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.. _python:
Python S3 Examples
==================
Creating a Connection
---------------------
This creates a connection so that you can interact with the server.
.. code-block:: python
import boto
import boto.s3.connection
access_key = 'put your access key here!'
secret_key = 'put your secret key here!'
conn = boto.connect_s3(
aws_access_key_id = access_key,
aws_secret_access_key = secret_key,
host = 'objects.dreamhost.com',
calling_format = boto.s3.connection.OrdinaryCallingFormat(),
)
Listing Owned Buckets
---------------------
This gets a list of Buckets that you own.
This also prints out the bucket name and creation date of each bucket.
.. code-block:: python
for bucket in conn.get_all_buckets():
print "{name}\t{created}".format(
name = bucket.name,
created = bucket.creation_date,
)
The output will look something like this::
mahbuckat1 2011-04-21T18:05:39.000Z
mahbuckat2 2011-04-21T18:05:48.000Z
mahbuckat3 2011-04-21T18:07:18.000Z
Creating a Bucket
-----------------
This creates a new bucket called ``my-new-bucket``
.. code-block:: python
bucket = conn.create_bucket('my-new-bucket')
Listing a Bucket's Content
--------------------------
This gets a list of objects in the bucket.
This also prints out each object's name, the file size, and last
modified date.
.. code-block:: python
for key in bucket.list():
print "{name}\t{size}\t{modified}".format(
name = key.name,
size = key.size,
modified = key.last_modified,
)
The output will look something like this::
myphoto1.jpg 251262 2011-08-08T21:35:48.000Z
myphoto2.jpg 262518 2011-08-08T21:38:01.000Z
Deleting a Bucket
-----------------
.. note::
The Bucket must be empty! Otherwise it won't work!
.. code-block:: python
conn.delete_bucket(bucket.name)
Forced Delete for Non-empty Buckets
-----------------------------------
.. attention::
not available in python
Creating an Object
------------------
This creates a file ``hello.txt`` with the string ``"Hello World!"``
.. code-block:: python
key = bucket.new_key('hello.txt')
key.set_contents_from_string('Hello World!')
Change an Object's ACL
----------------------
This makes the object ``hello.txt`` to be publicly readable, and
``secret_plans.txt`` to be private.
.. code-block:: python
hello_key = bucket.get_key('hello.txt')
hello_key.set_canned_acl('public-read')
plans_key = bucket.get_key('secret_plans.txt')
plans_key.set_canned_acl('private')
Download an Object (to a file)
------------------------------
This downloads the object ``perl_poetry.pdf`` and saves it in
``/home/larry/documents/``
.. code-block:: python
key = bucket.get_key('perl_poetry.pdf')
key.get_contents_to_filename('/home/larry/documents/perl_poetry.pdf')
Delete an Object
----------------
This deletes the object ``goodbye.txt``
.. code-block:: python
bucket.delete_key('goodbye.txt')
Generate Object Download URLs (signed and unsigned)
---------------------------------------------------
This generates an unsigned download URL for ``hello.txt``. This works
because we made ``hello.txt`` public by setting the ACL above.
This then generates a signed download URL for ``secret_plans.txt`` that
will work for 1 hour. Signed download URLs will work for the time
period even if the object is private (when the time period is up, the
URL will stop working).
.. code-block:: python
hello_key = bucket.get_key('hello.txt')
hello_url = hello_key.generate_url(0, query_auth=False, force_http=True)
print hello_url
plans_key = bucket.get_key('secret_plans.txt')
plans_url = plans_key.generate_url(3600, query_auth=True, force_http=True)
print plans_url
The output of this will look something like::
http://objects.dreamhost.com/my-bucket-name/hello.txt
http://objects.dreamhost.com/my-bucket-name/secret_plans.txt?Signature=XXXXXXXXXXXXXXXXXXXXXXXXXXX&Expires=1316027075&AWSAccessKeyId=XXXXXXXXXXXXXXXXXXX
|
