2011-03-10 18:48:02 +08:00
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/***************************************************************************
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2004-05-24 23:12:37 +08:00
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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2011-03-10 18:48:02 +08:00
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* Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
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2004-05-24 23:12:37 +08:00
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*
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2011-03-10 18:48:02 +08:00
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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/* This is an example showing the multi interface and the debug callback. */
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2004-05-24 23:12:37 +08:00
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#include <stdio.h>
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#include <string.h>
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/* somewhat unix-specific */
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#include <sys/time.h>
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#include <unistd.h>
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/* curl stuff */
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#include <curl/curl.h>
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typedef char bool;
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#define TRUE 1
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static
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void dump(const char *text,
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FILE *stream, unsigned char *ptr, size_t size,
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bool nohex)
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{
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size_t i;
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size_t c;
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unsigned int width=0x10;
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if(nohex)
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/* without the hex output, we can fit more on screen */
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width = 0x40;
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2010-12-18 06:34:26 +08:00
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fprintf(stream, "%s, %10.10ld bytes (0x%8.8lx)\n",
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2009-06-06 02:40:40 +08:00
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text, (long)size, (long)size);
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2004-05-24 23:12:37 +08:00
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for(i=0; i<size; i+= width) {
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2010-12-18 06:34:26 +08:00
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fprintf(stream, "%4.4lx: ", (long)i);
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2004-05-24 23:12:37 +08:00
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if(!nohex) {
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/* hex not disabled, show it */
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for(c = 0; c < width; c++)
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if(i+c < size)
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fprintf(stream, "%02x ", ptr[i+c]);
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else
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fputs(" ", stream);
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}
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for(c = 0; (c < width) && (i+c < size); c++) {
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/* check for 0D0A; if found, skip past and start a new line of output */
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if (nohex && (i+c+1 < size) && ptr[i+c]==0x0D && ptr[i+c+1]==0x0A) {
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i+=(c+2-width);
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break;
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}
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fprintf(stream, "%c",
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(ptr[i+c]>=0x20) && (ptr[i+c]<0x80)?ptr[i+c]:'.');
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/* check again for 0D0A, to avoid an extra \n if it's at width */
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if (nohex && (i+c+2 < size) && ptr[i+c+1]==0x0D && ptr[i+c+2]==0x0A) {
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i+=(c+3-width);
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break;
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}
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}
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fputc('\n', stream); /* newline */
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}
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fflush(stream);
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}
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static
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int my_trace(CURL *handle, curl_infotype type,
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2009-06-06 02:40:40 +08:00
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unsigned char *data, size_t size,
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2004-05-24 23:12:37 +08:00
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void *userp)
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{
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const char *text;
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2010-12-18 06:34:26 +08:00
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(void)userp;
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2004-05-24 23:12:37 +08:00
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(void)handle; /* prevent compiler warning */
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switch (type) {
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case CURLINFO_TEXT:
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fprintf(stderr, "== Info: %s", data);
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default: /* in case a new one is introduced to shock us */
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return 0;
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case CURLINFO_HEADER_OUT:
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text = "=> Send header";
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break;
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case CURLINFO_DATA_OUT:
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text = "=> Send data";
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break;
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case CURLINFO_HEADER_IN:
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text = "<= Recv header";
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break;
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case CURLINFO_DATA_IN:
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text = "<= Recv data";
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break;
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}
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dump(text, stderr, data, size, TRUE);
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return 0;
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}
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/*
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* Simply download a HTTP file.
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*/
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2010-12-18 06:34:26 +08:00
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int main(void)
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2004-05-24 23:12:37 +08:00
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{
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CURL *http_handle;
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CURLM *multi_handle;
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int still_running; /* keep number of running handles */
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http_handle = curl_easy_init();
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/* set the options (I left out a few, you'll get the point anyway) */
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2010-10-05 21:00:19 +08:00
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curl_easy_setopt(http_handle, CURLOPT_URL, "http://www.example.com/");
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2004-05-24 23:12:37 +08:00
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curl_easy_setopt(http_handle, CURLOPT_DEBUGFUNCTION, my_trace);
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2008-05-23 05:20:07 +08:00
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curl_easy_setopt(http_handle, CURLOPT_VERBOSE, 1L);
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2004-05-24 23:12:37 +08:00
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/* init a multi stack */
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multi_handle = curl_multi_init();
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/* add the individual transfers */
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curl_multi_add_handle(multi_handle, http_handle);
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/* we start some action by calling perform right away */
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2010-09-30 17:33:33 +08:00
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curl_multi_perform(multi_handle, &still_running);
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2004-05-24 23:12:37 +08:00
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2012-07-23 23:34:25 +08:00
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do {
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2004-05-24 23:12:37 +08:00
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struct timeval timeout;
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int rc; /* select() return code */
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fd_set fdread;
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fd_set fdwrite;
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fd_set fdexcep;
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2010-04-24 18:14:21 +08:00
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int maxfd = -1;
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2004-05-24 23:12:37 +08:00
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2010-07-14 06:32:53 +08:00
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long curl_timeo = -1;
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2004-05-24 23:12:37 +08:00
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FD_ZERO(&fdread);
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FD_ZERO(&fdwrite);
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FD_ZERO(&fdexcep);
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/* set a suitable timeout to play around with */
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timeout.tv_sec = 1;
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timeout.tv_usec = 0;
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2010-07-14 06:32:53 +08:00
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curl_multi_timeout(multi_handle, &curl_timeo);
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if(curl_timeo >= 0) {
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timeout.tv_sec = curl_timeo / 1000;
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if(timeout.tv_sec > 1)
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timeout.tv_sec = 1;
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else
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timeout.tv_usec = (curl_timeo % 1000) * 1000;
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}
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2004-05-24 23:12:37 +08:00
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/* get file descriptors from the transfers */
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curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
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2006-10-13 22:01:19 +08:00
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/* In a real-world program you OF COURSE check the return code of the
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2010-04-24 18:14:21 +08:00
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function calls. On success, the value of maxfd is guaranteed to be
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greater or equal than -1. We call select(maxfd + 1, ...), specially in
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case of (maxfd == -1), we call select(0, ...), which is basically equal
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to sleep. */
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2006-10-13 22:01:19 +08:00
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2004-05-24 23:12:37 +08:00
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rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
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switch(rc) {
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case -1:
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/* select error */
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still_running = 0;
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printf("select() returns error, this is badness\n");
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break;
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case 0:
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default:
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/* timeout or readable/writable sockets */
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2010-09-30 17:33:33 +08:00
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curl_multi_perform(multi_handle, &still_running);
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2004-05-24 23:12:37 +08:00
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break;
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}
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2012-07-23 23:34:25 +08:00
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} while(still_running);
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2004-05-24 23:12:37 +08:00
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curl_multi_cleanup(multi_handle);
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curl_easy_cleanup(http_handle);
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return 0;
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}
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