#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#***************************************************************************
#                                  _   _ ____  _
#  Project                     ___| | | |  _ \| |
#                             / __| | | | |_) | |
#                            | (__| |_| |  _ <| |___
#                             \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# SPDX-License-Identifier: curl
#
###########################################################################
#
import logging
import re

import pytest
from testenv import CurlClient, Env

log = logging.getLogger(__name__)


class TestBasic:

    # simple http: GET
    def test_01_01_http_get(self, env: Env, httpd):
        curl = CurlClient(env=env)
        url = f'http://{env.domain1}:{env.http_port}/data.json'
        r = curl.http_get(url=url)
        r.check_response(http_status=200)
        assert r.json['server'] == env.domain1

    # simple https: GET, any http version
    @pytest.mark.skipif(condition=not Env.have_ssl_curl(), reason="curl without SSL")
    def test_01_02_https_get(self, env: Env, httpd):
        curl = CurlClient(env=env)
        url = f'https://{env.domain1}:{env.https_port}/data.json'
        r = curl.http_get(url=url)
        r.check_response(http_status=200)
        assert r.json['server'] == env.domain1

    # simple https: GET, h2 wanted and got
    @pytest.mark.skipif(condition=not Env.have_ssl_curl(), reason="curl without SSL")
    @pytest.mark.skipif(condition=not Env.have_h2_curl(), reason="curl without h2")
    def test_01_03_h2_get(self, env: Env, httpd):
        curl = CurlClient(env=env)
        url = f'https://{env.domain1}:{env.https_port}/data.json'
        r = curl.http_get(url=url, extra_args=['--http2'])
        r.check_response(http_status=200, protocol='HTTP/2')
        assert r.json['server'] == env.domain1

    # simple https: GET, h2 unsupported, fallback to h1
    @pytest.mark.skipif(condition=not Env.have_ssl_curl(), reason="curl without SSL")
    @pytest.mark.skipif(condition=not Env.have_h2_curl(), reason="curl without h2")
    def test_01_04_h2_unsupported(self, env: Env, httpd):
        curl = CurlClient(env=env)
        url = f'https://{env.domain2}:{env.https_port}/data.json'
        r = curl.http_get(url=url, extra_args=['--http2'])
        r.check_response(http_status=200, protocol='HTTP/1.1')
        assert r.json['server'] == env.domain2

    # simple h3: GET, want h3 and get it
    @pytest.mark.skipif(condition=not Env.have_h3(), reason="h3 not supported")
    def test_01_05_h3_get(self, env: Env, httpd, nghttpx):
        curl = CurlClient(env=env)
        url = f'https://{env.domain1}:{env.h3_port}/data.json'
        r = curl.http_get(url=url, extra_args=['--http3-only'])
        r.check_response(http_status=200, protocol='HTTP/3')
        assert r.json['server'] == env.domain1

    # simple download, check connect/handshake timings
    @pytest.mark.skipif(condition=not Env.have_ssl_curl(), reason="curl without SSL")
    @pytest.mark.parametrize("proto", Env.http_protos())
    def test_01_06_timings(self, env: Env, httpd, nghttpx, proto):
        curl = CurlClient(env=env)
        url = f'https://{env.authority_for(env.domain1, proto)}/data.json'
        r = curl.http_download(urls=[url], alpn_proto=proto, with_stats=True)
        r.check_stats(http_status=200, count=1,
                      remote_port=env.port_for(alpn_proto=proto),
                      remote_ip='127.0.0.1')
        # there are cases where time_connect is reported as 0
        assert r.stats[0]['time_connect'] >= 0, f'{r.stats[0]}'
        assert r.stats[0]['time_appconnect'] > 0, f'{r.stats[0]}'
        # ports are reported correctly
        assert r.stats[0]['remote_port'] == env.port_for(proto), f'{r.dump_logs()}'
        assert r.stats[0]['local_port'] > 0, f'{r.dump_logs()}'

    # simple https: HEAD
    @pytest.mark.parametrize("proto", Env.http_protos())
    @pytest.mark.skipif(condition=not Env.have_ssl_curl(), reason="curl without SSL")
    def test_01_07_head(self, env: Env, httpd, nghttpx, proto):
        curl = CurlClient(env=env)
        url = f'https://{env.authority_for(env.domain1, proto)}/data.json'
        r = curl.http_download(urls=[url], with_stats=True, with_headers=True,
                               extra_args=['-I'])
        r.check_stats(http_status=200, count=1, exitcode=0,
                      remote_port=env.port_for(alpn_proto=proto),
                      remote_ip='127.0.0.1')
        # got the Content-Length: header, but did not download anything
        assert r.responses[0]['header']['content-length'] == '30', f'{r.responses[0]}'
        assert r.stats[0]['size_download'] == 0, f'{r.stats[0]}'

    # http: GET for HTTP/2, see Upgrade:, 101 switch
    @pytest.mark.skipif(condition=not Env.have_h2_curl(), reason="curl without h2")
    def test_01_08_h2_upgrade(self, env: Env, httpd):
        curl = CurlClient(env=env)
        url = f'http://{env.domain1}:{env.http_port}/data.json'
        r = curl.http_get(url=url, extra_args=['--http2'])
        r.check_exit_code(0)
        assert len(r.responses) == 2, f'{r.responses}'
        assert r.responses[0]['status'] == 101, f'{r.responses[0]}'
        assert r.responses[1]['status'] == 200, f'{r.responses[1]}'
        assert r.responses[1]['protocol'] == 'HTTP/2', f'{r.responses[1]}'
        assert r.json['server'] == env.domain1

    # http: GET for HTTP/2 with prior knowledge
    @pytest.mark.skipif(condition=not Env.have_h2_curl(), reason="curl without h2")
    def test_01_09_h2_prior_knowledge(self, env: Env, httpd):
        curl = CurlClient(env=env)
        url = f'http://{env.domain1}:{env.http_port}/data.json'
        r = curl.http_get(url=url, extra_args=['--http2-prior-knowledge'])
        r.check_exit_code(0)
        assert len(r.responses) == 1, f'{r.responses}'
        assert r.response['status'] == 200, f'{r.responsw}'
        assert r.response['protocol'] == 'HTTP/2', f'{r.response}'
        assert r.json['server'] == env.domain1

    # http: strip TE header in HTTP/2 requests
    @pytest.mark.skipif(condition=not Env.have_h2_curl(), reason="curl without h2")
    def test_01_10_te_strip(self, env: Env, httpd):
        curl = CurlClient(env=env)
        url = f'https://{env.authority_for(env.domain1, "h2")}/data.json'
        r = curl.http_get(url=url, extra_args=['--http2', '-H', 'TE: gzip'])
        r.check_exit_code(0)
        assert len(r.responses) == 1, f'{r.responses}'
        assert r.responses[0]['status'] == 200, f'{r.responses[1]}'
        assert r.responses[0]['protocol'] == 'HTTP/2', f'{r.responses[1]}'

    # http: large response headers
    # send 48KB+ sized response headers to check we handle that correctly
    # larger than 64KB headers expose a bug in Apache HTTP/2 that is not
    # RSTing the stream correctly when its internal limits are exceeded.
    @pytest.mark.parametrize("proto", Env.http_protos())
    def test_01_11_large_resp_headers(self, env: Env, httpd, proto):
        curl = CurlClient(env=env)
        url = f'https://{env.authority_for(env.domain1, proto)}' \
            f'/curltest/tweak?x-hd={48 * 1024}'
        r = curl.http_get(url=url, alpn_proto=proto, extra_args=[])
        r.check_exit_code(0)
        assert len(r.responses) == 1, f'{r.responses}'
        assert r.responses[0]['status'] == 200, f'{r.responses}'

    # http: response headers larger than what curl buffers for
    @pytest.mark.skipif(condition=not Env.httpd_is_at_least('2.4.64'),
                        reason='httpd must be at least 2.4.64')
    @pytest.mark.parametrize("proto", Env.http_h1_h2_protos())
    def test_01_12_xlarge_resp_headers(self, env: Env, httpd, configures_httpd, proto):
        httpd.set_extra_config('base', [
            f'H2MaxHeaderBlockLen {130 * 1024}',
        ])
        httpd.reload_if_config_changed()
        curl = CurlClient(env=env)
        url = f'https://{env.authority_for(env.domain1, proto)}' \
            f'/curltest/tweak?x-hd={128 * 1024}'
        r = curl.http_get(url=url, alpn_proto=proto, extra_args=[])
        r.check_exit_code(0)
        assert len(r.responses) == 1, f'{r.responses}'
        assert r.responses[0]['status'] == 200, f'{r.responses}'

    # http: 1 response header larger than what curl buffers for
    @pytest.mark.skipif(condition=not Env.httpd_is_at_least('2.4.64'),
                        reason='httpd must be at least 2.4.64')
    @pytest.mark.parametrize("proto", Env.http_h1_h2_protos())
    def test_01_13_megalarge_resp_headers(self, env: Env, httpd, configures_httpd, proto):
        httpd.set_extra_config('base', [
            'LogLevel http2:trace2',
            f'H2MaxHeaderBlockLen {130 * 1024}',
        ])
        httpd.reload_if_config_changed()
        curl = CurlClient(env=env)
        url = f'https://{env.authority_for(env.domain1, proto)}' \
            f'/curltest/tweak?x-hd1={128 * 1024}'
        r = curl.http_get(url=url, alpn_proto=proto, extra_args=[])
        if proto == 'h2':
            r.check_exit_code(16)  # CURLE_HTTP2
        else:
            r.check_exit_code(100)  # CURLE_TOO_LARGE

    # http: several response headers, together > 256 KB
    # nghttp2 error -905: Too many CONTINUATION frames following a HEADER frame
    @pytest.mark.skipif(condition=not Env.httpd_is_at_least('2.4.64'),
                        reason='httpd must be at least 2.4.64')
    @pytest.mark.parametrize("proto", Env.http_h1_h2_protos())
    def test_01_14_gigalarge_resp_headers(self, env: Env, httpd, configures_httpd, proto):
        httpd.set_extra_config('base', [
            'LogLevel http2:trace2',
            f'H2MaxHeaderBlockLen {1024 * 1024}',
        ])
        httpd.reload_if_config_changed()
        curl = CurlClient(env=env)
        url = f'https://{env.authority_for(env.domain1, proto)}' \
            f'/curltest/tweak?x-hd={256 * 1024}'
        r = curl.http_get(url=url, alpn_proto=proto, extra_args=[])
        if proto == 'h2':
            r.check_exit_code(16)  # CURLE_HTTP2
        else:
            r.check_exit_code(0)   # 1.1 can do

    # http: one response header > 256 KB
    @pytest.mark.skipif(condition=not Env.httpd_is_at_least('2.4.64'),
                        reason='httpd must be at least 2.4.64')
    @pytest.mark.parametrize("proto", Env.http_h1_h2_protos())
    def test_01_15_gigalarge_resp_headers(self, env: Env, httpd, configures_httpd, proto):
        httpd.set_extra_config('base', [
            'LogLevel http2:trace2',
            f'H2MaxHeaderBlockLen {1024 * 1024}',
        ])
        httpd.reload_if_config_changed()
        curl = CurlClient(env=env)
        url = f'https://{env.authority_for(env.domain1, proto)}' \
            f'/curltest/tweak?x-hd1={256 * 1024}'
        r = curl.http_get(url=url, alpn_proto=proto, extra_args=[])
        if proto == 'h2':
            r.check_exit_code(16)  # CURLE_HTTP2
        else:
            r.check_exit_code(100)  # CURLE_TOO_LARGE

    # http: invalid request headers, GET, issue #16998
    @pytest.mark.parametrize("proto", Env.http_protos())
    def test_01_16_inv_req_get(self, env: Env, httpd, nghttpx, proto):
        curl = CurlClient(env=env)
        url = f'https://{env.authority_for(env.domain1, proto)}/curltest/echo'
        r = curl.http_get(url=url, alpn_proto=proto, extra_args=[
            '-H', "a: a\x0ab"
        ])
        # on h1, request is sent, h2/h3 reject
        if proto == 'http/1.1':
            r.check_exit_code(0)
        else:
            r.check_exit_code(43)

    # http: special handling of TE request header
    @pytest.mark.parametrize("te_in, te_out", [
        pytest.param('trailers', 'trailers', id='trailers'),
        pytest.param('chunked', None, id='chunked'),
        pytest.param('gzip, trailers', 'trailers', id='gzip+trailers'),
        pytest.param('gzip ;q=0.2;x="y,x", trailers', 'trailers', id='gzip+q+x+trailers'),
        pytest.param('gzip ;x="trailers", chunks', None, id='gzip+x+chunks'),
    ])
    @pytest.mark.skipif(condition=not Env.have_h2_curl(), reason="curl without h2")
    def test_01_17_TE(self, env: Env, httpd, te_in, te_out):
        proto = 'h2'
        curl = CurlClient(env=env)
        url = f'https://{env.authority_for(env.domain1, proto)}/curltest/echo'
        r = curl.http_download(urls=[url], alpn_proto=proto, with_stats=True,
                               with_headers=True,
                               extra_args=['-H', f'TE: {te_in}'])
        r.check_response(200)
        if te_out is not None:
            assert r.responses[0]['header']['request-te'] == te_out, f'{r.responses[0]}'
        else:
            assert 'request-te' not in r.responses[0]['header'], f'{r.responses[0]}'

    # check that an existing https: connection is not reused for http:
    @pytest.mark.skipif(condition=not Env.have_h2_curl(), reason="curl without h2")
    def test_01_18_tls_reuse(self, env: Env, httpd):
        proto = 'h2'
        curl = CurlClient(env=env)
        url1 = f'https://{env.authority_for(env.domain1, proto)}/data.json'
        url2 = f'http://{env.authority_for(env.domain1, proto)}/data.json'
        r = curl.http_download(urls=[url1, url2], alpn_proto=proto, with_stats=True)
        assert len(r.stats) == 2
        assert r.total_connects == 2, f'{r.dump_logs()}'

    # check that an existing http: connection is not reused for https:
    @pytest.mark.skipif(condition=not Env.have_h2_curl(), reason="curl without h2")
    def test_01_19_plain_reuse(self, env: Env, httpd):
        proto = 'h2'
        curl = CurlClient(env=env)
        url1 = f'http://{env.domain1}:{env.http_port}/data.json'
        url2 = f'https://{env.domain1}:{env.http_port}/data.json'
        r = curl.http_download(urls=[url1, url2], alpn_proto=proto, with_stats=True)
        assert len(r.stats) == 2
        assert r.total_connects == 2, f'{r.dump_logs()}'

    # use a custom method containing a space
    # check that h2/h3 did send that in the :method pseudo header. #19543
    @pytest.mark.skipif(condition=not Env.curl_is_verbose(), reason="needs verbosecurl")
    @pytest.mark.parametrize("proto", Env.http_protos())
    def test_01_20_method_space(self, env: Env, proto, httpd):
        curl = CurlClient(env=env)
        method = 'IN SANE'
        url = f'https://{env.authority_for(env.domain1, proto)}/curltest/echo'
        r = curl.http_download(urls=[url], alpn_proto=proto, with_stats=True,
                               extra_args=['-X', method])
        if proto == 'h2' or proto == 'h3':
            # h2+3 may close the connection for such invalid requests
            re_m = re.compile(r'.*\[:method: ([^\]]+)\].*')
            lines = [line for line in r.trace_lines if re_m.match(line)]
            assert len(lines) == 1, f'{r.dump_logs()}'
            m = re_m.match(lines[0])
            assert m.group(1) == method, f'{r.dump_logs()}'
        else:
            # h1 should give us a real response
            assert len(r.stats) == 1
            r.check_response(http_status=400)
