enabling POST in httpwebrequest file upload

Question

I need to upload files (with different extensions ie .txt, .jpg, .pdf....) on a server. I created a site that accepts http requests an maps a virtual directory to a physical one. all thi works fine in dowload, now I have to implement the upload.

here is my code

private void UploadFile(string uploadFileName, string localFileName)
    {
        //long length = 0;
        string boundary = "----------------------------" + DateTime.Now.Ticks.ToString("x");
        HttpWebRequest httpWebRequest2 = (HttpWebRequest)WebRequest.Create(uploadFileName);
        httpWebRequest2.ContentType = "multipart/form-data; boundary=" + boundary;
        httpWebRequest2.Method = "POST";
        httpWebRequest2.KeepAlive = true;
        httpWebRequest2.Credentials = new NetworkCredential("USER", "PASSWORD", "DOMAIN"); 

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

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

        string formdataTemplate = "\r\n--" + boundary +"\r\nContent-Disposition: form-data; name=\"{0}\";\r\n\r\n{1}";

        memStream.Write(boundarybytes, 0, boundarybytes.Length);

        string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n Content-Type: application/octet-stream\r\n\r\n";

        string header = string.Format(headerTemplate, "uplTheFile", localFileName);

        byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);

        memStream.Write(headerbytes, 0, headerbytes.Length);

        FileStream fileStream = new FileStream(localFileName, FileMode.Open, FileAccess.Read);
        byte[] buffer = new byte[1024];

        int bytesRead = 0;

        while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
        {
            memStream.Write(buffer, 0, bytesRead);
        }

        memStream.Write(boundarybytes, 0, boundarybytes.Length);

        fileStream.Close();

        httpWebRequest2.ContentLength = memStream.Length;

        Stream requestStream = httpWebRequest2.GetRequestStream();
        //error returned in lenght field: "This stream does not support seek operations."

        memStream.Position = 0;
        byte[] tempBuffer = new byte[memStream.Length];
        memStream.Read(tempBuffer, 0, tempBuffer.Length);
        memStream.Close();
        requestStream.Write(tempBuffer, 0, tempBuffer.Length);
        requestStream.Close();

        WebResponse webResponse2 = httpWebRequest2.GetResponse();
        //error returned from getResponse: "The remote server returned an error: (405) Method Not Allowed."
        //I guess cause my folder is in read only

        Stream stream2 = webResponse2.GetResponseStream();
        StreamReader reader2 = new StreamReader(stream2);

        MessageBox.Show(reader2.ReadToEnd());

        webResponse2.Close();
        httpWebRequest2 = null;
        webResponse2 = null; 

    }

firstly I got this error: The remote server returned an error: (405) Method Not Allowed. so I tried to enable POST by adding a mapping onto the web site.

now in the folder on te server I have a web.config file that is:

    <?xml version="1.0" encoding="UTF-8"?>
 <configuration>
    <system.webServer>
    <directoryBrowse enabled="true" />
    <handlers>
        <add name="File TXT" path="*.*" verb="*" modules="IsapiModule" scriptProcessor="C:\Windows\System32\inetsrv\asp.dll" resourceType="Unspecified" requireAccess="Script" preCondition="bitness64" />
    </handlers>
</system.webServer>
</configuration>

in this way I do not get any error, but the application does not upload any file. how do I solve this problem?

Can't you just save the file? Are you using the Asp.NET file upload control? Do you need to send the file across to another endpoint? — awright18, Oct 24 '12 at 09:49
what do you mean by "just save the file"? I need to upload it from client to server folder. no I'm not using Asp.NET, just a web site in the application pool which is called from client by the httpwebrequest (not sure if I completly answer your question) — andrea, Oct 24 '12 at 09:52

score 0 · Answer 1 · answered Oct 24 '12 at 10:01

0

A much simpler solution would be to use the System.Net.Webclient class to upload the file.

System.Net.WebClient client = new System.Net.WebClient();

client.UploadFile("www.myfileuploadendpoint.com",@"c:\myfiletoupload.txt");

The client also has an OnUploadFileCompleted event that will call a handler when its done.

client.OnUploadFileCompleted  += UploadCompleted(sender,args) => { //do whatever you want}

This will save you code and bugs. Good Luck! :)

answered Oct 24 '12 at 10:01

awright18

2,255
2
23
22

Got exactly the same behaviour. 1) POST not allowed, and after adding the web.confing no error but no file uploaded – andrea Oct 24 '12 at 10:12
Thought this may be relevant http://stackoverflow.com/questions/2436182/405-method-not-allowed-error-in-wcf – awright18 Oct 24 '12 at 10:15
"GET" says it is a wron verb and actually is quite expected. I think I need POST to upload files or data in general – andrea Oct 24 '12 at 10:36

score -1 · Answer 2 · answered Dec 11 '13 at 06:19

-1

Both of the above sample not working,

"The remote server returned an error: (405) Method Not Allowed." is the exception caught on trying both the above codes

Expect someone to share their thought on these exceptions, Please.

rgds, thiru

answered Dec 11 '13 at 06:19

Prakash

1

enabling POST in httpwebrequest file upload

2 Answers2