Merge pull request #547 from devlights/add-rss2-example

Author: devlights

examples/singleapp/rss2/.gitignore

@@ -0,0 +1 @@
+rss2*

examples/singleapp/rss2/Taskfile.yml

@@ -0,0 +1,21 @@
+version: '3'
+
+tasks:
+  default:
+    cmds:
+      - task: run
+  install-lib:
+    cmds:
+      - go install golang.org/x/tools/cmd/goimports@latest
+      - go install honnef.co/go/tools/cmd/staticcheck@latest
+  build:
+    deps: [ install-lib ]
+    cmds:
+      - goimports -w .
+      - go vet
+      - staticcheck
+      - go build
+  run:
+    deps: [ build ]
+    cmds:
+      - ./rss2

examples/singleapp/rss2/main.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"encoding/xml"
+	"fmt"
+	"io"
+	"net/http"
+)
+
+type (
+	Item struct {
+		XMLName xml.Name `xml:"item"`
+		Title   string   `xml:"title"`
+	}
+	Rss struct {
+		XMLName xml.Name `xml:"rss"`
+		Items   []Item   `xml:"channel>item"`
+	}
+)
+
+const (
+	URL = "https://devlights.hatenablog.com/rss"
+)
+
+func panicOnErr[T any](v T, err error) T {
+	if err != nil {
+		panic(err)
+	}
+
+	return v
+}
+
+// ブログ [いろいろ備忘録日記](https://devlights.hatenablog.com/) から RSS 2.0 を取得して表示するサンプルです。
+//
+// REFERENCES:
+//   - https://qiita.com/you8/items/e903fd463cf770688e1e
+func main() {
+	fmt.Printf("[URL] %s\n", URL)
+
+	resp := panicOnErr(http.Get(URL))
+	body := panicOnErr(io.ReadAll(resp.Body))
+	defer resp.Body.Close()
+
+	var rss Rss
+	if err := xml.Unmarshal(body, &rss); err != nil {
+		panic(err)
+	}
+
+	for i, item := range rss.Items {
+		fmt.Printf("[%2d] %s\n", i+1, item.Title)
+	}
+}