httpWebRequest issue

[gerbrand colombier]

Hello,

I hope somebody has a good explanation for this issue.

Okay I'm having troubles with the httpWebRequest method. I need to
download reports from a specified server (can't give these details). Now
I don't have trouble with an "HTTPS" url but I with an "HTTP" url I get
the error :

error: The server committed a protocol violation. Section=ResponseHeader
Detail=Header name is invalid

This the first time I got this error in c#.net. I tried this in Java and
there I didn't had any problems. So I'm kind of lost.

I search the internet to see what the "ProtocolViolationException"
throws. I found this on the msdn site:

ProtocolViolationException :
Method is GET or HEAD, and either ContentLength is greater or equal to
zero or SendChunked is true.
-or-
KeepAlive is true, AllowWriteStreamBuffering is false, ContentLength is
-1, SendChunked is false, and Method is POST or PUT.

I did an output of these properties and some how these don't have the
values mention to trigger the ProtocolViolationException.

So my question is, How is this possible?

this is my testClass:

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;

namespace adlogix_views
{
static class httpTestClass
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{

string page = "";
try
{
// write a line of text to the file
HttpWebRequest wr =
(HttpWebRequest)WebRequest.Create("http://www.mywebsite.com");

string userPass = "myUsername:myPassword";
string encoding =
Convert.ToBase64String(Encoding.ASCII.GetBytes(userPass));

wr.Headers.Add("Authorization", "Basic " + encoding);
wr.PreAuthenticate = true;

Console.WriteLine("Method = " + wr.Method);
Console.WriteLine("ContentLength = " +
wr.ContentLength);
Console.WriteLine("SendChunked = " + wr.SendChunked);
Console.WriteLine("KeepAlive = " + wr.KeepAlive);
Console.WriteLine("AllowWriteStreamBuffering = " +
wr.AllowWriteStreamBuffering);

HttpWebResponse ws = (HttpWebResponse)wr.GetResponse();
Stream str = ws.GetResponseStream();
StreamReader sr = new StreamReader(str);
while ((page = sr.ReadLine()) != null)
{
Console.WriteLine(page);
}


}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}
}


this is the output of the properties

output: Method = GET
ContentLength = -1
SendChunked = False
KeepAlive = True
AllowWriteStreamBuffering = True


I hope somebody can help me with this.

 

[Jon Skeet [C# MVP]]

I hope somebody has a good explanation for this issue.

Okay I'm having troubles with the httpWebRequest method. I need to
download reports from a specified server (can't give these details). Now
I don't have trouble with an "HTTPS" url but I with an "HTTP" url I get
the error :

error: The server committed a protocol violation. Section=ResponseHeader
Detail=Header name is invalid

This the first time I got this error in c#.net. I tried this in Java and
there I didn't had any problems. So I'm kind of lost.

I search the internet to see what the "ProtocolViolationException"
throws. I found this on the msdn site:

ProtocolViolationException :
Method is GET or HEAD, and either ContentLength is greater or equal to
zero or SendChunked is true.
-or-
KeepAlive is true, AllowWriteStreamBuffering is false, ContentLength is
-1, SendChunked is false, and Method is POST or PUT.

I did an output of these properties and some how these don't have the
values mention to trigger the ProtocolViolationException.

So my question is, How is this possible?

You've written out the *request* properties. If it's saying that the
*server* committed a protocol violation, that would suggest that it's
the *response* which is invalid.

Personally at this stage, I usually run WireShark to see what's
actually coming back over the network.