Cellular automaton.
.. -*- coding: utf-8; -*-
.. include:: HEADER.rst
=======
HTTP.
=======
.. contents::
Command line tools for HTTP protocol.
=====================================
http://daniel.haxx.se/docs/curl-vs-wget.html
Comparing curl and wget.
Recursive site download.
========================
``curl`` does not allow recursive site downloading, only ``wget`` can do this::
$ wget -r -np -nc -e robots=off -p -k http://DOMAIN/PATH
Get server response header.
===========================
::
$ wget --server-response http://example.com
$ wget -S http://example.com # short variant
$ curl --dump-header - http://example.com
$ curl -D - http://example.com
View cookies from site.
=======================
::
$ wget --save-cookies FILE -O - http://example.com >/dev/null
$ curl --cookie-jar FILE -o - http://example.com >/dev/null
$ curl -c FILE -o - http://example.com >/dev/null
Send cookies to site.
=====================
::
$ wget --load-cookies FILE http://example.com
$ curl --cookie $name=$data http://example.com
$ curl -b $name=$data http://example.com
Send specific header line.
==========================
::
$ wget --header='Accept-Charset: iso-8859-2' --header='Accept-Language: ru' http://example.com
$ curl --header 'Accept-Charset: iso-8859-2' http://example.com
$ curl -H 'Accept-Charset: iso-8859-2' http://example.com
Send POST request.
==================
Log in to the server. This can be done only once::
$ wget --save-cookies cookies.txt --post-data 'user=foo&password=bar' http://server.com/auth.php
Now grab the page or pages we care about::
$ wget --load-cookies cookies.txt -p http://server.com/interesting/article.php
Web server in Cygwin.
=====================
::
$ setup -p apache2,lighttpd,dhttp
Compressing HTTP data.
======================
Starting with HTTP/1.1, web clients can indicate support for compression::
Accept-Encoding: gzip, deflate
Web server notifies the web client of this via the Content-Encoding header in
the response::
Content-Encoding: gzip
ETags.
======
Server respond::
HTTP/1.1 200 OK
Last-Modified: Tue, 12 Dec 2006 03:03:59 GMT
ETag: "10c24bc-4ab-457e1c1f"
Content-Length: 12195
Lately client send::
GET /i/yahoo.gif HTTP/1.1
Host: us.yimg.com
If-Modified-Since: Tue, 12 Dec 2006 03:03:59 GMT
If-None-Match: "10c24bc-4ab-457e1c1f"
and get respond::
HTTP/1.1 304 Not Modified