# hgweb/common.py - Utility functions needed by hgweb_mod and hgwebdir_mod

#

# Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net>

# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>

#

# This software may be used and distributed according to the terms

# of the GNU General Public License, incorporated herein by reference.

import os, mimetypes

import os.path

def get_mtime(repo_path):

    hg_path = os.path.join(repo_path, ".hg")

    cl_path = os.path.join(hg_path, "00changelog.i")

    if os.path.exists(os.path.join(cl_path)):

        return os.stat(cl_path).st_mtime

    else:

        return os.stat(hg_path).st_mtime

def staticfile(directory, fname, req):

    """return a file inside directory with guessed content-type header

    fname always uses '/' as directory separator and isn't allowed to

    contain unusual path components.

    Content-type is guessed using the mimetypes module.

    Return an empty string if fname is illegal or file not found.

    """

    parts = fname.split('/')

    path = directory

    for part in parts:

        if (part in ('', os.curdir, os.pardir) or

            os.sep in part or os.altsep is not None and os.altsep in part):

            return ""

        path = os.path.join(path, part)

    try:

        os.stat(path)

        ct = mimetypes.guess_type(path)[0] or "text/plain"

        req.header([('Content-type', ct),

                    ('Content-length', os.path.getsize(path))])

        return file(path, 'rb').read()

    except (TypeError, OSError):

        # illegal fname or unreadable file

        return ""