add blueimp-jquery-file-upload library

1 files changed, 170 insertions, 0 deletions

diff --git a/library/blueimp_upload/server/gae-python/main.py b/library/blueimp_upload/server/gae-python/main.py
new file mode 100644
index 000000000..6276be6a0
--- /dev/null
+++ b/library/blueimp_upload/server/gae-python/main.py
@@ -0,0 +1,170 @@
+# -*- coding: utf-8 -*-
+#
+# jQuery File Upload Plugin GAE Python Example 2.2.0
+# https://github.com/blueimp/jQuery-File-Upload
+#
+# Copyright 2011, Sebastian Tschan
+# https://blueimp.net
+#
+# Licensed under the MIT license:
+# http://www.opensource.org/licenses/MIT
+#
+
+from __future__ import with_statement
+from google.appengine.api import files, images
+from google.appengine.ext import blobstore, deferred
+from google.appengine.ext.webapp import blobstore_handlers
+import json
+import re
+import urllib
+import webapp2
+
+WEBSITE = 'https://blueimp.github.io/jQuery-File-Upload/'
+MIN_FILE_SIZE = 1  # bytes
+MAX_FILE_SIZE = 5000000  # bytes
+IMAGE_TYPES = re.compile('image/(gif|p?jpeg|(x-)?png)')
+ACCEPT_FILE_TYPES = IMAGE_TYPES
+THUMBNAIL_MODIFICATOR = '=s80'  # max width / height
+EXPIRATION_TIME = 300  # seconds
+
+
+def cleanup(blob_keys):
+    blobstore.delete(blob_keys)
+
+
+class UploadHandler(webapp2.RequestHandler):
+
+    def initialize(self, request, response):
+        super(UploadHandler, self).initialize(request, response)
+        self.response.headers['Access-Control-Allow-Origin'] = '*'
+        self.response.headers[
+            'Access-Control-Allow-Methods'
+        ] = 'OPTIONS, HEAD, GET, POST, PUT, DELETE'
+        self.response.headers[
+            'Access-Control-Allow-Headers'
+        ] = 'Content-Type, Content-Range, Content-Disposition'
+
+    def validate(self, file):
+        if file['size'] < MIN_FILE_SIZE:
+            file['error'] = 'File is too small'
+        elif file['size'] > MAX_FILE_SIZE:
+            file['error'] = 'File is too big'
+        elif not ACCEPT_FILE_TYPES.match(file['type']):
+            file['error'] = 'Filetype not allowed'
+        else:
+            return True
+        return False
+
+    def get_file_size(self, file):
+        file.seek(0, 2)  # Seek to the end of the file
+        size = file.tell()  # Get the position of EOF
+        file.seek(0)  # Reset the file position to the beginning
+        return size
+
+    def write_blob(self, data, info):
+        blob = files.blobstore.create(
+            mime_type=info['type'],
+            _blobinfo_uploaded_filename=info['name']
+        )
+        with files.open(blob, 'a') as f:
+            f.write(data)
+        files.finalize(blob)
+        return files.blobstore.get_blob_key(blob)
+
+    def handle_upload(self):
+        results = []
+        blob_keys = []
+        for name, fieldStorage in self.request.POST.items():
+            if type(fieldStorage) is unicode:
+                continue
+            result = {}
+            result['name'] = re.sub(
+                r'^.*\\',
+                '',
+                fieldStorage.filename
+            )
+            result['type'] = fieldStorage.type
+            result['size'] = self.get_file_size(fieldStorage.file)
+            if self.validate(result):
+                blob_key = str(
+                    self.write_blob(fieldStorage.value, result)
+                )
+                blob_keys.append(blob_key)
+                result['deleteType'] = 'DELETE'
+                result['deleteUrl'] = self.request.host_url +\
+                    '/?key=' + urllib.quote(blob_key, '')
+                if (IMAGE_TYPES.match(result['type'])):
+                    try:
+                        result['url'] = images.get_serving_url(
+                            blob_key,
+                            secure_url=self.request.host_url.startswith(
+                                'https'
+                            )
+                        )
+                        result['thumbnailUrl'] = result['url'] +\
+                            THUMBNAIL_MODIFICATOR
+                    except:  # Could not get an image serving url
+                        pass
+                if not 'url' in result:
+                    result['url'] = self.request.host_url +\
+                        '/' + blob_key + '/' + urllib.quote(
+                            result['name'].encode('utf-8'), '')
+            results.append(result)
+        deferred.defer(
+            cleanup,
+            blob_keys,
+            _countdown=EXPIRATION_TIME
+        )
+        return results
+
+    def options(self):
+        pass
+
+    def head(self):
+        pass
+
+    def get(self):
+        self.redirect(WEBSITE)
+
+    def post(self):
+        if (self.request.get('_method') == 'DELETE'):
+            return self.delete()
+        result = {'files': self.handle_upload()}
+        s = json.dumps(result, separators=(',', ':'))
+        redirect = self.request.get('redirect')
+        if redirect:
+            return self.redirect(str(
+                redirect.replace('%s', urllib.quote(s, ''), 1)
+            ))
+        if 'application/json' in self.request.headers.get('Accept'):
+            self.response.headers['Content-Type'] = 'application/json'
+        self.response.write(s)
+
+    def delete(self):
+        key = self.request.get('key') or ''
+        blobstore.delete(key)
+        s = json.dumps({key: True}, separators=(',', ':'))
+        if 'application/json' in self.request.headers.get('Accept'):
+            self.response.headers['Content-Type'] = 'application/json'
+        self.response.write(s)
+
+
+class DownloadHandler(blobstore_handlers.BlobstoreDownloadHandler):
+    def get(self, key, filename):
+        if not blobstore.get(key):
+            self.error(404)
+        else:
+            # Prevent browsers from MIME-sniffing the content-type:
+            self.response.headers['X-Content-Type-Options'] = 'nosniff'
+            # Cache for the expiration time:
+            self.response.headers['Cache-Control'] = 'public,max-age=%d' % EXPIRATION_TIME
+            # Send the file forcing a download dialog:
+            self.send_blob(key, save_as=filename, content_type='application/octet-stream')
+
+app = webapp2.WSGIApplication(
+    [
+        ('/', UploadHandler),
+        ('/([^/]+)/([^/]+)', DownloadHandler)
+    ],
+    debug=True
+)