feat: ai-proxy support custom error handler by cover util.ErrorHandler (#1537)

Author: pepesi

plugins/wasm-go/extensions/ai-proxy/main.go

@@ -114,7 +114,7 @@ func onHttpRequestHeader(ctx wrapper.HttpContext, pluginConfig config.PluginConf
 			return action
 		}
 
-		_ = util.SendResponse(500, "ai-proxy.proc_req_headers_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to process request headers: %v", err))
+		util.ErrorHandler("ai-proxy.proc_req_headers_failed", fmt.Errorf("failed to process request headers: %v", err))
 		return types.ActionContinue
 	}
 
@@ -136,7 +136,10 @@ func onHttpRequestBody(ctx wrapper.HttpContext, pluginConfig config.PluginConfig
 
 		newBody, settingErr := pluginConfig.GetProviderConfig().ReplaceByCustomSettings(body)
 		if settingErr != nil {
-			_ = util.SendResponse(500, "ai-proxy.proc_req_body_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to rewrite request body by custom settings: %v", settingErr))
+			util.ErrorHandler(
+				"ai-proxy.proc_req_body_failed",
+				fmt.Errorf("failed to replace request body by custom settings: %v", settingErr),
+			)
 			return types.ActionContinue
 		}
 
@@ -146,7 +149,7 @@ func onHttpRequestBody(ctx wrapper.HttpContext, pluginConfig config.PluginConfig
 		if err == nil {
 			return action
 		}
-		_ = util.SendResponse(500, "ai-proxy.proc_req_body_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to process request body: %v", err))
+		util.ErrorHandler("ai-proxy.proc_req_body_failed", fmt.Errorf("failed to process request body: %v", err))
 	}
 	return types.ActionContinue
 }
@@ -193,7 +196,7 @@ func onHttpResponseHeaders(ctx wrapper.HttpContext, pluginConfig config.PluginCo
 			checkStream(&ctx, log)
 			return action
 		}
-		_ = util.SendResponse(500, "ai-proxy.proc_resp_headers_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to process response headers: %v", err))
+		util.ErrorHandler("ai-proxy.proc_resp_headers_failed", fmt.Errorf("failed to process response headers: %v", err))
 		return types.ActionContinue
 	}
 
@@ -248,7 +251,7 @@ func onHttpResponseBody(ctx wrapper.HttpContext, pluginConfig config.PluginConfi
 		if err == nil {
 			return action
 		}
-		_ = util.SendResponse(500, "ai-proxy.proc_resp_body_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to process response body: %v", err))
+		util.ErrorHandler("ai-proxy.proc_resp_body_failed", fmt.Errorf("failed to process response body: %v", err))
 		return types.ActionContinue
 	}
 	return types.ActionContinue

plugins/wasm-go/extensions/ai-proxy/provider/context.go

@@ -139,7 +139,7 @@ func insertContext(provider Provider, content string, err error, body []byte, lo
 	typ := provider.GetProviderType()
 	if err != nil {
 		log.Errorf("failed to load context file: %v", err)
-		_ = util.SendResponse(500, fmt.Sprintf("ai-proxy.%s.load_ctx_failed", typ), util.MimeTypeTextPlain, fmt.Sprintf("failed to load context file: %v", err))
+		util.ErrorHandler(fmt.Sprintf("ai-proxy.%s.load_ctx_failed", typ), fmt.Errorf("failed to load context file: %v", err))
 	}
 
 	if inserter, ok := provider.(ContextInserter); ok {
@@ -149,10 +149,10 @@ func insertContext(provider Provider, content string, err error, body []byte, lo
 	}
 
 	if err != nil {
-		_ = util.SendResponse(500, fmt.Sprintf("ai-proxy.%s.insert_ctx_failed", typ), util.MimeTypeTextPlain, fmt.Sprintf("failed to insert context message: %v", err))
+		util.ErrorHandler(fmt.Sprintf("ai-proxy.%s.insert_ctx_failed", typ), fmt.Errorf("failed to insert context message: %v", err))
 	}
 	if err := replaceHttpJsonRequestBody(body, log); err != nil {
-		_ = util.SendResponse(500, fmt.Sprintf("ai-proxy.%s.replace_request_body_failed", typ), util.MimeTypeTextPlain, fmt.Sprintf("failed to replace request body: %v", err))
+		util.ErrorHandler(fmt.Sprintf("ai-proxy.%s.replace_request_body_failed", typ), fmt.Errorf("failed to replace request body: %v", err))
 	}
 }
 

plugins/wasm-go/extensions/ai-proxy/provider/hunyuan.go

@@ -172,7 +172,7 @@ func (m *hunyuanProvider) OnRequestBody(ctx wrapper.HttpContext, apiName ApiName
 
 			if err != nil {
 				log.Errorf("failed to load context file: %v", err)
-				_ = util.SendResponse(500, "ai-proxy.hunyuan.load_ctx_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to load context file: %v", err))
+				util.ErrorHandler("ai-proxy.hunyuan.load_ctx_failed", fmt.Errorf("failed to load context file: %v", err))
 			}
 			m.insertContextMessageIntoHunyuanRequest(request, content)
 
@@ -182,7 +182,7 @@ func (m *hunyuanProvider) OnRequestBody(ctx wrapper.HttpContext, apiName ApiName
 			_ = util.OverwriteRequestAuthorization(authorizedValueNew)
 
 			if err := replaceJsonRequestBody(request, log); err != nil {
-				_ = util.SendResponse(500, "ai-proxy.hunyuan.insert_ctx_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to replace request body: %v", err))
+				util.ErrorHandler("ai-proxy.hunyuan.insert_ctx_failed", fmt.Errorf("failed to replace request body: %v", err))
 			}
 		}, log)
 		if err == nil {
@@ -244,7 +244,7 @@ func (m *hunyuanProvider) OnRequestBody(ctx wrapper.HttpContext, apiName ApiName
 		}()
 		if err != nil {
 			log.Errorf("failed to load context file: %v", err)
-			_ = util.SendResponse(500, "ai-proxy.hunyuan.load_ctx_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to load context file: %v", err))
+			util.ErrorHandler("ai-proxy.hunyuan.load_ctx_failed", fmt.Errorf("failed to load context file: %v", err))
 			return
 		}
 		insertContextMessage(request, content)
@@ -256,7 +256,7 @@ func (m *hunyuanProvider) OnRequestBody(ctx wrapper.HttpContext, apiName ApiName
 		_ = util.OverwriteRequestAuthorization(authorizedValueNew)
 
 		if err := replaceJsonRequestBody(hunyuanRequest, log); err != nil {
-			_ = util.SendResponse(500, "ai-proxy.hunyuan.insert_ctx_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to replace request body: %v", err))
+			util.ErrorHandler("ai-proxy.hunyuan.insert_ctx_failed", fmt.Errorf("failed to replace request body: %v", err))
 		}
 	}, log)
 	if err == nil {

plugins/wasm-go/extensions/ai-proxy/provider/minimax.go

@@ -141,14 +141,14 @@ func (m *minimaxProvider) handleRequestBodyByChatCompletionPro(body []byte, log
 		}()
 		if err != nil {
 			log.Errorf("failed to load context file: %v", err)
-			_ = util.SendResponse(500, "ai-proxy.minimax.load_ctx_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to load context file: %v", err))
+			util.ErrorHandler("ai-proxy.minimax.load_ctx_failed", fmt.Errorf("failed to load context file: %v", err))
 		}
 		// 由于 minimaxChatCompletionV2（格式和 OpenAI 一致）和 minimaxChatCompletionPro（格式和 OpenAI 不一致）中 insertHttpContextMessage 的逻辑不同，无法做到同一个 provider 统一
 		// 因此对于 minimaxChatCompletionPro 需要手动处理 context 消息
 		// minimaxChatCompletionV2 交给默认的 defaultInsertHttpContextMessage 方法插入 context 消息
 		minimaxRequest := m.buildMinimaxChatCompletionV2Request(request, content)
 		if err := replaceJsonRequestBody(minimaxRequest, log); err != nil {
-			_ = util.SendResponse(500, "ai-proxy.minimax.insert_ctx_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to replace Request body: %v", err))
+			util.ErrorHandler("ai-proxy.minimax.insert_ctx_failed", fmt.Errorf("failed to replace Request body: %v", err))
 		}
 	}, log)
 	if err == nil {

plugins/wasm-go/extensions/ai-proxy/provider/moonshot.go

@@ -94,12 +94,12 @@ func (m *moonshotProvider) OnRequestBody(ctx wrapper.HttpContext, apiName ApiNam
 		}()
 		if err != nil {
 			log.Errorf("failed to load context file: %v", err)
-			_ = util.SendResponse(500, "ai-proxy.moonshot.load_ctx_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to load context file: %v", err))
+			util.ErrorHandler("ai-proxy.moonshot.load_ctx_failed", fmt.Errorf("failed to load context file: %v", err))
 			return
 		}
 		err = m.performChatCompletion(ctx, content, request, log)
 		if err != nil {
-			_ = util.SendResponse(500, "ai-proxy.moonshot.insert_ctx_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to perform chat completion: %v", err))
+			util.ErrorHandler("ai-proxy.moonshot.insert_ctx_failed", fmt.Errorf("failed to perform chat completion: %v", err))
 		}
 	}, log)
 	if err == nil {

plugins/wasm-go/extensions/ai-proxy/util/http.go

@@ -13,8 +13,10 @@ const (
 	MimeTypeApplicationJson = "application/json"
 )
 
-func SendResponse(statusCode uint32, statusCodeDetails string, contentType, body string) error {
-	return proxywasm.SendHttpResponseWithDetail(statusCode, statusCodeDetails, CreateHeaders(HeaderContentType, contentType), []byte(body), -1)
+type ErrorHandlerFunc func(statusCodeDetails string, err error) error
+
+var ErrorHandler ErrorHandlerFunc = func(statusCodeDetails string, err error) error {
+	return proxywasm.SendHttpResponseWithDetail(500, statusCodeDetails, CreateHeaders(HeaderContentType, MimeTypeTextPlain), []byte(err.Error()), -1)
 }
 
 func CreateHeaders(kvs ...string) [][2]string {