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https://issues.apache.org/jira/browse/THRIFT-4621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16591623#comment-16591623
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ASF GitHub Bot commented on THRIFT-4621:
----------------------------------------
nsuke commented on a change in pull request #1583: THRIFT-4621 Add THeader for
Python
URL: https://github.com/apache/thrift/pull/1583#discussion_r212510529
##########
File path: lib/py/src/transport/THeaderTransport.py
##########
@@ -0,0 +1,365 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you 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.
+#
+
+import struct
+import zlib
+
+from thrift.compat import BufferIO, binary_to_str, str_to_binary, byte_index
+from thrift.protocol.TBinaryProtocol import TBinaryProtocol
+from thrift.protocol.TCompactProtocol import TCompactProtocol, readVarint,
writeVarint
+from thrift.Thrift import TApplicationException
+from thrift.transport.TTransport import (
+ CReadableTransport,
+ TMemoryBuffer,
+ TTransportBase,
+ TTransportException,
+)
+
+
+U16 = struct.Struct("!H")
+I32 = struct.Struct("!i")
+HEADER_MAGIC = 0x0FFF
+
+
+class THeaderClientType(object):
+ HEADERS = 0x00
+
+ FRAMED_BINARY = 0x01
+ UNFRAMED_BINARY = 0x02
+
+ FRAMED_COMPACT = 0x03
+ UNFRAMED_COMPACT = 0x04
+
+
+class THeaderSubprotocolID(object):
+ BINARY = 0x00
+ COMPACT = 0x02
+
+
+class TInfoHeaderType(object):
+ KEY_VALUE = 0x01
+
+
+class THeaderTransformID(object):
+ ZLIB = 0x01
+
+
+READ_TRANSFORMS_BY_ID = {
+ THeaderTransformID.ZLIB: zlib.decompress,
+}
+
+
+WRITE_TRANSFORMS_BY_ID = {
+ THeaderTransformID.ZLIB: zlib.compress,
+}
+
+
+def readSize(trans):
+ size = readVarint(trans)
+ if size < 0:
+ raise TTransportException(
+ TTransportException.NEGATIVE_SIZE,
+ "Negative length"
+ )
+ return size
+
+
+def readString(trans):
+ length = readSize(trans)
+ return trans.read(length)
+
+
+def writeString(trans, value):
+ writeVarint(trans, len(value))
+ trans.write(value)
+
+
+class THeaderTransport(TTransportBase, CReadableTransport):
+ def __init__(self, transport, allowed_client_types=None):
+ self._transport = transport
+ self._client_type = THeaderClientType.HEADERS
+
+ if not allowed_client_types:
+ allowed_client_types = [THeaderClientType.HEADERS]
Review comment:
maybe just make it default argument.
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> THeader for Python
> ------------------
>
> Key: THRIFT-4621
> URL: https://issues.apache.org/jira/browse/THRIFT-4621
> Project: Thrift
> Issue Type: New Feature
> Components: Python - Library
> Reporter: Neil Williams
> Priority: Minor
>
> I'm interested in porting THeader for the Python library. If that sounds OK,
> I'll have a PR ready in not too long.
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