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POVB.NET - multipart form upload not working. What's wrong?
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2010-01-07T20:26:58.133
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I tried searching and found out that someone has written a multipart form uploader. Though it had one thing wrong: It transfered all the - supposedly - POST values in the url.. Which the web application doesn't like - somehow. It went all <code>POST /index.php?page=post&s=add&title=test&tags=testtags HTTP/1.1</code> And only added the file into the post content. I tried submitting with a browser, and this came out: <pre><code>POST /index.php?page=post&s=add HTTP/1.1 Host: gelbooru.com Connection: keep-alive User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/532.0 (KHTML, like Gecko) Chrome/3.0.195.38 Safari/532.0 Referer: http://gelbooru.com/index.php?page=post&s=add Content-Length: 54851 Cache-Control: max-age=0 Origin: http://gelbooru.com Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryFqdVQ+1blrPMX2py Accept: application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5 Accept-Encoding: gzip,deflate,sdch Cookie: __utmz=52483902.1258558959.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none);user_id=7382; pass_hash=lolpasswordcensored; __utma=52483902.1527465380.1258558959.1261431208.1261504455.7; __utmc=52483902; __utmb=52483902.1.10.1261504455 Accept-Language: de-DE,de;q=0.8,en-US;q=0.6,en;q=0.4 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 ------WebKitFormBoundaryFqdVQ+1blrPMX2py Content-Disposition: form-data; name="upload"; filename="001.jpg" Content-Type: image/jpeg IMGDATA ------WebKitFormBoundaryFqdVQ+1blrPMX2py Content-Disposition: form-data; name="source" ------WebKitFormBoundaryFqdVQ+1blrPMX2py Content-Disposition: form-data; name="title" ------WebKitFormBoundaryFqdVQ+1blrPMX2py Content-Disposition: form-data; name="tags" tagtests ------WebKitFormBoundaryFqdVQ+1blrPMX2py Content-Disposition: form-data; name="rating" e ------WebKitFormBoundaryFqdVQ+1blrPMX2py Content-Disposition: form-data; name="submit" Upload ------WebKitFormBoundaryFqdVQ+1blrPMX2py-- </code></pre> I replaced the image data bytes with IMGDATA to make it shorter. This upload was accepted. So I tried to imitate this with VB.NET code I will show soon. This came out: <pre><code>POST /index.php?page=post&s=add& HTTP/1.1 Cookie: user_id=7382; pass_hash=lolpass_hashcensor; Origin: http://gelbooru.com Referer: http://gelbooru.com/index.php?page=post&s=add Content-Type: multipart/form-data; boundary=----------8cc5152e90b3c60 Host: gelbooru.com Content-Length: 243397 Expect: 100-continue Connection: Keep-Alive HTTP/1.1 100 Continue ----------8cc5152e90b3c60 Content-Disposition: form-data; name="tags" tagtest ----------8cc5152e90b3c60 Content-Disposition: form-data; name="source" ----------8cc5152e90b3c60 Content-Disposition: form-data; name="rating" e ----------8cc5152e90b3c60 Content-Disposition: form-data; name="title" ----------8cc5152e90b3c60 Content-Disposition: form-data; name="submit" Upload ----------8cc5152e90b3c60 Content-Disposition: form-data; name="upload"; filename="1017E.jpg" Content-Type: application/octet-stream FILE ----------8cc5152e90b3c60 </code></pre> This got NOT accepted though. So what was the problem? I also tried putting the two extra (--) somewhere else.. And in the end, it didn't change anything. This is the cutout of the VB.NET code I used for transmitting. The Uploader.Start starts the upload process through a thread which uses the global variables. <pre><code>Sub StartUploadJob(ByVal filepath As String, ByVal tags As String, ByVal title As String, ByVal source As String, ByVal rate As rating) ContinueProgressLoop = True processloop = New Threading.Thread(AddressOf ProgressLoopThread) Uploader = New Threading.Thread(AddressOf UploadFileEx) uploadfile = filepath querystring("page") = "post" querystring("s") = "add" 'http://gelbooru.com/index.php?page=dapi&s=post&q=index 'querystring("page") = "dapi" 'querystring("s") = "post" 'querystring("q") = "index" 'url = "http://gelbooru.com/index.php" url = "http://sinni800.ath.cx/UploadTest.aspx" 'url = "http://gelbooru.com/ok.php" fileFormName = "upload" contenttype = "application/octet-stream" uploadstrings("tags") = tags uploadstrings("source") = source uploadstrings("rating") = rate.ToString uploadstrings("title") = title 'querystring("user_id") = My.Settings("user_id") 'querystring("pass_hash") = My.Settings("pass_hash") uploadstrings("submit") = "Upload" working = True cookies = New CookieContainer() 'cookies.Add(My.Settings.cookies) Uploader.Start() processloop.Start() End Sub Dim uploadstrings As New NameValueCollection Dim uploadfile As String : Dim url As String : Dim fileFormName As String : Dim contenttype As String : Dim querystring As New NameValueCollection : Dim cookies As CookieContainer Function UploadFileEx() '(ByVal uploadfile As String, ByVal url As String, ByVal fileFormName As String, ByVal contenttype As String, ByVal querystring As NameValueCollection, ByVal cookies As CookieContainer) As String If (fileFormName Is Nothing) OrElse (fileFormName.Length = 0) Then fileFormName = "file" End If If (contenttype Is Nothing) OrElse (contenttype.Length = 0) Then contenttype = "application/octet-stream" End If Dim postdata As String postdata = "?" If querystring IsNot Nothing Then For Each key As String In querystring.Keys postdata += (key & "=") + querystring.[Get](key) & "&" Next End If Dim uri As New Uri(url + "?page=post&s=add") Dim boundary As String = "----------" & DateTime.Now.Ticks.ToString("x") Dim webrequest__1 As HttpWebRequest = DirectCast(WebRequest.Create(uri), HttpWebRequest) 'webrequest__1.CookieContainer = cookies webrequest__1.Headers(HttpRequestHeader.Cookie) = My.Settings.cookie_string webrequest__1.Headers.Add("Origin", "http://gelbooru.com") webrequest__1.Referer = "http://gelbooru.com/index.php?page=post&s=add" webrequest__1.ContentType = "multipart/form-data; boundary=" & boundary webrequest__1.Method = "POST" ' Build up the post message header Dim sb As New StringBuilder() For Each key As String In uploadstrings.Keys ' content-disposition: form-data; name="field1" 'content-type: text/plain sb.Append(boundary & vbCrLf) sb.Append("Content-Disposition: form-data; name=""" + key + """" & vbCrLf) ' sb.Append("content-type: text/plain" & vbCrLf) sb.Append(vbCrLf) sb.Append(uploadstrings(key)) sb.Append(vbCrLf) Next Dim close As Byte() = Encoding.UTF8.GetBytes("--") sb.Append("--") sb.Append(boundary) sb.Append(vbCr & vbLf) sb.Append("Content-Disposition: form-data; name=""") sb.Append(fileFormName) sb.Append("""; filename=""") sb.Append(Path.GetFileName(uploadfile)) sb.Append("""") sb.Append(vbCr & vbLf) sb.Append("Content-Type: ") sb.Append(contenttype) sb.Append(vbCr & vbLf) sb.Append(vbCr & vbLf) Dim postHeader As String = sb.ToString() Dim postHeaderBytes As Byte() = Encoding.UTF8.GetBytes(postHeader) ' Build the trailing boundary string as a byte array ' ensuring the boundary appears on a line by itself Dim boundaryBytes As Byte() = Encoding.ASCII.GetBytes(vbCr & vbLf & boundary & "--" & vbCr & vbLf) Dim fileStream As New FileStream(uploadfile, FileMode.Open, FileAccess.Read) Dim length As Long = postHeaderBytes.Length + fileStream.Length + boundaryBytes.Length webrequest__1.ContentLength = length Dim requestStream As Stream = webrequest__1.GetRequestStream() Dim fulllength As Integer = postHeaderBytes.Length + fileStream.Length + boundaryBytes.Length RaiseEvent TextMessage("") ' Write out our post header RaiseEvent TextMessage("Write out our post header") requestStream.Write(postHeaderBytes, 0, postHeaderBytes.Length) progress = New Progress_Struct(100 / fulllength * postHeaderBytes.Length, postHeaderBytes.Length, fulllength) ' Write out the file contents RaiseEvent TextMessage("Write out the file contents") Dim buffer As Byte() = New [Byte](CUInt(Math.Min(4096, CInt(fileStream.Length))) - 1) {} Dim bytesRead As Integer = 0 While (InlineAssignHelper(bytesRead, fileStream.Read(buffer, 0, buffer.Length))) <> 0 requestStream.Write(buffer, 0, bytesRead) Progress = New Progress_Struct(100 / fulllength * (Progress.bytes_read + buffer.Length), Progress.bytes_read + buffer.Length, fulllength) End While RaiseEvent TextMessage("bytesRead = " + bytesRead.ToString) RaiseEvent TextMessage("postHeaderBytes.length = " + postHeaderBytes.Length.ToString) RaiseEvent TextMessage("Main File bytes written") ' Write out the trailing boundary requestStream.Write(boundaryBytes, 0, boundaryBytes.Length) Progress = New Progress_Struct(100 / fulllength * (Progress.bytes_read + boundaryBytes.Length), Progress.bytes_read + boundaryBytes.Length, fulllength) Dim responce As WebResponse Try RaiseEvent TextMessage("Trying normal response...") responce = webrequest__1.GetResponse() Catch ex As Net.WebException RaiseEvent TextMessage("ERROR " + ex.Status.ToString + " Trying to get Error response.") responce = ex.Response End Try Dim s As Stream = responce.GetResponseStream() Dim sr As New StreamReader(s) ContinueProgressLoop = False Dim returnstr As String = sr.ReadToEnd() 'SendHtmlMessage(returnstr) RaiseEvent ProgressChange(Progress) RaiseEvent UploadFinished(returnstr) RaiseEvent TextMessage("Working FALSE") working = False Return returnstr End Function </code></pre> I hope anybody can help me with this. I can't figure out what is wrong. It should return a "Upload Success" message with a redirect, but it only returns the upload page itself. I checked with a network sniffer.
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<vb.net><forms><upload><multipart><form-data>
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VB.NET - multipart form upload not working. What's wrong?
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