Source code for lb.blocks.http
# Copyright 2017 The Lambda-blocks developers. See AUTHORS for details.
#
# 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.
"""
This module contains blocks for performing HTTP operations.
"""
import urllib.request
from lb.registry import block
from lb.types import ReturnType
from lb.utils import ReturnEntry
[docs]@block(engine='http')
def read_http(url: str='', encoding: str='utf8'):
"""Performs an HTTP GET request, and returns its result.
:param str url: The requested URL.
:param str encoding: How the result should be decoded.
:output str result: The content returned by the request.
"""
def inner() -> ReturnType[str]:
with urllib.request.urlopen(url) as response:
data = response.read().decode(encoding)
return ReturnEntry(result=data)
return inner