压缩历史至 95081aff

internal/apps/upload/file_server.go

@@ -0,0 +1,75 @@
+/*
+Copyright 2025 linux.do
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package upload
+
+import (
+	"errors"
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"github.com/linux-do/credit/internal/db"
+	"github.com/linux-do/credit/internal/model"
+	"github.com/linux-do/credit/internal/storage"
+	"gorm.io/gorm"
+)
+
+// ServeFileByID serves an uploaded file by its ID
+// @Tags upload
+// @Produce octet-stream
+// @Param id path string true "Upload ID"
+// @Success 200
+// @Router /f/{id} [get]
+func ServeFileByID(c *gin.Context) {
+	idStr := c.Param("id")
+	uploadID, err := strconv.ParseUint(idStr, 10, 64)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid upload ID"})
+		return
+	}
+
+	var upload model.Upload
+	if err := db.DB(c.Request.Context()).
+		Where("id = ? AND status IN (?, ?)", uploadID, model.UploadStatusPending, model.UploadStatusUsed).
+		First(&upload).Error; err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			c.AbortWithStatus(http.StatusNotFound)
+			return
+		}
+		c.AbortWithStatus(http.StatusInternalServerError)
+		return
+	}
+
+	// Retrieve file from S3 (via CDN if configured)
+	obj, err := storage.GetObjectViaCache(c.Request.Context(), upload.FilePath)
+	if err != nil {
+		c.AbortWithStatus(http.StatusNotFound)
+		return
+	}
+
+	// Cachefile
+	if obj.CachePath != "" {
+		c.File(obj.CachePath)
+		return
+	}
+
+	// Stream from CDN/S3
+	defer obj.Body.Close()
+
+	// Respond with the file content
+	c.DataFromReader(http.StatusOK, obj.ContentLength, obj.ContentType, obj.Body, nil)
+}