c语言 使用curl实现https请求

    实现curl https的GET请求，使用的是无验证的方式，不太安全。 需要验证的方式还没搞定，等搞定的在更新。

#include <stdio.h>
#include <stdlib.h>
#include <curl/curl.h>
#include <string.h>

struct MemoryStruct {
	char *memory;
	size_t size;

};

static size_t WriteMemoryCallback(void *contents, size_t size, size_t nmemb, void *userp)
{

	size_t realsize = size * nmemb;
	struct MemoryStruct *mem = (struct MemoryStruct*) userp;
	mem->memory = realloc(mem->memory, mem->size + realsize + 1);
	if (mem->memory == NULL) {

		/* out of memory! */

		printf("not enough memory (realloc returned NULL)\n");

		return 0;

	}

	memcpy(&(mem->memory[mem->size]), contents, realsize);
	mem->size += realsize;
	mem->memory[mem->size] = 0;
	return realsize;

}

int httpsget(void)

{

	CURL *curl = NULL;
	CURLcode res;
	struct MemoryStruct chunk;
	chunk.memory = malloc(1); /* will be grown as needed by the realloc above */
	chunk.size = 0; /* no data at this point */
	curl_global_init(CURL_GLOBAL_ALL);
	/* get a curl handle */
	curl = curl_easy_init();
	if (!curl) {
		return -1;
	}

	/*设置easy handle属性*/
	/* specify URL */
	curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "GET");
	curl_easy_setopt(curl, CURLOPT_URL, "https://www.baidu.com");
	/* Define our callback to get called when there's data to be written */
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
	/* Set a pointer to our struct to pass to the callback */
	curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);
	/* set commom option */
	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
	/*执行数据请求*/
	res = curl_easy_perform(curl);

	if (res != CURLE_OK) {

		fprintf(stderr, "res=%d curl_easy_perform() failed: %s\n",

				res,curl_easy_strerror(res));

	}

// 释放资源
	free(chunk.memory);
	curl_easy_cleanup(curl);
	curl_global_cleanup();
	return 0;

}

int main(void) 
{

	httpsget();
	return 0;

}