Daniel Legt
3b278642dc
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Implements dynamic Open Graph (OG) metadata and image generation for
single-file shared boxes to improve social media previews.
Changes include:
- Added a new route `/d/{boxID}/f/{fileID}/og-image.jpg` for file-specific OG images.
- Updated `DownloadPage` to dynamically set the page title, description, and OG image properties when a box contains only one file.
- Restricted raw media inline serving for social bots to images and videos.
- Added helper functions to format file share descriptions and determine appropriate social image URLs and types.
- Integrated basic font rendering to support dynamic OG image generation.
97 lines
2.1 KiB
Go
97 lines
2.1 KiB
Go
package web
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import (
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"html/template"
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"net/http"
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"path/filepath"
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"time"
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)
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// RobotsNone is used for private, protected, expired, or temporary pages.
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const RobotsNone = "noindex,nofollow,noarchive"
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type Renderer struct {
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templates map[string]*template.Template
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appName string
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appVersion string
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baseURL string
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}
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type PageData struct {
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AppName string
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AppVersion string
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BaseURL string
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CanonicalURL string
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Robots string
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OGType string
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Title string
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Description string
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ImageURL string
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ImageAlt string
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ImageType string
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MediaURL string
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MediaType string
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CurrentYear int
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CurrentUser any
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CSRFToken string
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Data any
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}
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func NewRenderer(templateDir, appName, appVersion, baseURL string) (*Renderer, error) {
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layouts, err := filepath.Glob(filepath.Join(templateDir, "layouts", "*.html"))
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if err != nil {
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return nil, err
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}
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partials, err := filepath.Glob(filepath.Join(templateDir, "partials", "*.html"))
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if err != nil {
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return nil, err
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}
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pages, err := filepath.Glob(filepath.Join(templateDir, "pages", "*.html"))
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if err != nil {
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return nil, err
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}
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templates := make(map[string]*template.Template, len(pages))
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for _, page := range pages {
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files := append([]string{}, layouts...)
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files = append(files, partials...)
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files = append(files, page)
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parsed, err := template.ParseFiles(files...)
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if err != nil {
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return nil, err
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}
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templates[filepath.Base(page)] = parsed
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}
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return &Renderer{
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templates: templates,
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appName: appName,
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appVersion: appVersion,
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baseURL: baseURL,
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}, nil
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}
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func (r *Renderer) Render(w http.ResponseWriter, status int, page string, data PageData) {
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data.AppName = r.appName
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data.AppVersion = r.appVersion
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data.BaseURL = r.baseURL
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data.CurrentYear = time.Now().Year()
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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w.WriteHeader(status)
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tmpl, ok := r.templates[page]
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if !ok {
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http.Error(w, "template not found", http.StatusInternalServerError)
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return
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}
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if err := tmpl.ExecuteTemplate(w, page, data); err != nil {
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http.Error(w, "template render error", http.StatusInternalServerError)
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}
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}
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