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function.js
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148 lines (133 loc) · 4.38 KB
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const { packTo } = require('@serverless-devs/s-zip');
const { Logger } = require('@serverless-devs/core');
const path = require('path');
const fs = require('fs');
const { sleep, randomStr } = require('../utils')
const trustPolicyDocument = `{
"Version": "2012-10-17",
"Statement": [{
"Effect": "Allow",
"Action": ["sts:AssumeRole"],
"Principal": {
"Service": ["lambda.amazonaws.com"]
}
}]
}`;
class Function {
constructor(aws) {
// super();
const lambda = aws.lambda();
const iam = aws.iam();
this.lambda = async (functionKey, inputs) => {
return await new Promise((resolve, reject) => {
lambda[functionKey](inputs, (e, data) => {
if (e) {
reject(e);
}
resolve(data);
});
})
}
this.iam = async (functionKey, inputs) => {
return await new Promise((resolve, reject) => {
iam[functionKey](inputs, (e, data) => {
if (e) {
reject(e);
}
resolve(data);
});
})
}
}
async prepareCode (inputs) {
let codeUri = inputs.Code || inputs.CodeUri;
const artifactConfigured = (codeUri.endsWith('.zip') || codeUri.endsWith('.jar') || codeUri.endsWith('.war'))
if (!artifactConfigured) {
const outputFileName = `${inputs.FunctionName}.zip`;
const packToParame = {
codeUri,
outputFileName
};
const test = await packTo(packToParame);
if (!test.count) {
throw new Error('Zip file error')
}
codeUri = path.join(process.cwd(), './.s/.cache', outputFileName);
}
const data = await fs.readFileSync(codeUri);
return {
ZipFile: data
};
}
async createRole (functionName) {
Logger.log(`The configuration does not have role information, and the component generates the role automatically.`, 'yellow');
const roleName = `s-${functionName}-role-${randomStr()}`;
Logger.log(`Start generating roleName: ${roleName}`);
const { Role } = await this.iam('createRole', {
RoleName: roleName,
AssumeRolePolicyDocument: trustPolicyDocument,
Description: 's auto generate role.'
});
await this.iam('attachRolePolicy', {
RoleName: roleName,
PolicyArn: 'arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole'
});
Logger.log('Successfully generated role.');
return Role.Arn;
}
/**
*
* @param {*} functionInput 参数
* @param {*} retry 重试次数
* @param {*} times 第几次重试
*/
async createFunction (functionInput, retry = 1, times = 1) {
const functionName = functionInput.FunctionName;
if (!functionInput.Role) {
retry = 5;
functionInput.Role = await this.createRole(functionName);
Logger.log('Start trying to create functions after 6 seconds of sleep.', 'yellow');
await sleep(6000);
}
try {
return await this.lambda('createFunction', functionInput);
} catch (e) {
if (times < retry && e.message === 'The role defined for the function cannot be assumed by Lambda.') {
Logger.log(`Create Failure: ${e.message}`, 'red');
Logger.log(`Retry ${times} times`);
await sleep(1500);
return await this.createFunction(functionInput, retry, times + 1);
}
throw new Error(e.message)
}
}
async deploy (properties) {
const functionInput = JSON.parse(JSON.stringify(properties.Function));
const functionName = functionInput.FunctionName;
Logger.log('Start compressing code.');
const code = await this.prepareCode(functionInput);
Logger.log('Successful compression code.');
try {
await this.lambda('getFunction', { FunctionName: functionName });
await this.lambda('updateFunctionCode', {
FunctionName: functionName,
ZipFile: code.ZipFile
});
delete functionInput.Code;
delete functionInput.CodeUri;
return await this.lambda('updateFunctionConfiguration', functionInput);
} catch (e) {
if (e.code === 'ResourceNotFoundException') {
functionInput.Code = code;
delete functionInput.CodeUri;
return await this.createFunction(functionInput);
}
throw new Error(e.message)
}
}
async remove (properties) {
const functionName = properties.Function.FunctionName;
return await this.lambda('deleteFunction', { FunctionName: functionName });
}
}
module.exports = Function;