Mercurial > hg
view tests/get-with-headers.py @ 29859:a1092e2d70a3
help: internals topic for wire protocol
The Mercurial wire protocol is under-documented. This includes a lack
of source docstrings and comments as well as pages on the official
wiki.
This patch adds the beginnings of "internals" documentation on the
wire protocol.
The documentation should have nearly complete coverage on the
lower-level parts of the protocol, such as the different transport
mechanims, how commands and arguments are sent, capabilities, and,
of course, the commands themselves.
As part of writing this documentation, I discovered a number of
deficiencies in the protocol and bugs in the implementation. I've
started sending patches for some of the issues. I hope to send a lot
more.
This patch starts with the scaffolding for a new internals page.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Mon, 22 Aug 2016 19:46:39 -0700 |
parents | 0c741fd6158a |
children | e75463e3179f |
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#!/usr/bin/env python """This does HTTP GET requests given a host:port and path and returns a subset of the headers plus the body of the result.""" from __future__ import absolute_import, print_function import json import os import sys from mercurial import ( util, ) httplib = util.httplib try: import msvcrt msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY) msvcrt.setmode(sys.stderr.fileno(), os.O_BINARY) except ImportError: pass twice = False if '--twice' in sys.argv: sys.argv.remove('--twice') twice = True headeronly = False if '--headeronly' in sys.argv: sys.argv.remove('--headeronly') headeronly = True formatjson = False if '--json' in sys.argv: sys.argv.remove('--json') formatjson = True tag = None def request(host, path, show): assert not path.startswith('/'), path global tag headers = {} if tag: headers['If-None-Match'] = tag conn = httplib.HTTPConnection(host) conn.request("GET", '/' + path, None, headers) response = conn.getresponse() print(response.status, response.reason) if show[:1] == ['-']: show = sorted(h for h, v in response.getheaders() if h.lower() not in show) for h in [h.lower() for h in show]: if response.getheader(h, None) is not None: print("%s: %s" % (h, response.getheader(h))) if not headeronly: print() data = response.read() # Pretty print JSON. This also has the beneficial side-effect # of verifying emitted JSON is well-formed. if formatjson: # json.dumps() will print trailing newlines. Eliminate them # to make tests easier to write. data = json.loads(data) lines = json.dumps(data, sort_keys=True, indent=2).splitlines() for line in lines: print(line.rstrip()) else: sys.stdout.write(data) if twice and response.getheader('ETag', None): tag = response.getheader('ETag') return response.status status = request(sys.argv[1], sys.argv[2], sys.argv[3:]) if twice: status = request(sys.argv[1], sys.argv[2], sys.argv[3:]) if 200 <= status <= 305: sys.exit(0) sys.exit(1)