I am accessing S3 using signed URLs and Jets3t library. I have built a cipherStream over inputstream so that encryption also happens on the fly during upload.
Can I use multipart upload feature where file is divided into multiple parts and uploaded to S3 in parallel.
Does Jets3t provide any support to handle such case?
You can use the multi-threaded ThreadedS3Service class as your service object. It has a method multipartStartUploads(java.lang.String bucketName, java.util.List objects) that does exactly what I think you are asking for.
Related
I am using S3's Presigned Post to allow web clients to safely upload files to my S3 bucket. As you can see in the Ruby SDK initialize method, there are many things tat can be enforced in the Presign Post.
But, it seems like enforcing a specific Checksum is not possible. It would be ideal if I could ensure that the contents of the Presigned Post would match a particular SHA-1. Is this possible? Maybe there is a way to forgo the initialize constructor and manually build this requirement into the Presigned Post?
I have a versioning enabled bucket in GCS.
The application I'm working on uses the AWS S3 .NET SDK to connect to a S3-compatible object storage and has been working just fine for this use case.
Now we're also about to support GCS object storage. From my research and testing, GCS offers S3-compatibility through their XML-api. I've tested this and sure enough, GetObject/PutObject/multipart uploads/chunked downloads are all working fine with the code using the S3 library.
However, the compatibility seems to stop when I tried testing the versioning feature: our application makes heavy use of object storage versioned buckets, requesting non-current versions by their VersionID.
With the S3 library connecting to the S3 object storage, everything works fine: PutObject and multipart uploads (= CompleteMultipartUpload response) return the VersionID properly.
For GCS though, this does not return their version of a "VersionID" (= the object Generation).
Response looks like this:
I would have expected that GCS returns this Generation as the VersionID in these responses, since they are conceptually the same. But as you can see, VersionID is null (and the bucket is definitely versioning-enabled).
I would just write another implementation class that uses the GCS .NET SDK, but our application heavily relies on chunked uploading where we retrieve a chunk of data from an external source one by one (so we don't have the full Stream of data). This works well with S3's multipart upload (each chunk is uploaded in a separate UploadPart call), but GCS resumable upload expects a Stream that just has all the data right away. So it looks like we really need multipart upload functionality, that we can use through the S3 library with GCS's XML API. If anyone has suggestions on how to make this work with GCS whereby we can upload chunk per chunk in separate calls to construct an object like multipart upload, would also be greatly appreciated.
So my questions are: will receiving the VersionID after uploading just not work with the AWS S3 SDK to Google Cloud Storage or am I doing it wrong? Do I have to look elsewhere in the response for it? Configure some setting to get this properly returned?
But is a bit of a random question and no one should ever do it this way, but is it possible to execute a put api call to amazon S3 from the web browser? Using only query params.
For instance, ignoring authentication params, I know you can do https://s3.amazonaws.com/~some bucket~
To list files in the bucket. Is there a way to upload?
Have look at Browser-Based Uploads Using POST
I am developing a website in HTML, javascript & jQuery. I want to upload (multiple images) to amazon s3 server in an ajax request. There is no such SDK to integrate s3 in Javascript. A PHP SDK is available, but it is not useful to me. Can anybody provide solution to this in javascript?
You can read the article - How to Upload Scanned Images to Amazon S3 Using Dynamic Web TWAIN, which introduces how to use PHP and JavaScript to upload files to Amazon S3. Key steps include:
Specify the bucket which is the place or the folder name used for
storing data on Amazon S3
Specify the Access Key and Secret Key you
obtained from your Amazon S3 account
Create a policy that specifies
what you permit and what you don’t permit for the data uploaded from a
client web page
Encode and encrypt these policies and signatures to
keep them confidential, and store the encoded and encrypted values in
the hidden input elements.
I am attempting to use an S3 bucket as a deployment location for an internal, auto-updating application's files. It would be the location where the new version's files are dumped for the application to puck up on an update. Since this is an internal application, I was hoping to have the URL be private, but to be able to access it using only a URL. I was hoping to look into using third party auto updating software, which means I can't use the Amazon API to access it.
Does anyone know a way to get a URL to a private bucket on S3?
You probably want to use one of the available AWS Software Development Kits (SDKs), which all implement the respective methods to generate these URLs by means of the GetPreSignedURL() method (e.g. Java: generatePresignedUrl(), C#: GetPreSignedURL()):
The GetPreSignedURL operations creates a signed http request. Query
string authentication is useful for giving HTTP or browser access to
resources that would normally require authentication. When using query
string authentication, you create a query, specify an expiration time
for the query, sign it with your signature, place the data in an HTTP
request, and distribute the request to a user or embed the request in
a web page. A PreSigned URL can be generated for GET, PUT and HEAD
operations on your bucket, keys, and versions.
There are a couple of related questions already and e.g. Why is my S3 pre-signed request invalid when I set a response header override that contains a “+”? contains a working sample in C# (aside from the content type issue Ragesh is experiencing of course).
Good luck!