Marton Greber has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/21920 )

Change subject: Implement path parameter handling in webserver
......................................................................

Implement path parameter handling in webserver

Introduced path parameter parsing in the webserver to support dynamic
REST API endpoints. Parameters within URIs are now identified using
<parameter_name> notation. Extracted parameters are passed to the
WebRequest as path_params.
Example usage:
Registering a path like "/api/v1/tables/<table_id>" will map the
corresponding part of the URI to the table_id key in the path_params
of the WebRequest.

Query parameter handling won't change with path parameters.
Example for query and path parameters:
Given path "api/v1/tables/<table_id>", we can reach URIs like
"api/v1/tables/1234?var1=1". We can find these in the following way,
assuming we have a WebRequest struct.
req.parsed_args["var1"] = "1"
req.path_params["table_id"] = "1234"

Change-Id: Id2085c55d3b86985c87c5fd5a8b48568f8e6fa63
Reviewed-on: http://gerrit.cloudera.org:8080/21920
Tested-by: Kudu Jenkins
Reviewed-by: Zoltan Chovan <[email protected]>
Reviewed-by: Marton Greber <[email protected]>
---
M src/kudu/server/webserver-test.cc
M src/kudu/server/webserver.cc
M src/kudu/server/webserver.h
M src/kudu/util/web_callback_registry.h
4 files changed, 199 insertions(+), 18 deletions(-)

Approvals:
  Kudu Jenkins: Verified
  Zoltan Chovan: Looks good to me, but someone else must approve
  Marton Greber: Looks good to me, approved

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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: Id2085c55d3b86985c87c5fd5a8b48568f8e6fa63
Gerrit-Change-Number: 21920
Gerrit-PatchSet: 11
Gerrit-Owner: Gabriella Lotz <[email protected]>
Gerrit-Reviewer: Gabriella Lotz <[email protected]>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <[email protected]>
Gerrit-Reviewer: Zoltan Chovan <[email protected]>

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