tam

server/internal/handlers/handlers_exam.go

@@ -919,12 +919,13 @@ func GetStudentExamPaperFilesHandler(db *gorm.DB) fiber.Handler {
 			resList = append(resList, fiber.Map{
 				"id":       r.ID,
 				"fileName": r.FileName,
-				"url":      fmt.Sprintf("/api/student/exam/download?studentRkId=%d&kind=resource&fileId=%d", studentID, r.ID),
+				"url":      fmt.Sprintf("/api/student/exam/download?studentRkId=%d&kind=resource&fileId=%d&view=1", studentID, r.ID),
+				"downloadUrl": fmt.Sprintf("/api/student/exam/download?studentRkId=%d&kind=resource&fileId=%d", studentID, r.ID),
 			})
 		}
 		return c.JSON(fiber.Map{
 			"paperTitle": info.Paper.Title,
-			"pdfUrl":     fmt.Sprintf("/api/student/exam/download?studentRkId=%d&kind=pdf", studentID),
+			"pdfUrl":     fmt.Sprintf("/api/student/exam/download?studentRkId=%d&kind=pdf&view=1", studentID),
 			"resources":  resList,
 		})
 	}
@@ -941,19 +942,61 @@ func DownloadStudentExamFileHandler(db *gorm.DB) fiber.Handler {
 		if info == nil || info.Enrollment.PaperSentAt == nil || info.Paper == nil {
 			return c.Status(403).JSON(fiber.Map{"error": "Không có quyền"})
 		}
+		inline := c.Query("view") == "1" || c.Query("inline") == "1"
 		kind := c.Query("kind", "pdf")
 		if kind == "pdf" {
-			return c.Download(info.Paper.PdfPath, filepath.Base(info.Paper.PdfPath))
+			name := filepath.Base(info.Paper.PdfPath)
+			if inline {
+				return sendExamFileInline(c, info.Paper.PdfPath, name)
+			}
+			return c.Download(info.Paper.PdfPath, name)
 		}
 		fileID, _ := strconv.ParseUint(c.Query("fileId", "0"), 10, 64)
 		var res models.ExamPaperResource
 		if err := db.Where("id = ? AND exam_paper_id = ?", fileID, info.Paper.ID).First(&res).Error; err != nil {
 			return c.Status(404).JSON(fiber.Map{"error": "File không tồn tại"})
 		}
+		if inline && examFileCanViewInline(res.FileName) {
+			return sendExamFileInline(c, res.FilePath, res.FileName)
+		}
 		return c.Download(res.FilePath, res.FileName)
 	}
 }
 
+func examFileCanViewInline(fileName string) bool {
+	switch strings.ToLower(filepath.Ext(fileName)) {
+	case ".pdf", ".png", ".jpg", ".jpeg", ".gif", ".webp", ".txt":
+		return true
+	default:
+		return false
+	}
+}
+
+func examViewMimeType(fileName string) string {
+	switch strings.ToLower(filepath.Ext(fileName)) {
+	case ".pdf":
+		return "application/pdf"
+	case ".png":
+		return "image/png"
+	case ".jpg", ".jpeg":
+		return "image/jpeg"
+	case ".gif":
+		return "image/gif"
+	case ".webp":
+		return "image/webp"
+	case ".txt":
+		return "text/plain; charset=utf-8"
+	default:
+		return "application/octet-stream"
+	}
+}
+
+func sendExamFileInline(c *fiber.Ctx, filePath, fileName string) error {
+	c.Set("Content-Type", examViewMimeType(fileName))
+	c.Set("Content-Disposition", fmt.Sprintf("inline; filename=%q", fileName))
+	return c.SendFile(filePath)
+}
+
 // POST /api/student/exam/submit — multipart zip
 func SubmitStudentExamHandler(db *gorm.DB) fiber.Handler {
 	return func(c *fiber.Ctx) error {