Mercurial > hg > contenttransformer
view contenttransformer/app.py @ 21:7ad9bbc070be
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author | Jeff Hammel <k0scist@gmail.com> |
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date | Tue, 03 Nov 2020 08:20:08 -0800 |
parents | 32a05d7bb214 |
children | ee3eadc97a41 |
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import os import sys from fnmatch import fnmatch from mimetypes import guess_type from paste.fileapp import FileApp from pkg_resources import iter_entry_points from transformers import ContentTypeChanger class FileTypeTransformer(object): def __init__(self, *types, **kwargs): """types is a list of two-tuples: glob pattern (string), transformer name (string, name of entry point)""" self.types = types # arguments to the xformers self.kwargs = kwargs self.transformers = transformers() for pattern, transformer_name in self.types: if '/' in transformer_name: continue assert transformer_name in self.transformers, '%s not in transformers' % transformer_name def __call__(self, path): """this should return something that is callable with (environ, start_response) to return a response; the transformer thing""" filename = os.path.basename(path) for pattern, transformer_name in self.types: if fnmatch(filename, pattern): content_type, _ = guess_type(filename) content = file(path).read() # transform content type # XXX hack: -> refactor if '/' in transformer_name: return ContentTypeChanger(content, content_type, transformer_name) return self.transformers[transformer_name](content, content_type, **self.kwargs.get(transformer_name, {})) return FileApp(path) def transformers(): transformers = {} # XXX could cache for entry_point in iter_entry_points('content_transformers'): try: transformers[entry_point.name] = entry_point.load() except: raise # XXX return transformers