Upcoming patches will add support for JSON output from hgweb.
Because JSON output from the templater is hard to read and because it
is easy to introduce malformed JSON, we introduce a JSON processing
mode to get-with-headers.py that will parse and pretty print JSON
from HTTP responses. This will make tests easier to read and write
and it will ensure hgweb is emitting well-formed JSON.
This patch fixes a bug where hgweb would send an incomplete HTTP
response.
If an uncaught exception is raised when hgweb is processing a request,
hgweb attempts to send a generic error response and log that exception.
The server defaults to chunked transfer coding. If an uncaught exception
occurred, it was sending the error response string / chunk properly.
However, RFC 7230 Section 4.1 mandates a 0 size last chunk be sent to
indicate end of the entity body. hgweb was failing to send this last
chunk. As a result, properly written HTTP clients would assume more data
was coming and they would likely time out waiting for another chunk to
arrive.
Mercurial's own test harness was paving over the improper HTTP behavior
by not attempting to read the response body if the status code was 500.
This incorrect workaround was added in faced8f5c2af and has been removed
with this patch.
If the server had an internal error and returned 500, there's nothing
to read, so "response.read()" blocks indefinitely. Only output the
response if there's really a response.
Fixes HTTP protocol violation introduced in e4a5f5db7028. 'hg serve' would show
a stacktrace when loading pages that not had been modified.
There was test coverage for this, but the wrong response headers wasn't shown
and thus not detected.
get-with-headers.py took the http GET parameter as a command line parameter
that had to start with '/'. MSYS on windows will mangle such paths.
Instead of applying a workaround everywhere (such as an extra '/') we let
get-with-headers.py add the mandatory '/'. That is consistent with the
url path handling in the Mercurial url class.
A few tests sent 'GET ?cmd=...' which is invalid. They will now send 'GET
/?cmd=...'.
This will not enable any tests for being run on windows - only remove one
reason they were disabled.
