写在前面
开发中也会经常用到模拟请求的东东，有时候提交的数据比较大，一般的方式就不行了，这个时候，下面的方式就会更好的解决你的问题。
方法
提交的数据比较大的时候，就会用到这个方法，当然可以对该方法进行修改一下，也可以提交文件。
////// 提交大数据量 /// /// /// ///public static string PostBigString(string url, string postData) { 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 = 40000; 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, "", ""); var headerbytes = Encoding.UTF8.GetBytes(header); memStream.Write(beginBoundary, 0, beginBoundary.Length); memStream.Write(headerbytes, 0, headerbytes.Length); var buffer = Encoding.UTF8.GetBytes(postData); // 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"; string formitem = string.Format(stringKeyHeader, "value", postData); byte[] formitembytes = 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(); //加入这行会报错！ var httpWebResponse = (HttpWebResponse)webRequest.GetResponse(); using (var httpStreamReader = new StreamReader(httpWebResponse.GetResponseStream(), Encoding.GetEncoding("utf-8"))) { responseContent = httpStreamReader.ReadToEnd(); } httpWebResponse.Close(); webRequest.Abort(); return responseContent; }
普通的模拟post请求的方法
////// post请求 /// /// 请求的地址 /// 参数 ///public static string PostString(string url, string postdata) { string strJson = string.Empty; try { byte[] buffer = Encoding.UTF8.GetBytes(postdata); HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url); request.Method = "POST"; request.Accept = "application/json;charset:utf-8"; request.ContentType = "application/x-www-form-urlencoded"; request.ContentLength = buffer.Length; using (Stream requestStream = request.GetRequestStream()) { requestStream.Write(buffer, 0, buffer.Length); } using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) { using (StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8)) { strJson = sr.ReadToEnd(); } } return strJson; } catch (Exception ex) { throw ex; } }
对于一般的post请求，上面的方法已经能解决了，但是对应提交的数据比较大的时候，上面的这个方法就会显得力不从心了。
总结
在项目中，经常用到模拟请求某个接口的情况，不想每次都去f12查看请求头的东西，这也算总结一下，方便以后的使用。