* EaR: REST based Simulated KMS Vault request hanlder interface
Description
diff-1: Address review comments
Improve unit test case coverage
diff-2: Extend RESTKmsConnectorUtil to generate HTTP::Header
EaR simulation testing is currently driven using SimKmsConnector
interface, it exposes endpoints directly invoked by EKP to fetch
encryption keys. Approach avoids testing RESTKms communication
path. Recently FDB codebase got extended by adding HTTPServer
interface, which was a gap prohibiting end-to-end testing of
EaR code.
Patch proposes following changes:
1. Refactor RESTKmsConnector to move common code and definitions
to RESTKmsConnectorUtil namespace
2. Introduce RESTSimKmsVault accepting HTTP format requests and
providing appropriate HTTP response.
Testing
RESTUnit 100K + 5k valgrind
devRunCorrectness 100K
Testing
* Passes existing tests
* adding http unit test for wrong md5 sum
* Added new HTTPKeyValueStore workload to test long-running http clients
* fixing warnings
1. For v4 signature, http request path should be encoded, currently only parameters are encoded.
2. For v2 signature, http request date header should be in form of either the http date header or x-amz-date, currently in form of ISO 8601
3. Empty response header value cause http_bad_response error.
4. Skip verifying MD5 for range get request and if http response code 206 is returned.
Xiaoge Su