C# Mono HTTP multipart post to file hosting

ARGINITE

I'm trying to write a tool for uploading files to a file hosting site (ifile.it) but I am f*cked if I can get it to work, it is written in C# using Mono.

The problem with my code is that it seems to abort the upload and the upload server returns "temp file can not be deleted" error. I have contacted the site administrators and they were good enough to go through the log files for the upload server I was trying to upload to, this is how I found out that my code was aborting the upload before it had finished.

Any help would be greatly appreciated or if you happen to know of something like curl for Mono that would be good too (I have had look at the project on sourceforge and it is out of date )

All the code is below:

using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text;

namespace mmp7
{
    class MainClass
    {
        public static void Main(string[] args)
        {        
            string FilePath = "/home/cccp/test.jpg";
            
            IfileUpload iload = new IfileUpload();
            
            Console.WriteLine("result: " + iload.UploadtoIfile(FilePath));
        }
            

    }
    
    class IfileUpload
    {
        public string UploadtoIfile(string FilePath)
        {
            FileSystemInfo _file = new FileInfo(FilePath);
            DateTime dateTime2 = DateTime.Now;
            long l2 = dateTime2.Ticks;
            string s1 = "----------------------" + l2.ToString("x");
            HttpWebRequest httpWebRequest = GetWebrequest(s1);
            
            using (FileStream fileStream = new FileStream(_file.FullName, FileMode.Open, FileAccess.Read, FileShare.Read))
            {
                byte[] bArr1 = Encoding.ASCII.GetBytes("\r\n--" + s1 + "\r\n");
                
                string s2 = GetRequestMessage(s1, _file.Name);
                
                byte[] bArr2 = Encoding.UTF8.GetBytes(s2);
                Stream memStream = new MemoryStream();
                memStream.Write(bArr1, 0, bArr1.Length);
                memStream.Write(bArr2, 0, bArr2.Length);
                byte[] buffer = new byte[1024];
                int bytesRead = 0;
                while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
                {
                    memStream.Write(buffer, 0, bytesRead);

                }
                httpWebRequest.ContentLength = memStream.Length;
                fileStream.Close();

                Stream requestStream = httpWebRequest.GetRequestStream();

                memStream.Position = 0;
                byte[] tempBuffer = new byte[memStream.Length];
                
                //Console.WriteLine("Length: " + tempBuffer.Length);
                
                memStream.Read(tempBuffer, 0, tempBuffer.Length);
                memStream.Close();
                
                
                
                requestStream.Write(tempBuffer, 0, tempBuffer.Length);
                requestStream.Close();

            }
            
            string tm = "";
            using (Stream stream = httpWebRequest.GetResponse().GetResponseStream())
            using (StreamReader streamReader = new StreamReader(stream))
            {
                tm = streamReader.ReadToEnd();

            }
            return tm;
        }
            
        private string GetRequestMessage(string boundary, string FName)
        {

            StringBuilder stringBuilder = new StringBuilder();
            
            stringBuilder.Append(boundary);
            stringBuilder.Append("\r\n");
            
            stringBuilder.Append("Content-Disposition: form-data; name=\"");
            stringBuilder.Append("filecontent");
            stringBuilder.Append("\"; filename=\"");
            stringBuilder.Append(FName);
            stringBuilder.Append("\"");
            stringBuilder.Append("\r\n");
            
            stringBuilder.Append("Content-Type: ");
            stringBuilder.Append("multipart/form-data");
            stringBuilder.Append("\r\n");
            
               //stringBuilder.Append("Content-Transfer-Encoding: ");
               //stringBuilder.Append("binary");
            
            //stringBuilder.Append("\r\n");
            //stringBuilder.Append(boundary);
            
            //stringBuilder.Append("\r\n");
            stringBuilder.Append("\r\n");
            
             Console.WriteLine("START:");
            Console.WriteLine(stringBuilder.ToString());
            Console.WriteLine("END.");
            
            return stringBuilder.ToString();
        }
            
        private CookieContainer _cockies = new CookieContainer();
            
        private HttpWebRequest GetWebrequest(string boundary)
        {                
            Uri uri = new Uri("http://s26.ifile.it/upload?");
            
               HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(uri);
            
            httpWebRequest.CookieContainer = _cockies;
            
            httpWebRequest.ContentType = "multipart/form-data; boundary=" + boundary;
            
            httpWebRequest.UserAgent = "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.14) Gecko/2009090216 Ubuntu/9.04 (jaunty) Firefox/3.0.14";
            
            httpWebRequest.Referer = "http://ifile.it/upload:classic";
            
            httpWebRequest.Method = "POST";
            httpWebRequest.KeepAlive = true;
            httpWebRequest.Timeout = -1;

            httpWebRequest.Headers.Add("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.7");

            httpWebRequest.Headers.Add("Accept-Encoding", "gzip,deflate");
            
            httpWebRequest.Headers.Add("Accept-Language", "en-us,en;q=0.5");

            return httpWebRequest;
        }
    }
    
}

Thanks for any and all help.

Martyr

Here is what the site code uses when uploading:

POST /upload?apikey= HTTP/1.1
Accept: text/*
Content-Type: multipart/form-data; boundary=----------cH2Ef1cH2Ef1Ij5ei4ae0Ij5GI3ae0
User-Agent: Shockwave Flash
Host: s30.ifile.it
Content-Length: 27538
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: ifileit_sess=ac2046157c6a60d6a84042a841cbe1ac31903539; __utma=256377427.27208703.1254731852.1254731852.1254731852.1; __utmb=256377427.1.10.1254731852; __utmc=256377427; __utmz=256377427.1254731852.1.1.utmcsr=s26.ifile.it|utmccn=(referral)|utmcmd=referral|utmcct=/

------------cH2Ef1cH2Ef1Ij5ei4ae0Ij5GI3ae0
Content-Disposition: form-data; name="Filename"

kermit.jpg
------------cH2Ef1cH2Ef1Ij5ei4ae0Ij5GI3ae0
Content-Disposition: form-data; name="Filedata"; filename="kermit.jpg"
Content-Type: application/octet-stream

<JPEG binary data removed>

------------cH2Ef1cH2Ef1Ij5ei4ae0Ij5GI3ae0
Content-Disposition: form-data; name="Upload"

Submit Query
------------cH2Ef1cH2Ef1Ij5ei4ae0Ij5GI3ae0--HTTP/1.1 200 OK
Server: Microsoft IIS/7.0
Date: Mon, 05 Oct 2009 08:38:14 GMT
Content-Type: application/json; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Expires: Mon, 26 Jul 1997 05:00:00 GMT
Last-Modified: Mon, 05 Oct 2009 08:38:14 GMT
Cache-Control: post-check=0, pre-check=0
Pragma: no-cache

f2
{"status":"ok","url":"http:\/\/ifile.it\/lr5bp37\/kermit.jpg","file_key":"lr5bp37","file_size":"27120","file_md5":"a8705eaee3a925a61cd0cb9997d206f6","file_mime":"image\/jpeg","file_name":"kermit.jpg","hash":"cf1461634b6e36d9fdbeec483dd1ea10"}
0

and here is what your code sends for same file

POST /upload? HTTP/1.1
Content-Type: multipart/form-data; boundary=----------------------8cc13b70ea19c14
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.14) Gecko/2009090216 Ubuntu/9.04 (jaunty) Firefox/3.0.14
Referer: http://ifile.it/upload:classic
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Accept-Encoding: gzip,deflate
Accept-Language: en-us,en;q=0.5
Host: s26.ifile.it
Content-Length: 27314
Expect: 100-continue
Connection: Keep-Alive


------------------------8cc13b70ea19c14
----------------------8cc13b70ea19c14
Content-Disposition: form-data; name="filecontent"; filename="kermit.jpg"
Content-Type: multipart/form-data

<jpeg binary removed>

HTTP/1.1 200 OK
Server: Microsoft IIS/7.0
Date: Mon, 05 Oct 2009 08:40:55 GMT
Content-Type: application/json; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Expires: Mon, 26 Jul 1997 05:00:00 GMT
Last-Modified: Mon, 05 Oct 2009 08:40:54 GMT
Cache-Control: post-check=0, pre-check=0
Pragma: no-cache

3d
{"status":"error","message":"unable to delete tempfile [e5]"}
0

perhaps it's do with your headers/cookies?

Martyr

If you check RFC 1867 Form Based File Upload in HTML

It gives example:

Content-type: multipart/form-data, boundary=AaB03x

--AaB03x
content-disposition: form-data; name="field1"

Joe Blow
--AaB03x
content-disposition: form-data; name="pics"
Content-type: multipart/mixed, boundary=BbC04y

In your code, you're using hyphens at the beginning which is acceptable, but could confuse anyone reading code or cause parse problem on server.

rfc recommends you start with underscore..but anyway, that's where the problem is.

if you add the following to end of stream after writing file data

[php]string cd_end = "\r\n" + "--" + boundary + "\r\nContent-Disposition: form-data; name=\"Upload\"\r\n\r\nSubmit Query\r\n--" + boundary + "--";[/php]

also in the GetRequestMessage method:

[PHP] private string GetRequestMessage(string boundary, string FName)
{
StringBuilder stringBuilder = new StringBuilder();

stringBuilder.Append("--" + boundary + "\r\n");
stringBuilder.Append("Content-Disposition: form-data; name=\"Filename\"\r\n\r\n");
stringBuilder.Append(FName + "\r\n--" + boundary + "\r\n");
stringBuilder.Append("Content-Disposition: form-data; name=\"Filedata\"; filename=\"" + FName + "\"\r\n");
stringBuilder.Append("Content-Type: application/octet-stream\r\n\r\n");

System.Net.ServicePointManager.Expect100Continue = false;
return stringBuilder.ToString();
}[/PHP]

this should then work fine..

POST /upload?apikey= HTTP/1.1
Content-Type: multipart/form-data; boundary=633903579164531250
User-Agent: IFile Uploader
Cache-Control: no-cache
Host: s30.ifile.it
Content-Length: 27462
Connection: Keep-Alive

--633903579164531250
Content-Disposition: form-data; name="Filename"

kermit.jpg
--633903579164531250
Content-Disposition: form-data; name="Filedata"; filename="kermit.jpg"
Content-Type: application/octet-stream

<jpeg data>

--633903579164531250
Content-Disposition: form-data; name="Upload"

Submit Query
--633903579164531250--

and the response from server..

HTTP/1.1 200 OK
Server: Microsoft IIS/7.0
Date: Mon, 05 Oct 2009 15:45:21 GMT
Content-Type: application/json; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Expires: Mon, 26 Jul 1997 05:00:00 GMT
Last-Modified: Mon, 05 Oct 2009 15:45:21 GMT
Cache-Control: post-check=0, pre-check=0
Pragma: no-cache

100
{"status":"ok","url":"http:\/\/ifile.it\/2ln5amr\/kermit.jpg","file_key":"2ln5amr","file_size":"27120","file_md5":"a8705eaee3a925a61cd0cb9997d206f6","file_mime":"image\/jpeg","file_name":"kermit.jpg","hash":"1582e68cd75a454fc0d7ce86d64de607"}
0

ARGINITE

Thanks man, I have been banging my head against a wall with this code for a while now. It's amazing how much you forget when your teaching kids ever day rather than coding

Will give it a go this evening.

Works, thank you!

Evil Phil

ARGINITE wrote: »

Works, thank you!

Then flag the thread as [Solved] please, thank you.

ARGINITE

I would, but I couldn't find where to change it and then I went for dinner

Where is the option to change it?

Evil Phil

Edit your original post, you'll need to use the 'Go Advanced' button and then select it from the dropdown.

ARGINITE

I can't find the drop down menu
Honest!

Evil Phil

Kinda weird, anyway I've done it for you now.