如何在Twitter API Wp7中解压缩gzip QueryResponse？

Question

I have problem like this https://dev.twitter.com/discussions/4563

               if (webResponse.Headers["Content-Encoding"] == "gzip")
                {
                    byte[] bytes = UTF8Encoding.Unicode.GetBytes(stream);
                    MemoryStream ms = new MemoryStream(bytes);
                    var rstream = new ICSharpCode.SharpZipLib.GZip.GZipInputStream(ms);
                    using (var reader = new StreamReader(rstream, Encoding.UTF8))
                    {
                        var st = reader.ReadToEnd();// Exception here: "Error baseInputStream GZIP header,  second byte doesn't match"
                        parameters = HelperMethods.GetQueryParameters(st);
                    }
                }

I use this lib: http://slsharpziplib.codeplex.com/

Update: I use RestClient for post tweet only. For login I use:

var AccessTokenQuery = oAuthHelper.GetAccessTokenQuery(OAuthTokenKey, tokenSecret, VerifyPin);
            AccessTokenQuery.QueryResponse += new EventHandler<WebQueryResponseEventArgs>(AccessTokenQuery_QueryResponse);
            AccessTokenQuery.RequestAsync(TwitterSettings.AccessTokenUri, null);

Answer 1

It looks like the gzip response you are receiving isn't quite what SharpZipLib is expecting.

The error you are getting is from SharpZipLib/src/GZIP/GzipInputStream.cs and is probably from this line:

if (magic != (GZipConstants.GZIP_MAGIC & 0xFF)) {
                throw new GZipException("Error GZIP header,  second magic byte doesn't match");
}

Try saving the stream to a file and then take a look at it. See if you can unpack it with 7-zip, etc. Then once you know what's wrong you can go from there.

Update:

There appears to be a solution to the problem you are having at the end of the discussion you linked to and I wanted to make sure you were aware of it:

@SMCApps I caught a break...

 Dim client = New RestClient() With { _ .Authority = "https://api.twitter.com/oauth", _ .Credentials = credentials, _ .HasElevatedPermissions = True, _ .SilverlightAcceptEncodingHeader = "gzip", _ .DecompressionMethods = Silverlight.Compat.DecompressionMethods.GZip _ } 

Answer 2

I faced the same problem, I solved it by updating the Hammock to latest version. You can get it at http://nuget.org/packages/Hammock

After updating, It worked only when I commented the

DecompressionMethods =Hammock.Silverlight.Compat.DecompressionMethods.GZip

line from my Oauth request. I'm not sure how n why?