aws-lambda

#aws-

lambda

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1: aws-lambda 2

2

2

Lambda 2

Examples 2

2

Java AWS-Lambda S3 7

2: Alexa-KIT 9

Examples 9

Alexa 9

3: AWS LambdaPython 11

Examples 11

AWS Lambda 11

Hello World - Lambda 11

4: AWS LambdaS3 22

Examples 22

JavaEchoArgs 22

5: aws-lambdaC 23

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23

23

Examples 23

1.Visual Studio 23

2. 25

3 - LambdaAWS 27

4.Visual StudioAWS Lambda 28

6: S3AWS Lambda 30

30

Examples 30

cheatsheet 30

javascriptAWS-SDK 30

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S3 30

Elasticache Redis 30

7: 32

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Examples 32

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CRUD 32

8: S3aws-lambda 39

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Examples 39

S3 PUT 39

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1: aws-lambda

AWS Lambda。Amazon Web Services。Lambda。。

AWS LambdaNode.jsJavaScriptPythonJavaJava 8C.NET Core。。

HTTP

•AWSAmazon API GatewayREST•

Lambda○

○

○

○

•

••

Web•AWS•

Examples

AWS“ ”“ Lambda ”。1.

Lambda 。 2.

。LambdaLambda。 3.

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“”Lambda。APIRESTAlexa。 4.

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.zipAmazon S3 AWS。 5.

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。Lambda。 6.

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Java AWS-Lambda S3

AWS-Lambda。/lambda。

Lambda

lambda。maven

<dependencies> <dependency> <groupId>com.amazonaws</groupId> <artifactId>aws-lambda-java-core</artifactId> <version>1.1.0</version> <type>jar</type> </dependency> <dependency>

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<groupId>com.amazonaws</groupId> <artifactId>aws-lambda-java-events</artifactId> <version>1.3.0</version> <type>jar</type> </dependency> </dependencies>

HelloWorld

package com; import com.amazonaws.services.lambda.runtime.Context; import com.amazonaws.services.lambda.runtime.RequestHandler; import com.amazonaws.services.lambda.runtime.events.S3Event; import com.amazonaws.services.s3.event.S3EventNotification; public class HelloWorld implements RequestHandler< S3Event, String> { @Override public String handleRequest(S3Event event, Context ctx) { S3EventNotification.S3EventNotificationRecord record=event.getRecords().get(0); System.out.println("Bucket Name is "+record.getS3().getBucket().getName()); System.out.println("File Path is "+record.getS3().getObject().getKey()); return null; } }

mvn。

AWS-Lambda。Lambda“lambda”。Java。

“”。lambdaJava。

“”“.ZIP”.zip。

Handler。RequestHandler。lambdaLambda。“com.HelloWorld”

S3Lambda

S3

S3“”。•

“”“”。•

。“”Lambda。“ObjectCreatedAll”lambdabucket•

“Sends to”Lambdalambda。•

Lambda

lambda。lambda“CloudWatch”“Logs”Lambda。“Log Streams”。lambda。

aws-lambda https://riptutorial.com/zh-CN/aws-lambda/topic/2357/aws-lambda

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2: Alexa-KIT

Examples

Alexa

AWSAWS Lambda。 。

node.jspython

alexa。。

。。

Configure functionlambda。

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。

。

alexa。

。

Alexa-KIT https://riptutorial.com/zh-CN/aws-lambda/topic/7698/alexa-kit

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3: AWS LambdaPython

Examples

AWS Lambda

AWS Lambda

••

AWS••

RESTful•AWS APIRESTful•

Hello World - Lambda

lambda。Hello World。 。

AWS1. Lambda2. “Lambda” 3.

4.

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configure5.

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API6. 。 7.

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API NameAPI 。 LambdaURL。http。GET。AWSstagingproddev...proddev。Open。API NameAPI 。 LambdaURL。http。GET。AWSstagingproddev...proddev。Open。

8.

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。python。。

cloudtrailaws lambda。。

9.

Lambda10.

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lambda_function。lambda。。11.

。aws

12.

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lambda。

AWS LambdaPython https://riptutorial.com/zh-CN/aws-lambda/topic/6698/aws-lambdapython

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4: AWS LambdaS3

Examples

JavaEchoArgs

。Java

public String handleRequest(String input, Context context) { context.getLogger().log("Input: " + input); String output = "Input:" + System.getProperty("line.separator") + input; return output; }

AWS LambdaS3 https://riptutorial.com/zh-CN/aws-lambda/topic/6216/aws-lambdas3

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5: aws-lambdaC

AWSAWS LambdaC。Visual Studio 2015CAWS Lambda。

“”。

20171。Windows 10 Home。

Visual Studio 201531. Visual Studio 2015AWS Toolkit - 1.11.2.02. Microsoft .NET2 - 14.1.21111.03.

。

。

WindowsWindows。

Examples

1.Visual Studio

Visual Studio - >1. AWS Lambda.NET Core 2.

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“ ”。Empty FunctionFinish 3.

- > NuGet - >。4. Install-Package Amazon.Lambda.Core5. “”。。6.

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2.

Function.cs

public class Function { /// <summary> /// A simple function that takes a birth date and returns Age in years /// </summary> /// <param name="input"></param> /// <returns>Age is years</returns> /// [LambdaSerializer(typeof(SimpleSerializer))] public string FunctionHandler(Dictionary<string, int> input) { var defaultMessage = "Age could not be determined."; var birthDate = new DateTime(input["year"], input["month"], input["day"]); var ageInYears = DateTime.Today.Year - birthDate.Year; if (birthDate.DayOfYear > DateTime.Today.DayOfYear) ageInYears--; defaultMessage = $"Age in years: {ageInYears}"; return defaultMessage; } }

1.

using System.Collections.Generic; using Amazon.Lambda.Core;

SimpleSerializer.cs2. 3.

using System;

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using System.IO; using Amazon.Lambda.Core; using Newtonsoft.Json; namespace AWSLambdaFunctionAgeInYears { public class SimpleSerializer : ILambdaSerializer { public T Deserialize<T>(Stream requestStream) { string text; using (var reader = new StreamReader(requestStream)) text = reader.ReadToEnd(); try { return JsonConvert.DeserializeObject<T>(text); } catch (Exception ex) { if (typeof(T) == typeof(System.String)) return (T)Convert.ChangeType(text, typeof(T)); throw ex; } } public void Serialize<T>(T response, Stream responseStream) { StreamWriter streamWriter = new StreamWriter(responseStream); try { string text = JsonConvert.SerializeObject(response); streamWriter.Write(text); streamWriter.Flush(); } catch (Exception ex) { if (typeof(T) == typeof(System.String)) { streamWriter.Write(response); streamWriter.Flush(); return; } throw ex; } } } }

Test ProjectFunctionTest.cs23

var upperCase = function.FunctionHandler(null);

4.

- 。5.

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3 - LambdaAWS

AWS Lambda ...1.

“AWS Lambda”。。。AWSLambdaFunctionAgeInYears“”。 2.

Role NameAWSLambdaRole。。 3.

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4.Visual StudioAWS Lambda

3Visual StudioView Function。1. Sample Inputjson2.

{ "month": "10", "day": "28", "year": "1979" }

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“ ”。AWS。3.

aws-lambdaC https://riptutorial.com/zh-CN/aws-lambda/topic/8937/aws-lambda-c--

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6: S3AWS Lambda

LambdaAWS。S3。lambdaAWS-SDKLambdaS3S3Lambda

Examples

cheatsheet

javascriptAWS-SDK

Lambdaaws-sdk https://aws.amazon.com/sdk-for-node-js/ zip。

const AWS = require('aws-sdk');

module.exports.myFunction = (event, context, callback) => { const response = { statusCode: 200, body: 'Hello Lambda!', }; return callback(null, response); };

S3

const s3 = new AWS.S3;

Elasticache Redis

//make sure redis node-module is added in zip const redis = require('redis'); //the redis information should be stored in the environment, not hard coded const redis_options = { host: process.env.REDIS_HOST, port: process.env.REDIS_PORT }; module.exports.myFunction = (event, context, callback) => { try { let client = redis.createClient(redis_options); context.callbackWaitsForEmptyEventLoop = false; client.on('connect', () => { console.log('Connected:', client.connected); }); client.on('end', () => { console.log('Connection closed.'); });

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client.on('ready', function () { console.log('Connection ready.'); client.keys('*', (err, keys) => { //always quit the redis client when no longer needed //else the connection will be used up client.quit(); const response = { statusCode: 200, body: keys, }; return callback(null, response); }); } catch (err) { if (client) { client.quit();} console.log('Error!: ' + err.message); callback(err); } };

S3AWS Lambda https://riptutorial.com/zh-CN/aws-lambda/topic/9286/s3aws-lambda

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7:

AWS Lambda。。

“” https //serverless.com/

Examples

npm install serverless -g

Node.jsAWS Lamdba

serverless create --template aws-nodejs

handler.js

'use strict'; // Your first function handler module.exports.hello = (event, context, cb) => cb(null, { message: 'Go Serverless v1.0! Your function executed successfully!', event } ); // You can add more handlers here, and reference them in serverless.yml

AWS

serverless deploy

CRUD

CRUD

npm install serverless -g

Lambda

serverless create --template aws-nodejs --path myService

myService

serverless.yml1. handler.js2. event.json3.

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serverless.yml CRUD。

serverless.yml

service: serverless-crud provider: name: aws runtime: nodejs4.3 region: us-east-1 stage: dev iamRoleStatements: - Effect: Allow Action: - dynamodb:DescribeTable - dynamodb:Query - dynamodb:Scan - dynamodb:GetItem - dynamodb:PutItem - dynamodb:UpdateItem - dynamodb:DeleteItem Resource: "arn:aws:dynamodb:us-east-1:*:*" functions: create: handler: handler.create events: - http: path: todos method: post cors: true readAll: handler: handler.readAll events: - http: path: todos method: get cors: true readOne: handler: handler.readOne events: - http: path: todos/{id} method: get cors: true update: handler: handler.update events: - http: path: todos/{id} method: put cors: true delete: handler: handler.delete events: - http: path: todos/{id} method: delete cors: true

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resources: Resources: TodosDynamoDbTable: Type: 'AWS::DynamoDB::Table' DeletionPolicy: Retain Properties: AttributeDefinitions: - AttributeName: id AttributeType: S KeySchema: - AttributeName: id KeyType: HASH ProvisionedThroughput: ReadCapacityUnits: 1 WriteCapacityUnits: 1 TableName: 'todos'

Lambda1. Lambda2. Dynamodb3. HTTPAPI4.

handler.jslambdanode.js。

'use strict'; const todosCreate = require('./todos-create.js'); const todosReadAll = require('./todos-read-all.js'); const todosReadOne = require('./todos-read-one.js'); const todosUpdate = require('./todos-update.js'); const todosDelete = require('./todos-delete.js'); module.exports.create = (event, context, callback) => { todosCreate(event, (error, result) => { const response = { statusCode: 200, headers: { "Access-Control-Allow-Origin" : "*" }, body: JSON.stringify(result), }; context.succeed(response); }); }; module.exports.readAll = (event, context, callback) => { todosReadAll(event, (error, result) => { const response = { statusCode: 200, headers: { "Access-Control-Allow-Origin" : "*" }, body: JSON.stringify(result),

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}; context.succeed(response); }); }; module.exports.readOne = (event, context, callback) => { todosReadOne(event, (error, result) => { const response = { statusCode: 200, headers: { "Access-Control-Allow-Origin" : "*" }, body: JSON.stringify(result), }; context.succeed(response); }); }; module.exports.update = (event, context, callback) => { todosUpdate(event, (error, result) => { const response = { statusCode: 200, headers: { "Access-Control-Allow-Origin" : "*" }, body: JSON.stringify(result), }; context.succeed(response); }); }; module.exports.delete = (event, context, callback) => { todosDelete(event, (error, result) => { const response = { statusCode: 200, headers: { "Access-Control-Allow-Origin" : "*" }, body: JSON.stringify(result), }; context.succeed(response); }); };

CRUD

create.js1. -all.js2. - one.js3. update.js4. delete.js5.

。

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todos-create.js

'use strict'; const AWS = require('aws-sdk'); const dynamoDb = new AWS.DynamoDB.DocumentClient(); const uuid = require('uuid'); module.exports = (event, callback) => { const data = JSON.parse(event.body); data.id = uuid.v1(); data.updatedAt = new Date().getTime(); const params = { TableName: 'todos', Item: data }; return dynamoDb.put(params, (error, data) => { if (error) { callback(error); } callback(error, params.Item); }); };

todos-read-all.js

'use strict'; const AWS = require('aws-sdk'); const dynamoDb = new AWS.DynamoDB.DocumentClient(); module.exports = (event, callback) => { const params = { TableName: 'todos', }; return dynamoDb.scan(params, (error, data) => { if (error) { callback(error); } callback(error, data.Items); }); }; For todos-read-one.js <br> 'use strict'; const AWS = require('aws-sdk'); const dynamoDb = new AWS.DynamoDB.DocumentClient(); module.exports = (event, callback) => { const params = { TableName: 'todos', Key: {

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id: event.pathParameters.id } }; return dynamoDb.get(params, (error, data) => { if (error) { callback(error); } callback(error, data.Item); }); };

todos-update.js

'use strict'; const AWS = require('aws-sdk'); const dynamoDb = new AWS.DynamoDB.DocumentClient(); module.exports = (event, callback) => { const data = JSON.parse(event.body); data.id = event.pathParameters.id; data.updatedAt = new Date().getTime(); const params = { TableName : 'todos', Item: data }; return dynamoDb.put(params, (error, data) => { if (error) { callback(error); } callback(error, params.Item); }); };

todos-delete.js

'use strict'; const AWS = require('aws-sdk'); const dynamoDb = new AWS.DynamoDB.DocumentClient(); module.exports = (event, callback) => { const params = { TableName : 'todos', Key: { id: event.pathParameters.id } }; return dynamoDb.delete(params, (error, data) => { if (error) { callback(error); } callback(error, params.Key); });

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};

npm

npm init npm1. npm install aws-sdk --save install aws-sdk2. npm install uuid --save3.

cd myService

serverless deploy

api。

curl -X POST https://XXXX.execute-api.region.amazonaws.com/dev/todos --data '{ "body" : "Learn Serverless" }'

curl https://XXXX.execute-api.region.amazonaws.com/dev/todos

curl https://XXXX.execute-api.region.amazonaws.com/dev/todos/<id>

curl -X PUT https://XXXX.execute-api.region.amazonaws.com/dev/todos/<id> --data '{ "body" : "Understand Serverless" }'

`curl -X DELETE https://XXXX.execute-api.region.amazonaws.com/dev/todos/<id`>

https://riptutorial.com/zh-CN/aws-lambda/topic/6719/

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8: S3aws-lambdaJSON•“”•

•

Records - > [] - > s3 - > bucket - > name S3

Records - > [] - > s3 - > object - > key 。

S3JSON Schema $.Records[0].s3.object.key 。s3://mybucket/path/file.txtpath/file.txt

PythonUTF-8 URL。ascii。URLUTF-8 - LambdaS3ASCII

"Records";Lambda。

“” - >“”Lambda。PUT。

AWS Lambda。

Examples

S3 PUT

{ "Records": [ { "eventVersion": "2.0", "eventTime": "1970-01-01T00:00:00.000Z", "requestParameters": { "sourceIPAddress": "127.0.0.1" }, "s3": { "configurationId": "testConfigRule", "object": { "eTag": "0123456789abcdef0123456789abcdef", "sequencer": "0A1B2C3D4E5F678901", "key": "HappyFace.jpg", "size": 1024 }, "bucket": { "arn": "arn:aws:s3:::mybucket", "name": "sourcebucket", "ownerIdentity": { "principalId": "EXAMPLE" } }, "s3SchemaVersion": "1.0" },

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"responseElements": { "x-amz-id-2": "EXAMPLE123/5678abcdefghijklambdaisawesome/mnopqrstuvwxyzABCDEFGH", "x-amz-request-id": "EXAMPLE123456789" }, "awsRegion": "us-east-1", "eventName": "ObjectCreated:Put", "userIdentity": { "principalId": "EXAMPLE" }, "eventSource": "aws:s3" } ] }

S3aws-lambda https://riptutorial.com/zh-CN/aws-lambda/topic/6618/s3aws-lambda

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S. No

Contributors

1 aws-lambda Ahmed Abouhegaza, alatar, Community

2 Alexa-KIT Niroshan Ranapathi

3 AWS LambdaPython Nithin K Anil

4 AWS LambdaS3 Doug Schwartz

5 aws-lambdaC Taterhead

6 S3AWS Lambda Adonis Lee Villamor

7Alastair McCormack, Ashan, Eric Nord, Luc Boissaye, Niroshan Ranapathi

8 S3aws-lambda Alastair McCormack, Marshall Anschutz

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