feat: gzip support (#1)

* gzip support with example and integration test

.github/workflows/integration-test.yml

@@ -42,3 +42,7 @@ jobs:
       uses: ./
       with:
         entrypoint: example/stub-subfolders/entrypoint.sh
+    - name: Run gzip example
+      uses: ./
+      with:
+        entrypoint: example/simple-with-gzip/entrypoint.sh

example/simple-with-gzip/client/main.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"context"
+	"log"
+	"os"
+	"time"
+
+	pb "github.com/tokopedia/gripmock/protogen/example/simple-with-gzip"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/encoding/gzip"
+)
+
+func main() {
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
+	defer cancel()
+
+	// Set up a connection to the server.
+	conn, err := grpc.DialContext(ctx, "localhost:4770", grpc.WithInsecure(), grpc.WithBlock())
+	if err != nil {
+		log.Fatalf("did not connect: %v", err)
+	}
+	defer conn.Close()
+
+	c := pb.NewGripmockClient(conn)
+
+	// Contact the server and print out its response.
+	name := "tokopedia"
+	if len(os.Args) > 1 {
+		name = os.Args[1]
+	}
+	r, err := c.SayHello(context.Background(), &pb.Request{Name: name}, grpc.UseCompressor(gzip.Name))
+	if err != nil {
+		log.Fatalf("error from grpc: %v", err)
+	}
+	log.Printf("Greeting: %s (return code %d)", r.Message, r.ReturnCode)
+
+	name = "world"
+	r, err = c.SayHello(context.Background(), &pb.Request{Name: name}, grpc.UseCompressor(gzip.Name))
+	if err != nil {
+		log.Fatalf("error from grpc: %v", err)
+	}
+	log.Printf("Greeting: %s (return code %d)", r.Message, r.ReturnCode)
+}

example/simple-with-gzip/entrypoint.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env sh
+
+# this file is used by .github/workflows/integration-test.yml
+
+gripmock --stub=example/simple-with-gzip/stub example/simple-with-gzip/simple-with-gzip.proto &
+
+# wait for generated files to be available and gripmock is up
+sleep 2
+
+go run example/simple-with-gzip/client/*.go

example/simple-with-gzip/simple-with-gzip.proto

@@ -0,0 +1,23 @@
+syntax = "proto3";
+option go_package = "github.com/tokopedia/gripmock/protogen/data/protogen/example/simple-with-gzip";
+
+package simple_with_gzip;
+
+
+
+// The Gripmock service definition.
+service Gripmock {
+  // simple unary method
+  rpc SayHello (Request) returns (Reply);
+}
+
+// The request message containing the user's name.
+message Request {
+  string name = 1;
+}
+
+// The response message containing the greetings
+message Reply {
+  string message = 1;
+  int32 return_code = 2;
+}

example/simple-with-gzip/stub/simple-with-gzip.json

@@ -0,0 +1,32 @@
+[
+  {
+    "service": "Gripmock",
+    "method": "SayHello",
+    "input": {
+      "equals": {
+        "name": "tokopedia"
+      }
+    },
+    "output": {
+      "data": {
+        "message": "Hello Tokopedia",
+        "return_code": 1
+      }
+    }
+  },
+  {
+    "service": "Gripmock",
+    "method": "SayHello",
+    "input": {
+      "equals": {
+        "name": "world"
+      }
+    },
+    "output": {
+      "data": {
+        "message": "Hello World",
+        "return_code": 1
+      }
+    }
+  }
+]

protoc-gen-gripmock/server.tmpl

@@ -14,6 +14,7 @@ import (
     "github.com/golang/protobuf/jsonpb"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc"
+	_ "google.golang.org/grpc/encoding/gzip"
 	"google.golang.org/grpc/reflection"
 	"google.golang.org/protobuf/runtime/protoiface"
 )