小编shu*_*l92的帖子

嗨,我是Sails的新手,我正在尝试通过禁用水线功能使用Sails连接到Mongoose.在执行POST操作的Sails中执行我的代码时,遇到以下问题

/Users/febinp/Documents/Tecsol/Taqua/Taqua-loginpacket/node_modules/mongoose/node_modules/mpromise/lib/promise.js:108
 if (this.ended && !this.hasRejectListeners()) throw reason;
                                                  ^
Error: Can't set headers after they are sent.
at ServerResponse.OutgoingMessage.setHeader (_http_outgoing.js:335:11)
at ServerResponse.res.setHeader (/usr/local/lib/node_modules/sails/node_modules/express/node_modules/connect/lib/patch.js:133:22)
at ServerResponse.res.set.res.header (/usr/local/lib/node_modules/sails/node_modules/express/lib/response.js:577:10)
at ServerResponse.res.send (/usr/local/lib/node_modules/sails/node_modules/express/lib/response.js:142:12)
at ServerResponse.res.json (/usr/local/lib/node_modules/sails/node_modules/express/lib/response.js:223:15)
at EventEmitter.<anonymous> (/Users/febinp/Documents/Tecsol/Taqua/Taqua-loginpacket/api/controllers/Status-packetController.js:74:17)
at EventEmitter.<anonymous> (/Users/febinp/Documents/Tecsol/Taqua/Taqua-loginpacket/node_modules/mongoose/node_modules/mpromise/lib/promise.js:175:45)
at EventEmitter.emit (events.js:110:17)
at Promise.safeEmit (/Users/febinp/Documents/Tecsol/Taqua/Taqua-loginpacket/node_modules/mongoose/node_modules/mpromise/lib/promise.js:81:21)
at Promise.fulfill (/Users/febinp/Documents/Tecsol/Taqua/Taqua-loginpacket/node_modules/mongoose/node_modules/mpromise/lib/promise.js:94:24)
at Promise.resolve (/Users/febinp/Documents/Tecsol/Taqua/Taqua-loginpacket/node_modules/mongoose/lib/promise.js:113:23)
at model.<anonymous> (/Users/febinp/Documents/Tecsol/Taqua/Taqua-loginpacket/node_modules/mongoose/lib/document.js:1578:39)
at next_ (/Users/febinp/Documents/Tecsol/Taqua/Taqua-loginpacket/node_modules/mongoose/node_modules/hooks-fixed/hooks.js:89:34)
at EventEmitter.fnWrapper (/Users/febinp/Documents/Tecsol/Taqua/Taqua-loginpacket/node_modules/mongoose/node_modules/hooks-fixed/hooks.js:171:15)
at EventEmitter.<anonymous> (/Users/febinp/Documents/Tecsol/Taqua/Taqua-loginpacket/node_modules/mongoose/node_modules/mpromise/lib/promise.js:175:45)
at EventEmitter.emit (events.js:110:17)
at Promise.safeEmit (/Users/febinp/Documents/Tecsol/Taqua/Taqua-loginpacket/node_modules/mongoose/node_modules/mpromise/lib/promise.js:81:21)
at Promise.fulfill (/Users/febinp/Documents/Tecsol/Taqua/Taqua-loginpacket/node_modules/mongoose/node_modules/mpromise/lib/promise.js:94:24)
at p1.then.then.self.isNew (/Users/febinp/Documents/Tecsol/Taqua/Taqua-loginpacket/node_modules/mongoose/lib/model.js:254:27)
at newTickHandler (/Users/febinp/Documents/Tecsol/Taqua/Taqua-loginpacket/node_modules/mongoose/node_modules/mpromise/lib/promise.js:229:18)
at process._tickDomainCallback (node.js:381:11) …

我想将AWS S3与AWS Lambda连接.我创建了我的s3桶并将其命名xyz.在我的AWS Lambda函数上创建事件源时,它显示以下错误

There was an error creating the event source mapping: Your bucket must be in the same region as the function.

在浏览此链接时,我发现我需要为AWS Lambda函数设置s3存储桶的事件通知.但是我无法为s3存储桶设置事件通知,因为它没有在s3存储桶属性的事件选项卡中显示AWS lambda函数的设置.

我为Lambda创建的IAM角色的策略文档如下

{
"Version": "VersionNumber",
"Statement": [
    {
        "Effect": "Allow",
        "Action": [
            "logs:CreateLogGroup",
            "logs:CreateLogStream",
            "logs:PutLogEvents"
        ],
        "Resource": "arn:aws:logs:*:*:*"
    },
    {
        "Effect": "Allow",
        "Action": [
            "s3:GetObject",
            "s3:PutObject"
        ],
        "Resource": [
            "arn:aws:s3:::xyz/*"
        ]
    }
   ]
 }

有人可以告诉我为什么我无法为s3存储桶上的操作创建AWS Lambda事件吗？

目前，我正在一个项目中，要求后端在中完成oracle。我使用给定的链接，并在Mac上使用npm 安装了node-oracledb。我的文件内容如下

var oracledb = require('oracledb');

oracledb.getConnection(
{
user          : 'username',
password      : 'password',
connectString : 'username/password//hostname:port/sid'
function(err, connection)
{
if (err) {
  console.error(err.message);
  return;
}else{
    connection.execute(
  "SELECT * from TableName",
  function(err, result)
  {
    if (err) { console.error(err); return; }
    console.log(result.rows);
  });
 }
});

当我运行节点filename.js时，出现以下错误

ORA-12154: TNS:could not resolve the connect identifier specified

我正在使用的节点版本是，v7.0.0而npm版本是v3.10.8。我的oracle数据库也是11g云上的一个实例。有人可以让我知道我在做什么错吗？

我是Elixir 的新手。我的任务是检查给定的文件string是否为ip address or a number. 我发现inet有这个parse_address检查给定的字符串是否是一个 IP 地址并提供适当的响应。

我在iex终端上的代码如下

inet :parse_address("192.168.42.2")

当我在终端上运行上述代码时，出现以下错误

 iex(1)> inet :parse_address("192.168.42.2").
 ** (SyntaxError) iex:1: syntax error before: '('

有人可以帮我解决这个问题吗？