| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "net/http" |
| 5 | "slices" |
| 6 | "strings" |
| 7 | ) |
| 8 | |
| 9 | var commonTags = []string{"og:title", "og:description", "og:image", "og:url", "og:type"} |
| 10 | |
| 11 | func (a *App) indexHandler(w http.ResponseWriter, r *http.Request) { |
| 12 | a.renderPage(w, "index.html", nil) |
| 13 | } |
| 14 | |
| 15 | func (a *App) checkHandler(w http.ResponseWriter, r *http.Request) { |
| 16 | if err := r.ParseForm(); err != nil { |
| 17 | a.renderPage(w, "results.html", resultsData{Error: "Bad request"}) |
| 18 | return |
| 19 | } |
| 20 | u := strings.TrimSpace(r.FormValue("url")) |
| 21 | if u == "" { |
| 22 | a.renderPage(w, "results.html", resultsData{Error: "Please enter a URL"}) |
| 23 | return |
| 24 | } |
| 25 | if !strings.HasPrefix(u, "http://") && !strings.HasPrefix(u, "https://") { |
| 26 | u = "https://" + u |
| 27 | } |
| 28 | |
| 29 | res, err := fetchOGData(r.Context(), u) |
| 30 | if err != nil { |
| 31 | a.renderPage(w, "results.html", resultsData{URL: u, Error: err.Error()}) |
| 32 | return |
| 33 | } |
| 34 | |
| 35 | data := resultsData{URL: u, OGImage: res.OGTags["og:image"], Favicon: res.Favicon} |
| 36 | for _, tag := range commonTags { |
| 37 | if v, ok := res.OGTags[tag]; ok { |
| 38 | data.FoundTags = append(data.FoundTags, tagKV{Key: tag, Value: v}) |
| 39 | } else { |
| 40 | data.MissingTags = append(data.MissingTags, tag) |
| 41 | } |
| 42 | } |
| 43 | for _, key := range res.OGOrder { |
| 44 | if slices.Contains(commonTags, key) { |
| 45 | continue |
| 46 | } |
| 47 | data.FoundTags = append(data.FoundTags, tagKV{Key: key, Value: res.OGTags[key]}) |
| 48 | } |
| 49 | data.LinkTags = res.LinkTags |
| 50 | a.renderPage(w, "results.html", data) |
| 51 | } |