Add ability to read the words under Mac OS

main.go

@@ -2,15 +2,29 @@ package main
 
 import (
 	"fmt"
+	"io"
 	"os"
+	"os/exec"
+	"strconv"
 
+	"time"
+
+	"net/http"
+	"net/url"
+
+	log "github.com/Sirupsen/logrus"
 	"github.com/urfave/cli"
 )
 
+const (
+	Mp3FileName = "say-it.mp3"
+)
+
 var (
 	person int
 	speed  int
 	pitch  int
+	token  string = "24.85efc4bbd8b8315255dcb59cd82e1ac4.2592000.1501048297.282335-9739014"
 )
 
 func main() {
@@ -26,8 +40,7 @@ func main() {
 			return nil
 		}
 		words := c.Args().Get(0)
-		fmt.Println(words)
-
+		fetchVoiceAndSpeak(words)
 		fmt.Println(person, speed, pitch)
 		return nil
 	}
@@ -57,3 +70,47 @@ func setFlags(app *cli.App) {
 		},
 	}
 }
+
+func fetchVoiceAndSpeak(text string) {
+	urlObject := buildURL(text)
+	response, err := http.Get(urlObject.String())
+
+	if err != nil {
+		log.Error("Fetch voice failed:" + err.Error())
+	}
+	// fmt.Println(response.StatusCode)
+
+	defer response.Body.Close()
+	out, err := os.Create(Mp3FileName)
+	if err != nil {
+		log.Fatal("Create file failed:" + err.Error())
+	}
+	defer out.Close()
+	io.Copy(out, response.Body)
+
+	speak()
+}
+
+func speak() {
+	command := exec.Command("afplay", Mp3FileName)
+	if err := command.Run(); err != nil {
+		log.Error("Failed to say the words: " + err.Error())
+	}
+}
+
+func buildURL(text string) *url.URL {
+	baseURL := "http://tsn.baidu.com/text2audio"
+	urlObject, _ := url.Parse(baseURL)
+
+	queries := url.Values{}
+	queries.Add("tex", text)
+	queries.Add("lan", "zh")
+	queries.Add("cuid", strconv.FormatInt(time.Now().Unix(), 10))
+	queries.Add("ctp", "1")
+	queries.Add("tok", token)
+	queries.Add("per", strconv.Itoa(person))
+	queries.Add("spd", strconv.Itoa(speed))
+	queries.Add("pit", strconv.Itoa(pitch))
+	urlObject.RawQuery = queries.Encode()
+	return urlObject
+}