Create URL checker object

url_checker.go

@@ -0,0 +1,48 @@
+package main
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/fatih/color"
+)
+
+type urlChecker struct {
+	client  http.Client
+	verbose bool
+}
+
+func newURLChecker(timeout time.Duration, verbose bool) urlChecker {
+	return urlChecker{http.Client{Timeout: timeout}, verbose}
+}
+
+func (c urlChecker) Check(s string) bool {
+	_, err := c.client.Get(s)
+
+	if s := color.New(color.FgCyan).SprintFunc()(s); err != nil {
+		printToStderr(
+			color.New(color.FgRed).SprintFunc()("ERROR") + "\t" + s + "\t" + err.Error())
+	} else if err == nil && c.verbose {
+		printToStderr(color.New(color.FgGreen).SprintFunc()("OK") + "\t" + s)
+	}
+
+	return err == nil
+}
+
+func (c urlChecker) CheckMany(ss []string) {
+	bs := make(chan bool, len(ss))
+
+	for _, s := range ss {
+		go func() {
+			bs <- c.Check()
+		}()
+	}
+
+	ok := true
+
+	for i := 0; i < len(ss); i++ {
+		ok = ok && <-bs
+	}
+
+	return ok
+}