I'm looking for code on how to implement file upload to a HTTPS server  https://sftp.########.com/

I've been successful using the opennetcf ftp lib for normal ftp to this site, but i need to do it with https.

Right now I have:

//for testing i accept all certificates...  

System.Net.ServicePointManager.CertificatePolicy = new AcceptAllCertificatePolicy();

                HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(uri);
                httpWebRequest.Credentials = credentials;       
                HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();

 Beyond this, i'm unsure what to do..

 
for FTP i would do:

Stream httpRequestStream = httpWebRequest.GetRequestStream(); ///But this throws an error..

responseReader = new StreamReader(httpRequestStream);
 

As I'm learning more.. it looks like i'd either like to do a POST or a PUT method to my web server.. which will have a php script to handle the post or put..

 I have managed a normal post, but some id tags like    http://site.com?userid=####&pass=#####  for example..  but what i'm looking for it how to send whole files.

THanks,

Scott
 

Try something like this:

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
request.Credentials = credentials;       
request.ContentType = "multipart/form-data";
request.Method = "POST";
request.KeepAlive = true;

using(StreamWriter writer = new StreamWriter(request.GetRequestStream()))
{
    using(FileStream fs = new FileStream(name_of_my_file, FileMode.Open, FileAccess.Read, FileShare.Read))
    {
        request.ContentLength = fs.Length;

        byte[] buffer = new byte[1024];

        int read = 0;
        while ( (read = fs.Read(buffer, 0, buffer.Length)) != 0 )
        {
            writer.Write(buffer, 0, read);
        }
    }
}

HttpWebResponse response = (HttpWebResponse)request.GetResponse();
.
.
.

There are plenty of examples of this on the web if you search Google.

Thanks. I found some stuff similar and have written the code.

I can send without problem... and catch it on my Apache Server.

Question: Is there a way to declare the name of this file, so that I can get it on the Apache Server?

 
For instance, if this were HTML then we would do <... type=file, name=filename ...> in the code, is that possible with httpwebrequest?

It's a shame that WebClient isn't an avalible class on .Net Compact Framework

Thanks,
Scott

You need to specify the Content-Disposition header if you also want to send the file name to the server. See below:

string boundary = String.Format("----------{0}", DateTime.Now.Ticks.ToString("x"));
string fieldName = "fileToUpload";
string fileName = "name_of_my_file";
string fileContentType = "application/octet-stream";

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
request.Credentials = credentials;       
request.ContentType = String.Format("multipart/form-data; boundary={0}", boundary);
request.Method = "POST";
request.KeepAlive = true;

using(StreamWriter writer = new StreamWriter(request.GetRequestStream()))
{
	byte[] postHeader = Encoding.ASCII.GetBytes(String.Format("Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\" Content-Type: {2}\r\n\r\n",fieldName, fileName, fileContentType));

    byte[] boundaryBytes = Encoding.ASCII.GetBytes(String.Format("\r\n{0}\r\n", boundary));

    using(FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read))
    {
        request.ContentLength = postHeader.Length + fs.Length + boundaryBytes.Length;

        byte[] buffer = new byte[1024];

        int read = 0;
        while ( (read = fs.Read(buffer, 0, buffer.Length)) != 0 )
        {
            writer.Write(buffer, 0, read);
        }
    }

	writer.Write(boundaryBytes, 0, boundaryBytes.Length);
}

HttpWebResponse response = (HttpWebResponse)request.GetResponse();
.
.
.

 So when i do this, I'm not seeing anything on the php side via a phpinfo call.

 It sees the Content Type with the added boundry, but doesn't even create a temp file...

 I'm not sure it likes the

; boundary={0}", boundary);  added to the ContentType.

I used code similar to yours, and added in sending the postHeader before sending the file

writer.Write(postHeader, 0, postHeader.Length); 

php normally grabs any files and store it as a temp.. but it doesn't seem to even recognize a file was sent.

I have everything worked out now. Thanks. 

Neil, I was hoping I could ask you one last question on this topic. I was hoping to send some POST data along with my Files.. Seems like my Content Type choice is allowing me one or the other, but not both. Here is a snippit of the code, any help is greatly appreciated.  (multipart/form-data I get the Files correctly but no variables vs. application/x-www-form-urlencoded I get the POST variables correctly but no files)

                            string reqBuffer = "variable1=" someVar1 + "&variable2=" + someVar2;
                            byte[] reqBufferBytes = Encoding.ASCII.GetBytes(reqBuffer);
                            length += reqBufferBytes.Length; //most of the length is calculated earlier, this is the final thing added to it

                            myHttpWebRequest = (HttpWebRequest)WebRequest.Create(myReceiverUrl);
                            myHttpWebRequest.ContentType = "multipart/form-data; boundary=" + boundary;
                            myHttpWebRequest.Method = "POST";
                            myHttpWebRequest.KeepAlive = true;

                            myHttpWebRequest.ContentLength = length;

                                //Open the stream to the server
                                requestStream = myHttpWebRequest.GetRequestStream();

                                //Open with the POST ITEMS before files are sent
                                requestStream.Write(reqBufferBytes, 0, reqBufferBytes.Length);

                                for (int i = 0; i < fileCount; i++) //For all the files
                                {
                                    requestStream.Write(boundarybytesopen, 0, boundarybytesopen.Length);

                                    byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header[i]);
                                    requestStream.Write(headerbytes, 0, headerbytes.Length);

                                    fileStream = new FileStream(files[i], FileMode.Open, FileAccess.Read);
                                    byte[] buffer = new byte[4096];

                                    int bytesRead = 0;
                                    // Loop through whole file uploading parts in a stream.
                                    while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
                                    {
                                        requestStream.Write(buffer, 0, bytesRead);
                                        requestStream.Flush();
                                    }

                                    fileStream.Close();

                                    //Finish the filestructure
                                    requestStream.Write(boundarybytesclose, 0, boundarybytesclose.Length);
                                }

                                requestStream.Close();

                myHttpWebRequest.Abort();

You need to enclose your "POST ITEMS" with a boundary.

//  Open with the POST ITEMS before files are sent
requestStream.Write(boundarybytesopen, 0, boundarybytesopen.Length);
requestStream.Write(reqBufferBytes, 0, reqBufferBytes.Length);
requestStream.Write(boundarybytesclose, 0, boundarybytesclose.Length);

Great, I got it working...  sorta...

I get a response:

{"This request requires buffering of data for authentication or redirection to be successful."}

It's an apache server, so there's no IIS authentication..

                            myHttpWebRequest = (HttpWebRequest)HttpWebRequest.Create(myReceiverUrl);
                            myHttpWebRequest.ContentType = "multipart/form-data; boundary=" + boundary;
                            myHttpWebRequest.Method = "POST";
                            myHttpWebRequest.KeepAlive = true;
                            myHttpWebRequest.Credentials = credentials;
                            //myHttpWebRequest.PreAuthenticate = true;
                            myHttpWebRequest.AllowWriteStreamBuffering = false;
                            myHttpWebRequest.Timeout = 10000;
                            myHttpWebRequest.ContentLength = length;

                           //Open the stream to the server
                          requestStream = myHttpWebRequest.GetRequestStream();

        -----All the data is sent----

                          //All uploading is complete, close the stream
                          requestStream.Close();

                          HttpWebResponse httpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
                          XmlDocument xmlDoc = new XmlDocument();
                          xmlDoc.Load(httpWebResponse.GetResponseStream());
                          httpWebResponse.Close();
                          httpWebResponse = null;

On HttpWebResponse httpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse(); I get that error:

{"This request requires buffering of data for authentication or redirection to be successful."}

 Scratch that.. i figured it out! :o)   It was a problem with my Content Header... not related to sending.

 Well.. basically.. you can't call a redirect on your server side, because it tries to send it back to your handheld.. and thats bad..
 

does anybody have an entire project to post?  i'm trying to use the sample project from OpenNETCF.Net.Ftp.zip - it seems to establish the connection, but errors out when i try to "upload file".

uploading to an ftp server is the main thing i'm trying to accomplish. 

the reason i say it establishes connection is because i've setup a local ftp server, and i can see the login go through on the ftp server's status window, but it (again) errors out when i try to send a file.  and i never see "Connected" show up in the list for the program on the device.

btw - this is the same case when trying to connect to a remote ftp server - never see "Connected".

anyone got any advice?

so i tweaked some of the methods and i now reference the .dll from a VB project.  i got it working, but whether or not i execute from the c# project or my vb project, the connection sometimes requires 3-4 tries to successfully upload.  does anyone else have similar issues?