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.. _csharp:
C# S3 Examples
==============
Creating a Connection
---------------------
This creates a connection so that you can interact with the server.
.. code-block:: csharp
using System;
using Amazon;
using Amazon.S3;
using Amazon.S3.Model;
string accessKey = "put your access key here!";
string secretKey = "put your secret key here!";
AmazonS3Config config = new AmazonS3Config();
config.ServiceURL = "objects.dreamhost.com";
AmazonS3Client s3Client = new AmazonS3Client(
accessKey,
secretKey,
config
);
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:: csharp
ListBucketsResponse response = client.ListBuckets();
foreach (S3Bucket b in response.Buckets)
{
Console.WriteLine("{0}\t{1}", b.BucketName, b.CreationDate);
}
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:: csharp
PutBucketRequest request = new PutBucketRequest();
request.BucketName = "my-new-bucket";
client.PutBucket(request);
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:: csharp
ListObjectsRequest request = new ListObjectsRequest();
request.BucketName = "my-new-bucket";
ListObjectsResponse response = client.ListObjects(request);
foreach (S3Object o in response.S3Objects)
{
Console.WriteLine("{0}\t{1}\t{2}", o.Key, o.Size, o.LastModified);
}
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:: csharp
DeleteBucketRequest request = new DeleteBucketRequest();
request.BucketName = "my-new-bucket";
client.DeleteBucket(request);
Forced Delete for Non-empty Buckets
-----------------------------------
.. attention::
not available
Creating an Object
------------------
This creates a file ``hello.txt`` with the string ``"Hello World!"``
.. code-block:: csharp
PutObjectRequest request = new PutObjectRequest();
request.BucketName = "my-new-bucket";
request.Key = "hello.txt";
request.ContentType = "text/plain";
request.ContentBody = "Hello World!";
client.PutObject(request);
Change an Object's ACL
----------------------
This makes the object ``hello.txt`` to be publicly readable, and
``secret_plans.txt`` to be private.
.. code-block:: csharp
PutACLRequest request = new PutACLRequest();
request.BucketName = "my-new-bucket";
request.Key = "hello.txt";
request.CannedACL = S3CannedACL.PublicRead;
client.PutACL(request);
PutACLRequest request2 = new PutACLRequest();
request2.BucketName = "my-new-bucket";
request2.Key = "secret_plans.txt";
request2.CannedACL = S3CannedACL.Private;
client.PutACL(request2);
Download an Object (to a file)
------------------------------
This downloads the object ``perl_poetry.pdf`` and saves it in
``C:\Users\larry\Documents``
.. code-block:: csharp
GetObjectRequest request = new GetObjectRequest();
request.BucketName = "my-new-bucket";
request.Key = "perl_poetry.pdf";
GetObjectResponse response = client.GetObject(request);
response.WriteResponseStreamToFile("C:\\Users\\larry\\Documents\\perl_poetry.pdf");
Delete an Object
----------------
This deletes the object ``goodbye.txt``
.. code-block:: csharp
DeleteObjectRequest request = new DeleteObjectRequest();
request.BucketName = "my-new-bucket";
request.Key = "goodbye.txt";
client.DeleteObject(request);
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).
.. note::
The C# S3 Library does not have a method for generating unsigned
URLs, so the following example only shows generating signed URLs.
.. code-block:: csharp
GetPreSignedUrlRequest request = new GetPreSignedUrlRequest();
request.BucketName = "my-bucket-name";
request.Key = "secret_plans.txt";
request.Expires = DateTime.Now.AddHours(1);
request.Protocol = Protocol.HTTP;
string url = client.GetPreSignedURL(request);
Console.WriteLine(url);
The output of this will look something like::
http://objects.dreamhost.com/my-bucket-name/secret_plans.txt?Signature=XXXXXXXXXXXXXXXXXXXXXXXXXXX&Expires=1316027075&AWSAccessKeyId=XXXXXXXXXXXXXXXXXXX
|
