33 lines
915 B
Go
33 lines
915 B
Go
package handler
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import (
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"net/http"
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"os"
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"path/filepath"
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"strings"
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"github.com/gin-gonic/gin"
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"git.iioio.com/freefire/jiang13-forum/service"
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)
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// ServeImageThumb 帖子图片缩略图（按需生成并缓存）
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// GET /media/thumb/posts/xxx.webp → 最长边 1280 的 WebP 预览
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func (h *Handlers) ServeImageThumb(c *gin.Context) {
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rel := strings.TrimPrefix(c.Param("filepath"), "/")
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uploadsRoot := filepath.Join(h.Cfg.DataDir, "uploads")
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thumbPath, err := service.EnsureUploadThumb(uploadsRoot, rel)
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if err != nil {
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// 生成失败时回退原图，避免正文裂图
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orig := filepath.Join(uploadsRoot, filepath.FromSlash(rel))
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if st, e := os.Stat(orig); e == nil && !st.IsDir() {
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c.Header("Cache-Control", "public, max-age=3600")
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c.File(orig)
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return
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}
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c.Status(http.StatusNotFound)
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return
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}
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c.Header("Cache-Control", "public, max-age=604800, immutable")
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c.File(thumbPath)
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}
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