137 lines
3.8 KiB
Go
137 lines
3.8 KiB
Go
package controllers
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import (
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"fmt"
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"net/http"
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"net/url"
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"os"
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"path"
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"path/filepath"
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"strings"
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"text/template"
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log "github.com/sirupsen/logrus"
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"github.com/owncast/owncast/config"
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"github.com/owncast/owncast/core"
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"github.com/owncast/owncast/core/data"
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"github.com/owncast/owncast/models"
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"github.com/owncast/owncast/router/middleware"
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"github.com/owncast/owncast/utils"
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)
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// MetadataPage represents a server-rendered web page for bots and web scrapers.
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type MetadataPage struct {
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RequestedURL string
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Image string
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Thumbnail string
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TagsString string
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Summary string
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Name string
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Tags []string
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SocialHandles []models.SocialHandle
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}
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// IndexHandler handles the default index route.
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func IndexHandler(w http.ResponseWriter, r *http.Request) {
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middleware.EnableCors(&w)
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isIndexRequest := r.URL.Path == "/" || filepath.Base(r.URL.Path) == "index.html" || filepath.Base(r.URL.Path) == ""
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// For search engine bots and social scrapers return a special
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// server-rendered page.
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if utils.IsUserAgentABot(r.UserAgent()) && isIndexRequest {
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handleScraperMetadataPage(w, r)
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return
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}
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if utils.IsUserAgentAPlayer(r.UserAgent()) && isIndexRequest {
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http.Redirect(w, r, "/hls/stream.m3u8", http.StatusTemporaryRedirect)
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return
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}
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// If the ETags match then return a StatusNotModified
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if responseCode := middleware.ProcessEtags(w, r); responseCode != 0 {
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w.WriteHeader(responseCode)
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return
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}
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// If this is a directory listing request then return a 404
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info, err := os.Stat(path.Join(config.WebRoot, r.URL.Path))
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if err != nil || (info.IsDir() && !isIndexRequest) {
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w.WriteHeader(http.StatusNotFound)
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return
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}
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if path.Ext(r.URL.Path) == ".m3u8" {
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middleware.DisableCache(w)
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// Use this as an opportunity to mark this viewer as active.
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id := utils.GenerateClientIDFromRequest(r)
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core.SetViewerIdActive(id)
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}
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// Set a cache control max-age header
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middleware.SetCachingHeaders(w, r)
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// Set our global HTTP headers
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middleware.SetHeaders(w)
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http.ServeFile(w, r, path.Join(config.WebRoot, r.URL.Path))
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}
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// Return a basic HTML page with server-rendered metadata from the config file
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// to give to Opengraph clients and web scrapers (bots, web crawlers, etc).
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func handleScraperMetadataPage(w http.ResponseWriter, r *http.Request) {
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tmpl := template.Must(template.ParseFiles(path.Join("static", "metadata.html")))
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scheme := "http"
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if siteUrl := data.GetServerURL(); siteUrl != "" {
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if parsed, err := url.Parse(siteUrl); err == nil && parsed.Scheme != "" {
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scheme = parsed.Scheme
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}
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}
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fullURL, err := url.Parse(fmt.Sprintf("%s://%s%s", scheme, r.Host, r.URL.Path))
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if err != nil {
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log.Panicln(err)
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}
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imageURL, err := url.Parse(fmt.Sprintf("%s://%s%s", scheme, r.Host, "/logo/external"))
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if err != nil {
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log.Panicln(err)
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}
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status := core.GetStatus()
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// If the thumbnail does not exist or we're offline then just use the logo image
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var thumbnailURL string
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if status.Online && utils.DoesFileExists(filepath.Join(config.WebRoot, "thumbnail.jpg")) {
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thumbnail, err := url.Parse(fmt.Sprintf("%s://%s%s", scheme, r.Host, "/thumbnail.jpg"))
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if err != nil {
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log.Errorln(err)
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thumbnailURL = imageURL.String()
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} else {
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thumbnailURL = thumbnail.String()
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}
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} else {
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thumbnailURL = imageURL.String()
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}
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tagsString := strings.Join(data.GetServerMetadataTags(), ",")
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metadata := MetadataPage{
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Name: data.GetServerName(),
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RequestedURL: fullURL.String(),
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Image: imageURL.String(),
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Summary: data.GetServerSummary(),
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Thumbnail: thumbnailURL,
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TagsString: tagsString,
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Tags: data.GetServerMetadataTags(),
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SocialHandles: data.GetSocialHandles(),
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}
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w.Header().Set("Content-Type", "text/html")
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if err := tmpl.Execute(w, metadata); err != nil {
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log.Panicln(err)
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}
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}
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