New RSSFeed doesn't auto update, server callback adds to feed pool, monitor callback updates feed

main.go

@@ -25,22 +25,16 @@ func main() {
 	// need to load old from file
 	allFeeds := make(map[string]*rss.Feed)
 	mon, err := monitor.New(config.MonitorPort, func(url string) {
-		var err error
-		var items []*rss.Item
 		feed, ok := allFeeds[url]
 		if !ok {
-			feed, items, err = rss.New(url, "Blue", "<img.*?/(img)?>")
-			if err != nil {
-				logger.Log("can't create new RSS %q: %v", url, err)
+			logger.Log("unknown feed triggered in monitor: %q", url)
 			return
 		}
-		} else {
-			items, err = allFeeds[url].Update()
+		items, err := allFeeds[url].Update()
 		if err != nil {
 			logger.Log("can't update old RSS %q: %v", url, err)
 			return
 		}
-		}
 		b, err := feed.Serialize()
 		if err != nil {
 			logger.Log("can't serialize to save RSS %q: %v", url, err)
@@ -71,20 +65,14 @@ func main() {
 		panic(err)
 	}
 	defer mon.Stop()
-	/*
-		go func() { // API submissions to itemsNew
-			itemsNew <- *(monitor.NewItem("https://xkcd.com/rss.xml", time.Minute))
-		}()
-		go func() {
-			for doneItem := range itemsDone {
-				if err := fetcher.FetchProcess(doneItem.URL); err != nil {
-					logger.Log(err)
-				}
-			}
-		}()
-	*/
 
-	server, err := server.New(config.Port, func(url string, interval time.Duration) {
+	server, err := server.New(config.Port, func(url string, itemFilter, contentFilter string, interval time.Duration) {
+		feed, err := rss.New(url, itemFilter, contentFilter)
+		if err != nil {
+			logger.Log("can't create new RSS %q: %v", url, err)
+			return
+		}
+		allFeeds[url] = feed
 		if err := mon.Submit(url, interval); err != nil {
 			logger.Log("Cannot accept new feed %q: %v", url, err)
 		}

rss/feed.go

@@ -35,12 +35,12 @@ func (feed *Feed) ID() string {
 	return strings.Join(regexp.MustCompile("[a-zA-Z0-9]*").FindAllString(feed.Link, -1), "_")
 }
 
-func New(source, itemFilter, contentFilter string) (*Feed, []*Item, error) {
+func New(source, itemFilter, contentFilter string) (*Feed, error) {
 	if _, err := regexp.Compile(itemFilter); err != nil {
-		return nil, nil, err
+		return nil, err
 	}
 	if _, err := regexp.Compile(contentFilter); err != nil {
-		return nil, nil, err
+		return nil, err
 	}
 	f := &Feed{
 		Items:         []string{},
@@ -48,11 +48,7 @@ func New(source, itemFilter, contentFilter string) (*Feed, []*Item, error) {
 		ContentFilter: contentFilter,
 		Link:          source,
 	}
-	items, err := f.Update()
-	if err != nil {
-		return nil, nil, err
-	}
-	return f, items, nil
+	return f, nil
 }
 
 func Deserialize(src []byte) (*Feed, error) {

rss/feed_test.go

@@ -31,10 +31,14 @@ func Test_RSSFeed(t *testing.T) {
 		},
 	}
 	for _, c := range cases {
-		feed, items, err := New(s.URL, c.itemFilter, c.contentFilter)
+		feed, err := New(s.URL, c.itemFilter, c.contentFilter)
 		if err != nil {
 			t.Errorf("couldn't create new feed %v: %v", feed, err)
 		}
+		items, err := feed.Update()
+		if err != nil {
+			t.Errorf("cannot update feed %q: %v", s.URL, err)
+		}
 		if len(items) != c.itemsOut {
 			t.Errorf("couldn't get all items from feed: got %v, wanted %v", len(items), c.itemsOut)
 		}

server/server.go

@@ -1,10 +1,13 @@
 package server
 
 import (
+	"encoding/json"
 	"net/http"
+	"net/url"
 	"os"
 	"os/signal"
 	"path"
+	"regexp"
 	"strings"
 	"syscall"
 	"time"
@@ -12,10 +15,10 @@ import (
 
 type Server struct {
 	addr           string
-	newItemHandler func(string, time.Duration)
+	newItemHandler func(string, string, string, time.Duration)
 }
 
-func New(addr string, newItemHandler func(string, time.Duration)) (*Server, error) {
+func New(addr string, newItemHandler func(string, string, string, time.Duration)) (*Server, error) {
 	return &Server{
 		addr:           addr,
 		newItemHandler: newItemHandler,
@@ -47,20 +50,28 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	case "api":
 		s.api(w, r)
 	default:
-		s.bad(w, r)
+		s.notFound(w, r)
 	}
 }
 
-func (s *Server) bad(w http.ResponseWriter, r *http.Request) {
+func (s *Server) notFound(w http.ResponseWriter, r *http.Request) {
 	http.NotFound(w, r)
 }
 
+func (s *Server) bad(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(http.StatusBadRequest)
+}
+
+func (s *Server) mybad(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(http.StatusInternalServerError)
+}
+
 func (s *Server) api(w http.ResponseWriter, r *http.Request) {
 	switch advance(r) {
 	case "feed":
 		s.feed(w, r)
 	default:
-		s.bad(w, r)
+		s.notFound(w, r)
 	}
 }
 
@@ -68,12 +79,51 @@ func (s *Server) feed(w http.ResponseWriter, r *http.Request) {
 	switch r.Method {
 	case "GET":
 	case "POST":
+		s.newItem(w, r)
 	case "PUT":
+		s.newItem(w, r)
 	default:
-		s.bad(w, r)
+		s.notFound(w, r)
 	}
 }
 
+func (s *Server) newItem(w http.ResponseWriter, r *http.Request) {
+	defer r.Body.Close()
+	newItemBody := struct {
+		URL           string `json:"url"`
+		Refresh       string `json:"refresh"`
+		ItemFilter    string `json:"items"`
+		ContentFilter string `json:"content"`
+	}{}
+	if err := json.NewDecoder(r.Body).Decode(&newItemBody); err != nil {
+		s.bad(w, r)
+		return
+	}
+	interval, err := time.ParseDuration(newItemBody.Refresh)
+	if err != nil {
+		s.bad(w, r)
+		return
+	}
+	if !validURL(newItemBody.URL) {
+		s.bad(w, r)
+		return
+	}
+	if _, err := regexp.Compile(newItemBody.ItemFilter); err != nil {
+		s.bad(w, r)
+		return
+	}
+	if _, err := regexp.Compile(newItemBody.ContentFilter); err != nil {
+		s.bad(w, r)
+		return
+	}
+	s.newItemHandler(newItemBody.URL, newItemBody.ItemFilter, newItemBody.ContentFilter, interval)
+}
+
+func validURL(loc string) bool {
+	_, err := url.ParseRequestURI(loc)
+	return err == nil
+}
+
 func advance(r *http.Request) string {
 	p := path.Clean("/" + r.URL.Path)
 	i := strings.Index(p[1:], "/") + 1

server/server_test.go

@@ -1,6 +1,7 @@
 package server
 
 import (
+	"bytes"
 	"fmt"
 	"net/http"
 	"syscall"
@@ -18,7 +19,7 @@ func Test_Server(t *testing.T) {
 
 	for _, _ = range cases {
 		var err error
-		s, err := New(testPort)
+		s, err := New(testPort, func(string, string, string, time.Duration) {})
 		if err != nil {
 			t.Errorf("failed to create server: %v", err)
 		}
@@ -33,19 +34,29 @@ func Test_Server(t *testing.T) {
 		if err := checkStatus("GET", "api/feed", http.StatusOK); err != nil {
 			t.Errorf(err.Error())
 		}
-		if err := checkStatus("POST", "api/feed", http.StatusOK); err != nil {
+		if err := checkStatus("POST", "api/feed", http.StatusBadRequest); err != nil {
 			t.Errorf(err.Error())
 		}
-		if err := checkStatus("PUT", "api/feed", http.StatusOK); err != nil {
+		if err := checkStatus("PUT", "api/feed", http.StatusBadRequest, "invalid json"); err != nil {
+			t.Errorf(err.Error())
+		}
+		if err := checkStatus("POST", "api/feed", http.StatusBadRequest, `{"url":"hello/world", "refresh":"1m"}`); err != nil {
+			t.Errorf(err.Error())
+		}
+		if err := checkStatus("PUT", "api/feed", http.StatusOK, `{"url":"localhost:1234", "refresh":"1m"}`); err != nil {
 			t.Errorf(err.Error())
 		}
 		syscall.Kill(syscall.Getpid(), syscall.SIGINT)
 	}
 }
 
-func checkStatus(method, path string, code int) error {
+func checkStatus(method, path string, code int, body ...string) error {
+	b := bytes.NewBuffer(nil)
+	if len(body) > 0 {
+		b = bytes.NewBufferString(body[0])
+	}
 	client := &http.Client{}
-	r, _ := http.NewRequest(method, "http://localhost:"+testPort+"/"+path, nil)
+	r, _ := http.NewRequest(method, "http://localhost:"+testPort+"/"+path, b)
 	resp, err := client.Do(r)
 	if err != nil {
 		return fmt.Errorf("failed to %v server: %v", method, err)