Source

CherryPy / cherrypy / lib / httptools.py

"""
Copyright (c) 2004, CherryPy Team (team@cherrypy.org)
All rights reserved.

Redistribution and use in source and binary forms, with or without modification, 
are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice, 
      this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice, 
      this list of conditions and the following disclaimer in the documentation 
      and/or other materials provided with the distribution.
    * Neither the name of the CherryPy Team nor the names of its contributors 
      may be used to endorse or promote products derived from this software 
      without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""

"""
Just a few convenient functions
"""

from cherrypy import cpg

def canonicalizeUrl(url):
    """ Canonicalize a URL. The URL might be relative, absolute or canonical """
    if not url.startswith('http://') and not url.startswith('https://'):
        # If url is not canonical, we must make it canonical
        if url[0] == '/':
            # URL was absolute: we just add the request.base in front of it
            url = cpg.request.base + url
        else:
            # URL was relative
            if cpg.request.browserUrl == cpg.request.base:
                # browserUrl is request.base
                url = cpg.request.base + '/' + url
            else:
                i = cpg.request.browserUrl.rfind('/')
                url = cpg.request.browserUrl[:i+1] + url
    return url

def redirect(url):
    """ Sends a redirect to the browser (after canonicalizing the URL) """
    cpg.response.headerMap['Status'] = 302
    cpg.response.headerMap['Location'] = canonicalizeUrl(url)
    return ""
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