A bin/go/fetchtitle.go

@@ -0,0 +1,34 @@ 
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"regexp"
+)
+
+func main() {
+    re := regexp.MustCompile(`<title>(.*?)</title>`)
+    command := os.Args[0]
+    urls := os.Args[1:]
+
+    for _, url := range urls {
+        resp, err := http.Get(url)
+        if err != nil {
+            fmt.Fprintf(os.Stderr, "%s: %v\n", command, err)
+            os.Exit(1)
+        }
+        defer resp.Body.Close()
+        b := bytes.NewBuffer([]byte{})
+        _, err = io.Copy(b, resp.Body)
+        matches := re.FindSubmatch(b.Bytes())
+        fmt.Printf("%s", matches[1])
+
+        if err != nil {
+            fmt.Fprintf(os.Stderr, "%s: reading %s: %v\n", command, url, err)
+            os.Exit(1)
+        }
+    }
+}