DS>> Really, you should then probably just go back to the working version and
try again.
DS>> The problem is quite clearly that the logic in your code is broken.
Ok, I did it.
And, as with my code, I cannot make working getinmemory.c with its
WriteMemoryCallback.
I hardly believe I'm doing something wrong since I just did cut/paste that in
my code.
Therefore, I must ask to, please, take a look at this setup and try again your
getinmemory.c, please.
I'm on libcurl/7.19.7 GnuTLS/2.8.5 zlib/1.2.3.3 libidn/1.15
Here's the setup. Code behaviour/results are explained in the comments.
#include <curl/curl.h>
#include <curl/easy.h>
struct MemoryStruct { // Global scope
char *memory;
size_t size;
};
// This is in main():
.....
curl_global_init(CURL_GLOBAL_ALL);
sessionA = curl_easy_init();
if(sessionA) {
struct MemoryStruct chunk;
chunk.memory = (char *)malloc(1);
chunk.size = 0;
curl_easy_setopt(sessionA, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
curl_easy_setopt(sessionA, CURLOPT_WRITEDATA, (void *)&chunk);
curl_easy_setopt(sessionA, CURLOPT_URL, UndrlURL.c_str());
cout << chunk.size << " =chunk.size\t" << (void *)chunk.memory << "
=chunk.memory\n";
// (#) Here I see valid data: 0 =chunk.size, 0xa175418 =chunk.memory
// Then, this calls WriteMemoryCallback
//
result = curl_easy_perform(sessionA);
.....
// The call back write function is just cut/paste from getinmemory.c:
static size_t WriteMemoryCallback(void *ptr, size_t size, size_t nmemb, void
*data)
{
size_t realsize = size * nmemb;
struct MemoryStruct *mem = (struct MemoryStruct *)data;
cout << (mem->size) << " =mem->size\t" << (void *)(mem->memory) << "
=mem->memory\n";
/*
* At the very 1st call of WriteMemoryCallback I see INVALID data,
different from (#):
* 3079409664 =mem->size, 0xfbad2c84 =mem->memory
* What changes these values??? They must be identical to (#).
*
* Then, the huge (mem->size) brings realloc in segmentation-fault ALL
the times.
* The code never executes beyond here.
*/
mem->memory = (char *)realloc(mem->memory, mem->size + realsize + 1);
if (mem->memory == NULL) {
/* out of memory! */
printf("not enough memory (realloc returned NULL)\n");
exit(EXIT_FAILURE);
}
memcpy(&(mem->memory[mem->size]), ptr, realsize);
mem->size += realsize;
mem->memory[mem->size] = 0;
return realsize;
}
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