net/http: Transfer-Encoding header is missing in headers (http.Request) #27061
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Python web server code #!/usr/bin/env python
"""
Very simple HTTP server in python.
Usage::
./dummy-web-server.py [<port>]
Send a GET request::
curl http://localhost
Send a HEAD request::
curl -I http://localhost
Send a POST request::
curl -d "foo=bar&bin=baz" http://localhost
"""
from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
import SocketServer
class S(BaseHTTPRequestHandler):
def _set_headers(self):
self.send_response(200)
self.send_header('Content-type', 'text/html')
self.end_headers()
def do_GET(self):
self._set_headers()
self.wfile.write("<html><body><h1>hi!</h1></body></html>")
def do_HEAD(self):
self._set_headers()
def do_PUT(self):
request_path = self.path
print("\n----- Request Start ----->\n")
print(request_path)
request_headers = self.headers
print(request_headers)
print("<----- Request End -----\n")
self.send_response(200)
def run(server_class=HTTPServer, handler_class=S, port=9777):
server_address = ('', port)
httpd = server_class(server_address, handler_class)
print 'Starting httpd...'
httpd.serve_forever()
if __name__ == "__main__":
from sys import argv
if len(argv) == 2:
run(port=int(argv[1]))
else:
run() |
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Transfer-Encoding is a hop by hop header. https://tools.ietf.org/html/rfc2616#section-13.5.1 |
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/cc @bradfitz |
agnivade
changed the title
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See the http.Request docs. (on phone, so no link) |
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@bradfitz - Do you mean Transfer-Encoding is also included in "certain headers" ? https://golang.org/pkg/net/http/#Request
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Transfer-Encoding header is missing when http.Request.Header is printed/accessed.
What version of Go are you using (
go version)?go version go1.10.3 darwin/amd64
Does this issue reproduce with the latest release?
Yes
What operating system and processor architecture are you using (
go env)?GOARCH="amd64"
GOBIN="/Users/user/go/bin"
GOCACHE="/Users/sumalepa/Library/Caches/go-build"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="linux"
GOPATH="/Users/user/go"
GORACE=""
GOROOT="/usr/local/Cellar/go/1.10.3/libexec"
GOTMPDIR=""
GOTOOLDIR="/usr/local/Cellar/go/1.10.3/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="0"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/76/trlnwqwj0bs5003x850kzpg00000gn/T/go-build494326801=/tmp/go-build -gno-record-gcc-switches"
What did you do?
We have a nginx server that routes the requests to go based http server.
https://play.golang.org/p/EA1vcoiFi_J
What did you expect to see?
We expected to see the header Transfer-Encoding
What did you see instead?
Missing header Transfer-Encoding
Few Details:
Http-Client (User-Agent [Go-http-client/1.1]) -> Nginx -> Http server (Go based server)
Sent a PUT request from client with chunked encoding header to nginx in turn nginx sends the request to http server.
I was able to see the headers in the pcap dumps captured at client, nginx. But on go http server I didn't the header.
But in the go http server output I didn't see the Transfer-Encoding header.
As a part of debug process I replaces go http server with python http server. I was able to see the Transfer-Encoding header on http python server.
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