84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
|
/*****************************************************************************
|
||
|
|
* _ _ ____ _
|
||
|
|
* Project ___| | | | _ \| |
|
||
|
|
* / __| | | | |_) | |
|
||
|
|
* | (__| |_| | _ <| |___
|
||
|
|
* \___|\___/|_| \_\_____|
|
||
|
|
*
|
||
|
|
* $Id$
|
||
|
|
*
|
||
|
|
* Example source code to show how the callback function can be used to
|
||
|
|
* download data into a chunk of memory instead of storing it in a file.
|
||
|
|
*
|
||
|
|
* This exact source code has not been verified to work.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* to make this work under windows, use the win32-functions from the
|
||
|
|
win32socket.c file as well */
|
||
|
|
|
||
|
|
#include "curl/curl.h"
|
||
|
|
#include "curl/types.h"
|
||
|
|
#include "curl/easy.h"
|
||
|
|
|
||
|
|
struct MemoryStruct {
|
||
|
|
char *memory;
|
||
|
|
size_t size;
|
||
|
|
};
|
||
|
|
|
||
|
|
size_t
|
||
|
|
WriteMemoryCallback(void *ptr, size_t size, size_t nmemb, void *data)
|
||
|
|
{
|
||
|
|
register int realsize = size * nmemb;
|
||
|
|
struct MemoryStruct *mem = (struct MemoryStruct *)data;
|
||
|
|
|
||
|
|
mem->memory = (char *)realloc(mem->memory, mem->size + realsize + 1);
|
||
|
|
if (mem->memory) {
|
||
|
|
memcpy(&(mem->memory[mem->size]), ptr, realsize);
|
||
|
|
mem->size += realsize;
|
||
|
|
mem->memory[mem->size] = 0;
|
||
|
|
}
|
||
|
|
return realsize;
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(int argc, char **argv)
|
||
|
|
{
|
||
|
|
CURL *curl_handle;
|
||
|
|
|
||
|
|
struct MemoryStruct chunk;
|
||
|
|
|
||
|
|
chunk.memory=NULL; /* we expect realloc(NULL, size) to work */
|
||
|
|
chunk.size = 0; /* no data at this point */
|
||
|
|
|
||
|
|
curl_global_init(CURL_GLOBAL_DEFAULT);
|
||
|
|
|
||
|
|
/* init the curl session */
|
||
|
|
curl_handle = curl_easy_init();
|
||
|
|
|
||
|
|
/* specify URL to get */
|
||
|
|
curl_easy_setopt(curl_handle, CURLOPT_URL, "http://www.cmake.org/HTML/Index.html");
|
||
|
|
|
||
|
|
/* send all data to this function */
|
||
|
|
curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
|
||
|
|
|
||
|
|
/* we pass our 'chunk' struct to the callback function */
|
||
|
|
curl_easy_setopt(curl_handle, CURLOPT_FILE, (void *)&chunk);
|
||
|
|
|
||
|
|
/* get it! */
|
||
|
|
curl_easy_perform(curl_handle);
|
||
|
|
|
||
|
|
/* cleanup curl stuff */
|
||
|
|
curl_easy_cleanup(curl_handle);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Now, our chunk.memory points to a memory block that is chunk.size
|
||
|
|
* bytes big and contains the remote file.
|
||
|
|
*
|
||
|
|
* Do something nice with it!
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* For example display it... */
|
||
|
|
write(1, chunk.memory, chunk.size);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|