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@aws-sdk/protocol-http

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@aws-sdk/protocol-http

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What is @aws-sdk/protocol-http?

@aws-sdk/protocol-http is a package within the AWS SDK for JavaScript that provides HTTP request and response handling functionalities. It is designed to facilitate communication with AWS services by creating and managing HTTP requests and responses.

What are @aws-sdk/protocol-http's main functionalities?

Creating HTTP Requests

This feature allows you to create an HTTP request object with specified hostname, method, path, and headers. This is useful for setting up requests to AWS services or other endpoints.

const { HttpRequest } = require('@aws-sdk/protocol-http');

const request = new HttpRequest({
  hostname: 'example.com',
  method: 'GET',
  path: '/path',
  headers: {
    'Content-Type': 'application/json'
  }
});

console.log(request);

Handling HTTP Responses

This feature allows you to create an HTTP response object with specified status code, headers, and body. This is useful for handling responses from AWS services or other endpoints.

const { HttpResponse } = require('@aws-sdk/protocol-http');

const response = new HttpResponse({
  statusCode: 200,
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({ message: 'Success' })
});

console.log(response);

Middleware Integration

This feature demonstrates how to integrate middleware into the request/response lifecycle. Middleware can be used to add custom logic, such as logging or modifying requests and responses.

const { HttpRequest, HttpResponse } = require('@aws-sdk/protocol-http');
const { middlewareStack } = require('@aws-sdk/middleware-stack');

const stack = middlewareStack();

stack.add(
  (next, context) => async (args) => {
    console.log('Request:', args.request);
    const result = await next(args);
    console.log('Response:', result.response);
    return result;
  },
  {
    step: 'initialize',
    name: 'loggingMiddleware',
    priority: 'high'
  }
);

const request = new HttpRequest({
  hostname: 'example.com',
  method: 'GET',
  path: '/path'
});

stack.resolve(
  (handler) => handler({ request }),
  { request }
).then((result) => console.log(result));

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Package last updated on 20 Jul 2023

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