DartVM服务器开发（第二天）--处理请求

  //....
  //监听请求
  await for(HttpRequest request in requestServer){

    //监听到请求后response回复它一个Hello World!然后关闭这个请求
//    request.response..write('Hello World!')
//      ..close();
    handleMessage(request);
  }
}
void handleMessage(HttpRequest request){
//在这个方法里面处理请求
}

//....
void handleMessage(HttpRequest request){
  try{
    //在这里处理请求
  }catch(e){
    print('出现了一个异常，异常为：$e');
  }
  print('请求被处理了');
}

void handleMessage(HttpRequest request){
  try{
    if(request.method=='GET'){
      //获取到GET请求
      handleGET(request);
    }else if(request.method=='POST'){
      //获取到POST请求
      handlePOST(request);
    }else{
      //其它的请求方法暂时不支持，回复它一个状态
      request.response..statusCode=HttpStatus.methodNotAllowed
          ..write('对不起，不支持${request.method}方法的请求！')
          ..close();
    }
  }catch(e){
    print('出现了一个异常，异常为：$e');
  }
  print('请求被处理了');
}

void handleGET(HttpRequest request){
  //处理GET请求
}
void handlePOST(HttpRequest request){
  //处理POST请求
}

abstract class HttpStatus {
//继续
  static const int continue_ = 100;
//交换协议
  static const int switchingProtocols = 101;
//可以
  static const int ok = 200;
//已创建
  static const int created = 201;
//认可的
  static const int accepted = 202;
//非授权信息
  static const int nonAuthoritativeInformation = 203;
//没有内容
  static const int noContent = 204;
//重置内容
  static const int resetContent = 205;
//部分内容
  static const int partialContent = 206;
//多项选择
  static const int multipleChoices = 300;
//永久迁移
  static const int movedPermanently = 301;
//已发现
  static const int found = 302;
//临时迁移
  static const int movedTemporarily = 302; // Common alias for found.
//查看其它
  static const int seeOther = 303;
//未修改的
  static const int notModified = 304;
//使用代理
  static const int useProxy = 305;
//暂时重定向
  static const int temporaryRedirect = 307;
//请求失败
  static const int badRequest = 400;
//没有授权
  static const int unauthorized = 401;
//要求付款
  static const int paymentRequired = 402;
//被禁止
  static const int forbidden = 403;
//未找到
  static const int notFound = 404;
//请求方法不允许
  static const int methodNotAllowed = 405;
//不接受
  static const int notAcceptable = 406;
//需要代理身份认证
  static const int proxyAuthenticationRequired = 407;
//请求超时
  static const int requestTimeout = 408;
//冲突
  static const int conflict = 409;
//过去了
  static const int gone = 410;
//长度要求
  static const int lengthRequired = 411;
//先决条件失败
  static const int preconditionFailed = 412;
//请求实体过大
  static const int requestEntityTooLarge = 413;
//请求地址过长
  static const int requestUriTooLong = 414;
//非支持的媒体类型
  static const int unsupportedMediaType = 415;
//请求范围不可满足
  static const int requestedRangeNotSatisfiable = 416;
//期望失败
  static const int expectationFailed = 417;
//升级要求
  static const int upgradeRequired = 426;
//内部服务器错误
  static const int internalServerError = 500;
//未实现
  static const int notImplemented = 501;
//网关坏了
  static const int badGateway = 502;
//服务不可用
  static const int serviceUnavailable = 503;
//网关超时
  static const int gatewayTimeout = 504;
//http版本不支持
  static const int httpVersionNotSupported = 505;
// 连接超时
  static const int networkConnectTimeoutError = 599;
}

void handleGET(HttpRequest request){
  //获取一个参数
  var id=request.uri.queryParameters['id'];//查询id的值
  request.response
  ..statusCode=HttpStatus.ok//回复它一个ok状态，说明我收到请求啦
  ..write('当前查询的id为$id')//显示到浏览器的内容
  ..close();//我已经回复你了，所以关闭这个请求
}

  request.headers.forEach((key,values){
    print('key:$key');
    for(String value in values){
      print('value:$value');
    }
  });