一个更好用的http库 -- libcurl，送上简单示例代码

发现一个比ghttp更好的HTTP库, 它不仅支持http，也支持https.

struct MemoryStruct {

char *data;

size_t size;

};

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;

mem->data = realloc(mem->data, mem->size + realsize + 1);

if (mem->data) {

memcpy(&(mem->data[mem->size]), ptr, realsize);

mem->size += realsize;

mem->data[mem->size] = 0;

}

return realsize;

}

int load_net_file(const char *uri, long *httpCode, struct MemoryStruct *chunk)

{

CURL *curl = NULL;

CURLcode cret;

if(!uri || !chunk)

return -1;

curl = curl_easy_init();

if(!curl) {

fprintf(stderr, "Failed to init curl.");

return -1;

}

if(httpCode)

*httpCode = 0;

chunk->size = 0;

chunk->data = NULL;

curl_easy_setopt(curl, CURLOPT_URL, uri);

curl_easy_setopt(curl, CURLOPT_TIMEOUT, 30);

curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 10);

curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)chunk);

curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);

/* NOTE: It must be set, otherwise it will crash when timeout */

curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1L);

#if 0

curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);

#endif

cret = curl_easy_perform(curl);

if(cret == CURLE_OK) {

curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, httpCode);

curl_easy_cleanup(curl);

return 0;

}

/* Error case */

curl_easy_cleanup(curl);

if(cret == CURLE_URL_MALFORMAT) {

/* Handle it */

}

else if(cret == CURLE_OPERATION_TIMEDOUT) {

/* Handle it */

}

return -1;

}