如何在提琴手中捕获套接字编程的发送和接收请求

本文介绍了如何在提琴手中捕获套接字编程的发送和接收请求的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有用于在c ++中创建套接字的代码.该代码运行良好.代码为:

i have the code for creating a socket in c++.the code is running fine.the code is:

#include <winsock2.h> #include <WS2tcpip.h> #include <windows.h> #include <iostream> #pragma comment(lib,"ws2_32.lib") using namespace std; int main (){ // Initialize Dependencies to the Windows Socket. WSADATA wsaData; if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) { cout << "WSAStartup failed.\n"; system("pause"); return -1; } // We first prepare some "hints" for the "getaddrinfo" function // to tell it, that we are looking for a IPv4 TCP Connection. struct addrinfo hints; ZeroMemory(&hints, sizeof(hints)); hints.ai_family = AF_INET; // We are targeting IPv4 hints.ai_protocol = IPPROTO_TCP; // We are targeting TCP hints.ai_socktype = SOCK_STREAM; // We are targeting TCP so its SOCK_STREAM // Aquiring of the IPv4 address of a host using the newer // "getaddrinfo" function which outdated "gethostbyname". // It will search for IPv4 addresses using the TCP-Protocol. struct addrinfo* targetAdressInfo = NULL; DWORD getAddrRes = getaddrinfo("www.google", NULL, &hints, &targetAdressInfo); if (getAddrRes != 0 || targetAdressInfo == NULL) { cout << "Could not resolve the Host Name" << endl; system("pause"); WSACleanup(); return -1; } // Create the Socket Address Informations, using IPv4 // We dont have to take care of sin_zero, it is only used to extend the length of SOCKADDR_IN to the size of SOCKADDR SOCKADDR_IN sockAddr; sockAddr.sin_addr = ((struct sockaddr_in*) targetAdressInfo->ai_addr)->sin_addr; // The IPv4 Address from the Address Resolution Result sockAddr.sin_family = AF_INET; // IPv4 sockAddr.sin_port = htons(80); // HTTP Port: 80 // We have to free the Address-Information from getaddrinfo again freeaddrinfo(targetAdressInfo); // Creation of a socket for the communication with the Web Server, // using IPv4 and the TCP-Protocol SOCKET webSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (webSocket == INVALID_SOCKET) { cout << "Creation of the Socket Failed" << endl; system("pause"); WSACleanup(); return -1; } // Establishing a connection to the web Socket cout << "Connecting...\n"; if(connect(webSocket, (SOCKADDR*)&sockAddr, sizeof(sockAddr)) != 0) { cout << "Could not connect"; system("pause"); closesocket(webSocket); WSACleanup(); return -1; } cout << "Connected.\n"; // Sending a HTTP-GET-Request to the Web Server const char* httpRequest = "GET / HTTP/1.1\r\nHost: www.google\r\nConnection: close\r\n\r\n"; int sentBytes = send(webSocket, httpRequest, strlen(httpRequest),0); if (sentBytes < strlen(httpRequest) || sentBytes == SOCKET_ERROR) { cout << "Could not send the request to the Server" << endl; system("pause"); closesocket(webSocket); WSACleanup(); return -1; } // Receiving and Displaying an answer from the Web Server char buffer[10000]; ZeroMemory(buffer, sizeof(buffer)); int dataLen; while ((dataLen = recv(webSocket, buffer, sizeof(buffer), 0) > 0)) { int i = 0; while (buffer[i] >= 32 || buffer[i] == '\n' || buffer[i] == '\r') { cout << buffer[i]; i += 1; } } // Cleaning up Windows Socket Dependencies closesocket(webSocket); WSACleanup(); system("pause"); return 0; }

我想在发送和接收请求时在提琴手中捕获请求和响应，但是提琴手无法捕获它.预先感谢

I want to capture the request and response in fiddler while sending and receiving the request but fiddler is not catching it. thanks in advance

推荐答案

Fiddler将其自身作为HTTP代理服务器插入到堆栈中.它依靠Web浏览器来识别PC上配置了一个代理，并通过该代理进行发送.您的代码无法检测到要发送的代理-因此Fiddler将无法监视您的流量.

Fiddler inserts itself into the stack as an HTTP proxy server. It relies on the web browsers to recognize that there is a proxy configured on the PC and to send through that. Your code does not detect for a proxy to send through - so Fiddler won't be able to monitor your traffic.

您有几种选择.

由于您拥有Windows，因此只需从使用直接套接字切换到使用 WinInet HTTP API.它会为您执行自动代理检测，而您无需考虑它.如果需要，它将也执行代理身份验证.

Since you are own Windows, just switch from using direct sockets to using the WinInet HTTP API. It will do automatic proxy detection for you without you having to think about it. It will do the proxy authentication as well if its required.

OR.使用 Wireshark 或 NetMon 而不是Fiddler来分析您的流量.

OR. Use Wireshark or NetMon to analyze your traffic instead of Fiddler.

我建议使用#1，因为这意味着您的代码将在真正的代理服务器(通常在企业网络上找到)存在的情况下工作，而Fiddler会使用它.

I'd recommend #1 since that means your code will work in the presence of a real proxy server (commonly found on enterprise networks) and Fiddler will just work with it.

我想有第三个选项，您可以自动检测浏览器的代理设置，然后为代理创建一个套接字，使用HTTP PROXY协议，等等……但这不是最佳实践.

I suppose there is a third option where you auto-detect the browser proxy settings, then create a socket to the proxy, speak the HTTP PROXY protocol, etc... but that's not the best practice.