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# Copyright (C) 2007-2008 The University of Melbourne
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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# Module: File Service / Listing
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# Handles the return part of the 2-stage process of fileservice. This
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# is both the directory listing, and the raw serving of non-directory files.
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# File Service Format.
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# If a non-directory file is requested, then the HTTP response body will be
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# the verbatim bytes of that file (if the file is valid). The HTTP response
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# headers will include the guessed content type of the file, and the header
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# "X-IVLE-Return: File".
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# Directory Listing Format.
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# If the path requested is a directory, then the HTTP response body will be
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# a valid JSON string describing the directory. The HTTP response headers
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# will include the header "X-IVLE-Return: Dir".
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# The JSON structure is as follows:
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# * The top-level value is an object. It always contains the key "listing",
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# whose value is the primary listing object. It may also contain a key
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# "clipboard" which contains the clipboard object.
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# * The value for "listing" is an object, with one member for each file in the
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# directory, plus an additional member (key ".") for the directory itself.
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# * Each member's key is the filename. Its value is an object, which has
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# various members describing the file.
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# The members of this object are as follows:
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# * svnstatus: String. The svn status of the file. Either all files in a
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# directory or no files have an svnstatus. String may take the values:
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# - none - does not exist
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# - unversioned - is not a versioned thing in this wc
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# - normal - exists, but uninteresting.
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# - added - is scheduled for addition
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# - missing - under v.c., but is missing
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# - deleted - scheduled for deletion
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# - replaced - was deleted and then re-added
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# - modified - text or props have been modified
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# - merged - local mods received repos mods
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# - conflicted - local mods received conflicting repos mods
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# - ignored - a resource marked as ignored
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# - obstructed - an unversioned resource is in the way of the versioned resource
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# - external - an unversioned path populated by an svn:external property
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# - incomplete - a directory doesn't contain a complete entries list
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# If svnstatus is "Missing" then the file has no other attributes.
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# * published: Boolean. True if the file is published. (Marked by a
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# .published file in the folder)
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# * isdir: Boolean. True if the file is a directory. Always present unless
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# svnstatus is "missing".
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# * size: Number. Size of the file in bytes. Present for non-directory
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# * type: String. Guessed mime type of the file. Present for non-directory
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# * mtime: Number. Number of seconds elapsed since the epoch.
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# The epoch is not defined (this is an arbitrary number used for sorting
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# * mtime_nice: String. Modification time of the file or directory. Always
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# present unless svnstatus is "Missing". Human-friendly.
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# Members are not guaranteed to be present - client code should always check
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# for each member that it is present, and handle gracefully if a member is not
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# The listing object is guaranteed to have a "." key. Use this key to
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# determine whether the directory is under version control or not. If this
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# member does NOT have a "svnstatus" key, or "svnstatus" is "unversioned",
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# then the directory is not under revision control (and no other files will
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# have "svnstatus" either).
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# The top-level object MAY contain a "clipboard" key, which specifies the
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# files copied to the clipboard. This can be used by the client to show the
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# user what files will be pasted. At the very least, the client should take
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# the presence or absence of a "clipboard" key as whether to grey out the
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# The "clipboard" object has three members:
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# * mode: String. Either "copy" or "cut".
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# * base: String. Path relative to the user's root. The common path between
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# * files: Array of Strings. Each element is a filename relative to base.
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# Base and files exactly correspond to the listing path and argument paths
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# which were supplied during the last copy or cut request.
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from cgi import parse_qs
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from common import (util, studpath)
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import conf.mimetypes
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# Make a Subversion client object
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svnclient = pysvn.Client()
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# Whether or not to ignore dot files.
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# TODO check settings!
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ignore_dot_files = True
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# application/json is the "best" content type but is not good for
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# debugging because Firefox just tries to download it
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mime_dirlisting = "text/plain"
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#mime_dirlisting = "application/json"
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def handle_return(req, return_contents):
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Perform the "return" part of the response.
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This function returns the file or directory listing contained in
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req.path. Sets the HTTP response code in req, writes additional headers,
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and writes the HTTP response, if any.
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If return_contents is True, and the path is a non-directory, returns the
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contents of the file verbatim. If False, returns a directory listing
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with a single file, ".", and info about the file.
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If the path is a directory, return_contents is ignored.
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(user, jail, path) = studpath.url_to_jailpaths(req.path)
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# FIXME: What to do about req.path == ""?
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# Currently goes to 403 Forbidden.
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urlpath = urlparse.urlparse(path)
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req.status = req.HTTP_FORBIDDEN
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req.headers_out['X-IVLE-Return-Error'] = 'Forbidden'
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req.write("Forbidden")
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elif not os.access(path, os.R_OK):
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req.status = req.HTTP_NOT_FOUND
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req.headers_out['X-IVLE-Return-Error'] = 'File not found'
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req.write("File not found")
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elif os.path.isdir(path):
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# It's a directory. Return the directory listing.
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req.content_type = mime_dirlisting
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req.headers_out['X-IVLE-Return'] = 'Dir'
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req.write(cjson.encode(get_dirlisting(req, svnclient, path)))
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elif return_contents:
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# It's a file. Return the file contents.
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# First get the mime type of this file
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# (Note that importing common.util has already initialised mime types)
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(type, _) = mimetypes.guess_type(path)
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type = conf.mimetypes.default_mimetype
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req.content_type = type
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req.headers_out['X-IVLE-Return'] = 'File'
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send_file(req, svnclient, path)
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# It's a file. Return a "fake directory listing" with just this file.
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req.content_type = mime_dirlisting
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req.headers_out['X-IVLE-Return'] = 'File'
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req.write(cjson.encode(get_dirlisting(req, svnclient, path)))
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def _get_revision_or_die(req, svnclient, path):
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'''Looks for a revision specification in req's URL, returning the revision
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specified. Returns None if there was no revision specified. Errors and
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terminates the request if the specification was bad, or it doesn't exist
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# Work out the revisions from query
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r_str = req.get_fieldstorage().getfirst("r")
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revision = common.svn.revision_from_string(r_str)
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# Was some revision specified AND (it didn't resolve OR it was nonexistent)
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if r_str and not (revision and
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common.svn.revision_exists(svnclient, path, revision)):
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req.status = req.HTTP_NOT_FOUND
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req.headers_out['X-IVLE-Return-Error'] = 'Revision not found'
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req.ensure_headers_written()
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req.write('Revision not found')
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def send_file(req, svnclient, path):
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revision = _get_revision_or_die(req, svnclient, path)
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req.write(svnclient.cat(path, revision=revision))
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def get_dirlisting(req, svnclient, path):
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"""Given a local absolute path, creates a directory listing object
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ready to be JSONized and sent to the client.
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req: Request object. Will not be mutated; just reads the session.
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svnclient: Svn client object.
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path: String. Absolute path on the local file system. Not checked,
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must already be guaranteed safe. May be a file or a directory.
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revision = _get_revision_or_die(req, svnclient, path)
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# Start by trying to do an SVN status, so we can report file version
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ls_list = svnclient.list(path, revision=revision, recurse=False)
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filename, attrs = PysvnList_to_fileinfo(path, ls)
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listing[filename.decode('utf-8')] = attrs
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status_list = svnclient.status(path, recurse=False, get_all=True,
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for status in status_list:
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filename, attrs = PysvnStatus_to_fileinfo(path, status)
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listing[filename.decode('utf-8')] = attrs
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except pysvn.ClientError:
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# Presumably the directory is not under version control.
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# Fallback to just an OS file listing.
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for filename in os.listdir(path):
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listing[filename.decode('utf-8')] = file_to_fileinfo(path, filename)[1]
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# Non-directories will error - that's OK, we just want the "."
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# The subversion one includes "." while the OS one does not.
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# Add "." to the output, so the caller can see we are
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listing["."] = file_to_fileinfo(path, "")[1]
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for fn in listing.keys():
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if fn != "." and fn.startswith("."):
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# Listing is a nested object inside the top-level JSON.
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listing = {"listing" : listing}
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listing['revision'] = revision.number
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# The other object is the clipboard, if present in the browser session.
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# This can go straight from the session to JSON.
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session = req.get_session()
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if session and 'clipboard' in session:
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# In CGI mode, we can't get our hands on the
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# session (for the moment), so just leave it out.
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listing['clipboard'] = session['clipboard']
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def _fullpath_stat_fileinfo(fullpath):
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file_stat = os.stat(fullpath)
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return _stat_fileinfo(fullpath, file_stat)
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def _stat_fileinfo(fullpath, file_stat):
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if stat.S_ISDIR(file_stat.st_mode):
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d["type_nice"] = util.nice_filetype("/")
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# Only directories can be published
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d["published"] = studpath.published(fullpath)
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d["size"] = file_stat.st_size
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(type, _) = mimetypes.guess_type(fullpath)
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type = conf.mimetypes.default_mimetype
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d["type_nice"] = util.nice_filetype(fullpath)
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d["mtime"] = file_stat.st_mtime
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d["mtime_nice"] = common.date.make_date_nice(file_stat.st_mtime)
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d["mtime_short"] = common.date.make_date_nice_short(file_stat.st_mtime)
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def file_to_fileinfo(path, filename):
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"""Given a filename (relative to a given path), gets all the info "ls"
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needs to display about the filename. Returns pair mapping filename to
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a dict containing a number of other fields."""
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fullpath = path if filename in ('', '.') else os.path.join(path, filename)
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return filename, _fullpath_stat_fileinfo(fullpath)
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def PysvnStatus_to_fileinfo(path, status):
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"""Given a PysvnStatus object, gets all the info "ls"
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needs to display about the filename. Returns a pair mapping filename to
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a dict containing a number of other fields."""
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path = os.path.normcase(path)
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fullpath = status.path
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# If this is "." (the directory itself)
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if path == os.path.normcase(fullpath):
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# If this directory is unversioned, then we aren't
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# looking at any interesting files, so throw
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# an exception and default to normal OS-based listing.
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if status.text_status == pysvn.wc_status_kind.unversioned:
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raise pysvn.ClientError
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# We actually want to return "." because we want its
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filename = os.path.basename(fullpath)
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text_status = status.text_status
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d = {'svnstatus': str(text_status)}
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d.update(_fullpath_stat_fileinfo(fullpath))
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# Here if, eg, the file is missing.
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# Can't get any more information so just return d
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def PysvnList_to_fileinfo(path, list):
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"""Given a List object from pysvn.Client.list, gets all the info "ls"
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needs to display about the filename. Returns a pair mapping filename to
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a dict containing a number of other fields."""
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path = os.path.normcase(path)
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fullpath = pysvnlist.path
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# If this is "." (the directory itself)
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if path == os.path.normcase(fullpath):
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# If this directory is unversioned, then we aren't
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# looking at any interesting files, so throw
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# an exception and default to normal OS-based listing.
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#if status.text_status == pysvn.wc_status_kind.unversioned:
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# raise pysvn.ClientError
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# We actually want to return "." because we want its
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filename = os.path.basename(fullpath)
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d = {'svnstatus': 'revision'} # A special status.
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wrapped = common.svn.PysvnListStatWrapper(pysvnlist)
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d.update(_stat_fileinfo(fullpath, wrapped))
added
removed
lib/fileservice_lib/listing.py
