I have an ashx handler, and the response is not gzipped. The content-encoding received by the client is empty.
The IIS settings for the site have static and dynamic compression enabled.
Research of similar problems shows some people have an httpCompression node in the web server node of IIS configuration editor. I do not have such a node. I have a url compression node, where I have set everything to true. Perhaps that is IIS version dependent. The op system is Windows Server 2008 R2.
I am about to try to "force" compression using the filter property and the GZipstream class (credit to Rick Strahl's blog). If anyone can tell my why IIS is not "auto compressing" or can point to any gotchas in my workaround I would be grateful.
Update: attaching GzipStream to the response filter reduced the content length by half as seen by the client, which seems to indicate the "manual" compression is doing something.
I am aware this was previously asked here:
.ashx handler not getting gzip compressed despite IIS Config setting
However, the previous question did not receive any answers, so I am asking the question again.
Please check if you are adding Accept-Encoding", "gzip" in request headers while making HTTP request.