Node.js &引用；无法读取属性'；预签名到期日'；“未定义”的定义；

基本概述，我得到了一个AWS Lambda，其中运行一个Node.js应用程序，通过http调用将JSON发送到我的AWS弹性搜索数据库

所以，我从一个小错误开始：

AWS:{“Message”：“User:anonymous无权执行：es:eshttpost”}

过了一段时间，我终于明白了AWS不喜欢未签名的请求

现在，我在这一个结巴

Response:
{
  "errorMessage": "Cannot read property 'presigned-expires' of undefined",
  "errorType": "TypeError",
  "stackTrace": [
     "V4.isPresigned (/var/runtime/node_modules/aws-sdk/lib/signers/v4.js:206:32)",
     "V4.addAuthorization (/var/runtime/node_modules/aws-sdk/lib/signers/v4.js:27:14)",
     "Promise (/var/task/index.js:18:16)",
     "new Promise (<anonymous>)",
     "exports.handler (/var/task/index.js:6:12)"
   ]
}

---

您的请求可能缺少标题，请参见下文

var AWS = require('aws-sdk');
var path = require('path');

/* == Globals == */
var esDomain = {
    region: 'us-east-1',
    endpoint: 'my-domain-search-endpoint',
    index: 'myindex',
    doctype: 'mytype'
};
var endpoint = new AWS.Endpoint(esDomain.endpoint);
/*
 * The AWS credentials are picked up from the environment.
 * They belong to the IAM role assigned to the Lambda function.
 * Since the ES requests are signed using these credentials,
 * make sure to apply a policy that allows ES domain operations
 * to the role.
 */
var creds = new AWS.EnvironmentCredentials('AWS');

/*
 * Post the given document to Elasticsearch
 */
function postToES(doc, context) {
    var req = new AWS.HttpRequest(endpoint);

    req.method = 'POST';
    req.path = path.join('/', esDomain.index, esDomain.doctype);
    req.region = esDomain.region;
    req.headers['presigned-expires'] = false;
    req.headers['Host'] = endpoint.host;
    req.body = doc;

    var signer = new AWS.Signers.V4(req , 'es');  // es: service code
    signer.addAuthorization(creds, new Date());

    var send = new AWS.NodeHttpClient();
    send.handleRequest(req, null, function(httpResp) {
        var respBody = '';
        httpResp.on('data', function (chunk) {
            respBody += chunk;
        });
        httpResp.on('end', function (chunk) {
            console.log('Response: ' + respBody);
            context.succeed('Lambda added document ' + doc);
        });
    }, function(err) {
        console.log('Error: ' + err);
        context.fail('Lambda failed with error ' + err);
    });
}

我从github项目aws样本amazon elasticsearch lambda样本中提取了这个：

var AWS = require('aws-sdk');
var path = require('path');

/* == Globals == */
var esDomain = {
    region: 'us-east-1',
    endpoint: 'my-domain-search-endpoint',
    index: 'myindex',
    doctype: 'mytype'
};
var endpoint = new AWS.Endpoint(esDomain.endpoint);
/*
 * The AWS credentials are picked up from the environment.
 * They belong to the IAM role assigned to the Lambda function.
 * Since the ES requests are signed using these credentials,
 * make sure to apply a policy that allows ES domain operations
 * to the role.
 */
var creds = new AWS.EnvironmentCredentials('AWS');

/*
 * Post the given document to Elasticsearch
 */
function postToES(doc, context) {
    var req = new AWS.HttpRequest(endpoint);

    req.method = 'POST';
    req.path = path.join('/', esDomain.index, esDomain.doctype);
    req.region = esDomain.region;
    req.headers['presigned-expires'] = false;
    req.headers['Host'] = endpoint.host;
    req.body = doc;

    var signer = new AWS.Signers.V4(req , 'es');  // es: service code
    signer.addAuthorization(creds, new Date());

    var send = new AWS.NodeHttpClient();
    send.handleRequest(req, null, function(httpResp) {
        var respBody = '';
        httpResp.on('data', function (chunk) {
            respBody += chunk;
        });
        httpResp.on('end', function (chunk) {
            console.log('Response: ' + respBody);
            context.succeed('Lambda added document ' + doc);
        });
    }, function(err) {
        console.log('Error: ' + err);
        context.fail('Lambda failed with error ' + err);
    });
}