.net HttpWebRequest 模拟form提交

static void Main(string[] args)

        {

            //string URLAuth = "https://technet.rapaport.com/HTTP/Authenticate.aspx";

            //WebClient webClient = new WebClient();



           

            //formData["Username"] = "myUser";

            //formData["Password"] = "myPassword";



            //byte[] responseBytes = webClient.UploadValues(URLAuth, "POST", formData);

            //string resultAuthTicket = Encoding.UTF8.GetString(responseBytes);

            //webClient.Dispose();



            string URL = "http://localhost:8302/upload";

            string boundary = "----------------------------" + DateTime.Now.Ticks.ToString("x");

            System.Net.WebRequest webRequest = System.Net.WebRequest.Create(URL);



            webRequest.Method = "POST";

            webRequest.ContentType = "multipart/form-data; boundary=" + boundary;



            string FilePath = @"C:\Users\Public\Pictures\Sample Pictures\aa.jpg";

            NameValueCollection formData = new NameValueCollection();

            formData["ReplaceAll"] = "false";



            Stream postDataStream = GetPostStream(FilePath, formData, boundary);



            webRequest.ContentLength = postDataStream.Length;

            Stream reqStream = webRequest.GetRequestStream();



            postDataStream.Position = 0;



            byte[] buffer = new byte[1024];

            int bytesRead = 0;



            while ((bytesRead = postDataStream.Read(buffer, 0, buffer.Length)) != 0)

            {

                reqStream.Write(buffer, 0, bytesRead);

            }



            postDataStream.Close();

            reqStream.Close();



            StreamReader sr = new StreamReader(webRequest.GetResponse().GetResponseStream());

            string Result = sr.ReadToEnd();

        }

View Code

private static Stream GetPostStream(string filePath, NameValueCollection formData, string boundary)

        {

            Stream postDataStream = new System.IO.MemoryStream();



            //adding form data

            string formDataHeaderTemplate = Environment.NewLine + "--" + boundary + Environment.NewLine +

            "Content-Disposition: form-data; name=\"{0}\";" + Environment.NewLine + Environment.NewLine + "{1}";



            foreach (string key in formData.Keys)

            {

                byte[] formItemBytes = System.Text.Encoding.UTF8.GetBytes(string.Format(formDataHeaderTemplate,

                key, formData[key]));

                postDataStream.Write(formItemBytes, 0, formItemBytes.Length);

            }



            //adding file data

            FileInfo fileInfo = new FileInfo(filePath);



            string fileHeaderTemplate = Environment.NewLine + "--" + boundary + Environment.NewLine +

            "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"" +

            Environment.NewLine + "Content-Type: image/jpeg" + Environment.NewLine + Environment.NewLine;



            byte[] fileHeaderBytes = System.Text.Encoding.UTF8.GetBytes(string.Format(fileHeaderTemplate,

            "UploadCSVFile", fileInfo.FullName));



            postDataStream.Write(fileHeaderBytes, 0, fileHeaderBytes.Length);



            FileStream fileStream = fileInfo.OpenRead();



            byte[] buffer = new byte[1024];



            int bytesRead = 0;



            while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)

            {

                postDataStream.Write(buffer, 0, bytesRead);

            }



            fileStream.Close();



            byte[] endBoundaryBytes = System.Text.Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");

            postDataStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);



            return postDataStream;

        }

View Code