Content-Length in cache files.

Hi,

I am occasionally saw cache file without the Content-Length header.
Wondering if this header should always be there?
Looking through the code that reads cache file, it seems that cache file
without Content-Length is expected, at least not a error.

But when the cache truncate code truncates a cache without the
Content_length,  the cache will be corrupted because the next time polipo
read the file, it would have to make the size as the length.

Is there a code path that will lead to a cache file to not having the
Content-Length? I know the polipo won't have the content length until the
last chunk if the content is chunk encoded. If there is no such code path
possible, then I would guess the corrupted cache is because a unexpected
crash. Should I change the polipo to ignore or destroy a cache file that
don't have the Content-Length header?


Best Regards,
Ming
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