Support configuring RESTAPI to GRPC via HTTPFilterPolicy #605
Description
Description
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Use Scenes
We can leverage the https://www.envoyproxy.io/docs/envoy/latest/configuration/http/http_filters/grpc_json_transcoder_filter#config-http-filters-grpc-json-transcoder filter to do it.
Let's add it as a plugin under https://github.com/mosn/htnn/tree/main/controller/plugins.
The test needs to be added under https://github.com/mosn/htnn/tree/main/controller/internal/translation/testdata/plugins. (Maybe we can move the tests to https://github.com/mosn/htnn/tree/main/controller/plugins in a new PR?)
Don't forget to add e2e test under https://github.com/mosn/htnn/tree/main/e2e/tests.
We can setup a GPRC backend using the image from gateway-api repo.
Feel free to submit the doc in a separate PR if this PR is too big.
Advice
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