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Commit 9823b127 authored by Tatsuhiro Tsujikawa's avatar Tatsuhiro Tsujikawa
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Update README.rst

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README.rst
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......@@ -16,7 +16,6 @@ Currently, the library lacks the following features:
* Header continuation
* ALPN: instead, NPN is used
* HTTP Upgrade dance
Requirements
------------
......@@ -105,8 +104,8 @@ nghttp - client
+++++++++++++++
``nghttp`` is HTTP-default04/2.0 client. It can connect to the
HTTP/2.0 server with prior knowledge (without HTTP Upgrade) and NPN in
TLS extension.
HTTP/2.0 server with prior knowledge, HTTP Upgrade and NPN TLS
extension.
By default, it uses SSL/TLS connection. Use ``--no-tls`` option to
disable it.
......@@ -159,6 +158,56 @@ output from ``nghttp`` client::
[ 0.006] send GOAWAY frame <length=8, flags=0, stream_id=0>
(last_stream_id=0, error_code=NO_ERROR(0), opaque_data=)
The HTTP Upgrade is performed like this::
$ src/nghttp --no-tls -nvu http://localhost:3000/
[ 0.000] HTTP Upgrade request
GET / HTTP/1.1
Host: localhost:3000
Connection: Upgrade, HTTP2-Settings
Upgrade: HTTP-draft-04/2.0
HTTP2-Settings: AAAABAAAAGQAAAAHAAD__w
Accept: */*
User-Agent: nghttp2/0.1.0-DEV
[ 0.183] HTTP Upgrade response
HTTP/1.1 101 Switching Protocols
Connection: Upgrade
Upgrade: HTTP/2.0
[ 0.183] HTTP Upgrade success
[ 0.183] send SETTINGS frame <length=16, flags=0x00, stream_id=0>
(niv=2)
[4:100]
[7:65535]
[ 0.202] recv SETTINGS frame <length=16, flags=0x00, stream_id=0>
(niv=2)
[4:100]
[7:65536]
[ 0.202] recv WINDOW_UPDATE frame <length=4, flags=0x01, stream_id=0>
; END_FLOW_CONTROL
(window_size_increment=0)
[ 0.275] recv HEADERS frame <length=198, flags=0x04, stream_id=1>
; END_HEADERS
; First response header
:status: 200 OK
accept-ranges: bytes
content-length: 45
content-type: text/html
date: Sat, 03 Aug 2013 10:21:20 GMT
etag: "cf405c-2d-45adabdf282c0"
last-modified: Tue, 04 Nov 2008 10:44:03 GMT
server: Apache/2.2.22 (Debian)
vary: Accept-Encoding
via: 1.1 nghttpx
x-pad: avoid browser bug
[ 0.275] recv DATA frame (length=45, flags=0, stream_id=1)
[ 0.275] recv DATA frame (length=0, flags=1, stream_id=1)
[ 0.275] send GOAWAY frame <length=8, flags=0x00, stream_id=0>
(last_stream_id=0, error_code=NO_ERROR(0), opaque_data=)
nghttpd - server
++++++++++++++++
......@@ -168,6 +217,9 @@ multiplexes connections using non-blocking socket.
By default, it uses SSL/TLS connection. Use ``--no-tls`` option to
disable it.
``nghttpd`` only accept the HTTP/2.0 connection via NPN or direct
HTTP/2.0 connection. No HTTP Upgrade is supported.
Just like ``nghttp``, it has verbose output mode for framing
information. Here is sample output from ``nghttpd`` server::
......@@ -210,26 +262,31 @@ nghttpx - proxy
+++++++++++++++
The ``nghttpx`` is a multi-threaded reverse proxy for
HTTP-draft-04/2.0, SPDY/HTTPS. It has several operation modes:
================== ======================== ======== ======================
Mode option Frontend Backend Note
================== ======================== ======== ======================
default HTTP/2.0, SPDY, HTTPS HTTP/1.1 Reverse proxy
``--spdy`` HTTP/2.0, SPDY, HTTPS HTTP/1.1 SPDY proxy
``--spdy-bridge`` HTTP/2.0, SPDY, HTTPS HTTP/2.0 SPDY proxy
``--client`` HTTP/1.1 HTTP/2.0 1.1 <-> 2.0 conversion
``--client-proxy`` HTTP/1.1 HTTP/2.0 Forward proxy
================== ======================== ======== ======================
HTTP-draft-04/2.0, SPDY and HTTP/1.1. It has several operation modes:
================== ============================== ============== =============
Mode option Frontend Backend Note
================== ============================== ============== =============
default mode HTTP/2.0, SPDY, HTTP/1.1 (TLS) HTTP/1.1 Reverse proxy
``--spdy`` HTTP/2.0, SPDY, HTTP/1.1 (TLS) HTTP/1.1 SPDY proxy
``--spdy-bridge`` HTTP/2.0, SPDY, HTTP/1.1 (TLS) HTTP/2.0 (TLS)
``--client`` HTTP/2.0, HTTP/1.1 HTTP/2.0 (TLS)
``--client-proxy`` HTTP/2.0, HTTP/1.1 HTTP/2.0 (TLS) Forward proxy
================== ============================== ============== =============
The interesting mode at the moment is the default mode. It works like
a reverse proxy and listens HTTP-draft-04/2.0 as well as SPDY and
HTTPS and can be deployed SSL/TLS terminator for existing web server.
a reverse proxy and listens HTTP-draft-04/2.0, SPDY and HTTP/1.1 and
can be deployed SSL/TLS terminator for existing web server.
By default, it uses SSL/TLS connection for HTTP/2.0 and SPDY. Use
``--frontend-spdy--no-tls`` to disable it in frontend
connection. Likewise, use ``--backend-spdy-no-tls`` option to disable
it in backend connection.
The default mode, ``--spdy`` and ``--spdy-bridge`` modes use SSL/TLS
in the frontend connection by default. To disable SSL/TLS, use
``--frontend-no-tls`` option. If that option is used, SPDY is disabled
in the frontend and incoming HTTP/1.1 connection can be upgraded to
HTTP/2.0 through HTTP Upgrade.
The ``--spdy-bridge``, ``--client`` and ``--client-proxy`` modes use
SSL/TLS in the backend connection by deafult. To disable SSL/TLS, use
``--backend-no-tls`` option.
The ``nghttpx`` supports configuration file. See ``--conf`` option and
sample configuration file ``nghttpx.conf.sample``.
......@@ -238,23 +295,25 @@ The ``nghttpx`` is ported from ``shrpx`` in spdylay project, and it
still has SPDY color in option names. They will be fixed as the
development goes.
Without any of ``-s``, ``--spdy-bridge``, ``-p`` and ``--client``
options, ``nghttpx`` works as reverse proxy to the backend server::
In the default mode, (without any of ``--spdy``, ``--spdy-bridge``,
``--client-proxy`` and ``--client`` options), ``nghttpx`` works as
reverse proxy to the backend server::
Client <-- (HTTP/2.0, SPDY, HTTPS) --> nghttpx <-- (HTTP) --> Web Server
[reverse proxy]
Client <-- (HTTP/2.0, SPDY, HTTP/1.1) --> nghttpx <-- (HTTP/1.1) --> Web Server
[reverse proxy]
With ``-s`` option, it works as so called secure SPDY proxy::
With ``--spdy`` option, it works as so called secure proxy (aka SPDY
proxy)::
Client <-- (HTTP/2.0, SPDY, HTTPS) --> nghttpx <-- (HTTP) --> Proxy
[SPDY proxy] (e.g., Squid)
Client <-- (HTTP/2.0, SPDY, HTTP/1.1) --> nghttpx <-- (HTTP/1.1) --> Proxy
[secure proxy] (e.g., Squid)
The ``Client`` in the above is needs to be configured to use nghttpx as
secure SPDY proxy.
The ``Client`` in the above is needs to be configured to use
``nghttpx`` as secure proxy.
At the time of this writing, Chrome is the only browser which supports
secure SPDY proxy. The one way to configure Chrome to use secure SPDY
proxy is create proxy.pac script like this::
secure proxy. The one way to configure Chrome to use secure proxy is
create proxy.pac script like this::
function FindProxyForURL(url, host) {
return "HTTPS SERVERADDR:PORT";
......@@ -262,44 +321,46 @@ proxy is create proxy.pac script like this::
``SERVERADDR`` and ``PORT`` is the hostname/address and port of the
machine nghttpx is running. Please note that Chrome requires valid
certificate for secure SPDY proxy.
certificate for secure proxy.
Then run chrome with the following arguments::
$ google-chrome --proxy-pac-url=file:///path/to/proxy.pac --use-npn
With ``--spdy-bridge``, it accepts HTTP/2.0, SPDY and HTTPS
With ``--spdy-bridge``, it accepts HTTP/2.0, SPDY and HTTP/1.1
connections and communicates with backend in HTTP/2.0::
Client <-- (HTTP/2.0, SPDY, HTTPS) --> nghttpx <-- (HTTP/2.0) --> Web or HTTP/2.0 Proxy etc
[SPDY bridge] (e.g., nghttpx -s)
With ``-p`` option, it works as forward proxy and expects that the
backend is HTTP/2.0 proxy::
Client <-- (HTTP/2.0, SPDY, HTTP/1.1) --> nghttpx <-- (HTTP/2.0) --> Web or HTTP/2.0 Proxy etc
(e.g., nghttpx -s)
Client <-- (HTTP) --> nghttpx <-- (HTTP/2.0) --> HTTP/2.0 Proxy
[forward proxy] (e.g., nghttpx -s)
With ``--client-proxy`` option, it works as forward proxy and expects
that the backend is HTTP/2.0 proxy::
The ``Client`` is needs to be configured to use nghttpx as forward proxy.
Client <-- (HTTP/2.0, HTTP/1.1) --> nghttpx <-- (HTTP/2.0) --> HTTP/2.0 Proxy
[forward proxy] (e.g., nghttpx -s)
With the above configuration, one can use HTTP/1.1 client to access
and test their HTTP/2.0 servers.
The ``Client`` is needs to be configured to use nghttpx as forward
proxy. The frontend HTTP/1.1 connection can be upgraded to HTTP/2.0
through HTTP Upgrade. With the above configuration, one can use
HTTP/1.1 client to access and test their HTTP/2.0 servers.
With ``--client`` option, it works as reverse proxy and expects that
the backend is HTTP/2.0 Web server::
Client <-- (HTTP) --> nghttpx <-- (HTTP/2.0) --> Web Server
[reverse proxy]
Client <-- (HTTP/2.0, HTTP/1.1) --> nghttpx <-- (HTTP/2.0) --> Web Server
[reverse proxy]
The frontend HTTP/1.1 connection can be upgraded to HTTP/2.0
through HTTP Upgrade.
For the operation modes which talk to the backend in HTTP/2.0, the
backend connections can be tunneled though HTTP proxy. The proxy is
specified using ``--backend-http-proxy-uri`` option. The following
figure illustrates the example of ``--spdy-bridge`` and
``--backend-http-proxy-uri`` option to talk to the outside HTTP/2.0 proxy
through HTTP proxy::
For the operation modes which talk to the backend in HTTP/2.0 over
SSL/TLS, the backend connections can be tunneled though HTTP
proxy. The proxy is specified using ``--backend-http-proxy-uri``
option. The following figure illustrates the example of
``--spdy-bridge`` and ``--backend-http-proxy-uri`` option to talk to
the outside HTTP/2.0 proxy through HTTP proxy::
Client <-- (HTTP/2.0, SPDY, HTTPS) --> nghttpx <-- (HTTP/2.0) --
[SPDY bridge]
Client <-- (HTTP/2.0, SPDY, HTTP/1.1) --> nghttpx <-- (HTTP/2.0) --
--===================---> HTTP/2.0 Proxy
(HTTP proxy tunnel) (e.g., nghttpx -s)
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