C# 模拟web Get,Post
2015-10-22 11:50
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由于经常需要模拟web Get,Post等方法,今天将这些方法顺便整理分享。
一个不错的在线测试网站: 点击打开链接 可以模拟各种Get,Post,还可以设置body,header的参数,比较方便,强力推荐
Get:
Post (带文件)
一个不错的在线测试网站: 点击打开链接 可以模拟各种Get,Post,还可以设置body,header的参数,比较方便,强力推荐
Get:
<span style="white-space:pre"> </span>public static string HttpGet(string url, NameValueCollection content, NameValueCollection headers, Encoding encode) { string errorMsg; var webClient = new WebClient { Encoding = encode ?? Encoding.UTF8 }; webClient.Headers.Add(headers); try { webClient.QueryString.Add(content); return webClient.DownloadString(url); } catch (Exception ex) { errorMsg = ex.ToString(); } return errorMsg; }
//如果没有content和header 参数 则 new 空对象而不能为nullPost(不上传文件)
/// <summary> /// 创建POST方式的HTTP请求 /// </summary> /// <param name="url">请求的URL</param> /// <param name="parameters">随同请求POST的参数名称及参数值字典</param> /// <param name="cookies">随同HTTP请求发送的Cookie信息,如果不需要身份验证可以为空</param> /// <returns></returns> public static string HttpPost(string url, string parameters, CookieCollection cookies,Encoding encoding =null) { if (encoding == null) { encoding = Encoding.UTF8; } if (string.IsNullOrEmpty(url)) { throw new ArgumentNullException("url"); } HttpWebRequest request = null; Stream stream = null;//用于传参数的流 try { request = WebRequest.Create(url) as HttpWebRequest; request.Method = "POST"; request.ContentType = "application/x-www-form-urlencoded"; request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)"; //默认IE request.Timeout = 4000;//4秒超时 if (cookies != null) { request.CookieContainer = new CookieContainer(); request.CookieContainer.Add(cookies); } byte[] data = encoding.GetBytes(parameters); request.ContentLength = data.Length; stream = request.GetRequestStream(); stream.Write(data, 0, data.Length); stream.Close(); } catch (Exception ex) { throw ex; } finally { if (stream != null) { stream.Close(); } } var response = request.GetResponse() as HttpWebResponse; string xml = new StreamReader(response.GetResponseStream(), encoding).ReadToEnd(); return xml; }
参考:http://blog.csdn.net/haitaofeiyang/article/details/18362225 有完整的例子
Post (带文件)
/// <summary> /// post 数据 body 参数,支持文件 /// </summary> /// <param name="url"></param> /// <param name="timeOut"></param> /// <param name="fileKeyName">文件名</param> /// <param name="filePath">文件地址</param> /// <param name="stringDict">body 参数列表</param> /// <returns></returns> public static string HttpPostData(string url, int timeOut, string fileKeyName,string filePath, NameValueCollection stringDict) { string responseContent; var memStream = new MemoryStream(); var webRequest = (HttpWebRequest)WebRequest.Create(url); // 边界符 var boundary = "---------------" + DateTime.Now.Ticks.ToString("x"); // 边界符 var beginBoundary = Encoding.ASCII.GetBytes("--" + boundary + "\r\n"); var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read); // 最后的结束符 var endBoundary = Encoding.ASCII.GetBytes("--" + boundary + "--\r\n"); // 设置属性 webRequest.Method = "POST"; webRequest.Timeout = timeOut; webRequest.ContentType = "multipart/form-data; boundary=" + boundary; // 写入文件 const string filePartHeader = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n" + "Content-Type: application/octet-stream\r\n\r\n"; var header = string.Format(filePartHeader, fileKeyName, filePath); var headerbytes = Encoding.UTF8.GetBytes(header); memStream.Write(beginBoundary, 0, beginBoundary.Length); memStream.Write(headerbytes, 0, headerbytes.Length); var buffer = new byte[1024]; int bytesRead; // =0 while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0) { memStream.Write(buffer, 0, bytesRead); } // 写入字符串的Key var stringKeyHeader = "\r\n--" + boundary + "\r\nContent-Disposition: form-data; name=\"{0}\"" + "\r\n\r\n{1}\r\n"; foreach (byte[] formitembytes in from string key in stringDict.Keys select string.Format(stringKeyHeader, key, stringDict[key]) into formitem select Encoding.UTF8.GetBytes(formitem)) { memStream.Write(formitembytes, 0, formitembytes.Length); } // 写入最后的结束边界符 memStream.Write(endBoundary, 0, endBoundary.Length); webRequest.ContentLength = memStream.Length; var requestStream = webRequest.GetRequestStream(); memStream.Position = 0; var tempBuffer = new byte[memStream.Length]; memStream.Read(tempBuffer, 0, tempBuffer.Length); memStream.Close(); requestStream.Write(tempBuffer, 0, tempBuffer.Length); requestStream.Close(); var httpWebResponse = (HttpWebResponse)webRequest.GetResponse(); using (var httpStreamReader = new StreamReader(httpWebResponse.GetResponseStream(), Encoding.GetEncoding("utf-8"))) { responseContent = httpStreamReader.ReadToEnd(); } fileStream.Close(); httpWebResponse.Close(); webRequest.Abort(); return responseContent; }
参考:http://www.suchso.com/projecteactual/csharp-HttpWebRequest-post-dll.html
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