: start
: start {|http| .... }
    TCP ͥĥꡢHTTP å򳫻Ϥޤ
    Ǥ˥å󤬳ϤƤ㳰 IOError ȯޤ

    ƥ졼ȤƸƤФ줿ϥ֥åδ֤å³
    ֥åλȤȤ˼ưŪ˥åĤޤ

