chore: support h2c

gin-gonic/gin#1398

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

cmd/client/main.go

@@ -2,27 +2,40 @@ package main
 
 import (
 	"context"
+	"crypto/tls"
 	"log"
+	"net"
 	"net/http"
 
 	v1 "github.com/go-training/gin-connect-demo/gen/proto/v1"        // generated by protoc-gen-go
 	"github.com/go-training/gin-connect-demo/gen/proto/v1/v1connect" // generated by protoc-gen-connect-go
 
 	"github.com/bufbuild/connect-go"
+	"golang.org/x/net/http2"
 )
 
 func main() {
+	c := &http.Client{
+		Transport: &http2.Transport{
+			AllowHTTP: true,
+			DialTLS: func(netw, addr string, cfg *tls.Config) (net.Conn, error) {
+				return net.Dial(netw, addr)
+			},
+		},
+	}
+
 	client := v1connect.NewGiteaServiceClient(
-		http.DefaultClient,
+		c,
 		"http://localhost:8080/",
 	)
 	req := connect.NewRequest(&v1.GiteaRequest{
 		Name: "foobar",
 	})
-	req.Header().Set("Some-Header", "hello from connect")
+	req.Header().Set("Gitea-Header", "hello from connect")
 	res, err := client.Gitea(context.Background(), req)
 	if err != nil {
 		log.Fatalln(err)
 	}
-	log.Println(res.Msg)
+	log.Println("Message:", res.Msg.Giteaing)
+	log.Println("Gitea-Version:", res.Header().Get("Gitea-Version"))
 }

cmd/server/main.go

@@ -29,6 +29,7 @@ func (s *GiteaServer) Gitea(
 
 func giteaHandler(h http.Handler) gin.HandlerFunc {
 	return func(c *gin.Context) {
+		log.Println("Got connection:", c.Request.Proto)
 		h.ServeHTTP(c.Writer, c.Request)
 	}
 }
@@ -37,8 +38,9 @@ func main() {
 	greeter := &GiteaServer{}
 	path, handler := v1connect.NewGiteaServiceHandler(greeter)
 
-	router := gin.Default()
-	router.POST(path+":name", giteaHandler(handler))
+	r := gin.Default()
+	r.UseH2C = true
+	r.POST(path+":name", giteaHandler(handler))
 
-	router.Run(":8080")
+	r.Run(":8080")
 }

go.mod

@@ -5,6 +5,7 @@ go 1.18
 require (
 	github.com/bufbuild/connect-go v0.2.0
 	github.com/gin-gonic/gin v1.8.1
+	golang.org/x/net v0.0.0-20220728211354-c7608f3a8462
 	google.golang.org/protobuf v1.28.1
 )
 
@@ -22,7 +23,6 @@ require (
 	github.com/pelletier/go-toml/v2 v2.0.1 // indirect
 	github.com/ugorji/go/codec v1.2.7 // indirect
 	golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97 // indirect
-	golang.org/x/net v0.0.0-20220728211354-c7608f3a8462 // indirect
 	golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10 // indirect
 	golang.org/x/text v0.3.7 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect