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Viewing changes to loggerhead/apps/branch.py

  • Committer: Michael Hudson
  • Date: 2007-11-19 08:55:10 UTC
  • mto: This revision was merged to the branch mainline in revision 142.
  • Revision ID: michael.hudson@canonical.com-20071119085510-ossv2rsqdcg7ikzh
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loggerhead/apps/branch.py
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"""The WSGI application for serving a Bazaar branch."""
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import logging
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import urllib
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import sys
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import bzrlib.branch
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import bzrlib.lru_cache
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from paste import request
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from paste import httpexceptions
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from loggerhead.apps import static_app
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from loggerhead.controllers.changelog_ui import ChangeLogUI
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from loggerhead.controllers.inventory_ui import InventoryUI
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from loggerhead.controllers.annotate_ui import AnnotateUI
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from loggerhead.controllers.revision_ui import RevisionUI
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from loggerhead.controllers.atom_ui import AtomUI
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from loggerhead.controllers.download_ui import DownloadUI
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from loggerhead.controllers.search_ui import SearchUI
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from loggerhead.controllers.diff_ui import DiffUI
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from loggerhead.history import History
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from loggerhead import util
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class BranchWSGIApp(object):
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    def __init__(self, branch, friendly_name=None, config={},
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                 graph_cache=None, branch_link=None, is_root=False):
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        self.branch = branch
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        self._config = config
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        self.friendly_name = friendly_name
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        self.branch_link = branch_link  # Currently only used in Launchpad
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        self.log = logging.getLogger('loggerhead.%s' % friendly_name)
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        if graph_cache is None:
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            graph_cache = bzrlib.lru_cache.LRUCache()
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        self.graph_cache = graph_cache
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        self.is_root = is_root
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    def get_history(self):
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        _history = History(self.branch, self.graph_cache)
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        cache_path = self._config.get('cachepath', None)
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        if cache_path is not None:
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            # Only import the cache if we're going to use it.
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            # This makes sqlite optional
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            try:
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                from loggerhead.changecache import FileChangeCache
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            except ImportError:
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                self.log.debug("Couldn't load python-sqlite,"
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                               " continuing without using a cache")
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            else:
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                _history.use_file_cache(
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                    FileChangeCache(_history, cache_path))
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        return _history
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    def url(self, *args, **kw):
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        if isinstance(args[0], list):
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            args = args[0]
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        qs = []
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        for k, v in kw.iteritems():
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            if v is not None:
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                qs.append('%s=%s'%(k, urllib.quote(v)))
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        qs = '&'.join(qs)
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        return request.construct_url(
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            self._environ, script_name=self._url_base,
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            path_info='/'.join(args),
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            querystring=qs)
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    def context_url(self, *args, **kw):
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        kw = util.get_context(**kw)
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        return self.url(*args, **kw)
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    def static_url(self, path):
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        return self._static_url_base + path
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    controllers_dict = {
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        'annotate': AnnotateUI,
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        'changes': ChangeLogUI,
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        'files': InventoryUI,
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        'revision': RevisionUI,
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        'download': DownloadUI,
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        'atom': AtomUI,
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        'search': SearchUI,
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        'diff': DiffUI,
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        }
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    def last_updated(self):
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        h = self.get_history()
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        change = h.get_changes([h.last_revid])[0]
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        return change.date
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    def branch_url(self):
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        return self.branch.get_config().get_user_option('public_branch')
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    def app(self, environ, start_response):
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        self._url_base = environ['SCRIPT_NAME']
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        self._static_url_base = environ.get('loggerhead.static.url')
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        if self._static_url_base is None:
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            self._static_url_base = self._url_base
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        self._environ = environ
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        path = request.path_info_pop(environ)
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        if not path:
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            raise httpexceptions.HTTPMovedPermanently(
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                self._url_base + '/changes')
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        if path == 'static':
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            return static_app(environ, start_response)
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        cls = self.controllers_dict.get(path)
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        if cls is None:
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            raise httpexceptions.HTTPNotFound()
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        self.branch.lock_read()
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        try:
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            try:
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                c = cls(self, self.get_history())
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                return c(environ, start_response)
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            except:
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                environ['exc_info'] = sys.exc_info()
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                environ['branch'] = self
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                raise
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        finally:
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            self.branch.unlock()