在AWS-Lambda中运行node.js代码时发生错误

Question

在AWS-Lambda中运行代码时出现以下错误。

TypeError: first argument must be a string or Buffer at ClientRequest.OutgoingMessage.write (_http_outgoing.js:447:11) at EventEmitter. (/var/task/index.js:52:13) at emitOne (events.js:77:13) at EventEmitter.emit (events.js:169:7) at exports.handler.eventEmitter.on.offset (/var/task/index.js:57:18)

'use strict'; 
let https = require('https'); 
exports.handler = (event, context, callback) => { 
    var ratesData =[]; 
    var totalRecords =0; 
    var events = require('events'); 
    var options = { 
     hostname: 'encrypted.google.com', 
     port: 443, 
     path: '/', 
     method: 'GET' 
    }; 
    // Create an eventEmitter object 
    var eventEmitter = new events.EventEmitter(); 
    eventEmitter.on('getJson', function(offset) 
    {  
     const req = https.request(options.toString(), (res) => { 
      let body = ''; 
      console.log('Status:', res.statusCode); 
      console.log('Headers:', JSON.stringify(res.headers)); 
      res.setEncoding('utf8'); 
      res.on('data', (chunk) => body += chunk); 
      res.on('end',() => { 
       console.log('Successfully processed HTTPS response'); 
       // If we know it's JSON, parse it 
       if (res.headers['content-type'] === 'application/json')  
       { 
        var requestedJson = JSON.parse(body); 
        body = requestedJson.records; 

        totalRecords = requestedJson.total_records; 
        body.forEach(function(record) 
        { 
         ratesData.push(record); 
        }); 
       } 

       callback(null, body); 
      }); 
     }); 
     req.on('error', callback); 
     req.write(JSON.stringify(event.data)); 
     req.end(); 
    }); 
    console.log('in calling'); 
    // Bind the connection event with the handler 
    eventEmitter.emit('getJson',0); 
    for(var i=1;i < (totalRecords/100)+1;i++) 
    { 
     eventEmitter.emit('getJson',i); 
    } 
    console.log(ratesData); 

}; 

Answer 1

对于一个你有toString()对你的选择对象。删除。

我还建议在本地进行测试，因为它更容易调试。

// filename: test.js - run as node test.js 

// Require your lambda 
require('./index.js'); 

// Dummy context 
var context = { }; 

// The event object - make sure of its format. S3 buckets pass a Records array for example 
var e = { }; 

// Call the Lambda function 
lambda.handler(e, context, function(err, result) { 
    console.log('------------'); 
    console.log('Context done'); 
    console.log(' error:', err); 
    console.log(' result:', result); 
    });