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Amendments to the urllib2 docs, written for GHOP by Thomas Lamb.

This commit is contained in:
Georg Brandl 2008-02-02 09:56:20 +00:00
parent fe424f754f
commit 586a57a43c
1 changed files with 30 additions and 9 deletions
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37
Doc/library/urllib2.rst
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@ -33,10 +33,12 @@ The :mod:`urllib2` module defines the following functions:
This function returns a file-like object with two additional methods: This function returns a file-like object with two additional methods:
* :meth:`geturl` --- return the URL of the resource retrieved * :meth:`geturl` --- return the URL of the resource retrieved, commonly used to
determine if a redirect was followed
* :meth:`info` --- return the meta-information of the page, as a dictionary-like * :meth:`info` --- return the meta-information of the page, such as headers, in
object the form of an ``httplib.HTTPMessage`` instance
(see `Quick Reference to HTTP Headers <http://www.cs.tut.fi/~jkorpela/http.html>`_)
Raises :exc:`URLError` on errors. Raises :exc:`URLError` on errors.
@ -84,13 +86,27 @@ The following exceptions are raised as appropriate:
The handlers raise this exception (or derived exceptions) when they run into a The handlers raise this exception (or derived exceptions) when they run into a
problem. It is a subclass of :exc:`IOError`. problem. It is a subclass of :exc:`IOError`.
.. attribute:: reason
The reason for this error. It can be a message string or another exception
instance (:exc:`socket.error` for remote URLs, :exc:`OSError` for local
URLs).
.. exception:: HTTPError .. exception:: HTTPError
A subclass of :exc:`URLError`, it can also function as a non-exceptional Though being an exception (a subclass of :exc:`URLError`), an :exc:`HTTPError`
file-like return value (the same thing that :func:`urlopen` returns). This can also function as a non-exceptional file-like return value (the same thing
is useful when handling exotic HTTP errors, such as requests for that :func:`urlopen` returns). This is useful when handling exotic HTTP
authentication. errors, such as requests for authentication.
.. attribute:: code
An HTTP status code as defined in `RFC 2616 <http://www.faqs.org/rfcs/rfc2616.html>`_.
This numeric value corresponds to a value found in the dictionary of
codes as found in :attr:`BaseHTTPServer.BaseHTTPRequestHandler.responses`.
The following classes are provided: The following classes are provided:
@ -110,7 +126,12 @@ The following classes are provided:
returns a string in this format. returns a string in this format.
*headers* should be a dictionary, and will be treated as if :meth:`add_header` *headers* should be a dictionary, and will be treated as if :meth:`add_header`
was called with each key and value as arguments. was called with each key and value as arguments. This is often used to "spoof"
the ``User-Agent`` header, which is used by a browser to identify itself --
some HTTP servers only allow requests coming from common browsers as opposed
to scripts. For example, Mozilla Firefox may identify itself as ``"Mozilla/5.0
(X11; U; Linux i686) Gecko/20071127 Firefox/2.0.0.11"``, while :mod:`urllib2`'s
default user agent string is ``"Python-urllib/2.6"`` (on Python 2.6).
The final two arguments are only of interest for correct handling of third-party The final two arguments are only of interest for correct handling of third-party
HTTP cookies: HTTP cookies: