1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
/*****************************************************************************
* _ _ ____ _
* 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 <stdio.h>
#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 */
/* init the curl session */
curl_handle = curl_easy_init();
/* specify URL to get */
curl_easy_setopt(curl_handle, CURLOPT_URL, "http://cool.haxx.se/");
/* 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!
*
* You should be aware of the fact that at this point we might have an
* allocated data block, and nothing has yet deallocated that data. So when
* you're done with it, you should free() it as a nice application.
*/
return 0;
}
|
