Parameters xmldata, $filestream and $filedata are all missing error

H

honguin

Hi,

With the following code, I have created a web request to a url which I
am making a HTML POST with the html page request.htm, even though it
makes a HTML POST, the StreamReader produces a XML response error
shown after the code, with the description "Parameters xmldata,
$filestream and $filedata are all missing. One of these must not be
null."

Any suggestions in how to resolve this error?

Many thanks,

Hon

WebRequest request = WebRequest.Create("********************");
NetworkCredential networkCredential;
string username = "*****", password = "*********";

private string sendRequestToCOLT()
{
try
{
// create reader and open file.
StreamReader re = File.OpenText(@"request.htm");

// read a lines of text
string text = "", input = null;
while ((input = re.ReadLine()) != null)
{
input = input + "\n";
text = text + input;
}
byte[] byteArray = Encoding.UTF8.GetBytes(text);
networkCredential = new NetworkCredential(username,
password);
request.Credentials = networkCredential;
request.Method = "POST";
request.ContentLength = byteArray.Length;
request.ContentType = "application/x-www-form-
urlencoded";
Stream dataStream = request.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();
WebResponse response = request.GetResponse();
StreamReader reader = new
StreamReader(response.GetResponseStream());
string result = reader.ReadToEnd();
response.Close();
return result;;
}
catch (Exception e)
{
messageTextBox.Text = "EXCEPTION ERROR: " +
e.Message.ToString();
return null;
}
}

---------------------------------------------------------------------------------------------------------------------------------------------------------

<xml version="1.0"?>

<Acknowledgement>

<versionOfXmlSchema>1.0</versionOfXmlSchema>

<receiverSystem>B2BGateway</receiverSystem>

<receiverId>B2BGateway</receiverId>

<receiveTime>20070710-16:08:32</receiveTime>

<senderId>Unknown</senderId>

<senderTime>20070710-16:08:32</senderTime>

<dateMessage></dateMessage>

<message>

<messageType>B2BGateway</messageType>

<messageCode>-1</messageCode>

<messageDescription>com.wm.app.b2b.server.ServiceException: [ISS.
0086.9091] Parameters xmldata, $filestream and $filedata are all
missing. One of these must not be null.

at pub.xml.xmlStringToXMLNode(xml.java:523)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
85)

at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
58)

at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
60)

at java.lang.reflect.Method.invoke(Method.java:391)

at com.wm.app.b2b.server.JavaService.baseInvoke(JavaService.java:
322)

at
com.wm.app.b2b.server.invoke.InvokeManager.process(InvokeManager.java:
612)

at
com.wm.app.b2b.server.invoke.StatisticsProcessor.process(StatisticsProcessor.java:
44)

at
com.wm.app.b2b.server.invoke.ServiceCompletionImpl.process(ServiceCompletionImpl.java:
235)

at
com.wm.app.b2b.server.invoke.ValidateProcessor.process(ValidateProcessor.java:
49)

at com.wm.app.b2b.server.ACLManager.process(ACLManager.java:198)

at
com.wm.app.b2b.server.invoke.DispatchProcessor.process(DispatchProcessor.java:
39)

at
com.wm.app.b2b.server.AuditLogManager.process(AuditLogManager.java:
411)

at
com.wm.app.b2b.server.invoke.InvokeManager.invoke(InvokeManager.java:
521)

at
com.wm.app.b2b.server.invoke.InvokeManager.invoke(InvokeManager.java:
369)

at
com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:246)

at com.wm.app.b2b.server.BaseService.invoke(BaseService.java:
168)

at com.wm.lang.flow.FlowInvoke.invoke(FlowInvoke.java:324)

at com.wm.lang.flow.FlowState.invokeNode(FlowState.java:581)

at com.wm.lang.flow.FlowState.step(FlowState.java:438)

at com.wm.lang.flow.FlowState.invoke(FlowState.java:403)

at com.wm.app.b2b.server.FlowSvcImpl.baseInvoke(FlowSvcImpl.java:
982)

at
com.wm.app.b2b.server.invoke.InvokeManager.process(InvokeManager.java:
612)

at
com.wm.app.b2b.server.invoke.StatisticsProcessor.process(StatisticsProcessor.java:
44)

at
com.wm.app.b2b.server.invoke.ServiceCompletionImpl.process(ServiceCompletionImpl.java:
235)

at
com.wm.app.b2b.server.invoke.ValidateProcessor.process(ValidateProcessor.java:
49)

at com.wm.app.b2b.server.ACLManager.process(ACLManager.java:198)

at
com.wm.app.b2b.server.invoke.DispatchProcessor.process(DispatchProcessor.java:
39)

at
com.wm.app.b2b.server.AuditLogManager.process(AuditLogManager.java:
411)

at
com.wm.app.b2b.server.invoke.InvokeManager.invoke(InvokeManager.java:
521)

at
com.wm.app.b2b.server.invoke.InvokeManager.invoke(InvokeManager.java:
369)

at
com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:246)

at
com.wm.app.b2b.server.comm.DefaultServerRequestHandler.handleMessage(DefaultServerRequestHandler.java:
129)

at
com.wm.app.b2b.server.comm.DefaultSocketRequestHandler.handleMessage(DefaultSocketRequestHandler.java:
181)

at com.wm.util.comm.Connection.handleMessage(Connection.java:
136)

at com.wm.util.comm.Connection$PollRunner.run(Connection.java:
465)

at com.wm.util.pool.PooledThread.run(PooledThread.java:105)

at java.lang.Thread.run(Thread.java:832)

</messageDescription>

</message>

</Acknowledgement>
 
M

Marc Gravell

OK; you read a local file "request.htm" into a string, making sure
line-breaks are \n [note - StringBuilder would have been more
efficient here...]

You then get the UTF8 binary for this string, and upload this as the
POST, with content-type " "application/x-www-form-urlencoded"

So: does "request.htm" actually contain form-encoded data? Based on
the name, I'm guessing not... HTML is not the same thing. HTML is a
markup language used to display data in a browser - very different to
a HTTP POST, which is used to form a request (note that "HTML POST"
doesn't really make sense except in the context "upload an HTML file
by POSTing over HTTP"). You can use sniffers (such as Fiddler) to see
what this POST should look like - or simply google. But it essentially
boils down to name/value pairs, not HTML.

Additionally, note that WebClient is often much easier to use for
uploads that WebRequest.

Marc
 
H

honguin

Hi,

"request.htm" is not a form-encoded data, what happens is that this
page contains xml data in a text field, that when you hit the submit
button, it contains a HTTP POST to a url, which in turn you receive an
XML response. But it is not the XML response that I would like.

I placed even a string like "<HTML></HTML>" replacing the variable
text in byte[] byteArray = Encoding.UTF8.GetBytes(text);, and it still
receives the same error. Essentially the url is using a web service
which only receives HTTP POSTs.
I will have a look at the sniffer fiddler to see what it is doing

Hon.
 
H

honguin

Hi,

Fiddler didn't display any useful information in the case of the
connection to the url from my code only in that a connection was
established.

Hon.
 
M

Marc Gravell

I don't think you fully understand the difference between HTML and
HTTP. I described what your code does ("works as coded"). If
"request.htm" is not form-encoded data, then don't send it as
form-encoded data! An HTTP query does not generally expect to recieve
HTML, and is not going to click any submit button. Rather, *when the
HTML is loaded in a browser*, clicking the submit button causes a
separate HTTP POST (var=value etc from the submitted form) which
returns something (xml apparently).

The only time you would generally upload raw HTML is in a
content-management system (or perhaps a forum / e-mail app with HTML
editors).

Marc
 
M

Marc Gravell

I'd be more interested in what fiddler outputs when you use the
web-page directly, i.e. through a browser clicking on the button. This
will then tell you immediately what you are meant to be uploading. If
the post is over SSL you will need fiddler 2 (or alternatively the
debug version of some MS dlls).

Marc
 
H

honguin

Hi again,

How would you make a seperate HTTP Post to the url with only the XML
data?
From what you had said, you can only submit the data using the submit
Click to expand...
button via a form, can you perform something like as an "automation"
in .NET?

Cheers,

Hon
 
H

honguin

It seems to be a post over SSL.

The data sent represents a SSLv3-compatible ClientHello handshake.
For your convenience, the data is extracted below.

Major Version: 3
Minor Version: 1
Random: 46 94 B6 83 DC B6 B3 7E 26 7C 82 04 32 69 35 4E D0 E4 BF 03 5F
AC DD 03 1C C4 64 EF 15 77 69 8E
SessionID: B2 69 E2 99 24 84 EA E8 5C D4 4B B9 CA 81 98 14 3E 8B 84 D0
FC 9D 87 16 BA FA F3 24 A8 C0 42 7D
Ciphers:
[0004] SSL_RSA_WITH_RC4_128_MD5
[0005] SSL_RSA_WITH_RC4_128_SHA
[000A] SSL_RSA_WITH_3DES_EDE_SHA
[0009] SSL_RSA_WITH_DES_SHA
[0064] TLS_RSA_EXPORT1024_WITH_RC4_56_SHA
[0062] TLS_RSA_EXPORT1024_WITH_DES_SHA
[0003] SSL_RSA_EXPORT_WITH_RC4_40_MD5
[0006] SSL_RSA_EXPORT_WITH_RC2_40_MD5
[0013] SSL_DHE_DSS_WITH_3DES_EDE_SHA
[0012] SSL_DHE_DSS_WITH_DES_SHA
[0063] TLS_DHE_DSS_EXPORT1024_WITH_DES_SHA
 
M

Marc Gravell

SSL chains are deliberately impenetrable. Fiddler will manage, but
only from IE - hence looking at what you get when using the browser is
probably a better starting point.

Regards creating an HTTP post of xml... how about:

string request = @"<xml/>", response;
using (WebClient client = new WebClient()) {
response = client.UploadString(url, "POST", request);
}

Marc
 
H

honguin

Ok, I give you the lowdown on this: -

I made used the web page on the web browser and hit the submit with
Fiddler 2 running, and it gave: -

In the request header,
Content-Type: application/x-www-form-urlencoded
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
application/x-shockwave-flash, application/vnd.ms-excel, application/
vnd.ms-powerpoint, application/msword, */*
Accept-Language: en-gb

Hon.
 
H

honguin

Looking at the html page in the source code,
it starts with : -
<html xmlns:v="urn:schemas-microsoft-com:vml"
xmlns:blush:="urn:schemas-microsoft-com:blush:ffice:blush:ffice"
xmlns:w="urn:schemas-microsoft-com:blush:ffice:word"
xmlns:x="urn:schemas-microsoft-com:blush:ffice:excel"
xmlns="http://www.w3.org/TR/REC-html40">

<head>
<meta http-equiv=Content-Type content="text/html;
charset=windows-1252">
<meta name=ProgId content=Word.Document>
<meta name=Generator content="Microsoft Word 10">
<meta name=Originator content="Microsoft Word 10">
<link rel=File-List
href="CLI%20-%20Reseller%20Operations%20Support%20System_files/
filelist.xml">
<link rel=Edit-Time-Data
href="CLI%20-%20Reseller%20Operations%20Support%20System_files/
editdata.mso">
<!--[if !mso]>
<style>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
..shape {behavior:url(#default#VML);}
</style>
<![endif]-->

Regards,

Hon
 
M

Marc Gravell

Gotta love Word.
However, the extract doesn't include any of the FORM stuff, so I'm not
sure anybody can diagnose anything from this.

Marc
 
M

Marc Gravell

No actual body? Depending on which version of Fiddler you are using
you may need to switch tabs, double-click, etc to see the body.

Marc
 
H

honguin

When I was testing the urls, I stumbled upon this: -

Typing in the url https://www.wmdmzis12.colt.net/invoke/RossB2BGateway.online.http/submitCLICPSOrder
threw the error as seen before.

But then I tried the url
https://www.wmdmzis12.colt.net/invoke/RossB2BGateway.online.http/submitCLICPSOrder?xmldata=""
and it displayed something which is closer to the solution.

<?xml version="1.0" ?>
- <Acknowledgement>
<versionOfXmlSchema>1.0</versionOfXmlSchema>
<receiverSystem>B2BGateway</receiverSystem>
<receiverId>B2BGateway</receiverId>
<receiveTime>20070711-13:50:38</receiveTime>
<senderId>Unknown</senderId>
<senderTime>20070711-13:50:38</senderTime>
<dateMessage />
- <message>
<messageType>B2BGateway</messageType>
<messageCode>-1</messageCode>
<messageDescription>/ is invalid. The value doesnt match the
pattern.</messageDescription>
</message>
</Acknowledgement>

By the looks of it, if i submit the whole xml data as a string within
the "", in theory, the response xml packet should be a valid request
to the web service.

Now I tried placing the "xmldata=" +
someMethodDisplayingTheXMLRequestString() subsitiuting text in the
statement
byte[] byteArray = Encoding.UTF8.GetBytes(text);

But that doesn't seem to be working, but is there a way that you can
make a HTTP request with the xmldata parameter string and the xml data
shoved at the end of the ? query.

Cheers,

Hon
 
M

Marc Gravell

Yes and no - you would probably need to url-encode the entire string,
but more importantly watch out: url strings can be limited in length.
You could run into problems where you lose the end of your fragment.

But the short answer is that (as with any such service) you really
need to know what the API is... is there no documentation? ideally
with an example?

Marc
 
H

honguin

Hi,

I sorted out the problem now adding the whole xml string at the end of
the url which worked fine (no url strings limitation in length). I
adopted a HTTPWebRequest and StreamReader.

Cheers,

Hon
 
H

honguin

Yep, there is API documentation on this which shows some examples but
there isn't much on what the typical XML requests are.
 
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