feat: convert markdown to mml

internal/service/recognition_service.go

@@ -7,6 +7,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"mime/multipart"
 	"net/http"
 	"strings"
 	"time"
@@ -996,6 +997,12 @@ func (s *RecognitionService) processBaiduOCRTask(ctx context.Context, taskID int
 	}
 	markdownResult := strings.Join(markdownTexts, "\n\n---\n\n")
 
+	latex, mml, err := s.HandleConvert(ctx, markdownResult)
+	if err != nil {
+		log.Error(ctx, "func", "processBaiduOCRTask", "msg", "转换失败", "error", err)
+		return err
+	}
+
 	// 更新或创建识别结果
 	resultDao := dao.NewRecognitionResultDao()
 	result, err := resultDao.GetByTaskID(dao.DB.WithContext(ctx), taskID)
@@ -1012,6 +1019,8 @@ func (s *RecognitionService) processBaiduOCRTask(ctx context.Context, taskID int
 			TaskID:   taskID,
 			TaskType: dao.TaskTypeFormula,
 			Markdown: markdownResult,
+			Latex:    latex,
+			MathML:   mml,
 		})
 		if err != nil {
 			log.Error(ctx, "func", "processBaiduOCRTask", "msg", "创建任务结果失败", "error", err)
@@ -1021,6 +1030,8 @@ func (s *RecognitionService) processBaiduOCRTask(ctx context.Context, taskID int
 		// 更新现有结果
 		err = resultDao.Update(dao.DB.WithContext(ctx), result.ID, map[string]interface{}{
 			"markdown": markdownResult,
+			"latex":    latex,
+			"mathml":   mml,
 		})
 		if err != nil {
 			log.Error(ctx, "func", "processBaiduOCRTask", "msg", "更新任务结果失败", "error", err)
@@ -1044,3 +1055,55 @@ func (s *RecognitionService) TestProcessMathpixTask(ctx context.Context, taskID
 	}
 	return s.processMathpixTask(ctx, taskID, task.FileURL)
 }
+
+// ConvertResponse Python 接口返回结构
+type ConvertResponse struct {
+	Latex  string `json:"latex"`
+	MathML string `json:"mathml"`
+	Error  string `json:"error,omitempty"`
+}
+
+func (s *RecognitionService) HandleConvert(ctx context.Context, markdown string) (latex string, mml string, err error) {
+	url := "https://cloud.texpixel.com:10443/doc_converter/v1/convert"
+
+	// 构建 multipart form
+	body := &bytes.Buffer{}
+	writer := multipart.NewWriter(body)
+	_ = writer.WriteField("markdown_input", markdown)
+	writer.Close()
+
+	// 使用正确的 Content-Type（包含 boundary）
+	headers := map[string]string{
+		"Content-Type": writer.FormDataContentType(),
+	}
+
+	resp, err := s.httpClient.RequestWithRetry(ctx, http.MethodPost, url, body, headers)
+	if err != nil {
+		return "", "", err
+	}
+	defer resp.Body.Close()
+
+	// 读取响应体
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return "", "", err
+	}
+
+	// 检查 HTTP 状态码
+	if resp.StatusCode != http.StatusOK {
+		return "", "", fmt.Errorf("convert failed: status %d, body: %s", resp.StatusCode, string(respBody))
+	}
+
+	// 解析 JSON 响应
+	var convertResp ConvertResponse
+	if err := json.Unmarshal(respBody, &convertResp); err != nil {
+		return "", "", fmt.Errorf("unmarshal response failed: %v, body: %s", err, string(respBody))
+	}
+
+	// 检查业务错误
+	if convertResp.Error != "" {
+		return "", "", fmt.Errorf("convert error: %s", convertResp.Error)
+	}
+
+	return convertResp.Latex, convertResp.MathML, nil
+}