hgweb: ensure all wsgi environment values are str Previously, we had a few entries that were bytes on Python 3. PEP-0333 states that all entries must be the native str type (bytes on Python 2, str on Python 3). This required a number of changes to hgweb_mod to unbreak things on Python 3. I suspect there still may be some regressions. I'm going to introduce a data structure that represents a parsed WSGI request in upcoming commits. This will hold bytes and will allow us to stop using raw literals throughout the WSGI code. Differential Revision: https://phab.mercurial-scm.org/D2730

wireproto: formalize permissions checking as part of protocol interface Per the inline comment desiring to formalize permissions checking in the protocol interface, we do that. I'm not convinced this is the best way to go about things. I would love for there to e.g. be a better exception for denoting permissions problems. But it does feel strictly better than snipping attributes on the proto instance. Differential Revision: https://phab.mercurial-scm.org/D2719

wireproto: declare permissions requirements in @wireprotocommand (API) With the security patches from 4.5.2 merged into default, we now have a per-command attribute defining what permissions are needed to run that command. We now have a richer @wireprotocommand that can be extended to record additional command metadata. So we port the permissions mechanism to be based on @wireprotocommand. .. api:: hgweb_mod.perms and wireproto.permissions have been removed. Wire protocol commands should declare their required permissions in the @wireprotocommand decorator. Differential Revision: https://phab.mercurial-scm.org/D2718

wireprotoserver: check permissions in main dispatch function The permissions checking code merged from stable is out of place in the refactored hgweb_mod module. This commit moves the main call to wireprotoserver. We still have some lingering code in hgweb_mod. This will get addressed later. Differential Revision: https://phab.mercurial-scm.org/D2717

wireprotoserver: check if command available before calling it The previous behavior was just plain wrong. I have no clue how it landed. My guess is a merge conflict resolution gone wrong on my end a few weeks ago. Differential Revision: https://phab.mercurial-scm.org/D2716

py3: drop encoding.strio() Its buffered nature makes TextIOWrapper unsuitable for temporarily wrapping bytes I/O.