Client Proxy Server Proxy

After we have done the server-proxy, we can set up the market API to use the client-proxy to access the petstore API.

Assume that the petstore API and the server-proxy still up and running. The following command can confirm the petstore is working and accessible from the server-proxy.

curl -k https://localhost:7443/v1/pets

And the result should be.

[{"id":1,"name":"catten","tag":"cat"},{"id":2,"name":"doggy","tag":"dog"}]

Client Proxy

Let’s start another light-gateway instance for the client-proxy. The market API will call the client-proxy, the client-proxy will call the server-proxy and then the server-proxy will call the petstore API.

Open another terminal and start the client-proxy.

cd ~/networknt/light-gateway
java -jar -Dlight-4j-config-dir=config/client-proxy-market target/light-gateway.jar

Market API

Let’s start the market API.

cd ~/networknt/light-example-4j/rest/market
java -jar target/server.jar

The server will start and listen to port 6443 on HTTPS/2.

Test Market

curl -k https://localhost:6443/petstore/products

you should have the following result.

[{"id":1,"name":"catten","tag":"cat"},{"id":2,"name":"doggy","tag":"dog"}]

Client Proxy Configuration

The configuration files are located in light-gateway/config/client-proxy-market folder.

handler.yml

Here is the chain for routing only.

chains:
  default:
    - exception
    - metrics
    - traceability
    - correlation
    - cors
    - header
    - router

values.yml

• server.yml

Set the httpPort to 9080 and give it a serviceId called com.networknt.client-gateway-market

• router.yml

Allow the hostWhitelist for localhost and set the maxRequestTime to 3 seconds.

• pathPrefixService.yml

Add /v1/pets to com.networknt.petstore mapping

• service.yml

Add an entry for petstore to localhost:7443 which is the server proxy of petstore.

com.networknt.petstore: https://localhost:7443

Here is the entire file.

# server.yml
server.httpPort: 9080
server.enableHttp: true
server.enableHttps: false
server.enableHttp2: false
server.serviceId: com.networknt.client-gateway-market

# router.yml
router.maxRequestTime: 3000
router.hostWhitelist:
  - localhost

# pathPrefixService.yml
pathPrefixService.mapping:
  /v1/pets: com.networknt.petstore

# service.yml
service.singletons:
  - com.networknt.registry.URL:
      - com.networknt.registry.URLImpl:
          parameters:
            com.networknt.petstore: https://localhost:7443
  - com.networknt.registry.Registry:
      - com.networknt.registry.support.DirectRegistry
  - com.networknt.balance.LoadBalance:
      - com.networknt.balance.RoundRobinLoadBalance
  - com.networknt.cluster.Cluster:
      - com.networknt.cluster.LightCluster
  - com.networknt.utility.Decryptor:
      - com.networknt.decrypt.AESDecryptor