mirror of https://github.com/python/cpython
Applying proposed patch for bug #474583, optional support for
non-standard but common types. Including Martin's suggestion to add rejected non-standard types from patch #438790. Specifically, guess_type(), guess_extension(): Both the functions and the methods grow an optional "strict" flag, defaulting to true, which determines whether to recognize non-standard, but commonly found types or not. Also, I sorted, reformatted, and culled duplicates from the big types_map dictionary. Note that there are a few non-equivalent duplicates (e.g. .cdf and .xls) for which the first will just get thrown away. I didn't remove those though. Finally, use of the module as a script as grown the -l and -e options to toggle strictness and to do guess_extension(), respectively. Doc and unittest updates too.
This commit is contained in:
Barry Warsaw
parent
9cd0efcee9
commit
107771a228
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@ -8,10 +8,10 @@
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\indexii{MIME}{content type}
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The \module{mimetypes} converts between a filename or URL and the MIME
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type associated with the filename extension. Conversions are provided
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from filename to MIME type and from MIME type to filename extension;
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encodings are not supported for the later conversion.
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The \module{mimetypes} module converts between a filename or URL and
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the MIME type associated with the filename extension. Conversions are
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provided from filename to MIME type and from MIME type to filename
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extension; encodings are not supported for the latter conversion.
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The module provides one class and a number of convenience functions.
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The functions are the normal interface to this module, but some
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@ -23,22 +23,31 @@ module. If the module has not been initialized, they will call
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sets up.
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\begin{funcdesc}{guess_type}{filename}
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\begin{funcdesc}{guess_type}{filename\optional{, strict}}
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Guess the type of a file based on its filename or URL, given by
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\var{filename}. The return value is a tuple \code{(\var{type},
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\var{encoding})} where \var{type} is \code{None} if the type can't be
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guessed (no or unknown suffix) or a string of the form
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guessed (missing or unknown suffix) or a string of the form
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\code{'\var{type}/\var{subtype}'}, usable for a MIME
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\mailheader{content-type} header\indexii{MIME}{headers}; and encoding
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is \code{None} for no encoding or the name of the program used to
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encode (e.g. \program{compress} or \program{gzip}). The encoding is
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suitable for use as a \mailheader{Content-Encoding} header, \emph{not}
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as a \mailheader{Content-Transfer-Encoding} header. The mappings are
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table driven. Encoding suffixes are case sensitive; type suffixes are
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first tried case sensitive, then case insensitive.
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\mailheader{content-type} header\indexii{MIME}{headers}.
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\var{encoding} is \code{None} for no encoding or the name of the
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program used to encode (e.g. \program{compress} or \program{gzip}).
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The encoding is suitable for use as a \mailheader{Content-Encoding}
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header, \emph{not} as a \mailheader{Content-Transfer-Encoding} header.
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The mappings are table driven. Encoding suffixes are case sensitive;
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type suffixes are first tried case sensitively, then case
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insensitively.
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Optional \var{strict} is a flag specifying whether the list of known
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MIME types is limited to only the official types \ulink{registered
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with IANA}{http://www.isi.edu/in-notes/iana/assignments/media-types}
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are recognized. When \var{strict} is true (the default), only the
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IANA types are supported; when \var{strict} is false, some additional
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non-standard but commonly used MIME types are also recognized.
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\end{funcdesc}
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\begin{funcdesc}{guess_extension}{type}
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\begin{funcdesc}{guess_extension}{type\optional{, strict}}
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Guess the extension for a file based on its MIME type, given by
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\var{type}.
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The return value is a string giving a filename extension, including the
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@ -46,6 +55,9 @@ leading dot (\character{.}). The extension is not guaranteed to have been
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associated with any particular data stream, but would be mapped to the
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MIME type \var{type} by \function{guess_type()}. If no extension can
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be guessed for \var{type}, \code{None} is returned.
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Optional \var{strict} has the same meaning as with the
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\function{guess_type()} function.
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\end{funcdesc}
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@ -98,6 +110,11 @@ Dictionary mapping filename extensions to encoding types.
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Dictionary mapping filename extensions to MIME types.
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\end{datadesc}
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\begin{datadesc}{common_types}
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Dictionary mapping filename extensions to non-standard, but commonly
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found MIME types.
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\end{datadesc}
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The \class{MimeTypes} class may be useful for applications which may
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want more than one MIME-type database:
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@ -144,12 +161,18 @@ that of the \refmodule{mimetypes} module.
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module.
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\end{datadesc}
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\begin{methoddesc}{guess_extension}{type}
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\begin{datadesc}{common_types}
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Dictionary mapping filename extensions to non-standard, but commonly
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found MIME types. This is initially a copy of the global
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\code{common_types} defined in the module.
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\end{datadesc}
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\begin{methoddesc}{guess_extension}{type\optional{, strict}}
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Similar to the \function{guess_extension()} function, using the
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tables stored as part of the object.
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\end{methoddesc}
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\begin{methoddesc}{guess_type}{url}
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\begin{methoddesc}{guess_type}{url\optional{, strict}}
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Similar to the \function{guess_type()} function, using the tables
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stored as part of the object.
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\end{methoddesc}
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344
Lib/mimetypes.py
344
Lib/mimetypes.py
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@ -2,9 +2,9 @@
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This module defines two useful functions:
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guess_type(url) -- guess the MIME type and encoding of a URL.
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guess_type(url, strict=1) -- guess the MIME type and encoding of a URL.
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guess_extension(type) -- guess the extension for a given MIME type.
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guess_extension(type, strict=1) -- guess the extension for a given MIME type.
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It also contains the following, for tuning the behavior:
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@ -21,6 +21,16 @@ Functions:
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init([files]) -- parse a list of files, default knownfiles
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read_mime_types(file) -- parse one file, return a dictionary or None
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When run as a script, the following command line options are recognized:
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Usage: mimetypes.py [options] type
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Options:
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--help / -h -- print this message and exit
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--lenient / -l -- additionally search of some common, but non-standard
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types.
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--extension / -e -- guess extension instead of type
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More than one type argument may be given.
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"""
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import os
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@ -53,10 +63,11 @@ class MimeTypes:
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self.encodings_map = encodings_map.copy()
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self.suffix_map = suffix_map.copy()
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self.types_map = types_map.copy()
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self.common_types = common_types.copy()
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for name in filenames:
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self.read(name)
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def guess_type(self, url):
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def guess_type(self, url, strict=1):
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"""Guess the type of a file based on its URL.
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Return value is a tuple (type, encoding) where type is None if
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@ -71,6 +82,9 @@ class MimeTypes:
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The suffixes .tgz, .taz and .tz (case sensitive!) are all
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mapped to '.tar.gz'. (This is table-driven too, using the
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dictionary suffix_map.)
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Optional `strict' argument when false adds a bunch of commonly found,
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but non-standard types.
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"""
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scheme, url = urllib.splittype(url)
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if scheme == 'data':
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@ -101,14 +115,21 @@ class MimeTypes:
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else:
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encoding = None
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types_map = self.types_map
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common_types = self.common_types
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if types_map.has_key(ext):
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return types_map[ext], encoding
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elif types_map.has_key(ext.lower()):
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return types_map[ext.lower()], encoding
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elif strict:
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return None, encoding
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elif common_types.has_key(ext):
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return common_types[ext], encoding
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elif common_types.has_key(ext.lower()):
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return common_types[ext.lower()], encoding
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else:
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return None, encoding
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def guess_extension(self, type):
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def guess_extension(self, type, strict=1):
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"""Guess the extension for a file based on its MIME type.
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Return value is a string giving a filename extension,
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@ -117,11 +138,18 @@ class MimeTypes:
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stream, but would be mapped to the MIME type `type' by
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guess_type(). If no extension can be guessed for `type', None
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is returned.
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Optional `strict' argument when false adds a bunch of commonly found,
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but non-standard types.
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"""
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type = type.lower()
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for ext, stype in self.types_map.items():
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if type == stype:
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return ext
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if not strict:
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for ext, stype in common_types.items():
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if type == stype:
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return ext
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return None
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def read(self, filename):
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@ -149,7 +177,7 @@ class MimeTypes:
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map['.' + suff] = type
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def guess_type(url):
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def guess_type(url, strict=1):
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"""Guess the type of a file based on its URL.
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Return value is a tuple (type, encoding) where type is None if the
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@ -163,12 +191,15 @@ def guess_type(url):
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The suffixes .tgz, .taz and .tz (case sensitive!) are all mapped
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to ".tar.gz". (This is table-driven too, using the dictionary
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suffix_map).
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Optional `strict' argument when false adds a bunch of commonly found, but
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non-standard types.
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"""
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init()
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return guess_type(url)
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return guess_type(url, strict)
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def guess_extension(type):
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def guess_extension(type, strict=1):
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"""Guess the extension for a file based on its MIME type.
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Return value is a string giving a filename extension, including the
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@ -176,14 +207,17 @@ def guess_extension(type):
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associated with any particular data stream, but would be mapped to the
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MIME type `type' by guess_type(). If no extension can be guessed for
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`type', None is returned.
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Optional `strict' argument when false adds a bunch of commonly found,
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but non-standard types.
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"""
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init()
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return guess_extension(type)
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return guess_extension(type, strict)
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def init(files=None):
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global guess_extension, guess_type
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global suffix_map, types_map, encodings_map
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global suffix_map, types_map, encodings_map, common_types
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global inited
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inited = 1
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db = MimeTypes()
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@ -197,6 +231,7 @@ def init(files=None):
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types_map = db.types_map
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guess_extension = db.guess_extension
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guess_type = db.guess_type
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common_types = db.common_types
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def read_mime_types(file):
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@ -223,133 +258,178 @@ encodings_map = {
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# Before adding new types, make sure they are either registered with IANA, at
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# http://www.isi.edu/in-notes/iana/assignments/media-types
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# or extensions, i.e. using the x- prefix
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# If you add to these, please keep them sorted!
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types_map = {
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'.a': 'application/octet-stream',
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'.ai': 'application/postscript',
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'.aif': 'audio/x-aiff',
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'.aifc': 'audio/x-aiff',
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'.aiff': 'audio/x-aiff',
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'.au': 'audio/basic',
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'.avi': 'video/x-msvideo',
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'.bcpio': 'application/x-bcpio',
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'.bin': 'application/octet-stream',
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'.bmp': 'image/x-ms-bmp',
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'.cdf': 'application/x-netcdf',
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'.cpio': 'application/x-cpio',
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'.csh': 'application/x-csh',
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'.css': 'text/css',
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'.dll': 'application/octet-stream',
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'.doc': 'application/msword',
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'.dvi': 'application/x-dvi',
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'.exe': 'application/octet-stream',
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'.eps': 'application/postscript',
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'.etx': 'text/x-setext',
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'.gif': 'image/gif',
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'.gtar': 'application/x-gtar',
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'.hdf': 'application/x-hdf',
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'.htm': 'text/html',
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'.html': 'text/html',
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'.ief': 'image/ief',
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'.jpe': 'image/jpeg',
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'.jpeg': 'image/jpeg',
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'.jpg': 'image/jpeg',
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'.js': 'application/x-javascript',
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'.latex': 'application/x-latex',
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'.man': 'application/x-troff-man',
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'.me': 'application/x-troff-me',
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'.mif': 'application/x-mif',
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'.mov': 'video/quicktime',
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'.movie': 'video/x-sgi-movie',
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'.mp2': 'audio/mpeg',
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'.mp3': 'audio/mpeg',
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'.mpe': 'video/mpeg',
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'.mpeg': 'video/mpeg',
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'.mpg': 'video/mpeg',
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'.ms': 'application/x-troff-ms',
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'.nc': 'application/x-netcdf',
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'.o': 'application/octet-stream',
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'.obj': 'application/octet-stream',
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'.oda': 'application/oda',
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'.pbm': 'image/x-portable-bitmap',
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'.pdf': 'application/pdf',
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'.pgm': 'image/x-portable-graymap',
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'.pnm': 'image/x-portable-anymap',
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'.png': 'image/png',
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'.ppm': 'image/x-portable-pixmap',
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'.ps': 'application/postscript',
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'.py': 'text/x-python',
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'.pyc': 'application/x-python-code',
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'.pyo': 'application/x-python-code',
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'.qt': 'video/quicktime',
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'.ras': 'image/x-cmu-raster',
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'.rgb': 'image/x-rgb',
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'.rdf': 'application/xml',
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'.roff': 'application/x-troff',
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'.rtx': 'text/richtext',
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'.sgm': 'text/x-sgml',
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'.sgml': 'text/x-sgml',
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'.sh': 'application/x-sh',
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'.shar': 'application/x-shar',
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'.snd': 'audio/basic',
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'.so': 'application/octet-stream',
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'.src': 'application/x-wais-source',
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'.a' : 'application/octet-stream',
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'.ai' : 'application/postscript',
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'.aif' : 'audio/x-aiff',
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'.aifc' : 'audio/x-aiff',
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'.aiff' : 'audio/x-aiff',
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'.au' : 'audio/basic',
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'.avi' : 'video/x-msvideo',
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'.bat' : 'text/plain',
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'.bcpio' : 'application/x-bcpio',
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'.bin' : 'application/octet-stream',
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'.bmp' : 'image/x-ms-bmp',
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'.c' : 'text/plain',
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# Duplicates :(
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'.cdf' : 'application/x-cdf',
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'.cdf' : 'application/x-netcdf',
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'.cpio' : 'application/x-cpio',
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'.csh' : 'application/x-csh',
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'.css' : 'text/css',
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'.dll' : 'application/octet-stream',
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'.doc' : 'application/msword',
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'.dot' : 'application/msword',
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'.dvi' : 'application/x-dvi',
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'.eml' : 'message/rfc822',
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'.eps' : 'application/postscript',
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'.etx' : 'text/x-setext',
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'.exe' : 'application/octet-stream',
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'.gif' : 'image/gif',
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'.gtar' : 'application/x-gtar',
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'.h' : 'text/plain',
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'.hdf' : 'application/x-hdf',
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'.htm' : 'text/html',
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'.html' : 'text/html',
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'.ief' : 'image/ief',
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'.jpe' : 'image/jpeg',
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'.jpeg' : 'image/jpeg',
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'.jpg' : 'image/jpeg',
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'.js' : 'application/x-javascript',
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'.ksh' : 'text/plain',
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'.latex' : 'application/x-latex',
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'.m1v' : 'video/mpeg',
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'.man' : 'application/x-troff-man',
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'.me' : 'application/x-troff-me',
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'.mht' : 'message/rfc822',
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'.mhtml' : 'message/rfc822',
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'.mif' : 'application/x-mif',
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'.mov' : 'video/quicktime',
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'.movie' : 'video/x-sgi-movie',
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'.mp2' : 'audio/mpeg',
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'.mp3' : 'audio/mpeg',
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'.mpa' : 'video/mpeg',
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'.mpe' : 'video/mpeg',
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'.mpeg' : 'video/mpeg',
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'.mpg' : 'video/mpeg',
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'.ms' : 'application/x-troff-ms',
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'.nc' : 'application/x-netcdf',
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'.nws' : 'message/rfc822',
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'.o' : 'application/octet-stream',
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'.obj' : 'application/octet-stream',
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'.oda' : 'application/oda',
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'.p12' : 'application/x-pkcs12',
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'.p7c' : 'application/pkcs7-mime',
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'.pbm' : 'image/x-portable-bitmap',
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'.pdf' : 'application/pdf',
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'.pfx' : 'application/x-pkcs12',
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'.pgm' : 'image/x-portable-graymap',
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'.pl' : 'text/plain',
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'.png' : 'image/png',
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'.pnm' : 'image/x-portable-anymap',
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'.pot' : 'application/vnd.ms-powerpoint',
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'.ppa' : 'application/vnd.ms-powerpoint',
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'.ppm' : 'image/x-portable-pixmap',
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'.pps' : 'application/vnd.ms-powerpoint',
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'.ppt' : 'application/vnd.ms-powerpoint',
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'.ps' : 'application/postscript',
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'.pwz' : 'application/vnd.ms-powerpoint',
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'.py' : 'text/x-python',
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'.pyc' : 'application/x-python-code',
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'.pyo' : 'application/x-python-code',
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'.qt' : 'video/quicktime',
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'.ra' : 'audio/x-pn-realaudio',
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'.ram' : 'application/x-pn-realaudio',
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'.ras' : 'image/x-cmu-raster',
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'.rdf' : 'application/xml',
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'.rgb' : 'image/x-rgb',
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'.roff' : 'application/x-troff',
|
||||
'.rtx' : 'text/richtext',
|
||||
'.sgm' : 'text/x-sgml',
|
||||
'.sgml' : 'text/x-sgml',
|
||||
'.sh' : 'application/x-sh',
|
||||
'.shar' : 'application/x-shar',
|
||||
'.snd' : 'audio/basic',
|
||||
'.so' : 'application/octet-stream',
|
||||
'.src' : 'application/x-wais-source',
|
||||
'.sv4cpio': 'application/x-sv4cpio',
|
||||
'.sv4crc': 'application/x-sv4crc',
|
||||
'.t': 'application/x-troff',
|
||||
'.tar': 'application/x-tar',
|
||||
'.tcl': 'application/x-tcl',
|
||||
'.tex': 'application/x-tex',
|
||||
'.texi': 'application/x-texinfo',
|
||||
'.sv4crc' : 'application/x-sv4crc',
|
||||
'.t' : 'application/x-troff',
|
||||
'.tar' : 'application/x-tar',
|
||||
'.tcl' : 'application/x-tcl',
|
||||
'.tex' : 'application/x-tex',
|
||||
'.texi' : 'application/x-texinfo',
|
||||
'.texinfo': 'application/x-texinfo',
|
||||
'.tif': 'image/tiff',
|
||||
'.tiff': 'image/tiff',
|
||||
'.tr': 'application/x-troff',
|
||||
'.tsv': 'text/tab-separated-values',
|
||||
'.txt': 'text/plain',
|
||||
'.ustar': 'application/x-ustar',
|
||||
'.wav': 'audio/x-wav',
|
||||
'.xbm': 'image/x-xbitmap',
|
||||
'.xls': 'application/excel',
|
||||
'.xml': 'text/xml',
|
||||
'.xsl': 'application/xml',
|
||||
'.xpm': 'image/x-xpixmap',
|
||||
'.xwd': 'image/x-xwindowdump',
|
||||
'.zip': 'application/zip',
|
||||
'.mp3': 'audio/mpeg',
|
||||
'.ra': 'audio/x-pn-realaudio',
|
||||
'.pdf': 'application/pdf',
|
||||
'.c': 'text/plain',
|
||||
'.bat': 'text/plain',
|
||||
'.h': 'text/plain',
|
||||
'.pl': 'text/plain',
|
||||
'.ksh': 'text/plain',
|
||||
'.ram': 'application/x-pn-realaudio',
|
||||
'.cdf': 'application/x-cdf',
|
||||
'.doc': 'application/msword',
|
||||
'.dot': 'application/msword',
|
||||
'.wiz': 'application/msword',
|
||||
'.xlb': 'application/vnd.ms-excel',
|
||||
'.xls': 'application/vnd.ms-excel',
|
||||
'.ppa': 'application/vnd.ms-powerpoint',
|
||||
'.ppt': 'application/vnd.ms-powerpoint',
|
||||
'.pps': 'application/vnd.ms-powerpoint',
|
||||
'.pot': 'application/vnd.ms-powerpoint',
|
||||
'.pwz': 'application/vnd.ms-powerpoint',
|
||||
'.eml': 'message/rfc822',
|
||||
'.nws': 'message/rfc822',
|
||||
'.mht': 'message/rfc822',
|
||||
'.mhtml': 'message/rfc822',
|
||||
'.css': 'text/css',
|
||||
'.p7c': 'application/pkcs7-mime',
|
||||
'.p12': 'application/x-pkcs12',
|
||||
'.pfx': 'application/x-pkcs12',
|
||||
'.js': 'application/x-javascript',
|
||||
'.m1v': 'video/mpeg',
|
||||
'.mpa': 'video/mpeg',
|
||||
'.vcf': 'text/x-vcard',
|
||||
'.xml': 'text/xml',
|
||||
'.tif' : 'image/tiff',
|
||||
'.tiff' : 'image/tiff',
|
||||
'.tr' : 'application/x-troff',
|
||||
'.tsv' : 'text/tab-separated-values',
|
||||
'.txt' : 'text/plain',
|
||||
'.ustar' : 'application/x-ustar',
|
||||
'.vcf' : 'text/x-vcard',
|
||||
'.wav' : 'audio/x-wav',
|
||||
'.wiz' : 'application/msword',
|
||||
'.xbm' : 'image/x-xbitmap',
|
||||
'.xlb' : 'application/vnd.ms-excel',
|
||||
# Duplicates :(
|
||||
'.xls' : 'application/excel',
|
||||
'.xls' : 'application/vnd.ms-excel',
|
||||
'.xml' : 'text/xml',
|
||||
'.xpm' : 'image/x-xpixmap',
|
||||
'.xsl' : 'application/xml',
|
||||
'.xwd' : 'image/x-xwindowdump',
|
||||
'.zip' : 'application/zip',
|
||||
}
|
||||
|
||||
# These are non-standard types, commonly found in the wild. They will only
|
||||
# match if strict=0 flag is given to the API methods.
|
||||
|
||||
# Please sort these too
|
||||
common_types = {
|
||||
'.jpg' : 'image/jpg',
|
||||
'.mid' : 'audio/midi',
|
||||
'.midi': 'audio/midi',
|
||||
'.pct' : 'image/pict',
|
||||
'.pic' : 'image/pict',
|
||||
'.pict': 'image/pict',
|
||||
'.rtf' : 'application/rtf',
|
||||
'.xul' : 'text/xul'
|
||||
}
|
||||
|
||||
|
||||
def usage(code, msg=''):
|
||||
print __doc__
|
||||
if msg: print msg
|
||||
sys.exit(code)
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
import sys
|
||||
print guess_type(sys.argv[1])
|
||||
import getopt
|
||||
|
||||
try:
|
||||
opts, args = getopt.getopt(sys.argv[1:], 'hle',
|
||||
['help', 'lenient', 'extension'])
|
||||
except getopt.error, msg:
|
||||
usage(1, msg)
|
||||
|
||||
strict = 1
|
||||
extension = 0
|
||||
for opt, arg in opts:
|
||||
if opt in ('-h', '--help'):
|
||||
usage(0)
|
||||
elif opt in ('-l', '--lenient'):
|
||||
strict = 0
|
||||
elif opt in ('-e', '--extension'):
|
||||
extension = 1
|
||||
for gtype in args:
|
||||
if extension:
|
||||
guess = guess_extension(gtype, strict)
|
||||
if not guess: print "I don't know anything about type", gtype
|
||||
else: print guess
|
||||
else:
|
||||
guess, encoding = guess_type(gtype, strict)
|
||||
if not guess: print "I don't know anything about type", gtype
|
||||
else: print 'type:', guess, 'encoding:', encoding
|
||||
|
|
|
|||
|
|
@ -38,6 +38,18 @@ class MimeTypesTestCase(unittest.TestCase):
|
|||
self.assertEqual(self.db.guess_extension("x-application/x-unittest"),
|
||||
".pyunit")
|
||||
|
||||
def test_non_standard_types(self):
|
||||
# First try strict
|
||||
self.assertEqual(self.db.guess_type('foo.xul', strict=1),
|
||||
(None, None))
|
||||
self.assertEqual(self.db.guess_extension('image/jpg', strict=1),
|
||||
None)
|
||||
# And then non-strict
|
||||
self.assertEqual(self.db.guess_type('foo.xul', strict=0),
|
||||
('text/xul', None))
|
||||
self.assertEqual(self.db.guess_extension('image/jpg', strict=0),
|
||||
'.jpg')
|
||||
|
||||
|
||||
def test_main():
|
||||
test_support.run_unittest(MimeTypesTestCase)
|
||||
|
|
|
|||
Loading…
Reference in New Issue