使用libcurl 函數庫獲取網頁數據代碼

jopen 11年前發布 | 33K 次閱讀 libcurl C/C++開發

使用libcurl 獲取網頁數據代碼

/**


    

  • File: w3G.c
    • 

  • libcurl is an open source lib for url.
*
    • 

  • Copyright: (c) T-ware Inc.
*
    • 

  • Function: get 3G data from internet
*
    • 

  • Author: Tody Guo
    • 

  • Date: 2013-10-06
*
**/
    • 



//#include "stdafx.h"


include <stdio.h>


include <curl/curl.h>


//#pragma comment(lib, "libcurl.lib")


void oops(char *msg)
{
fprintf(stderr, "%s\nReturn code: 1", msg);
exit(1);
}


size_t write_data(void buffer, size_t size, size_t nmemb, void user_p)
{
FILE f = (FILE ) user_p;


size_t return_size = fwrite(buffer, size, nmemb, f);


return return_size;
}


int main(int argc, char argv[])
{
CURL curl;
CURLcode resCode;
FILE *fp =NULL;
char url[256]="www.baidu.com";


printf("Version: %s\n", curl_version());


if (argc>=2)
{
strncpy(url, argv[1], 256);
}


curl = curl_easy_init();
if (NULL==curl)
oops("init failed!");


curl_easy_setopt(curl, CURLOPT_URL, url);


if (argc == 3)
{
fp = fopen(argv[2], "wb+");
if (fp==NULL)
oops("open file failed");
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
fprintf(stderr, "Saving to file(%s)...", argv[2]);
}


resCode = curl_easy_perform(curl);


if (resCode!=0)
oops((char *)curl_easy_strerror(resCode));


curl_easy_cleanup(curl);


if(fp != NULL)
fclose(fp);


fprintf(stderr, "\nReturn code: 0");
return 0;
}</pre>
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