switch from gorilla/mux to go-chi

Signed-off-by: Lize Cai <lize.cai@sap.com>

Author: lizzzcai

context/context.go

@@ -17,7 +17,7 @@ import (
 	cloudevents "github.com/cloudevents/sdk-go/v2"
 	dapr "github.com/dapr/go-sdk/client"
 	"github.com/dapr/go-sdk/service/common"
-	"github.com/gorilla/mux"
+	"github.com/go-chi/chi/v5"
 	"k8s.io/klog/v2"
 	agentv3 "skywalking.apache.org/repo/goapi/collect/language/agent/v3"
 )
@@ -966,11 +966,9 @@ const (
 	varsKey contextKey = iota
 )
 
-// Vars returns the route variables for the current request, if any.
-var (
-	Vars = mux.Vars
-)
-
+// CtxWithVars is just for backward compatibility of VarsFromCtx to the previous implementation using gorilla/mux
+// CtxWithVars adds URL Parameters into Context and user can get them by VarsFromCtx
+// However, the recommended way to read URL Parameter in go-chi/chi is using URLParamFromCtx
 func CtxWithVars(ctx context.Context, vars map[string]string) context.Context {
 	return context.WithValue(ctx, varsKey, vars)
 }
@@ -982,6 +980,24 @@ func VarsFromCtx(ctx context.Context) map[string]string {
 	return nil
 }
 
+// URLParamFromCtx returns the url parameter from a http.Request Context.
+func URLParamFromCtx(ctx context.Context, key string) string {
+	return chi.URLParamFromCtx(ctx, key)
+}
+
+// URLParamsFromCtx returns all the url parameters from a http.Request Context.
+func URLParamsFromCtx(ctx context.Context) map[string]string {
+	res := map[string]string{}
+	if rctx := chi.RouteContext(ctx); rctx != nil {
+		for k := 0; k < len(rctx.URLParams.Keys); k++ {
+			key := rctx.URLParams.Keys[k]
+			val := rctx.URLParams.Values[k]
+			res[key] = val
+		}
+	}
+	return res
+}
+
 func IsTracingProviderSkyWalking(ctx RuntimeContext) bool {
 	if ctx.HasPluginsTracingCfg() && ctx.GetPluginsTracingCfg().IsEnabled() &&
 		ctx.GetPluginsTracingCfg().ProviderName() == TracingProviderSkywalking {

context/context_test.go

@@ -1,11 +1,11 @@
 package context
 
 import (
+	"net/http"
 	"os"
+	"reflect"
 	"strings"
 	"testing"
-	"net/http"
-	"reflect"
 )
 
 var (
@@ -108,8 +108,8 @@ var (
 // TestParseFunctionContext tests and verifies the function that parses the function FunctionContext
 func TestParseFunctionContext(t *testing.T) {
 	_, err := GetRuntimeContext()
-	if !strings.Contains(err.Error(), "env FUNC_CONTEXT not found") {
-		t.Fatal("Error parse function context")
+	if err != nil && !strings.Contains(err.Error(), "env FUNC_CONTEXT not found") {
+		t.Fatalf("Error parse function context: %s", err.Error())
 	}
 
 	// test `podName`, `podNamespace` field
@@ -295,7 +295,6 @@ func TestParseFunctionContext(t *testing.T) {
 	}
 }
 
-
 func TestGetVarsFromContext(t *testing.T) {
 
 	tests := []struct {
@@ -304,14 +303,14 @@ func TestGetVarsFromContext(t *testing.T) {
 		vars    map[string]string
 	}{
 		{
-			name: "single variable",
+			name:    "single variable",
 			request: &http.Request{},
-			vars: map[string]string{"key1": "val1"},
+			vars:    map[string]string{"key1": "val1"},
 		},
 		{
-			name: "multi variables",
+			name:    "multi variables",
 			request: &http.Request{},
-			vars: map[string]string{"key1": "val1", "key2": "val2"},
+			vars:    map[string]string{"key1": "val1", "key2": "val2"},
 		},
 	}
 	for _, tt := range tests {
@@ -326,4 +325,4 @@ func TestGetVarsFromContext(t *testing.T) {
 		})
 	}
 
-}
+}

go.mod

@@ -8,9 +8,9 @@ require (
 	github.com/dapr/dapr v1.8.3
 	github.com/dapr/go-sdk v1.5.0
 	github.com/fatih/structs v1.1.0
+	github.com/go-chi/chi/v5 v5.0.8
 	github.com/golang/protobuf v1.5.2
 	github.com/google/uuid v1.3.0
-	github.com/gorilla/mux v1.8.0
 	github.com/pkg/errors v0.9.1
 	github.com/stretchr/testify v1.7.4
 	google.golang.org/grpc v1.47.0
@@ -21,6 +21,7 @@ require (
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/go-logr/logr v1.2.3 // indirect
+	github.com/gorilla/mux v1.8.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/kr/pretty v0.3.0 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect

go.sum

@@ -646,8 +646,11 @@ github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm
 github.com/gin-gonic/gin v1.6.3/go.mod h1:75u5sXoLsGZoRN5Sgbi1eraJ4GU3++wFwWzhwvtwp4M=
 github.com/gin-gonic/gin v1.7.7/go.mod h1:axIBovoeJpVj8S3BwE0uPMTeReE4+AfFtqpqaZ1qq1U=
 github.com/go-asn1-ber/asn1-ber v1.3.1/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
+github.com/go-chi/chi v4.0.2+incompatible h1:maB6vn6FqCxrpz4FqWdh4+lwpyZIQS7YEAUcHlgXVRs=
 github.com/go-chi/chi v4.0.2+incompatible/go.mod h1:eB3wogJHnLi3x/kFX2A+IbTBlXxmMeXJVKy9tTv1XzQ=
 github.com/go-chi/chi/v5 v5.0.0/go.mod h1:BBug9lr0cqtdAhsu6R4AAdvufI0/XBzAQSsUqJpoZOs=
+github.com/go-chi/chi/v5 v5.0.8 h1:lD+NLqFcAi1ovnVZpsnObHGW4xb4J8lNmoYVfECH1Y0=
+github.com/go-chi/chi/v5 v5.0.8/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
 github.com/go-co-op/gocron v1.9.0/go.mod h1:DbJm9kdgr1sEvWpHCA7dFFs/PGHPMil9/97EXCRPr4k=
 github.com/go-errors/errors v1.0.1/go.mod h1:f4zRHt4oKfwPJE5k8C9vpYG+aDHdBFUsgrm6/TyX73Q=
 github.com/go-errors/errors v1.4.0/go.mod h1:sIVyrIiJhuEF+Pj9Ebtd6P/rEYROXFi3BopGUQ5a5Og=

runtime/knative/knative.go

@@ -10,7 +10,7 @@ import (
 
 	cloudevents "github.com/cloudevents/sdk-go/v2"
 
-	"github.com/gorilla/mux"
+	"github.com/go-chi/chi/v5"
 	"k8s.io/klog/v2"
 
 	ofctx "github.com/OpenFunction/functions-framework-go/context"
@@ -30,7 +30,7 @@ const (
 type Runtime struct {
 	port    string
 	pattern string
-	handler *mux.Router
+	handler *chi.Mux
 }
 
 func NewKnativeRuntime(port string, pattern string) *Runtime {
@@ -40,7 +40,7 @@ func NewKnativeRuntime(port string, pattern string) *Runtime {
 	return &Runtime{
 		port:    port,
 		pattern: pattern,
-		handler: mux.NewRouter(),
+		handler: chi.NewRouter(),
 	}
 }
 
@@ -61,11 +61,10 @@ func (r *Runtime) RegisterOpenFunction(
 		ctx.InitDaprClientIfNil()
 	}
 
-	// Register the synchronous function (based on Knaitve runtime)
-	route := r.handler.HandleFunc(rf.GetPath(), func(w http.ResponseWriter, r *http.Request) {
+	fn := func(w http.ResponseWriter, r *http.Request) {
 		rm := runtime.NewRuntimeManager(ctx, prePlugins, postPlugins)
 		// save the Vars into the context
-		_ctx := ofctx.CtxWithVars(r.Context(), ofctx.Vars(r))
+		_ctx := ofctx.CtxWithVars(r.Context(), ofctx.URLParamsFromCtx(r.Context()))
 		rm.FuncContext.SetNativeContext(_ctx)
 		rm.FuncContext.SetSyncRequest(w, r.WithContext(_ctx))
 		defer RecoverPanicHTTP(w, "Function panic")
@@ -84,12 +83,17 @@ func (r *Runtime) RegisterOpenFunction(
 		default:
 			return
 		}
-	})
+	}
 
-	// add methods matcher if provided
 	methods := rf.GetFunctionMethods()
+	// Register the synchronous function (based on Knaitve runtime)
 	if len(methods) > 0 {
-		route.Methods(methods...)
+		// add methods matcher if provided
+		for _, method := range methods {
+			r.handler.MethodFunc(method, rf.GetPath(), fn)
+		}
+	} else {
+		r.handler.HandleFunc(rf.GetPath(), fn)
 	}
 
 	return nil
@@ -101,20 +105,24 @@ func (r *Runtime) RegisterHTTPFunction(
 	postPlugins []plugin.Plugin,
 	rf *functions.RegisteredFunction,
 ) error {
-	route := r.handler.HandleFunc(rf.GetPath(), func(w http.ResponseWriter, r *http.Request) {
+	fn := func(w http.ResponseWriter, r *http.Request) {
 		rm := runtime.NewRuntimeManager(ctx, prePlugins, postPlugins)
 		// save the Vars into the context
-		_ctx := ofctx.CtxWithVars(r.Context(), ofctx.Vars(r))
+		_ctx := ofctx.CtxWithVars(r.Context(), ofctx.URLParamsFromCtx(r.Context()))
 		rm.FuncContext.SetNativeContext(_ctx)
 		rm.FuncContext.SetSyncRequest(w, r.WithContext(_ctx))
 		defer RecoverPanicHTTP(w, "Function panic")
 		rm.FunctionRunWrapperWithHooks(rf.GetHTTPFunction())
-	})
+	}
 
-	// add methods matcher if any
 	methods := rf.GetFunctionMethods()
 	if len(methods) > 0 {
-		route.Methods(methods...)
+		// add methods matcher if provided
+		for _, method := range methods {
+			r.handler.MethodFunc(method, rf.GetPath(), fn)
+		}
+	} else {
+		r.handler.HandleFunc(rf.GetPath(), fn)
 	}
 
 	return nil
@@ -150,8 +158,8 @@ func (r *Runtime) RegisterCloudEventFunction(
 	// function to extract Vars and add into ctx
 	withVars := func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			ctx := ofctx.CtxWithVars(r.Context(), ofctx.Vars(r))
-			next.ServeHTTP(w, r.WithContext(ctx))
+			_ctx := ofctx.CtxWithVars(r.Context(), ofctx.URLParamsFromCtx(r.Context()))
+			next.ServeHTTP(w, r.WithContext(_ctx))
 		})
 	}
 	r.handler.Handle(rf.GetPath(), withVars(handleFn))

test/declarative/sync-http-variables/README.md

@@ -0,0 +1,72 @@
+# Sync-HTTP-Variables
+
+To run test cases locally
+
+## Run locally
+
+```sh
+$ cd test/declarative/sync-http-variables
+$ go run main.go http.go
+```
+
+## Send request
+
+### HTTP
+
+```sh
+$ curl -X POST "http://localhost:8080/hello/openfunction?key1=value1" -d 'hello'
+
+{"hello":"openfunction"}% 
+```
+
+### CloudEvent
+
+```sh
+# binary
+$ curl "http://localhost:8080/foo/openfunction" \
+    -H "Ce-Specversion: 1.0" \
+    -H "Ce-Type: io.openfunction.samples.helloworld" \
+    -H "Ce-Source: io.openfunction.samples/helloworldsource" \
+    -H "Ce-Id: 536808d3-88be-4077-9d7a-a3f162705f79" \
+    -H "Content-Type: application/json" \
+    -d '{"data":"hello"}'
+
+I0605 01:38:57.481196   81001 http.go:87] cloudevent - Data: {"hello":"openfunction"}
+I0605 01:38:57.481310   81001 plugin-example.go:88] plugin - Result: {"sum":2}
+
+# structured
+$ curl "http://localhost:8080/foo/openfunction" \
+    -H "Content-Type: application/cloudevents+json" \
+    -d '{"specversion":"1.0","type":"io.openfunction.samples.helloworld","source":"io.openfunction.samples/helloworldsource","id":"536808d3-88be-4077-9d7a-a3f162705f79","data":{"data":"hello"}}'
+
+I0605 01:46:52.336317   81001 http.go:87] cloudevent - Data: {"hello":"openfunction"}
+I0605 01:46:52.336342   81001 plugin-example.go:88] plugin - Result: {"sum":2}
+```
+
+### OpenFunction
+
+```sh
+# HTTP
+$ curl -X GET "http://localhost:8080/bar/openfunction?key1=value1" -d '{"data":"hello"}'
+
+{"hello":"openfunction"}%
+
+# CloudEvent
+## binary
+$ curl "http://localhost:8080/bar/openfunction" \
+    -H "Ce-Specversion: 1.0" \
+    -H "Ce-Type: io.openfunction.samples.helloworld" \
+    -H "Ce-Source: io.openfunction.samples/helloworldsource" \
+    -H "Ce-Id: 536808d3-88be-4077-9d7a-a3f162705f79" \
+    -H "Content-Type: application/json" \
+    -d '{"data":"hello"}'
+
+{"hello":"openfunction"}
+
+## structured
+$ curl "http://localhost:8080/bar/openfunction" \
+    -H "Content-Type: application/cloudevents+json" \
+    -d '{"specversion":"1.0","type":"io.openfunction.samples.helloworld","source":"io.openfunction.samples/helloworldsource","id":"536808d3-88be-4077-9d7a-a3f162705f79","data":{"data":"hello"}}'
+
+{"hello":"openfunction"}%
+```

test/declarative/sync-http-variables/http.go

@@ -46,16 +46,18 @@ type Message struct {
 }
 
 func hello(w http.ResponseWriter, r *http.Request) {
-	vars := ofctx.VarsFromCtx(r.Context())
+	name := ofctx.URLParamFromCtx(r.Context(), "name")
 	response := map[string]string{
-		"hello": vars["name"],
+		"hello": name,
 	}
 	responseBytes, _ := json.Marshal(response)
 	w.Header().Set("Content-type", "application/json")
 	w.Write(responseBytes)
 }
 
 func hellov2(w http.ResponseWriter, r *http.Request) {
+	// keep for backward compatibility, same for example below
+	// suggest to use ofctx.URLParamFromCtx(...) to get vars
 	vars := ofctx.VarsFromCtx(r.Context())
 	response := map[string]string{
 		"hello": vars["name"],
@@ -66,16 +68,15 @@ func hellov2(w http.ResponseWriter, r *http.Request) {
 }
 
 func foo(ctx context.Context, ce cloudevents.Event) error {
-	vars := ofctx.VarsFromCtx(ctx)
-
 	msg := &Message{}
 	err := json.Unmarshal(ce.Data(), msg)
 	if err != nil {
 		return err
 	}
 
+	name := ofctx.URLParamFromCtx(ctx, "name")
 	response := map[string]string{
-		msg.Data: vars["name"],
+		msg.Data: name,
 	}
 	responseBytes, _ := json.Marshal(response)
 	klog.Infof("cloudevent - Data: %s", string(responseBytes))
@@ -100,15 +101,15 @@ func foov2(ctx context.Context, ce cloudevents.Event) error {
 }
 
 func bar(ctx ofctx.Context, in []byte) (ofctx.Out, error) {
-	vars := ofctx.VarsFromCtx(ctx.GetNativeContext())
 	msg := &Message{}
 	err := json.Unmarshal(in, msg)
 	if err != nil {
 		return ctx.ReturnOnInternalError(), err
 	}
 
+	name := ofctx.URLParamFromCtx(ctx.GetNativeContext(), "name")
 	response := map[string]string{
-		msg.Data: vars["name"],
+		msg.Data: name,
 	}
 	responseBytes, _ := json.Marshal(response)
 	return ctx.ReturnOnSuccess().WithData(responseBytes), nil

test/declarative/sync-http-variables/verify-cloudevent-structured.sh

@@ -2,7 +2,7 @@
 
 url=http://$1
 while true; do
-  st=$(curl -s -o /dev/null -w "%{http_code}" "$url" -H "Content-Type: application/cloudevents+json" -d '{"specversion":"1.0","type":"dev.knative.samples.helloworld","source":"dev.knative.samples/helloworldsource","id":"536808d3-88be-4077-9d7a-a3f162705f79","data":{"data":"hello"}}')
+  st=$(curl -s -o /dev/null -w "%{http_code}" "$url" -H "Content-Type: application/cloudevents+json" -d '{"specversion":"1.0","type":"io.openfunction.samples.helloworld","source":"io.openfunction.samples/helloworldsource","id":"536808d3-88be-4077-9d7a-a3f162705f79","data":{"data":"hello"}}')
   if [ "$st" -eq 200 ]; then
     data_result=$(KUBECONFIG=/tmp/e2e-k8s.config kubectl logs --tail=2 -l app="sync-http-variables" -c http | grep Data | awk '{ print $8 }' | yq -P '.' -)
     plugin_result=$(KUBECONFIG=/tmp/e2e-k8s.config kubectl logs --tail=2 -l app="sync-http-variables" -c http | grep plugin | awk '{ print $8 }' | yq -P '.' -)