feat: support baidu ernie bot ai model (#1024)

Co-authored-by: Kent Dong <ch3cho@qq.com>
2026-03-03 16:10:48 +08:00 · 2024-06-06 18:19:55 +08:00
parent c6e3db95e0
commit 2db0b60a98
3 changed files with 405 additions and 2 deletions
--- a/plugins/wasm-go/extensions/ai-proxy/README.md
+++ b/plugins/wasm-go/extensions/ai-proxy/README.md
@@ -21,7 +21,7 @@ description: AI 代理插件配置参考

 | 名称             | 数据类型            | 填写要求 | 默认值 | 描述                                                                               |
 |----------------|-----------------|------|-----|----------------------------------------------------------------------------------|
-| `type`         | string          | 必填   | -   | AI 服务提供商名称。目前支持以下取值：openai, azure, moonshot, qwen, zhipuai                                |
+| `type`         | string          | 必填   | -   | AI 服务提供商名称。目前支持以下取值：openai, azure, moonshot, qwen, zhipuai, baidu                |
 | `apiTokens`    | array of string | 必填   | -   | 用于在访问 AI 服务时进行认证的令牌。如果配置了多个 token，插件会在请求时随机进行选择。部分服务提供商只支持配置一个 token。            |
 | `timeout`      | number          | 非必填  | -   | 访问 AI 服务的超时时间。单位为毫秒。默认值为 120000，即 2 分钟                                           |
 | `modelMapping` | map of string   | 非必填  | -   | AI 模型映射表，用于将请求中的模型名称映射为服务提供商支持模型名称。<br/>可以使用 "*" 为键来配置通用兜底映射关系                   |
@@ -89,6 +89,10 @@ DeepSeek所对应的 `type` 为 `deepseek`。它并无特有的配置字段。

 Groq 所对应的 `type` 为 `groq`。它并无特有的配置字段。

+#### 文心一言（Baidu）
+
+文心一言所对应的 `type` 为 `baidu`。它并无特有的配置字段。
+
 #### Anthropic Claude

 Anthropic Claude 所对应的 `type` 为 `claude`。它特有的配置字段如下：
@@ -621,6 +625,61 @@ curl --location 'http://<your higress domain>/v1/chat/completions' \
 }
 ```

+### 使用 OpenAI 协议代理百度文心一言服务
+
+**配置信息**
+
+```yaml
+provider:
+  type: baidu
+  apiTokens:
+    - "YOUR_BAIDU_API_TOKEN"
+  modelMapping:
+    'gpt-3': "ERNIE-4.0"
+    '*': "ERNIE-4.0"
+```
+
+**请求示例**
+
+```json
+{
+    "model": "gpt-4-turbo",
+    "messages": [
+        {
+            "role": "user",
+            "content": "你好，你是谁？"
+        }
+    ],
+    "stream": false
+}
+```
+
+**响应示例**
+
+```json
+{
+    "id": "as-e90yfg1pk1",
+    "choices": [
+        {
+            "index": 0,
+            "message": {
+                "role": "assistant",
+                "content": "你好，我是文心一言，英文名是ERNIE Bot。我能够与人对话互动，回答问题，协助创作，高效便捷地帮助人们获取信息、知识和灵感。"
+            },
+            "finish_reason": "stop"
+        }
+    ],
+    "created": 1717251488,
+    "model": "ERNIE-4.0",
+    "object": "chat.completion",
+    "usage": {
+        "prompt_tokens": 4,
+        "completion_tokens": 33,
+        "total_tokens": 37
+    }
+}
+```
+
 ## 完整配置示例

 以下以使用 OpenAI 协议代理 Groq 服务为例，展示完整的插件配置示例。
--- a/plugins/wasm-go/extensions/ai-proxy/provider/baidu.go
+++ b/plugins/wasm-go/extensions/ai-proxy/provider/baidu.go
@@ -0,0 +1,340 @@
+package provider
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/alibaba/higress/plugins/wasm-go/extensions/ai-proxy/util"
+	"github.com/alibaba/higress/plugins/wasm-go/pkg/wrapper"
+	"github.com/higress-group/proxy-wasm-go-sdk/proxywasm"
+	"github.com/higress-group/proxy-wasm-go-sdk/proxywasm/types"
+)
+
+// baiduProvider is the provider for baidu ernie bot service.
+
+const (
+	baiduDomain = "aip.baidubce.com"
+)
+
+var baiduModelToPathSuffixMap = map[string]string{
+	"ERNIE-4.0-8K":     "completions_pro",
+	"ERNIE-3.5-8K":     "completions",
+	"ERNIE-3.5-128K":   "ernie-3.5-128k",
+	"ERNIE-Speed-8K":   "ernie_speed",
+	"ERNIE-Speed-128K": "ernie-speed-128k",
+	"ERNIE-Tiny-8K":    "ernie-tiny-8k",
+	"ERNIE-Bot-8K":     "ernie_bot_8k",
+	"BLOOMZ-7B":        "bloomz_7b1",
+}
+
+type baiduProviderInitializer struct {
+}
+
+func (b *baiduProviderInitializer) ValidateConfig(config ProviderConfig) error {
+	return nil
+}
+
+func (b *baiduProviderInitializer) CreateProvider(config ProviderConfig) (Provider, error) {
+	return &baiduProvider{
+		config:       config,
+		contextCache: createContextCache(&config),
+	}, nil
+}
+
+type baiduProvider struct {
+	config       ProviderConfig
+	contextCache *contextCache
+}
+
+func (b *baiduProvider) GetProviderType() string {
+	return providerTypeBaidu
+}
+
+func (b *baiduProvider) OnRequestHeaders(ctx wrapper.HttpContext, apiName ApiName, log wrapper.Log) (types.Action, error) {
+	if apiName != ApiNameChatCompletion {
+		return types.ActionContinue, errUnsupportedApiName
+	}
+	_ = util.OverwriteRequestHost(baiduDomain)
+
+	_ = proxywasm.RemoveHttpRequestHeader("Accept-Encoding")
+	_ = proxywasm.RemoveHttpRequestHeader("Content-Length")
+
+	// Delay the header processing to allow changing streaming mode in OnRequestBody
+	return types.HeaderStopIteration, nil
+}
+
+func (b *baiduProvider) OnRequestBody(ctx wrapper.HttpContext, apiName ApiName, body []byte, log wrapper.Log) (types.Action, error) {
+	if apiName != ApiNameChatCompletion {
+		return types.ActionContinue, errUnsupportedApiName
+	}
+	// 使用文心一言接口协议
+	if b.config.protocol == protocolOriginal {
+		request := &baiduTextGenRequest{}
+		if err := json.Unmarshal(body, request); err != nil {
+			return types.ActionContinue, fmt.Errorf("unable to unmarshal request: %v", err)
+		}
+		if request.Model == "" {
+			return types.ActionContinue, errors.New("request model is empty")
+		}
+		// 根据模型重写requestPath
+		path := b.GetRequestPath(request.Model)
+		_ = util.OverwriteRequestPath(path)
+
+		if b.config.context == nil {
+			return types.ActionContinue, nil
+		}
+
+		err := b.contextCache.GetContent(func(content string, err error) {
+			defer func() {
+				_ = proxywasm.ResumeHttpRequest()
+			}()
+
+			if err != nil {
+				log.Errorf("failed to load context file: %v", err)
+				_ = util.SendResponse(500, util.MimeTypeTextPlain, fmt.Sprintf("failed to load context file: %v", err))
+			}
+			b.setSystemContent(request, content)
+			if err := replaceJsonRequestBody(request, log); err != nil {
+				_ = util.SendResponse(500, util.MimeTypeTextPlain, fmt.Sprintf("failed to replace request body: %v", err))
+			}
+		}, log)
+		if err == nil {
+			return types.ActionPause, nil
+		}
+		return types.ActionContinue, err
+	}
+	request := &chatCompletionRequest{}
+	if err := decodeChatCompletionRequest(body, request); err != nil {
+		return types.ActionContinue, err
+	}
+
+	// 映射模型重写requestPath
+	model := request.Model
+	if model == "" {
+		return types.ActionContinue, errors.New("missing model in chat completion request")
+	}
+	ctx.SetContext(ctxKeyOriginalRequestModel, model)
+	mappedModel := getMappedModel(model, b.config.modelMapping, log)
+	if mappedModel == "" {
+		return types.ActionContinue, errors.New("model becomes empty after applying the configured mapping")
+	}
+	request.Model = mappedModel
+	ctx.SetContext(ctxKeyFinalRequestModel, request.Model)
+	path := b.GetRequestPath(mappedModel)
+	_ = util.OverwriteRequestPath(path)
+
+	if b.config.context == nil {
+		baiduRequest := b.baiduTextGenRequest(request)
+		return types.ActionContinue, replaceJsonRequestBody(baiduRequest, log)
+	}
+
+	err := b.contextCache.GetContent(func(content string, err error) {
+		defer func() {
+			_ = proxywasm.ResumeHttpRequest()
+		}()
+		if err != nil {
+			log.Errorf("failed to load context file: %v", err)
+			_ = util.SendResponse(500, util.MimeTypeTextPlain, fmt.Sprintf("failed to load context file: %v", err))
+		}
+		insertContextMessage(request, content)
+		baiduRequest := b.baiduTextGenRequest(request)
+		if err := replaceJsonRequestBody(baiduRequest, log); err != nil {
+			_ = util.SendResponse(500, util.MimeTypeTextPlain, fmt.Sprintf("failed to replace Request body: %v", err))
+		}
+	}, log)
+	if err == nil {
+		return types.ActionPause, nil
+	}
+	return types.ActionContinue, err
+}
+
+func (b *baiduProvider) OnResponseHeaders(ctx wrapper.HttpContext, apiName ApiName, log wrapper.Log) (types.Action, error) {
+	// 使用文心一言接口协议,跳过OnStreamingResponseBody()和OnResponseBody()
+	if b.config.protocol == protocolOriginal {
+		ctx.DontReadResponseBody()
+		return types.ActionContinue, nil
+	}
+
+	_ = proxywasm.RemoveHttpResponseHeader("Content-Length")
+	return types.ActionContinue, nil
+}
+
+func (b *baiduProvider) OnStreamingResponseBody(ctx wrapper.HttpContext, name ApiName, chunk []byte, isLastChunk bool, log wrapper.Log) ([]byte, error) {
+	if isLastChunk || len(chunk) == 0 {
+		return nil, nil
+	}
+	// sample event response:
+	// data: {"id":"as-vb0m37ti8y","object":"chat.completion","created":1709089502,"sentence_id":0,"is_end":false,"is_truncated":false,"result":"当然可以，","need_clear_history":false,"finish_reason":"normal","usage":{"prompt_tokens":5,"completion_tokens":2,"total_tokens":7}}
+
+	// sample end event response:
+	// data: {"id":"as-vb0m37ti8y","object":"chat.completion","created":1709089531,"sentence_id":20,"is_end":true,"is_truncated":false,"result":"","need_clear_history":false,"finish_reason":"normal","usage":{"prompt_tokens":5,"completion_tokens":420,"total_tokens":425}}
+	responseBuilder := &strings.Builder{}
+	lines := strings.Split(string(chunk), "\n")
+	for _, data := range lines {
+		if len(data) < 6 {
+			// ignore blank line or wrong format
+			continue
+		}
+		data = data[6:]
+		var baiduResponse baiduTextGenStreamResponse
+		if err := json.Unmarshal([]byte(data), &baiduResponse); err != nil {
+			log.Errorf("unable to unmarshal baidu response: %v", err)
+			continue
+		}
+		response := b.streamResponseBaidu2OpenAI(ctx, &baiduResponse)
+		responseBody, err := json.Marshal(response)
+		if err != nil {
+			log.Errorf("unable to marshal response: %v", err)
+			return nil, err
+		}
+		b.appendResponse(responseBuilder, string(responseBody))
+	}
+	modifiedResponseChunk := responseBuilder.String()
+	log.Debugf("=== modified response chunk: %s", modifiedResponseChunk)
+	return []byte(modifiedResponseChunk), nil
+}
+
+func (b *baiduProvider) OnResponseBody(ctx wrapper.HttpContext, apiName ApiName, body []byte, log wrapper.Log) (types.Action, error) {
+	baiduResponse := &baiduTextGenResponse{}
+	if err := json.Unmarshal(body, baiduResponse); err != nil {
+		return types.ActionContinue, fmt.Errorf("unable to unmarshal baidu response: %v", err)
+	}
+	if baiduResponse.ErrorMsg != "" {
+		return types.ActionContinue, fmt.Errorf("baidu response error, error_code: %d, error_message: %s", baiduResponse.ErrorCode, baiduResponse.ErrorMsg)
+	}
+	response := b.responseBaidu2OpenAI(ctx, baiduResponse)
+	return types.ActionContinue, replaceJsonResponseBody(response, log)
+}
+
+type baiduTextGenRequest struct {
+	Model           string        `json:"model"`
+	Messages        []chatMessage `json:"messages"`
+	Temperature     float64       `json:"temperature,omitempty"`
+	TopP            float64       `json:"top_p,omitempty"`
+	PenaltyScore    float64       `json:"penalty_score,omitempty"`
+	Stream          bool          `json:"stream,omitempty"`
+	System          string        `json:"system,omitempty"`
+	DisableSearch   bool          `json:"disable_search,omitempty"`
+	EnableCitation  bool          `json:"enable_citation,omitempty"`
+	MaxOutputTokens int           `json:"max_output_tokens,omitempty"`
+	UserId          string        `json:"user_id,omitempty"`
+}
+
+func (b *baiduProvider) GetRequestPath(baiduModel string) string {
+	// https://cloud.baidu.com/doc/WENXINWORKSHOP/s/clntwmv7t
+	suffix, ok := baiduModelToPathSuffixMap[baiduModel]
+	if !ok {
+		suffix = baiduModel
+	}
+	return fmt.Sprintf("/rpc/2.0/ai_custom/v1/wenxinworkshop/chat/%s?access_token=%s", suffix, b.config.GetRandomToken())
+}
+
+func (b *baiduProvider) setSystemContent(request *baiduTextGenRequest, content string) {
+	request.System = content
+}
+
+func (b *baiduProvider) baiduTextGenRequest(request *chatCompletionRequest) *baiduTextGenRequest {
+	baiduRequest := baiduTextGenRequest{
+		Messages:        make([]chatMessage, 0, len(request.Messages)),
+		Temperature:     request.Temperature,
+		TopP:            request.TopP,
+		PenaltyScore:    request.FrequencyPenalty,
+		Stream:          request.Stream,
+		DisableSearch:   false,
+		EnableCitation:  false,
+		MaxOutputTokens: request.MaxTokens,
+		UserId:          request.User,
+	}
+	for _, message := range request.Messages {
+		if message.Role == roleSystem {
+			baiduRequest.System = message.Content
+		} else {
+			baiduRequest.Messages = append(baiduRequest.Messages, chatMessage{
+				Role:    message.Role,
+				Content: message.Content,
+			})
+		}
+	}
+	return &baiduRequest
+}
+
+type baiduTextGenResponse struct {
+	Id               string                    `json:"id"`
+	Object           string                    `json:"object"`
+	Created          int64                     `json:"created"`
+	Result           string                    `json:"result"`
+	IsTruncated      bool                      `json:"is_truncated"`
+	NeedClearHistory bool                      `json:"need_clear_history"`
+	Usage            baiduTextGenResponseUsage `json:"usage"`
+	baiduTextGenResponseError
+}
+
+type baiduTextGenResponseError struct {
+	ErrorCode int    `json:"error_code"`
+	ErrorMsg  string `json:"error_msg"`
+}
+
+type baiduTextGenStreamResponse struct {
+	baiduTextGenResponse
+	SentenceId int  `json:"sentence_id"`
+	IsEnd      bool `json:"is_end"`
+}
+
+type baiduTextGenResponseUsage struct {
+	PromptTokens     int `json:"prompt_tokens"`
+	CompletionTokens int `json:"completion_tokens"`
+	TotalTokens      int `json:"total_tokens"`
+}
+
+func (b *baiduProvider) responseBaidu2OpenAI(ctx wrapper.HttpContext, response *baiduTextGenResponse) *chatCompletionResponse {
+	choice := chatCompletionChoice{
+		Index:        0,
+		Message:      &chatMessage{Role: roleAssistant, Content: response.Result},
+		FinishReason: finishReasonStop,
+	}
+	return &chatCompletionResponse{
+		Id:                response.Id,
+		Created:           time.Now().UnixMilli() / 1000,
+		Model:             ctx.GetContext(ctxKeyFinalRequestModel).(string),
+		SystemFingerprint: "",
+		Object:            objectChatCompletion,
+		Choices:           []chatCompletionChoice{choice},
+		Usage: chatCompletionUsage{
+			PromptTokens:     response.Usage.PromptTokens,
+			CompletionTokens: response.Usage.CompletionTokens,
+			TotalTokens:      response.Usage.TotalTokens,
+		},
+	}
+}
+
+func (b *baiduProvider) streamResponseBaidu2OpenAI(ctx wrapper.HttpContext, response *baiduTextGenStreamResponse) *chatCompletionResponse {
+	choice := chatCompletionChoice{
+		Index:   0,
+		Message: &chatMessage{Role: roleAssistant, Content: response.Result},
+	}
+	if response.IsEnd {
+		choice.FinishReason = finishReasonStop
+	}
+	return &chatCompletionResponse{
+		Id:                response.Id,
+		Created:           time.Now().UnixMilli() / 1000,
+		Model:             ctx.GetContext(ctxKeyFinalRequestModel).(string),
+		SystemFingerprint: "",
+		Object:            objectChatCompletion,
+		Choices:           []chatCompletionChoice{choice},
+		Usage: chatCompletionUsage{
+			PromptTokens:     response.Usage.PromptTokens,
+			CompletionTokens: response.Usage.CompletionTokens,
+			TotalTokens:      response.Usage.TotalTokens,
+		},
+	}
+}
+
+func (b *baiduProvider) appendResponse(responseBuilder *strings.Builder, responseBody string) {
+	responseBuilder.WriteString(streamDataItemKey)
+	responseBuilder.WriteString(responseBody)
+	responseBuilder.WriteString("\n\n")
+}
--- a/plugins/wasm-go/extensions/ai-proxy/provider/provider.go
+++ b/plugins/wasm-go/extensions/ai-proxy/provider/provider.go
@@ -25,6 +25,7 @@ const (
 	providerTypeDeepSeek = "deepseek"
 	providerTypeZhipuAi  = "zhipuai"
 	providerTypeOllama   = "ollama"
+	providerTypeBaidu    = "baidu"
 	providerTypeHunyuan  = "hunyuan"

 	protocolOpenAI   = "openai"
@@ -34,6 +35,8 @@ const (
 	roleUser      = "user"
 	roleAssistant = "assistant"

+	finishReasonStop = "stop"
+
 	ctxKeyIncrementalStreaming = "incrementalStreaming"
 	ctxKeyApiName              = "apiKey"
 	ctxKeyStreamingBody        = "streamingBody"
@@ -68,6 +71,7 @@ var (
 		providerTypeDeepSeek: &deepseekProviderInitializer{},
 		providerTypeZhipuAi:  &zhipuAiProviderInitializer{},
 		providerTypeOllama:   &ollamaProviderInitializer{},
+		providerTypeBaidu:    &baiduProviderInitializer{},
 		providerTypeHunyuan:  &hunyuanProviderInitializer{},
 	}
 )
@@ -98,7 +102,7 @@ type ResponseBodyHandler interface {

 type ProviderConfig struct {
 	// @Title zh-CN AI服务提供商
-	// @Description zh-CN AI服务提供商类型，目前支持的取值为："moonshot"、"qwen"、"openai"、"azure"、"baichuan"、"yi"、"zhipuai"、"ollama"
+	// @Description zh-CN AI服务提供商类型，目前支持的取值为："moonshot"、"qwen"、"openai"、"azure"、"baichuan"、"yi"、"zhipuai"、"ollama"、"baidu"
 	typ string `required:"true" yaml:"type" json:"type"`
 	// @Title zh-CN API Tokens
 	// @Description zh-CN 在请求AI服务时用于认证的API Token列表。不同的AI服务提供商可能有不同的名称。部分供应商只支持配置一个API Token（如Azure OpenAI）。