#6 - fetch feed

internal/rss/rss.go

@@ -0,0 +1,57 @@
+package rss
+
+import (
+	"context"
+	"encoding/xml"
+	"html"
+	"io"
+	"net/http"
+)
+
+type Feed struct {
+	Channel struct {
+		Title       string `xml:"title"`
+		Link        string `xml:"link"`
+		Description string `xml:"description"`
+		Item        []Item `xml:"item"`
+	} `xml:"channel"`
+}
+
+type Item struct {
+	Title       string `xml:"title"`
+	Link        string `xml:"link"`
+	Description string `xml:"description"`
+	PubDate     string `xml:"pubDate"`
+}
+
+func FetchFeed(ctx context.Context, feedURL string) (*Feed, error) {
+	req, err := http.NewRequestWithContext(ctx, "GET", feedURL, nil)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("User-Agent", "gator")
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	res, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+	var feed Feed
+	err = xml.Unmarshal(res, &feed)
+	if err != nil {
+		return nil, err
+	}
+	feed.Channel.Title = html.UnescapeString(feed.Channel.Title)
+	feed.Channel.Link = html.UnescapeString(feed.Channel.Link)
+	feed.Channel.Description = html.UnescapeString(feed.Channel.Description)
+	for i, _ := range feed.Channel.Item {
+		feed.Channel.Item[i].Link = html.UnescapeString(feed.Channel.Item[i].Link)
+		feed.Channel.Item[i].Description = html.UnescapeString(feed.Channel.Item[i].Description)
+		feed.Channel.Item[i].PubDate = html.UnescapeString(feed.Channel.Item[i].PubDate)
+		feed.Channel.Item[i].Title = html.UnescapeString(feed.Channel.Item[i].Title)
+	}
+	return &feed, nil
+}