mirror of
https://github.com/infiniflow/ragflow.git
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84edf539e7
### What problem does this PR solve? As title Issue: #15853 ### Type of change - [x] Refactoring
585 lines
16 KiB
Go
585 lines
16 KiB
Go
//
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// Copyright 2026 The InfiniFlow Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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package models
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import (
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"bufio"
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"bytes"
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"context"
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"encoding/base64"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"strings"
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"time"
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)
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// StepFunModel implements ModelDriver for StepFun (阶跃星辰).
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type StepFunModel struct {
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baseModel BaseModel
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}
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// NewStepFunModel creates a new StepFun model instance.
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func NewStepFunModel(baseURL map[string]string, urlSuffix URLSuffix) *StepFunModel {
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transport := http.DefaultTransport.(*http.Transport).Clone()
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transport.MaxIdleConns = 100
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transport.MaxIdleConnsPerHost = 10
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transport.IdleConnTimeout = 90 * time.Second
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transport.DisableCompression = false
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transport.ResponseHeaderTimeout = 60 * time.Second
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return &StepFunModel{
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baseModel: BaseModel{
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BaseURL: baseURL,
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URLSuffix: urlSuffix,
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httpClient: &http.Client{
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Transport: transport,
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},
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},
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}
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}
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func (s *StepFunModel) NewInstance(baseURL map[string]string) ModelDriver {
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return NewStepFunModel(baseURL, s.baseModel.URLSuffix)
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}
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func (s *StepFunModel) Name() string {
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return "stepfun"
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}
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// ChatWithMessages sends multiple messages with roles and returns the response.
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func (s *StepFunModel) ChatWithMessages(modelName string, messages []Message, apiConfig *APIConfig, chatModelConfig *ChatConfig) (*ChatResponse, error) {
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if err := s.baseModel.APIConfigCheck(apiConfig); err != nil {
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return nil, err
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}
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if len(messages) == 0 {
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return nil, fmt.Errorf("messages is empty")
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}
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baseURL, err := s.baseModel.GetBaseURL(apiConfig)
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if err != nil {
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return nil, err
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}
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baseURL = strings.TrimSuffix(baseURL, "/")
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url := fmt.Sprintf("%s/%s", baseURL, s.baseModel.URLSuffix.Chat)
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apiMessages := make([]map[string]interface{}, len(messages))
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for i, msg := range messages {
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apiMessages[i] = map[string]interface{}{
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"role": msg.Role,
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"content": msg.Content,
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}
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}
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reqBody := map[string]interface{}{
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"model": modelName,
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"messages": apiMessages,
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"stream": false,
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}
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if chatModelConfig != nil {
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if chatModelConfig.MaxTokens != nil {
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reqBody["max_tokens"] = *chatModelConfig.MaxTokens
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}
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if chatModelConfig.Temperature != nil {
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reqBody["temperature"] = *chatModelConfig.Temperature
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}
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if chatModelConfig.TopP != nil {
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reqBody["top_p"] = *chatModelConfig.TopP
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}
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if chatModelConfig.Stop != nil {
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reqBody["stop"] = *chatModelConfig.Stop
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}
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}
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jsonData, err := json.Marshal(reqBody)
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if err != nil {
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return nil, fmt.Errorf("failed to marshal request: %w", err)
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}
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ctx, cancel := context.WithTimeout(context.Background(), nonStreamCallTimeout)
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defer cancel()
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req, err := http.NewRequestWithContext(ctx, "POST", url, bytes.NewBuffer(jsonData))
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if err != nil {
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return nil, fmt.Errorf("failed to create request: %w", err)
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}
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req.Header.Set("Content-Type", "application/json")
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req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", *apiConfig.ApiKey))
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resp, err := s.baseModel.httpClient.Do(req)
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if err != nil {
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return nil, fmt.Errorf("failed to send request: %w", err)
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}
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defer resp.Body.Close()
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, fmt.Errorf("failed to read response: %w", err)
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}
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("API request failed with status %d: %s", resp.StatusCode, string(body))
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}
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var result map[string]interface{}
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if err = json.Unmarshal(body, &result); err != nil {
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return nil, fmt.Errorf("failed to parse response: %w", err)
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}
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choices, ok := result["choices"].([]interface{})
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if !ok || len(choices) == 0 {
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return nil, fmt.Errorf("no choices in response")
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}
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firstChoice, ok := choices[0].(map[string]interface{})
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if !ok {
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return nil, fmt.Errorf("invalid choice format")
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}
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messageMap, ok := firstChoice["message"].(map[string]interface{})
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if !ok {
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return nil, fmt.Errorf("invalid message format")
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}
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content, ok := messageMap["content"].(string)
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if !ok {
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return nil, fmt.Errorf("invalid content format")
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}
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emptyReason := ""
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return &ChatResponse{
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Answer: &content,
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ReasonContent: &emptyReason,
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}, nil
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}
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// ChatStreamlyWithSender sends messages and streams the response
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func (s *StepFunModel) ChatStreamlyWithSender(modelName string, messages []Message, apiConfig *APIConfig, chatModelConfig *ChatConfig, sender func(*string, *string) error) error {
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if err := s.baseModel.APIConfigCheck(apiConfig); err != nil {
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return err
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}
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if sender == nil {
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return fmt.Errorf("sender is required")
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}
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if len(messages) == 0 {
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return fmt.Errorf("messages is empty")
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}
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baseURL, err := s.baseModel.GetBaseURL(apiConfig)
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if err != nil {
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return err
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}
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baseURL = strings.TrimSuffix(baseURL, "/")
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url := fmt.Sprintf("%s/%s", baseURL, s.baseModel.URLSuffix.Chat)
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apiMessages := make([]map[string]interface{}, len(messages))
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for i, msg := range messages {
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apiMessages[i] = map[string]interface{}{
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"role": msg.Role,
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"content": msg.Content,
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}
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}
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reqBody := map[string]interface{}{
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"model": modelName,
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"messages": apiMessages,
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"stream": true,
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}
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if chatModelConfig != nil {
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if chatModelConfig.Stream != nil && !*chatModelConfig.Stream {
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return fmt.Errorf("stream must be true in ChatStreamlyWithSender")
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}
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if chatModelConfig.MaxTokens != nil {
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reqBody["max_tokens"] = *chatModelConfig.MaxTokens
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}
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if chatModelConfig.Temperature != nil {
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reqBody["temperature"] = *chatModelConfig.Temperature
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}
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if chatModelConfig.TopP != nil {
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reqBody["top_p"] = *chatModelConfig.TopP
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}
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if chatModelConfig.Stop != nil {
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reqBody["stop"] = *chatModelConfig.Stop
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}
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}
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jsonData, err := json.Marshal(reqBody)
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if err != nil {
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return fmt.Errorf("failed to marshal request: %w", err)
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}
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req, err := http.NewRequestWithContext(context.Background(), "POST", url, bytes.NewBuffer(jsonData))
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if err != nil {
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return fmt.Errorf("failed to create request: %w", err)
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}
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req.Header.Set("Content-Type", "application/json")
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req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", *apiConfig.ApiKey))
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resp, err := s.baseModel.httpClient.Do(req)
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if err != nil {
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return fmt.Errorf("failed to send request: %w", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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body, _ := io.ReadAll(resp.Body)
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return fmt.Errorf("API request failed with status %d: %s", resp.StatusCode, string(body))
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}
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scanner := bufio.NewScanner(resp.Body)
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scanner.Buffer(make([]byte, 64*1024), 1024*1024)
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sawTerminal := false
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for scanner.Scan() {
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line := scanner.Text()
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if !strings.HasPrefix(line, "data:") {
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continue
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}
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data := strings.TrimSpace(line[5:])
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if data == "[DONE]" {
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sawTerminal = true
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break
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}
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var event map[string]interface{}
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if err = json.Unmarshal([]byte(data), &event); err != nil {
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continue
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}
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choices, ok := event["choices"].([]interface{})
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if !ok || len(choices) == 0 {
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continue
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}
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firstChoice, ok := choices[0].(map[string]interface{})
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if !ok {
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continue
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}
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delta, ok := firstChoice["delta"].(map[string]interface{})
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if !ok {
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continue
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}
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content, ok := delta["content"].(string)
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if ok && content != "" {
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if err := sender(&content, nil); err != nil {
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return err
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}
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}
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finishReason, ok := firstChoice["finish_reason"].(string)
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if ok && finishReason != "" {
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sawTerminal = true
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break
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}
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}
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if err := scanner.Err(); err != nil {
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return fmt.Errorf("failed to scan response body: %w", err)
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}
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if !sawTerminal {
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return fmt.Errorf("stepfun: stream ended before [DONE] or finish_reason")
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}
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endOfStream := "[DONE]"
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if err := sender(&endOfStream, nil); err != nil {
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return err
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}
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return nil
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}
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// Embed is left as a stub.
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func (s *StepFunModel) Embed(modelName *string, texts []string, apiConfig *APIConfig, embeddingConfig *EmbeddingConfig) ([]EmbeddingData, error) {
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return nil, fmt.Errorf("not implemented")
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}
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// ListModels returns the list of model ids visible to the API key.
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func (s *StepFunModel) ListModels(apiConfig *APIConfig) ([]ListModelResponse, error) {
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if err := s.baseModel.APIConfigCheck(apiConfig); err != nil {
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return nil, err
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}
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baseURL, err := s.baseModel.GetBaseURL(apiConfig)
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if err != nil {
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return nil, err
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}
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baseURL = strings.TrimSuffix(baseURL, "/")
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url := fmt.Sprintf("%s/%s", baseURL, s.baseModel.URLSuffix.Models)
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ctx, cancel := context.WithTimeout(context.Background(), nonStreamCallTimeout)
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defer cancel()
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req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
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if err != nil {
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return nil, fmt.Errorf("failed to create request: %w", err)
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}
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req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", *apiConfig.ApiKey))
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resp, err := s.baseModel.httpClient.Do(req)
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if err != nil {
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return nil, fmt.Errorf("failed to send request: %w", err)
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}
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defer resp.Body.Close()
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, fmt.Errorf("failed to read response: %w", err)
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}
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("API request failed with status %d: %s", resp.StatusCode, string(body))
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}
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// Parse response
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var modelList ModelList
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if err = json.Unmarshal(body, &modelList); err != nil {
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return nil, fmt.Errorf("failed to parse response: %w", err)
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}
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if modelList.Models == nil {
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return nil, fmt.Errorf("invalid models list format")
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}
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return ParseListModel(modelList), nil
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}
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// Balance is not exposed by the StepFun API, so this returns "no such method".
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func (s *StepFunModel) Balance(apiConfig *APIConfig) (map[string]interface{}, error) {
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return nil, fmt.Errorf("no such method")
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}
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// CheckConnection runs a lightweight ListModels call to verify the API key.
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func (s *StepFunModel) CheckConnection(apiConfig *APIConfig) error {
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_, err := s.ListModels(apiConfig)
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if err != nil {
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return err
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}
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return nil
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}
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// Rerank calculates similarity scores between query and documents. StepFun
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// does not expose a public rerank API, so this returns "no such method".
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func (s *StepFunModel) Rerank(modelName *string, query string, documents []string, apiConfig *APIConfig, rerankConfig *RerankConfig) (*RerankResponse, error) {
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return nil, fmt.Errorf("no such method")
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}
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// TranscribeAudio transcribe audio
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func (s *StepFunModel) TranscribeAudio(modelName *string, file *string, apiConfig *APIConfig, asrConfig *ASRConfig) (*ASRResponse, error) {
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return nil, fmt.Errorf("%s, no such method", s.Name())
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}
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func (s *StepFunModel) TranscribeAudioWithSender(modelName *string, file *string, apiConfig *APIConfig, asrConfig *ASRConfig, sender func(*string, *string) error) error {
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return fmt.Errorf("%s, no such method", s.Name())
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}
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// AudioSpeech convert text to audio
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func (s *StepFunModel) AudioSpeech(modelName *string, audioContent *string, apiConfig *APIConfig, ttsConfig *TTSConfig) (*TTSResponse, error) {
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if err := s.baseModel.APIConfigCheck(apiConfig); err != nil {
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return nil, err
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}
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// TODO Test it
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if audioContent == nil || *audioContent == "" {
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return nil, fmt.Errorf("audio content is empty")
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}
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resolvedBaseURL, err := s.baseModel.GetBaseURL(apiConfig)
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if err != nil {
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return nil, err
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}
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url := fmt.Sprintf("%s/%s", resolvedBaseURL, s.baseModel.URLSuffix.TTS)
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reqBody := map[string]interface{}{
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"model": *modelName,
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"input": *audioContent,
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}
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if ttsConfig != nil && ttsConfig.Params != nil {
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for key, value := range ttsConfig.Params {
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reqBody[key] = value
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}
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}
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if ttsConfig != nil && ttsConfig.Format != "" {
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reqBody["response_format"] = ttsConfig.Format
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}
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jsonData, err := json.Marshal(reqBody)
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if err != nil {
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return nil, fmt.Errorf("failed to marshal request: %w", err)
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}
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req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonData))
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if err != nil {
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return nil, fmt.Errorf("failed to create request: %w", err)
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}
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req.Header.Set("Content-Type", "application/json")
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req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", *apiConfig.ApiKey))
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resp, err := s.baseModel.httpClient.Do(req)
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if err != nil {
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return nil, fmt.Errorf("failed to send request: %w", err)
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}
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defer resp.Body.Close()
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, fmt.Errorf("failed to read response body: %w", err)
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}
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("%s - %s", resp.Status, string(body))
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}
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return &TTSResponse{Audio: body}, nil
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}
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// AudioSpeechWithSender for Streaming TTS
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func (s *StepFunModel) AudioSpeechWithSender(modelName *string, audioContent *string, apiConfig *APIConfig, ttsConfig *TTSConfig, sender func(*string, *string) error) error {
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if err := s.baseModel.APIConfigCheck(apiConfig); err != nil {
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return err
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}
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if audioContent == nil || *audioContent == "" {
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return fmt.Errorf("audio content is empty")
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}
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resolvedBaseURL, err := s.baseModel.GetBaseURL(apiConfig)
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if err != nil {
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return err
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}
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url := fmt.Sprintf("%s/%s", resolvedBaseURL, s.baseModel.URLSuffix.TTS)
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reqBody := map[string]interface{}{
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"model": *modelName,
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"input": *audioContent,
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"stream_format": "sse",
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}
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if ttsConfig != nil && ttsConfig.Params != nil {
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for key, value := range ttsConfig.Params {
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reqBody[key] = value
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}
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}
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if ttsConfig != nil && ttsConfig.Format != "" {
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reqBody["response_format"] = ttsConfig.Format
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}
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jsonData, err := json.Marshal(reqBody)
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if err != nil {
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return fmt.Errorf("failed to marshal request: %w", err)
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}
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req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonData))
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if err != nil {
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return fmt.Errorf("failed to create request: %w", err)
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}
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req.Header.Set("Content-Type", "application/json")
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req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", *apiConfig.ApiKey))
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resp, err := s.baseModel.httpClient.Do(req)
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if err != nil {
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return fmt.Errorf("failed to send request: %w", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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body, _ := io.ReadAll(resp.Body)
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return fmt.Errorf("StepFun stream TTS API error: %d - %s", resp.StatusCode, string(body))
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}
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scanner := bufio.NewScanner(resp.Body)
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scanner.Buffer(make([]byte, 64*1024), 8*1024*1024)
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for scanner.Scan() {
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line := scanner.Text()
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if !strings.HasPrefix(line, "data: ") {
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continue
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}
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dataStr := strings.TrimSpace(line[6:])
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// [DONE]
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if dataStr == "" || dataStr == "[DONE]" {
|
|
continue
|
|
}
|
|
|
|
// Parse
|
|
var event struct {
|
|
Type string `json:"type"`
|
|
Audio string `json:"audio"`
|
|
}
|
|
|
|
if err := json.Unmarshal([]byte(dataStr), &event); err != nil {
|
|
continue
|
|
}
|
|
|
|
if event.Type == "speech.audio.error" {
|
|
return fmt.Errorf("StepFun stream encountered an error during generation")
|
|
}
|
|
|
|
// Extract the Base64 string containing the audio and decode it
|
|
if event.Type == "speech.audio.delta" && event.Audio != "" {
|
|
audioBytes, err := base64.StdEncoding.DecodeString(event.Audio)
|
|
if err == nil && len(audioBytes) > 0 {
|
|
chunk := string(audioBytes)
|
|
if errSend := sender(&chunk, nil); errSend != nil {
|
|
return errSend
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if err := scanner.Err(); err != nil {
|
|
return fmt.Errorf("error reading StepFun stream: %w", err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// OCRFile OCR file
|
|
func (s *StepFunModel) OCRFile(modelName *string, content []byte, url *string, apiConfig *APIConfig, ocrConfig *OCRConfig) (*OCRFileResponse, error) {
|
|
return nil, fmt.Errorf("%s, no such method", s.Name())
|
|
}
|
|
|
|
// ParseFile parse file
|
|
func (s *StepFunModel) ParseFile(modelName *string, content []byte, url *string, apiConfig *APIConfig, parseFileConfig *ParseFileConfig) (*ParseFileResponse, error) {
|
|
return nil, fmt.Errorf("%s, no such method", s.Name())
|
|
}
|
|
|
|
func (s *StepFunModel) ListTasks(apiConfig *APIConfig) ([]ListTaskStatus, error) {
|
|
return nil, fmt.Errorf("%s, no such method", s.Name())
|
|
}
|
|
|
|
func (s *StepFunModel) ShowTask(taskID string, apiConfig *APIConfig) (*TaskResponse, error) {
|
|
return nil, fmt.Errorf("%s, no such method", s.Name())
|
|
}
|