VB.NET - Multipart -Formular Upload funktioniert nicht. Was ist los?
Frage
Ich habe versucht zu suchen und herauszufinden, dass jemand einen mehrteiligen Formular -Uploader geschrieben hat.
Obwohl es eines falsch hatte: Es hat alle - angeblich - Postwerte in der URL übertragen, die die Webanwendung nicht mag - irgendwie.
Es ging alles
POST /index.php?page=post&s=add&title=test&tags=testtags HTTP/1.1
Und fügte die Datei nur in den Post -Inhalt hinzu.
Ich habe versucht, mich mit einem Browser einzureichen, und das kam heraus:
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--
Ich habe die Bilddaten -Bytes durch IMGData ersetzt, um sie kürzer zu machen.
Dieser Upload wurde akzeptiert. Also habe ich versucht, dies mit VB.NET -Code nachzuahmen, den ich bald zeigen werde. Das kam heraus:
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
Dies wurde jedoch nicht akzeptiert. Was war das Problem? Ich habe auch versucht, die beiden zusätzlichen (-) woanders zu platzieren. Und am Ende hat es nichts geändert. Dies ist der Ausschnitt des VB.NET -Code, den ich zum Senden verwendet habe. Der Uploader.start startet den Upload -Prozess über einen Thread, der die globalen Variablen verwendet.
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
Ich hoffe, jeder kann mir dabei helfen. Ich kann nicht herausfinden, was los ist.
Es sollte eine "Erfolgs -Erfolgsnachricht hochladen" mit einer Weiterleitung zurückgeben, aber nur die Upload -Seite selbst zurückgibt. Ich habe mit einem Netzwerk -Sniffer überprüft.
Lösung
Warum schaust du dich nicht an? System.Net.WebClient
Klasse stattdessen? http://msdn.microsoft.com/en-us/library/system.net.webclient.aspx Auf diese Weise müssen Sie sich keine Sorgen um die Formatierung der Postdaten machen, rufen Sie einfach an WebClient.UploadFile()
: http://msdn.microsoft.com/en-us/library/36s52zhs.aspx