1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245

246
247
248
249
250
251

## Copyright 2008 Google Inc.
## 
## Licensed under the Apache License, Version 2.0 (the "License");
## you may not use this file except in compliance with the License.
## You may obtain a copy of the License at
## 
##     http://www.apache.org/licenses/LICENSE-2.0
## 
## Unless required by applicable law or agreed to in writing, software
## distributed under the License is distributed on an "AS IS" BASIS,
## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
## See the License for the specific language governing permissions and
## limitations under the License.  
## 
## @author Brad Neuberg (http://codinginparadise.org) 

import os
import cgi
import re
import time
import datetime

from google.appengine.api import users
from google.appengine.ext import webapp
from google.appengine.ext import db
from google.appengine.ext.webapp.util import login_required
from google.appengine.ext.webapp import template
from google.appengine.ext.webapp.util import run_wsgi_app

class Movie(db.Model):
	owner = db.UserProperty()
	filename = db.StringProperty()
	intermediate_data = db.StringProperty(default=None)
	blob = db.BlobProperty(default=None)
	length = db.IntegerProperty(default=None)
	bytes_uploaded = db.IntegerProperty(default=0)
	uploaded = db.BooleanProperty(default=False)
	geoAddress = db.StringProperty(default=None)
	datetime = db.DateTimeProperty(auto_now_add=True)

class MainPage(webapp.RequestHandler):
	@login_required
	def get(self):
		user = users.get_current_user()

		template_values = {
			'user': user,
			'logout_url': users.create_logout_url(self.request.uri)
		}
		
		path = os.path.join(os.path.dirname(__file__), 'index.html')
		self.response.out.write(template.render(path, template_values))

class Upload(webapp.RequestHandler):
	# Google App Engine currently has a 1 MB limit on requests, responses,
  # and Data Store puts()	
	
	#MAX_FILE_SIZE = 20000000 		# ~20 MBs - max size of a file that can be uploaded
	#TOTAL_QUOTA = 50000000			# ~50 MBs - total quota for movies for a user
	
	MAX_FILE_SIZE = 1000000 		# 1 MB - max size of a file that can be uploaded
	TOTAL_QUOTA = 5000000				# 5 MBs - total quota for movies for a user
	
	def post(self):
		user = users.get_current_user()

		if not user:
			self.redirect(users.create_login_url(self.request.uri))
			
		# Cleanup any old movies that have timed out from all users
		self.cleanup()

		filename = self.request.headers['Content-Disposition']
		filename = re.search('^attachment; filename=\"([^\"]*)\"$', filename).groups()[0]

		# Get what byte range we are dealing with
		byteRange = self.request.headers['Content-Range']
		matches = re.search('^bytes ([^\-]*)\-([^\/]*)\/(.*)$', byteRange)
		start = long(matches.group(1))
		end = long(matches.group(2))
		total = long(matches.group(3))
		
		# Get any location information
		geoAddress = None
		if self.request.get('geoAddress') != '':
			geoAddress = self.request.get('geoAddress')

		# Delete old completed entries that match this filename
		query = Movie.gql('WHERE filename = :1 AND owner = :2', filename, user) 
		m = None
		if query.count() > 0:
			m = query[0]
			if m.length != None and m.bytes_uploaded != None and m.length == m.bytes_uploaded:
				db.delete(query)
				m = Movie(owner=user, filename=filename)

		# Get old partially uploaded data already saved
		query = Movie.gql('WHERE filename = :1 AND owner = :2 LIMIT 1', filename, user)
		if query.count() == 1:
			m = query[0]
			
		# Will uploading this full file put the user over their quota?
		quotaUsed = total
		for entry in Movie.gql('WHERE owner = :1', user):
			if entry.filename != filename:
				quotaUsed += entry.length
		if quotaUsed >= self.TOTAL_QUOTA:
			self.error(413) # 413 = Request Too Large
			return

		# If we are just starting, create an entry; else if
		# there is nothing in the database and we _aren't_
		# the first range chunk, return an error
		if m == None and start == 0:
			m = Movie(owner=user, filename=filename)
		elif m == None and start > 0:
			self.error(500)					
			return

		# If there is something in the db, but our chunk is earlier than that
		# delete what is in the db
		if m != None and m.bytes_uploaded != 0 and start < m.bytes_uploaded:
			m.delete()
			m = Movie(owner=user, filename=filename)

		# Update Movie with new range and geographic information
		if m.blob != None:
			m.blob = db.Blob(m.blob + self.request.body)
		else:
			m.blob = db.Blob(self.request.body)
		m.length = total
		m.bytes_uploaded = end + 1
		m.geoAddress = geoAddress
		if m.bytes_uploaded == m.length:
			m.uploaded = True
		m.put()
		
		# Look at our total length so far for this file; if its greater than 
		# ~20 megabytes reject and delete this movie
		if m.bytes_uploaded > self.MAX_FILE_SIZE:
			m.delete()
			self.error(413) # 413 = Request Too Large
			return
		
		self.response.headers['Content-Type'] = 'text/plain'
		self.response.out.write('200 OK')
		
	def cleanup(self):
		# Get all movies that are finished uploading and are more than
		# 30 minutes old (30 minutes * 60 seconds = 1800)
		movies = Movie.gql('WHERE uploaded = TRUE')
		now = datetime.datetime.now()
		threshold = datetime.timedelta(minutes=30)
		self.response.headers['Content-Type'] = 'text/plain'
		for m in movies:
				diff = now - m.datetime
				self.response.out.write(diff.seconds)
				if diff >= threshold:
					m.delete()

class MovieView(webapp.RequestHandler):
	@login_required
	def get(self):
		filename = self.request.get('filename');	
		user = users.get_current_user()
		query = Movie.gql('WHERE filename = :1 AND owner = :2', filename, user)
		
		if query.count() == 0:
			self.error(404)
			return
		else:
			blob = query[0].blob
			
			mimeType = None
			filename = filename.lower()
			if filename.find('.qt') != -1 or filename.find('.mov') != -1:
				mimeType = 'video/quicktime'
			elif filename.find('.wmv') != -1:
				mimeType = 'video/x-ms-wmv'
			elif filename.find('.avi') != -1:
				mimeType = 'video/avi'
				
			if mimeType == None:
				self.error(500)
				return
				
			self.response.headers['Content-Type'] = mimeType
			self.response.out.write(blob)
			
class ListMovies(webapp.RequestHandler):
	@login_required
	def get(self):
		user = users.get_current_user()
		query = Movie.gql('WHERE owner = :1', user)
		
		results = '[\n';
		
		if query.count() != 0:
			for i, movie in enumerate(query):
				geoAddress = 'null'
				if movie.geoAddress != None:
					geoAddress = '"' + movie.geoAddress + '"'
					
				entry = '\t{\n'
				entry += '\t\tfilename: "' + movie.filename + '", \n'
				uploaded = True
				if movie.bytes_uploaded < movie.length:
					uploaded = False
				entry += '\t\tuploaded: ' + str(uploaded).lower() + ', \n'
				entry += '\t\tlength: ' + str(movie.length) + ', \n'
				entry += '\t\tblob: null, \n'
				entry += '\t\tbytesUploaded: ' + str(movie.bytes_uploaded) + ', \n'
				entry += '\t\tgeoAddress: ' + geoAddress + ', \n'
				entry += '\t\tuploadRetries: 0\n'
				entry += '\t}'
				
				if i != (query.count() - 1):
					entry += ', \n\n'
				else:
					entry += '\n'
				
				results += entry
		results += ']\n'
			
		self.response.headers['Content-Type'] = 'text/javascript'
		self.response.out.write(results)
		
class ClearMovies(webapp.RequestHandler):
	@login_required
	def get(self):
		user = users.get_current_user()
		query = Movie.gql('WHERE owner = :1', user)
		for movie in query.fetch(100):
			movie.delete()
		
		self.response.headers['Content-Type'] = 'text/plain'
		self.response.out.write('200 OK')
		
application = webapp.WSGIApplication(
																		 [('/', MainPage),
																			('/upload', Upload),
																			('/view', MovieView),
																			('/list', ListMovies),
																			('/clear', ClearMovies)],
																		 debug=True)

def main():
	run_wsgi_app(application)

if __name__ == "__main__":
	main()