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#!/usr/bin/env python2.7
# Copyright 2015 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Generates the appropriate build.json data for all the naming tests."""
import yaml
import collections
import hashlib
import json
_LOCAL_DNS_SERVER_ADDRESS = '127.0.0.1:15353'
_TARGET_RECORDS_TO_SKIP_AGAINST_GCE = [
# TODO: enable this once able to upload the very large TXT record
# in this group to GCE DNS.
'ipv4-config-causing-fallback-to-tcp',
]
def _append_zone_name(name, zone_name):
return '%s.%s' % (name, zone_name)
def _build_expected_addrs_cmd_arg(expected_addrs):
out = []
for addr in expected_addrs:
out.append('%s,%s' % (addr['address'], str(addr['is_balancer'])))
return ';'.join(out)
def _data_for_type(r_type, r_data, common_zone_name):
if r_type in ['A', 'AAAA']:
return ' '.join(map(lambda x: '\"%s\"' % x, r_data))
if r_type == 'SRV':
assert len(r_data) == 1
target = r_data[0].split(' ')[3]
uploadable_target = '%s.%s' % (target, common_zone_name)
uploadable = r_data[0].split(' ')
uploadable[3] = uploadable_target
return '\"%s\"' % ' '.join(uploadable)
if r_type == 'TXT':
assert len(r_data) == 1
chunks = []
all_data = r_data[0]
cur = 0
# Split TXT records that span more than 255 characters (the single
# string length-limit in DNS) into multiple strings. Each string
# needs to be wrapped with double-quotes, and all inner double-quotes
# are escaped. The wrapping double-quotes and inner backslashes can be
# counted towards the 255 character length limit (as observed with gcloud),
# so make sure all strings fit within that limit.
while len(all_data[cur:]) > 0:
next_chunk = '\"'
while len(next_chunk) < 254 and len(all_data[cur:]) > 0:
if all_data[cur] == '\"':
if len(next_chunk) < 253:
next_chunk += '\\\"'
else:
break
else:
next_chunk += all_data[cur]
cur += 1
next_chunk += '\"'
if len(next_chunk) > 255:
raise Exception('Bug: next chunk is too long.')
chunks.append(next_chunk)
# Wrap the whole record in single quotes to make sure all strings
# are associated with the same TXT record (to make it one bash token for
# gcloud)
return '\'%s\'' % ' '.join(chunks)
# Convert DNS records from their "within a test group" format
# of the yaml file to an easier form for the templates to use.
def _gcloud_uploadable_form(test_cases, common_zone_name):
out = []
for group in test_cases:
if group['record_to_resolve'] in _TARGET_RECORDS_TO_SKIP_AGAINST_GCE:
continue
for record_name in group['records'].keys():
r_ttl = None
all_r_data = {}
for r_data in group['records'][record_name]:
# enforce records have the same TTL only for simplicity
if r_ttl is None:
r_ttl = r_data['TTL']
assert r_ttl == r_data['TTL'], '%s and %s differ' % (r_ttl, r_data['TTL'])
r_type = r_data['type']
if all_r_data.get(r_type) is None:
all_r_data[r_type] = []
all_r_data[r_type].append(r_data['data'])
for r_type in all_r_data.keys():
for r in out:
assert r['name'] != record_name or r['type'] != r_type, 'attempt to add a duplicate record'
out.append({
'name': record_name,
'ttl': r_ttl,
'type': r_type,
'data': _data_for_type(r_type, all_r_data[r_type], common_zone_name)
})
return out
def _gce_dns_zone_id(resolver_component_data):
dns_name = resolver_component_data['resolver_tests_common_zone_name']
return dns_name.replace('.', '-') + 'zone-id'
def _resolver_test_cases(resolver_component_data, records_to_skip):
out = []
for test_case in resolver_component_data['resolver_component_tests']:
if test_case['record_to_resolve'] in records_to_skip:
continue
out.append({
'target_name': _append_zone_name(test_case['record_to_resolve'],
resolver_component_data['resolver_tests_common_zone_name']),
'expected_addrs': _build_expected_addrs_cmd_arg(test_case['expected_addrs']),
'expected_chosen_service_config': (test_case['expected_chosen_service_config'] or ''),
'expected_lb_policy': (test_case['expected_lb_policy'] or ''),
})
return out
def main():
resolver_component_data = ''
with open('test/cpp/naming/resolver_test_record_groups.yaml') as f:
resolver_component_data = yaml.load(f)
json = {
'resolver_tests_common_zone_name': resolver_component_data['resolver_tests_common_zone_name'],
'resolver_gce_integration_tests_zone_id': _gce_dns_zone_id(resolver_component_data),
'all_integration_test_records': _gcloud_uploadable_form(resolver_component_data['resolver_component_tests'],
resolver_component_data['resolver_tests_common_zone_name']),
'resolver_gce_integration_test_cases': _resolver_test_cases(resolver_component_data, _TARGET_RECORDS_TO_SKIP_AGAINST_GCE),
'resolver_component_test_cases': _resolver_test_cases(resolver_component_data, []),
'targets': [
{
'name': 'resolver_component_test' + unsecure_build_config_suffix,
'build': 'test',
'language': 'c++',
'gtest': False,
'run': False,
'src': ['test/cpp/naming/resolver_component_test.cc'],
'platforms': ['linux', 'posix', 'mac'],
'deps': [
'grpc++_test_util' + unsecure_build_config_suffix,
'grpc_test_util' + unsecure_build_config_suffix,
'gpr_test_util',
'grpc++' + unsecure_build_config_suffix,
'grpc' + unsecure_build_config_suffix,
'gpr',
'grpc++_test_config',
],
} for unsecure_build_config_suffix in ['_unsecure', '']
] + [
{
'name': 'resolver_component_tests_runner_invoker' + unsecure_build_config_suffix,
'build': 'test',
'language': 'c++',
'gtest': False,
'run': True,
'src': ['test/cpp/naming/resolver_component_tests_runner_invoker.cc'],
'platforms': ['linux', 'posix', 'mac'],
'deps': [
'grpc++_test_util',
'grpc_test_util',
'gpr_test_util',
'grpc++',
'grpc',
'gpr',
'grpc++_test_config',
],
'args': [
'--test_bin_name=resolver_component_test%s' % unsecure_build_config_suffix,
'--running_under_bazel=false',
],
} for unsecure_build_config_suffix in ['_unsecure', '']
]
}
print(yaml.dump(json))
if __name__ == '__main__':
main()
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