--- /dev/null
+# -*- coding: utf-8 -*-
+#
+# jQuery File Upload Plugin GAE Python Example
+# https://github.com/blueimp/jQuery-File-Upload
+#
+# Copyright 2011, Sebastian Tschan
+# https://blueimp.net
+#
+# Licensed under the MIT license:
+# https://opensource.org/licenses/MIT
+#
+
+from google.appengine.api import memcache, images
+import json
+import os
+import re
+import urllib
+import webapp2
+
+DEBUG=os.environ.get('SERVER_SOFTWARE', '').startswith('Dev')
+WEBSITE = 'https://blueimp.github.io/jQuery-File-Upload/'
+MIN_FILE_SIZE = 1 # bytes
+# Max file size is memcache limit (1MB) minus key size minus overhead:
+MAX_FILE_SIZE = 999000 # bytes
+IMAGE_TYPES = re.compile('image/(gif|p?jpeg|(x-)?png)')
+ACCEPT_FILE_TYPES = IMAGE_TYPES
+THUMB_MAX_WIDTH = 80
+THUMB_MAX_HEIGHT = 80
+THUMB_SUFFIX = '.'+str(THUMB_MAX_WIDTH)+'x'+str(THUMB_MAX_HEIGHT)+'.png'
+EXPIRATION_TIME = 300 # seconds
+# If set to None, only allow redirects to the referer protocol+host.
+# Set to a regexp for custom pattern matching against the redirect value:
+REDIRECT_ALLOW_TARGET = None
+
+class CORSHandler(webapp2.RequestHandler):
+ def cors(self):
+ headers = self.response.headers
+ headers['Access-Control-Allow-Origin'] = '*'
+ headers['Access-Control-Allow-Methods'] =\
+ 'OPTIONS, HEAD, GET, POST, DELETE'
+ headers['Access-Control-Allow-Headers'] =\
+ 'Content-Type, Content-Range, Content-Disposition'
+
+ def initialize(self, request, response):
+ super(CORSHandler, self).initialize(request, response)
+ self.cors()
+
+ def json_stringify(self, obj):
+ return json.dumps(obj, separators=(',', ':'))
+
+ def options(self, *args, **kwargs):
+ pass
+
+class UploadHandler(CORSHandler):
+ 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 validate_redirect(self, redirect):
+ if redirect:
+ if REDIRECT_ALLOW_TARGET:
+ return REDIRECT_ALLOW_TARGET.match(redirect)
+ referer = self.request.headers['referer']
+ if referer:
+ from urlparse import urlparse
+ parts = urlparse(referer)
+ redirect_allow_target = '^' + re.escape(
+ parts.scheme + '://' + parts.netloc + '/'
+ )
+ return re.match(redirect_allow_target, redirect)
+ 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):
+ key = urllib.quote(info['type'].encode('utf-8'), '') +\
+ '/' + str(hash(data)) +\
+ '/' + urllib.quote(info['name'].encode('utf-8'), '')
+ try:
+ memcache.set(key, data, time=EXPIRATION_TIME)
+ except: #Failed to add to memcache
+ return (None, None)
+ thumbnail_key = None
+ if IMAGE_TYPES.match(info['type']):
+ try:
+ img = images.Image(image_data=data)
+ img.resize(
+ width=THUMB_MAX_WIDTH,
+ height=THUMB_MAX_HEIGHT
+ )
+ thumbnail_data = img.execute_transforms()
+ thumbnail_key = key + THUMB_SUFFIX
+ memcache.set(
+ thumbnail_key,
+ thumbnail_data,
+ time=EXPIRATION_TIME
+ )
+ except: #Failed to resize Image or add to memcache
+ thumbnail_key = None
+ return (key, thumbnail_key)
+
+ def handle_upload(self):
+ results = []
+ for name, fieldStorage in self.request.POST.items():
+ if type(fieldStorage) is unicode:
+ continue
+ result = {}
+ result['name'] = urllib.unquote(fieldStorage.filename)
+ result['type'] = fieldStorage.type
+ result['size'] = self.get_file_size(fieldStorage.file)
+ if self.validate(result):
+ key, thumbnail_key = self.write_blob(
+ fieldStorage.value,
+ result
+ )
+ if key is not None:
+ result['url'] = self.request.host_url + '/' + key
+ result['deleteUrl'] = result['url']
+ result['deleteType'] = 'DELETE'
+ if thumbnail_key is not None:
+ result['thumbnailUrl'] = self.request.host_url +\
+ '/' + thumbnail_key
+ else:
+ result['error'] = 'Failed to store uploaded file.'
+ results.append(result)
+ return results
+
+ 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 = self.json_stringify(result)
+ redirect = self.request.get('redirect')
+ if self.validate_redirect(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)
+
+class FileHandler(CORSHandler):
+ def normalize(self, str):
+ return urllib.quote(urllib.unquote(str), '')
+
+ def get(self, content_type, data_hash, file_name):
+ content_type = self.normalize(content_type)
+ file_name = self.normalize(file_name)
+ key = content_type + '/' + data_hash + '/' + file_name
+ data = memcache.get(key)
+ if data is None:
+ return self.error(404)
+ # Prevent browsers from MIME-sniffing the content-type:
+ self.response.headers['X-Content-Type-Options'] = 'nosniff'
+ content_type = urllib.unquote(content_type)
+ if not IMAGE_TYPES.match(content_type):
+ # Force a download dialog for non-image types:
+ content_type = 'application/octet-stream'
+ elif file_name.endswith(THUMB_SUFFIX):
+ content_type = 'image/png'
+ self.response.headers['Content-Type'] = content_type
+ # Cache for the expiration time:
+ self.response.headers['Cache-Control'] = 'public,max-age=%d' \
+ % EXPIRATION_TIME
+ self.response.write(data)
+
+ def delete(self, content_type, data_hash, file_name):
+ content_type = self.normalize(content_type)
+ file_name = self.normalize(file_name)
+ key = content_type + '/' + data_hash + '/' + file_name
+ result = {key: memcache.delete(key)}
+ content_type = urllib.unquote(content_type)
+ if IMAGE_TYPES.match(content_type):
+ thumbnail_key = key + THUMB_SUFFIX
+ result[thumbnail_key] = memcache.delete(thumbnail_key)
+ if 'application/json' in self.request.headers.get('Accept'):
+ self.response.headers['Content-Type'] = 'application/json'
+ s = self.json_stringify(result)
+ self.response.write(s)
+
+app = webapp2.WSGIApplication(
+ [
+ ('/', UploadHandler),
+ ('/(.+)/([^/]+)/([^/]+)', FileHandler)
+ ],
+ debug=DEBUG
+)
fnp / redakcja.git / blobdiff