Uploaded Test files

venv/Lib/site-packages/notebook/files/handlers.py

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+"""Serve files directly from the ContentsManager."""
+
+# Copyright (c) Jupyter Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+import mimetypes
+import json
+from base64 import decodebytes
+
+from tornado import  gen, web
+
+from notebook.base.handlers import IPythonHandler
+from notebook.utils import maybe_future
+
+
+class FilesHandler(IPythonHandler):
+    """serve files via ContentsManager
+
+    Normally used when ContentsManager is not a FileContentsManager.
+
+    FileContentsManager subclasses use AuthenticatedFilesHandler by default,
+    a subclass of StaticFileHandler.
+    """
+
+    @property
+    def content_security_policy(self):
+        # In case we're serving HTML/SVG, confine any Javascript to a unique
+        # origin so it can't interact with the notebook server.
+        return super(FilesHandler, self).content_security_policy + \
+               "; sandbox allow-scripts"
+
+    @web.authenticated
+    def head(self, path):
+        self.check_xsrf_cookie()
+        return self.get(path, include_body=False)
+
+    @web.authenticated
+    @gen.coroutine
+    def get(self, path, include_body=True):
+        # /files/ requests must originate from the same site
+        self.check_xsrf_cookie()
+        cm = self.contents_manager
+
+        if cm.is_hidden(path) and not cm.allow_hidden:
+            self.log.info("Refusing to serve hidden file, via 404 Error")
+            raise web.HTTPError(404)
+
+        path = path.strip('/')
+        if '/' in path:
+            _, name = path.rsplit('/', 1)
+        else:
+            name = path
+        
+        model = yield maybe_future(cm.get(path, type='file', content=include_body))
+        
+        if self.get_argument("download", False):
+            self.set_attachment_header(name)
+        
+        # get mimetype from filename
+        if name.lower().endswith('.ipynb'):
+            self.set_header('Content-Type', 'application/x-ipynb+json')
+        else:
+            cur_mime = mimetypes.guess_type(name)[0]
+            if cur_mime == 'text/plain':
+                self.set_header('Content-Type', 'text/plain; charset=UTF-8')
+            elif cur_mime is not None:
+                self.set_header('Content-Type', cur_mime)
+            else:
+                if model['format'] == 'base64':
+                    self.set_header('Content-Type', 'application/octet-stream')
+                else:
+                    self.set_header('Content-Type', 'text/plain; charset=UTF-8')
+
+        if include_body:
+            if model['format'] == 'base64':
+                b64_bytes = model['content'].encode('ascii')
+                self.write(decodebytes(b64_bytes))
+            elif model['format'] == 'json':
+                self.write(json.dumps(model['content']))
+            else:
+                self.write(model['content'])
+            self.flush()
+
+
+default_handlers = []