feat: able to approximate token (close #207)

common/constants.go

@@ -67,6 +67,7 @@ var ChannelDisableThreshold = 5.0
 var AutomaticDisableChannelEnabled = false
 var QuotaRemindThreshold = 1000
 var PreConsumedQuota = 500
+var ApproximateTokenEnabled = false
 
 var RootUserEmail = ""
 

controller/relay-utils.go

@@ -24,6 +24,13 @@ func getTokenEncoder(model string) *tiktoken.Tiktoken {
 	return tokenEncoder
 }
 
+func getTokenNum(tokenEncoder *tiktoken.Tiktoken, text string) int {
+	if common.ApproximateTokenEnabled {
+		return int(float64(len(text)) * 0.38)
+	}
+	return len(tokenEncoder.Encode(text, nil, nil))
+}
+
 func countTokenMessages(messages []Message, model string) int {
 	tokenEncoder := getTokenEncoder(model)
 	// Reference:
@@ -43,11 +50,11 @@ func countTokenMessages(messages []Message, model string) int {
 	tokenNum := 0
 	for _, message := range messages {
 		tokenNum += tokensPerMessage
-		tokenNum += len(tokenEncoder.Encode(message.Content, nil, nil))
-		tokenNum += len(tokenEncoder.Encode(message.Role, nil, nil))
+		tokenNum += getTokenNum(tokenEncoder, message.Content)
+		tokenNum += getTokenNum(tokenEncoder, message.Role)
 		if message.Name != nil {
 			tokenNum += tokensPerName
-			tokenNum += len(tokenEncoder.Encode(*message.Name, nil, nil))
+			tokenNum += getTokenNum(tokenEncoder, *message.Name)
 		}
 	}
 	tokenNum += 3 // Every reply is primed with <|start|>assistant<|message|>
@@ -70,8 +77,7 @@ func countTokenInput(input any, model string) int {
 
 func countTokenText(text string, model string) int {
 	tokenEncoder := getTokenEncoder(model)
-	token := tokenEncoder.Encode(text, nil, nil)
-	return len(token)
+	return getTokenNum(tokenEncoder, text)
 }
 
 func errorWrapper(err error, code string, statusCode int) *OpenAIErrorWithStatusCode {

model/option.go

@@ -34,6 +34,7 @@ func InitOptionMap() {
 	common.OptionMap["TurnstileCheckEnabled"] = strconv.FormatBool(common.TurnstileCheckEnabled)
 	common.OptionMap["RegisterEnabled"] = strconv.FormatBool(common.RegisterEnabled)
 	common.OptionMap["AutomaticDisableChannelEnabled"] = strconv.FormatBool(common.AutomaticDisableChannelEnabled)
+	common.OptionMap["ApproximateTokenEnabled"] = strconv.FormatBool(common.ApproximateTokenEnabled)
 	common.OptionMap["LogConsumeEnabled"] = strconv.FormatBool(common.LogConsumeEnabled)
 	common.OptionMap["DisplayInCurrencyEnabled"] = strconv.FormatBool(common.DisplayInCurrencyEnabled)
 	common.OptionMap["DisplayTokenStatEnabled"] = strconv.FormatBool(common.DisplayTokenStatEnabled)
@@ -141,6 +142,8 @@ func updateOptionMap(key string, value string) (err error) {
 			common.RegisterEnabled = boolValue
 		case "AutomaticDisableChannelEnabled":
 			common.AutomaticDisableChannelEnabled = boolValue
+		case "ApproximateTokenEnabled":
+			common.ApproximateTokenEnabled = boolValue
 		case "LogConsumeEnabled":
 			common.LogConsumeEnabled = boolValue
 		case "DisplayInCurrencyEnabled":

web/src/components/OperationSetting.js

@@ -18,7 +18,8 @@ const OperationSetting = () => {
     ChannelDisableThreshold: 0,
     LogConsumeEnabled: '',
     DisplayInCurrencyEnabled: '',
-    DisplayTokenStatEnabled: ''
+    DisplayTokenStatEnabled: '',
+    ApproximateTokenEnabled: '',
   });
   const [originInputs, setOriginInputs] = useState({});
   let [loading, setLoading] = useState(false);
@@ -181,6 +182,12 @@ const OperationSetting = () => {
               name='DisplayTokenStatEnabled'
               onChange={handleInputChange}
             />
+            <Form.Checkbox
+              checked={inputs.ApproximateTokenEnabled === 'true'}
+              label='使用近似的方式估算 token 数以减少计算量'
+              name='ApproximateTokenEnabled'
+              onChange={handleInputChange}
+            />
           </Form.Group>
           <Form.Button onClick={() => {
             submitConfig('general').then();