State

// demo.cpp : Define the entry point of a console application
    //
    
    #include "stdafx.h"
    #include "curl/curl.h"
    #pragma comment(lib, "libcurl.lib")
    //cURL callback function
    static size_t write_buff_data(char *buffer, size_t size, size_t nitems, void *outstream)
    {
        //Copy the received data to a buffer
        memcpy(outstream, buffer, nitems*size);
        return nitems*size;
    }
    /*
    Use an HTTP proxy
    */
    int GetUrlHTTP(char *url, char *buff)
    {
        CURL *curl;
        CURLcode res;
        curl = curl_easy_init();
        if (curl)
        {
            curl_easy_setopt(curl, CURLOPT_PROXY,"http://proxy server:port");//Set the HTTP proxy address
            curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, "USERNAME-zone-resi-region-gb-st-england:PASSWORD");//username and password, separated by ":"
            curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void*)buff);//Set read/write buffers
            curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_buff_data);//Set callback function
            curl_easy_setopt(curl, CURLOPT_URL, url);//Set URL address
            curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, 10L);//Set a long integer to control the number of seconds to transfer the bytes defined by CURLOPT_LOW_SPEED_LIMIT
            curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, 50L);//Set a long integer to control the number of bytes to transfer
            curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, 2000000L);//Maximum download speed
    
            res = curl_easy_perform(curl);
            curl_easy_cleanup(curl);
            if (res == CURLE_OK){
                return res;
            }else {
                printf("Error code:%d\n", res);
                MessageBox(NULL, TEXT("Get IP error"), TEXT("Helper"), MB_ICONINFORMATION | MB_YESNO);
            }
        }
        return res;
    }
    /*
    Use a SOCKS5 proxy
    */
    int GetUrlSocks5(char *url, char *buff)
    {
        CURL *curl;
        CURLcode res;
        curl = curl_easy_init();
        if (curl)
        {
            curl_easy_setopt(curl, CURLOPT_PROXY, "socks5://proxy server:port");//Set the SOCKS5 proxy address
            curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, "username:password");//username and password, separated by ":"
            curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void*)buff);//Set read/write buffers
            curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_buff_data);//Set callback function
            curl_easy_setopt(curl, CURLOPT_URL, url);//Set URL address
            curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, 10L);//Set a long integer to control the number of seconds to transfer the bytes defined by CURLOPT_LOW_SPEED_LIMIT
            curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, 50L);//Set a long integer to control the number of bytes to transfer
            curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, 2000000L);/*Maximum download speed*/
            res = curl_easy_perform(curl);
            curl_easy_cleanup(curl);
            if (res == CURLE_OK) {
                return res;
            }
            else {
                printf("Error code:%d\n", res);
                MessageBox(NULL, TEXT("Get IP error"), TEXT("Helper"), MB_ICONINFORMATION | MB_YESNO);
            }
        }
        return res;
    }
    /*
    Don't use a proxy
    */
    int GetUrl(char *url, char *buff)
    {
        CURL *curl;
        CURLcode res;
        //The cURL library used, initialize the cURL library
        curl = curl_easy_init();
        if (curl)
        {
            curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void*)buff);//Set read/write buffers
            curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_buff_data);//Set callback function
            curl_easy_setopt(curl, CURLOPT_URL, url);//Set URL address
            curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, 10L);//Set a long integer to control the number of seconds to transfer the bytes defined by CURLOPT_LOW_SPEED_LIMIT
            curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, 50L);//Set a long integer to control the number of bytes to transfer
            curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, 2000000L);/*Maximum download speed*/
            res = curl_easy_perform(curl);
            curl_easy_cleanup(curl);
            if (res == CURLE_OK)
            {
                return res;
            }
            else {
                printf("Error code:%d\n", res);
                MessageBox(NULL, TEXT("Get IP error"), TEXT("Helper"), MB_ICONINFORMATION | MB_YESNO);
            }
        }
        return res;
    }
    int main()
    {
        char *buff=(char*)malloc(1024*1024);
        memset(buff, 0, 1024 * 1024);
        //Not use an HTTP proxy
        GetUrl("http://myip.top", buff);
        printf("Not use proxy：%s\n", buff);
        //Use an HTTP proxy
        memset(buff, 0, 1024 * 1024);
        GetUrlHTTP("http://ipinfo.io", buff);
        printf("HTTP result：%s\n", buff);
        //Use a SOCKS5 proxy
        memset(buff, 0,1024 * 1024);
        GetUrlSocks5("http://ipinfo.io", buff);
        printf("SOCKS5 result：%s\n", buff);
    
        free(buff);
        Sleep(10 * 1000);//Wait 10 seconds and exit
                Wait 10 seconds and exit
        
        return 0;
    }