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//
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// NetworkRequest.cpp
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//
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// Created by duzixi.com on 15/8/25.
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//
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#include "NetworkRequest.h"
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using namespace std;
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using boost::asio::ip::tcp;
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/// POST请求
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string PostRequest(char* host, char* path, string form) {
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long length = form.length();
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// 声明Asio基础: io_service（任务调度机）
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boost::asio::io_service io_service;
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// 获取服务器终端列表
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tcp::resolver resolver(io_service);
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tcp::resolver::query query(host, "http");
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tcp::resolver::iterator iter = resolver.resolve(query);
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// 尝试连接每一个终端，直到成功建立socket连接
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tcp::socket socket(io_service);
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boost::asio::connect(socket, iter);
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// 构建网络请求头
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// 指定 "Connection: close" 在获取应答后断开连接，确保获文件全部数据。
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boost::asio::streambuf request;
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ostream request_stream(&request);
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request_stream << "POST " << path << " HTTP/1.1\r\n";
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request_stream << "Host: " << host << "\r\n";
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request_stream << "Accept: */*\r\n";
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request_stream << "Content-Type:application/x-www-form-urlencoded\r\n";
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request_stream << "Content-Length: " << length << "\r\n";
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request_stream << "Connection: close\r\n\r\n"; // 注意这里是两个空行
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request_stream << form; //POST 发送的数据本身不包含多于空行
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// 发送请求
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boost::asio::write(socket, request);
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// 读取应答状态. 应答缓冲流 streambuf 会自动增长至完整的行
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// 该增长可以在构造缓冲流时通过设置最大值限制
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boost::asio::streambuf response;
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boost::asio::read_until(socket, response, "\r\n");
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// 检查应答是否OK.
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istream response_stream(&response);// 应答流
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string http_version;
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response_stream >> http_version;
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unsigned int status_code;
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response_stream >> status_code;
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string status_message;
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getline(response_stream, status_message);
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if (!response_stream || http_version.substr(0, 5) != "HTTP/") {
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printf("无效响应\n");
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}
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if (status_code != 200) {
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printf("响应返回 status code %d\n", status_code);
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}
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// 读取应答头部，遇到空行后停止
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boost::asio::read_until(socket, response, "\r\n\r\n");
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// 显示应答头部
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string header;
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int len = 0;
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while (getline(response_stream, header) && header != "\r") {
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if (header.find("Content-Length: ") == 0) {
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stringstream stream;
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stream << header.substr(16);
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stream >> len;
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}
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}
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long size = response.size();
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if (size > 0) {
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// .... do nothing
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}
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// 循环读取数据流，直到文件结束
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boost::system::error_code error;
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while (boost::asio::read(socket, response, boost::asio::transfer_at_least(1), error)) {
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// 获取应答长度
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size = response.size();
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if (len != 0) {
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cout << size << " Byte " << (size * 100) / len << "%\n";
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}
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}
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if (error != boost::asio::error::eof) {
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throw boost::system::system_error(error);
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}
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cout << size << " Byte 内容已下载完毕." << endl;
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// 将streambuf类型转换为string类型返回
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istream is(&response);
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is.unsetf(ios_base::skipws);
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string sz;
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sz.append(istream_iterator<char>(is), istream_iterator<char>());
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// 返回转换后的字符串
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return sz;
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}
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/// GET请求
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string GetRequest(char* host, char* path) {
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// 声明Asio基础: io_service（任务调度机）
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boost::asio::io_service io_service;
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// 获取服务器终端列表
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tcp::resolver resolver(io_service);
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tcp::resolver::query query(host, "http");
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tcp::resolver::iterator iter = resolver.resolve(query);
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// 尝试连接每一个终端，直到成功建立socket连接
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tcp::socket socket(io_service);
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boost::asio::connect(socket, iter);
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// 构建网络请求头.
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// 指定 "Connection: close" 在获取应答后断开连接，确保获文件全部数据。
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boost::asio::streambuf request;
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ostream request_stream(&request);
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request_stream << "GET " << path << " HTTP/1.1\r\n";
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request_stream << "Host: " << host << "\r\n";
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request_stream << "Accept: */*\r\n";
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request_stream << "Connection: close\r\n\r\n";
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// 发送请求
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boost::asio::write(socket, request);
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// 读取应答状态. 应答缓冲流 streambuf 会自动增长至完整的行
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// 该增长可以在构造缓冲流时通过设置最大值限制
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boost::asio::streambuf response;
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boost::asio::read_until(socket, response, "\r\n");
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// 检查应答是否OK.
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istream response_stream(&response);
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string http_version;
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response_stream >> http_version;
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unsigned int status_code;
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response_stream >> status_code;
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string status_message;
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getline(response_stream, status_message);
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if (!response_stream || http_version.substr(0, 5) != "HTTP/") {
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printf("响应无效\n");
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}
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if (status_code != 200) {
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printf("响应返回 status code %d\n", status_code);
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}
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// 读取应答头部，遇到空行后停止
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boost::asio::read_until(socket, response, "\r\n\r\n");
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// 显示应答头部
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string header;
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int len = 0;
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while (getline(response_stream, header) && header != "\r") {
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if (header.find("Content-Length: ") == 0) {
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stringstream stream;
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stream << header.substr(16);
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stream >> len;
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}
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}
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long size = response.size();
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if (size > 0) {
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// ... do nothing ...
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}
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boost::system::error_code error; // 读取错误
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// 循环读取数据流，直到文件结束
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while (boost::asio::read(socket, response, boost::asio::transfer_at_least(1), error)) {
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// 获取应答长度
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size = response.size();
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if (len != 0) {
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cout << size << " Byte " << (size * 100) / len << "%" << endl;
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}
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}
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// 如果没有读到文件尾，抛出异常
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if (error != boost::asio::error::eof) {
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throw boost::system::system_error(error);
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}
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cout << size << " Byte 内容已下载完毕." << endl;
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// 将streambuf类型转换为string类型，并返回
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istream is(&response);
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is.unsetf(ios_base::skipws);
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string sz;
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sz.append(istream_iterator<char>(is), istream_iterator<char>());
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return sz;
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}
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/// GET请求(重载)
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string GetRequest(string url) {
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size_t index;
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// 去掉url中的协议头
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if (url.find("http://") != string::npos) {
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url = url.substr(7);
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}
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printf("url:%s\n", url.c_str());
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// 截取host字符串
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index = url.find("/");
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char* host = new char[index];
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strcpy(host, url.substr(0, index).c_str());
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// 截取urlPath字符串
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char* urlPath = new char[url.length() - index + 1];
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strcpy(urlPath, url.substr(index, url.length() - index).c_str());
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return GetRequest(host, urlPath);
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} |
