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54 | ||
55 | <H2><A NAME="SECTION0013540000000000000000"></A><A NAME="http-redirect-handler"></A> | |
56 | <BR> | |
57 | 11.5.4 HTTPRedirectHandler Objects | |
58 | </H2> | |
59 | ||
60 | <P> | |
61 | <span class="note"><b class="label">Note:</b> | |
62 | Some HTTP redirections require action from this module's client | |
63 | code. If this is the case, <tt class="exception">HTTPError</tt> is raised. See | |
64 | <a class="rfc" id='rfcref-90020' xml:id='rfcref-90020' | |
65 | href="http://www.faqs.org/rfcs/rfc2616.html">RFC 2616</a> for details of the precise meanings of the various | |
66 | redirection codes.</span> | |
67 | ||
68 | <P> | |
69 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
70 | <td><nobr><b><tt id='l2h-3271' xml:id='l2h-3271' class="method">redirect_request</tt></b>(</nobr></td> | |
71 | <td><var>req, | |
72 | fp, code, msg, hdrs</var>)</td></tr></table></dt> | |
73 | <dd> | |
74 | Return a <tt class="class">Request</tt> or <code>None</code> in response to a redirect. | |
75 | This is called by the default implementations of the | |
76 | <tt class="method">http_error_30*()</tt> methods when a redirection is received from | |
77 | the server. If a redirection should take place, return a new | |
78 | <tt class="class">Request</tt> to allow <tt class="method">http_error_30*()</tt> to perform the | |
79 | redirect. Otherwise, raise <tt class="exception">HTTPError</tt> if no other handler | |
80 | should try to handle this URL, or return <code>None</code> if you can't but | |
81 | another handler might. | |
82 | ||
83 | <P> | |
84 | <div class="note"><b class="label">Note:</b> | |
85 | The default implementation of this method does not strictly | |
86 | follow <a class="rfc" id='rfcref-90027' xml:id='rfcref-90027' | |
87 | href="http://www.faqs.org/rfcs/rfc2616.html">RFC 2616</a>, which says that 301 and 302 responses to <code>POST</code> | |
88 | requests must not be automatically redirected without confirmation by | |
89 | the user. In reality, browsers do allow automatic redirection of | |
90 | these responses, changing the POST to a <code>GET</code>, and the default | |
91 | implementation reproduces this behavior. | |
92 | </div> | |
93 | </dl> | |
94 | ||
95 | <P> | |
96 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
97 | <td><nobr><b><tt id='l2h-3272' xml:id='l2h-3272' class="method">http_error_301</tt></b>(</nobr></td> | |
98 | <td><var>req, | |
99 | fp, code, msg, hdrs</var>)</td></tr></table></dt> | |
100 | <dd> | |
101 | Redirect to the <code>Location:</code> URL. This method is called by | |
102 | the parent <tt class="class">OpenerDirector</tt> when getting an HTTP | |
103 | `moved permanently' response. | |
104 | </dl> | |
105 | ||
106 | <P> | |
107 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
108 | <td><nobr><b><tt id='l2h-3273' xml:id='l2h-3273' class="method">http_error_302</tt></b>(</nobr></td> | |
109 | <td><var>req, | |
110 | fp, code, msg, hdrs</var>)</td></tr></table></dt> | |
111 | <dd> | |
112 | The same as <tt class="method">http_error_301()</tt>, but called for the | |
113 | `found' response. | |
114 | </dl> | |
115 | ||
116 | <P> | |
117 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
118 | <td><nobr><b><tt id='l2h-3274' xml:id='l2h-3274' class="method">http_error_303</tt></b>(</nobr></td> | |
119 | <td><var>req, | |
120 | fp, code, msg, hdrs</var>)</td></tr></table></dt> | |
121 | <dd> | |
122 | The same as <tt class="method">http_error_301()</tt>, but called for the | |
123 | `see other' response. | |
124 | </dl> | |
125 | ||
126 | <P> | |
127 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
128 | <td><nobr><b><tt id='l2h-3275' xml:id='l2h-3275' class="method">http_error_307</tt></b>(</nobr></td> | |
129 | <td><var>req, | |
130 | fp, code, msg, hdrs</var>)</td></tr></table></dt> | |
131 | <dd> | |
132 | The same as <tt class="method">http_error_301()</tt>, but called for the | |
133 | `temporary redirect' response. | |
134 | </dl> | |
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