itranslate.go

package main

import (
	"json";
	"flag";
	"fmt";
	"http";
	"os";
	"io";
)

var Usage = func() {
    fmt.Fprintf(os.Stderr, "Usage of %s:\n", os.Args[0]);
    flag.PrintDefaults();
    os.Exit(1);
}

var sourceLang string;
var destLang string;
var text string;

func init() {
	flag.StringVar(&sourceLang, "s", "", "source language");
	flag.StringVar(&destLang, "d", "", "destination language");
	flag.StringVar(&text, "text", "", "text to be translated");
}

func main() {
	flag.Parse();
	
	if flag.NFlag() == 0 {
		Usage();
	}
	
	if len(sourceLang) == 0 {
		fmt.Println("You must specify the source language!");
		os.Exit(1);	
	}
	else if len(destLang) == 0 {
		fmt.Println("You must specify the destination language!");
		os.Exit(1);	
	}
	else if len(text) == 0 {
		fmt.Println("You must provide the text to be translated!");
		os.Exit(1);	
	}

	fmt.Println(fmt.Sprintf("Translating %q from %s to %s", text, sourceLang, destLang));
	
	var requestString string = fmt.Sprintf("http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q=%s&langpair=%s%%7C%s", http.URLEscape(text), sourceLang, destLang);
	
	response, _, _ := http.Get(requestString);

	if response.StatusCode == 200 {
		var array []byte;
		array, _ = io.ReadAll(response.Body);
		if array != nil {
			val, ok, _ := json.StringToJson(string(array));
			if ok {	
				var responseData json.Json = json.Walk(val, "responseData/translatedText");  
				fmt.Println(fmt.Sprintf("Result: %s", responseData.String()));
			}	
		}
	}
	else {
		fmt.Println("An error occured while calling google translator service.");
	}
}