LambdaServerlessRequest

General

LambdaServerlessRequest is an easy way to make requests to a Lambda serverless function instead of having to use API Gateway. LambdaServerlessRequest was heavily inspired by axios, and although there is not complete feature parity, and there are some interface changes, coming from axios to LambdaServerlessRequest will feel very natural.

Installation

$ npm i lambdaserverlessrequest

Examples

const serverlessRequest = require("lambdaserverlessrequest");

const request = serverlessRequest.create({
  "lambda": new AWS.Lambda({"region": "us-west-2"})
});

try {
  const result = await request({
    "method": "get",
    "functionName": "MyLambdaFunction1",
    "url": "/api/books"
  }));
  console.log(result);
} catch (e) {
  console.error(e);
}

try {
  const result = await serverlessRequest({
    "method": "post",
    "functionName": "MyLambdaFunction1",
    "url": "/api/books",
    "data": {"id": 1, "title": "The best book ever"}
    "lambda": new AWS.Lambda({"region": "us-west-2"})
  }));
  console.log(result);
} catch (e) {
  console.error(e);
}

Instance Methods

• lambdaServerlessRequest#request(config)
• lambdaServerlessRequest#get(url[, config])
• lambdaServerlessRequest#delete(url[, config])
• lambdaServerlessRequest#head(url[, config])
• lambdaServerlessRequest#options(url[, config])
• lambdaServerlessRequest#post(url[, data[, config]])
• lambdaServerlessRequest#put(url[, data[, config]])
• lambdaServerlessRequest#patch(url[, data[, config]])
• lambdaServerlessRequest#create(config)

Request Config

{
  // `url` is the server URL that will be used for the request
  url: '/user',

  // `method` is the request method to be used when making the request
  method: 'get', // default

  // `functionName` is the name of the Lambda function you wish to run for this request
  functionName: 'MyLambdaFunction1',

  // `headers` are custom headers to be sent
  headers: {'X-Requested-With': 'XMLHttpRequest'},

  // `params` are the URL parameters to be sent with the request
  // Must be a plain object
  params: {
    ID: 12345
  },

  // `data` is the data to be sent as the request body
  // Only applicable for request methods 'PUT', 'POST', and 'PATCH'
  // Must be of one of the following types:
  // - string, plain object
  data: {
    firstName: 'Steve'
  },

  // `responseType` indicates the type of data that the server will respond with
  // options are: 'arraybuffer', 'json'
  responseType: 'json', // default

  // `validateStatus` defines whether to resolve or reject the promise for a given
  // HTTP response status code. If `validateStatus` returns `true` (or is set to `null`
  // or `undefined`), the promise will be resolved; otherwise, the promise will be
  // rejected.
  validateStatus: function (status) {
    return status >= 200 && status < 300; // default
  }
}

Response Schema

{
  // `data` is the response that was provided by the server
  data: {},

  // `status` is the HTTP status code from the server response
  status: 200,

  // `headers` the headers that the server responded with
  // All header names are lower cased
  headers: {}
}

---

Major Differences Between LambdaServerlessRequest and axios

General

• Currently query parameters attached to the url won't be recognized
• Browser not supported
• Requires Node.js version 8 or higher
• We have currently only tested using async/await syntax, most functionality should work with promises, but this has not been tested at this point

Instance Methods

Removed/Not Present:

• getUri
• all
• spread

Request Config

Added:

• functionName
• lambda

Changed:

• params must be a plain object, URLSearchParams is not supported
• body only accepts String or plain Object as types
• responseType only accepts json and arraybuffer

Removed/Not Present:

• baseURL
• transformRequest
• transformResponse
• paramsSerializer
• timeout
• withCredentials
• adapter
• auth
• responseEncoding
• xsrfCookieName
• xsrfHeaderName
• onUploadProgress
• onDownloadProgress
• maxContentLength
• maxRedirects
• socketPath
• httpAgent
• httpsAgent
• proxy
• cancelToken

Response Config

Removed/Not Present:

• statusText
• config
• request