Receiving xml problem

[Guest]

I am working on a project in which a number of client applications will be
posting xml documents as a byte array to an ASP.NET page on our web server. I
am trying to simulate the process and run into problems.

Sending code:

ASCIIEncoding encoding = new ASCIIEncoding();

string lcUrl = "http://localhost/test/receive.aspx";
HttpWebRequest loHttp =
(HttpWebRequest) WebRequest.Create(lcUrl);

string lcPostData =
"XMLData=" + HttpUtility.UrlEncode("<Data>Test Data</Data>");

loHttp.Method="POST";
loHttp.ContentType = "application/x-www-form-urlencoded";
byte [] lbPostBuffer = encoding.GetBytes(lcPostData);
loHttp.ContentLength = lbPostBuffer.Length;

Stream loPostData = loHttp.GetRequestStream();
loPostData.Write(lbPostBuffer,0,lbPostBuffer.Length);
loPostData.Close();

HttpWebResponse loWebResponse = (HttpWebResponse)
loHttp.GetResponse();

Encoding enc = System.Text.Encoding.GetEncoding(1252);

StreamReader loResponseStream =
new StreamReader(loWebResponse.GetResponseStream());

string lcHtml = loResponseStream.ReadToEnd();

Response.Write (lcHtml);

loWebResponse.Close();
loResponseStream.Close();

Receiving code:
Stream str = Request.InputStream;
int strLen = (int)str.Length;
byte[] bArr = new byte[strLen];
Int32 bytes = str.Read(bArr,0,strLen);
string strmContents = System.Text.Encoding.ASCII.GetString(bArr,
0, bytes);
Response.Write (strmContents);


The above code will work with XMLData=xyz. But when “<†or “>†is in the
string as above, an error is returned from the receiving page:
The remote server returned an error: (500) Internal Server Error

If the following line is commented out, it works:
loHttp.ContentType = "application/x-www-form-urlencoded";

When it works with the above line commented out, the result displayed is:
XMLData=%3cData%3eTest+Data%3c%2fData%3e

If I use:
string strXMLData = System.Text.Encoding.ASCII.GetString(bArr);
strXMLData = HttpUtility.UrlDecode(strXMLData);
Response.Write (strXMLData);

The result I get is: XMLData=Test Data
I need the end result to be <Data>Test Data</Data>"

Where am I going wrong?

Thanks for any help

 

[John Timney \( MVP \)]

I dont have an answer for you, but theres an example here that accepts XML
data as a post submission and deserializes it in a web service.

It might help you work out an alternative. Otherwise, I think MVP John
Skeet is the byte array expert in the dotnet.general group.

--
Regards

John Timney
ASP.NET MVP
Microsoft Regional Director

 

[Guest]

Thanks John. Can you give me the link to article you suggested.

Regards
Danny

I dont have an answer for you, but theres an example here that accepts XML
data as a post submission and deserializes it in a web service.

It might help you work out an alternative. Otherwise, I think MVP John
Skeet is the byte array expert in the dotnet.general group.

--
Regards

John Timney
ASP.NET MVP
Microsoft Regional Director

I am working on a project in which a number of client applications will be
posting xml documents as a byte array to an ASP.NET page on our web
server. I
am trying to simulate the process and run into problems.

Sending code:

ASCIIEncoding encoding = new ASCIIEncoding();

string lcUrl = "http://localhost/test/receive.aspx";
HttpWebRequest loHttp =
(HttpWebRequest) WebRequest.Create(lcUrl);

string lcPostData =
"XMLData=" + HttpUtility.UrlEncode("<Data>Test
Data</Data>");

loHttp.Method="POST";
loHttp.ContentType = "application/x-www-form-urlencoded";
byte [] lbPostBuffer = encoding.GetBytes(lcPostData);
loHttp.ContentLength = lbPostBuffer.Length;

Stream loPostData = loHttp.GetRequestStream();
loPostData.Write(lbPostBuffer,0,lbPostBuffer.Length);
loPostData.Close();

HttpWebResponse loWebResponse = (HttpWebResponse)
loHttp.GetResponse();

Encoding enc = System.Text.Encoding.GetEncoding(1252);

StreamReader loResponseStream =
new StreamReader(loWebResponse.GetResponseStream());

string lcHtml = loResponseStream.ReadToEnd();

Response.Write (lcHtml);

loWebResponse.Close();
loResponseStream.Close();

Receiving code:
Stream str = Request.InputStream;
int strLen = (int)str.Length;
byte[] bArr = new byte[strLen];
Int32 bytes = str.Read(bArr,0,strLen);
string strmContents =
System.Text.Encoding.ASCII.GetString(bArr,
0, bytes);
Response.Write (strmContents);


The above code will work with XMLData=xyz. But when "<" or ">" is in the
string as above, an error is returned from the receiving page:
The remote server returned an error: (500) Internal Server Error

If the following line is commented out, it works:
loHttp.ContentType = "application/x-www-form-urlencoded";

When it works with the above line commented out, the result displayed is:
XMLData=%3cData%3eTest+Data%3c%2fData%3e

If I use:
string strXMLData = System.Text.Encoding.ASCII.GetString(bArr);
strXMLData = HttpUtility.UrlDecode(strXMLData);
Response.Write (strXMLData);

The result I get is: XMLData=Test Data
I need the end result to be <Data>Test Data</Data>"

Where am I going wrong?

Thanks for any help

 

[Bruce Barker]

you need to turn validateRequest off for this page. by default, asp.net
throws an error if a "<" is found in the form data. this is to handle bady
coded sites that allow script injection.

-- bruce (sqlwork.com)

 

[John Timney \( MVP \)]

Sorry, heres the link, you might not need it with Bruces answer
though.......hope it helps.

http://www.prescod.net/rest/dotnet/

--
Regards

John Timney
ASP.NET MVP
Microsoft Regional Director

Thanks John. Can you give me the link to article you suggested.

Regards
Danny

I dont have an answer for you, but theres an example here that accepts
XML
data as a post submission and deserializes it in a web service.

It might help you work out an alternative. Otherwise, I think MVP John
Skeet is the byte array expert in the dotnet.general group.

--
Regards

John Timney
ASP.NET MVP
Microsoft Regional Director

I am working on a project in which a number of client applications will
be
posting xml documents as a byte array to an ASP.NET page on our web
server. I
am trying to simulate the process and run into problems.

Sending code:

ASCIIEncoding encoding = new ASCIIEncoding();

string lcUrl = "http://localhost/test/receive.aspx";
HttpWebRequest loHttp =
(HttpWebRequest) WebRequest.Create(lcUrl);

string lcPostData =
"XMLData=" + HttpUtility.UrlEncode("<Data>Test
Data</Data>");

loHttp.Method="POST";
loHttp.ContentType = "application/x-www-form-urlencoded";
byte [] lbPostBuffer = encoding.GetBytes(lcPostData);
loHttp.ContentLength = lbPostBuffer.Length;

Stream loPostData = loHttp.GetRequestStream();
loPostData.Write(lbPostBuffer,0,lbPostBuffer.Length);
loPostData.Close();

HttpWebResponse loWebResponse = (HttpWebResponse)
loHttp.GetResponse();

Encoding enc = System.Text.Encoding.GetEncoding(1252);

StreamReader loResponseStream =
new StreamReader(loWebResponse.GetResponseStream());

string lcHtml = loResponseStream.ReadToEnd();

Response.Write (lcHtml);

loWebResponse.Close();
loResponseStream.Close();

Receiving code:
Stream str = Request.InputStream;
int strLen = (int)str.Length;
byte[] bArr = new byte[strLen];
Int32 bytes = str.Read(bArr,0,strLen);
string strmContents =
System.Text.Encoding.ASCII.GetString(bArr,
0, bytes);
Response.Write (strmContents);


The above code will work with XMLData=xyz. But when "<" or ">" is in
the
string as above, an error is returned from the receiving page:
The remote server returned an error: (500) Internal Server Error

If the following line is commented out, it works:
loHttp.ContentType = "application/x-www-form-urlencoded";

When it works with the above line commented out, the result displayed
is:
XMLData=%3cData%3eTest+Data%3c%2fData%3e

If I use:
string strXMLData =
System.Text.Encoding.ASCII.GetString(bArr);
strXMLData = HttpUtility.UrlDecode(strXMLData);
Response.Write (strXMLData);

The result I get is: XMLData=Test Data
I need the end result to be <Data>Test Data</Data>"

Where am I going wrong?

Thanks for any help

 

[Guest]

Hi Bruce

I tried what you said and still get the error. What would be the most common
approach for sending xml documents from multiple clients to a server?

Thanks
Danny

you need to turn validateRequest off for this page. by default, asp.net
throws an error if a "<" is found in the form data. this is to handle bady
coded sites that allow script injection.

-- bruce (sqlwork.com)

I am working on a project in which a number of client applications will be
posting xml documents as a byte array to an ASP.NET page on our web
server. I
am trying to simulate the process and run into problems.

Sending code:

ASCIIEncoding encoding = new ASCIIEncoding();

string lcUrl = "http://localhost/test/receive.aspx";
HttpWebRequest loHttp =
(HttpWebRequest) WebRequest.Create(lcUrl);

string lcPostData =
"XMLData=" + HttpUtility.UrlEncode("<Data>Test
Data</Data>");

loHttp.Method="POST";
loHttp.ContentType = "application/x-www-form-urlencoded";
byte [] lbPostBuffer = encoding.GetBytes(lcPostData);
loHttp.ContentLength = lbPostBuffer.Length;

Stream loPostData = loHttp.GetRequestStream();
loPostData.Write(lbPostBuffer,0,lbPostBuffer.Length);
loPostData.Close();

HttpWebResponse loWebResponse = (HttpWebResponse)
loHttp.GetResponse();

Encoding enc = System.Text.Encoding.GetEncoding(1252);

StreamReader loResponseStream =
new StreamReader(loWebResponse.GetResponseStream());

string lcHtml = loResponseStream.ReadToEnd();

Response.Write (lcHtml);

loWebResponse.Close();
loResponseStream.Close();

Receiving code:
Stream str = Request.InputStream;
int strLen = (int)str.Length;
byte[] bArr = new byte[strLen];
Int32 bytes = str.Read(bArr,0,strLen);
string strmContents =
System.Text.Encoding.ASCII.GetString(bArr,
0, bytes);
Response.Write (strmContents);


The above code will work with XMLData=xyz. But when "<" or ">" is in the
string as above, an error is returned from the receiving page:
The remote server returned an error: (500) Internal Server Error

If the following line is commented out, it works:
loHttp.ContentType = "application/x-www-form-urlencoded";

When it works with the above line commented out, the result displayed is:
XMLData=%3cData%3eTest+Data%3c%2fData%3e

If I use:
string strXMLData = System.Text.Encoding.ASCII.GetString(bArr);
strXMLData = HttpUtility.UrlDecode(strXMLData);
Response.Write (strXMLData);

The result I get is: XMLData=Test Data
I need the end result to be <Data>Test Data</Data>"

Where am I going wrong?

Thanks for any help