Golang Context.Infof方法代碼示例

func UpdateFeeds(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	q := datastore.NewQuery("F").KeysOnly().Filter("n <=", time.Now())
	q = q.Limit(10 * 60 * 2) // 10/s queue, 2 min cron
	it := q.Run(appengine.Timeout(c, time.Minute))
	tc := make(chan *taskqueue.Task)
	done := make(chan bool)
	i := 0
	u := routeUrl("update-feed")
	go taskSender(c, "update-feed", tc, done)
	for {
		k, err := it.Next(nil)
		if err == datastore.Done {
			break
		} else if err != nil {
			c.Errorf("next error: %v", err.Error())
			break
		}
		tc <- taskqueue.NewPOSTTask(u, url.Values{
			"feed": {k.StringID()},
		})
		i++
	}
	close(tc)
	<-done
	c.Infof("updating %d feeds", i)
}

func UpdateFeed(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	gn := goon.FromContext(c)
	url := r.FormValue("feed")
	c.Debugf("update feed %s", url)
	f := Feed{Url: url}
	if err := gn.Get(&f); err == datastore.ErrNoSuchEntity {
		return
	} else if time.Now().Before(f.NextUpdate) {
		c.Infof("feed %v already updated", url)
		return
	}
	if feed, stories := fetchFeed(c, url, url); feed != nil {
		updateFeed(c, url, feed, stories)
	} else {
		f.Errors++
		v := f.Errors + 1
		const max = 24 * 7
		if v > max {
			v = max
		} else if f.Errors == 1 {
			v = 0
		}
		f.NextUpdate = time.Now().Add(time.Hour * time.Duration(v))
		gn.Put(&f)
		c.Warningf("error with %v (%v), bump next update to %v", url, f.Errors, f.NextUpdate)
	}
}

func SubscribeCallback(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	gn := goon.FromContext(c)
	vars := mux.Vars(r)
	b, _ := base64.URLEncoding.DecodeString(vars["feed"])
	f := Feed{Url: string(b)}
	if err := gn.Get(&f); err != nil {
		http.Error(w, "", http.StatusNotFound)
		return
	}
	if r.Method == "GET" {
		if r.FormValue("hub.mode") != "subscribe" || r.FormValue("hub.topic") != f.Url {
			http.Error(w, "", http.StatusNotFound)
			return
		}
		w.Write([]byte(r.FormValue("hub.challenge")))
		i, _ := strconv.Atoi(r.FormValue("hub.lease_seconds"))
		f.Subscribed = time.Now().Add(time.Second * time.Duration(i))
		gn.Put(&f)
		c.Debugf("subscribed: %v - %v", f.Url, f.Subscribed)
		return
	} else {
		c.Infof("push: %v", f.Url)
		defer r.Body.Close()
		b, _ := ioutil.ReadAll(r.Body)
		nf, ss := ParseFeed(c, f.Url, b)
		err := updateFeed(c, f.Url, nf, ss)
		if err != nil {
			c.Errorf("push error: %v", err)
		}
	}
}

func UpdateFeeds(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	gn := goon.FromContext(c)
	q := datastore.NewQuery(gn.Key(&Feed{}).Kind()).KeysOnly()
	q = q.Filter("n <=", time.Now()).Limit(3000)
	it := gn.Run(q)
	i := 0
	for {
		k, err := it.Next(nil)
		if err == datastore.Done {
			break
		} else if err != nil {
			c.Errorf("next error: %v", err.Error())
			break
		}
		t := taskqueue.NewPOSTTask(routeUrl("update-feed"), url.Values{
			"feed": {k.StringID()},
		})
		if _, err := taskqueue.Add(c, t, "update-feed"); err != nil {
			c.Errorf("taskqueue error: %v", err.Error())
		}
		i++
	}
	c.Infof("updating %d feeds", i)
	fmt.Fprintf(w, "updating %d feeds", i)
}

func DeleteOldFeed(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	g := goon.FromContext(c)
	oldDate := time.Now().Add(-time.Hour * 24 * 90)
	feed := Feed{Url: r.FormValue("f")}
	if err := g.Get(&feed); err != nil {
		c.Criticalf("err: %v", err)
		return
	}
	if feed.LastViewed.After(oldDate) {
		return
	}
	q := datastore.NewQuery(g.Kind(&Story{})).Ancestor(g.Key(&feed)).KeysOnly()
	keys, err := q.GetAll(c, nil)
	if err != nil {
		c.Criticalf("err: %v", err)
		return
	}
	q = datastore.NewQuery(g.Kind(&StoryContent{})).Ancestor(g.Key(&feed)).KeysOnly()
	sckeys, err := q.GetAll(c, nil)
	if err != nil {
		c.Criticalf("err: %v", err)
		return
	}
	keys = append(keys, sckeys...)
	c.Infof("delete: %v - %v", feed.Url, len(keys))
	err = g.DeleteMulti(keys)
	if err != nil {
		c.Criticalf("err: %v", err)
	}
}

func SubscribeFeed(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	gn := goon.FromContext(c)
	f := Feed{Url: r.FormValue("feed")}
	if err := gn.Get(&f); err != nil {
		c.Errorf("%v: %v", err, f.Url)
		serveError(w, err)
		return
	} else if f.IsSubscribed() {
		return
	}
	u := url.Values{}
	u.Add("hub.callback", f.PubSubURL())
	u.Add("hub.mode", "subscribe")
	u.Add("hub.verify", "sync")
	fu, _ := url.Parse(f.Url)
	fu.Fragment = ""
	u.Add("hub.topic", fu.String())
	req, err := http.NewRequest("POST", PUBSUBHUBBUB_HUB, strings.NewReader(u.Encode()))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	cl := urlfetch.Client(c)
	resp, err := cl.Do(req)
	if err != nil {
		c.Errorf("req error: %v", err)
	} else if resp.StatusCode != 204 {
		c.Errorf("resp: %v - %v", f.Url, resp.Status)
		c.Errorf("%s", resp.Body)
	} else {
		c.Infof("subscribed: %v", f.Url)
	}
}

func UpdateFeeds(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	gn := goon.FromContext(c)
	q := datastore.NewQuery(gn.Key(&Feed{}).Kind()).KeysOnly()
	q = q.Filter("n <=", time.Now())
	retry, _ := strconv.Atoi(r.FormValue("retry"))
	c.Errorf("retry: %v", retry)

	//* iterator
	it := gn.Run(q)
	i := 0
	done := false
	for {
		k, err := it.Next(nil)
		if err == datastore.Done {
			done = true
			break
		} else if err != nil {
			c.Errorf("next error: %v", err.Error())
			break
		}
		t := taskqueue.NewPOSTTask(routeUrl("update-feed"), url.Values{
			"feed": {k.StringID()},
		})
		if _, err := taskqueue.Add(c, t, "update-feed"); err != nil {
			c.Errorf("taskqueue error: %v", err.Error())
		}
		i++
	}
	c.Infof("updating %d feeds", i)
	fmt.Fprintf(w, "updating %d feeds", i)
	if !done {
		time.Sleep(time.Second * time.Duration(i) / 50) // sleep about the time it'll take to process them
		t := taskqueue.NewPOSTTask("/tasks/update-feeds", url.Values{
			"retry": {strconv.Itoa(retry + 1)},
		})
		if _, err := taskqueue.Add(c, t, "update-feeds"); err != nil {
			c.Errorf("taskqueue update feeds error: %v", err.Error())
		}
		c.Errorf("ran update again")
		fmt.Fprintf(w, "\nran update again")
	}
	//*/

	/* get all
	q = q.Limit(1000)
	keys, _ := gn.GetAll(q, nil)
	for _, k := range keys {
		t := taskqueue.NewPOSTTask(routeUrl("update-feed"), url.Values{
			"feed": {k.StringID()},
		})
		if _, err := taskqueue.Add(c, t, "update-feed"); err != nil {
			c.Errorf("taskqueue error: %v", err.Error())
		}
	}
	c.Infof("updating %d feeds", len(keys))
	fmt.Fprintf(w, "updating %d feeds", len(keys))
	//*/
}

func UpdateFeeds(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	gn := goon.FromContext(c)
	q := datastore.NewQuery(gn.Key(&Feed{}).Kind()).KeysOnly()
	q = q.Filter("n <=", time.Now())

	q = q.Limit(1000)
	it := gn.Run(q)
	var keys []*datastore.Key
	var del []*datastore.Key
	for {
		k, err := it.Next(nil)
		if err == datastore.Done {
			break
		} else if err != nil {
			c.Errorf("next error: %v", err.Error())
			break
		} else if len(k.StringID()) == 0 {
			del = append(del, k)
			continue
		}
		keys = append(keys, k)
	}
	tasks := make([]*taskqueue.Task, len(keys))
	for i, k := range keys {
		tasks[i] = taskqueue.NewPOSTTask(routeUrl("update-feed"), url.Values{
			"feed": {k.StringID()},
		})
	}
	var ts []*taskqueue.Task
	const taskLimit = 100
	for len(tasks) > 0 {
		if len(tasks) > taskLimit {
			ts = tasks[:taskLimit]
			tasks = tasks[taskLimit:]
		} else {
			ts = tasks
			tasks = tasks[0:0]
		}
		if _, err := taskqueue.AddMulti(c, ts, "update-feed"); err != nil {
			c.Errorf("taskqueue error: %v", err.Error())
		}
	}
	c.Infof("updating %d feeds", len(keys))

	if len(del) > 0 {
		c.Errorf("attempt to delete %v feeds", len(del))
		if err := gn.DeleteMulti(del); err != nil {
			c.Errorf("delete error: %v", err.Error())
		}
		fmt.Fprintf(w, `<html><head><meta http-equiv="refresh" content="0"></head></html>`)
		fmt.Fprintf(w, "attempt to delete %v feeds", len(del))
		for _, k := range del {
			fmt.Fprintf(w, "\n<br>%v", k)
		}
	}
	fmt.Fprintf(w, "updating %d feeds", len(keys))
}

func ClearFeeds(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	if !isDevServer {
		return
	}

	cu := user.Current(c)
	gn := goon.FromContext(c)
	done := make(chan bool)
	go func() {
		u := &User{Id: cu.ID}
		defer func() { done <- true }()
		ud := &UserData{Id: "data", Parent: gn.Key(u)}
		if err := gn.Get(u); err != nil {
			c.Errorf("user del err: %v", err.Error())
			return
		}
		gn.Get(ud)
		u.Read = time.Time{}
		ud.Read = nil
		ud.Opml = nil
		gn.PutMany(u, ud)
		c.Infof("%v cleared", u.Email)
	}()
	del := func(kind string) {
		defer func() { done <- true }()
		q := datastore.NewQuery(kind).KeysOnly()
		keys, err := gn.GetAll(q, nil)
		if err != nil {
			c.Errorf("err: %v", err.Error())
			return
		}
		if err := gn.DeleteMulti(keys); err != nil {
			c.Errorf("err: %v", err.Error())
			return
		}
		c.Infof("%v deleted", kind)
	}
	types := []interface{}{
		&Feed{},
		&Story{},
		&StoryContent{},
		&DateFormat{},
		&Log{},
		&UserOpml{},
	}
	for _, i := range types {
		k := gn.Key(i).Kind()
		go del(k)
	}

	for i := 0; i < len(types); i++ {
		<-done
	}

	http.Redirect(w, r, routeUrl("main"), http.StatusFound)
}

// Task used to subscribe a feed to push.
func SubscribeFeed(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	start := time.Now()
	gn := goon.FromContext(c)
	f := Feed{Url: r.FormValue("feed")}
	fk := gn.Key(&f)
	s := ""
	defer func() {
		gn.Put(&Log{
			Parent: fk,
			Id:     time.Now().UnixNano(),
			Text:   "SubscribeFeed - start " + start.String() + " - f.sub " + f.Subscribed.String() + " - " + s,
		})
	}()
	if err := gn.Get(&f); err != nil {
		c.Errorf("%v: %v", err, f.Url)
		serveError(w, err)
		s += "err"
		return
	} else if f.IsSubscribed() {
		s += "is subscribed"
		return
	}
	u := url.Values{}
	u.Add("hub.callback", f.PubSubURL())
	u.Add("hub.mode", "subscribe")
	u.Add("hub.verify", "sync")
	fu, _ := url.Parse(f.Url)
	fu.Fragment = ""
	u.Add("hub.topic", fu.String())
	req, err := http.NewRequest("POST", f.Hub, strings.NewReader(u.Encode()))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	cl := &http.Client{
		Transport: &urlfetch.Transport{
			Context:  c,
			Deadline: time.Minute,
		},
	}
	resp, err := cl.Do(req)
	if err != nil {
		c.Errorf("req error: %v", err)
	} else if resp.StatusCode != http.StatusNoContent {
		f.Subscribed = time.Now().Add(time.Hour * 48)
		gn.Put(&f)
		if resp.StatusCode != http.StatusConflict {
			c.Errorf("resp: %v - %v", f.Url, resp.Status)
			c.Errorf("%s", resp.Body)
		}
		s += "resp err"
	} else {
		c.Infof("subscribed: %v", f.Url)
		s += "success"
	}
}

func UpdateFeeds(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	gn := goon.FromContext(c)
	q := datastore.NewQuery(gn.Key(&Feed{}).Kind()).KeysOnly()
	q = q.Filter("n <=", time.Now())
	keys, _ := gn.GetAll(q, nil)
	for _, k := range keys {
		t := taskqueue.NewPOSTTask(routeUrl("update-feed"), url.Values{
			"feed": {k.StringID()},
		})
		if _, err := taskqueue.Add(c, t, "update-feed"); err != nil {
			c.Errorf("taskqueue error: %v", err.Error())
		}
	}
	c.Infof("updating %d feeds", len(keys))
}

func UpdateFeeds(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	q := datastore.NewQuery("F").KeysOnly()
	q = q.Filter("n <=", time.Now())
	q = q.Limit(3000)
	var keys []*datastore.Key
	it := q.Run(c)
	retry := 0
	for {
		k, err := it.Next(nil)
		if err != nil {
			c.Errorf("next error: %v, retry: %v", err.Error(), retry)
			if retry == 5 {
				break
			}
			retry++
			it = q.Run(c)
		} else {
			keys = append(keys, k)
		}
	}
	if len(keys) == 0 {
		c.Errorf("giving up")
		return
	}

	tasks := make([]*taskqueue.Task, len(keys))
	for i, k := range keys {
		c.Infof("task: %v, %v", i, k)
		tasks[i] = taskqueue.NewPOSTTask(routeUrl("update-feed"), url.Values{
			"feed": {k.StringID()},
		})
	}
	var ts []*taskqueue.Task
	const taskLimit = 100
	for len(tasks) > 0 {
		if len(tasks) > taskLimit {
			ts = tasks[:taskLimit]
			tasks = tasks[taskLimit:]
		} else {
			ts = tasks
			tasks = tasks[0:0]
		}
		if _, err := taskqueue.AddMulti(c, ts, "update-feed"); err != nil {
			c.Errorf("taskqueue error: %v", err.Error())
		}
	}
	c.Infof("updating %d feeds", len(keys))
}

func addFeed(c mpg.Context, userid string, outline *OpmlOutline) error {
	gn := goon.FromContext(c)
	o := outline.Outline[0]
	c.Infof("adding feed %v to user %s", o.XmlUrl, userid)
	fu, ferr := url.Parse(o.XmlUrl)
	if ferr != nil {
		return ferr
	}
	fu.Fragment = ""
	o.XmlUrl = fu.String()

	f := Feed{Url: o.XmlUrl}
	if err := gn.Get(&f); err == datastore.ErrNoSuchEntity {
		if feed, stories, err := fetchFeed(c, o.XmlUrl, o.XmlUrl); err != nil {
			return fmt.Errorf("could not add feed %s: %v", o.XmlUrl, err)
		} else {
			f = *feed
			f.Updated = time.Time{}
			f.Checked = f.Updated
			f.NextUpdate = f.Updated
			f.LastViewed = time.Now()
			gn.Put(&f)
			for _, s := range stories {
				s.Created = s.Published
			}
			if err := updateFeed(c, f.Url, feed, stories, false, false, false); err != nil {
				return err
			}

			o.XmlUrl = feed.Url
			o.HtmlUrl = feed.Link
			if o.Title == "" {
				o.Title = feed.Title
			}
		}
	} else if err != nil {
		return err
	} else {
		o.HtmlUrl = f.Link
		if o.Title == "" {
			o.Title = f.Title
		}
	}
	o.Text = ""

	return nil
}

func AdminUser(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	gn := goon.FromContext(c)
	q := datastore.NewQuery(gn.Kind(&User{})).Limit(1)
	q = q.Filter("e =", r.FormValue("u"))
	it := gn.Run(q)
	var u User
	ud := UserData{Id: "data"}
	var h []Log
	k, err := it.Next(&u)
	if err != nil {
		serveError(w, err)
		return
	}
	ud.Parent = gn.Key(&u)
	gn.Get(&ud)
	until := r.FormValue("until")
	if d, err := time.Parse("2006-01-02", until); err == nil {
		u.Until = d
		gn.Put(&u)
	}
	if o := []byte(r.FormValue("opml")); len(o) > 0 {
		opml := Opml{}
		if err := json.Unmarshal(o, &opml); err != nil {
			serveError(w, err)
			return
		}
		ud.Opml = o
		if _, err := gn.Put(&ud); err != nil {
			serveError(w, err)
			return
		}
		c.Infof("opml updated")
	}
	q = datastore.NewQuery(gn.Kind(&Log{})).Ancestor(k)
	_, err = gn.GetAll(q, &h)
	if err := templates.ExecuteTemplate(w, "admin-user.html", struct {
		User User
		Data UserData
		Log  []Log
	}{
		u,
		ud,
		h,
	}); err != nil {
		serveError(w, err)
	}
}

func UpdateFeeds(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	q := datastore.NewQuery("F").KeysOnly().Filter("n <=", time.Now())
	q = q.Limit(10 * 60 * 20) // 10/s queue, 20 min cron
	var keys []*datastore.Key
	it := q.Run(appengine.Timeout(c, time.Second*60))
	for {
		k, err := it.Next(nil)
		if err == datastore.Done {
			break
		} else if err != nil {
			c.Errorf("next error: %v", err.Error())
			break
		}
		keys = append(keys, k)
	}

	if len(keys) == 0 {
		c.Errorf("no results")
		return
	}
	c.Infof("updating %d feeds", len(keys))

	var tasks []*taskqueue.Task
	for _, k := range keys {
		tasks = append(tasks, taskqueue.NewPOSTTask(routeUrl("update-feed"), url.Values{
			"feed": {k.StringID()},
		}))
	}
	var ts []*taskqueue.Task
	const taskLimit = 100
	for len(tasks) > 0 {
		if len(tasks) > taskLimit {
			ts = tasks[:taskLimit]
			tasks = tasks[taskLimit:]
		} else {
			ts = tasks
			tasks = tasks[0:0]
		}
		if _, err := taskqueue.AddMulti(c, ts, "update-feed"); err != nil {
			c.Errorf("taskqueue error: %v", err.Error())
		}
	}
}