C++ 爬虫代理示例

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libcurl

1#include <string>
2#include <curl/curl.h>
3#include <iostream>
4
5static size_t WriteCallback(void *contents, size_t size, size_t nmemb, void *userp)
6{
7    ((std::string*)userp)->append((char*)contents, size * nmemb);
8    return size * nmemb;
9}
10int main(void)
11{
12
13    CURL* curl;
14    CURLcode res;
15    std::string readBuffer;
16    curl = curl_easy_init();
17    if (curl) {
18
19        curl_easy_setopt(curl, CURLOPT_URL, "https://httpbin.org/ip");
20        curl_easy_setopt(curl, CURLOPT_PROXY, "http://t.16yun.cn:31111");
21        curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, "username:password");
22        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
23        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
24        /* Perform the request, res will get the return code */
25        res = curl_easy_perform(curl);
26            if(res != CURLE_OK){
27                fprintf(stderr, "curl_easy_perform() failed: %s\n",curl_easy_strerror(res));
28        }
29
30        /* always cleanup */
31        curl_easy_cleanup(curl);
32
33        std::cout << readBuffer << std::endl;
34    }
35    return 0;
36}