chore(client): support gRPC and gRPC web protocol

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

client/options.go

@@ -0,0 +1,36 @@
+package client
+
+import "github.com/bufbuild/connect-go"
+
+// An Option configures a mutex.
+type Option interface {
+	Apply(*HTTPClient)
+}
+
+// OptionFunc is a function that configure a value.
+type OptionFunc func(*HTTPClient)
+
+// Apply calls f(option)
+func (f OptionFunc) Apply(cli *HTTPClient) {
+	f(cli)
+}
+
+// WithGRPC configures clients to use the HTTP/2 gRPC protocol.
+func WithGRPC(c bool) Option {
+	return OptionFunc(func(cli *HTTPClient) {
+		if !c {
+			return
+		}
+		cli.opts = append(cli.opts, connect.WithGRPC())
+	})
+}
+
+// WithGRPCWeb configures clients to use the gRPC-Web protocol.
+func WithGRPCWeb(c bool) Option {
+	return OptionFunc(func(cli *HTTPClient) {
+		if !c {
+			return
+		}
+		cli.opts = append(cli.opts, connect.WithGRPCWeb())
+	})
+}