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wireproto: define permissions-based routing of HTTPv2 wire protocol Now that we have a scaffolding for serving version 2 of the HTTP protocol, let's start implementing it. A good place to start is URL routing and basic request processing semantics. We can focus on content types, capabilities detect, etc later. Version 2 of the HTTP wire protocol encodes the needed permissions of the request in the URL path. The reasons for this are documented in the added documentation. In short, a) it makes it really easy and fail proof for server administrators to implement path-based authentication and b) it will enable clients to realize very early in a server exchange that authentication will be required to complete the operation. This latter point avoids all kinds of complexity and problems, like dealing with Expect: 100-continue and clients finding out later during `hg push` that they need to provide authentication. This will avoid the current badness where clients send a full bundle, get an HTTP 403, provide authentication, then retransmit the bundle. In order to implement command checking, we needed to implement a protocol handler for the new wire protocol. Our handler is just small enough to run the code we've implemented. Tests for the defined functionality have been added. I very much want to refactor the permissions checking code and define a better response format. But this can be done later. Nothing is covered by backwards compatibility at this point. Differential Revision: https://phab.mercurial-scm.org/D2836
author Gregory Szorc <gregory.szorc@gmail.com>
date Mon, 19 Mar 2018 16:43:47 -0700
parents 19ee4923a2b6
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