chore: 🤖 [frontend-gray]优化关于处理index page 处理逻辑 (#1345)

Co-authored-by: Kent Dong <ch3cho@qq.com>

plugins/wasm-go/extensions/frontend-gray/README.md

@@ -130,7 +130,7 @@ grayDeployments:
   - name: beta-user
     version: gray
     enabled: true
-		weight: 80
+    weight: 80
 ```
 总的灰度规则为100%，其中灰度版本的权重为`80%`，基线版本为`20%`。一旦用户命中了灰度规则，会根据IP固定这个用户的灰度版本（否则会在下次请求时随机选择一个灰度版本）。
 
@@ -229,16 +229,16 @@ grayDeployments:
   - name: beta-user
     version: gray
     enabled: true
-		weight: 80
+    weight: 80
 injection:
-	head: 
+  head: 
-		- <script>console.log('Header')</script>
+    - <script>console.log('Header')</script>
-	body:
+  body:
-		first:
+    first:
-			- <script>console.log('hello world before')</script>
+      - <script>console.log('hello world before')</script>
-			- <script>console.log('hello world before1')</script>
+      - <script>console.log('hello world before1')</script>
-		last:
+    last:
-			- <script>console.log('hello world after')</script>
+      - <script>console.log('hello world after')</script>
-			- <script>console.log('hello world after2')</script>
+      - <script>console.log('hello world after2')</script>
 ```
 通过 `injection`往HTML首页注入代码，可以在`head`标签注入代码，也可以在`body`标签的`first`和`last`位置注入代码。

plugins/wasm-go/extensions/frontend-gray/envoy.yaml

@@ -73,25 +73,24 @@ static_resources:
                                 ],
                                 "rewrite": {
                                   "host": "frontend-gray-cn-shanghai.oss-cn-shanghai-internal.aliyuncs.com",
-                                  "notFoundUri": "/mfe/app1/{version}/333.html",
+                                  "notFoundUri": "/cygtapi/{version}/333.html",
                                   "indexRouting": {
-                                    "/app1": "/mfe/app1/{version}/index.html",
+                                    "/app1": "/cygtapi/{version}/index.html",
-                                    "/": "/mfe/app1/{version}/index.html"
+                                    "/": "/cygtapi/{version}/index.html"
                                   },
                                   "fileRouting": {
-                                    "/":             "/mfe/app1/{version}",
+                                    "/": "/cygtapi/{version}",
-                                    "/app1":             "/mfe/app1/{version}"
+                                    "/app1": "/cygtapi/{version}"
                                   }
                                 },
                                 "baseDeployment": {
-                                  "version": "dev"
+                                  "version": "base"
                                 },
                                 "grayDeployments": [
                                   {
                                     "name": "beta-user",
-                                    "version": "0.0.1",
+                                    "version": "gray",
-                                    "enabled": true,
+                                    "enabled": true
-                                    "weight": 50
                                   }
                                 ],
                                 "injection": {
@@ -128,4 +127,4 @@ static_resources:
                   address:
                     socket_address:
                       address: frontend-gray-cn-shanghai.oss-cn-shanghai.aliyuncs.com
-                      port_value: 80
+                      port_value: 80

plugins/wasm-go/extensions/frontend-gray/main.go

@@ -108,19 +108,26 @@ func onHttpResponseHeader(ctx wrapper.HttpContext, grayConfig config.GrayConfig,
 	if !util.IsGrayEnabled(grayConfig) {
 		return types.ActionContinue
 	}
-	status, err := proxywasm.GetHttpResponseHeader(":status")
+	isPageRequest, ok := ctx.GetContext(config.IsPageRequest).(bool)
-	contentType, _ := proxywasm.GetHttpResponseHeader("Content-Type")
+	if !ok {
+		isPageRequest = false // 默认值
+	}
+	// response 不处理非首页的请求
+	if !isPageRequest {
+		ctx.DontReadResponseBody()
+		return types.ActionContinue
+	}
 
+	status, err := proxywasm.GetHttpResponseHeader(":status")
 	if grayConfig.Rewrite != nil && grayConfig.Rewrite.Host != "" {
 		// 删除Content-Disposition，避免自动下载文件
 		proxywasm.RemoveHttpResponseHeader("Content-Disposition")
 	}
 
-	isPageRequest, ok := ctx.GetContext(config.IsPageRequest).(bool)
+	// 删除content-length，可能要修改Response返回值
-	if !ok {
+	proxywasm.RemoveHttpResponseHeader("Content-Length")
-		isPageRequest = false // 默认值
-	}
 
+	// 处理code为 200的情况
 	if err != nil || status != "200" {
 		if status == "404" {
 			if grayConfig.Rewrite.NotFound != "" && isPageRequest {
@@ -143,6 +150,7 @@ func onHttpResponseHeader(ctx wrapper.HttpContext, grayConfig config.GrayConfig,
 				ctx.BufferResponseBody()
 				return types.ActionContinue
 			} else {
+				// 直接返回400
 				ctx.DontReadResponseBody()
 			}
 		}
@@ -150,25 +158,19 @@ func onHttpResponseHeader(ctx wrapper.HttpContext, grayConfig config.GrayConfig,
 		return types.ActionContinue
 	}
 
-	// 删除content-length，可能要修改Response返回值
+	// 不会进去Streaming 的Body处理
-	proxywasm.RemoveHttpResponseHeader("Content-Length")
+	ctx.BufferResponseBody()
+	proxywasm.ReplaceHttpResponseHeader("Cache-Control", "no-cache, no-store, max-age=0, must-revalidate")
 
-	if strings.HasPrefix(contentType, "text/html") || isPageRequest {
+	frontendVersion := ctx.GetContext(config.XPreHigressTag).(string)
-		// 不会进去Streaming 的Body处理
+	xUniqueClient := ctx.GetContext(config.XUniqueClientId).(string)
-		ctx.BufferResponseBody()
 
-		proxywasm.ReplaceHttpResponseHeader("Cache-Control", "no-cache, no-store")
+	// 设置前端的版本
-
+	proxywasm.AddHttpResponseHeader("Set-Cookie", fmt.Sprintf("%s=%s,%s; Max-Age=%s; Path=/;", config.XPreHigressTag, frontendVersion, xUniqueClient, grayConfig.UserStickyMaxAge))
-		frontendVersion := ctx.GetContext(config.XPreHigressTag).(string)
+	// 设置后端的版本
-		xUniqueClient := ctx.GetContext(config.XUniqueClientId).(string)
+	if util.IsBackendGrayEnabled(grayConfig) {
-
+		backendVersion := ctx.GetContext(grayConfig.BackendGrayTag).(string)
-		// 设置前端的版本
+		proxywasm.AddHttpResponseHeader("Set-Cookie", fmt.Sprintf("%s=%s; Max-Age=%s; Path=/;", grayConfig.BackendGrayTag, backendVersion, grayConfig.UserStickyMaxAge))
-		proxywasm.AddHttpResponseHeader("Set-Cookie", fmt.Sprintf("%s=%s,%s; Max-Age=%s; Path=/;", config.XPreHigressTag, frontendVersion, xUniqueClient, grayConfig.UserStickyMaxAge))
-		// 设置后端的版本
-		if util.IsBackendGrayEnabled(grayConfig) {
-			backendVersion := ctx.GetContext(grayConfig.BackendGrayTag).(string)
-			proxywasm.AddHttpResponseHeader("Set-Cookie", fmt.Sprintf("%s=%s; Max-Age=%s; Path=/;", grayConfig.BackendGrayTag, backendVersion, grayConfig.UserStickyMaxAge))
-		}
 	}
 	return types.ActionContinue
 }