Golang URL.Host方法代碼示例

//.........這裏部分代碼省略.........
				"  one of three ways, listed in decreasing order of precedence.\n"+
				"  Note: both values must be supplied using a single method:\n\n"+
				"      1. On the command line\n"+
				"      2. In the environment variables %s and %s\n"+
				"      3. In the file %s as key:secret on a single line\n\n"+
				"Options:\n",
			os.Args[0], os.Args[0],
			s3_access_key_id_variable, s3_secret_access_key_variable, s3_password_file)
		flag.PrintDefaults()
	}
	flag.Parse()

	// enforce certain option combinations
	if reset {
		refresh = true
	}
	if practice {
		watch = false
	}

	// make sure we get access keys
	if accesskeyid == "" || secretaccesskey == "" {
		accesskeyid, secretaccesskey = getKeys()
	}
	if accesskeyid == "" || secretaccesskey == "" {
		fmt.Fprintln(os.Stderr, "Error: Amazon AWS Access Key ID and/or Secret Access Key undefined\n")
		flag.Usage()
		os.Exit(-1)
	}

	// check command-line arguments
	args := flag.Args()
	if len(args) != 2 {
		flag.Usage()
		os.Exit(-1)
	}

	// figure out the direction of sync, parse the bucket and directory info
	var bucketname, bucketprefix, localdir string

	switch {
	case !strings.HasPrefix(args[0], "s3:") && strings.HasPrefix(args[1], "s3:"):
		push = true
		localdir = parseLocalDir(args[0])
		bucketname, bucketprefix = parseBucket(args[1])
	case strings.HasPrefix(args[0], "s3:") && !strings.HasPrefix(args[1], "s3:"):
		push = false
		bucketname, bucketprefix = parseBucket(args[0])
		localdir = parseLocalDir(args[1])
	default:
		flag.Usage()
		os.Exit(-1)
	}

	// make sure the root directory exists
	if info, err := os.Lstat(localdir); err != nil || !info.IsDirectory() {
		fmt.Fprintf(os.Stderr, "%s is not a valid directory\n", localdir)
	}

	// open the database
	var err os.Error
	var cache Cache
	if cache, err = Connect(path.Join(cache_location, bucketname+".sqlite")); err != nil {
		fmt.Println("Error connecting to database:", err)
		os.Exit(-1)
	}

	// create the Propolis object
	url := new(url.URL)
	url.Scheme = "http"
	if secure {
		url.Scheme = "https"
	}
	url.Host = bucketname + ".s3.amazonaws.com"
	url.Path = "/"

	p = &Propolis{
		Bucket:            bucketname,
		Url:               url,
		Secure:            secure,
		ReducedRedundancy: reduced,
		Key:               accesskeyid,
		Secret:            secretaccesskey,

		BucketRoot: bucketprefix,
		LocalRoot:  localdir,

		Refresh:     refresh,
		Paranoid:    paranoid,
		Reset:       reset,
		Directories: directories,
		Practice:    practice,
		Watch:       watch,
		Delay:       delay,
		Concurrent:  concurrent,

		Db: cache,
	}
	return
}

func getNewUrl(url *url.URL) *url.URL {
	urlBackend, _ := url.Parse("http://127.0.0.1")
	url.Scheme = urlBackend.Scheme
	url.Host = urlBackend.Host
	return url
}