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Tristan Burgess bcdf3bb643 50342: Establish '406 Not Acceptable' response for protobuf serialization 'errNotMarshalable'

- Added metav1.Status() that enforces '406 Not Acceptable' response if
    protobuf serialization is not fully supported for the API resource type.
     - JSON and YAML serialization are supposed to be more completely baked
    in, so serialization involving those, and general errors with seralizing
    protobuf, will return '500 Internal Server Error'.
	- If serialization failure occurs and original HTTP status code is
    error, use the original status code, else use the serialization failure
    status code.
     - Write encoded API responses to intermediate buffer
     - Use apimachinery/runtime::Encode() instead of
    apimachinery/runtime/protocol::Encode() in
    apiserver/endpoints/handlers/responsewriters/writers::SerializeObject()
     - This allows for intended encoder error handling to fully work, facilitated by
    apiserver/endpoints/handlers/responsewriters/status::ErrorToAPIResponse() before officially
    writing to the http.ResponseWriter
     - The specific part that wasn't working by ErrorToAPIResponse() was the
    HTTP status code set. A direct call to
    http.ResponseWriter::WriteHeader(statusCode) was made in
    SerializeObject() with the original response status code, before
    performing the encode. Once this
    method is called, it can not again update the status code at a later
    time, with say, an erro status code due to encode failure.
     - Updated relevant apiserver unit test to reflect the new behavior
    (TestWriteJSONDecodeError())
     - Add build deps from make update for protobuf serializer

50342: Code review suggestion impl
 - Ensure that http.ResponseWriter::Header().Set() is called before http.ResponseWriter::WriteHeader()
    - This will avert a potential issue where changing the response media type to text/plain wouldn't work.
    - We want to respond with plain text if serialization fails of the original response, and serialization also fails for the resultant error response.

50342: wrapper for http.ResponseWriter
  - Prevent potential performance regression caused by modifying encode to use a buffer instead of streaming
    - This is achieved by creating a wrapper type for http.ResponseWriter that will use WriteHeader(statusCode) on the first
    call to Write(). Thus, on encode success, Write() will write the original statusCode. On encode failure, we pass control
    onto responsewriters::errSerializationFatal(), which will process the error to obtain potentially a new status code, depending
    on whether or not the original status code was itself an error.

50342: code review suggestions
  - Remove historical note from unit test comment
  - Don't export httpResponseWriterWithInit type (for now)

2018-08-17 16:21:07 -04:00

src

50342: Establish '406 Not Acceptable' response for protobuf serialization 'errNotMarshalable'

2018-08-17 16:21:07 -04:00

BUILD

Run hack/update-bazel.sh

2018-06-22 16:22:57 -07:00

OWNERS

…

README.md

Add link to k8s.io/sample-controller

2017-10-19 15:46:36 +01:00

README.md

External Repository Staging Area

This directory is the staging area for packages that have been split to their own repository. The content here will be periodically published to respective top-level k8s.io repositories.

Repositories currently staged here:

The code in the staging/ directory is authoritative, i.e. the only copy of the code. You can directly modify such code.

Using staged repositories from Kubernetes code

Kubernetes code uses the repositories in this directory via symlinks in the vendor/k8s.io directory into this staging area. For example, when Kubernetes code imports a package from the k8s.io/client-go repository, that import is resolved to staging/src/k8s.io/client-go relative to the project root:

// pkg/example/some_code.go
package example

import (
  "k8s.io/client-go/dynamic" // resolves to staging/src/k8s.io/client-go/dynamic
)

Once the change-over to external repositories is complete, these repositories will actually be vendored from k8s.io/<package-name>.