func (fc *feedCommand) test(c *kingpin.ParseContext) error {
fc.init()
url := fc.FeedURL
resp, err := crawler.GetFeed(url, nil)
if err != nil {
return err
}
body, err := ioutil.ReadAll(resp.Body)
resp.Body.Close()
if err != nil {
return err
}
feed, stories, err := feed.ParseFeed(url, body)
if err != nil {
return err
}
fmt.Printf("Found %d items in feed:\n", len(stories))
fmt.Printf(" Url: %s\n", feed.URL)
fmt.Printf(" Title: %s\n", feed.Title)
fmt.Printf(" Updated: %s\n", feed.Updated)
fmt.Printf(" NextUpdate: %s\n", feed.NextUpdate)
fmt.Printf(" Url: %s\n", feed.Link)
for i, s := range stories {
fmt.Printf("%d) %s\n", i, s.Title)
fmt.Printf(" Published %s\n", s.Published)
fmt.Printf(" Updated %s\n", s.Updated)
fmt.Println()
fmt.Printf("%s\n", s.Content)
fmt.Println()
fmt.Printf("Mail Message for %s:\n", s.Title)
fmt.Println()
m := mail.CreateMailFromItem("From@Address", netmail.Address{Address: "To@Address"}, s)
fmt.Println("****** Mail Message *******")
b := bytes.NewBuffer([]byte{})
m.WriteTo(b)
spew.Dump(b)
fmt.Println("****** ++++++++++++ *******")
}
return nil
}
func TestFeedWatcherWithGuidsSet(t *testing.T) {
t.Parallel()
n, feedResp, _ := SetupTest(t, "../testdata/ars.rss")
OverrideAfter(n)
_, stories, _ := feed.ParseFeed(n.FeedInfo.URL, feedResp)
guids := make(map[string]bool, 25)
for _, i := range stories {
guids[i.ID] = true
}
n.GUIDCache = guids
go n.PollFeed()
req := <-n.crawlChan
req.ResponseChan <- &FeedCrawlResponse{
URI: n.FeedInfo.URL,
Body: feedResp,
Error: nil,
HTTPResponseStatus: "200 OK",
HTTPResponseStatusCode: 200,
}
resp := <-n.responseChan
if len(resp.Items) != 0 {
t.Fatalf("Expected 0 items from the feed but got %d.", len(resp.Items))
}
// Second poll with an new items.
n.GUIDCache = map[string]bool{}
req = <-n.crawlChan
req.ResponseChan <- &FeedCrawlResponse{
URI: n.FeedInfo.URL,
Body: feedResp,
Error: nil,
HTTPResponseStatus: "200 OK",
HTTPResponseStatusCode: 200,
}
resp = <-n.responseChan
if len(resp.Items) != 25 {
t.Fatalf("Expected 25 items from the feed but got %d.", len(resp.Items))
}
}
// Core logic to poll a feed, find new items, add those to the database, and
// send them for mail.
//
// Populates fields:
// - Feed with information extracted from the feed
// - Items with the items in the feed
// - Error any errors encountered in parsing or handling the feed
func (fw *FeedWatcher) updateFeed(resp *FeedCrawlResponse) error {
feed, stories, err := feed.ParseFeed(resp.URI, resp.Body)
if feed == nil || stories == nil || len(stories) == 0 {
if err != nil {
resp.Error = fmt.Errorf("Error parsing response from %s: %#v", resp.URI, err)
fw.Logger.Error(resp.Error)
} else {
resp.Error = fmt.Errorf("no items found in %s", resp.URI)
fw.Logger.Info(resp.Error)
}
return resp.Error
}
resp.Feed = feed
/*
* Load most recent X * guidSaveRatio Guids from Db
* Filter New Stories
* Send New Stories for mailing
* Add sent guid to list
* prune Guids back to X * guidSaveRatio
*/
// If we don't know about any GUIDs for this feed we haven't been
// initalized yet. Check the GUIDs in the feed we just read and see if
// they exist in the DB. That should be the maximum we should need to
// load into memory.
guidsToLoad := int(math.Ceil(float64(len(stories)) * guidCacheSize))
fw.Logger.Infof("Got %d stories from feed %s.", len(stories), fw.FeedInfo.URL)
// On first pass or no stories ever seen
if len(fw.GUIDCache) == 0 {
var err error
fw.GUIDCache, err = fw.LoadGuidsFromDb(guidsToLoad)
if err != nil {
resp.Error = fmt.Errorf("error getting Guids from DB: %s", err)
return resp.Error
}
fw.Logger.Infof("Loaded %d known guids for Feed %s.", len(fw.GUIDCache), fw.FeedInfo.URL)
}
resp.Items = fw.filterNewItems(stories)
fw.Logger.Infof("Feed %s has %d new items", feed.Title, len(resp.Items))
handledItems := 0
for _, item := range resp.Items {
item.Title = fmt.Sprintf("%s: %s", fw.FeedInfo.Name, item.Title)
fw.Logger.Infof("New Story: %s, sending for mail.", item.Title)
err := fw.sendMail(item)
if err != nil {
fw.Logger.Infof("Error sending mail: '%s'. Skipping %d remaining items", err.Error(), len(resp.Items)-handledItems)
resp.Error = &ErrMailDeliveryFailed{err.Error()}
// An error with the mailer usually means we should just stop trying for
// a bit. So skip the rest of the items.
break
} else {
err := fw.recordGUID(item.ID)
if err != nil {
e := fmt.Errorf("error writing guid to db: %s", err)
resp.Error = e
fw.Logger.Info(e)
} else {
fw.Logger.Infof("Added guid %s for feed %s", item.ID, fw.FeedInfo.URL)
}
}
handledItems++
}
// Reload GUIDs to X * guidSaveRatio but only if there were new
// items otherwise it would be noop.
if len(resp.Items) > 0 {
fw.GUIDCache, err = fw.LoadGuidsFromDb(guidsToLoad)
if err != nil {
e := fmt.Errorf("error getting Guids from DB: %s", err)
fw.Logger.Info(e)
resp.Error = e
}
}
return resp.Error
}