Example #1
0
func ListFeeds(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	cu := user.Current(c)
	gn := goon.FromContext(c)
	u := &User{Id: cu.ID}
	ud := &UserData{Id: "data", Parent: gn.Key(u)}
	if err := gn.GetMulti([]interface{}{u, ud}); err != nil && !goon.NotFound(err, 1) {
		serveError(w, err)
		return
	}
	l := &Log{
		Parent: ud.Parent,
		Id:     time.Now().UnixNano(),
		Text:   "list feeds",
	}
	l.Text += fmt.Sprintf(", len opml %v", len(ud.Opml))
	putU := false
	putUD := false
	fixRead := false
	if time.Since(u.Read) > oldDuration {
		u.Read = time.Now().Add(-oldDuration)
		putU = true
		fixRead = true
		l.Text += ", u.Read"
	}
	trialRemaining := 0
	if STRIPE_KEY != "" && ud.Opml != nil && u.Account == AFree && u.Until.Before(time.Now()) {
		if u.Created.IsZero() {
			u.Created = time.Now()
			putU = true
		} else if time.Since(u.Created) > accountFreeDuration {
			b, _ := json.Marshal(struct {
				ErrorSubscription bool
			}{
				true,
			})
			w.Write(b)
			return
		}
		trialRemaining = int((accountFreeDuration-time.Since(u.Created))/time.Hour/24) + 1
	}
	read := make(Read)
	var uf Opml
	c.Step("unmarshal user data", func(c mpg.Context) {
		gob.NewDecoder(bytes.NewReader(ud.Read)).Decode(&read)
		json.Unmarshal(ud.Opml, &uf)
	})
	var feeds []*Feed
	opmlMap := make(map[string]*OpmlOutline)
	var merr error
	c.Step("fetch feeds", func(c mpg.Context) {
		gn := goon.FromContext(appengine.Timeout(c, time.Minute))
		for _, outline := range uf.Outline {
			if outline.XmlUrl == "" {
				for _, so := range outline.Outline {
					feeds = append(feeds, &Feed{Url: so.XmlUrl})
					opmlMap[so.XmlUrl] = so
				}
			} else {
				feeds = append(feeds, &Feed{Url: outline.XmlUrl})
				opmlMap[outline.XmlUrl] = outline
			}
		}
		merr = gn.GetMulti(feeds)
	})
	lock := sync.Mutex{}
	fl := make(map[string][]*Story)
	q := datastore.NewQuery(gn.Kind(&Story{})).
		Filter(IDX_COL+" >=", u.Read).
		KeysOnly().
		Order("-" + IDX_COL).
		Limit(250)
	updatedLinks := false
	now := time.Now()
	numStories := 0
	var stars []string

	c.Step(fmt.Sprintf("feed unreads: %v", u.Read), func(c mpg.Context) {
		queue := make(chan *Feed)
		tc := make(chan *taskqueue.Task)
		done := make(chan bool)
		wg := sync.WaitGroup{}
		feedProc := func() {
			for f := range queue {
				c.Step(f.Title, func(c mpg.Context) {
					defer wg.Done()
					var stories []*Story
					gn := goon.FromContext(appengine.Timeout(c, time.Minute))

					if !f.Date.Before(u.Read) {
						fk := gn.Key(f)
						sq := q.Ancestor(fk)
						keys, _ := gn.GetAll(sq, nil)
						stories = make([]*Story, len(keys))
						for j, key := range keys {
							stories[j] = &Story{
								Id:     key.StringID(),
								Parent: fk,
							}
						}
						gn.GetMulti(stories)
					}
					if f.Link != opmlMap[f.Url].HtmlUrl {
						l.Text += fmt.Sprintf(", link: %v -> %v", opmlMap[f.Url].HtmlUrl, f.Link)
						updatedLinks = true
						opmlMap[f.Url].HtmlUrl = f.Link
					}
					manualDone := false
					if time.Since(f.LastViewed) > time.Hour*24*2 {
						if !f.NextUpdate.Before(timeMax) {
							tc <- taskqueue.NewPOSTTask(routeUrl("update-feed-manual"), url.Values{
								"feed": {f.Url},
								"last": {"1"},
							})
							manualDone = true
						} else {
							tc <- taskqueue.NewPOSTTask(routeUrl("update-feed-last"), url.Values{
								"feed": {f.Url},
							})
						}
					}
					if !manualDone && now.Sub(f.NextUpdate) >= 0 {
						tc <- taskqueue.NewPOSTTask(routeUrl("update-feed-manual"), url.Values{
							"feed": {f.Url},
						})
					}
					lock.Lock()
					fl[f.Url] = stories
					numStories += len(stories)
					lock.Unlock()
				})
			}
		}
		go taskSender(c, "update-manual", tc, done)
		for i := 0; i < 20; i++ {
			go feedProc()
		}
		for i, f := range feeds {
			if goon.NotFound(merr, i) {
				continue
			}
			wg.Add(1)
			queue <- f
		}
		close(queue)
		c.Step("stars", func(c mpg.Context) {
			gn := goon.FromContext(c)
			q := datastore.NewQuery(gn.Kind(&UserStar{})).
				Ancestor(ud.Parent).
				KeysOnly().
				Filter("c >=", u.Read).
				Order("-c")
			keys, _ := gn.GetAll(q, nil)
			stars = make([]string, len(keys))
			for i, key := range keys {
				stars[i] = starID(key)
			}
		})
		// wait for feeds to complete so there are no more tasks to queue
		wg.Wait()
		// then finish enqueuing tasks
		close(tc)
		<-done
	})
	if numStories > 0 {
		c.Step("numStories", func(c mpg.Context) {
			stories := make([]*Story, 0, numStories)
			for _, v := range fl {
				stories = append(stories, v...)
			}
			sort.Sort(sort.Reverse(Stories(stories)))
			if len(stories) > numStoriesLimit {
				stories = stories[:numStoriesLimit]
				fl = make(map[string][]*Story)
				for _, s := range stories {
					fk := s.Parent.StringID()
					p := fl[fk]
					fl[fk] = append(p, s)
				}
			}
			last := stories[len(stories)-1].Created
			if u.Read.Before(last) {
				u.Read = last
				putU = true
				fixRead = true
			}
		})
	}
	if fixRead {
		c.Step("fix read", func(c mpg.Context) {
			nread := make(Read)
			for k, v := range fl {
				for _, s := range v {
					rs := readStory{Feed: k, Story: s.Id}
					if read[rs] {
						nread[rs] = true
					}
				}
			}
			if len(nread) != len(read) {
				read = nread
				var b bytes.Buffer
				gob.NewEncoder(&b).Encode(&read)
				ud.Read = b.Bytes()
				putUD = true
				l.Text += ", fix read"
			}
		})
	}
	numStories = 0
	for k, v := range fl {
		newStories := make([]*Story, 0, len(v))
		for _, s := range v {
			if !read[readStory{Feed: k, Story: s.Id}] {
				newStories = append(newStories, s)
			}
		}
		numStories += len(newStories)
		fl[k] = newStories
	}
	if numStories == 0 {
		l.Text += ", clear read"
		fixRead = false
		if ud.Read != nil {
			putUD = true
			ud.Read = nil
		}
		last := u.Read
		for _, v := range feeds {
			if last.Before(v.Date) {
				last = v.Date
			}
		}
		c.Infof("nothing here, move up: %v -> %v", u.Read, last)
		if u.Read.Before(last) {
			putU = true
			u.Read = last
		}
	}
	if updatedLinks {
		backupOPML(c)
		if o, err := json.Marshal(&uf); err == nil {
			ud.Opml = o
			putUD = true
			l.Text += ", update links"
		} else {
			c.Errorf("json UL err: %v, %v", err, uf)
		}
	}
	if putU {
		gn.Put(u)
		l.Text += ", putU"
	}
	if putUD {
		gn.Put(ud)
		l.Text += ", putUD"
	}
	l.Text += fmt.Sprintf(", len opml %v", len(ud.Opml))
	gn.Put(l)
	c.Step("json marshal", func(c mpg.Context) {
		gn := goon.FromContext(c)
		o := struct {
			Opml           []*OpmlOutline
			Stories        map[string][]*Story
			Options        string
			TrialRemaining int
			Feeds          []*Feed
			Stars          []string
			UnreadDate     time.Time
			UntilDate      int64
		}{
			Opml:           uf.Outline,
			Stories:        fl,
			Options:        u.Options,
			TrialRemaining: trialRemaining,
			Feeds:          feeds,
			Stars:          stars,
			UnreadDate:     u.Read,
			UntilDate:      u.Until.Unix(),
		}
		b, err := json.Marshal(o)
		if err != nil {
			c.Errorf("cleaning")
			for _, v := range fl {
				for _, s := range v {
					n := sanitizer.CleanNonUTF8(s.Summary)
					if n != s.Summary {
						s.Summary = n
						c.Errorf("cleaned %v", s.Id)
						gn.Put(s)
					}
				}
			}
			b, _ = json.Marshal(o)
		}
		w.Write(b)
	})
}
Example #2
0
func updateFeed(c mpg.Context, url string, feed *Feed, stories []*Story, updateAll, fromSub, updateLast bool) error {
	gn := goon.FromContext(c)
	f := Feed{Url: url}
	if err := gn.Get(&f); err != nil {
		return fmt.Errorf("feed not found: %s", url)
	}
	gn.Put(&Log{
		Parent: gn.Key(&f),
		Id:     time.Now().UnixNano(),
		Text:   "feed update",
	})

	// Compare the feed's listed update to the story's update.
	// Note: these may not be accurate, hence, only compare them to each other,
	// since they should have the same relative error.
	storyDate := f.Updated

	hasUpdated := !feed.Updated.IsZero()
	isFeedUpdated := f.Updated.Equal(feed.Updated)
	if !hasUpdated {
		feed.Updated = f.Updated
	}
	feed.Date = f.Date
	feed.Average = f.Average
	feed.LastViewed = f.LastViewed
	f = *feed
	if updateLast {
		f.LastViewed = time.Now()
	}

	if hasUpdated && isFeedUpdated && !updateAll && !fromSub {
		c.Infof("feed %s already updated to %v, putting", url, feed.Updated)
		f.Updated = time.Now()
		scheduleNextUpdate(c, &f)
		gn.Put(&f)
		return nil
	}

	c.Debugf("hasUpdate: %v, isFeedUpdated: %v, storyDate: %v, stories: %v", hasUpdated, isFeedUpdated, storyDate, len(stories))
	puts := []interface{}{&f}

	// find non existant stories
	fk := gn.Key(&f)
	getStories := make([]*Story, len(stories))
	for i, s := range stories {
		getStories[i] = &Story{Id: s.Id, Parent: fk}
	}
	err := gn.GetMulti(getStories)
	if _, ok := err.(appengine.MultiError); err != nil && !ok {
		c.Errorf("GetMulti error: %v", err)
		return err
	}
	var updateStories []*Story
	for i, s := range getStories {
		if goon.NotFound(err, i) {
			updateStories = append(updateStories, stories[i])
		} else if (!stories[i].Updated.IsZero() && !stories[i].Updated.Equal(s.Updated)) || updateAll {
			if !s.Created.IsZero() {
				stories[i].Created = s.Created
			}
			if !s.Published.IsZero() {
				stories[i].Published = s.Published
			}
			updateStories = append(updateStories, stories[i])
		}
	}
	c.Debugf("%v update stories", len(updateStories))

	for _, s := range updateStories {
		puts = append(puts, s)
		sc := StoryContent{
			Id:     1,
			Parent: gn.Key(s),
		}
		buf := &bytes.Buffer{}
		if gz, err := gzip.NewWriterLevel(buf, gzip.BestCompression); err == nil {
			gz.Write([]byte(s.content))
			gz.Close()
			sc.Compressed = buf.Bytes()
		}
		if len(sc.Compressed) == 0 {
			sc.Content = s.content
		}
		if _, err := gn.Put(&sc); err != nil {
			c.Errorf("put sc err: %v", err)
			return err
		}
	}

	c.Debugf("putting %v entities", len(puts))
	if len(puts) > 1 {
		updateAverage(&f, f.Date, len(puts)-1)
		f.Date = time.Now()
		if !hasUpdated {
			f.Updated = f.Date
		}
	}
	scheduleNextUpdate(c, &f)
	if fromSub {
		wait := time.Now().Add(time.Hour * 6)
		if f.NextUpdate.Before(wait) {
			f.NextUpdate = wait
		}
	}
	delay := f.NextUpdate.Sub(time.Now())
	c.Infof("next update scheduled for %v from now", delay-delay%time.Second)
	_, err = gn.PutMulti(puts)
	if err != nil {
		c.Errorf("update put err: %v", err)
	}
	return err
}