/***************************************************************************** * _ _ ____ _ * 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 #include #include #include 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; CURLcode res; 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! */ return 0; }