#!/usr/bin/env python3

"""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

import argparse

import json

import os

import sys

from mercurial import (

    pycompat,

    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

stdout = getattr(sys.stdout, 'buffer', sys.stdout)

parser = argparse.ArgumentParser()

parser.add_argument('--twice', action='store_true')

parser.add_argument('--headeronly', action='store_true')

parser.add_argument('--json', action='store_true')

parser.add_argument('--hgproto')

parser.add_argument(

    '--requestheader',

    nargs='*',

    default=[],

    help='Send an additional HTTP request header. Argument '

    'value is <header>=<value>',

)

parser.add_argument('--bodyfile', help='Write HTTP response body to a file')

parser.add_argument('host')

parser.add_argument('path')

parser.add_argument('show', nargs='*')

args = parser.parse_args()

twice = args.twice

headeronly = args.headeronly

formatjson = args.json

hgproto = args.hgproto

requestheaders = args.requestheader

tag = None

def request(host, path, show):

    assert not path.startswith('/'), path

    global tag

    headers = {}

    if tag:

        headers['If-None-Match'] = tag

    if hgproto:

        headers['X-HgProto-1'] = hgproto

    for header in requestheaders:

        key, value = header.split('=', 1)

        headers[key] = value

    conn = httplib.HTTPConnection(host)

    conn.request("GET", '/' + path, None, headers)

    response = conn.getresponse()

    stdout.write(

        b'%d %s\n' % (response.status, response.reason.encode('ascii'))

    )

    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:

            stdout.write(

                b"%s: %s\n"

                % (h.encode('ascii'), response.getheader(h).encode('ascii'))

            )

    if not headeronly:

        stdout.write(b'\n')

        data = response.read()

        if args.bodyfile:

            bodyfh = open(args.bodyfile, 'wb')

        else:

            bodyfh = stdout

        # 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 = pycompat.json_loads(data)

            lines = json.dumps(data, sort_keys=True, indent=2).splitlines()

            for line in lines:

                bodyfh.write(pycompat.sysbytes(line.rstrip()))

                bodyfh.write(b'\n')

        else:

            bodyfh.write(data)

        if args.bodyfile:

            bodyfh.close()

    if twice and response.getheader('ETag', None):

        tag = response.getheader('ETag')

    return response.status

status = request(args.host, args.path, args.show)

if twice:

    status = request(args.host, args.path, args.show)

if 200 <= status <= 305:

    sys.exit(0)

sys.exit(1)