Add type parameter for contents GET requests

IPython/html/services/contents/filemanager.py

@@ -255,13 +255,18 @@ class FileContentsManager(ContentsManager):
             self.validate_notebook_model(model)
         return model
 
-    def get_model(self, path, content=True):
+    def get_model(self, path, content=True, type_=None):
         """ Takes a path for an entity and returns its model
 
         Parameters
         ----------
         path : str
             the API path that describes the relative path for the target
+        content : bool
+            Whether to include the contents in the reply
+        type_ : str, optional
+            The requested type - 'file', 'notebook', or 'directory'.
+            Will raise HTTPError 406 if the content doesn't match.
 
         Returns
         -------
@@ -276,10 +281,16 @@ class FileContentsManager(ContentsManager):
 
         os_path = self._get_os_path(path)
         if os.path.isdir(os_path):
+            if type_ not in (None, 'directory'):
+                raise web.HTTPError(400,
+                                u'%s is a directory, not a %s' % (path, type_))
             model = self._dir_model(path, content=content)
-        elif path.endswith('.ipynb'):
+        elif type_ == 'notebook' or (type_ is None and path.endswith('.ipynb')):
             model = self._notebook_model(path, content=content)
         else:
+            if type_ == 'directory':
+                raise web.HTTPError(400,
+                                u'%s is not a directory')
             model = self._file_model(path, content=content)
         return model
 

IPython/html/services/contents/handlers.py

@@ -58,7 +58,11 @@ class ContentsHandler(IPythonHandler):
         of the files and directories it contains.
         """
         path = path or ''
-        model = self.contents_manager.get_model(path=path)
+        type_ = self.get_query_argument('type', default=None)
+        if type_ not in {None, 'directory', 'file', 'notebook'}:
+            raise web.HTTPError(400, u'Type %r is invalid' % type_)
+
+        model = self.contents_manager.get_model(path=path, type_=type_)
         if model['type'] == 'directory':
             # group listing by type, then by name (case-insensitive)
             # FIXME: sorting should be done in the frontends

IPython/html/services/contents/manager.py

@@ -135,7 +135,7 @@ class ContentsManager(LoggingConfigurable):
         """
         return self.file_exists(path) or self.dir_exists(path)
 
-    def get_model(self, path, content=True):
+    def get_model(self, path, content=True, type_=None):
         """Get the model of a file or directory with or without content."""
         raise NotImplementedError('must be implemented in a subclass')
 

IPython/html/services/contents/tests/test_contents_api.py

@@ -46,7 +46,9 @@ class API(object):
     def list(self, path='/'):
         return self._req('GET', path)
 
-    def read(self, path):
+    def read(self, path, type_=None):
+        if type_ is not None:
+            path += '?type=' + type_
         return self._req('GET', path)
 
     def create_untitled(self, path='/', ext='.ipynb'):
@@ -259,6 +261,13 @@ class APITest(NotebookTestBase):
         with assert_http_error(404):
             self.api.read('foo/q.txt')
 
+    def test_get_bad_type(self):
+        with assert_http_error(400):
+            self.api.read(u'unicodé', type_='file')  # this is a directory
+
+        with assert_http_error(400):
+            self.api.read(u'unicodé/innonascii.ipynb', type_='directory')
+
     def _check_created(self, resp, path, type='notebook'):
         self.assertEqual(resp.status_code, 201)
         location_header = py3compat.str_to_unicode(resp.headers['Location'])

IPython/html/services/contents/tests/test_manager.py

@@ -159,6 +159,12 @@ class TestContentsManager(TestCase):
         self.assertEqual(model['name'], name)
         self.assertEqual(model['path'], path)
 
+        nb_as_file = cm.get_model(path, content=True, type_='file')
+        self.assertEqual(nb_as_file['path'], path)
+        self.assertEqual(nb_as_file['type'], 'file')
+        self.assertEqual(nb_as_file['format'], 'text')
+        self.assertNotIsInstance(nb_as_file['content'], dict)
+
         # Test in sub-directory
         sub_dir = '/foo/'
         self.make_dir(cm.root_dir, 'foo')
@@ -170,6 +176,14 @@ class TestContentsManager(TestCase):
         self.assertIn('content', model2)
         self.assertEqual(model2['name'], 'Untitled0.ipynb')
         self.assertEqual(model2['path'], '{0}/{1}'.format(sub_dir.strip('/'), name))
+
+        # Test getting directory model
+        dirmodel = cm.get_model('foo')
+        self.assertEqual(dirmodel['type'], 'directory')
+
+        with self.assertRaises(HTTPError):
+            cm.get_model('foo', type_='file')
+
     
     @dec.skip_win32
     def test_bad_symlink(self):