From ddf5e66ac864c62d5426d96247f9156a18134597 Mon Sep 17 00:00:00 2001
From: Emile Fugulin <emilefugulin@hotmail.com>
Date: Wed, 20 Nov 2019 12:24:52 -0500
Subject: [PATCH] Remove strict check of Transfer-Encoding

---
 gunicorn/http/errors.py         | 8 --------
 gunicorn/http/message.py        | 9 ++-------
 gunicorn/workers/base.py        | 7 +------
 tests/requests/invalid/022.http | 5 -----
 tests/requests/invalid/022.py   | 5 -----
 5 files changed, 3 insertions(+), 31 deletions(-)
 delete mode 100644 tests/requests/invalid/022.http
 delete mode 100644 tests/requests/invalid/022.py

diff --git a/gunicorn/http/errors.py b/gunicorn/http/errors.py
index ea5b4826..7839ef05 100644
--- a/gunicorn/http/errors.py
+++ b/gunicorn/http/errors.py
@@ -118,11 +118,3 @@ class ForbiddenProxyRequest(ParseException):
 class InvalidSchemeHeaders(ParseException):
     def __str__(self):
         return "Contradictory scheme headers"
-
-
-class UnsupportedTransferEncoding(ParseException):
-    def __init__(self, te):
-        self.te = te
-
-    def __str__(self):
-        return "Unsupported Transfer-Encoding: %s" % self.te
diff --git a/gunicorn/http/message.py b/gunicorn/http/message.py
index 59f50d7e..e5ce4a68 100644
--- a/gunicorn/http/message.py
+++ b/gunicorn/http/message.py
@@ -12,7 +12,7 @@ from gunicorn.http.unreader import SocketUnreader
 from gunicorn.http.body import ChunkedReader, LengthReader, EOFReader, Body
 from gunicorn.http.errors import (InvalidHeader, InvalidHeaderName, NoMoreData,
     InvalidRequestLine, InvalidRequestMethod, InvalidHTTPVersion,
-    LimitRequestLine, LimitRequestHeaders, UnsupportedTransferEncoding)
+    LimitRequestLine, LimitRequestHeaders)
 from gunicorn.http.errors import InvalidProxyLine, ForbiddenProxyRequest
 from gunicorn.http.errors import InvalidSchemeHeaders
 from gunicorn.util import bytes_to_str, split_request_uri
@@ -135,13 +135,8 @@ class Message(object):
                     raise InvalidHeader("CONTENT-LENGTH", req=self)
                 content_length = value
             elif name == "TRANSFER-ENCODING":
-                normalized_value = value.lower()
-                if normalized_value == "identity":
-                    pass
-                elif normalized_value == "chunked":
+                if value.lower() == "chunked":
                     chunked = True
-                else:
-                    raise UnsupportedTransferEncoding(normalized_value)
             elif name == "SEC-WEBSOCKET-KEY1":
                 content_length = 8
 
diff --git a/gunicorn/workers/base.py b/gunicorn/workers/base.py
index 7689c61f..f95994bc 100644
--- a/gunicorn/workers/base.py
+++ b/gunicorn/workers/base.py
@@ -20,7 +20,6 @@ from gunicorn.http.errors import (
     InvalidProxyLine, InvalidRequestLine,
     InvalidRequestMethod, InvalidSchemeHeaders,
     LimitRequestHeaders, LimitRequestLine,
-    UnsupportedTransferEncoding
 )
 from gunicorn.http.wsgi import Response, default_environ
 from gunicorn.reloader import reloader_engines
@@ -207,7 +206,7 @@ class Worker(object):
                 LimitRequestLine, LimitRequestHeaders,
                 InvalidProxyLine, ForbiddenProxyRequest,
                 InvalidSchemeHeaders,
-                SSLError, UnsupportedTransferEncoding)):
+                SSLError)):
 
             status_int = 400
             reason = "Bad Request"
@@ -238,10 +237,6 @@ class Worker(object):
                 reason = "Forbidden"
                 mesg = "'%s'" % str(exc)
                 status_int = 403
-            elif isinstance(exc, UnsupportedTransferEncoding):
-                reason = "Not implemented"
-                mesg = "'%s'" % str(exc)
-                status_int = 501
 
             msg = "Invalid request from ip={ip}: {error}"
             self.log.debug(msg.format(ip=addr[0], error=str(exc)))
diff --git a/tests/requests/invalid/022.http b/tests/requests/invalid/022.http
deleted file mode 100644
index 784504be..00000000
--- a/tests/requests/invalid/022.http
+++ /dev/null
@@ -1,5 +0,0 @@
-GET /stuff/here?foo=bar HTTP/1.1\r\n
-Transfer-Encoding: chunked\r\n
-Transfer-Encoding: compress\r\n
-\r\n
-xyz
diff --git a/tests/requests/invalid/022.py b/tests/requests/invalid/022.py
deleted file mode 100644
index db5c9f38..00000000
--- a/tests/requests/invalid/022.py
+++ /dev/null
@@ -1,5 +0,0 @@
-from gunicorn.config import Config
-from gunicorn.http.errors import UnsupportedTransferEncoding
-
-cfg = Config()
-request = UnsupportedTransferEncoding