327 lines
8.1 KiB
C++
327 lines
8.1 KiB
C++
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#include <iostream>
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#include <string>
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#include <regex>
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#include <sstream>
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#include <iomanip>
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#include "HttpHelper.h"
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#pragma comment(lib, "Ws2_32.lib")
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std::string HttpHelper::HttpRequest(const std::string& host, const std::string& port,
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const std::string& path, const std::string& method,
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const std::string& data)
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{
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WSADATA wsaData;
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SOCKET ConnectSocket = INVALID_SOCKET;
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struct addrinfo* result = nullptr, hints;
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int iResult;
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std::string response;
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// 初始化Winsock
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iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
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if (iResult != 0)
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{
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std::cerr << "WSAStartup失败: " << iResult << std::endl;
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return "";
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}
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ZeroMemory(&hints, sizeof(hints));
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hints.ai_family = AF_UNSPEC; // 支持IPv4或IPv6
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_protocol = IPPROTO_TCP; // 使用TCP协议
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// 解析服务器地址和端口
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iResult = getaddrinfo(host.c_str(), port.c_str(), &hints, &result);
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if (iResult != 0)
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{
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std::cerr << "getaddrinfo失败: " << iResult << std::endl;
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WSACleanup();
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return "";
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}
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// 尝试连接到第一个解析出的地址
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struct addrinfo* ptr = result;
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ConnectSocket = socket(ptr->ai_family, ptr->ai_socktype, ptr->ai_protocol);
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if (ConnectSocket == INVALID_SOCKET)
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{
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std::cerr << "socket创建失败: " << WSAGetLastError() << std::endl;
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freeaddrinfo(result);
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WSACleanup();
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return "";
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}
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// 连接到服务器
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iResult = connect(ConnectSocket, ptr->ai_addr, (int)ptr->ai_addrlen);
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if (iResult == SOCKET_ERROR)
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{
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closesocket(ConnectSocket);
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ConnectSocket = INVALID_SOCKET;
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std::cerr << "无法连接到服务器!" << std::endl;
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freeaddrinfo(result);
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WSACleanup();
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return "";
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}
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freeaddrinfo(result);
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// 准备HTTP请求
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std::string request;
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if (method == "GET")
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{
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request = method + " " + path + " HTTP/1.1\r\n";
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request += "Host: " + host + "\r\n";
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request += "Connection: close\r\n\r\n";
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}
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else if (method == "POST")
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{
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request = method + " " + path + " HTTP/1.1\r\n";
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request += "Host: " + host + "\r\n";
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request += "Content-Type: application/x-www-form-urlencoded\r\n";
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request += "Content-Length: " + std::to_string(data.length()) + "\r\n";
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request += "Connection: close\r\n\r\n";
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request += data;
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}
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else
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{
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std::cerr << "无效的HTTP方法: " << method << std::endl;
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closesocket(ConnectSocket);
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WSACleanup();
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return "";
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}
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// 发送HTTP请求
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iResult = send(ConnectSocket, request.c_str(), (int)request.length(), 0);
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if (iResult == SOCKET_ERROR)
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{
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std::cerr << "发送失败: " << WSAGetLastError() << std::endl;
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closesocket(ConnectSocket);
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WSACleanup();
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return "";
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}
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// 接收HTTP响应
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const int bufSize = 512;
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char recvbuf[bufSize];
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do
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{
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iResult = recv(ConnectSocket, recvbuf, bufSize, 0);
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if (iResult > 0)
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{
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response.append(recvbuf, iResult);
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}
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else if (iResult == 0)
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{
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// 连接关闭
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break;
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}
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else
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{
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std::cerr << "接收失败: " << WSAGetLastError() << std::endl;
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break;
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}
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} while (iResult > 0);
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// 清理资源
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closesocket(ConnectSocket);
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WSACleanup();
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return response;
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}
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static void ParseURL(const std::string& url, std::string& host, std::string& port, std::string& path)
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{
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// 使用正则表达式解析URL
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std::regex url_regex(R"(^(http://|https://)?([^:/\s]+)(:([0-9]+))?([^?\s]*)?.*$)",
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std::regex::icase);
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std::smatch url_match_result;
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if (std::regex_match(url, url_match_result, url_regex))
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{
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std::string protocol = url_match_result[1].str();
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host = url_match_result[2].str();
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port = url_match_result[4].str();
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path = url_match_result[5].str();
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if (path.empty())
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path = "/";
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if (port.empty())
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{
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if (!protocol.empty() && protocol == "https://")
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port = "443"; // HTTPS默认端口
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else
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port = "80"; // HTTP默认端口
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}
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// 检查是否为HTTPS协议
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if (!protocol.empty() && protocol == "https://")
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{
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// 注意：此示例不支持HTTPS协议
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std::cerr << "当前示例不支持HTTPS协议。" << std::endl;
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}
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}
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else
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{
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std::cerr << "URL解析失败。" << std::endl;
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}
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}
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static void ParseHttpResponse(const std::string& response, std::string& header, std::string& body)
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{
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// 查找header和body之间的分隔符（\r\n\r\n）
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size_t pos = response.find("\r\n\r\n");
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if (pos != std::string::npos)
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{
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// 提取header
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header = response.substr(0, pos);
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// 提取body（包括可能的chunked编码）
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std::string raw_body = response.substr(pos + 4);
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// 检查是否为chunked编码
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std::regex transfer_encoding_regex(R"(Transfer-Encoding:\s*chunked)", std::regex::icase);
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if (std::regex_search(header, transfer_encoding_regex))
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{
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// 解析chunked编码的body
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body = "";
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std::istringstream stream(raw_body);
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std::string line;
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while (std::getline(stream, line))
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{
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// 移除可能的\r字符
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if (!line.empty() && line.back() == '\r')
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line.pop_back();
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// 如果行为空，则跳过
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if (line.empty())
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continue;
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// 解析chunk大小
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std::istringstream size_stream(line);
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size_t chunk_size;
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size_stream >> std::hex >> chunk_size;
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if (chunk_size == 0)
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{
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// 读取到最后一个chunk，结束
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break;
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}
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// 读取chunk数据
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std::string chunk_data(chunk_size, '\0');
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stream.read(&chunk_data[0], chunk_size);
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body += chunk_data;
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// 读取\r\n
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stream.get();
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if (stream.peek() == '\n')
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stream.get();
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}
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}
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else
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{
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// 非chunked编码，直接将raw_body赋值给body
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body = raw_body;
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}
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}
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else
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{
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// 未找到分隔符，视为没有header
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header = "";
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body = response;
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}
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}
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static int GetStatusCode(const std::string& header)
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{
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std::regex status_line_regex(R"(HTTP/\d\.\d\s+(\d{3}))");
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std::smatch match;
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if (std::regex_search(header, match, status_line_regex))
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{
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return std::stoi(match[1]);
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}
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return -1;
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}
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static std::string GetLocation(const std::string& header)
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{
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std::regex location_regex(R"(Location:\s*(.+))", std::regex::icase);
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std::smatch match;
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if (std::regex_search(header, match, location_regex))
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{
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// 移除可能的\r字符
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std::string location = match[1];
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location.erase(std::remove(location.begin(), location.end(), '\r'), location.end());
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return location;
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}
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return "";
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}
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#include "../Utils/Utils.h"
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std::string HttpHelper::HttpRequestGet(const std::string& url)
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{
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const int redirect_limit = 10;
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std::string current_url = url;
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int redirects = 0;
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while (redirects <= redirect_limit)
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{
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std::string host, port, path;
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ParseURL(current_url, host, port, path);
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auto response = HttpRequest(host, port, path, "GET", "");
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std::string header, body;
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ParseHttpResponse(response, header, body);
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// 获取HTTP状态码
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int status_code = GetStatusCode(header);
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// 检查是否需要重定向
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if (status_code >= 300 && status_code < 400)
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{
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std::string location = GetLocation(header);
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if (location.empty())
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{
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std::cerr << "重定向时未找到Location头部，停止。" << std::endl;
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return "";
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}
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// 处理相对URL
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if (location.find("http://") != 0 && location.find("https://") != 0)
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{
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// 如果Location是相对路径，构建完整的URL
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if (location[0] != '/')
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{
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location = "/" + location;
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}
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location = "http://" + host + location;
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}
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// 更新current_url，准备下一次请求
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current_url = location;
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redirects++;
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continue; // 继续下一个循环
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}
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else
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{
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// 非重定向状态码，处理响应内容
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// 解析头部，检查Content-Encoding
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auto headers = StringHelper::Split(header, { '\r', '\n' });
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for (const auto& h : headers)
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{
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if (h.find("Content-Encoding: gzip") != std::string::npos)
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{
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// 调用GDecompress解压缩
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auto dec = GDecompress((uint8_t*)body.data(), body.size());
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body = std::string((char*)dec.data(), dec.size());
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break;
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}
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}
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return body;
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}
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}
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std::cerr << "重定向次数超过限制（" << redirect_limit << "次），停止。" << std::endl;
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return "";
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}
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std::string HttpHelper::HttpRequestPost(const std::string& url, const std::string& data)
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{
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std::string host, port, path;
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ParseURL(url, host, port, path);
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return HttpRequest(host, port, path, "POST", data);
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}
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