out = dest;
|
---|
| 1197 | ctxt->strm->avail_out = len;
|
---|
| 1198 | ctxt->strm->avail_in = ctxt->inptr - ctxt->inrptr;
|
---|
| 1199 |
|
---|
| 1200 | while (ctxt->strm->avail_out > 0 &&
|
---|
| 1201 | (ctxt->strm->avail_in > 0 || xmlNanoHTTPRecv(ctxt) > 0)) {
|
---|
| 1202 | orig_avail_in = ctxt->strm->avail_in =
|
---|
| 1203 | ctxt->inptr - ctxt->inrptr - bytes_read;
|
---|
| 1204 | ctxt->strm->next_in = BAD_CAST (ctxt->inrptr + bytes_read);
|
---|
| 1205 |
|
---|
| 1206 | z_ret = inflate(ctxt->strm, Z_NO_FLUSH);
|
---|
| 1207 | bytes_read += orig_avail_in - ctxt->strm->avail_in;
|
---|
| 1208 |
|
---|
| 1209 | if (z_ret != Z_OK) break;
|
---|
| 1210 | }
|
---|
| 1211 |
|
---|
| 1212 | ctxt->inrptr += bytes_read;
|
---|
| 1213 | return(len - ctxt->strm->avail_out);
|
---|
| 1214 | }
|
---|
| 1215 | #endif
|
---|
| 1216 |
|
---|
| 1217 | while (ctxt->inptr - ctxt->inrptr < len) {
|
---|
| 1218 | if (xmlNanoHTTPRecv(ctxt) <= 0) break;
|
---|
| 1219 | }
|
---|
| 1220 | if (ctxt->inptr - ctxt->inrptr < len)
|
---|
| 1221 | len = ctxt->inptr - ctxt->inrptr;
|
---|
| 1222 | memcpy(dest, ctxt->inrptr, len);
|
---|
| 1223 | ctxt->inrptr += len;
|
---|
| 1224 | return(len);
|
---|
| 1225 | }
|
---|
| 1226 |
|
---|
| 1227 | /**
|
---|
| 1228 | * xmlNanoHTTPClose:
|
---|
| 1229 | * @ctx: the HTTP context
|
---|
| 1230 | *
|
---|
| 1231 | * This function closes an HTTP context, it ends up the connection and
|
---|
| 1232 | * free all data related to it.
|
---|
| 1233 | */
|
---|
| 1234 | void
|
---|
| 1235 | xmlNanoHTTPClose(void *ctx) {
|
---|
| 1236 | xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
|
---|
| 1237 |
|
---|
| 1238 | if (ctx == NULL) return;
|
---|
| 1239 |
|
---|
| 1240 | xmlNanoHTTPFreeCtxt(ctxt);
|
---|
| 1241 | }
|
---|
| 1242 |
|
---|
| 1243 |
|
---|
| 1244 | /**
|
---|
| 1245 | * xmlNanoHTTPHostnameMatch:
|
---|
| 1246 | * @pattern: The pattern as it appears in no_proxy environment variable
|
---|
| 1247 | * @hostname: The hostname to test as it appears in the URL
|
---|
| 1248 | *
|
---|
| 1249 | * This function tests whether a given hostname matches a pattern. The pattern
|
---|
| 1250 | * usually is a token from the no_proxy environment variable. Wildcards in the
|
---|
| 1251 | * pattern are not supported.
|
---|
| 1252 | *
|
---|
| 1253 | * Returns true, iff hostname matches the pattern.
|
---|
| 1254 | */
|
---|
| 1255 |
|
---|
| 1256 | static int
|
---|
| 1257 | xmlNanoHTTPHostnameMatch(const char *pattern, const char *hostname) {
|
---|
| 1258 | int idx_pattern, idx_hostname;
|
---|
| 1259 | const char * pattern_start;
|
---|
| 1260 |
|
---|
| 1261 | if (!pattern || *pattern == '\0' || !hostname)
|
---|
| 1262 | return 0;
|
---|
| 1263 |
|
---|
| 1264 | /* Ignore trailing '.' */
|
---|
| 1265 | if (*pattern == '.') {
|
---|
| 1266 | idx_pattern = strlen(pattern) -1;
|
---|
| 1267 | pattern_start = pattern + 1;
|
---|
| 1268 | }
|
---|
| 1269 | else {
|
---|
| 1270 | idx_pattern = strlen(pattern);
|
---|
| 1271 | pattern_start = pattern;
|
---|
| 1272 | }
|
---|
| 1273 | idx_hostname = strlen(hostname);
|
---|
| 1274 |
|
---|
| 1275 | for (; idx_pattern >= 0 && idx_hostname >= 0;
|
---|
| 1276 | --idx_pattern, --idx_hostname) {
|
---|
| 1277 | if (tolower(pattern_start[idx_pattern]) != tolower(hostname[idx_hostname]))
|
---|
| 1278 | break;
|
---|
| 1279 | }
|
---|
| 1280 |
|
---|
| 1281 | return idx_pattern == -1 && (idx_hostname == -1|| hostname[idx_hostname] == '.');
|
---|
| 1282 | }
|
---|
| 1283 |
|
---|
| 1284 |
|
---|
| 1285 | /**
|
---|
| 1286 | * xmlNanoHTTPBypassProxy:
|
---|
| 1287 | * @hostname: The hostname as it appears in the URL
|
---|
| 1288 | *
|
---|
| 1289 | * This function evaluates the no_proxy environment variable and returns
|
---|
| 1290 | * whether the proxy server should be bypassed for a given host.
|
---|
| 1291 | *
|
---|
| 1292 | * Returns true, iff a proxy server should be bypassed for the given hostname.
|
---|
| 1293 | */
|
---|
| 1294 |
|
---|
| 1295 | static int
|
---|
| 1296 | xmlNanoHTTPBypassProxy(const char *hostname) {
|
---|
| 1297 | size_t envlen;
|
---|
| 1298 | char *env = getenv("no_proxy"), *cpy=NULL, *p=NULL;
|
---|
| 1299 | if (!env)
|
---|
| 1300 | return 0;
|
---|
| 1301 |
|
---|
| 1302 | /* (Avoid strdup because it's not portable.) */
|
---|
| 1303 | envlen = strlen(env) + 1;
|
---|
| 1304 | cpy = xmlMalloc(envlen);
|
---|
| 1305 | memcpy(cpy, env, envlen);
|
---|
| 1306 | env = cpy;
|
---|
| 1307 |
|
---|
| 1308 | /* The remainder of the function is basically a tokenizing: */
|
---|
| 1309 | while (isspace(*env))
|
---|
| 1310 | ++env;
|
---|
| 1311 | if (*env == '\0') {
|
---|
| 1312 | xmlFree(cpy);
|
---|
| 1313 | return 0;
|
---|
| 1314 | }
|
---|
| 1315 |
|
---|
| 1316 | p = env;
|
---|
| 1317 | while (*env) {
|
---|
| 1318 |
|
---|
| 1319 | if (*env != ',') {
|
---|
| 1320 | ++env;
|
---|
| 1321 | continue;
|
---|
| 1322 | }
|
---|
| 1323 |
|
---|
| 1324 | *(env++) = '\0';
|
---|
| 1325 | if (xmlNanoHTTPHostnameMatch(p, hostname)) {
|
---|
| 1326 | xmlFree(cpy);
|
---|
| 1327 | return 1;
|
---|
| 1328 | }
|
---|
| 1329 |
|
---|
| 1330 | while (isspace(*env))
|
---|
| 1331 | ++env;
|
---|
| 1332 | p = env;
|
---|
| 1333 | }
|
---|
| 1334 | if (xmlNanoHTTPHostnameMatch(p, hostname)) {
|
---|
| 1335 | xmlFree(cpy);
|
---|
| 1336 | return 1;
|
---|
| 1337 | }
|
---|
| 1338 |
|
---|
| 1339 | xmlFree(cpy);
|
---|
| 1340 | return 0;
|
---|
| 1341 | }
|
---|
| 1342 |
|
---|
| 1343 |
|
---|
| 1344 | /**
|
---|
| 1345 | * xmlNanoHTTPMethodRedir:
|
---|
| 1346 | * @URL: The URL to load
|
---|
| 1347 | * @method: the HTTP method to use
|
---|
| 1348 | * @input: the input string if any
|
---|
| 1349 | * @contentType: the Content-Type information IN and OUT
|
---|
| 1350 | * @redir: the redirected URL OUT
|
---|
| 1351 | * @headers: the extra headers
|
---|
| 1352 | * @ilen: input length
|
---|
| 1353 | *
|
---|
| 1354 | * This function try to open a connection to the indicated resource
|
---|
| 1355 | * via HTTP using the given @method, adding the given extra headers
|
---|
| 1356 | * and the input buffer for the request content.
|
---|
| 1357 | *
|
---|
| 1358 | * Returns NULL in case of failure, otherwise a request handler.
|
---|
| 1359 | * The contentType, or redir, if provided must be freed by the caller
|
---|
| 1360 | */
|
---|
| 1361 |
|
---|
| 1362 | void*
|
---|
| 1363 | xmlNanoHTTPMethodRedir(const char *URL, const char *method, const char *input,
|
---|
| 1364 | char **contentType, char **redir,
|
---|
| 1365 | const char *headers, int ilen ) {
|
---|
| 1366 | xmlNanoHTTPCtxtPtr ctxt;
|
---|
| 1367 | char *bp, *p;
|
---|
| 1368 | int blen;
|
---|
| 1369 | SOCKET ret;
|
---|
| 1370 | int nbRedirects = 0;
|
---|
| 1371 | int use_proxy;
|
---|
| 1372 | char *redirURL = NULL;
|
---|
| 1373 |
|
---|
| 1374 | if (URL == NULL) return(NULL);
|
---|
| 1375 | if (method == NULL) method = "GET";
|
---|
| 1376 | xmlNanoHTTPInit();
|
---|
| 1377 |
|
---|
| 1378 | retry:
|
---|
| 1379 | if (redirURL == NULL) {
|
---|
| 1380 | ctxt = xmlNanoHTTPNewCtxt(URL);
|
---|
| 1381 | if (ctxt == NULL)
|
---|
| 1382 | return(NULL);
|
---|
| 1383 | } else {
|
---|
| 1384 | ctxt = xmlNanoHTTPNewCtxt(redirURL);
|
---|
| 1385 | if (ctxt == NULL)
|
---|
| 1386 | return(NULL);
|
---|
| 1387 | ctxt->location = xmlMemStrdup(redirURL);
|
---|
| 1388 | }
|
---|
| 1389 |
|
---|
| 1390 | if ((ctxt->protocol == NULL) || (strcmp(ctxt->protocol, "http"))) {
|
---|
| 1391 | __xmlIOErr(XML_FROM_HTTP, XML_HTTP_URL_SYNTAX, "Not a valid HTTP URI");
|
---|
| 1392 | xmlNanoHTTPFreeCtxt(ctxt);
|
---|
| 1393 | if (redirURL != NULL) xmlFree(redirURL);
|
---|
| 1394 | return(NULL);
|
---|
| 1395 | }
|
---|
| 1396 | if (ctxt->hostname == NULL) {
|
---|
| 1397 | __xmlIOErr(XML_FROM_HTTP, XML_HTTP_UNKNOWN_HOST,
|
---|
| 1398 | "Failed to identify host in URI");
|
---|
| 1399 | xmlNanoHTTPFreeCtxt(ctxt);
|
---|
| 1400 | if (redirURL != NULL) xmlFree(redirURL);
|
---|
| 1401 | return(NULL);
|
---|
| 1402 | }
|
---|
| 1403 | use_proxy = proxy && !xmlNanoHTTPBypassProxy(ctxt->hostname);
|
---|
| 1404 | if (use_proxy) {
|
---|
| 1405 | blen = strlen(ctxt->hostname) * 2 + 16;
|
---|
| 1406 | ret = xmlNanoHTTPConnectHost(proxy, proxyPort);
|
---|
| 1407 | }
|
---|
| 1408 | else {
|
---|
| 1409 | blen = strlen(ctxt->hostname);
|
---|
| 1410 | ret = xmlNanoHTTPConnectHost(ctxt->hostname, ctxt->port);
|
---|
| 1411 | }
|
---|
| 1412 | if (ret == INVALID_SOCKET) {
|
---|
| 1413 | xmlNanoHTTPFreeCtxt(ctxt);
|
---|
| 1414 | if (redirURL != NULL) xmlFree(redirURL);
|
---|
| 1415 | return(NULL);
|
---|
| 1416 | }
|
---|
| 1417 | ctxt->fd = ret;
|
---|
| 1418 |
|
---|
| 1419 | if (input == NULL)
|
---|
| 1420 | ilen = 0;
|
---|
| 1421 | else
|
---|
| 1422 | blen += 36;
|
---|
| 1423 |
|
---|
| 1424 | if (headers != NULL)
|
---|
| 1425 | blen += strlen(headers) + 2;
|
---|
| 1426 | if (contentType && *contentType)
|
---|
| 1427 | /* reserve for string plus 'Content-Type: \r\n" */
|
---|
| 1428 | blen += strlen(*contentType) + 16;
|
---|
| 1429 | if (ctxt->query != NULL)
|
---|
| 1430 | /* 1 for '?' */
|
---|
| 1431 | blen += strlen(ctxt->query) + 1;
|
---|
| 1432 | blen += strlen(method) + strlen(ctxt->path) + 24;
|
---|
| 1433 | #ifdef LIBXML_ZLIB_ENABLED
|
---|
| 1434 | /* reserve for possible 'Accept-Encoding: gzip' string */
|
---|
| 1435 | blen += 23;
|
---|
| 1436 | #endif
|
---|
| 1437 | if (ctxt->port != 80) {
|
---|
| 1438 | /* reserve space for ':xxxxx', incl. potential proxy */
|
---|
| 1439 | if (use_proxy)
|
---|
| 1440 | blen += 17;
|
---|
| 1441 | else
|
---|
| 1442 | blen += 11;
|
---|
| 1443 | }
|
---|
| 1444 | bp = (char*)xmlMallocAtomic(blen);
|
---|
| 1445 | if ( bp == NULL ) {
|
---|
| 1446 | xmlNanoHTTPFreeCtxt( ctxt );
|
---|
| 1447 | xmlHTTPErrMemory("allocating header buffer");
|
---|
| 1448 | return ( NULL );
|
---|
| 1449 | }
|
---|
| 1450 |
|
---|
| 1451 | p = bp;
|
---|
| 1452 |
|
---|
| 1453 | if (use_proxy) {
|
---|
| 1454 | if (ctxt->port != 80) {
|
---|
| 1455 | p += snprintf( p, blen - (p - bp), "%s http://%s:%d%s",
|
---|
| 1456 | method, ctxt->hostname,
|
---|
| 1457 | ctxt->port, ctxt->path );
|
---|
| 1458 | }
|
---|
| 1459 | else
|
---|
| 1460 | p += snprintf( p, blen - (p - bp), "%s http://%s%s", method,
|
---|
| 1461 | ctxt->hostname, ctxt->path);
|
---|
| 1462 | }
|
---|
| 1463 | else
|
---|
| 1464 | p += snprintf( p, blen - (p - bp), "%s %s", method, ctxt->path);
|
---|
| 1465 |
|
---|
| 1466 | if (ctxt->query != NULL)
|
---|
| 1467 | p += snprintf( p, blen - (p - bp), "?%s", ctxt->query);
|
---|
| 1468 |
|
---|
| 1469 | if (ctxt->port == 80) {
|
---|
| 1470 | p += snprintf( p, blen - (p - bp), " HTTP/1.0\r\nHost: %s\r\n",
|
---|
| 1471 | ctxt->hostname);
|
---|
| 1472 | } else {
|
---|
| 1473 | p += snprintf( p, blen - (p - bp), " HTTP/1.0\r\nHost: %s:%d\r\n",
|
---|
| 1474 | ctxt->hostname, ctxt->port);
|
---|
| 1475 | }
|
---|
| 1476 |
|
---|
| 1477 | #ifdef LIBXML_ZLIB_ENABLED
|
---|
| 1478 | p += snprintf(p, blen - (p - bp), "Accept-Encoding: gzip\r\n");
|
---|
| 1479 | #endif
|
---|
| 1480 |
|
---|
| 1481 | if (contentType != NULL && *contentType)
|
---|
| 1482 | p += snprintf(p, blen - (p - bp), "Content-Type: %s\r\n", *contentType);
|
---|
| 1483 |
|
---|
| 1484 | if (headers != NULL)
|
---|
| 1485 | p += snprintf( p, blen - (p - bp), "%s", headers );
|
---|
| 1486 |
|
---|
| 1487 | if (input != NULL)
|
---|
| 1488 | snprintf(p, blen - (p - bp), "Content-Length: %d\r\n\r\n", ilen );
|
---|
| 1489 | else
|
---|
| 1490 | snprintf(p, blen - (p - bp), "\r\n");
|
---|
| 1491 |
|
---|
| 1492 | ctxt->outptr = ctxt->out = bp;
|
---|
| 1493 | ctxt->state = XML_NANO_HTTP_WRITE;
|
---|
| 1494 | blen = strlen( ctxt->out );
|
---|
| 1495 | xmlNanoHTTPSend(ctxt, ctxt->out, blen );
|
---|
| 1496 |
|
---|
| 1497 | if ( input != NULL ) {
|
---|
| 1498 | xmlNanoHTTPSend( ctxt, input, ilen );
|
---|
| 1499 | }
|
---|
| 1500 |
|
---|
| 1501 | ctxt->state = XML_NANO_HTTP_READ;
|
---|
| 1502 |
|
---|
| 1503 | while ((p = xmlNanoHTTPReadLine(ctxt)) != NULL) {
|
---|
| 1504 | if (*p == 0) {
|
---|
| 1505 | ctxt->content = ctxt->inrptr;
|
---|
| 1506 | xmlFree(p);
|
---|
| 1507 | break;
|
---|
| 1508 | }
|
---|
| 1509 | xmlNanoHTTPScanAnswer(ctxt, p);
|
---|
| 1510 |
|
---|
| 1511 | xmlFree(p);
|
---|
| 1512 | }
|
---|
| 1513 |
|
---|
| 1514 | if ((ctxt->location != NULL) && (ctxt->returnValue >= 300) &&
|
---|
| 1515 | (ctxt->returnValue < 400)) {
|
---|
| 1516 | while ( xmlNanoHTTPRecv(ctxt) > 0 )
|
---|
| 1517 | ;
|
---|
| 1518 | if (nbRedirects < XML_NANO_HTTP_MAX_REDIR) {
|
---|
| 1519 | nbRedirects++;
|
---|
| 1520 | if (redirURL != NULL)
|
---|
| 1521 | xmlFree(redirURL);
|
---|
| 1522 | redirURL = xmlMemStrdup(ctxt->location);
|
---|
| 1523 | xmlNanoHTTPFreeCtxt(ctxt);
|
---|
| 1524 | goto retry;
|
---|
| 1525 | }
|
---|
| 1526 | xmlNanoHTTPFreeCtxt(ctxt);
|
---|
| 1527 | if (redirURL != NULL) xmlFree(redirURL);
|
---|
| 1528 | return(NULL);
|
---|
| 1529 | }
|
---|
| 1530 |
|
---|
| 1531 | if (contentType != NULL) {
|
---|
| 1532 | if (ctxt->contentType != NULL)
|
---|
| 1533 | *contentType = xmlMemStrdup(ctxt->contentType);
|
---|
| 1534 | else
|
---|
| 1535 | *contentType = NULL;
|
---|
| 1536 | }
|
---|
| 1537 |
|
---|
| 1538 | if ((redir != NULL) && (redirURL != NULL)) {
|
---|
| 1539 | *redir = redirURL;
|
---|
| 1540 | } else {
|
---|
| 1541 | if (redirURL != NULL)
|
---|
| 1542 | xmlFree(redirURL);
|
---|
| 1543 | if (redir != NULL)
|
---|
| 1544 | *redir = NULL;
|
---|
| 1545 | }
|
---|
| 1546 |
|
---|
| 1547 | return((void *) ctxt);
|
---|
| 1548 | }
|
---|
| 1549 |
|
---|
| 1550 | /**
|
---|
| 1551 | * xmlNanoHTTPMethod:
|
---|
| 1552 | * @URL: The URL to load
|
---|
| 1553 | * @method: the HTTP method to use
|
---|
| 1554 | * @input: the input string if any
|
---|
| 1555 | * @contentType: the Content-Type information IN and OUT
|
---|
| 1556 | * @headers: the extra headers
|
---|
| 1557 | * @ilen: input length
|
---|
| 1558 | *
|
---|
| 1559 | * This function try to open a connection to the indicated resource
|
---|
| 1560 | * via HTTP using the given @method, adding the given extra headers
|
---|
| 1561 | * and the input buffer for the request content.
|
---|
| 1562 | *
|
---|
| 1563 | * Returns NULL in case of failure, otherwise a request handler.
|
---|
| 1564 | * The contentType, if provided must be freed by the caller
|
---|
| 1565 | */
|
---|
| 1566 |
|
---|
| 1567 | void*
|
---|
| 1568 | xmlNanoHTTPMethod(const char *URL, const char *method, const char *input,
|
---|
| 1569 | char **contentType, const char *headers, int ilen) {
|
---|
| 1570 | return(xmlNanoHTTPMethodRedir(URL, method, input, contentType,
|
---|
| 1571 | NULL, headers, ilen));
|
---|
| 1572 | }
|
---|
| 1573 |
|
---|
| 1574 | /**
|
---|
| 1575 | * xmlNanoHTTPFetch:
|
---|
| 1576 | * @URL: The URL to load
|
---|
| 1577 | * @filename: the filename where the content should be saved
|
---|
| 1578 | * @contentType: if available the Content-Type information will be
|
---|
| 1579 | * returned at that location
|
---|
| 1580 | *
|
---|
| 1581 | * This function try to fetch the indicated resource via HTTP GET
|
---|
| 1582 | * and save it's content in the file.
|
---|
| 1583 | *
|
---|
| 1584 | * Returns -1 in case of failure, 0 in case of success. The contentType,
|
---|
| 1585 | * if provided must be freed by the caller
|
---|
| 1586 | */
|
---|
| 1587 | int
|
---|
| 1588 | xmlNanoHTTPFetch(const char *URL, const char *filename, char **contentType) {
|
---|
| 1589 | void *ctxt = NULL;
|
---|
| 1590 | char *buf = NULL;
|
---|
| 1591 | int fd;
|
---|
| 1592 | int len;
|
---|
| 1593 | int ret = 0;
|
---|
| 1594 |
|
---|
| 1595 | if (filename == NULL) return(-1);
|
---|
| 1596 | ctxt = xmlNanoHTTPOpen(URL, contentType);
|
---|
| 1597 | if (ctxt == NULL) return(-1);
|
---|
| 1598 |
|
---|
| 1599 | if (!strcmp(filename, "-"))
|
---|
| 1600 | fd = 0;
|
---|
| 1601 | else {
|
---|
| 1602 | fd = open(filename, O_CREAT | O_WRONLY, 00644);
|
---|
| 1603 | if (fd < 0) {
|
---|
| 1604 | xmlNanoHTTPClose(ctxt);
|
---|
| 1605 | if ((contentType != NULL) && (*contentType != NULL)) {
|
---|
| 1606 | xmlFree(*contentType);
|
---|
| 1607 | *contentType = NULL;
|
---|
| 1608 | }
|
---|
| 1609 | return(-1);
|
---|
| 1610 | }
|
---|
| 1611 | }
|
---|
| 1612 |
|
---|
| 1613 | xmlNanoHTTPFetchContent( ctxt, &buf, &len );
|
---|
| 1614 | if ( len > 0 ) {
|
---|
| 1615 | if (write(fd, buf, len) == -1) {
|
---|
| 1616 | ret = -1;
|
---|
| 1617 | }
|
---|
| 1618 | }
|
---|
| 1619 |
|
---|
| 1620 | xmlNanoHTTPClose(ctxt);
|
---|
| 1621 | close(fd);
|
---|
| 1622 | return(ret);
|
---|
| 1623 | }
|
---|
| 1624 |
|
---|
| 1625 | #ifdef LIBXML_OUTPUT_ENABLED
|
---|
| 1626 | /**
|
---|
| 1627 | * xmlNanoHTTPSave:
|
---|
| 1628 | * @ctxt: the HTTP context
|
---|
| 1629 | * @filename: the filename where the content should be saved
|
---|
| 1630 | *
|
---|
| 1631 | * This function saves the output of the HTTP transaction to a file
|
---|
| 1632 | * It closes and free the context at the end
|
---|
| 1633 | *
|
---|
| 1634 | * Returns -1 in case of failure, 0 in case of success.
|
---|
| 1635 | */
|
---|
| 1636 | int
|
---|
| 1637 | xmlNanoHTTPSave(void *ctxt, const char *filename) {
|
---|
| 1638 | char *buf = NULL;
|
---|
| 1639 | int fd;
|
---|
| 1640 | int len;
|
---|
| 1641 | int ret = 0;
|
---|
| 1642 |
|
---|
| 1643 | if ((ctxt == NULL) || (filename == NULL)) return(-1);
|
---|
| 1644 |
|
---|
| 1645 | if (!strcmp(filename, "-"))
|
---|
| 1646 | fd = 0;
|
---|
| 1647 | else {
|
---|
| 1648 | fd = open(filename, O_CREAT | O_WRONLY, 0666);
|
---|
| 1649 | if (fd < 0) {
|
---|
| 1650 | xmlNanoHTTPClose(ctxt);
|
---|
| 1651 | return(-1);
|
---|
| 1652 | }
|
---|
| 1653 | }
|
---|
| 1654 |
|
---|
| 1655 | xmlNanoHTTPFetchContent( ctxt, &buf, &len );
|
---|
| 1656 | if ( len > 0 ) {
|
---|
| 1657 | if (write(fd, buf, len) == -1) {
|
---|
| 1658 | ret = -1;
|
---|
| 1659 | }
|
---|
| 1660 | }
|
---|
| 1661 |
|
---|
| 1662 | xmlNanoHTTPClose(ctxt);
|
---|
| 1663 | close(fd);
|
---|
| 1664 | return(ret);
|
---|
| 1665 | }
|
---|
| 1666 | #endif /* LIBXML_OUTPUT_ENABLED */
|
---|
| 1667 |
|
---|
| 1668 | /**
|
---|
| 1669 | * xmlNanoHTTPReturnCode:
|
---|
| 1670 | * @ctx: the HTTP context
|
---|
| 1671 | *
|
---|
| 1672 | * Get the latest HTTP return code received
|
---|
| 1673 | *
|
---|
| 1674 | * Returns the HTTP return code for the request.
|
---|
| 1675 | */
|
---|
| 1676 | int
|
---|
| 1677 | xmlNanoHTTPReturnCode(void *ctx) {
|
---|
| 1678 | xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
|
---|
| 1679 |
|
---|
| 1680 | if (ctxt == NULL) return(-1);
|
---|
| 1681 |
|
---|
| 1682 | return(ctxt->returnValue);
|
---|
| 1683 | }
|
---|
| 1684 |
|
---|
| 1685 | /**
|
---|
| 1686 | * xmlNanoHTTPAuthHeader:
|
---|
| 1687 | * @ctx: the HTTP context
|
---|
| 1688 | *
|
---|
| 1689 | * Get the authentication header of an HTTP context
|
---|
| 1690 | *
|
---|
| 1691 | * Returns the stashed value of the WWW-Authenticate or Proxy-Authenticate
|
---|
| 1692 | * header.
|
---|
| 1693 | */
|
---|
| 1694 | const char *
|
---|
| 1695 | xmlNanoHTTPAuthHeader(void *ctx) {
|
---|
| 1696 | xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
|
---|
| 1697 |
|
---|
| 1698 | if (ctxt == NULL) return(NULL);
|
---|
| 1699 |
|
---|
| 1700 | return(ctxt->authHeader);
|
---|
| 1701 | }
|
---|
| 1702 |
|
---|
| 1703 | /**
|
---|
| 1704 | * xmlNanoHTTPContentLength:
|
---|
| 1705 | * @ctx: the HTTP context
|
---|
| 1706 | *
|
---|
| 1707 | * Provides the specified content length from the HTTP header.
|
---|
| 1708 | *
|
---|
| 1709 | * Return the specified content length from the HTTP header. Note that
|
---|
| 1710 | * a value of -1 indicates that the content length element was not included in
|
---|
| 1711 | * the response header.
|
---|
| 1712 | */
|
---|
| 1713 | int
|
---|
| 1714 | xmlNanoHTTPContentLength( void * ctx ) {
|
---|
| 1715 | xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;
|
---|
| 1716 |
|
---|
| 1717 | return ( ( ctxt == NULL ) ? -1 : ctxt->ContentLength );
|
---|
| 1718 | }
|
---|
| 1719 |
|
---|
| 1720 | /**
|
---|
| 1721 | * xmlNanoHTTPRedir:
|
---|
| 1722 | * @ctx: the HTTP context
|
---|
| 1723 | *
|
---|
| 1724 | * Provides the specified redirection URL if available from the HTTP header.
|
---|
| 1725 | *
|
---|
| 1726 | * Return the specified redirection URL or NULL if not redirected.
|
---|
| 1727 | */
|
---|
| 1728 | const char *
|
---|
| 1729 | xmlNanoHTTPRedir( void * ctx ) {
|
---|
| 1730 | xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;
|
---|
| 1731 |
|
---|
| 1732 | return ( ( ctxt == NULL ) ? NULL : ctxt->location );
|
---|
| 1733 | }
|
---|
| 1734 |
|
---|
| 1735 | /**
|
---|
| 1736 | * xmlNanoHTTPEncoding:
|
---|
| 1737 | * @ctx: the HTTP context
|
---|
| 1738 | *
|
---|
| 1739 | * Provides the specified encoding if specified in the HTTP headers.
|
---|
| 1740 | *
|
---|
| 1741 | * Return the specified encoding or NULL if not available
|
---|
| 1742 | */
|
---|
| 1743 | const char *
|
---|
| 1744 | xmlNanoHTTPEncoding( void * ctx ) {
|
---|
| 1745 | xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;
|
---|
| 1746 |
|
---|
| 1747 | return ( ( ctxt == NULL ) ? NULL : ctxt->encoding );
|
---|
| 1748 | }
|
---|
| 1749 |
|
---|
| 1750 | /**
|
---|
| 1751 | * xmlNanoHTTPMimeType:
|
---|
| 1752 | * @ctx: the HTTP context
|
---|
| 1753 | *
|
---|
| 1754 | * Provides the specified Mime-Type if specified in the HTTP headers.
|
---|
| 1755 | *
|
---|
| 1756 | * Return the specified Mime-Type or NULL if not available
|
---|
| 1757 | */
|
---|
| 1758 | const char *
|
---|
| 1759 | xmlNanoHTTPMimeType( void * ctx ) {
|
---|
| 1760 | xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;
|
---|
| 1761 |
|
---|
| 1762 | return ( ( ctxt == NULL ) ? NULL : ctxt->mimeType );
|
---|
| 1763 | }
|
---|
| 1764 |
|
---|
| 1765 | /**
|
---|
| 1766 | * xmlNanoHTTPFetchContent:
|
---|
| 1767 | * @ctx: the HTTP context
|
---|
| 1768 | * @ptr: pointer to set to the content buffer.
|
---|
| 1769 | * @len: integer pointer to hold the length of the content
|
---|
| 1770 | *
|
---|
| 1771 | * Check if all the content was read
|
---|
| 1772 | *
|
---|
| 1773 | * Returns 0 if all the content was read and available, returns
|
---|
| 1774 | * -1 if received content length was less than specified or an error
|
---|
| 1775 | * occurred.
|
---|
| 1776 | */
|
---|
| 1777 | static int
|
---|
| 1778 | xmlNanoHTTPFetchContent( void * ctx, char ** ptr, int * len ) {
|
---|
| 1779 | xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;
|
---|
| 1780 |
|
---|
| 1781 | int rc = 0;
|
---|
| 1782 | int cur_lgth;
|
---|
| 1783 | int rcvd_lgth;
|
---|
| 1784 | int dummy_int;
|
---|
| 1785 | char * dummy_ptr = NULL;
|
---|
| 1786 |
|
---|
| 1787 | /* Dummy up return input parameters if not provided */
|
---|
| 1788 |
|
---|
| 1789 | if ( len == NULL )
|
---|
| 1790 | len = &dummy_int;
|
---|
| 1791 |
|
---|
| 1792 | if ( ptr == NULL )
|
---|
| 1793 | ptr = &dummy_ptr;
|
---|
| 1794 |
|
---|
| 1795 | /* But can't work without the context pointer */
|
---|
| 1796 |
|
---|
| 1797 | if ( ( ctxt == NULL ) || ( ctxt->content == NULL ) ) {
|
---|
| 1798 | *len = 0;
|
---|
| 1799 | *ptr = NULL;
|
---|
| 1800 | return ( -1 );
|
---|
| 1801 | }
|
---|
| 1802 |
|
---|
| 1803 | rcvd_lgth = ctxt->inptr - ctxt->content;
|
---|
| 1804 |
|
---|
| 1805 | while ( (cur_lgth = xmlNanoHTTPRecv( ctxt )) > 0 ) {
|
---|
| 1806 |
|
---|
| 1807 | rcvd_lgth += cur_lgth;
|
---|
| 1808 | if ( (ctxt->ContentLength > 0) && (rcvd_lgth >= ctxt->ContentLength) )
|
---|
| 1809 | break;
|
---|
| 1810 | }
|
---|
| 1811 |
|
---|
| 1812 | *ptr = ctxt->content;
|
---|
| 1813 | *len = rcvd_lgth;
|
---|
| 1814 |
|
---|
| 1815 | if ( ( ctxt->ContentLength > 0 ) && ( rcvd_lgth < ctxt->ContentLength ) )
|
---|
| 1816 | rc = -1;
|
---|
| 1817 | else if ( rcvd_lgth == 0 )
|
---|
| 1818 | rc = -1;
|
---|
| 1819 |
|
---|
| 1820 | return ( rc );
|
---|
| 1821 | }
|
---|
| 1822 |
|
---|
| 1823 | #ifdef STANDALONE
|
---|
| 1824 | int main(int argc, char **argv) {
|
---|
| 1825 | char *contentType = NULL;
|
---|
| 1826 |
|
---|
| 1827 | if (argv[1] != NULL) {
|
---|
| 1828 | if (argv[2] != NULL)
|
---|
| 1829 | xmlNanoHTTPFetch(argv[1], argv[2], &contentType);
|
---|
| 1830 | else
|
---|
| 1831 | xmlNanoHTTPFetch(argv[1], "-", &contentType);
|
---|
| 1832 | if (contentType != NULL) xmlFree(contentType);
|
---|
| 1833 | } else {
|
---|
| 1834 | xmlGenericError(xmlGenericErrorContext,
|
---|
| 1835 | "%s: minimal HTTP GET implementation\n", argv[0]);
|
---|
| 1836 | xmlGenericError(xmlGenericErrorContext,
|
---|
| 1837 | "\tusage %s [ URL [ filename ] ]\n", argv[0]);
|
---|
| 1838 | }
|
---|
| 1839 | xmlNanoHTTPCleanup();
|
---|
| 1840 | return(0);
|
---|
| 1841 | }
|
---|
| 1842 | #endif /* STANDALONE */
|
---|
| 1843 | #else /* !LIBXML_HTTP_ENABLED */
|
---|
| 1844 | #ifdef STANDALONE
|
---|
| 1845 | #include <stdio.h>
|
---|
| 1846 | int main(int argc, char **argv) {
|
---|
| 1847 | xmlGenericError(xmlGenericErrorContext,
|
---|
| 1848 | "%s : HTTP support not compiled in\n", argv[0]);
|
---|
| 1849 | return(0);
|
---|
| 1850 | }
|
---|
| 1851 | #endif /* STANDALONE */
|
---|
| 1852 | #endif /* LIBXML_HTTP_ENABLED */
|
---|