Example #1
0
func QueryKeys(c appengine.Context, cursor string) ([]Key, string, error) {
	var items []Key
	q := datastore.NewQuery("Key")
	if cursor != "" {
		dCursor, err := datastore.DecodeCursor(string(cursor))
		if err == nil {
			q = q.Start(dCursor)
		}
	}
	t := q.Run(c)
	for i := 0; i < 10; i++ {
		var item Key
		k, err := t.Next(&item)
		if err == datastore.Done {
			break
		}
		if err != nil {
			return items, "", nil
		}
		item.Id = k.StringID()
		item.Agent.Get(c, item.AgentId)
		item.Portal.Get(c, item.PortalId)
		items = append(items, item)
	}
	returnedCursor, err := t.Cursor()
	if err != nil {
		return items, "", err
	}
	return items, returnedCursor.String(), nil
}
Example #2
0
// GetNewestItems returns the latest number elements for a specific namespace
func GetNewestItems(c appengine.Context, namespace string, limit int, cursor string) ([]Item, string, error) {

	q := datastore.NewQuery("Item").
		Filter("Namespace =", namespace).
		Order("-CreatedAt").
		Limit(limit)

	if cursor, err := datastore.DecodeCursor(cursor); err == nil {
		q = q.Start(cursor)
	}

	var is []Item
	var err error
	t := q.Run(c)
	for {
		var i Item
		_, err = t.Next(&i)
		if err == datastore.Done {
			break
		}

		is = append(is, i)
		if err != nil {
			c.Errorf("Error fetching next item for namespace %v: %v", namespace, err)
			return nil, "", err
		}
	}

	if cursor, err := t.Cursor(); err == nil {
		return is, cursor.String(), nil
	}

	return nil, "", err
}
Example #3
0
func query2(w http.ResponseWriter, r *http.Request) {

	c := appengine.NewContext(r)

	// start cursor1 OMIT
	q := datastore.NewQuery("Book").Filter("Author=", "author-1").Order("-CreatedAt")

	pCursor := r.FormValue("cursor")
	if pCursor != "" {
		cursor, err := datastore.DecodeCursor(pCursor)
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
		q.Start(cursor)
	}
	// end cursor1 OMIT

	// start cursor2 OMIT
	var books []Book

	t := q.Run(c)
	for i := 0; i < 10; i++ {
		var book Book
		key, err := t.Next(&book)
		if err == datastore.Done {
			break
		}
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		c.Debugf("#v", key)

		books = append(books, book)
	}
	// end cursor2 OMIT

	response := struct {
		Cursor string
		Books  []Book
	}{
		Books: books,
	}

	// start cursor3 OMIT
	response.Books = books
	if cursor, err := t.Cursor(); err == nil {
		response.Cursor = cursor.String()
	}
	// end cursor3 OMIT

	je := json.NewEncoder(w)
	if err := je.Encode(response); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
}
Example #4
0
func GetFeed(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	gn := goon.FromContext(c)
	f := Feed{Url: r.FormValue("f")}
	var stars []string
	wg := sync.WaitGroup{}
	fk := gn.Key(&f)
	q := datastore.NewQuery(gn.Kind(&Story{})).Ancestor(fk).KeysOnly()
	q = q.Order("-" + IDX_COL)
	if cur := r.FormValue("c"); cur != "" {
		if dc, err := datastore.DecodeCursor(cur); err == nil {
			q = q.Start(dc)
		}
	} else {
		// grab the stars list on the first run
		wg.Add(1)
		go c.Step("stars", func(c mpg.Context) {
			gn := goon.FromContext(c)
			usk := starKey(c, f.Url, "")
			q := datastore.NewQuery(gn.Kind(&UserStar{})).Ancestor(gn.Key(usk).Parent()).KeysOnly()
			keys, _ := gn.GetAll(q, nil)
			stars = make([]string, len(keys))
			for i, key := range keys {
				stars[i] = starID(key)
			}
			wg.Done()
		})
	}
	iter := gn.Run(q)
	var stories []*Story
	for i := 0; i < 20; i++ {
		if k, err := iter.Next(nil); err == nil {
			stories = append(stories, &Story{
				Id:     k.StringID(),
				Parent: k.Parent(),
			})
		} else if err == datastore.Done {
			break
		} else {
			serveError(w, err)
			return
		}
	}
	cursor := ""
	if ic, err := iter.Cursor(); err == nil {
		cursor = ic.String()
	}
	gn.GetMulti(&stories)
	wg.Wait()
	b, _ := json.Marshal(struct {
		Cursor  string
		Stories []*Story
		Stars   []string `json:",omitempty"`
	}{
		Cursor:  cursor,
		Stories: stories,
		Stars:   stars,
	})
	w.Write(b)
}
Example #5
0
func GetStars(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	gn := goon.FromContext(c)
	cu := user.Current(c)
	u := User{Id: cu.ID}
	q := datastore.NewQuery(gn.Key(&UserStar{}).Kind()).
		Ancestor(gn.Key(&u)).
		Order("-c").
		Limit(20)
	if cur := r.FormValue("c"); cur != "" {
		if dc, err := datastore.DecodeCursor(cur); err == nil {
			q = q.Start(dc)
		}
	}
	iter := gn.Run(q)
	stars := make(map[string]int64)
	var us UserStar
	var stories []*Story
	for {
		if k, err := iter.Next(&us); err == nil {
			stars[starID(k)] = us.Created.Unix()
			stories = append(stories, &Story{
				Id:     k.StringID(),
				Parent: gn.Key(&Feed{Url: k.Parent().StringID()}),
			})
		} else if err == datastore.Done {
			break
		} else {
			serveError(w, err)
			return
		}
	}
	cursor := ""
	if ic, err := iter.Cursor(); err == nil {
		cursor = ic.String()
	}
	var smap map[string][]*Story
	if len(stories) > 0 {
		gn.GetMulti(&stories)
		smap = make(map[string][]*Story)
		for _, s := range stories {
			f := s.Parent.StringID()
			smap[f] = append(smap[f], s)
		}
	}
	b, _ := json.Marshal(struct {
		Cursor  string
		Stories map[string][]*Story
		Stars   map[string]int64
	}{
		Cursor:  cursor,
		Stories: smap,
		Stars:   stars,
	})
	w.Write(b)
}
Example #6
0
func applyCursor(query_in *datastore.Query, cursor_in string) (query_out *datastore.Query, err error) {
	if cursor_in != "" {
		cursor, err := datastore.DecodeCursor(cursor_in)
		if err == nil {
			return query_in.Start(cursor), nil
		} else {
			return query_in, err
		}
	} else {
		return query_in, nil
	}
}
Example #7
0
func decodeDatastoreCursorValue(d *Decoder, v reflect.Value) error {
	s, err := d.DecodeString()
	if err != nil {
		return err
	}
	cursor, err := ds.DecodeCursor(s)
	if err != nil {
		return err
	}
	v.Set(reflect.ValueOf(cursor))
	return nil
}
Example #8
0
func SitemapFeed(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)
	feed := vars["feed"]
	fk, err := datastore.DecodeKey(feed)
	if err != nil {
		serveError(w, err)
		return
	}
	bf := base64.URLEncoding.EncodeToString([]byte(fk.StringID()))
	q := datastore.NewQuery("S").KeysOnly().Ancestor(fk)
	q = q.Limit(Limit)
	cs := r.FormValue("c")
	if len(cs) > 0 {
		if cur, err := datastore.DecodeCursor(cs); err == nil {
			q = q.Start(cur)
		}
	}
	stories := make(map[string]string)
	it := q.Run(c)
	for {
		k, err := it.Next(nil)
		if err == datastore.Done {
			break
		} else if err != nil {
			c.Errorf("next error: %v", err)
			break
		}
		stories[k.StringID()] = base64.URLEncoding.EncodeToString([]byte(k.StringID()))
	}
	cs = ""
	if len(stories) == Limit {
		if cur, err := it.Cursor(); err == nil {
			cs = cur.String()
		}
	}
	if err := templates.ExecuteTemplate(w, "sitemap-feed.html", struct {
		Feed, Feed64 string
		Stories      map[string]string
		Cursor       string
	}{
		Feed:    feed,
		Feed64:  bf,
		Stories: stories,
		Cursor:  cs,
	}); err != nil {
		c.Errorf("%v", err)
		serveError(w, err)
		return
	}
}
Example #9
0
func BackendStart(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	return
	const sz = 100
	ic := 0
	var f func(appengine.Context)
	var cs string
	f = func(c appengine.Context) {
		gn := goon.FromContext(c)
		c.Errorf("ic: %d", ic)
		wg := sync.WaitGroup{}
		wg.Add(sz)
		var j int64
		q := datastore.NewQuery("F").KeysOnly()
		if cs != "" {
			if cur, err := datastore.DecodeCursor(cs); err == nil {
				q = q.Start(cur)
				c.Errorf("cur start: %v", cur)
			}
		}
		it := q.Run(c)
		for j = 0; j < sz; j++ {
			k, err := it.Next(nil)
			c.Errorf("%v: %v, %v", j, k, err)
			if err != nil {
				c.Criticalf("err: %v", err)
				return
			}

			go func(k *datastore.Key) {
				f := Feed{Url: k.StringID()}
				if err := gn.Get(&f); err == nil {
					f.Subscribe(c)
				}

				wg.Done()
			}(k)
		}
		cur, err := it.Cursor()
		if err == nil {
			cs = cur.String()
		}
		wg.Wait()
		ic++
		runtime.RunInBackground(c, f)
	}
	runtime.RunInBackground(c, f)
}
Example #10
0
// 画像のメタデータ一覧をDSから取得します。
// TODO: 表示する画像数を絞る必要がないなら、Cursor必要ないかも。
func GetImages(c appengine.Context, cursorStr string) ([]Image, string, error) {
	q := datastore.NewQuery("Image").Order("-Date")

	if len(cursorStr) != 0 {
		cursor, err := datastore.DecodeCursor(cursorStr)
		if err != nil {
			return []Image{}, "", err
		}

		q = q.Start(cursor)
	}

	images := []Image{}
	iter := q.Run(c)
	isNext := true
	for {
		var img Image
		_, err := iter.Next(&img)
		if err == datastore.Done {
			isNext = false
			break
		}
		if err != nil {
			c.Errorf("fetching next Person: %s", err.Error())
			break
		}

		err = img.setThumbnailURL(thumbnailsLongestSide, false)
		if err != nil {
			c.Errorf("%s", err.Error())
			break
		}
		images = append(images, img)
	}

	if isNext {
		next_cursor, err := iter.Cursor()
		if err != nil {
			c.Errorf("%s", err.Error())
			return []Image{}, "", err
		}
		return images, next_cursor.String(), nil
	} else {
		return images, "", nil
	}
}
Example #11
0
func GetPortals(c appengine.Context, labels string, checkfavorited bool, favorited []string, cursor string) ([]Portal, string, error) {
	q := datastore.NewQuery("Portal")
	if cursor != "" {
		dCursor, err := datastore.DecodeCursor(string(cursor))
		if err == nil {
			q = q.Start(dCursor)
		}
	}
	if len(labels) == 0 {
		q = q.Limit(30)
	} else {
		splits := strings.Split(labels, " ")
		c.Infof("query....%s", splits)
		q = q.Filter("Labels=", splits[0]).Limit(10)
	}
	var portals []Portal
	t := q.Run(c)
	for i := 0; i < 10; i++ {
		var portal Portal
		_, err := t.Next(&portal)
		if err == datastore.Done {
			break
		}
		if err != nil {
			return portals, "", err
		}
		if _, err := datastore.NewQuery("Key").Filter("PortalId=", portal.Id).GetAll(c, &portal.Keys); err != nil {
			return portals, "", err
		}
		if checkfavorited {
			for _, portalid := range favorited {
				if portalid == portal.Id {
					portals = append(portals, portal)
				}
			}
		} else {
			portals = append(portals, portal)
		}
	}
	cursor1, err := t.Cursor()
	if err != nil {
		return portals, "", err
	}
	return portals, cursor1.String(), nil
}
Example #12
0
func doExpire(c appengine.Context, expireTime time.Time, cursorString string) {
	query := getExpiredQuery(expireTime).KeysOnly()

	if len(cursorString) > 0 {
		if cursor, err := datastore.DecodeCursor(cursorString); err != nil {
			c.Errorf("Failed to decode cursor: %s", err)
			return
		} else {
			query = query.Start(cursor)
		}
	}

	for {
		toDelete := make([]*datastore.Key, 0, 100)

		for queryIterator := query.Run(c); ; {
			peerKey, err := queryIterator.Next(nil)
			if len(toDelete) >= 100 {
				break
			} else if err == datastore.Done {
				c.Infof("Done finding expired peers")
				break
			} else if err != nil {
				c.Criticalf("Failed to get next peer: %#v (%s)", err, err)
				return
			}

			toDelete = append(toDelete, peerKey)
		}

		deleted := len(toDelete)
		c.Infof("Deleting %d expired peers", deleted)
		if err := ds.DeleteMulti(c, toDelete); err != nil {
			c.Criticalf("Failed to delete peers: %#v (%s)", err, err)
			return
		}

		if deleted <= 0 {
			break
		}
	}

	c.Infof("Finished deleting expired peers")
}
Example #13
0
func DeleteOldFeeds(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	ctx := appengine.Timeout(c, time.Minute)
	gn := goon.FromContext(c)
	q := datastore.NewQuery(gn.Kind(&Feed{})).Filter("n=", timeMax).KeysOnly()
	if cur, err := datastore.DecodeCursor(r.FormValue("c")); err == nil {
		q = q.Start(cur)
	}
	it := q.Run(ctx)
	done := false
	var tasks []*taskqueue.Task
	for i := 0; i < 10000 && len(tasks) < 100; i++ {
		k, err := it.Next(nil)
		if err == datastore.Done {
			c.Criticalf("done")
			done = true
			break
		} else if err != nil {
			c.Errorf("err: %v", err)
			continue
		}
		values := make(url.Values)
		values.Add("f", k.StringID())
		tasks = append(tasks, taskqueue.NewPOSTTask("/tasks/delete-old-feed", values))
	}
	if len(tasks) > 0 {
		c.Errorf("deleting %v feeds", len(tasks))
		if _, err := taskqueue.AddMulti(c, tasks, ""); err != nil {
			c.Errorf("err: %v", err)
		}
	}
	if !done {
		if cur, err := it.Cursor(); err == nil {
			values := make(url.Values)
			values.Add("c", cur.String())
			taskqueue.Add(c, taskqueue.NewPOSTTask("/tasks/delete-old-feeds", values), "")
		} else {
			c.Errorf("err: %v", err)
		}
	}
}
Example #14
0
func GetFeed(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	gn := goon.FromContext(c)
	f := Feed{Url: r.FormValue("f")}
	fk := gn.Key(&f)
	q := datastore.NewQuery(gn.Key(&Story{}).Kind()).Ancestor(fk).KeysOnly()
	q = q.Order("-" + IDX_COL)
	if c := r.FormValue("c"); c != "" {
		if dc, err := datastore.DecodeCursor(c); err == nil {
			q = q.Start(dc)
		}
	}
	iter := gn.Run(q)
	var stories []*Story
	for i := 0; i < 20; i++ {
		if k, err := iter.Next(nil); err == nil {
			stories = append(stories, &Story{
				Id:     k.StringID(),
				Parent: k.Parent(),
			})
		} else if err == datastore.Done {
			break
		} else {
			serveError(w, err)
			return
		}
	}
	cursor := ""
	if ic, err := iter.Cursor(); err == nil {
		cursor = ic.String()
	}
	gn.GetMulti(&stories)
	b, _ := json.Marshal(struct {
		Cursor  string
		Stories []*Story
	}{
		Cursor:  cursor,
		Stories: stories,
	})
	w.Write(b)
}
Example #15
0
func Sitemap(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	q := datastore.NewQuery("F").KeysOnly()
	q = q.Limit(Limit)
	cs := r.FormValue("c")
	if len(cs) > 0 {
		if cur, err := datastore.DecodeCursor(cs); err == nil {
			q = q.Start(cur)
		}
	}
	var keys []*datastore.Key
	it := q.Run(c)
	for {
		k, err := it.Next(nil)
		if err == datastore.Done {
			break
		} else if err != nil {
			c.Errorf("next error: %v", err)
			break
		}
		keys = append(keys, k)
	}
	cs = ""
	if len(keys) == Limit {
		if cur, err := it.Cursor(); err == nil {
			cs = cur.String()
		}
	}
	if err := templates.ExecuteTemplate(w, "sitemap.html", struct {
		Keys   []*datastore.Key
		Cursor string
	}{
		Keys:   keys,
		Cursor: cs,
	}); err != nil {
		c.Errorf("%v", err)
		serveError(w, err)
		return
	}
}
Example #16
0
func (it *Iterator) Next() bool {
	if it.offset+1 < len(it.buffer) {
		it.offset++
		it.result = &Token{Kind: it.kind, Hash: it.buffer[it.offset]}
		return true
	}
	if it.done {
		return false
	}
	// Reset buffer and offset
	it.offset = 0
	it.buffer = make([]string, 0, bufferSize)
	// Create query
	// TODO (panamafrancis) Keys only query?
	q := datastore.NewQuery(it.kind).Limit(bufferSize)
	if !it.isAll {
		// Filter on the direction {subject,objekt...}
		q = q.Filter(it.dir.String()+" =", it.name)
	}
	// Get last cursor position
	cursor, err := datastore.DecodeCursor(it.last)
	if err == nil {
		q = q.Start(cursor)
	}
	// Buffer the keys of the next 50 matches
	t := q.Run(it.qs.context)
	for {
		// Quirk of the datastore, you cannot pass a nil value to to Next()
		// even if you just want the keys
		var k *datastore.Key
		skip := false
		if it.kind == quadKind {
			temp := new(QuadEntry)
			k, err = t.Next(temp)
			// Skip if quad has been deleted
			if len(temp.Added) <= len(temp.Deleted) {
				skip = true
			}
		} else {
			temp := new(NodeEntry)
			k, err = t.Next(temp)
			// Skip if node has been deleted
			if temp.Size == 0 {
				skip = true
			}
		}
		if err == datastore.Done {
			it.done = true
			break
		}
		if err != nil {
			glog.Errorf("Error fetching next entry %v", err)
			it.err = err
			return false
		}
		if !skip {
			it.buffer = append(it.buffer, k.StringID())
		}
	}
	// Save cursor position
	cursor, err = t.Cursor()
	if err == nil {
		it.last = cursor.String()
	}
	// Protect against bad queries
	if it.done && len(it.buffer) == 0 {
		glog.Warningf("Query did not return any results")
		return false
	}
	// First result
	it.result = &Token{Kind: it.kind, Hash: it.buffer[it.offset]}
	return true
}
Example #17
0
func UpdateFeeds(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	q := datastore.NewQuery("F").KeysOnly().Filter("n <=", time.Now())
	q = q.Limit(100)
	cs := r.FormValue("c")
	hasCursor := false
	if len(cs) > 0 {
		if cur, err := datastore.DecodeCursor(cs); err == nil {
			q = q.Start(cur)
			hasCursor = true
			c.Infof("starting at %v", cur)
		} else {
			c.Errorf("cursor error %v", err.Error())
		}
	}
	if !hasCursor {
		qs, err := taskqueue.QueueStats(c, []string{"update-feed"}, 0)
		if err != nil || !qs[0].OldestETA.IsZero() {
			c.Errorf("already %v (%v) tasks", qs[0].Tasks, qs[0].Executed1Minute)
			return
		}
	}
	var keys []*datastore.Key
	it := q.Run(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
	} else {
		cur, err := it.Cursor()
		if err != nil {
			c.Errorf("to cur error %v", err.Error())
		} else {
			c.Infof("add with cur %v", cur)
			t := taskqueue.NewPOSTTask(routeUrl("update-feeds"), url.Values{
				"c": {cur.String()},
			})
			taskqueue.Add(c, t, "update-feed")
		}
	}
	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())
		}
	}
}
Example #18
0
func batchMap(c appengine.Context, w http.ResponseWriter, r *http.Request) {
	start := time.Now()

	if !queueMore(c) {
		c.Infof("Too many jobs queued, backing off")
		http.Error(w, "Busy", 503)
		return
	}

	q := datastore.NewQuery(r.FormValue("type")).KeysOnly()
	if cstr := r.FormValue("cursor"); cstr != "" {
		cursor, err := datastore.DecodeCursor(cstr)
		maybePanic(err)
		c.Infof("Starting from cursor %v", cstr)
		q = q.Start(cursor)
	}

	keys := []string{}
	finished := false
	t := q.Run(c)
	for i := 0; i < 10000; i++ {
		k, err := t.Next(nil)
		if err == datastore.Done {
			finished = true
			break
		} else if err != nil {
			http.Error(w, err.Error(), 500)
			return
		}
		keys = append(keys, k.Encode())
	}

	c.Infof("Got %v %v keys in %v, finished=%v",
		len(keys), r.FormValue("type"), time.Since(start), finished)

	for len(keys) > 0 && r.FormValue("next") != "" {
		subkeys := keys
		if len(subkeys) > 100 {
			subkeys = keys[:100]
			keys = keys[100:]
		} else {
			keys = nil
		}

		buf := &bytes.Buffer{}
		z := gzip.NewWriter(buf)
		e := json.NewEncoder(z)
		maybePanic(e.Encode(subkeys))
		maybePanic(z.Flush())
		maybePanic(z.Close())

		c.Infof("Queueing %v with %v bytes of compressed keys",
			mapStage2, buf.Len())

		task := &taskqueue.Task{
			Path:    r.FormValue("next"),
			Payload: buf.Bytes(),
		}
		_, err := taskqueue.Add(c, task, mapStage2)
		maybePanic(err)
	}

	if !finished {
		cursor, err := t.Cursor()
		maybePanic(err)

		c.Infof("Requesting more from %v", cursor.String())
		r.Form.Set("cursor", cursor.String())
		taskqueue.Add(c, taskqueue.NewPOSTTask("/batch/map", r.Form), mapStage1)
	}

	w.WriteHeader(201)
}
Example #19
0
func (runner *runner) StartFrom(cursor string) *runner {
	c, _ := datastore.DecodeCursor(cursor)
	runner.query = runner.query.Start(c)
	return runner
}
Example #20
0
File: logs.go Project: icza/iczagps
// logs is the logic implementation of the Logs page.
func logs(p *page.Params) {
	c := p.AppCtx

	// First get devices
	var devices []*ds.Device
	if devices, p.Err = cache.GetDevListForAccKey(c, p.Account.GetKey(c)); p.Err != nil {
		return
	}
	p.Custom["Devices"] = devices

	fv := p.Request.FormValue

	p.Custom["Before"] = fv("before")
	p.Custom["After"] = fv("after")
	p.Custom["SearchLoc"] = fv("loc")

	if fv("devID") == "" {
		// No device chosen yet
		return
	}

	var err error

	var devID int64
	if devID, err = strconv.ParseInt(string(fv("devID")), 10, 64); err != nil {
		p.ErrorMsg = "Invalid Device! Please select a Device from the list below."
		return
	}
	// Check if device is owned by the user:
	var dev *ds.Device
	for _, d := range devices {
		if d.KeyID == devID {
			dev = d
			p.Custom["Device"] = d
			break
		}
	}

	if dev == nil {
		p.ErrorMsg = "You do not have access to the specified Device! Please select a Device from the list below."
		return
	}

	// Parse filters:
	var before time.Time
	if fv("before") != "" {
		if before, err = p.ParseTime(timeLayout, strings.TrimSpace(fv("before"))); err != nil {
			p.ErrorMsg = template.HTML(`Invalid <span class="highlight">Before</span>!`)
			return
		}
		// Add 1 second to the parsed time because fraction of a second is not parsed but exists,
		// so this new time will also include records which has the same time up to the second part and has millisecond part too.
		before = before.Add(time.Second)
	}
	var after time.Time
	if fv("after") != "" {
		if after, err = p.ParseTime(timeLayout, strings.TrimSpace(fv("after"))); err != nil {
			p.ErrorMsg = template.HTML(`Invalid <span class="highlight">After</span>!`)
			return
		}
	}
	var searchLoc appengine.GeoPoint
	areaCode := int64(-1)
	if dev.Indexed() && fv("loc") != "" {
		// GPS coordinates; lat must be in range -90..90, lng must be in range -180..180
		baseErr := template.HTML(`Invalid <span class="highlight">Location</span>!`)

		var coords = strings.Split(strings.TrimSpace(fv("loc")), ",")
		if len(coords) != 2 {
			p.ErrorMsg = baseErr
			return
		}
		searchLoc.Lat, err = strconv.ParseFloat(coords[0], 64)
		if err != nil {
			p.ErrorMsg = baseErr
			return
		}
		searchLoc.Lng, err = strconv.ParseFloat(coords[1], 64)
		if err != nil {
			p.ErrorMsg = baseErr
			return
		}
		if !searchLoc.Valid() {
			p.ErrorMsg = template.HTML(`Invalid <span class="highlight">Location</span> specified by latitude and longitude! Valid range: [-90, 90] latitude and [-180, 180] longitude`)
			return
		}
		areaCode = AreaCodeForGeoPt(dev.AreaSize, searchLoc.Lat, searchLoc.Lng)
	}
	var page int

	cursorsString := fv("cursors")
	var cursors = strings.Split(cursorsString, ";")[1:] // Split always returns at least 1 element (and we use semicolon separator before cursors)

	// Form values
	if fv("page") == "" {
		page = 1
	} else {
		page, err = strconv.Atoi(fv("page"))
		if err != nil || page < 1 {
			page = 1
		}
		if page > len(cursors) { // If page is provided, so are (should be) the cursors
			page = len(cursors)
		}
	}

	switch {
	case fv("submitFirstPage") != "":
		page = 1
	case fv("submitPrevPage") != "":
		if page > 1 {
			page--
		}
	case fv("submitNextPage") != "":
		page++
	}

	pageSize := p.Account.GetLogsPageSize()

	if ps := fv("pageSize"); ps != "" && ps != strconv.Itoa(pageSize) {
		// Page size has been changed (on Settings page), drop cursors, render page 1
		page = 1
		cursorsString = ""
		cursors = make([]string, 0, 1)
	}

	// 'ts all good, proceed with the query:
	q := datastore.NewQuery(ds.ENameGPS).Filter(ds.PNameDevKeyID+"=", devID)
	if !before.IsZero() {
		q = q.Filter(ds.PNameCreated+"<", before)
	}
	if !after.IsZero() {
		q = q.Filter(ds.PNameCreated+">", after)
	}
	if areaCode >= 0 {
		q = q.Filter(ds.PNameAreaCodes+"=", areaCode)
	}
	q = q.Order("-" + ds.PNameCreated).Limit(pageSize)

	var records = make([]*ds.GPS, 0, pageSize)

	// If there is a cursor, set it.
	// Page - cursor index mapping:     cursors[page-2]
	//     1st page: no cursor, 2nd page: cursors[0], 3nd page: cursors[1], ...
	if page > 1 && page <= len(cursors)+1 {
		var cursor datastore.Cursor
		if cursor, p.Err = datastore.DecodeCursor(cursors[page-2]); p.Err != nil {
			return
		}
		q = q.Start(cursor)
	}

	// Iterate over the results:
	t := q.Run(c)
	for {
		r := new(ds.GPS)
		_, err := t.Next(r)
		if err == datastore.Done {
			break
		}
		if err != nil {
			// Datastore error
			p.Err = err
			return
		}
		records = append(records, r)
		r.Dd = -1 // For now, will be set if applicable
		if r.Track() {
			// Check the previous (in time) record and calculate distance.
			// If previous is not a Track, check the one before that etc.
			for i := len(records) - 2; i >= 0; i-- {
				if prev := records[i]; prev.Track() {
					prev.Dd = Distance(r.GeoPoint.Lat, r.GeoPoint.Lng, prev.GeoPoint.Lat, prev.GeoPoint.Lng)
					prev.Dt = prev.Created.Sub(r.Created)
					break
				}
			}
		}
	}

	if len(records) == 0 {
		// End of list reached, disable Next page button:
		p.Custom["EndOfList"] = true
	}

	if page == 1 || page > len(cursors) {
		// Get updated cursor and store it for next page:
		var cursor datastore.Cursor
		if cursor, p.Err = t.Cursor(); p.Err != nil {
			return
		}
		cursorString := cursor.String()
		if page == 1 {
			// If new records were inserted, they appear on the first page in which case
			// the cursor for the 2nd page changes (and all other cursors will change).
			// In this case drop all the cursors:
			if len(cursors) > 0 && cursors[0] != cursorString {
				cursorsString = ""
				cursors = make([]string, 0, 1)
			}
		} else {
			// When end of list is reached, the same cursor will be returned
			if len(records) == 0 && page == len(cursors)+1 && cursors[page-2] == cursorString {
				// Add 1 extra, empty page, but not more.
				if page > 2 && cursors[page-3] == cursorString {
					// An extra, empty page has already been added, do not add more:
					page--
				}
			}
		}

		if page > len(cursors) {
			cursors = append(cursors, cursorString)
			cursorsString += ";" + cursorString
		}
	}

	// Calculate labels: '1'..'9' then 'A'...
	for i, lbl := len(records)-1, '1'; i >= 0; i-- {
		if r := records[i]; r.Track() {
			r.Label = lbl
			if lbl == '9' {
				lbl = 'A' - 1
			}
			lbl++
		}
	}

	p.Custom["CursorList"] = cursors
	p.Custom["Cursors"] = cursorsString

	p.Custom["Page"] = page
	p.Custom["PageSize"] = pageSize
	p.Custom["RecordOffset"] = (page-1)*pageSize + 1
	p.Custom["Records"] = records
	if p.Mobile {
		p.Custom["MapWidth"], p.Custom["MapHeight"] = p.Account.GetMobMapPrevSize()
		p.Custom["MapImgFormat"] = p.Account.GetMobMapImgFormat()
	} else {
		p.Custom["MapWidth"], p.Custom["MapHeight"] = p.Account.GetMapPrevSize()
	}
	p.Custom["APIKey"] = "AIzaSyCEU_tZ1n0-mMg4woGKIfPqdbi0leSKvjg"
	p.Custom["AllMarkers"] = allMarkers(records)

	if len(records) == 0 {
		if page == 1 {
			if before.IsZero() && after.IsZero() && areaCode < 0 {
				p.Custom["PrintNoRecordsForDev"] = true
			} else {
				p.Custom["PrintNoMatchForFilters"] = true
			}
		} else {
			p.Custom["PrintNoMoreRecords"] = true
		}
	}
}
Example #21
0
func CFixer(c mpg.Context, w http.ResponseWriter, r *http.Request) {
	q := datastore.NewQuery("F").KeysOnly()
	q = q.Limit(1000)
	cs := r.FormValue("c")
	if len(cs) > 0 {
		if cur, err := datastore.DecodeCursor(cs); err == nil {
			q = q.Start(cur)
			c.Infof("starting at %v", cur)
		} else {
			c.Errorf("cursor error %v", err.Error())
		}
	}
	var keys []*datastore.Key
	it := q.Run(Timeout(c, time.Second*15))
	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
	} else {
		cur, err := it.Cursor()
		if err != nil {
			c.Errorf("to cur error %v", err.Error())
		} else {
			c.Infof("add with cur %v", cur)
			t := taskqueue.NewPOSTTask("/tasks/cfixer", url.Values{
				"c": {cur.String()},
			})
			taskqueue.Add(c, t, "cfixer")
		}
	}
	c.Infof("fixing %d feeds", len(keys))

	var tasks []*taskqueue.Task
	for _, k := range keys {
		c.Infof("f: %v", k.StringID())
		tasks = append(tasks, taskqueue.NewPOSTTask("/tasks/cfix", 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, "cfixer"); err != nil {
			c.Errorf("taskqueue error: %v", err.Error())
		}
	}
}
Example #22
0
func NewArticlePage(c appengine.Context, filter ArticleFilter, start string) (*ArticlePage, error) {
	scopeKey, err := filter.key(c)
	if err != nil {
		return nil, err
	}

	q := datastore.NewQuery("Article").Ancestor(scopeKey).Order("-Fetched").Order("-Published")
	if filter.Property != "" {
		q = q.Filter("Properties = ", filter.Property)
	} else if filter.Tag != "" {
		q = q.Filter("Tags = ", filter.Tag)
	}

	if start != "" {
		if cursor, err := datastore.DecodeCursor(start); err == nil {
			q = q.Start(cursor)
		} else {
			return nil, err
		}
	}

	t := q.Run(c)

	articles := make([]Article, articlePageSize)
	entryKeys := make([]*datastore.Key, articlePageSize)

	var readCount int
	for readCount = 0; readCount < articlePageSize; readCount++ {
		article := &articles[readCount]

		if _, err := t.Next(article); err != nil && err == datastore.Done {
			break
		} else if IsFieldMismatch(err) {
			// Ignore - migration issue
		} else if err != nil {
			return nil, err
		}

		entryKey := article.Entry

		article.ID = entryKey.StringID()
		article.Source = entryKey.Parent().StringID()

		entryKeys[readCount] = entryKey
	}

	continueFrom := ""
	if readCount >= articlePageSize {
		if cursor, err := t.Cursor(); err == nil {
			continueFrom = cursor.String()
		}
	}

	articles = articles[:readCount]
	entryKeys = entryKeys[:readCount]

	entries := make([]Entry, readCount)
	if err := datastore.GetMulti(c, entryKeys, entries); err != nil {
		if multiError, ok := err.(appengine.MultiError); ok {
			for _, singleError := range multiError {
				if singleError != nil {
					// Safely ignore ErrFieldMismatch
					if !IsFieldMismatch(singleError) {
						return nil, err
					}
				}
			}
		} else {
			return nil, err
		}
	}

	for i, _ := range articles {
		if entries[i].HasMedia {
			if media, err := MediaForEntry(c, entryKeys[i]); err != nil {
				c.Warningf("Error loading media for entry: %s", err)
			} else {
				articles[i].Media = media
			}
		}
		articles[i].Details = &entries[i]
		if articles[i].Tags == nil {
			articles[i].Tags = make([]string, 0)
		}
	}

	page := ArticlePage{
		Articles: articles,
		Continue: continueFrom,
	}

	return &page, nil
}
Example #23
0
func guestViewCursor(w http.ResponseWriter, r *http.Request, m map[string]interface{}) {

	c := appengine.NewContext(r)

	q := ds.NewQuery(gbp.GbEntryKind)
	q.Order("-Date")

	b1 := new(bytes.Buffer)

	cur_start, err := memcache.Get(c, "greeting_cursor")
	if err == nil {
		str_curs := string(cur_start.Value)
		if len(cur_start.Value) > 0 {
			cursor, err := ds.DecodeCursor(str_curs) //  inverse is string()
			loghttp.E(w, r, err, false)
			if err == nil {
				b1.WriteString("found cursor from memcache -" + stringspb.Ellipsoider(str_curs, 10) + "-<br>\n")
				q = q.Start(cursor)
			}
		}
	}

	iter := q.Run(c)
	var cntr int = 0
	for {
		var g gbp.GbEntryRetr
		cntr++
		if cntr > 2 {
			b1.WriteString("  batch complete -" + string(cntr) + "-<br>\n")
			break

		}

		_, err := iter.Next(&g)
		if err == ds.Done {
			b1.WriteString("scan complete -" + string(cntr) + "-<br>\n")
			break
		}

		if fmt.Sprintf("%T", err) == fmt.Sprintf("%T", new(ds.ErrFieldMismatch)) {
			err = nil // ignore this one - it's caused by our deliberate differences between gbsaveEntry and gbEntrieRetr
		}

		if err != nil {
			b1.WriteString("error fetching next: " + err.Error() + "<br>\n")
			break
		}

		b1.WriteString("  - " + g.String())
	}

	// Get updated cursor and store it for next time.
	if cur_end, err := iter.Cursor(); err == nil {

		str_c_end := cur_end.String() //  inverse is decode()
		val := []byte(str_c_end)

		mi_save := &memcache.Item{
			Key:        "greeting_cursor",
			Value:      val,
			Expiration: 60 * time.Second,
		}

		if err := memcache.Set(c, mi_save); err != nil {
			b1.WriteString("error adding memcache item " + err.Error() + "<br>\n")
		} else {
			b1.WriteString("wrote cursor to memcache -" + stringspb.Ellipsoider(str_c_end, 10) + "-<br>\n")
		}

	} else {
		b1.WriteString("could not retrieve cursor_end " + err.Error() + "<br>\n")
	}

	w.Header().Set("Content-Type", "text/html")
	w.Write(b1.Bytes())

	w.Write([]byte("<br>----<br>"))

}
Example #24
0
func updateProfilesFromRadars(
	context appengine.Context,
	generation string,
	cursor_string string,
	chunk int) (count int, err error) {

	context.Infof("Radars Chunk %d", chunk)

	profiles := make(map[string]*Profile)

	query := datastore.NewQuery("Radar").Project("UserName")
	if cursor_string != "" {
		cursor, err := datastore.DecodeCursor(cursor_string)
		if err == nil {
			query = query.Start(cursor)
		} else {
			return count, err
		}
	}

	iterator := query.Run(context)
	count = 0
	for {
		var radar Radar
		_, err := iterator.Next(&radar)
		if err == datastore.Done {
			break
		} else if err != nil {
			context.Errorf("Radar iterator error: %v", err)
			continue
		} else {
			username := radar.UserName
			profile, found := profiles[username]
			if !found {
				profile = createProfile(username, generation)
				profiles[username] = profile
			}
			profile.RadarCount++
		}
		count = count + 1
		// we can't write more than 500 entities in a single call to PutMulti,
		// so we stop after 500 radars
		if count == 500 {
			break
		}
	}

	updateProfileEntities(context, profiles, generation, "radars", count)

	if count == 500 {
		// in case there are more radars, continue using a cursor based on the current position
		if cursor, err := iterator.Cursor(); err == nil {
			data := url.Values{}
			data.Set("generation", generation)
			data.Set("cursor", cursor.String())
			data.Set("chunk", strconv.Itoa(chunk+1))
			client := urlfetch.Client(context)
			request, _ := http.NewRequest("GET", "http://openradar-golang.appspot.com/api/updateprofiles"+"?"+data.Encode(), nil)
			response, err := client.Do(request)
			context.Infof("response %+v (%+v)", response, err)
		}
	} else {
		// if this was our last time through, start looping through comments
		data := url.Values{}
		data.Set("generation", generation)
		data.Set("source", "comments")
		client := urlfetch.Client(context)
		request, _ := http.NewRequest("GET", "http://openradar-golang.appspot.com/api/updateprofiles"+"?"+data.Encode(), nil)
		response, err := client.Do(request)
		context.Infof("response %+v (%+v)", response, err)
	}
	logMemoryUsage(context)
	return count, err
}