Amazon S3

1. Đăng kí: http://aws.amazon.com/

2. Download thu vien boto:

Vao Developer/Sample code & Libraries, search boto

http://aws.amazon.com/code/827?_encoding=UTF8&queryArg=searchQuery&x=0&fromSearch=1&y=0&searchPath=code&searchQuery=boto

3. Giai nen va chay lenh python setup.py install

4. Neu muon nhung code: copy thu muc boto vao source project

5. Introduction and sample: http://boto.cloudhackers.com/s3_tut.html,

api: http://boto.s3.amazonaws.com/ref/s3.html

6. Su dung boto voi Amazon S3, tren web2py:

record_create.html:

{{=form.custom.begin}}

input tyle="file" name="img" >

{{=form.custom.end}}

trong controllers cua web2py: record.py

from boto.s3.connection import S3Connection

from boto.s3.key import Key

...

def record_create

...

conn = S3Connection('aws_access_key', 'secret_key')

# rs = conn.get_all_buckets()

bucket = conn.get_bucket('myimg') # Trong TH nay bucket myimg da duoc tao san

if request.vars.has_key('img'):

img = request.vars['img']

if img.file:

#data = img.file.read()

k = Key(bucket)

k.key = 'Winter.jpg'

k.set_contents_from_file(img.file, headers=None, replace=True, cb=None, num_cb=10, policy=None, md5=None)

OK. That's all

Load anh truc tiep tu Amazon: (bucket phai duoc public)

http://bucket_name.s3.amazonaws.com/image_name?AWSAccessKeyId=aws_acesskey

Quan li % upload:

....

bucket = conn.create_bucket(bucket_name,
location=s3.connection.Location.DEFAULT)

testfile = "replace this with an actual filename"
print 'Uploading %s to Amazon S3 bucket %s' % \
(testfile, bucket_name)

import sys
def percent_cb(complete, total):
sys.stdout.write('.')
sys.stdout.flush()

from boto.s3.key import Key
k = Key(bucket)
k.key = 'my test file'
k.set_contents_from_filename(testfile, cb=percent_cb, num_cb=10)

Upload to S3

Here is the code we use to upload the picture files:

view source

print?

01	def push_picture_to_s3(id):

02

try:

03	import boto

04	from boto.s3.key import Key

05	# set boto lib debug to critical

06	logging.getLogger('boto').setLevel(logging.CRITICAL)

07	bucket_name = settings.BUCKET_NAME

08	# connect to the bucket

09	conn = boto.connect_s3(settings.AWS_ACCESS_KEY_ID,

10	settings.AWS_SECRET_ACCESS_KEY)

11	bucket = conn.get_bucket(bucket_name)

12	# go through each version of the file

13	key = '%s.png' % id

14	fn = '/var/www/data/%s.png' % id

15	# create a key to keep track of our file in the storage

16	k = Key(bucket)

17	k.key = key

18	k.set_contents_from_filename(fn)

19	# we need to make it public so it can be accessed publicly

20	# using a URL like http://s3.amazonaws.com/bucket_name/key

21	k.make_public()

22	# remove the file from the web server

23	os.remove(fn)

24

except:

25

... Download from S3 As you saw, you can access the file using the URL: http://s3.amazonaws.com/bucket_name/key but you can also use the boto library to download the files. I do that to create a daily backup of the bucket’s files on my local machine. Here is the script to do that: 01 import boto 02 import sys, os 03 from boto.s3.key import Key 04 05 LOCAL_PATH = '/backup/s3/' 06 AWS_ACCESS_KEY_ID = '...' 07 AWS_SECRET_ACCESS_KEY = '...' 08 09 bucket_name = 'bucket_name' 10 # connect to the bucket 11 conn = boto.connect_s3(AWS_ACCESS_KEY_ID, 12 AWS_SECRET_ACCESS_KEY) 13 bucket = conn.get_bucket(bucket_name) 14 # go through the list of files 15 bucket_list = bucket.list() 16 for l in bucket_list: 17 keyString = str(l.key) 18 # check if file exists locally, if not: download it 19 if not os.path.exists(LOCAL_PATH+keyString): 20 l.get_contents_to_filename(LOCAL_PATH+keyString) tags: Django, Python