func Subscribe(opmlPath, page string) error {
feed, err := findFeed(page)
if err != nil {
return err
}
outline, err := opml.Load(opmlPath)
if err != nil {
return err
}
newfeed, err := getData(feed)
if err != nil {
return err
}
outline.Body.Outline = append(outline.Body.Outline, newfeed)
file, err := os.OpenFile(opmlPath, os.O_WRONLY|os.O_TRUNC, 0)
if err != nil {
return err
}
defer file.Close()
return outline.WriteTo(file)
}
func (h *listHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
outline, err := opml.Load(h.opmlPath)
if err != nil {
log.Println("list", err)
w.WriteHeader(500)
return
}
var list feeds
for _, line := range outline.Body.Outline {
if line.Type == "rss" {
f := feed{
FeedUrl: line.XmlUrl,
WebsiteUrl: line.HtmlUrl,
FeedTitle: line.Title,
FeedDescription: line.Description,
}
if f.FeedTitle == "" {
f.FeedTitle = f.FeedUrl
}
list = append(list, f)
}
}
sort.Sort(list)
w.Header().Add("Content-Type", "text/html")
views.Index.Execute(w, struct {
Url string
PathPrefix string
Feeds []feed
}{h.url, h.pathPrefix, list})
}
func main() {
flag.Parse()
if *help || flag.NArg() == 0 {
printHelp()
return
}
var wg sync.WaitGroup
waitFor := func(name string, f func() error) {
log.Println(name, "waiting to close")
wg.Add(1)
if err := f(); err != nil {
log.Println("waitFor:", err)
}
wg.Done()
log.Println(name, "closed")
}
opmlPath := flag.Arg(0)
duration, err := time.ParseDuration(*cutOff)
if err != nil {
log.Println(err)
return
}
cacheTimeout, err := time.ParseDuration(*refresh)
if err != nil {
log.Println(err)
return
}
store, err := loadDatastore()
if err != nil {
log.Println(err)
return
}
defer waitFor("datastore", store.Close)
outline, err := opml.Load(opmlPath)
if err != nil {
log.Println(err)
return
}
feeds := river.New(store, river.Options{
Mapping: river.DefaultMapping,
CutOff: duration,
Refresh: cacheTimeout,
LogLength: 500,
})
defer waitFor("feeds", feeds.Close)
subs := subscriptions.FromOpml(outline)
for _, sub := range subs.List() {
feeds.Add(sub.Uri)
}
watcher, err := watchFile(opmlPath, func() {
log.Printf("reading %s\n", opmlPath)
outline, err := opml.Load(opmlPath)
if err != nil {
log.Printf("could not read %s: %s\n", opmlPath, err)
return
}
added, removed := subscriptions.Diff(subs, subscriptions.FromOpml(outline))
for _, uri := range added {
feeds.Add(uri)
subs.Add(uri)
}
for _, uri := range removed {
feeds.Remove(uri)
subs.Remove(uri)
}
})
if err != nil {
log.Printf("could not start watching %s: %v\n", opmlPath, err)
}
defer waitFor("watcher", watcher.Close)
http.Handle("/river/", http.StripPrefix("/river", newRiverHandler(feeds)))
serve.Serve(*port, *socket, http.DefaultServeMux)
wg.Wait()
}
