@essent/serverless-request-handler
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2.0.1 • Public • Published

serverless-request-handler

A request handler that uses class-transformer and class-validator to create a type-safe serverless handler

What is serverless-request-handler

Serverless request handler is a micro-framework that's here to make your life easier. You give it an options object with what you expect the request to look like; and it does the object request transformation, request validation, response validation and error handdling.

A typical handler will look like this.

class CreateUserDto {
    @IsEmail()
    userName: string;

    @IsString()
    @MinLength(7)
    password: string;
}

class UserPathParams {
    @IsNumber()
    userId: number;
}

const options = {
    body: {
        classType: CreateUserDto
    },
    pathParameters: {
        classType: UserPathParams
    }
};


const createUser = handler(options, async (event) => {
    return Result.Ok(201, userService.create(event.pathParameters.userId, event.body));
});

Installation

  1. Install module:

    npm install serverless-request-handler --save

  2. reflect-metadata shim is required, install it too:

    npm install reflect-metadata --save

    and make sure to import it in a global place, like server.ts:

    import "reflect-metadata";
  3. class-validator and class-transfrormer are required peer dependencies

    npm install class-validator class-transfrormer --save

  4. ES6 features are used, if you are using old version of node.js you may need to install es6-shim:

    npm install es6-shim --save

    and import it in a global place like app.ts:

    import "es6-shim";

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Install

npm i @essent/serverless-request-handler

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Version

2.0.1

License

MIT

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