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storage.py
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storage.py
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import webapp2
#from google.appengine.api import app_identity
from google.appengine.api import files, app_identity, memcache
from google.appengine.ext import blobstore, db
from google.appengine.ext.webapp import blobstore_handlers
import jinja2
import os
JINJA_ENVIRONMENT = jinja2.Environment(
loader=jinja2.FileSystemLoader(os.path.dirname(__file__)),
extensions=['jinja2.ext.autoescape'],
autoescape=True)
MEMCACHED_ENABLED=True
BUCKET = '/gs/cs536storageproject'
#BUCKET = '/gs/' + app_identity.get_default_gcs_bucket_name()
class MainPage(webapp2.RequestHandler):
def get(self):
#self.response.headers['Content-Type'] = 'text/html'
allobj = listing()
size = 0
count = 0
for f in allobj:
s = files.stat(BUCKET + '/' + f)
size += s.st_size
count += 1
template_values = {
'listing' : allobj,
'total_size': size,
'num_files': count
}
template = JINJA_ENVIRONMENT.get_template('index.html')
self.response.write(template.render(template_values))
#class FileUpload(blobstore_handlers.BlobstoreUploadHandler):
class FileUpload(webapp2.RequestHandler):
def get(self):
template = JINJA_ENVIRONMENT.get_template('upload.html')
self.response.write(template.render({'url' : '/upload'}))
def post(self):
filename = self.request.get('filename')
fileblob = self.request.get('fileToUpload')
print fileblob
if filename != "" and fileblob != None:
file_insert(filename, fileblob)
self.redirect('/')
class FileGet(webapp2.RequestHandler):
def get(self):
filename = self.request.get('name')
self.response.headers['Content-Type'] = 'text/text'
self.response.headers['Content-Disposition'] = 'Attatchment; filename='+str(filename)
content = find(filename)
self.response.write(content)
class FileInfo(webapp2.RequestHandler):
def get(self):
filename = self.request.get('name')
template_info = { 'file' : filename }
template = JINJA_ENVIRONMENT.get_template('fileinfo.html')
self.response.write(template.render(template_info))
class FileDelete(webapp2.RequestHandler):
def get(self):
filename = self.request.get('name')
self.response.headers['Content-Type'] = 'text/plain'
if check(filename):
remove(filename)
self.response.write("deleted %s" % filename)
else:
self.response.write("File does not exist")
class FileCheck(webapp2.RequestHandler):
def post(self):
filename = self.request.get('fname')
if check(filename):
self.response.write("File Exists")
else:
self.response.write("File Does Not Exist")
application = webapp2.WSGIApplication([
('/', MainPage),
('/upload',FileUpload),
('/read',FileGet),
('/check',FileCheck),
('/delete',FileDelete),
('/file',FileInfo),
], debug=True)
def file_insert(key, value):
FILEPATH = BUCKET + '/' + key
write_path = files.gs.create(FILEPATH, mime_type='text/plain',
acl='public-read')
# Write to the file.
with files.open(write_path, 'a') as fp:
fp.write(value)
# Finalize the file so it is readable in Google Cloud Storage.
files.finalize(write_path)
filemeta = files.stat(FILEPATH)
if (filemeta.st_size) < 100* 1024 and MEMCACHED_ENABLED: # cache small files
memcache.set(key, value)
def check(key):
path = BUCKET + '/' + key
if MEMCACHED_ENABLED:
response = memcache.get(key)
if response != None:
return True
try:
fh = files.open(path, 'r')
except files.ExistenceError:
return False
return True
def find(key):
if MEMCACHED_ENABLED:
response = memcache.get(key)
if response != None:
return response
response = ''
path = BUCKET + "/" + key
with files.open(path, 'r') as fp:
buf = fp.read(1000000)
while buf:
response += buf
buf = fp.read(1000000)
return response
def remove(key):
path = BUCKET + "/" + key
files.delete(path)
if MEMCACHED_ENABLED:
memcache.delete(key)
def listing():
filelist = files.listdir(BUCKET)
flist = []
for f in filelist:
pref, fname = f.split(BUCKET+'/')
flist.append(fname)
return flist