测试网页是否能够打开

最新推荐文章于 2024-05-19 15:27:00 发布

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#测试 #socket #buffer #iostream #server #stream

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这是一个简单的C++程序，用于创建一个HTTP客户端，连接到指定的服务器并获取网页内容。程序通过socket API发送GET请求，并接收服务器响应。它首先解析主机名，然后建立TCP连接，发送HTTP请求，最后接收并打印HTML响应。

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/******************************
简单WEB客户机
直接连接服务器(不支持代理)
web_client.cpp
******************************/
#include <iostream>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <unistd.h>
using std::cout;
using std::endl;
using std::cerr;

int main(int argc, char** argv)
{
        const char *host_name =                         // host name
                argc > 1 ? argv[1] : "202.116.77.131";
        const int port = 80;                                 // http port

        const int buf_size = 1024 * 200;               // buffer size;
        char buffer[buf_size];                             // save html
        const char* message = "GET /index.html HTTP/1.0/n/n";

        int socket_;                                            // socket
        sockaddr_in     pin;                                 // sockaddr
        hostent    *phost;

        // get host name
        if ( (phost = gethostbyname(host_name)) == NULL )
        {
                cerr << "can not get host name!" << endl;
                return 1;
        }

        memset(buffer, 0, buf_size);                 // clear buffer
        pin.sin_family = AF_INET;
        pin.sin_addr.s_addr = htonl(INADDR_ANY);
        pin.sin_addr.s_addr = ( (struct in_addr*)
                        (phost->h_addr))->s_addr;
        pin.sin_port = htons(port);

        // create socket
        if ( (socket_ = socket(AF_INET, SOCK_STREAM, 0)) == -1)
        {
                cerr << "create socket error!" << endl;
                return 1;
        }

        // connect to server
        if ( connect(socket_, (sockaddr*)&pin, sizeof(pin) ) == -1)
        {
                cerr << "can not connect to server" << endl;
                close(socket_);
                return 1;
        }

        // send HTTP request
        if ( send(socket_, message, strlen(message), 0) == -1 )
        {
                cerr << "error in send" << endl;
                close(socket_);
                return 1;
        }

        // receive HTTP response
        if ( recv(socket_, buffer, buf_size, 0) == -1 )
        {
                cerr << "error in receiving response message..."
                         << endl;
                close(socket_);
                return 1;
        }

cout << buffer << endl;
close(socket_); // close socket

return 0;
}