Transparent GZIP with condition cache can cause ioexception

[pablolb]

WIth transparent gzip enabled, if the same resource is requested after it has been cached with cache validators, an ioexception is thrown.

[pablolb]

This can happen when using okhttp with volley for example.

Here is an example test & fix
pablolb@ab61aea

[swankjesse]

Thanks! I'll take a look.

If you fill out our contributor's agreement and submit a pull request I can use your code.

[pablolb]

Sorry, now its duplicated. It did follow the execution with the debugger for a couple of test cases to understand the issue but still... please do take a look, tests ran ok, but as it is re-entrant code somebody with better knowledge of the code-base should definitely have a better understanding.

[codefromthecrypt]

What does the IOException look like when this fails without the patch?

[swankjesse]

One other option is to change initContentStream to be called differently when hasResponseBody() returns null. That should be relatively straightforward and make it possible to use caches external to OkHttp.

[swankjesse]

@pablolb please give the fix a try!