| /***************************************************************************** |
| * _ _ ____ _ |
| * Project ___| | | | _ \| | |
| * / __| | | | |_) | | |
| * | (__| |_| | _ <| |___ |
| * \___|\___/|_| \_\_____| |
| * |
| * $Id$ |
| * |
| * An example source code that issues a HTTP POST and we provide the actual |
| * data through a read callback. |
| * |
| */ |
| #include <stdio.h> |
| #include <string.h> |
| #include <curl/curl.h> |
| |
| char data[]="this is what we post to the silly web server"; |
| |
| struct WriteThis { |
| char *readptr; |
| int sizeleft; |
| }; |
| |
| size_t read_callback(void *ptr, size_t size, size_t nmemb, void *userp) |
| { |
| struct WriteThis *pooh = (struct WriteThis *)userp; |
| |
| if(size*nmemb < 1) |
| return 0; |
| |
| if(pooh->sizeleft) { |
| *(char *)ptr = pooh->readptr[0]; /* copy one single byte */ |
| pooh->readptr++; /* advance pointer */ |
| pooh->sizeleft--; /* less data left */ |
| return 1; /* we return 1 byte at a time! */ |
| } |
| |
| return -1; /* no more data left to deliver */ |
| } |
| |
| int main(void) |
| { |
| CURL *curl; |
| CURLcode res; |
| |
| struct WriteThis pooh; |
| |
| pooh.readptr = data; |
| pooh.sizeleft = strlen(data); |
| |
| curl = curl_easy_init(); |
| if(curl) { |
| /* First set the URL that is about to receive our POST. */ |
| curl_easy_setopt(curl, CURLOPT_URL, |
| "http://receivingsite.com.pooh/index.cgi"); |
| /* Now specify we want to POST data */ |
| curl_easy_setopt(curl, CURLOPT_POST, TRUE); |
| |
| /* Set the expected POST size */ |
| curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, pooh.sizeleft); |
| |
| /* we want to use our own read function */ |
| curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback); |
| |
| /* pointer to pass to our read function */ |
| curl_easy_setopt(curl, CURLOPT_READDATA, &pooh); |
| |
| /* get verbose debug output please */ |
| curl_easy_setopt(curl, CURLOPT_VERBOSE, 1); |
| |
| /* Perform the request, res will get the return code */ |
| res = curl_easy_perform(curl); |
| |
| /* always cleanup */ |
| curl_easy_cleanup(curl); |
| } |
| return 0; |
| } |