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1900 lines
47 KiB
1900 lines
47 KiB
/*
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* nanohttp.c: minimalist HTTP GET implementation to fetch external subsets.
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* focuses on size, streamability, reentrancy and portability
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*
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* This is clearly not a general purpose HTTP implementation
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* If you look for one, check:
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* http://www.w3.org/Library/
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*
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* See Copyright for the status of this software.
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*
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* daniel@veillard.com
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*/
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#define IN_LIBXML
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#include "libxml.h"
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#ifdef LIBXML_HTTP_ENABLED
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#include <string.h>
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#ifdef HAVE_RESOLV_H
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#ifdef HAVE_ARPA_NAMESER_H
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#include <arpa/nameser.h>
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#endif
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#include <resolv.h>
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#ifndef HAVE_POLL_H
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#else
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#include <poll.h>
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#endif
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#ifdef LIBXML_ZLIB_ENABLED
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#include <zlib.h>
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#endif
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#ifdef VMS
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#include <stropts>
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#define XML_SOCKLEN_T unsigned int
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#endif
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#if defined(_WIN32) && !defined(__CYGWIN__)
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#include <wsockcompat.h>
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#endif
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#include <libxml/globals.h>
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#include <libxml/xmlerror.h>
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#include <libxml/xmlmemory.h>
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#include <libxml/parser.h> /* for xmlStr(n)casecmp() */
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#include <libxml/nanohttp.h>
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#include <libxml/globals.h>
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#include <libxml/uri.h>
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/**
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* A couple portability macros
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*/
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#ifndef _WINSOCKAPI_
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#if !defined(__BEOS__) || defined(__HAIKU__)
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#define closesocket(s) close(s)
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#endif
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#define SOCKET int
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#define INVALID_SOCKET (-1)
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#endif
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#ifdef __BEOS__
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#ifndef PF_INET
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#define PF_INET AF_INET
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#endif
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#endif
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#ifndef XML_SOCKLEN_T
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#define XML_SOCKLEN_T unsigned int
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#endif
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#ifdef STANDALONE
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#define DEBUG_HTTP
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#define xmlStrncasecmp(a, b, n) strncasecmp((char *)a, (char *)b, n)
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#define xmlStrcasecmpi(a, b) strcasecmp((char *)a, (char *)b)
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#endif
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#define XML_NANO_HTTP_MAX_REDIR 10
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#define XML_NANO_HTTP_CHUNK 4096
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#define XML_NANO_HTTP_CLOSED 0
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#define XML_NANO_HTTP_WRITE 1
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#define XML_NANO_HTTP_READ 2
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#define XML_NANO_HTTP_NONE 4
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typedef struct xmlNanoHTTPCtxt {
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char *protocol; /* the protocol name */
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char *hostname; /* the host name */
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int port; /* the port */
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char *path; /* the path within the URL */
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char *query; /* the query string */
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SOCKET fd; /* the file descriptor for the socket */
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int state; /* WRITE / READ / CLOSED */
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char *out; /* buffer sent (zero terminated) */
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char *outptr; /* index within the buffer sent */
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char *in; /* the receiving buffer */
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char *content; /* the start of the content */
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char *inptr; /* the next byte to read from network */
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char *inrptr; /* the next byte to give back to the client */
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int inlen; /* len of the input buffer */
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int last; /* return code for last operation */
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int returnValue; /* the protocol return value */
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int version; /* the protocol version */
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int ContentLength; /* specified content length from HTTP header */
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char *contentType; /* the MIME type for the input */
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char *location; /* the new URL in case of redirect */
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char *authHeader; /* contents of {WWW,Proxy}-Authenticate header */
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char *encoding; /* encoding extracted from the contentType */
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char *mimeType; /* Mime-Type extracted from the contentType */
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#ifdef LIBXML_ZLIB_ENABLED
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z_stream *strm; /* Zlib stream object */
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int usesGzip; /* "Content-Encoding: gzip" was detected */
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#endif
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} xmlNanoHTTPCtxt, *xmlNanoHTTPCtxtPtr;
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static int initialized = 0;
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static char *proxy = NULL; /* the proxy name if any */
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static int proxyPort; /* the proxy port if any */
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static unsigned int timeout = 60;/* the select() timeout in seconds */
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static int xmlNanoHTTPFetchContent( void * ctx, char ** ptr, int * len );
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/**
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* xmlHTTPErrMemory:
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* @extra: extra information
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*
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* Handle an out of memory condition
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*/
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static void
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xmlHTTPErrMemory(const char *extra)
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{
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__xmlSimpleError(XML_FROM_HTTP, XML_ERR_NO_MEMORY, NULL, NULL, extra);
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}
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/**
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* A portability function
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*/
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static int socket_errno(void) {
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#ifdef _WINSOCKAPI_
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int err = WSAGetLastError();
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switch(err) {
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case WSAECONNRESET:
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return(ECONNRESET);
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case WSAEINPROGRESS:
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return(EINPROGRESS);
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case WSAEINTR:
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return(EINTR);
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case WSAESHUTDOWN:
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return(ESHUTDOWN);
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case WSAEWOULDBLOCK:
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return(EWOULDBLOCK);
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default:
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return(err);
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}
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#else
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return(errno);
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#endif
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}
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#ifdef SUPPORT_IP6
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static
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int have_ipv6(void) {
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SOCKET s;
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s = socket (AF_INET6, SOCK_STREAM, 0);
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if (s != INVALID_SOCKET) {
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close (s);
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return (1);
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}
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return (0);
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}
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#endif
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/**
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* xmlNanoHTTPInit:
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*
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* Initialize the HTTP protocol layer.
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* Currently it just checks for proxy information
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*/
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void
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xmlNanoHTTPInit(void) {
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const char *env;
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#ifdef _WINSOCKAPI_
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WSADATA wsaData;
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#endif
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if (initialized)
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return;
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#ifdef _WINSOCKAPI_
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if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0)
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return;
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#endif
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if (proxy == NULL) {
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proxyPort = 80;
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env = getenv("no_proxy");
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if (env && ((env[0] == '*') && (env[1] == 0)))
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goto done;
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env = getenv("http_proxy");
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if (env != NULL) {
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xmlNanoHTTPScanProxy(env);
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goto done;
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}
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env = getenv("HTTP_PROXY");
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if (env != NULL) {
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xmlNanoHTTPScanProxy(env);
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goto done;
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}
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}
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done:
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initialized = 1;
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}
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/**
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* xmlNanoHTTPCleanup:
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*
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* Cleanup the HTTP protocol layer.
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*/
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void
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xmlNanoHTTPCleanup(void) {
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if (proxy != NULL) {
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xmlFree(proxy);
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proxy = NULL;
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}
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#ifdef _WINSOCKAPI_
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if (initialized)
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WSACleanup();
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#endif
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initialized = 0;
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return;
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}
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/**
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* xmlNanoHTTPScanURL:
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* @ctxt: an HTTP context
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* @URL: The URL used to initialize the context
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*
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* (Re)Initialize an HTTP context by parsing the URL and finding
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* the protocol host port and path it indicates.
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*/
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static void
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xmlNanoHTTPScanURL(xmlNanoHTTPCtxtPtr ctxt, const char *URL) {
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xmlURIPtr uri;
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int len;
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/*
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* Clear any existing data from the context
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*/
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if (ctxt->protocol != NULL) {
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xmlFree(ctxt->protocol);
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ctxt->protocol = NULL;
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}
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if (ctxt->hostname != NULL) {
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xmlFree(ctxt->hostname);
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ctxt->hostname = NULL;
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}
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if (ctxt->path != NULL) {
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xmlFree(ctxt->path);
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ctxt->path = NULL;
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}
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if (ctxt->query != NULL) {
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xmlFree(ctxt->query);
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ctxt->query = NULL;
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}
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if (URL == NULL) return;
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uri = xmlParseURIRaw(URL, 1);
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if (uri == NULL)
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return;
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if ((uri->scheme == NULL) || (uri->server == NULL)) {
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xmlFreeURI(uri);
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return;
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}
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ctxt->protocol = xmlMemStrdup(uri->scheme);
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/* special case of IPv6 addresses, the [] need to be removed */
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if ((uri->server != NULL) && (*uri->server == '[')) {
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len = strlen(uri->server);
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if ((len > 2) && (uri->server[len - 1] == ']')) {
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ctxt->hostname = (char *) xmlCharStrndup(uri->server + 1, len -2);
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} else
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ctxt->hostname = xmlMemStrdup(uri->server);
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} else
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ctxt->hostname = xmlMemStrdup(uri->server);
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if (uri->path != NULL)
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ctxt->path = xmlMemStrdup(uri->path);
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else
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ctxt->path = xmlMemStrdup("/");
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if (uri->query != NULL)
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ctxt->query = xmlMemStrdup(uri->query);
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if (uri->port != 0)
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ctxt->port = uri->port;
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xmlFreeURI(uri);
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}
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/**
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* xmlNanoHTTPScanProxy:
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* @URL: The proxy URL used to initialize the proxy context
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*
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* (Re)Initialize the HTTP Proxy context by parsing the URL and finding
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* the protocol host port it indicates.
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* Should be like http://myproxy/ or http://myproxy:3128/
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* A NULL URL cleans up proxy information.
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*/
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void
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xmlNanoHTTPScanProxy(const char *URL) {
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xmlURIPtr uri;
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if (proxy != NULL) {
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xmlFree(proxy);
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proxy = NULL;
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}
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proxyPort = 0;
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#ifdef DEBUG_HTTP
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if (URL == NULL)
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xmlGenericError(xmlGenericErrorContext,
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"Removing HTTP proxy info\n");
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else
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xmlGenericError(xmlGenericErrorContext,
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"Using HTTP proxy %s\n", URL);
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#endif
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if (URL == NULL) return;
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uri = xmlParseURIRaw(URL, 1);
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if ((uri == NULL) || (uri->scheme == NULL) ||
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(strcmp(uri->scheme, "http")) || (uri->server == NULL)) {
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__xmlIOErr(XML_FROM_HTTP, XML_HTTP_URL_SYNTAX, "Syntax Error\n");
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if (uri != NULL)
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xmlFreeURI(uri);
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return;
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}
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proxy = xmlMemStrdup(uri->server);
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if (uri->port != 0)
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proxyPort = uri->port;
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xmlFreeURI(uri);
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}
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/**
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* xmlNanoHTTPNewCtxt:
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* @URL: The URL used to initialize the context
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*
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* Allocate and initialize a new HTTP context.
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*
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* Returns an HTTP context or NULL in case of error.
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*/
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static xmlNanoHTTPCtxtPtr
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xmlNanoHTTPNewCtxt(const char *URL) {
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xmlNanoHTTPCtxtPtr ret;
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ret = (xmlNanoHTTPCtxtPtr) xmlMalloc(sizeof(xmlNanoHTTPCtxt));
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if (ret == NULL) {
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xmlHTTPErrMemory("allocating context");
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return(NULL);
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}
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memset(ret, 0, sizeof(xmlNanoHTTPCtxt));
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ret->port = 80;
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ret->returnValue = 0;
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ret->fd = INVALID_SOCKET;
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ret->ContentLength = -1;
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xmlNanoHTTPScanURL(ret, URL);
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return(ret);
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}
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/**
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* xmlNanoHTTPFreeCtxt:
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* @ctxt: an HTTP context
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*
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* Frees the context after closing the connection.
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*/
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static void
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xmlNanoHTTPFreeCtxt(xmlNanoHTTPCtxtPtr ctxt) {
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if (ctxt == NULL) return;
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if (ctxt->hostname != NULL) xmlFree(ctxt->hostname);
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if (ctxt->protocol != NULL) xmlFree(ctxt->protocol);
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if (ctxt->path != NULL) xmlFree(ctxt->path);
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if (ctxt->query != NULL) xmlFree(ctxt->query);
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if (ctxt->out != NULL) xmlFree(ctxt->out);
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if (ctxt->in != NULL) xmlFree(ctxt->in);
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if (ctxt->contentType != NULL) xmlFree(ctxt->contentType);
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if (ctxt->encoding != NULL) xmlFree(ctxt->encoding);
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if (ctxt->mimeType != NULL) xmlFree(ctxt->mimeType);
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if (ctxt->location != NULL) xmlFree(ctxt->location);
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if (ctxt->authHeader != NULL) xmlFree(ctxt->authHeader);
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#ifdef LIBXML_ZLIB_ENABLED
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if (ctxt->strm != NULL) {
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inflateEnd(ctxt->strm);
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xmlFree(ctxt->strm);
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}
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#endif
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ctxt->state = XML_NANO_HTTP_NONE;
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if (ctxt->fd != INVALID_SOCKET) closesocket(ctxt->fd);
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ctxt->fd = INVALID_SOCKET;
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xmlFree(ctxt);
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}
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/**
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* xmlNanoHTTPSend:
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* @ctxt: an HTTP context
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*
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* Send the input needed to initiate the processing on the server side
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* Returns number of bytes sent or -1 on error.
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*/
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static int
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xmlNanoHTTPSend(xmlNanoHTTPCtxtPtr ctxt, const char *xmt_ptr, int outlen)
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{
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int total_sent = 0;
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#ifdef HAVE_POLL_H
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struct pollfd p;
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#else
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struct timeval tv;
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fd_set wfd;
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#endif
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if ((ctxt->state & XML_NANO_HTTP_WRITE) && (xmt_ptr != NULL)) {
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while (total_sent < outlen) {
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int nsent = send(ctxt->fd, SEND_ARG2_CAST (xmt_ptr + total_sent),
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outlen - total_sent, 0);
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if (nsent > 0)
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total_sent += nsent;
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else if ((nsent == -1) &&
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#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
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(socket_errno() != EAGAIN) &&
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#endif
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(socket_errno() != EWOULDBLOCK)) {
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__xmlIOErr(XML_FROM_HTTP, 0, "send failed\n");
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if (total_sent == 0)
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total_sent = -1;
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break;
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} else {
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/*
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* No data sent
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* Since non-blocking sockets are used, wait for
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* socket to be writable or default timeout prior
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* to retrying.
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*/
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#ifndef HAVE_POLL_H
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#ifndef _WINSOCKAPI_
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if (ctxt->fd > FD_SETSIZE)
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return -1;
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#endif
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tv.tv_sec = timeout;
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tv.tv_usec = 0;
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FD_ZERO(&wfd);
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#ifdef _MSC_VER
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#pragma warning(push)
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#pragma warning(disable: 4018)
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|
#endif
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|
FD_SET(ctxt->fd, &wfd);
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif
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(void) select(ctxt->fd + 1, NULL, &wfd, NULL, &tv);
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#else
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p.fd = ctxt->fd;
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p.events = POLLOUT;
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(void) poll(&p, 1, timeout * 1000);
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#endif /* !HAVE_POLL_H */
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}
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}
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}
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return total_sent;
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}
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|
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/**
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* xmlNanoHTTPRecv:
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* @ctxt: an HTTP context
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*
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* Read information coming from the HTTP connection.
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* This is a blocking call (but it blocks in select(), not read()).
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*
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* Returns the number of byte read or -1 in case of error.
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*/
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static int
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xmlNanoHTTPRecv(xmlNanoHTTPCtxtPtr ctxt)
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{
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#ifdef HAVE_POLL_H
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struct pollfd p;
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|
#else
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fd_set rfd;
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struct timeval tv;
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|
#endif
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|
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while (ctxt->state & XML_NANO_HTTP_READ) {
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if (ctxt->in == NULL) {
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ctxt->in = (char *) xmlMallocAtomic(65000 * sizeof(char));
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|
if (ctxt->in == NULL) {
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xmlHTTPErrMemory("allocating input");
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ctxt->last = -1;
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return (-1);
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}
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ctxt->inlen = 65000;
|
|
ctxt->inptr = ctxt->content = ctxt->inrptr = ctxt->in;
|
|
}
|
|
if (ctxt->inrptr > ctxt->in + XML_NANO_HTTP_CHUNK) {
|
|
int delta = ctxt->inrptr - ctxt->in;
|
|
int len = ctxt->inptr - ctxt->inrptr;
|
|
|
|
memmove(ctxt->in, ctxt->inrptr, len);
|
|
ctxt->inrptr -= delta;
|
|
ctxt->content -= delta;
|
|
ctxt->inptr -= delta;
|
|
}
|
|
if ((ctxt->in + ctxt->inlen) < (ctxt->inptr + XML_NANO_HTTP_CHUNK)) {
|
|
int d_inptr = ctxt->inptr - ctxt->in;
|
|
int d_content = ctxt->content - ctxt->in;
|
|
int d_inrptr = ctxt->inrptr - ctxt->in;
|
|
char *tmp_ptr = ctxt->in;
|
|
|
|
ctxt->inlen *= 2;
|
|
ctxt->in = (char *) xmlRealloc(tmp_ptr, ctxt->inlen);
|
|
if (ctxt->in == NULL) {
|
|
xmlHTTPErrMemory("allocating input buffer");
|
|
xmlFree(tmp_ptr);
|
|
ctxt->last = -1;
|
|
return (-1);
|
|
}
|
|
ctxt->inptr = ctxt->in + d_inptr;
|
|
ctxt->content = ctxt->in + d_content;
|
|
ctxt->inrptr = ctxt->in + d_inrptr;
|
|
}
|
|
ctxt->last = recv(ctxt->fd, ctxt->inptr, XML_NANO_HTTP_CHUNK, 0);
|
|
if (ctxt->last > 0) {
|
|
ctxt->inptr += ctxt->last;
|
|
return (ctxt->last);
|
|
}
|
|
if (ctxt->last == 0) {
|
|
return (0);
|
|
}
|
|
if (ctxt->last == -1) {
|
|
switch (socket_errno()) {
|
|
case EINPROGRESS:
|
|
case EWOULDBLOCK:
|
|
#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
|
|
case EAGAIN:
|
|
#endif
|
|
break;
|
|
|
|
case ECONNRESET:
|
|
case ESHUTDOWN:
|
|
return (0);
|
|
|
|
default:
|
|
__xmlIOErr(XML_FROM_HTTP, 0, "recv failed\n");
|
|
return (-1);
|
|
}
|
|
}
|
|
#ifdef HAVE_POLL_H
|
|
p.fd = ctxt->fd;
|
|
p.events = POLLIN;
|
|
if ((poll(&p, 1, timeout * 1000) < 1)
|
|
#if defined(EINTR)
|
|
&& (errno != EINTR)
|
|
#endif
|
|
)
|
|
return (0);
|
|
#else /* !HAVE_POLL_H */
|
|
#ifndef _WINSOCKAPI_
|
|
if (ctxt->fd > FD_SETSIZE)
|
|
return 0;
|
|
#endif
|
|
|
|
tv.tv_sec = timeout;
|
|
tv.tv_usec = 0;
|
|
FD_ZERO(&rfd);
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma warning(push)
|
|
#pragma warning(disable: 4018)
|
|
#endif
|
|
|
|
FD_SET(ctxt->fd, &rfd);
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma warning(pop)
|
|
#endif
|
|
|
|
if ((select(ctxt->fd + 1, &rfd, NULL, NULL, &tv) < 1)
|
|
#if defined(EINTR)
|
|
&& (socket_errno() != EINTR)
|
|
#endif
|
|
)
|
|
return (0);
|
|
#endif /* !HAVE_POLL_H */
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/**
|
|
* xmlNanoHTTPReadLine:
|
|
* @ctxt: an HTTP context
|
|
*
|
|
* Read one line in the HTTP server output, usually for extracting
|
|
* the HTTP protocol information from the answer header.
|
|
*
|
|
* Returns a newly allocated string with a copy of the line, or NULL
|
|
* which indicate the end of the input.
|
|
*/
|
|
|
|
static char *
|
|
xmlNanoHTTPReadLine(xmlNanoHTTPCtxtPtr ctxt) {
|
|
char buf[4096];
|
|
char *bp = buf;
|
|
int rc;
|
|
|
|
while (bp - buf < 4095) {
|
|
if (ctxt->inrptr == ctxt->inptr) {
|
|
if ( (rc = xmlNanoHTTPRecv(ctxt)) == 0) {
|
|
if (bp == buf)
|
|
return(NULL);
|
|
else
|
|
*bp = 0;
|
|
return(xmlMemStrdup(buf));
|
|
}
|
|
else if ( rc == -1 ) {
|
|
return ( NULL );
|
|
}
|
|
}
|
|
*bp = *ctxt->inrptr++;
|
|
if (*bp == '\n') {
|
|
*bp = 0;
|
|
return(xmlMemStrdup(buf));
|
|
}
|
|
if (*bp != '\r')
|
|
bp++;
|
|
}
|
|
buf[4095] = 0;
|
|
return(xmlMemStrdup(buf));
|
|
}
|
|
|
|
|
|
/**
|
|
* xmlNanoHTTPScanAnswer:
|
|
* @ctxt: an HTTP context
|
|
* @line: an HTTP header line
|
|
*
|
|
* Try to extract useful information from the server answer.
|
|
* We currently parse and process:
|
|
* - The HTTP revision/ return code
|
|
* - The Content-Type, Mime-Type and charset used
|
|
* - The Location for redirect processing.
|
|
*
|
|
* Returns -1 in case of failure, the file descriptor number otherwise
|
|
*/
|
|
|
|
static void
|
|
xmlNanoHTTPScanAnswer(xmlNanoHTTPCtxtPtr ctxt, const char *line) {
|
|
const char *cur = line;
|
|
|
|
if (line == NULL) return;
|
|
|
|
if (!strncmp(line, "HTTP/", 5)) {
|
|
int version = 0;
|
|
int ret = 0;
|
|
|
|
cur += 5;
|
|
while ((*cur >= '0') && (*cur <= '9')) {
|
|
version *= 10;
|
|
version += *cur - '0';
|
|
cur++;
|
|
}
|
|
if (*cur == '.') {
|
|
cur++;
|
|
if ((*cur >= '0') && (*cur <= '9')) {
|
|
version *= 10;
|
|
version += *cur - '0';
|
|
cur++;
|
|
}
|
|
while ((*cur >= '0') && (*cur <= '9'))
|
|
cur++;
|
|
} else
|
|
version *= 10;
|
|
if ((*cur != ' ') && (*cur != '\t')) return;
|
|
while ((*cur == ' ') || (*cur == '\t')) cur++;
|
|
if ((*cur < '0') || (*cur > '9')) return;
|
|
while ((*cur >= '0') && (*cur <= '9')) {
|
|
ret *= 10;
|
|
ret += *cur - '0';
|
|
cur++;
|
|
}
|
|
if ((*cur != 0) && (*cur != ' ') && (*cur != '\t')) return;
|
|
ctxt->returnValue = ret;
|
|
ctxt->version = version;
|
|
} else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Content-Type:", 13)) {
|
|
const xmlChar *charset, *last, *mime;
|
|
cur += 13;
|
|
while ((*cur == ' ') || (*cur == '\t')) cur++;
|
|
if (ctxt->contentType != NULL)
|
|
xmlFree(ctxt->contentType);
|
|
ctxt->contentType = xmlMemStrdup(cur);
|
|
mime = (const xmlChar *) cur;
|
|
last = mime;
|
|
while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
|
|
(*last != ';') && (*last != ','))
|
|
last++;
|
|
if (ctxt->mimeType != NULL)
|
|
xmlFree(ctxt->mimeType);
|
|
ctxt->mimeType = (char *) xmlStrndup(mime, last - mime);
|
|
charset = xmlStrstr(BAD_CAST ctxt->contentType, BAD_CAST "charset=");
|
|
if (charset != NULL) {
|
|
charset += 8;
|
|
last = charset;
|
|
while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
|
|
(*last != ';') && (*last != ','))
|
|
last++;
|
|
if (ctxt->encoding != NULL)
|
|
xmlFree(ctxt->encoding);
|
|
ctxt->encoding = (char *) xmlStrndup(charset, last - charset);
|
|
}
|
|
} else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"ContentType:", 12)) {
|
|
const xmlChar *charset, *last, *mime;
|
|
cur += 12;
|
|
if (ctxt->contentType != NULL) return;
|
|
while ((*cur == ' ') || (*cur == '\t')) cur++;
|
|
ctxt->contentType = xmlMemStrdup(cur);
|
|
mime = (const xmlChar *) cur;
|
|
last = mime;
|
|
while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
|
|
(*last != ';') && (*last != ','))
|
|
last++;
|
|
if (ctxt->mimeType != NULL)
|
|
xmlFree(ctxt->mimeType);
|
|
ctxt->mimeType = (char *) xmlStrndup(mime, last - mime);
|
|
charset = xmlStrstr(BAD_CAST ctxt->contentType, BAD_CAST "charset=");
|
|
if (charset != NULL) {
|
|
charset += 8;
|
|
last = charset;
|
|
while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
|
|
(*last != ';') && (*last != ','))
|
|
last++;
|
|
if (ctxt->encoding != NULL)
|
|
xmlFree(ctxt->encoding);
|
|
ctxt->encoding = (char *) xmlStrndup(charset, last - charset);
|
|
}
|
|
} else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Location:", 9)) {
|
|
cur += 9;
|
|
while ((*cur == ' ') || (*cur == '\t')) cur++;
|
|
if (ctxt->location != NULL)
|
|
xmlFree(ctxt->location);
|
|
if (*cur == '/') {
|
|
xmlChar *tmp_http = xmlStrdup(BAD_CAST "http://");
|
|
xmlChar *tmp_loc =
|
|
xmlStrcat(tmp_http, (const xmlChar *) ctxt->hostname);
|
|
ctxt->location =
|
|
(char *) xmlStrcat (tmp_loc, (const xmlChar *) cur);
|
|
} else {
|
|
ctxt->location = xmlMemStrdup(cur);
|
|
}
|
|
} else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"WWW-Authenticate:", 17)) {
|
|
cur += 17;
|
|
while ((*cur == ' ') || (*cur == '\t')) cur++;
|
|
if (ctxt->authHeader != NULL)
|
|
xmlFree(ctxt->authHeader);
|
|
ctxt->authHeader = xmlMemStrdup(cur);
|
|
} else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Proxy-Authenticate:", 19)) {
|
|
cur += 19;
|
|
while ((*cur == ' ') || (*cur == '\t')) cur++;
|
|
if (ctxt->authHeader != NULL)
|
|
xmlFree(ctxt->authHeader);
|
|
ctxt->authHeader = xmlMemStrdup(cur);
|
|
#ifdef LIBXML_ZLIB_ENABLED
|
|
} else if ( !xmlStrncasecmp( BAD_CAST line, BAD_CAST"Content-Encoding:", 17) ) {
|
|
cur += 17;
|
|
while ((*cur == ' ') || (*cur == '\t')) cur++;
|
|
if ( !xmlStrncasecmp( BAD_CAST cur, BAD_CAST"gzip", 4) ) {
|
|
ctxt->usesGzip = 1;
|
|
|
|
ctxt->strm = xmlMalloc(sizeof(z_stream));
|
|
|
|
if (ctxt->strm != NULL) {
|
|
ctxt->strm->zalloc = Z_NULL;
|
|
ctxt->strm->zfree = Z_NULL;
|
|
ctxt->strm->opaque = Z_NULL;
|
|
ctxt->strm->avail_in = 0;
|
|
ctxt->strm->next_in = Z_NULL;
|
|
|
|
inflateInit2( ctxt->strm, 31 );
|
|
}
|
|
}
|
|
#endif
|
|
} else if ( !xmlStrncasecmp( BAD_CAST line, BAD_CAST"Content-Length:", 15) ) {
|
|
cur += 15;
|
|
ctxt->ContentLength = strtol( cur, NULL, 10 );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* xmlNanoHTTPConnectAttempt:
|
|
* @addr: a socket address structure
|
|
*
|
|
* Attempt a connection to the given IP:port endpoint. It forces
|
|
* non-blocking semantic on the socket, and allow 60 seconds for
|
|
* the host to answer.
|
|
*
|
|
* Returns -1 in case of failure, the file descriptor number otherwise
|
|
*/
|
|
|
|
static SOCKET
|
|
xmlNanoHTTPConnectAttempt(struct sockaddr *addr)
|
|
{
|
|
#ifndef HAVE_POLL_H
|
|
fd_set wfd;
|
|
#ifdef _WINSOCKAPI_
|
|
fd_set xfd;
|
|
#endif
|
|
struct timeval tv;
|
|
#else /* !HAVE_POLL_H */
|
|
struct pollfd p;
|
|
#endif /* !HAVE_POLL_H */
|
|
int status;
|
|
|
|
int addrlen;
|
|
|
|
SOCKET s;
|
|
|
|
#ifdef SUPPORT_IP6
|
|
if (addr->sa_family == AF_INET6) {
|
|
s = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP);
|
|
addrlen = sizeof(struct sockaddr_in6);
|
|
} else
|
|
#endif
|
|
{
|
|
s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
|
|
addrlen = sizeof(struct sockaddr_in);
|
|
}
|
|
if (s == INVALID_SOCKET) {
|
|
#ifdef DEBUG_HTTP
|
|
perror("socket");
|
|
#endif
|
|
__xmlIOErr(XML_FROM_HTTP, 0, "socket failed\n");
|
|
return INVALID_SOCKET;
|
|
}
|
|
#ifdef _WINSOCKAPI_
|
|
{
|
|
u_long one = 1;
|
|
|
|
status = ioctlsocket(s, FIONBIO, &one) == SOCKET_ERROR ? -1 : 0;
|
|
}
|
|
#else /* _WINSOCKAPI_ */
|
|
#if defined(VMS)
|
|
{
|
|
int enable = 1;
|
|
|
|
status = ioctl(s, FIONBIO, &enable);
|
|
}
|
|
#else /* VMS */
|
|
#if defined(__BEOS__) && !defined(__HAIKU__)
|
|
{
|
|
bool noblock = true;
|
|
|
|
status =
|
|
setsockopt(s, SOL_SOCKET, SO_NONBLOCK, &noblock,
|
|
sizeof(noblock));
|
|
}
|
|
#else /* __BEOS__ */
|
|
if ((status = fcntl(s, F_GETFL, 0)) != -1) {
|
|
#ifdef O_NONBLOCK
|
|
status |= O_NONBLOCK;
|
|
#else /* O_NONBLOCK */
|
|
#ifdef F_NDELAY
|
|
status |= F_NDELAY;
|
|
#endif /* F_NDELAY */
|
|
#endif /* !O_NONBLOCK */
|
|
status = fcntl(s, F_SETFL, status);
|
|
}
|
|
if (status < 0) {
|
|
#ifdef DEBUG_HTTP
|
|
perror("nonblocking");
|
|
#endif
|
|
__xmlIOErr(XML_FROM_HTTP, 0, "error setting non-blocking IO\n");
|
|
closesocket(s);
|
|
return INVALID_SOCKET;
|
|
}
|
|
#endif /* !__BEOS__ */
|
|
#endif /* !VMS */
|
|
#endif /* !_WINSOCKAPI_ */
|
|
|
|
if (connect(s, addr, addrlen) == -1) {
|
|
switch (socket_errno()) {
|
|
case EINPROGRESS:
|
|
case EWOULDBLOCK:
|
|
break;
|
|
default:
|
|
__xmlIOErr(XML_FROM_HTTP, 0,
|
|
"error connecting to HTTP server");
|
|
closesocket(s);
|
|
return INVALID_SOCKET;
|
|
}
|
|
}
|
|
#ifndef HAVE_POLL_H
|
|
tv.tv_sec = timeout;
|
|
tv.tv_usec = 0;
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma warning(push)
|
|
#pragma warning(disable: 4018)
|
|
#endif
|
|
#ifndef _WINSOCKAPI_
|
|
if (s > FD_SETSIZE)
|
|
return INVALID_SOCKET;
|
|
#endif
|
|
FD_ZERO(&wfd);
|
|
FD_SET(s, &wfd);
|
|
|
|
#ifdef _WINSOCKAPI_
|
|
FD_ZERO(&xfd);
|
|
FD_SET(s, &xfd);
|
|
|
|
switch (select(s + 1, NULL, &wfd, &xfd, &tv))
|
|
#else
|
|
switch (select(s + 1, NULL, &wfd, NULL, &tv))
|
|
#endif
|
|
#ifdef _MSC_VER
|
|
#pragma warning(pop)
|
|
#endif
|
|
|
|
#else /* !HAVE_POLL_H */
|
|
p.fd = s;
|
|
p.events = POLLOUT;
|
|
switch (poll(&p, 1, timeout * 1000))
|
|
#endif /* !HAVE_POLL_H */
|
|
|
|
{
|
|
case 0:
|
|
/* Time out */
|
|
__xmlIOErr(XML_FROM_HTTP, 0, "Connect attempt timed out");
|
|
closesocket(s);
|
|
return INVALID_SOCKET;
|
|
case -1:
|
|
/* Ermm.. ?? */
|
|
__xmlIOErr(XML_FROM_HTTP, 0, "Connect failed");
|
|
closesocket(s);
|
|
return INVALID_SOCKET;
|
|
}
|
|
|
|
#ifndef HAVE_POLL_H
|
|
if (FD_ISSET(s, &wfd)
|
|
#ifdef _WINSOCKAPI_
|
|
|| FD_ISSET(s, &xfd)
|
|
#endif
|
|
)
|
|
#else /* !HAVE_POLL_H */
|
|
if (p.revents == POLLOUT)
|
|
#endif /* !HAVE_POLL_H */
|
|
{
|
|
XML_SOCKLEN_T len;
|
|
|
|
len = sizeof(status);
|
|
#ifdef SO_ERROR
|
|
if (getsockopt(s, SOL_SOCKET, SO_ERROR, (char *) &status, &len) <
|
|
0) {
|
|
/* Solaris error code */
|
|
__xmlIOErr(XML_FROM_HTTP, 0, "getsockopt failed\n");
|
|
closesocket(s);
|
|
return INVALID_SOCKET;
|
|
}
|
|
#endif
|
|
if (status) {
|
|
__xmlIOErr(XML_FROM_HTTP, 0,
|
|
"Error connecting to remote host");
|
|
closesocket(s);
|
|
errno = status;
|
|
return INVALID_SOCKET;
|
|
}
|
|
} else {
|
|
/* pbm */
|
|
__xmlIOErr(XML_FROM_HTTP, 0, "select failed\n");
|
|
closesocket(s);
|
|
return INVALID_SOCKET;
|
|
}
|
|
|
|
return (s);
|
|
}
|
|
|
|
/**
|
|
* xmlNanoHTTPConnectHost:
|
|
* @host: the host name
|
|
* @port: the port number
|
|
*
|
|
* Attempt a connection to the given host:port endpoint. It tries
|
|
* the multiple IP provided by the DNS if available.
|
|
*
|
|
* Returns -1 in case of failure, the file descriptor number otherwise
|
|
*/
|
|
|
|
static SOCKET
|
|
xmlNanoHTTPConnectHost(const char *host, int port)
|
|
{
|
|
struct sockaddr *addr = NULL;
|
|
struct sockaddr_in sockin;
|
|
|
|
#ifdef SUPPORT_IP6
|
|
struct in6_addr ia6;
|
|
struct sockaddr_in6 sockin6;
|
|
#endif
|
|
SOCKET s;
|
|
|
|
memset (&sockin, 0, sizeof(sockin));
|
|
#ifdef SUPPORT_IP6
|
|
memset (&sockin6, 0, sizeof(sockin6));
|
|
#endif
|
|
|
|
#if !defined(HAVE_GETADDRINFO) && defined(SUPPORT_IP6) && defined(RES_USE_INET6)
|
|
if (have_ipv6 ())
|
|
{
|
|
if (!(_res.options & RES_INIT))
|
|
res_init();
|
|
_res.options |= RES_USE_INET6;
|
|
}
|
|
#endif
|
|
|
|
#if defined(HAVE_GETADDRINFO) && defined(SUPPORT_IP6) && !defined(_WIN32)
|
|
if (have_ipv6 ())
|
|
#endif
|
|
#if defined(HAVE_GETADDRINFO) && (defined(SUPPORT_IP6) || defined(_WIN32))
|
|
{
|
|
int status;
|
|
struct addrinfo hints, *res, *result;
|
|
|
|
result = NULL;
|
|
memset (&hints, 0,sizeof(hints));
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
|
|
status = getaddrinfo (host, NULL, &hints, &result);
|
|
if (status) {
|
|
__xmlIOErr(XML_FROM_HTTP, 0, "getaddrinfo failed\n");
|
|
return INVALID_SOCKET;
|
|
}
|
|
|
|
for (res = result; res; res = res->ai_next) {
|
|
if (res->ai_family == AF_INET) {
|
|
if ((size_t)res->ai_addrlen > sizeof(sockin)) {
|
|
__xmlIOErr(XML_FROM_HTTP, 0, "address size mismatch\n");
|
|
freeaddrinfo (result);
|
|
return INVALID_SOCKET;
|
|
}
|
|
memcpy (&sockin, res->ai_addr, res->ai_addrlen);
|
|
sockin.sin_port = htons (port);
|
|
addr = (struct sockaddr *)&sockin;
|
|
#ifdef SUPPORT_IP6
|
|
} else if (have_ipv6 () && (res->ai_family == AF_INET6)) {
|
|
if ((size_t)res->ai_addrlen > sizeof(sockin6)) {
|
|
__xmlIOErr(XML_FROM_HTTP, 0, "address size mismatch\n");
|
|
freeaddrinfo (result);
|
|
return INVALID_SOCKET;
|
|
}
|
|
memcpy (&sockin6, res->ai_addr, res->ai_addrlen);
|
|
sockin6.sin6_port = htons (port);
|
|
addr = (struct sockaddr *)&sockin6;
|
|
#endif
|
|
} else
|
|
continue; /* for */
|
|
|
|
s = xmlNanoHTTPConnectAttempt (addr);
|
|
if (s != INVALID_SOCKET) {
|
|
freeaddrinfo (result);
|
|
return (s);
|
|
}
|
|
}
|
|
|
|
if (result)
|
|
freeaddrinfo (result);
|
|
}
|
|
#endif
|
|
#if defined(HAVE_GETADDRINFO) && defined(SUPPORT_IP6) && !defined(_WIN32)
|
|
else
|
|
#endif
|
|
#if !defined(HAVE_GETADDRINFO) || !defined(_WIN32)
|
|
{
|
|
struct hostent *h;
|
|
struct in_addr ia;
|
|
int i;
|
|
|
|
h = gethostbyname (GETHOSTBYNAME_ARG_CAST host);
|
|
if (h == NULL) {
|
|
|
|
/*
|
|
* Okay, I got fed up by the non-portability of this error message
|
|
* extraction code. it work on Linux, if it work on your platform
|
|
* and one want to enable it, send me the defined(foobar) needed
|
|
*/
|
|
#if defined(HAVE_NETDB_H) && defined(HOST_NOT_FOUND) && defined(__linux__)
|
|
const char *h_err_txt = "";
|
|
|
|
switch (h_errno) {
|
|
case HOST_NOT_FOUND:
|
|
h_err_txt = "Authoritative host not found";
|
|
break;
|
|
|
|
case TRY_AGAIN:
|
|
h_err_txt =
|
|
"Non-authoritative host not found or server failure.";
|
|
break;
|
|
|
|
case NO_RECOVERY:
|
|
h_err_txt =
|
|
"Non-recoverable errors: FORMERR, REFUSED, or NOTIMP.";
|
|
break;
|
|
|
|
#ifdef NO_ADDRESS
|
|
case NO_ADDRESS:
|
|
h_err_txt =
|
|
"Valid name, no data record of requested type.";
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
h_err_txt = "No error text defined.";
|
|
break;
|
|
}
|
|
__xmlIOErr(XML_FROM_HTTP, 0, h_err_txt);
|
|
#else
|
|
__xmlIOErr(XML_FROM_HTTP, 0, "Failed to resolve host");
|
|
#endif
|
|
return INVALID_SOCKET;
|
|
}
|
|
|
|
for (i = 0; h->h_addr_list[i]; i++) {
|
|
if (h->h_addrtype == AF_INET) {
|
|
/* A records (IPv4) */
|
|
if ((unsigned int) h->h_length > sizeof(ia)) {
|
|
__xmlIOErr(XML_FROM_HTTP, 0, "address size mismatch\n");
|
|
return INVALID_SOCKET;
|
|
}
|
|
memcpy (&ia, h->h_addr_list[i], h->h_length);
|
|
sockin.sin_family = h->h_addrtype;
|
|
sockin.sin_addr = ia;
|
|
sockin.sin_port = (unsigned short)htons ((unsigned short)port);
|
|
addr = (struct sockaddr *) &sockin;
|
|
#ifdef SUPPORT_IP6
|
|
} else if (have_ipv6 () && (h->h_addrtype == AF_INET6)) {
|
|
/* AAAA records (IPv6) */
|
|
if ((unsigned int) h->h_length > sizeof(ia6)) {
|
|
__xmlIOErr(XML_FROM_HTTP, 0, "address size mismatch\n");
|
|
return INVALID_SOCKET;
|
|
}
|
|
memcpy (&ia6, h->h_addr_list[i], h->h_length);
|
|
sockin6.sin6_family = h->h_addrtype;
|
|
sockin6.sin6_addr = ia6;
|
|
sockin6.sin6_port = htons (port);
|
|
addr = (struct sockaddr *) &sockin6;
|
|
#endif
|
|
} else
|
|
break; /* for */
|
|
|
|
s = xmlNanoHTTPConnectAttempt (addr);
|
|
if (s != INVALID_SOCKET)
|
|
return (s);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef DEBUG_HTTP
|
|
xmlGenericError(xmlGenericErrorContext,
|
|
"xmlNanoHTTPConnectHost: unable to connect to '%s'.\n",
|
|
host);
|
|
#endif
|
|
return INVALID_SOCKET;
|
|
}
|
|
|
|
|
|
/**
|
|
* xmlNanoHTTPOpen:
|
|
* @URL: The URL to load
|
|
* @contentType: if available the Content-Type information will be
|
|
* returned at that location
|
|
*
|
|
* This function try to open a connection to the indicated resource
|
|
* via HTTP GET.
|
|
*
|
|
* Returns NULL in case of failure, otherwise a request handler.
|
|
* The contentType, if provided must be freed by the caller
|
|
*/
|
|
|
|
void*
|
|
xmlNanoHTTPOpen(const char *URL, char **contentType) {
|
|
if (contentType != NULL) *contentType = NULL;
|
|
return(xmlNanoHTTPMethod(URL, NULL, NULL, contentType, NULL, 0));
|
|
}
|
|
|
|
/**
|
|
* xmlNanoHTTPOpenRedir:
|
|
* @URL: The URL to load
|
|
* @contentType: if available the Content-Type information will be
|
|
* returned at that location
|
|
* @redir: if available the redirected URL will be returned
|
|
*
|
|
* This function try to open a connection to the indicated resource
|
|
* via HTTP GET.
|
|
*
|
|
* Returns NULL in case of failure, otherwise a request handler.
|
|
* The contentType, if provided must be freed by the caller
|
|
*/
|
|
|
|
void*
|
|
xmlNanoHTTPOpenRedir(const char *URL, char **contentType, char **redir) {
|
|
if (contentType != NULL) *contentType = NULL;
|
|
if (redir != NULL) *redir = NULL;
|
|
return(xmlNanoHTTPMethodRedir(URL, NULL, NULL, contentType, redir, NULL,0));
|
|
}
|
|
|
|
/**
|
|
* xmlNanoHTTPRead:
|
|
* @ctx: the HTTP context
|
|
* @dest: a buffer
|
|
* @len: the buffer length
|
|
*
|
|
* This function tries to read @len bytes from the existing HTTP connection
|
|
* and saves them in @dest. This is a blocking call.
|
|
*
|
|
* Returns the number of byte read. 0 is an indication of an end of connection.
|
|
* -1 indicates a parameter error.
|
|
*/
|
|
int
|
|
xmlNanoHTTPRead(void *ctx, void *dest, int len) {
|
|
xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
|
|
#ifdef LIBXML_ZLIB_ENABLED
|
|
int bytes_read = 0;
|
|
int orig_avail_in;
|
|
int z_ret;
|
|
#endif
|
|
|
|
if (ctx == NULL) return(-1);
|
|
if (dest == NULL) return(-1);
|
|
if (len <= 0) return(0);
|
|
|
|
#ifdef LIBXML_ZLIB_ENABLED
|
|
if (ctxt->usesGzip == 1) {
|
|
if (ctxt->strm == NULL) return(0);
|
|
|
|
ctxt->strm->next_out = dest;
|
|
ctxt->strm->avail_out = len;
|
|
ctxt->strm->avail_in = ctxt->inptr - ctxt->inrptr;
|
|
|
|
while (ctxt->strm->avail_out > 0 &&
|
|
(ctxt->strm->avail_in > 0 || xmlNanoHTTPRecv(ctxt) > 0)) {
|
|
orig_avail_in = ctxt->strm->avail_in =
|
|
ctxt->inptr - ctxt->inrptr - bytes_read;
|
|
ctxt->strm->next_in = BAD_CAST (ctxt->inrptr + bytes_read);
|
|
|
|
z_ret = inflate(ctxt->strm, Z_NO_FLUSH);
|
|
bytes_read += orig_avail_in - ctxt->strm->avail_in;
|
|
|
|
if (z_ret != Z_OK) break;
|
|
}
|
|
|
|
ctxt->inrptr += bytes_read;
|
|
return(len - ctxt->strm->avail_out);
|
|
}
|
|
#endif
|
|
|
|
while (ctxt->inptr - ctxt->inrptr < len) {
|
|
if (xmlNanoHTTPRecv(ctxt) <= 0) break;
|
|
}
|
|
if (ctxt->inptr - ctxt->inrptr < len)
|
|
len = ctxt->inptr - ctxt->inrptr;
|
|
memcpy(dest, ctxt->inrptr, len);
|
|
ctxt->inrptr += len;
|
|
return(len);
|
|
}
|
|
|
|
/**
|
|
* xmlNanoHTTPClose:
|
|
* @ctx: the HTTP context
|
|
*
|
|
* This function closes an HTTP context, it ends up the connection and
|
|
* free all data related to it.
|
|
*/
|
|
void
|
|
xmlNanoHTTPClose(void *ctx) {
|
|
xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
|
|
|
|
if (ctx == NULL) return;
|
|
|
|
xmlNanoHTTPFreeCtxt(ctxt);
|
|
}
|
|
|
|
/**
|
|
* xmlNanoHTTPMethodRedir:
|
|
* @URL: The URL to load
|
|
* @method: the HTTP method to use
|
|
* @input: the input string if any
|
|
* @contentType: the Content-Type information IN and OUT
|
|
* @redir: the redirected URL OUT
|
|
* @headers: the extra headers
|
|
* @ilen: input length
|
|
*
|
|
* This function try to open a connection to the indicated resource
|
|
* via HTTP using the given @method, adding the given extra headers
|
|
* and the input buffer for the request content.
|
|
*
|
|
* Returns NULL in case of failure, otherwise a request handler.
|
|
* The contentType, or redir, if provided must be freed by the caller
|
|
*/
|
|
|
|
void*
|
|
xmlNanoHTTPMethodRedir(const char *URL, const char *method, const char *input,
|
|
char **contentType, char **redir,
|
|
const char *headers, int ilen ) {
|
|
xmlNanoHTTPCtxtPtr ctxt;
|
|
char *bp, *p;
|
|
int blen;
|
|
SOCKET ret;
|
|
int nbRedirects = 0;
|
|
char *redirURL = NULL;
|
|
#ifdef DEBUG_HTTP
|
|
int xmt_bytes;
|
|
#endif
|
|
|
|
if (URL == NULL) return(NULL);
|
|
if (method == NULL) method = "GET";
|
|
xmlNanoHTTPInit();
|
|
|
|
retry:
|
|
if (redirURL == NULL) {
|
|
ctxt = xmlNanoHTTPNewCtxt(URL);
|
|
if (ctxt == NULL)
|
|
return(NULL);
|
|
} else {
|
|
ctxt = xmlNanoHTTPNewCtxt(redirURL);
|
|
if (ctxt == NULL)
|
|
return(NULL);
|
|
ctxt->location = xmlMemStrdup(redirURL);
|
|
}
|
|
|
|
if ((ctxt->protocol == NULL) || (strcmp(ctxt->protocol, "http"))) {
|
|
__xmlIOErr(XML_FROM_HTTP, XML_HTTP_URL_SYNTAX, "Not a valid HTTP URI");
|
|
xmlNanoHTTPFreeCtxt(ctxt);
|
|
if (redirURL != NULL) xmlFree(redirURL);
|
|
return(NULL);
|
|
}
|
|
if (ctxt->hostname == NULL) {
|
|
__xmlIOErr(XML_FROM_HTTP, XML_HTTP_UNKNOWN_HOST,
|
|
"Failed to identify host in URI");
|
|
xmlNanoHTTPFreeCtxt(ctxt);
|
|
if (redirURL != NULL) xmlFree(redirURL);
|
|
return(NULL);
|
|
}
|
|
if (proxy) {
|
|
blen = strlen(ctxt->hostname) * 2 + 16;
|
|
ret = xmlNanoHTTPConnectHost(proxy, proxyPort);
|
|
}
|
|
else {
|
|
blen = strlen(ctxt->hostname);
|
|
ret = xmlNanoHTTPConnectHost(ctxt->hostname, ctxt->port);
|
|
}
|
|
if (ret == INVALID_SOCKET) {
|
|
xmlNanoHTTPFreeCtxt(ctxt);
|
|
if (redirURL != NULL) xmlFree(redirURL);
|
|
return(NULL);
|
|
}
|
|
ctxt->fd = ret;
|
|
|
|
if (input == NULL)
|
|
ilen = 0;
|
|
else
|
|
blen += 36;
|
|
|
|
if (headers != NULL)
|
|
blen += strlen(headers) + 2;
|
|
if (contentType && *contentType)
|
|
/* reserve for string plus 'Content-Type: \r\n" */
|
|
blen += strlen(*contentType) + 16;
|
|
if (ctxt->query != NULL)
|
|
/* 1 for '?' */
|
|
blen += strlen(ctxt->query) + 1;
|
|
blen += strlen(method) + strlen(ctxt->path) + 24;
|
|
#ifdef LIBXML_ZLIB_ENABLED
|
|
/* reserve for possible 'Accept-Encoding: gzip' string */
|
|
blen += 23;
|
|
#endif
|
|
if (ctxt->port != 80) {
|
|
/* reserve space for ':xxxxx', incl. potential proxy */
|
|
if (proxy)
|
|
blen += 17;
|
|
else
|
|
blen += 11;
|
|
}
|
|
bp = (char*)xmlMallocAtomic(blen);
|
|
if ( bp == NULL ) {
|
|
xmlNanoHTTPFreeCtxt( ctxt );
|
|
xmlHTTPErrMemory("allocating header buffer");
|
|
return ( NULL );
|
|
}
|
|
|
|
p = bp;
|
|
|
|
if (proxy) {
|
|
if (ctxt->port != 80) {
|
|
p += snprintf( p, blen - (p - bp), "%s http://%s:%d%s",
|
|
method, ctxt->hostname,
|
|
ctxt->port, ctxt->path );
|
|
}
|
|
else
|
|
p += snprintf( p, blen - (p - bp), "%s http://%s%s", method,
|
|
ctxt->hostname, ctxt->path);
|
|
}
|
|
else
|
|
p += snprintf( p, blen - (p - bp), "%s %s", method, ctxt->path);
|
|
|
|
if (ctxt->query != NULL)
|
|
p += snprintf( p, blen - (p - bp), "?%s", ctxt->query);
|
|
|
|
if (ctxt->port == 80) {
|
|
p += snprintf( p, blen - (p - bp), " HTTP/1.0\r\nHost: %s\r\n",
|
|
ctxt->hostname);
|
|
} else {
|
|
p += snprintf( p, blen - (p - bp), " HTTP/1.0\r\nHost: %s:%d\r\n",
|
|
ctxt->hostname, ctxt->port);
|
|
}
|
|
|
|
#ifdef LIBXML_ZLIB_ENABLED
|
|
p += snprintf(p, blen - (p - bp), "Accept-Encoding: gzip\r\n");
|
|
#endif
|
|
|
|
if (contentType != NULL && *contentType)
|
|
p += snprintf(p, blen - (p - bp), "Content-Type: %s\r\n", *contentType);
|
|
|
|
if (headers != NULL)
|
|
p += snprintf( p, blen - (p - bp), "%s", headers );
|
|
|
|
if (input != NULL)
|
|
snprintf(p, blen - (p - bp), "Content-Length: %d\r\n\r\n", ilen );
|
|
else
|
|
snprintf(p, blen - (p - bp), "\r\n");
|
|
|
|
#ifdef DEBUG_HTTP
|
|
xmlGenericError(xmlGenericErrorContext,
|
|
"-> %s%s", proxy? "(Proxy) " : "", bp);
|
|
if ((blen -= strlen(bp)+1) < 0)
|
|
xmlGenericError(xmlGenericErrorContext,
|
|
"ERROR: overflowed buffer by %d bytes\n", -blen);
|
|
#endif
|
|
ctxt->outptr = ctxt->out = bp;
|
|
ctxt->state = XML_NANO_HTTP_WRITE;
|
|
blen = strlen( ctxt->out );
|
|
#ifdef DEBUG_HTTP
|
|
xmt_bytes = xmlNanoHTTPSend(ctxt, ctxt->out, blen );
|
|
if ( xmt_bytes != blen )
|
|
xmlGenericError( xmlGenericErrorContext,
|
|
"xmlNanoHTTPMethodRedir: Only %d of %d %s %s\n",
|
|
xmt_bytes, blen,
|
|
"bytes of HTTP headers sent to host",
|
|
ctxt->hostname );
|
|
#else
|
|
xmlNanoHTTPSend(ctxt, ctxt->out, blen );
|
|
#endif
|
|
|
|
if ( input != NULL ) {
|
|
#ifdef DEBUG_HTTP
|
|
xmt_bytes = xmlNanoHTTPSend( ctxt, input, ilen );
|
|
|
|
if ( xmt_bytes != ilen )
|
|
xmlGenericError( xmlGenericErrorContext,
|
|
"xmlNanoHTTPMethodRedir: Only %d of %d %s %s\n",
|
|
xmt_bytes, ilen,
|
|
"bytes of HTTP content sent to host",
|
|
ctxt->hostname );
|
|
#else
|
|
xmlNanoHTTPSend( ctxt, input, ilen );
|
|
#endif
|
|
}
|
|
|
|
ctxt->state = XML_NANO_HTTP_READ;
|
|
|
|
while ((p = xmlNanoHTTPReadLine(ctxt)) != NULL) {
|
|
if (*p == 0) {
|
|
ctxt->content = ctxt->inrptr;
|
|
xmlFree(p);
|
|
break;
|
|
}
|
|
xmlNanoHTTPScanAnswer(ctxt, p);
|
|
|
|
#ifdef DEBUG_HTTP
|
|
xmlGenericError(xmlGenericErrorContext, "<- %s\n", p);
|
|
#endif
|
|
xmlFree(p);
|
|
}
|
|
|
|
if ((ctxt->location != NULL) && (ctxt->returnValue >= 300) &&
|
|
(ctxt->returnValue < 400)) {
|
|
#ifdef DEBUG_HTTP
|
|
xmlGenericError(xmlGenericErrorContext,
|
|
"\nRedirect to: %s\n", ctxt->location);
|
|
#endif
|
|
while ( xmlNanoHTTPRecv(ctxt) > 0 )
|
|
;
|
|
if (nbRedirects < XML_NANO_HTTP_MAX_REDIR) {
|
|
nbRedirects++;
|
|
if (redirURL != NULL)
|
|
xmlFree(redirURL);
|
|
redirURL = xmlMemStrdup(ctxt->location);
|
|
xmlNanoHTTPFreeCtxt(ctxt);
|
|
goto retry;
|
|
}
|
|
xmlNanoHTTPFreeCtxt(ctxt);
|
|
if (redirURL != NULL) xmlFree(redirURL);
|
|
#ifdef DEBUG_HTTP
|
|
xmlGenericError(xmlGenericErrorContext,
|
|
"xmlNanoHTTPMethodRedir: Too many redirects, aborting ...\n");
|
|
#endif
|
|
return(NULL);
|
|
}
|
|
|
|
if (contentType != NULL) {
|
|
if (ctxt->contentType != NULL)
|
|
*contentType = xmlMemStrdup(ctxt->contentType);
|
|
else
|
|
*contentType = NULL;
|
|
}
|
|
|
|
if ((redir != NULL) && (redirURL != NULL)) {
|
|
*redir = redirURL;
|
|
} else {
|
|
if (redirURL != NULL)
|
|
xmlFree(redirURL);
|
|
if (redir != NULL)
|
|
*redir = NULL;
|
|
}
|
|
|
|
#ifdef DEBUG_HTTP
|
|
if (ctxt->contentType != NULL)
|
|
xmlGenericError(xmlGenericErrorContext,
|
|
"\nCode %d, content-type '%s'\n\n",
|
|
ctxt->returnValue, ctxt->contentType);
|
|
else
|
|
xmlGenericError(xmlGenericErrorContext,
|
|
"\nCode %d, no content-type\n\n",
|
|
ctxt->returnValue);
|
|
#endif
|
|
|
|
return((void *) ctxt);
|
|
}
|
|
|
|
/**
|
|
* xmlNanoHTTPMethod:
|
|
* @URL: The URL to load
|
|
* @method: the HTTP method to use
|
|
* @input: the input string if any
|
|
* @contentType: the Content-Type information IN and OUT
|
|
* @headers: the extra headers
|
|
* @ilen: input length
|
|
*
|
|
* This function try to open a connection to the indicated resource
|
|
* via HTTP using the given @method, adding the given extra headers
|
|
* and the input buffer for the request content.
|
|
*
|
|
* Returns NULL in case of failure, otherwise a request handler.
|
|
* The contentType, if provided must be freed by the caller
|
|
*/
|
|
|
|
void*
|
|
xmlNanoHTTPMethod(const char *URL, const char *method, const char *input,
|
|
char **contentType, const char *headers, int ilen) {
|
|
return(xmlNanoHTTPMethodRedir(URL, method, input, contentType,
|
|
NULL, headers, ilen));
|
|
}
|
|
|
|
/**
|
|
* xmlNanoHTTPFetch:
|
|
* @URL: The URL to load
|
|
* @filename: the filename where the content should be saved
|
|
* @contentType: if available the Content-Type information will be
|
|
* returned at that location
|
|
*
|
|
* This function try to fetch the indicated resource via HTTP GET
|
|
* and save it's content in the file.
|
|
*
|
|
* Returns -1 in case of failure, 0 in case of success. The contentType,
|
|
* if provided must be freed by the caller
|
|
*/
|
|
int
|
|
xmlNanoHTTPFetch(const char *URL, const char *filename, char **contentType) {
|
|
void *ctxt = NULL;
|
|
char *buf = NULL;
|
|
int fd;
|
|
int len;
|
|
int ret = 0;
|
|
|
|
if (filename == NULL) return(-1);
|
|
ctxt = xmlNanoHTTPOpen(URL, contentType);
|
|
if (ctxt == NULL) return(-1);
|
|
|
|
if (!strcmp(filename, "-"))
|
|
fd = 0;
|
|
else {
|
|
fd = open(filename, O_CREAT | O_WRONLY, 00644);
|
|
if (fd < 0) {
|
|
xmlNanoHTTPClose(ctxt);
|
|
if ((contentType != NULL) && (*contentType != NULL)) {
|
|
xmlFree(*contentType);
|
|
*contentType = NULL;
|
|
}
|
|
return(-1);
|
|
}
|
|
}
|
|
|
|
xmlNanoHTTPFetchContent( ctxt, &buf, &len );
|
|
if ( len > 0 ) {
|
|
if (write(fd, buf, len) == -1) {
|
|
ret = -1;
|
|
}
|
|
}
|
|
|
|
xmlNanoHTTPClose(ctxt);
|
|
close(fd);
|
|
return(ret);
|
|
}
|
|
|
|
#ifdef LIBXML_OUTPUT_ENABLED
|
|
/**
|
|
* xmlNanoHTTPSave:
|
|
* @ctxt: the HTTP context
|
|
* @filename: the filename where the content should be saved
|
|
*
|
|
* This function saves the output of the HTTP transaction to a file
|
|
* It closes and free the context at the end
|
|
*
|
|
* Returns -1 in case of failure, 0 in case of success.
|
|
*/
|
|
int
|
|
xmlNanoHTTPSave(void *ctxt, const char *filename) {
|
|
char *buf = NULL;
|
|
int fd;
|
|
int len;
|
|
int ret = 0;
|
|
|
|
if ((ctxt == NULL) || (filename == NULL)) return(-1);
|
|
|
|
if (!strcmp(filename, "-"))
|
|
fd = 0;
|
|
else {
|
|
fd = open(filename, O_CREAT | O_WRONLY, 0666);
|
|
if (fd < 0) {
|
|
xmlNanoHTTPClose(ctxt);
|
|
return(-1);
|
|
}
|
|
}
|
|
|
|
xmlNanoHTTPFetchContent( ctxt, &buf, &len );
|
|
if ( len > 0 ) {
|
|
if (write(fd, buf, len) == -1) {
|
|
ret = -1;
|
|
}
|
|
}
|
|
|
|
xmlNanoHTTPClose(ctxt);
|
|
close(fd);
|
|
return(ret);
|
|
}
|
|
#endif /* LIBXML_OUTPUT_ENABLED */
|
|
|
|
/**
|
|
* xmlNanoHTTPReturnCode:
|
|
* @ctx: the HTTP context
|
|
*
|
|
* Get the latest HTTP return code received
|
|
*
|
|
* Returns the HTTP return code for the request.
|
|
*/
|
|
int
|
|
xmlNanoHTTPReturnCode(void *ctx) {
|
|
xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
|
|
|
|
if (ctxt == NULL) return(-1);
|
|
|
|
return(ctxt->returnValue);
|
|
}
|
|
|
|
/**
|
|
* xmlNanoHTTPAuthHeader:
|
|
* @ctx: the HTTP context
|
|
*
|
|
* Get the authentication header of an HTTP context
|
|
*
|
|
* Returns the stashed value of the WWW-Authenticate or Proxy-Authenticate
|
|
* header.
|
|
*/
|
|
const char *
|
|
xmlNanoHTTPAuthHeader(void *ctx) {
|
|
xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
|
|
|
|
if (ctxt == NULL) return(NULL);
|
|
|
|
return(ctxt->authHeader);
|
|
}
|
|
|
|
/**
|
|
* xmlNanoHTTPContentLength:
|
|
* @ctx: the HTTP context
|
|
*
|
|
* Provides the specified content length from the HTTP header.
|
|
*
|
|
* Return the specified content length from the HTTP header. Note that
|
|
* a value of -1 indicates that the content length element was not included in
|
|
* the response header.
|
|
*/
|
|
int
|
|
xmlNanoHTTPContentLength( void * ctx ) {
|
|
xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;
|
|
|
|
return ( ( ctxt == NULL ) ? -1 : ctxt->ContentLength );
|
|
}
|
|
|
|
/**
|
|
* xmlNanoHTTPRedir:
|
|
* @ctx: the HTTP context
|
|
*
|
|
* Provides the specified redirection URL if available from the HTTP header.
|
|
*
|
|
* Return the specified redirection URL or NULL if not redirected.
|
|
*/
|
|
const char *
|
|
xmlNanoHTTPRedir( void * ctx ) {
|
|
xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;
|
|
|
|
return ( ( ctxt == NULL ) ? NULL : ctxt->location );
|
|
}
|
|
|
|
/**
|
|
* xmlNanoHTTPEncoding:
|
|
* @ctx: the HTTP context
|
|
*
|
|
* Provides the specified encoding if specified in the HTTP headers.
|
|
*
|
|
* Return the specified encoding or NULL if not available
|
|
*/
|
|
const char *
|
|
xmlNanoHTTPEncoding( void * ctx ) {
|
|
xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;
|
|
|
|
return ( ( ctxt == NULL ) ? NULL : ctxt->encoding );
|
|
}
|
|
|
|
/**
|
|
* xmlNanoHTTPMimeType:
|
|
* @ctx: the HTTP context
|
|
*
|
|
* Provides the specified Mime-Type if specified in the HTTP headers.
|
|
*
|
|
* Return the specified Mime-Type or NULL if not available
|
|
*/
|
|
const char *
|
|
xmlNanoHTTPMimeType( void * ctx ) {
|
|
xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;
|
|
|
|
return ( ( ctxt == NULL ) ? NULL : ctxt->mimeType );
|
|
}
|
|
|
|
/**
|
|
* xmlNanoHTTPFetchContent:
|
|
* @ctx: the HTTP context
|
|
* @ptr: pointer to set to the content buffer.
|
|
* @len: integer pointer to hold the length of the content
|
|
*
|
|
* Check if all the content was read
|
|
*
|
|
* Returns 0 if all the content was read and available, returns
|
|
* -1 if received content length was less than specified or an error
|
|
* occurred.
|
|
*/
|
|
static int
|
|
xmlNanoHTTPFetchContent( void * ctx, char ** ptr, int * len ) {
|
|
xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr)ctx;
|
|
|
|
int rc = 0;
|
|
int cur_lgth;
|
|
int rcvd_lgth;
|
|
int dummy_int;
|
|
char * dummy_ptr = NULL;
|
|
|
|
/* Dummy up return input parameters if not provided */
|
|
|
|
if ( len == NULL )
|
|
len = &dummy_int;
|
|
|
|
if ( ptr == NULL )
|
|
ptr = &dummy_ptr;
|
|
|
|
/* But can't work without the context pointer */
|
|
|
|
if ( ( ctxt == NULL ) || ( ctxt->content == NULL ) ) {
|
|
*len = 0;
|
|
*ptr = NULL;
|
|
return ( -1 );
|
|
}
|
|
|
|
rcvd_lgth = ctxt->inptr - ctxt->content;
|
|
|
|
while ( (cur_lgth = xmlNanoHTTPRecv( ctxt )) > 0 ) {
|
|
|
|
rcvd_lgth += cur_lgth;
|
|
if ( (ctxt->ContentLength > 0) && (rcvd_lgth >= ctxt->ContentLength) )
|
|
break;
|
|
}
|
|
|
|
*ptr = ctxt->content;
|
|
*len = rcvd_lgth;
|
|
|
|
if ( ( ctxt->ContentLength > 0 ) && ( rcvd_lgth < ctxt->ContentLength ) )
|
|
rc = -1;
|
|
else if ( rcvd_lgth == 0 )
|
|
rc = -1;
|
|
|
|
return ( rc );
|
|
}
|
|
|
|
#ifdef STANDALONE
|
|
int main(int argc, char **argv) {
|
|
char *contentType = NULL;
|
|
|
|
if (argv[1] != NULL) {
|
|
if (argv[2] != NULL)
|
|
xmlNanoHTTPFetch(argv[1], argv[2], &contentType);
|
|
else
|
|
xmlNanoHTTPFetch(argv[1], "-", &contentType);
|
|
if (contentType != NULL) xmlFree(contentType);
|
|
} else {
|
|
xmlGenericError(xmlGenericErrorContext,
|
|
"%s: minimal HTTP GET implementation\n", argv[0]);
|
|
xmlGenericError(xmlGenericErrorContext,
|
|
"\tusage %s [ URL [ filename ] ]\n", argv[0]);
|
|
}
|
|
xmlNanoHTTPCleanup();
|
|
xmlMemoryDump();
|
|
return(0);
|
|
}
|
|
#endif /* STANDALONE */
|
|
#else /* !LIBXML_HTTP_ENABLED */
|
|
#ifdef STANDALONE
|
|
#include <stdio.h>
|
|
int main(int argc, char **argv) {
|
|
xmlGenericError(xmlGenericErrorContext,
|
|
"%s : HTTP support not compiled in\n", argv[0]);
|
|
return(0);
|
|
}
|
|
#endif /* STANDALONE */
|
|
#endif /* LIBXML_HTTP_ENABLED */
|
|
#define bottom_nanohttp
|
|
#include "elfgcchack.h"
|