RSS feed part4 (webserver)

main.go

package main

import (
    "encoding/xml"
    "net/http"
)

func main() {
    http.HandleFunc("/", rssHandler)
    http.ListenAndServe(":3000", nil)
}

func rssHandler(w http.ResponseWriter, r *http.Request) {
    type Item struct {
        Title       string `xml:"title"`
        Link        string `xml:"link"`
        Description string `xml:"description"`
    }

    type rss struct {
        Version     string `xml:"version,attr"`
        Description string `xml:"channel>description"`
        Link        string `xml:"channel>link"`
        Title       string `xml:"channel>title"`

        Item []Item `xml:"channel>item"`
    }

    articles := []Item{
            {"foo", "http://mywebsite.com/foo", "lorem ipsum"},
            {"foo2", "http://mywebsite.com/foo2", "lorem ipsum2"}},

    feed := &rss{
        Version:     "2.0",
        Description: "My super website",
        Link:        "http://mywebsite.com",
        Title:       "Mywebsite",
        Item: articles,
    }

    x, err := xml.MarshalIndent(feed, "", "  ")
    if err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }

    w.Header().Set("Content-Type", "application/xml")
    w.Write(x)
}

result.xml

HTTP/1.1 200 OK
Content-Type: application/xml

<rss version="2.0">
  <channel>
    <description>My super website</description>
    <link>http://mywebsite.com</link>
    <title>Mywebsite</title>
    <item>
      <title>foo</title>
      <link>http://mywebsite.com/foo</link>
      <description>lorem ipsum</description>
    </item>
    <item>
      <title>foo2</title>
      <link>http://mywebsite.com/foo2</link>
      <description>lorem ipsum2</description>
    </item>
  </channel>
</rss>