http.rst
author Oleksandr Gavenko <gavenkoa@gmail.com>
Mon, 22 Feb 2016 12:41:52 +0200
changeset 1903 901e7394849f
parent 1346 a2fbf50a43f4
child 1905 fba288d59662
permissions -rw-r--r--
Decrease intent to increase space usage on mobile.
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.. -*- coding: utf-8; -*-
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.. include:: HEADER.rst
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=======
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 HTTP.
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=======
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.. contents::
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Command line tools for HTTP protocol.
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=====================================
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  http://daniel.haxx.se/docs/curl-vs-wget.html
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                Comparing curl and wget.
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Recursive site download.
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========================
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``curl`` does not allow recursive site downloading, only ``wget`` can do this::
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  $ wget -r -np -nc -e robots=off -p -k http://DOMAIN/PATH
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Get server response header.
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===========================
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::
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  $ wget --server-response http://example.com
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  $ wget -S http://example.com    # short variant
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  $ curl --dump-header - http://example.com
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  $ curl -D - http://example.com
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View cookies from site.
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=======================
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::
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  $ wget --save-cookies FILE -O -  http://example.com  >/dev/null
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  $ curl --cookie-jar FILE -o - http://example.com  >/dev/null
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  $ curl -c FILE -o - http://example.com  >/dev/null
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Send cookies to site.
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=====================
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::
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  $ wget --load-cookies FILE  http://example.com
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  $ curl --cookie $name=$data  http://example.com
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  $ curl -b $name=$data  http://example.com
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Send specific header line.
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==========================
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::
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  $ wget --header='Accept-Charset: iso-8859-2' --header='Accept-Language: ru' http://example.com
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  $ curl --header 'Accept-Charset: iso-8859-2' http://example.com
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  $ curl -H 'Accept-Charset: iso-8859-2' http://example.com
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Send POST request.
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==================
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Log in to the server. This can be done only once::
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  $ wget --save-cookies cookies.txt --post-data 'user=foo&password=bar' http://server.com/auth.php
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Now grab the page or pages we care about::
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  $ wget --load-cookies cookies.txt -p http://server.com/interesting/article.php
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Web server in Cygwin.
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=====================
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::
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  $ setup -p apache2,lighttpd,dhttp
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Compressing HTTP data.
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======================
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Starting with HTTP/1.1, web clients can indicate support for compression::
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  Accept-Encoding: gzip, deflate
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Web server notifies the web client of this via the Content-Encoding header in
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the response::
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  Content-Encoding: gzip
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ETags.
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======
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Server respond::
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  HTTP/1.1 200 OK
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  Last-Modified: Tue, 12 Dec 2006 03:03:59 GMT
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  ETag: "10c24bc-4ab-457e1c1f"
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  Content-Length: 12195
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Lately client send::
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  GET /i/yahoo.gif HTTP/1.1
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  Host: us.yimg.com
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  If-Modified-Since: Tue, 12 Dec 2006 03:03:59 GMT
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  If-None-Match: "10c24bc-4ab-457e1c1f"
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and get respond::
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  HTTP/1.1 304 Not Modified
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