github/jgit - jgit - 帆软第三方插件仓库

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Author	SHA1	Message	Date
Matthias Sohn	f496177a37	Support Amazon S3 based storage for LFS Add a storage implementation storing large objects in Amazon S3. The AmazonS3Repository pre-signs download and upload requests. AWS access and secret key are expected to be in the $HOME/.aws/credentials file in the following format: [default] accessKey = ... secretKey = ... Use AWS version 4 request signing [1] because it is more secure and supported by all regions. The version 3 signing is not supported in newer regions. In follow up changes we should: - implement getVerifyAction() and do actual verification. Subclasses of S3Repository can implement caching for object meta data (size) in order to avoid extra roundtrips to S3. Verification should ensure that meta data store and content of S3 storage are in sync - HEAD request used in S3Repository.getSize() seems to always return Content-length 0 in contrast to the documentation [2]. So getSize() does detect if the object exists in S3 or not but in case the object exists it always returns size 0 [1] http://docs.aws.amazon.com/general/latest/gr/signature-version-4.html [2] https://forums.aws.amazon.com/thread.jspa?threadID=223616 Change-Id: Ic47f094928a259e5264c92b3aacf6d90210907a8 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com> Signed-off-by: Sasa Zivkov <sasa.zivkov@sap.com>	9 years ago
Matthias Sohn	3bae524f6f	Support LFS protocol and a file system based LFS storage Implement LfsProtocolServlet handling the "Git LFS v1 Batch API" protocol [1]. Add a simple file system based LFS content store and the debug-lfs-store command to simplify testing. Introduce a LargeFileRepository interface to enable additional storage implementation while reusing the same protocol implementation. At the client side we have to configure the lfs.url, specify that we use the batch API and we don't use authentication: [lfs] url = http://host:port/lfs batch = true [lfs "http://host:port/lfs"] access = none the git-lfs client appends the "objects/batch" to the lfs.url. Hard code an Authorization header in the FileLfsRepository.getAction because then git-lfs client will skip asking for credentials. It will just forward the Authorization header from the response to the download/upload request. The FileLfsServlet supports file content storage for "Large File Storage" (LFS) server as defined by the Github LFS API [2]. - upload and download of large files is probably network bound hence use an asynchronous servlet for good scalability - simple object storage in file system with 2 level fan-out - use LockFile to protect writing large objects against multiple concurrent uploads of the same object - to prevent corrupt uploads the uploaded file is rejected if its hash doesn't match id given in URL The debug-lfs-store command is used to run the LfsProtocolServlet and, optionally, the FileLfsServlet which makes it easier to setup a local test server. [1] https://github.com/github/git-lfs/blob/master/docs/api/http-v1-batch.md [2] https://github.com/github/git-lfs/tree/master/docs/api Bug: 472961 Change-Id: I7378da5575159d2195138d799704880c5c82d5f3 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com> Signed-off-by: Sasa Zivkov <sasa.zivkov@sap.com>	9 years ago

Author

SHA1

Message

Date

Matthias Sohn

f496177a37

Support Amazon S3 based storage for LFS

Add a storage implementation storing large objects in Amazon S3.
The AmazonS3Repository pre-signs download and upload requests.

AWS access and secret key are expected to be in the
$HOME/.aws/credentials file in the following format:

[default]
  accessKey = ...
  secretKey = ...

Use AWS version 4 request signing [1] because it is more secure and
supported by all regions. The version 3 signing is not supported in
newer regions.

In follow up changes we should:

- implement getVerifyAction() and do actual verification. Subclasses of
S3Repository can implement caching for object meta data (size) in order
to avoid extra roundtrips to S3. Verification should ensure that meta
data store and content of S3 storage are in sync

- HEAD request used in S3Repository.getSize() seems to always return
Content-length 0 in contrast to the documentation [2]. So getSize() does
detect if the object exists in S3 or not but in case the object exists
it always returns size 0

[1] http://docs.aws.amazon.com/general/latest/gr/signature-version-4.html
[2] https://forums.aws.amazon.com/thread.jspa?threadID=223616

Change-Id: Ic47f094928a259e5264c92b3aacf6d90210907a8
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Signed-off-by: Sasa Zivkov <sasa.zivkov@sap.com>

9 years ago

Matthias Sohn

3bae524f6f

Support LFS protocol and a file system based LFS storage

Implement LfsProtocolServlet handling the "Git LFS v1 Batch API"
protocol [1]. Add a simple file system based LFS content store and the
debug-lfs-store command to simplify testing.

Introduce a LargeFileRepository interface to enable additional storage
implementation while reusing the same protocol implementation.

At the client side we have to configure the lfs.url, specify that
we use the batch API and we don't use authentication:

  [lfs]
	  url = http://host:port/lfs
	  batch = true
  [lfs "http://host:port/lfs"]
	  access = none

the git-lfs client appends the "objects/batch" to the lfs.url.

Hard code an Authorization header in the FileLfsRepository.getAction
because then git-lfs client will skip asking for credentials. It will
just forward the Authorization header from the response to the
download/upload request.

The FileLfsServlet supports file content storage for "Large File
Storage" (LFS) server as defined by the Github LFS API [2].

- upload and download of large files is probably network bound hence use
  an asynchronous servlet for good scalability
- simple object storage in file system with 2 level fan-out
- use LockFile to protect writing large objects against multiple
  concurrent uploads of the same object
- to prevent corrupt uploads the uploaded file is rejected if its hash
  doesn't match id given in URL

The debug-lfs-store command is used to run the LfsProtocolServlet and,
optionally, the FileLfsServlet which makes it easier to setup a
local test server.

[1]
https://github.com/github/git-lfs/blob/master/docs/api/http-v1-batch.md
[2] https://github.com/github/git-lfs/tree/master/docs/api

Bug: 472961
Change-Id: I7378da5575159d2195138d799704880c5c82d5f3
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Signed-off-by: Sasa Zivkov <sasa.zivkov@sap.com>

9 years ago

2 Commits (be8c525fa0664d429e23cbf070420cb84a4a1607)