e409f967a9
- admin-server 新增 GET/POST /api/wallpaper： multipart 上传（png/jpg/webp/gif/svg，上限 8MB）或 JSON 直接给 URL， 服务端把一段带标记的 CSS 写入 appConfig.customCss（标记块可反复替换， 不碰主题其余部分），并记录 appConfig.wallpaper / wallpaperDim。 - 上传的图片落在 data 卷 wallpapers/，nginx 以 /wallpapers/ 提供 （长缓存，文件名带时间戳）。 - 遮罩：壁纸上面铺一层可调强度的白色 linear-gradient，默认 0.45， 否则玻璃卡片上的文字在照片上会读不清。 - 安全：URL 校验只允许 / 或 http(s):// 开头且不含引号/括号/换行， 避免注入到 CSS；类型判定走正文特征而非文件名。 - admin UI 增加「外观」区块：上传/填 URL/遮罩滑块/应用/移除 + 预览。 实测：上传 → /wallpapers/wall-*.png，web 200 image/png， body background-image 为遮罩+图片，移除后恢复默认渐变。
641 lines
17 KiB
Go
641 lines
17 KiB
Go
package main
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"log"
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"net/http"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"sync"
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"time"
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"gopkg.in/yaml.v3"
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)
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var (
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confFile = envOr("DASHY_CONF", "/app/data/conf.yml")
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adminToken = os.Getenv("NAVI_ADMIN_TOKEN")
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// requireTokenForWrite：是否需要额外的 Bearer token。
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//
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// /admin/ 在生产里整体位于外层统一认证反向代理（portal-nginx 的 auth_request）
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// 之后，再叠一层 token 是重复的，而且会让 admin UI 的写操作静默 401。
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// 所以默认**不校验**；只有当你把容器端口直接暴露给不受信的网段、
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// 而没有外层认证时才设 NAVI_ADMIN_REQUIRE_TOKEN=1。
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requireTokenForWrite = isTruthy(os.Getenv("NAVI_ADMIN_REQUIRE_TOKEN"))
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// 本地上传的图标目录（Dashy 通过 /item-icons/ 读取）
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iconDir = envOr("NAVI_ICON_DIR", filepath.Join(filepath.Dir(confFile), "item-icons"))
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// 壁纸目录（nginx 通过 /wallpapers/ 提供）
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wallpaperDir = envOr("NAVI_WALLPAPER_DIR", filepath.Join(filepath.Dir(confFile), "wallpapers"))
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mu sync.Mutex
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)
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// ── 壁纸 ──
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//
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// Dashy 没有原生壁纸配置，所以由服务端把一段带标记的 CSS 写进
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// appConfig.customCss。标记块可反复替换，不碰主题的其余部分。
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const (
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wallpaperBegin = "/* ==NAVI-WALLPAPER-BEGIN== */"
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wallpaperEnd = "/* ==NAVI-WALLPAPER-END== */"
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wallpaperMaxBytes = 8 << 20
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)
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// applyWallpaperBlock 把壁纸规则替换/插入 customCss；url 为空则只移除。
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// dim 是铺在图片上的白色遮罩强度，保证玻璃卡片上的文字仍然可读。
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func applyWallpaperBlock(css, url string, dim float64) string {
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for {
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i := strings.Index(css, wallpaperBegin)
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if i < 0 {
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break
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}
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rest := css[i:]
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j := strings.Index(rest, wallpaperEnd)
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if j < 0 {
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css = css[:i]
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break
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}
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css = css[:i] + rest[j+len(wallpaperEnd):]
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}
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css = strings.TrimRight(css, " \t\r\n")
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if url == "" {
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return css + "\n"
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}
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if dim < 0 {
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dim = 0
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}
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if dim > 0.9 {
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dim = 0.9
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}
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scrim := strconv.FormatFloat(dim, 'f', 2, 64)
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return css + "\n\n" + wallpaperBegin + "\n" +
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"html[data-theme] body{\n" +
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" background-image:\n" +
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" linear-gradient(rgba(255,255,255," + scrim + "), rgba(255,255,255," + scrim + ")),\n" +
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" url(\"" + url + "\") !important;\n" +
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" background-size: cover !important;\n" +
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" background-position: center center !important;\n" +
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" background-attachment: fixed !important;\n" +
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" background-repeat: no-repeat !important;\n" +
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"}\n" + wallpaperEnd + "\n"
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}
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// safeCSSURL 避免把引号/括号/换行注入到 CSS 里。
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func safeCSSURL(u string) bool {
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if u == "" {
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return true
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}
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if len(u) > 512 {
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return false
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}
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if strings.ContainsAny(u, "\"'()\\\n\r\t") {
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return false
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}
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return strings.HasPrefix(u, "/") || strings.HasPrefix(u, "http://") || strings.HasPrefix(u, "https://")
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}
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func readWallpaper(cfg *Config) map[string]any {
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url, _ := cfg.AppConfig["wallpaper"].(string)
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dim := 0.45
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switch v := cfg.AppConfig["wallpaperDim"].(type) {
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case float64:
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dim = v
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case int:
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dim = float64(v)
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}
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return map[string]any{"url": url, "dim": dim}
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}
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// handleWallpaper 支持：
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//
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// GET 查看当前壁纸
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// POST multipart 上传图片（字段 file）
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// POST json 直接设置 URL 或关闭（{"url":"","dim":0.45}）
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func handleWallpaper(w http.ResponseWriter, r *http.Request) {
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mu.Lock()
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defer mu.Unlock()
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cfg, err := loadConfig()
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if err != nil {
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jsonErr(w, 500, err.Error())
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return
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}
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if cfg.AppConfig == nil {
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cfg.AppConfig = map[string]any{}
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}
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switch r.Method {
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case http.MethodGet:
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jsonResp(w, readWallpaper(cfg))
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return
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case http.MethodPost:
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default:
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jsonErr(w, 405, "method not allowed")
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return
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}
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if !requireAdminToken(w, r) {
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return
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}
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url := ""
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dim := 0.45
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if v, ok := cfg.AppConfig["wallpaperDim"].(float64); ok {
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dim = v
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}
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ct := r.Header.Get("Content-Type")
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if strings.HasPrefix(ct, "multipart/form-data") {
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r.Body = http.MaxBytesReader(w, r.Body, wallpaperMaxBytes+1<<20)
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if err := r.ParseMultipartForm(4 << 20); err != nil {
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jsonErr(w, 400, "解析上传失败: "+err.Error())
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return
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}
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file, _, err := r.FormFile("file")
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if err != nil {
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jsonErr(w, 400, "缺少 file 字段")
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return
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}
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defer file.Close()
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data, err := io.ReadAll(io.LimitReader(file, wallpaperMaxBytes+1))
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if err != nil {
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jsonErr(w, 400, err.Error())
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return
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}
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if len(data) > wallpaperMaxBytes {
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jsonErr(w, 400, "壁纸过大（上限 8MB）")
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return
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}
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ext, ok := detectWallpaperExt(data)
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if !ok {
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jsonErr(w, 400, "壁纸只支持 png / jpg / webp / gif / svg")
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return
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}
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name := fmt.Sprintf("wall-%d%s", time.Now().Unix(), ext)
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if err := os.MkdirAll(wallpaperDir, 0755); err != nil {
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jsonErr(w, 500, err.Error())
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return
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}
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if err := os.WriteFile(filepath.Join(wallpaperDir, name), data, 0644); err != nil {
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jsonErr(w, 500, err.Error())
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return
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}
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url = "/wallpapers/" + name
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} else {
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var body struct {
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URL *string `json:"url"`
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Dim *float64 `json:"dim"`
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}
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if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
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jsonErr(w, 400, err.Error())
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return
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}
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if body.URL != nil {
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url = strings.TrimSpace(*body.URL)
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} else {
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url, _ = cfg.AppConfig["wallpaper"].(string)
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}
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if body.Dim != nil {
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dim = *body.Dim
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}
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}
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if !safeCSSURL(url) {
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jsonErr(w, 400, "壁纸地址不合法（需以 / 或 http(s):// 开头，且不含引号括号）")
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return
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}
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css, _ := cfg.AppConfig["customCss"].(string)
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cfg.AppConfig["customCss"] = applyWallpaperBlock(css, url, dim)
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cfg.AppConfig["wallpaper"] = url
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cfg.AppConfig["wallpaperDim"] = dim
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if err := saveConfig(cfg); err != nil {
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jsonErr(w, 500, err.Error())
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return
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}
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jsonResp(w, map[string]any{"url": url, "dim": dim})
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}
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// detectWallpaperExt 以正文特征判定图片类型。
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func detectWallpaperExt(data []byte) (string, bool) {
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switch {
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case bytes.HasPrefix(data, []byte("\x89PNG\r\n\x1a\n")):
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return ".png", true
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case bytes.HasPrefix(data, []byte("\xff\xd8\xff")):
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return ".jpg", true
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case bytes.HasPrefix(data, []byte("GIF87a")), bytes.HasPrefix(data, []byte("GIF89a")):
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return ".gif", true
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case len(data) >= 12 && bytes.HasPrefix(data, []byte("RIFF")) && bytes.Equal(data[8:12], []byte("WEBP")):
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return ".webp", true
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}
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trim := bytes.TrimSpace(bytes.TrimPrefix(data, []byte{0xEF, 0xBB, 0xBF}))
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low := bytes.ToLower(trim)
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if len(low) > 512 {
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low = low[:512]
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}
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if bytes.HasPrefix(low, []byte("<svg")) ||
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(bytes.HasPrefix(low, []byte("<?xml")) && bytes.Contains(low, []byte("<svg"))) {
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return ".svg", true
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}
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return "", false
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}
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func isTruthy(v string) bool {
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switch strings.ToLower(strings.TrimSpace(v)) {
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case "1", "true", "yes", "on":
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return true
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}
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return false
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}
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// requireAdminToken 仅在显式开启时才校验。
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func requireAdminToken(w http.ResponseWriter, r *http.Request) bool {
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if !requireTokenForWrite {
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return true
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}
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if adminToken == "" {
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return true // 开了开关却没配 token，等同于不校验
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}
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return requireToken(w, r, adminToken)
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}
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func requireToken(w http.ResponseWriter, r *http.Request, expected string) bool {
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if expected == "" {
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return true // 未配置 token 则不校验
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}
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auth := r.Header.Get("Authorization")
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if strings.HasPrefix(auth, "Bearer ") && strings.TrimPrefix(auth, "Bearer ") == expected {
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return true
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}
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jsonErr(w, http.StatusUnauthorized, "invalid or missing token")
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return false
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}
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type Config struct {
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AppConfig map[string]any `yaml:"appConfig" json:"appConfig"`
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PageInfo map[string]any `yaml:"pageInfo" json:"pageInfo"`
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Sections []Section `yaml:"sections" json:"sections"`
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// Extra 用 yaml 的 inline 机制原样保留本程序不认识的顶层键（如 layout、
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// iconSize、pages 等）。admin 保存 conf.yml 时不能把没碰过的配置丢掉。
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Extra map[string]any `yaml:",inline" json:"-"`
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}
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type Section struct {
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Name string `yaml:"name" json:"name"`
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Icon string `yaml:"icon,omitempty" json:"icon,omitempty"`
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Collapsed *bool `yaml:"collapsed,omitempty" json:"collapsed,omitempty"`
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Items []NavItem `yaml:"items" json:"items"`
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Extra map[string]any `yaml:",inline" json:"-"`
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}
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type NavItem struct {
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Title string `yaml:"title" json:"title"`
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Description string `yaml:"description,omitempty" json:"description,omitempty"`
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Icon string `yaml:"icon,omitempty" json:"icon,omitempty"`
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URL string `yaml:"url" json:"url"`
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StatusCheck *bool `yaml:"statusCheck,omitempty" json:"statusCheck,omitempty"`
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// Dashy 的 item 还可能有 target / hotkey / color 等字段，一并保留
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Extra map[string]any `yaml:",inline" json:"-"`
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}
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func envOr(k, def string) string {
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if v := os.Getenv(k); v != "" {
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return v
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}
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return def
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}
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func loadConfig() (*Config, error) {
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data, err := os.ReadFile(confFile)
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if err != nil {
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return nil, err
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}
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var cfg Config
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if err := yaml.Unmarshal(data, &cfg); err != nil {
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return nil, err
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}
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return &cfg, nil
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}
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func saveConfig(cfg *Config) error {
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data, err := yaml.Marshal(cfg)
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if err != nil {
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return err
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}
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tmp := confFile + ".tmp"
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if err := os.WriteFile(tmp, data, 0644); err != nil {
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return err
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}
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return os.Rename(tmp, confFile)
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}
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func cors(next http.HandlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Access-Control-Allow-Origin", "*")
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w.Header().Set("Access-Control-Allow-Methods", "GET, POST, DELETE, OPTIONS")
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w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
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if r.Method == http.MethodOptions {
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w.WriteHeader(204)
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return
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}
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next(w, r)
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}
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}
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func jsonResp(w http.ResponseWriter, v any) {
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w.Header().Set("Content-Type", "application/json")
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json.NewEncoder(w).Encode(v)
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}
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func jsonErr(w http.ResponseWriter, status int, msg string) {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(status)
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json.NewEncoder(w).Encode(map[string]string{"error": msg})
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}
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func handleSections(w http.ResponseWriter, r *http.Request) {
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mu.Lock()
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defer mu.Unlock()
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cfg, err := loadConfig()
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if err != nil {
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jsonErr(w, 500, err.Error())
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return
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}
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jsonResp(w, cfg.Sections)
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}
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func handleAddItem(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
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jsonErr(w, 405, "method not allowed")
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return
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}
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if !requireAdminToken(w, r) {
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return
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}
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mu.Lock()
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defer mu.Unlock()
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var req struct {
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SectionIndex int `json:"sectionIndex"`
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Item NavItem `json:"item"`
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}
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if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
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jsonErr(w, 400, err.Error())
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return
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}
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if req.Item.Title == "" || req.Item.URL == "" {
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jsonErr(w, 400, "title and url required")
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return
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}
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// Block javascript: URLs
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if strings.HasPrefix(strings.ToLower(req.Item.URL), "javascript:") {
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jsonErr(w, 400, "javascript: URLs not allowed")
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return
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}
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cfg, err := loadConfig()
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if err != nil {
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jsonErr(w, 500, err.Error())
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return
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}
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if req.SectionIndex < 0 || req.SectionIndex >= len(cfg.Sections) {
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jsonErr(w, 400, "invalid section index")
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return
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}
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cfg.Sections[req.SectionIndex].Items = append(cfg.Sections[req.SectionIndex].Items, req.Item)
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if err := saveConfig(cfg); err != nil {
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jsonErr(w, 500, err.Error())
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return
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}
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jsonResp(w, map[string]string{"status": "ok"})
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}
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func handleDeleteItem(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodDelete {
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jsonErr(w, 405, "method not allowed")
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return
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}
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if !requireAdminToken(w, r) {
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return
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}
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mu.Lock()
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defer mu.Unlock()
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var req struct {
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SectionIndex int `json:"sectionIndex"`
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ItemIndex int `json:"itemIndex"`
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}
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if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
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jsonErr(w, 400, err.Error())
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return
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}
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|
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cfg, err := loadConfig()
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if err != nil {
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jsonErr(w, 500, err.Error())
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return
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}
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if req.SectionIndex < 0 || req.SectionIndex >= len(cfg.Sections) {
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jsonErr(w, 400, "invalid section index")
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return
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}
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sec := &cfg.Sections[req.SectionIndex]
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if req.ItemIndex < 0 || req.ItemIndex >= len(sec.Items) {
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jsonErr(w, 400, "invalid item index")
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return
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}
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sec.Items = append(sec.Items[:req.ItemIndex], sec.Items[req.ItemIndex+1:]...)
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if err := saveConfig(cfg); err != nil {
|
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jsonErr(w, 500, err.Error())
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return
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}
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jsonResp(w, map[string]string{"status": "ok"})
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}
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// ── 站点信息：标题 / 副标题 / 顶部导航 / 页脚 ──
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// 这些东西原先只能在 conf.yml 里手改，现在可在 /admin/ 编辑。
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func handlePageInfo(w http.ResponseWriter, r *http.Request) {
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mu.Lock()
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defer mu.Unlock()
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|
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cfg, err := loadConfig()
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if err != nil {
|
||
jsonErr(w, 500, err.Error())
|
||
return
|
||
}
|
||
if cfg.PageInfo == nil {
|
||
cfg.PageInfo = map[string]any{}
|
||
}
|
||
|
||
switch r.Method {
|
||
case http.MethodGet:
|
||
jsonResp(w, cfg.PageInfo)
|
||
case http.MethodPost:
|
||
if !requireAdminToken(w, r) {
|
||
return
|
||
}
|
||
var body struct {
|
||
Title *string `json:"title"`
|
||
Description *string `json:"description"`
|
||
Footer *string `json:"footer"`
|
||
NavLinks *[]map[string]any `json:"navLinks"`
|
||
}
|
||
if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
|
||
jsonErr(w, 400, err.Error())
|
||
return
|
||
}
|
||
if body.Title != nil {
|
||
cfg.PageInfo["title"] = *body.Title
|
||
}
|
||
if body.Description != nil {
|
||
cfg.PageInfo["description"] = *body.Description
|
||
}
|
||
if body.Footer != nil {
|
||
cfg.PageInfo["footer"] = *body.Footer
|
||
}
|
||
if body.NavLinks != nil {
|
||
cfg.PageInfo["navLinks"] = *body.NavLinks
|
||
}
|
||
if err := saveConfig(cfg); err != nil {
|
||
jsonErr(w, 500, err.Error())
|
||
return
|
||
}
|
||
jsonResp(w, cfg.PageInfo)
|
||
default:
|
||
jsonErr(w, 405, "method not allowed")
|
||
}
|
||
}
|
||
|
||
// ── 图标上传 ──
|
||
//
|
||
// 只接受 Dashy 能渲染的格式：其 isImage() 白名单是 [svg,png,jpg]。
|
||
// .ico 渲染不出来，由前端先用 canvas 转成 PNG 再上传。
|
||
const iconMaxBytes = 512 << 10
|
||
|
||
func handleIconUpload(w http.ResponseWriter, r *http.Request) {
|
||
if r.Method != http.MethodPost {
|
||
jsonErr(w, 405, "method not allowed")
|
||
return
|
||
}
|
||
if !requireAdminToken(w, r) {
|
||
return
|
||
}
|
||
r.Body = http.MaxBytesReader(w, r.Body, 4<<20)
|
||
if err := r.ParseMultipartForm(4 << 20); err != nil {
|
||
jsonErr(w, 400, "解析上传失败: "+err.Error())
|
||
return
|
||
}
|
||
file, hdr, err := r.FormFile("file")
|
||
if err != nil {
|
||
jsonErr(w, 400, "缺少 file 字段")
|
||
return
|
||
}
|
||
defer file.Close()
|
||
|
||
data, err := io.ReadAll(io.LimitReader(file, iconMaxBytes+1))
|
||
if err != nil {
|
||
jsonErr(w, 400, err.Error())
|
||
return
|
||
}
|
||
if len(data) > iconMaxBytes {
|
||
jsonErr(w, 400, "图标过大（上限 512KB）")
|
||
return
|
||
}
|
||
ext, ok := detectIconExt(data)
|
||
if !ok {
|
||
jsonErr(w, 400, "只支持 png / svg / jpg（.ico 请在页面上选择，会自动转成 png）")
|
||
return
|
||
}
|
||
name := safeIconName(r.FormValue("name"), hdr.Filename, ext)
|
||
if err := os.MkdirAll(iconDir, 0755); err != nil {
|
||
jsonErr(w, 500, err.Error())
|
||
return
|
||
}
|
||
if err := os.WriteFile(filepath.Join(iconDir, name), data, 0644); err != nil {
|
||
jsonErr(w, 500, err.Error())
|
||
return
|
||
}
|
||
jsonResp(w, map[string]string{"icon": name})
|
||
}
|
||
|
||
// detectIconExt 以**正文特征**判定类型，不信任上传的文件名/Cotent-Type。
|
||
func detectIconExt(data []byte) (string, bool) {
|
||
switch {
|
||
case bytes.HasPrefix(data, []byte("\x89PNG\r\n\x1a\n")):
|
||
return ".png", true
|
||
case bytes.HasPrefix(data, []byte("\xff\xd8\xff")):
|
||
return ".jpg", true
|
||
}
|
||
trim := bytes.TrimSpace(bytes.TrimPrefix(data, []byte{0xEF, 0xBB, 0xBF}))
|
||
low := bytes.ToLower(trim)
|
||
if len(low) > 512 {
|
||
low = low[:512]
|
||
}
|
||
if bytes.HasPrefix(low, []byte("<svg")) ||
|
||
(bytes.HasPrefix(low, []byte("<?xml")) && bytes.Contains(low, []byte("<svg"))) {
|
||
return ".svg", true
|
||
}
|
||
return "", false
|
||
}
|
||
|
||
// safeIconName 用「提示名 + 时间戳」生成安全文件名：时间戳兼做缓存失效，
|
||
// 避免换图后 Dashy 或浏览器还沿用旧图。
|
||
func safeIconName(hint, filename, ext string) string {
|
||
base := strings.TrimSpace(hint)
|
||
if base == "" {
|
||
base = filename
|
||
}
|
||
base = strings.ToLower(strings.TrimSuffix(base, filepath.Ext(base)))
|
||
var b strings.Builder
|
||
for _, r := range base {
|
||
switch {
|
||
case r >= 'a' && r <= 'z', r >= '0' && r <= '9', r == '-', r == '_':
|
||
b.WriteRune(r)
|
||
case r == '.' || r == ' ':
|
||
b.WriteByte('-')
|
||
}
|
||
}
|
||
s := b.String()
|
||
if s == "" {
|
||
s = "icon"
|
||
}
|
||
if len(s) > 48 {
|
||
s = s[:48]
|
||
}
|
||
return fmt.Sprintf("%s-%d%s", s, time.Now().Unix(), ext)
|
||
}
|
||
|
||
func main() {
|
||
// Ensure conf file exists
|
||
if _, err := os.Stat(confFile); os.IsNotExist(err) {
|
||
defaultConf := envOr("NAVI_DEFAULT_CONFIG", "/app/defaults/conf.yml")
|
||
if data, err := os.ReadFile(defaultConf); err == nil {
|
||
os.MkdirAll(filepath.Dir(confFile), 0755)
|
||
os.WriteFile(confFile, data, 0644)
|
||
}
|
||
}
|
||
|
||
// Serve admin UI static files (nginx strips /admin/ prefix)
|
||
http.Handle("/", http.FileServer(http.Dir("/app/admin")))
|
||
|
||
http.HandleFunc("/api/sections", cors(handleSections))
|
||
http.HandleFunc("/api/item", cors(handleAddItem))
|
||
http.HandleFunc("/api/item/delete", cors(handleDeleteItem))
|
||
http.HandleFunc("/api/pageinfo", cors(handlePageInfo))
|
||
http.HandleFunc("/api/icon", cors(handleIconUpload))
|
||
http.HandleFunc("/api/wallpaper", cors(handleWallpaper))
|
||
http.HandleFunc("/api/reload", cors(func(w http.ResponseWriter, r *http.Request) {
|
||
jsonResp(w, map[string]string{"status": "saved"})
|
||
}))
|
||
http.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
|
||
jsonResp(w, map[string]string{"status": "ok"})
|
||
})
|
||
|
||
log.Println("admin-server listening on :3005")
|
||
log.Fatal(http.ListenAndServe(":3005", nil))
|
||
}
|