C#的http协议的网络编程
2021-05-08 09:29
标签：c# 网络编程 using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Collections; using System.Net; using System.IO; namespace www.xinduofen.cn { /// /// C#与http服务器端进行对接的工具类 /// class HttpWebTool { /// /// 用于缓存服务器端传输到客户端的SESSIONID或者JSESSIONID /// private Cookie sessionidCookie = null; /// /// 从HttpWebServer端获取数据(使用的是"post"方式) /// /// 请求网址 /// 请求参数集合，无需参数时传入null值 /// 请求cookie集合，无需cookie时传入null值 /// public String getDatafromHttpWebServer(String url, Hashtable data,CookieCollection cookies) { String result = null; if (string.IsNullOrEmpty(url)) { return null;//传入参数异常 } byte[] data_stream = null;//将要向服务器传输的数据流内容 if (data != null && data.Count > 0) { string transportData = "";//将要向服务器传输的字符串内容 foreach (DictionaryEntry de in data) { transportData = transportData + de.Key.ToString() + "=" + de.Value.ToString() + "&";//解调出键值对数据 } transportData = transportData.TrimEnd(‘&‘);//去除字符串尾部的 & if (!string.IsNullOrEmpty(transportData)) { data_stream = Encoding.UTF8.GetBytes(transportData);//将上传字符串数据打包成数据流 } } try { HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url); //请求方式 req.Method = "POST"; //声明客户端只接收txt类型的内容 req.Accept = "text/plain"; //以键值对形式向服务器传递参数 req.ContentType = "application/x-www-form-urlencoded"; //设置cookie盒子(客户端请求的cookie和服务器端返回的cookie就放在此盒子中) CookieContainer cookieContainer = new CookieContainer(); if (sessionidCookie != null && !string.IsNullOrEmpty(sessionidCookie.Domain)) { cookieContainer.Add(sessionidCookie); } if (cookies!=null) { cookieContainer.Add(cookies);//添加调用者传入的cookie集合 } req.CookieContainer = cookieContainer; if (data_stream != null && data_stream.Length > 0) { //请求数据流的长度 req.ContentLength = data_stream.Length; using (Stream requestStream = req.GetRequestStream()) { //写入请求实体流 requestStream.Write(data_stream, 0, data_stream.Length); } } //接收返回值 using(HttpWebResponse myResponse = (HttpWebResponse)req.GetResponse()){ using (StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8)) { result = reader.ReadToEnd().Trim(); } if (myResponse.Cookies["SESSIONID"] != null) { sessionidCookie = myResponse.Cookies["SESSIONID"]; } else { if (myResponse.Cookies["JSESSIONID"] != null) { sessionidCookie = myResponse.Cookies["JSESSIONID"]; } } } }catch(Exception){ Console.WriteLine("请查看传入参数是否正确或者服务器是否关闭"); } return result; } /// /// 获得参数data的消息数据流，以"\r\n"结尾 /// /// 请求参数集合，无需参数时传入null值 /// 消息分隔符 /// private byte[] getParameterBytes(Hashtable data, String boundary) { byte[] parameterBytes = null; //如果有请求参数 if (data != null && data.Count > 0) { string parameterStr = ""; foreach (DictionaryEntry de in data) { parameterStr += "--" + boundary; parameterStr += "\r\n" + "Content-Disposition: form-data;name=\"" + de.Key.ToString() + "\""; parameterStr += "\r\n" + "Content-Type: text/plain; charset=UTF-8"; parameterStr += "\r\n\r\n" + de.Value.ToString(); parameterStr += "\r\n"; } if (!string.IsNullOrEmpty(parameterStr)) { parameterBytes = Encoding.UTF8.GetBytes(parameterStr);//将上传字符串数据打包成数据流 } } return parameterBytes; } /// /// 获得上传文件的消息头部分字符流，以"\r\n\r\n"结尾 /// /// 上传文件《控件名,上传文件的保存位置(包括"文件名"."扩展名")》 /// 消息分隔符 /// private byte[] getUploadFileDeclareBytes(DictionaryEntry de, String boundary) { byte[] uploadFileDeclareBytes = null; //上传文件的消息头描述部分 string uploadFileDeclareStr = ""; uploadFileDeclareStr += "--" + boundary; uploadFileDeclareStr += "\r\n" + "Content-Disposition: form-data;name=\"" + de.Key.ToString() + "\"; filename=\"" + de.Value.ToString() + "\""; uploadFileDeclareStr += "\r\n" + "Content-Type: application/octet-stream"; uploadFileDeclareStr += "\r\n\r\n"; if (!string.IsNullOrEmpty(uploadFileDeclareStr)) { uploadFileDeclareBytes = Encoding.UTF8.GetBytes(uploadFileDeclareStr);//将上传字符串数据打包成数据流 } return uploadFileDeclareBytes; } } } 内容所有权属于越康体育，（专业研究体质测试仪，学生体质测试仪） C#的http协议的网络编程 标签：c# 网络编程 原文地址：http://xinduofen.blog.51cto.com/8697804/1970544