660 lines
16 KiB
C
660 lines
16 KiB
C
/* $Id: miniwget.c,v 1.75 2016/01/24 17:24:36 nanard Exp $ */
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/* Project : miniupnp
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* Website : http://miniupnp.free.fr/
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* Author : Thomas Bernard
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* Copyright (c) 2005-2016 Thomas Bernard
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* This software is subject to the conditions detailed in the
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* LICENCE file provided in this distribution. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#ifdef _WIN32
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#include <io.h>
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#define MAXHOSTNAMELEN 64
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#define snprintf _snprintf
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#define socklen_t int
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#ifndef strncasecmp
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#if defined(_MSC_VER) && (_MSC_VER >= 1400)
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#define strncasecmp _memicmp
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#else /* defined(_MSC_VER) && (_MSC_VER >= 1400) */
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#define strncasecmp memicmp
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#endif /* defined(_MSC_VER) && (_MSC_VER >= 1400) */
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#endif /* #ifndef strncasecmp */
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#else /* #ifdef _WIN32 */
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#include <unistd.h>
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#include <sys/param.h>
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#if defined(__amigaos__) && !defined(__amigaos4__)
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#define socklen_t int
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#else /* #if defined(__amigaos__) && !defined(__amigaos4__) */
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#include <sys/select.h>
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#endif /* #else defined(__amigaos__) && !defined(__amigaos4__) */
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <net/if.h>
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#include <netdb.h>
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#define closesocket close
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#include <strings.h>
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#endif /* #else _WIN32 */
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#ifdef __GNU__
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#define MAXHOSTNAMELEN 64
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#endif /* __GNU__ */
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#ifndef MIN
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#define MIN(x,y) (((x)<(y))?(x):(y))
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#endif /* MIN */
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#include "miniupnpcstrings.h"
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#include "miniwget.h"
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#include "connecthostport.h"
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#include "receivedata.h"
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#ifndef MAXHOSTNAMELEN
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#define MAXHOSTNAMELEN 64
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#endif
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/*
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* Read a HTTP response from a socket.
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* Process Content-Length and Transfer-encoding headers.
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* return a pointer to the content buffer, which length is saved
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* to the length parameter.
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*/
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void *
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getHTTPResponse(int s, int * size, int * status_code)
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{
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char buf[2048];
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int n;
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int endofheaders = 0;
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int chunked = 0;
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int content_length = -1;
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unsigned int chunksize = 0;
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unsigned int bytestocopy = 0;
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/* buffers : */
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char * header_buf;
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unsigned int header_buf_len = 2048;
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unsigned int header_buf_used = 0;
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char * content_buf;
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unsigned int content_buf_len = 2048;
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unsigned int content_buf_used = 0;
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char chunksize_buf[32];
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unsigned int chunksize_buf_index;
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char * reason_phrase = NULL;
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int reason_phrase_len = 0;
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if(status_code) *status_code = -1;
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header_buf = malloc(header_buf_len);
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if(header_buf == NULL)
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{
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#ifdef DEBUG
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fprintf(stderr, "%s: Memory allocation error\n", "getHTTPResponse");
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#endif /* DEBUG */
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*size = -1;
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return NULL;
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}
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content_buf = malloc(content_buf_len);
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if(content_buf == NULL)
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{
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free(header_buf);
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#ifdef DEBUG
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fprintf(stderr, "%s: Memory allocation error\n", "getHTTPResponse");
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#endif /* DEBUG */
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*size = -1;
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return NULL;
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}
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chunksize_buf[0] = '\0';
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chunksize_buf_index = 0;
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while((n = receivedata(s, buf, 2048, 5000, NULL)) > 0)
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{
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if(endofheaders == 0)
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{
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int i;
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int linestart=0;
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int colon=0;
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int valuestart=0;
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if(header_buf_used + n > header_buf_len) {
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char * tmp = realloc(header_buf, header_buf_used + n);
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if(tmp == NULL) {
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/* memory allocation error */
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free(header_buf);
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free(content_buf);
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*size = -1;
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return NULL;
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}
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header_buf = tmp;
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header_buf_len = header_buf_used + n;
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}
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memcpy(header_buf + header_buf_used, buf, n);
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header_buf_used += n;
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/* search for CR LF CR LF (end of headers)
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* recognize also LF LF */
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i = 0;
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while(i < ((int)header_buf_used-1) && (endofheaders == 0)) {
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if(header_buf[i] == '\r') {
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i++;
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if(header_buf[i] == '\n') {
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i++;
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if(i < (int)header_buf_used && header_buf[i] == '\r') {
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i++;
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if(i < (int)header_buf_used && header_buf[i] == '\n') {
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endofheaders = i+1;
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}
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}
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}
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} else if(header_buf[i] == '\n') {
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i++;
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if(header_buf[i] == '\n') {
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endofheaders = i+1;
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}
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}
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i++;
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}
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if(endofheaders == 0)
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continue;
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/* parse header lines */
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for(i = 0; i < endofheaders - 1; i++) {
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if(linestart > 0 && colon <= linestart && header_buf[i]==':')
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{
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colon = i;
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while(i < (endofheaders-1)
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&& (header_buf[i+1] == ' ' || header_buf[i+1] == '\t'))
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i++;
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valuestart = i + 1;
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}
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/* detecting end of line */
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else if(header_buf[i]=='\r' || header_buf[i]=='\n')
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{
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if(linestart == 0 && status_code)
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{
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/* Status line
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* HTTP-Version SP Status-Code SP Reason-Phrase CRLF */
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int sp;
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for(sp = 0; sp < i; sp++)
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if(header_buf[sp] == ' ')
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{
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if(*status_code < 0)
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*status_code = atoi(header_buf + sp + 1);
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else
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{
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reason_phrase = header_buf + sp + 1;
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reason_phrase_len = i - sp - 1;
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break;
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}
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}
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#ifdef DEBUG
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printf("HTTP status code = %d, Reason phrase = %.*s\n",
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*status_code, reason_phrase_len, reason_phrase);
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#endif
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}
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else if(colon > linestart && valuestart > colon)
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{
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#ifdef DEBUG
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printf("header='%.*s', value='%.*s'\n",
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colon-linestart, header_buf+linestart,
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i-valuestart, header_buf+valuestart);
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#endif
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if(0==strncasecmp(header_buf+linestart, "content-length", colon-linestart))
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{
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content_length = atoi(header_buf+valuestart);
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#ifdef DEBUG
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printf("Content-Length: %d\n", content_length);
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#endif
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}
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else if(0==strncasecmp(header_buf+linestart, "transfer-encoding", colon-linestart)
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&& 0==strncasecmp(header_buf+valuestart, "chunked", 7))
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{
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#ifdef DEBUG
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printf("chunked transfer-encoding!\n");
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#endif
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chunked = 1;
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}
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}
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while((i < (int)header_buf_used) && (header_buf[i]=='\r' || header_buf[i] == '\n'))
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i++;
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linestart = i;
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colon = linestart;
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valuestart = 0;
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}
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}
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/* copy the remaining of the received data back to buf */
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n = header_buf_used - endofheaders;
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memcpy(buf, header_buf + endofheaders, n);
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/* if(headers) */
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}
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if(endofheaders)
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{
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/* content */
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if(chunked)
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{
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int i = 0;
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while(i < n)
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{
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if(chunksize == 0)
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{
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/* reading chunk size */
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if(chunksize_buf_index == 0) {
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/* skipping any leading CR LF */
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if(i<n && buf[i] == '\r') i++;
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if(i<n && buf[i] == '\n') i++;
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}
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while(i<n && isxdigit(buf[i])
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&& chunksize_buf_index < (sizeof(chunksize_buf)-1))
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{
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chunksize_buf[chunksize_buf_index++] = buf[i];
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chunksize_buf[chunksize_buf_index] = '\0';
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i++;
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}
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while(i<n && buf[i] != '\r' && buf[i] != '\n')
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i++; /* discarding chunk-extension */
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if(i<n && buf[i] == '\r') i++;
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if(i<n && buf[i] == '\n') {
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unsigned int j;
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for(j = 0; j < chunksize_buf_index; j++) {
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if(chunksize_buf[j] >= '0'
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&& chunksize_buf[j] <= '9')
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chunksize = (chunksize << 4) + (chunksize_buf[j] - '0');
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else
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chunksize = (chunksize << 4) + ((chunksize_buf[j] | 32) - 'a' + 10);
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}
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chunksize_buf[0] = '\0';
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chunksize_buf_index = 0;
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i++;
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} else {
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/* not finished to get chunksize */
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continue;
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}
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#ifdef DEBUG
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printf("chunksize = %u (%x)\n", chunksize, chunksize);
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#endif
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if(chunksize == 0)
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{
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#ifdef DEBUG
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printf("end of HTTP content - %d %d\n", i, n);
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/*printf("'%.*s'\n", n-i, buf+i);*/
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#endif
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goto end_of_stream;
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}
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}
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/* it is guaranteed that (n >= i) */
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bytestocopy = (chunksize < (unsigned int)(n - i))?chunksize:(unsigned int)(n - i);
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if((content_buf_used + bytestocopy) > content_buf_len)
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{
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char * tmp;
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if((content_length >= 0) && ((unsigned int)content_length >= (content_buf_used + bytestocopy))) {
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content_buf_len = content_length;
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} else {
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content_buf_len = content_buf_used + bytestocopy;
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}
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tmp = realloc(content_buf, content_buf_len);
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if(tmp == NULL) {
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/* memory allocation error */
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free(content_buf);
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free(header_buf);
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*size = -1;
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return NULL;
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}
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content_buf = tmp;
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}
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memcpy(content_buf + content_buf_used, buf + i, bytestocopy);
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content_buf_used += bytestocopy;
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i += bytestocopy;
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chunksize -= bytestocopy;
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}
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}
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else
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{
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/* not chunked */
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if(content_length > 0
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&& (content_buf_used + n) > (unsigned int)content_length) {
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/* skipping additional bytes */
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n = content_length - content_buf_used;
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}
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if(content_buf_used + n > content_buf_len)
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{
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char * tmp;
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if(content_length >= 0
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&& (unsigned int)content_length >= (content_buf_used + n)) {
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content_buf_len = content_length;
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} else {
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content_buf_len = content_buf_used + n;
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}
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tmp = realloc(content_buf, content_buf_len);
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if(tmp == NULL) {
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/* memory allocation error */
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free(content_buf);
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free(header_buf);
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*size = -1;
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return NULL;
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}
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content_buf = tmp;
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}
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memcpy(content_buf + content_buf_used, buf, n);
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content_buf_used += n;
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}
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}
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/* use the Content-Length header value if available */
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if(content_length > 0 && content_buf_used >= (unsigned int)content_length)
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{
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#ifdef DEBUG
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printf("End of HTTP content\n");
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#endif
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break;
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}
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}
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end_of_stream:
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free(header_buf); header_buf = NULL;
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*size = content_buf_used;
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if(content_buf_used == 0)
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{
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free(content_buf);
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content_buf = NULL;
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}
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return content_buf;
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}
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/* miniwget3() :
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* do all the work.
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* Return NULL if something failed. */
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static void *
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miniwget3(const char * host,
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unsigned short port, const char * path,
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int * size, char * addr_str, int addr_str_len,
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const char * httpversion, unsigned int scope_id,
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int * status_code)
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{
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char buf[2048];
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int s;
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int n;
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int len;
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int sent;
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void * content;
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*size = 0;
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s = connecthostport(host, port, scope_id);
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if(s < 0)
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return NULL;
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/* get address for caller ! */
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if(addr_str)
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{
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struct sockaddr_storage saddr;
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socklen_t saddrlen;
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saddrlen = sizeof(saddr);
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if(getsockname(s, (struct sockaddr *)&saddr, &saddrlen) < 0)
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{
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perror("getsockname");
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}
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else
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{
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#if defined(__amigaos__) && !defined(__amigaos4__)
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/* using INT WINAPI WSAAddressToStringA(LPSOCKADDR, DWORD, LPWSAPROTOCOL_INFOA, LPSTR, LPDWORD);
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* But his function make a string with the port : nn.nn.nn.nn:port */
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/* if(WSAAddressToStringA((SOCKADDR *)&saddr, sizeof(saddr),
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NULL, addr_str, (DWORD *)&addr_str_len))
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{
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printf("WSAAddressToStringA() failed : %d\n", WSAGetLastError());
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}*/
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/* the following code is only compatible with ip v4 addresses */
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strncpy(addr_str, inet_ntoa(((struct sockaddr_in *)&saddr)->sin_addr), addr_str_len);
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#else
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#if 0
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if(saddr.sa_family == AF_INET6) {
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inet_ntop(AF_INET6,
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&(((struct sockaddr_in6 *)&saddr)->sin6_addr),
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addr_str, addr_str_len);
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} else {
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inet_ntop(AF_INET,
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&(((struct sockaddr_in *)&saddr)->sin_addr),
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addr_str, addr_str_len);
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}
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#endif
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/* getnameinfo return ip v6 address with the scope identifier
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* such as : 2a01:e35:8b2b:7330::%4281128194 */
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n = getnameinfo((const struct sockaddr *)&saddr, saddrlen,
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addr_str, addr_str_len,
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NULL, 0,
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NI_NUMERICHOST | NI_NUMERICSERV);
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if(n != 0) {
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#ifdef _WIN32
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fprintf(stderr, "getnameinfo() failed : %d\n", n);
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#else
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fprintf(stderr, "getnameinfo() failed : %s\n", gai_strerror(n));
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#endif
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}
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#endif
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}
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#ifdef DEBUG
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printf("address miniwget : %s\n", addr_str);
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#endif
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}
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len = snprintf(buf, sizeof(buf),
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"GET %s HTTP/%s\r\n"
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"Host: %s:%d\r\n"
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"Connection: Close\r\n"
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"User-Agent: " OS_STRING ", " UPNP_VERSION_STRING ", MiniUPnPc/" MINIUPNPC_VERSION_STRING "\r\n"
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"\r\n",
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path, httpversion, host, port);
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if ((unsigned int)len >= sizeof(buf))
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{
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closesocket(s);
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return NULL;
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}
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sent = 0;
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/* sending the HTTP request */
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while(sent < len)
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{
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n = send(s, buf+sent, len-sent, 0);
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if(n < 0)
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{
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perror("send");
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closesocket(s);
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return NULL;
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}
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else
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{
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sent += n;
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}
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}
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content = getHTTPResponse(s, size, status_code);
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closesocket(s);
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return content;
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}
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/* miniwget2() :
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* Call miniwget3(); retry with HTTP/1.1 if 1.0 fails. */
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static void *
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miniwget2(const char * host,
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unsigned short port, const char * path,
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int * size, char * addr_str, int addr_str_len,
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unsigned int scope_id, int * status_code)
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{
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char * respbuffer;
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#if 1
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respbuffer = miniwget3(host, port, path, size,
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addr_str, addr_str_len, "1.1",
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scope_id, status_code);
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#else
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respbuffer = miniwget3(host, port, path, size,
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addr_str, addr_str_len, "1.0",
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scope_id, status_code);
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if (*size == 0)
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{
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#ifdef DEBUG
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printf("Retrying with HTTP/1.1\n");
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#endif
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free(respbuffer);
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respbuffer = miniwget3(host, port, path, size,
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addr_str, addr_str_len, "1.1",
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scope_id, status_code);
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}
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#endif
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return respbuffer;
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}
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/* parseURL()
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* arguments :
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* url : source string not modified
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* hostname : hostname destination string (size of MAXHOSTNAMELEN+1)
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* port : port (destination)
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* path : pointer to the path part of the URL
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*
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* Return values :
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* 0 - Failure
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* 1 - Success */
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int
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parseURL(const char * url,
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char * hostname, unsigned short * port,
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char * * path, unsigned int * scope_id)
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|
{
|
|
char * p1, *p2, *p3;
|
|
if(!url)
|
|
return 0;
|
|
p1 = strstr(url, "://");
|
|
if(!p1)
|
|
return 0;
|
|
p1 += 3;
|
|
if( (url[0]!='h') || (url[1]!='t')
|
|
||(url[2]!='t') || (url[3]!='p'))
|
|
return 0;
|
|
memset(hostname, 0, MAXHOSTNAMELEN + 1);
|
|
if(*p1 == '[')
|
|
{
|
|
/* IP v6 : http://[2a00:1450:8002::6a]/path/abc */
|
|
char * scope;
|
|
scope = strchr(p1, '%');
|
|
p2 = strchr(p1, ']');
|
|
if(p2 && scope && scope < p2 && scope_id) {
|
|
/* parse scope */
|
|
#ifdef IF_NAMESIZE
|
|
char tmp[IF_NAMESIZE];
|
|
int l;
|
|
scope++;
|
|
/* "%25" is just '%' in URL encoding */
|
|
if(scope[0] == '2' && scope[1] == '5')
|
|
scope += 2; /* skip "25" */
|
|
l = p2 - scope;
|
|
if(l >= IF_NAMESIZE)
|
|
l = IF_NAMESIZE - 1;
|
|
memcpy(tmp, scope, l);
|
|
tmp[l] = '\0';
|
|
*scope_id = if_nametoindex(tmp);
|
|
if(*scope_id == 0) {
|
|
*scope_id = (unsigned int)strtoul(tmp, NULL, 10);
|
|
}
|
|
#else
|
|
/* under windows, scope is numerical */
|
|
char tmp[8];
|
|
int l;
|
|
scope++;
|
|
/* "%25" is just '%' in URL encoding */
|
|
if(scope[0] == '2' && scope[1] == '5')
|
|
scope += 2; /* skip "25" */
|
|
l = p2 - scope;
|
|
if(l >= sizeof(tmp))
|
|
l = sizeof(tmp) - 1;
|
|
memcpy(tmp, scope, l);
|
|
tmp[l] = '\0';
|
|
*scope_id = (unsigned int)strtoul(tmp, NULL, 10);
|
|
#endif
|
|
}
|
|
p3 = strchr(p1, '/');
|
|
if(p2 && p3)
|
|
{
|
|
p2++;
|
|
strncpy(hostname, p1, MIN(MAXHOSTNAMELEN, (int)(p2-p1)));
|
|
if(*p2 == ':')
|
|
{
|
|
*port = 0;
|
|
p2++;
|
|
while( (*p2 >= '0') && (*p2 <= '9'))
|
|
{
|
|
*port *= 10;
|
|
*port += (unsigned short)(*p2 - '0');
|
|
p2++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
*port = 80;
|
|
}
|
|
*path = p3;
|
|
return 1;
|
|
}
|
|
}
|
|
p2 = strchr(p1, ':');
|
|
p3 = strchr(p1, '/');
|
|
if(!p3)
|
|
return 0;
|
|
if(!p2 || (p2>p3))
|
|
{
|
|
strncpy(hostname, p1, MIN(MAXHOSTNAMELEN, (int)(p3-p1)));
|
|
*port = 80;
|
|
}
|
|
else
|
|
{
|
|
strncpy(hostname, p1, MIN(MAXHOSTNAMELEN, (int)(p2-p1)));
|
|
*port = 0;
|
|
p2++;
|
|
while( (*p2 >= '0') && (*p2 <= '9'))
|
|
{
|
|
*port *= 10;
|
|
*port += (unsigned short)(*p2 - '0');
|
|
p2++;
|
|
}
|
|
}
|
|
*path = p3;
|
|
return 1;
|
|
}
|
|
|
|
void *
|
|
miniwget(const char * url, int * size,
|
|
unsigned int scope_id, int * status_code)
|
|
{
|
|
unsigned short port;
|
|
char * path;
|
|
/* protocol://host:port/chemin */
|
|
char hostname[MAXHOSTNAMELEN+1];
|
|
*size = 0;
|
|
if(!parseURL(url, hostname, &port, &path, &scope_id))
|
|
return NULL;
|
|
#ifdef DEBUG
|
|
printf("parsed url : hostname='%s' port=%hu path='%s' scope_id=%u\n",
|
|
hostname, port, path, scope_id);
|
|
#endif
|
|
return miniwget2(hostname, port, path, size, 0, 0, scope_id, status_code);
|
|
}
|
|
|
|
void *
|
|
miniwget_getaddr(const char * url, int * size,
|
|
char * addr, int addrlen, unsigned int scope_id,
|
|
int * status_code)
|
|
{
|
|
unsigned short port;
|
|
char * path;
|
|
/* protocol://host:port/path */
|
|
char hostname[MAXHOSTNAMELEN+1];
|
|
*size = 0;
|
|
if(addr)
|
|
addr[0] = '\0';
|
|
if(!parseURL(url, hostname, &port, &path, &scope_id))
|
|
return NULL;
|
|
#ifdef DEBUG
|
|
printf("parsed url : hostname='%s' port=%hu path='%s' scope_id=%u\n",
|
|
hostname, port, path, scope_id);
|
|
#endif
|
|
return miniwget2(hostname, port, path, size, addr, addrlen, scope_id, status_code);
|
|
}
|
|
|