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✏️ Editing: rewrite.py

# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

#
from twisted.web import resource

class RewriterResource(resource.Resource):
    def __init__(self, orig, *rewriteRules):
        resource.Resource.__init__(self)
        self.resource = orig
        self.rewriteRules = list(rewriteRules)

def _rewrite(self, request):
        for rewriteRule in self.rewriteRules:
            rewriteRule(request)

def getChild(self, path, request):
        request.postpath.insert(0, path)
        request.prepath.pop()
        self._rewrite(request)
        path = request.postpath.pop(0)
        request.prepath.append(path)
        return self.resource.getChildWithDefault(path, request)

def render(self, request):
        self._rewrite(request)
        return self.resource.render(request)

def tildeToUsers(request):
    if request.postpath and request.postpath[0][:1] == "~":
        request.postpath[:1] = ["users", request.postpath[0][1:]]
        request.path = "/" + "/".join(request.prepath + request.postpath)

def alias(aliasPath, sourcePath):
    """
    I am not a very good aliaser. But I'm the best I can be. If I'm
    aliasing to a Resource that generates links, and it uses any parts
    of request.prepath to do so, the links will not be relative to the
    aliased path, but rather to the aliased-to path. That I can't
    alias static.File directory listings that nicely. However, I can
    still be useful, as many resources will play nice.
    """
    sourcePath = sourcePath.split("/")
    aliasPath = aliasPath.split("/")

def rewriter(request):
        if request.postpath[: len(aliasPath)] == aliasPath:
            after = request.postpath[len(aliasPath) :]
            request.postpath = sourcePath + after
            request.path = "/" + "/".join(request.prepath + request.postpath)

return rewriter

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