mirror of https://github.com/moparisthebest/curl
90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
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/*****************************************************************************
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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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* $Id$
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*
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* An example source code that issues a HTTP POST and we provide the actual
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* data through a read callback.
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*
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* Please be aware of the fact that the size of the posted data MUST be
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* specified before the transfer is being made (with CURLOPT_POSTFIELDSIZE).
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* This requirement will change when libcurl starts supporting chunked-encoded
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* sends.
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*
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* This example requires libcurl 7.9.6 or later.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <curl/curl.h>
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#if LIBCURL_VERSION_NUM < 0x070906
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#error this example source requires libcurl 7.9.6 or newer
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#endif
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char data[]="this is what we post to the silly web server";
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struct WriteThis {
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char *readptr;
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int sizeleft;
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};
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size_t read_callback(void *ptr, size_t size, size_t nmemb, void *userp)
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{
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struct WriteThis *pooh = (struct WriteThis *)userp;
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if(size*nmemb < 1)
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return 0;
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if(pooh->sizeleft) {
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*(char *)ptr = pooh->readptr[0]; /* copy one single byte */
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pooh->readptr++; /* advance pointer */
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pooh->sizeleft--; /* less data left */
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return 1; /* we return 1 byte at a time! */
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}
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return -1; /* no more data left to deliver */
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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 WriteThis pooh;
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pooh.readptr = data;
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pooh.sizeleft = strlen(data);
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curl = curl_easy_init();
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if(curl) {
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/* First set the URL that is about to receive our POST. */
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curl_easy_setopt(curl, CURLOPT_URL,
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"http://receivingsite.com.pooh/index.cgi");
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/* Now specify we want to POST data */
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curl_easy_setopt(curl, CURLOPT_POST, TRUE);
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/* Set the expected POST size */
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curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, pooh.sizeleft);
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/* we want to use our own read function */
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curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);
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/* pointer to pass to our read function */
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curl_easy_setopt(curl, CURLOPT_INFILE, &pooh);
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/* get verbose debug output please */
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curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
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/* Perform the request, res will get the return code */
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res = curl_easy_perform(curl);
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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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