owncast/controllers/index.go
2021-07-27 15:33:57 -07:00

127 lines
3.5 KiB
Go

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