What does S3 stand for in AWS?
The AWS SDK for Java is a collection of tools for developers creating Java-based Web apps to run on Amazon cloud components such as Amazon Simple Storage Service (S3), Amazon Elastic Compute Cloud (EC2) and Amazon SimpleDB.
How to easily host a web site on AWS S3?
Step 2: Enable static website hosting
- Sign in to the AWS Management Console and open the Amazon S3 console at https://console.aws.amazon.com/s3/ .
- In the Buckets list, choose the name of the bucket that you want to enable static website hosting for.
- Choose Properties .
- Under Static website hosting, choose Edit .
- Choose Use this bucket to host a website.
How to log access to AWS S3 bucket and website?
- Access bucket objects or S3 website. ...
- Go to the bucket that you've configured as the target to store the logs.
- Download the generated log files. ...
- View the log files using your favorite text viewer or edit. ...
How to get access to AWS S3 bucket?
- Using the IAM user sign-in link (see To provide a sign-in link for IAM users ), sign in to the AWS Management Console.
- Open the Amazon S3 console at https://console.aws.amazon.com/s3/ .
- On the Amazon S3 console, verify that Alice can see the list of objects in the Development/ folder in the bucket. ...
What is the difference between a key and a value in an S3 tag?
A tag key can be up to 128 Unicode characters in length and tag values can be up to 256 Unicode characters in length. Key and tag values are case sensitive.
Does S3 store MD5?
When you use PutObject to upload objects to Amazon S3, pass the Content-MD5 value as a request header. Amazon S3 checks the object against the provided Content-MD5 value. If the values do not match, you receive an error. The Content-MD5 request header can also be used with the S3 UploadPart API.
What is S3 URI used for?
If you access a bucket programmatically, Amazon S3 supports RESTful architecture in which your buckets and objects are resources, each with a resource URI that uniquely identifies the resource. Amazon S3 supports both virtual-hosted–style and path-style URLs to access a bucket.
Why does S3 have access point?
S3 Access Points simplify how you manage data access for your application set to your shared data sets on S3. You no longer have to manage a single, complex bucket policy with hundreds of different permission rules that need to be written, read, tracked, and audited.
What is checksum in S3?
Amazon S3 uses checksum values to verify the integrity of data that you upload to or download from Amazon S3. In addition, you can request that another checksum value be calculated for any object that you store in Amazon S3.
What is MD5 in AWS?
The MD5 function returns a 32-character string that is a text representation of the hexadecimal value of a 128-bit checksum.
What is a URI vs URL?
URL is used to describe the identity of an item. URI provides a technique for defining the identity of an item. URL links a web page, a component of a web page or a program on a web page with the help of accessing methods like protocols. URI is used to distinguish one resource from other regardless of the method used.
What is my S3 bucket URL?
An S3 bucket can be accessed through its URL. The URL format of a bucket is either of two options: http://s3.amazonaws.com/[bucket_name]/ http://[bucket_name].s3.amazonaws.com/
Where is S3 bucket URI?
Navigate to the AWS S3 console and click on your bucket's name. Use the search input to find the object if necessary. Click on the checkbox next to the object's name. Click on the Copy URL button.
What is Bucket access point?
Access points are named network endpoints that are attached to buckets that you can use to perform S3 object operations, such as GetObject and PutObject . Each access point has distinct permissions and network controls that S3 applies for any request that is made through that access point.
Is S3 available on Outpost?
Amazon S3 on Outposts delivers object storage to your on-premises AWS Outposts environment to meet local data processing and data residency needs. Using the S3 APIs and features, S3 on Outposts makes it easy to store, secure, tag, retrieve, report on, and control access to the data on your Outpost.
What is S3 batch operations?
S3 Batch Operations is a managed solution for performing storage actions like copying and tagging objects at scale, whether for one-time tasks or for recurring, batch workloads. S3 Batch Operations can perform actions across billions of objects and petabytes of data with a single request.
What is content MD5 header?
Synopsis. The Content-MD5 header is used by servers to provide a message-integrity check for the message body. Only an origin server or requesting client should insert a Content-MD5 header in the message. The value of the header is an MD5 digest of the (potentially encoded) message body.
Which of the following is held as metadata in an S3 object?
For each object stored in a bucket, Amazon S3 maintains a set of system metadata. Amazon S3 processes this system metadata as needed. For example, Amazon S3 maintains object creation date and size metadata and uses this information as part of object management.
What is the use of MD5 checksum?
MD5 (message-digest algorithm) is a cryptographic protocol used for authenticating messages as well as content verification and digital signatures. MD5 is based on a hash function that verifies that a file you sent matches the file received by the person you sent it to.
What is object name in S3 bucket?
The object key (or key name) uniquely identifies the object in an Amazon S3 bucket. Object metadata is a set of name-value pairs. For more information about object metadata, see Working with object metadata. When you create an object, you specify the key name, which uniquely identifies the object in the bucket.
What is an ETag on Amazon S3?
Files uploaded to Amazon S3 that are smaller than 5GB have an ETag that is simply the MD5 hash of the file , which makes it easy to check if your local files are the same as what you put on S3. But if your file is larger than 5GB, then Amazon computes the ETag differently. For example, I did a multipart upload of a 5,970,150,664 byte file in 380 ...
How many parts are in an etag?
And now append "-3" to get the ETag, since there were 3 parts.
Can you infer anything about the content from an etag?
No. And I don't expect this will even be possible - being able to infer anythingabout the content from the etag itself would run contrary to the goal of encryption in the first place, and if known payload would predictably reproduce the same etag then this would be an information leak.
Can you return the same ETag for a changed resource?
Good point. According to the HTTP spec, the ETag is completely up to their discretion, the only guarantee is that they can't return the same ETag for a changed resource. I'm guessing there's not much advantage to changing the algorithm though.
Short description
Follow these steps to verify the integrity of uploaded objects using the Content-MD5 header:
Calculate the Content-MD5 value of the object
Important: Microsoft File Checksum Integrity Verifier (FCIV) utility is an unsupported command-line utility that computes MD5 cryptographic hashes for files. FCIV runs on Windows 2000, Windows XP, and Windows Server 2003.
Verify the integrity of the uploaded object
When you use PutObject to upload objects to Amazon S3, pass the Content-MD5 value as a request header. Amazon S3 checks the object against the provided Content-MD5 value. If the values do not match, you receive an error.
