get upstream serviceSource from RouteCluster information and update docs (#337)

plugins/wasm-go/extensions/de-graphql/config/degraphql_config.go

@@ -16,7 +16,6 @@ package config
 
 import (
 	"errors"
-	"github.com/alibaba/higress/plugins/wasm-go/pkg/wrapper"
 	"net/url"
 	"regexp"
 	"strings"
@@ -46,10 +45,10 @@ type Variable struct {
 }
 
 type DeGraphQLConfig struct {
-	client    wrapper.HttpClient
 	gql       string
 	endpoint  string
 	timeout   uint32
+	domain    string
 	variables []Variable
 }
 
@@ -63,6 +62,14 @@ func (d *DeGraphQLConfig) SetEndpoint(endpoint string) error {
 	return nil
 }
 
+func (d *DeGraphQLConfig) GetDomain() string {
+	return d.domain
+}
+
+func (d *DeGraphQLConfig) SetDomain(domain string) {
+	d.domain = domain
+}
+
 func (d *DeGraphQLConfig) GetEndpoint() string {
 	return d.endpoint
 }
@@ -79,14 +86,6 @@ func (d *DeGraphQLConfig) SetTimeout(timeout uint32) {
 	}
 }
 
-func (d *DeGraphQLConfig) SetClient(client wrapper.HttpClient) {
-	d.client = client
-}
-
-func (d *DeGraphQLConfig) GetClient() wrapper.HttpClient {
-	return d.client
-}
-
 func (d *DeGraphQLConfig) SetGql(gql string) error {
 	if strings.TrimSpace(gql) == "" {
 		return errors.New("gql can't be empty")