CODEWITHSUNDEEP
c#.net-4.0http-headershttprequest
Cal
Cal

Reputation: 867

C# httprequest headers wiht a colon .Net 4.0

When inspecting a third party api using chrome browser's F12 tool I found there are several interesting headers listed:

:authority:m.somedomain.com
:method:GET
:path:/api/somevalues
:scheme:https

Along with some headers I'm familiar with, such as accept, accept-encoding, etc.

I'm using .Net 4.0 to make http/https requests. When trying to add these headers starting with a colon, an error is thrown on the first item:

        httpRequest.Headers.Add(":authority", "m.somedomain.com");
        httpRequest.Headers.Add(":method", "get");
        httpRequest.Headers.Add(":path", sPath);
        httpRequest.Headers.Add(":scheme", "https");

Error message:

Specified value has invalid HTTP Header characters.

After some searching I found article talking about http/2. However in .NET 4.0 there are only http/1.0 and http/1.1 available.

Does that mean I need to upgrade to newer .NET version?

Thanks in advance.

Upvotes: 1

Views: 1424

Answers (1)

Kent Kostelac
Kent Kostelac

Reputation: 2446

Possibly. http/2 is supported from .NET version 4.6.2.

Click on the Project tab and select properties at the bottom. And then change your .NET version to 4.6.2.

Also I am 99.9% sure that you shouldn't include semi colon in your headers.

Further:

httpRequest.Headers.Add(":method", "get");

The request-method should not be defined in the header. Do it like so.

httpRequest.Method = "GET";

The scheme is usually indicated by the prefix of your url. ie:

string webAddr = "https://www.google.com/";
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(webAddr);

Upvotes: 1

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