mirror of
https://github.com/moparisthebest/curl
synced 2024-12-22 16:18:48 -05:00
3a6563d668
All plain C examples now (mostly) adhere to the curl code style. While they are only examples, they had diverted so much and contained all sorts of different mixed code styles by now. Having them use a unified style helps users and readability. Also, as they get copy-and-pasted widely by users, making sure they're clean and nice is a good idea. 573 checksrc warnings were addressed.
152 lines
4.1 KiB
C
152 lines
4.1 KiB
C
/***************************************************************************
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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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* Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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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 https://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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/* <DESC>
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* Show how CURLOPT_DEBUGFUNCTION can be used.
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* </DESC>
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*/
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#include <stdio.h>
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#include <curl/curl.h>
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struct data {
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char trace_ascii; /* 1 or 0 */
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};
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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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char 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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fprintf(stream, "%s, %10.10ld bytes (0x%8.8lx)\n",
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text, (long)size, (long)size);
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for(i=0; i<size; i+= width) {
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fprintf(stream, "%4.4lx: ", (long)i);
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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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char *data, size_t size,
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void *userp)
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{
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struct data *config = (struct data *)userp;
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const char *text;
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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_SSL_DATA_OUT:
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text = "=> Send SSL 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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case CURLINFO_SSL_DATA_IN:
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text = "<= Recv SSL data";
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break;
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}
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dump(text, stderr, (unsigned char *)data, size, config->trace_ascii);
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return 0;
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}
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int main(void)
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{
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CURL *curl;
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CURLcode res;
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struct data config;
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config.trace_ascii = 1; /* enable ascii tracing */
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curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, my_trace);
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curl_easy_setopt(curl, CURLOPT_DEBUGDATA, &config);
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/* the DEBUGFUNCTION has no effect until we enable VERBOSE */
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curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
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/* example.com is redirected, so we tell libcurl to follow redirection */
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curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
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curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/");
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res = curl_easy_perform(curl);
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/* Check for errors */
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if(res != CURLE_OK)
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fprintf(stderr, "curl_easy_perform() failed: %s\n",
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curl_easy_strerror(res));
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/* always cleanup */
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curl_easy_cleanup(curl);
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}
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return 0;
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}
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