mirror of
https://github.com/moparisthebest/curl
synced 2024-11-16 14:35:03 -05:00
118 lines
3.6 KiB
C
118 lines
3.6 KiB
C
/*****************************************************************************
|
|
* _ _ ____ _
|
|
* 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>
|
|
|
|
const char data[]="this is what we post to the silly web server";
|
|
|
|
struct WriteThis {
|
|
const char *readptr;
|
|
int sizeleft;
|
|
};
|
|
|
|
static 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 0; /* 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, 1L);
|
|
|
|
/* 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, 1L);
|
|
|
|
/*
|
|
If you use POST to a HTTP 1.1 server, you can send data without knowing
|
|
the size before starting the POST if you use chunked encoding. You
|
|
enable this by adding a header like "Transfer-Encoding: chunked" with
|
|
CURLOPT_HTTPHEADER. With HTTP 1.0 or without chunked transfer, you must
|
|
specify the size in the request.
|
|
*/
|
|
#ifdef USE_CHUNKED
|
|
{
|
|
struct curl_slist *chunk = NULL;
|
|
|
|
chunk = curl_slist_append(chunk, "Transfer-Encoding: chunked");
|
|
res = curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk);
|
|
/* use curl_slist_free_all() after the *perform() call to free this
|
|
list again */
|
|
}
|
|
#else
|
|
/* Set the expected POST size. If you want to POST large amounts of data,
|
|
consider CURLOPT_POSTFIELDSIZE_LARGE */
|
|
curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, (curl_off_t)pooh.sizeleft);
|
|
#endif
|
|
|
|
#ifdef DISABLE_EXPECT
|
|
/*
|
|
Using POST with HTTP 1.1 implies the use of a "Expect: 100-continue"
|
|
header. You can disable this header with CURLOPT_HTTPHEADER as usual.
|
|
NOTE: if you want chunked transfer too, you need to combine these two
|
|
since you can only set one list of headers with CURLOPT_HTTPHEADER. */
|
|
|
|
/* A less good option would be to enforce HTTP 1.0, but that might also
|
|
have other implications. */
|
|
{
|
|
struct curl_slist *chunk = NULL;
|
|
|
|
chunk = curl_slist_append(chunk, "Expect:");
|
|
res = curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk);
|
|
/* use curl_slist_free_all() after the *perform() call to free this
|
|
list again */
|
|
}
|
|
#endif
|
|
|
|
/* Perform the request, res will get the return code */
|
|
res = curl_easy_perform(curl);
|
|
|
|
/* always cleanup */
|
|
curl_easy_cleanup(curl);
|
|
}
|
|
return 0;
|
|
}
|