npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

trooba-http-transport

v2.1.0

Published

HTTP transport for trooba pipeline

Downloads

13

Readme

trooba-http-transport

Greenkeeper badge

codecov Build Status NPM Downloads Known Vulnerabilities

HTTP transport for trooba pipeline.

The transport provides server and client API with trooba context propagation support. For more information one might want to read this.

Get Involved

  • Contributing: Pull requests are welcome!
  • Support: Join our gitter chat to ask questions to get support from the maintainers and other Trooba developers

Install

npm install trooba-http-transport --save

Usage

The context serialization logic depends on type of the pipeline:

  • Web application
  • Service application
  • Service invocation

Web application pipeline

This type of pipeline needs to deserialize context from cookies into pipe.context and in the response flow from pipe.context into cookies.

const Cookies = require('cookies');
const app = Trooba.use(httpTransport, {
    port: 0,
    context: {
        serialize: (context, serverContext) => {
            const target = Object.keys(context).forEach(name => {
                if (name.charAt(0) !== '$') {
                    const options = context[name] === undefined ?
                        // delete cookie if the property is deleted
                        {maxAge: -1} :
                        {}
                    serverContext.cookies.set(name, context[name], options);
                }
            }, {});
        },
        deserialize: (serverContext, context) => {
            serverContext.cookies = new Cookies(
                serverContext.request,
                serverContext.response,
                { keys: keys });

            context.userName = serverContext.cookies.get('username');
            context.locale = serverContext.cookies.get('locale');
            context.jsEnabled = serverContext.cookies.get('jsEnabled');
        }
    }
});

Service application pipeline

This type of pipeline needs to deserialize context from request header/headers into pipe.context and in the response flow from pipe.context into response header/headers.

const app = Trooba.use(httpTransport, {
    port: 0,
    context: {
        serialize: (context, serverContext) => {
            const deleted = [];
            const target = Object.keys(context).reduce((memo, name) => {
                if (name.charAt(0) !== '$') {
                    if (context[name] === undefined) {
                        // remember what was deleted
                        deleted.push(name);
                        return memo;
                    }
                    memo[name] = context[name];
                }
                return memo;
            }, {});
            // propagate deleted fields
            target['@deleted'] = deleted.length ? deleted : undefined;
            serverContext.response.setHeader('x-trooba-context', JSON.stringify(target));
        },
        deserialize: (serverContext, context) => {
            const pipeContext = serverContext.request.headers['x-trooba-context'];
            if (pipeContext) {
                Object.assign(context, JSON.parse(pipeContext));
            }
        }
    }
});

Service invocation pipeline

This type of pipeline needs to serialize context into a special request header/headers and in the response flow deserialize from response header/headers into pipe.context.

For example, one can use the following context provider:

require('trooba')
    .use(httpTransport, {
        protocol: 'http:',
        hostname: 'www.google.com',
        connectTimeout: 100,
        socketTimeout: 1000,
        context: { // context is optional
            serialize: (context, serverContext) => {
                const target = Object.keys(context).reduce((memo, name) => {
                    if (name.charAt(0) !== '$') {
                        memo[name] = context[name];
                    }
                    return memo;
                }, {});
                serverContext.response.setHeader('x-trooba-context', JSON.stringify(target));
            },
            deserialize: (serverContext, context) => {
                const troobaContext = serverContext.request.headers['x-trooba-context'];
                if (troobaContext) {
                    Object.assign(context, JSON.parse(troobaContext));
                }
            }
        }
    })
    .build('client:default')
    .get({
        q: 'nike'
    })
    .set('some', 'header')
    .end(function (err, response) {
        console.log(err, response && response.body)
    });