Modify blob upload API
- Ensures new uploads and resumed upload statuses always return an offset of 0. This allows future clients which support resumable upload to not attempt resumable upload on this version which does not support it. - Add PATCH support for streaming data on upload. - Add messaging to specification that PATCH with content range is currently not supported. - Update PUT blob to only support full data or no data, no more last chunk messaging as it was not supported. closes #470 Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
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Derek McGowan
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6 changed files with 404 additions and 83 deletions
186
docs/spec/api.md
186
docs/spec/api.md
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@ -123,6 +123,9 @@ specification to correspond with the versions enumerated here.
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<li>Deleting a manifest by tag has been deprecated.</li>
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<li>Specified `Docker-Content-Digest` header for appropriate entities.</li>
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<li>Added error code for unsupported operations.</li>
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<li>Added capability of doing streaming upload to PATCH blob upload.</li>
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<li>Updated PUT blob upload to no longer take final chunk, now requires entire data or no data.</li>
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<li>Removed 416 return code from PUT blob upload.</li>
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</ul>
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</dd>
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@ -2175,6 +2178,158 @@ The error codes that may be included in the response body are enumerated below:
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Upload a chunk of data for the specified upload.
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##### Stream upload
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```
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PATCH /v2/<name>/blobs/uploads/<uuid>
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Host: <registry host>
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Authorization: <scheme> <token>
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Content-Type: application/octet-stream
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<binary data>
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```
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Upload a stream of data to upload without completing the upload.
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The following parameters should be specified on the request:
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|Name|Kind|Description|
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|----|----|-----------|
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|`Host`|header|Standard HTTP Host Header. Should be set to the registry host.|
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|`Authorization`|header|An RFC7235 compliant authorization header.|
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|`name`|path|Name of the target repository.|
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|`uuid`|path|A uuid identifying the upload. This field can accept characters that match `[a-zA-Z0-9-_.=]+`.|
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###### On Success: Data Accepted
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```
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204 No Content
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Location: /v2/<name>/blobs/uploads/<uuid>
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Range: 0-<offset>
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Content-Length: 0
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Docker-Upload-UUID: <uuid>
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```
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The stream of data has been accepted and the current progress is available in the range header. The updated upload location is available in the `Location` header.
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The following headers will be returned with the response:
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|Name|Description|
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|----|-----------|
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|`Location`|The location of the upload. Clients should assume this changes after each request. Clients should use the contents verbatim to complete the upload, adding parameters where required.|
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|`Range`|Range indicating the current progress of the upload.|
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|`Content-Length`|The `Content-Length` header must be zero and the body must be empty.|
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|`Docker-Upload-UUID`|Identifies the docker upload uuid for the current request.|
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###### On Failure: Bad Request
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```
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400 Bad Request
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Content-Type: application/json; charset=utf-8
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{
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"errors:" [
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{
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"code": <error code>,
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"message": "<error message>",
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"detail": ...
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},
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...
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]
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}
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```
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There was an error processing the upload and it must be restarted.
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The error codes that may be included in the response body are enumerated below:
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|Code|Message|Description|
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-------|----|------|------------
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| `DIGEST_INVALID` | provided digest did not match uploaded content | When a blob is uploaded, the registry will check that the content matches the digest provided by the client. The error may include a detail structure with the key "digest", including the invalid digest string. This error may also be returned when a manifest includes an invalid layer digest. |
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| `NAME_INVALID` | invalid repository name | Invalid repository name encountered either during manifest validation or any API operation. |
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| `BLOB_UPLOAD_INVALID` | blob upload invalid | The blob upload encountered an error and can no longer proceed. |
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###### On Failure: Unauthorized
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```
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401 Unauthorized
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WWW-Authenticate: <scheme> realm="<realm>", ..."
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Content-Length: <length>
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Content-Type: application/json; charset=utf-8
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{
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"errors:" [
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{
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"code": "UNAUTHORIZED",
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"message": "access to the requested resource is not authorized",
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"detail": ...
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},
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...
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]
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}
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```
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The client does not have access to push to the repository.
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The following headers will be returned on the response:
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|Name|Description|
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|----|-----------|
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|`WWW-Authenticate`|An RFC7235 compliant authentication challenge header.|
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|`Content-Length`|Length of the JSON error response body.|
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The error codes that may be included in the response body are enumerated below:
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|Code|Message|Description|
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-------|----|------|------------
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| `UNAUTHORIZED` | access to the requested resource is not authorized | The access controller denied access for the operation on a resource. Often this will be accompanied by a 401 Unauthorized response status. |
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###### On Failure: Not Found
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```
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404 Not Found
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Content-Type: application/json; charset=utf-8
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{
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"errors:" [
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{
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"code": <error code>,
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"message": "<error message>",
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"detail": ...
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},
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...
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]
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}
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```
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The upload is unknown to the registry. The upload must be restarted.
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The error codes that may be included in the response body are enumerated below:
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|Code|Message|Description|
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-------|----|------|------------
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| `BLOB_UPLOAD_UNKNOWN` | blob upload unknown to registry | If a blob upload has been cancelled or was never started, this error code may be returned. |
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##### Chunked upload
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```
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PATCH /v2/<name>/blobs/uploads/<uuid>
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@ -2187,7 +2342,7 @@ Content-Type: application/octet-stream
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<binary chunk>
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```
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Upload a chunk of data to specified upload without completing the upload.
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Upload a chunk of data to specified upload without completing the upload. The data will be uploaded to the specified Content Range.
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The following parameters should be specified on the request:
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@ -2350,14 +2505,13 @@ Complete the upload specified by `uuid`, optionally appending the body as the fi
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PUT /v2/<name>/blobs/uploads/<uuid>?digest=<digest>
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Host: <registry host>
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Authorization: <scheme> <token>
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Content-Range: <start of range>-<end of range, inclusive>
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Content-Length: <length of chunk>
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Content-Length: <length of data>
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Content-Type: application/octet-stream
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<binary chunk>
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<binary data>
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```
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Complete the upload, providing the _final_ chunk of data, if necessary. This method may take a body with all the data. If the `Content-Range` header is specified, it may include the final chunk. A request without a body will just complete the upload with previously uploaded content.
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Complete the upload, providing all the data in the body, if necessary. A request without a body will just complete the upload with previously uploaded content.
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The following parameters should be specified on the request:
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@ -2366,8 +2520,7 @@ The following parameters should be specified on the request:
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|----|----|-----------|
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|`Host`|header|Standard HTTP Host Header. Should be set to the registry host.|
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|`Authorization`|header|An RFC7235 compliant authorization header.|
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|`Content-Range`|header|Range of bytes identifying the block of content represented by the body. Start must the end offset retrieved via status check plus one. Note that this is a non-standard use of the `Content-Range` header. May be omitted if no data is provided.|
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|`Content-Length`|header|Length of the chunk being uploaded, corresponding to the length of the request body. May be zero if no data is provided.|
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|`Content-Length`|header|Length of the data being uploaded, corresponding to the length of the request body. May be zero if no data is provided.|
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|`name`|path|Name of the target repository.|
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|`uuid`|path|A uuid identifying the upload. This field can accept characters that match `[a-zA-Z0-9-_.=]+`.|
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|`digest`|query|Digest of uploaded blob.|
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@ -2500,25 +2653,6 @@ The error codes that may be included in the response body are enumerated below:
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###### On Failure: Requested Range Not Satisfiable
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```
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416 Requested Range Not Satisfiable
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Location: /v2/<name>/blobs/uploads/<uuid>
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Range: 0-<offset>
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```
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The `Content-Range` specification cannot be accepted, either because it does not overlap with the current progress or it is invalid. The contents of the `Range` header may be used to resolve the condition.
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The following headers will be returned on the response:
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|Name|Description|
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|----|-----------|
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|`Location`|The location of the upload. Clients should assume this changes after each request. Clients should use the contents verbatim to complete the upload, adding parameters where required.|
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|`Range`|Range indicating the current progress of the upload.|
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#### DELETE Blob Upload
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