WebRequest -="The request was aborted: The request was canceled."

[pelegk2]

when i send an xml to a server using WebRequest object (i am sending a paramater+xml in size of about 250 chars)

i recve an error :

System.Net.WebException was unhandled
Message="The request was aborted: The request was canceled."

and the inner exception is :{"Cannot close stream until all bytes are written."}

this happens row 63 ==>>SW.Close()


as i understand this , the request to the server didnt finish the sending and its being closed!

how can i prevent this?

1    Public Shared Function Send(ByVal URL As String, _
2    
3    Optional ByVal PostData As String = "", _
4    
5    Optional ByVal Method As HTTPMethod = HTTPMethod.HTTP_GET, _
6    
7    Optional ByVal ContentType As String = "")
8    
9    Dim Request As HttpWebRequest = WebRequest.Create(URL)
10   
11   Dim Response As HttpWebResponse
12   
13   Dim SW As StreamWriter
14   
15   Dim SR As StreamReader
16   
17   Dim ResponseData As String
18   
19   ' Prepare Request Object
20   
21   Request.Method = Method.ToString().Substring(5)
22   
23   ' Set form/post content-type if necessary
24   
25   If (Method = HTTPMethod.HTTP_POST AndAlso PostData <> "" AndAlso ContentType = "") Then
26   
27   ContentType = "application/x-www-form-urlencoded"
28   
29   End If
30   
31   ' Set Content-Type
32   
33   If (ContentType <> "") Then
34   
35   Request.ContentType = ContentType
36   
37   Request.ContentLength = PostData.Length
38   
39   End If
40   
41   'Dim bytes As Byte() = System.Text.Encoding.UTF8.GetBytes(PostData)
42   
43   ' Send Request, If Request
44   
45   If (Method = HTTPMethod.HTTP_POST) Then
46   
47   Try
48   
49   SW = New StreamWriter(Request.GetRequestStream())
50   
51   SW.Write("XML=" & RepalceData(PostData))
52   
53   Catch Ex As Exception
54   
55   Throw Ex
56   
57   MsgBox(Ex.Message)
58   
59   '
60   
61   Finally
62   
63   SW.Close()
64   
65   End Try
66   
67   End If
68   
69   ' Receive Response
70   
71   Try
72   
73   Response = Request.GetResponse()
74   
75   SR = New StreamReader(Response.GetResponseStream())
76   
77   ResponseData = SR.ReadToEnd()
78   
79   MsgBox(ResponseData)
80   
81   Catch Wex As System.Net.WebException
82   
83   SR = New StreamReader(Wex.Response.GetResponseStream())
84   
85   ResponseData = SR.ReadToEnd()
86   
87   Throw New Exception(ResponseData)
88   
89   Finally
90   
91   SR.Close()
92   
93   End Try
94   
95   Return ResponseData
96   
97   End Function
98   
99   
100  Public Shared Function RepalceData(ByRef data)
101  
102  data = Replace(data, "%", "%25")
103  
104  data = Replace(data, " ", "%20")
105  
106  data = Replace(data, "#", "%23")
107  
108  data = Replace(data, "&", "%26")
109  
110  data = Replace(data, "?", "%3F")
111  
112  data = Replace(data, "+", "%2B")
113  
114  RepalceData = data
115  
116  End Function
117

thnaks i nadvance

peleg

[rjkendall]

Have you tried 'SW.Flush()' before the 'SW.Close()' call?

[miloTheGreat]

The cancellation is originating from your SOAP client. Usually from the length of the encoded packet not equally that actual encoded length of the packet. The error is a bit of a red-herring.

You need to set the lenth of of the pack request, to the encoded length. You'll find you only get the error when you try to send extended characters (> ascii 128)

I blogged about it here.

http://01792.org/blog/post/2010/03/1...ebRequest.aspx

[pelegk2]

thnaks both of you
the 'SW.Flush()' was the reason,
and i added the comment of miloTheGreat .