Plack - LPW 2009

Keep hearing about Plack and PSGI, and not really sure what they're for, and why they're popular? Maybe you're using Plack at work, and you're still copying-and-pasting `builder` lines in to your code without really knowing what's going on? What's the relationship between Plack, PSGI, and CGI? Plack from first principles works up from how CGI works, the evolution that PSGI represents, and how Plack provides a user-friendly layer on top of that.

Plack provides a common interface called PSGI (Perl Server Gateway Interface) that allows Perl web applications to run on different web servers. It includes tools like Plackup for running PSGI applications from the command line and middleware for adding functionality. Plack has adapters that allow many existing Perl web frameworks to run under PSGI. It also provides high performance PSGI servers and utilities for building and testing PSGI applications.

This document discusses the evolution of web development in Perl, from CGI scripts to modern PSGI-based frameworks. It introduces PSGI as an interface between web applications and web servers, and Plack as a toolkit for building PSGI applications and middleware. The document outlines many PSGI web servers and frameworks that can be used to build and deploy Perl web applications according to the PSGI standard.

This document provides an overview and introduction to using the Sinatra web framework for building RESTful web applications in Ruby. It discusses Sinatra's philosophy of being simple and easy to use, introduces REST principles and how Sinatra supports them through HTTP verbs, routing, caching, authentication and more. Code examples are provided to demonstrate how a basic "Hello World" application is structured in Sinatra and how requests are routed and executed under the hood.

Run a website with Perl? - you should learn how to use Plack. Most Perl web frameworks support it and it makes your life a lot easier and a lot more fun

This document summarizes a talk about using Sinatra and RestClient for building lightweight web services and clients. Sinatra provides a simple and lightweight way to build web applications compared to full-featured frameworks like Rails. RestClient provides a simple way to make HTTP requests from client applications, offering more functionality than Net::HTTP but with less complexity than ActiveResource. Examples of Sinatra and RestClient use include a Git wiki application built in 355 lines of Ruby code and a Heroku client library.

This document summarizes and compares Ruby HTTP client libraries. It discusses the sync and async APIs of 16 libraries including Net::HTTP, HTTPClient, and Faraday. It covers their compatibility, supported features like keep-alive connections, and performance based on benchmarks. The document recommends libraries based on priorities like speed, HTML handling, API clients, and SSL support. It encourages readers to check the detailed feature matrix and report any errors found.

An in-depth look at Sinatra and Rack, how they can be used to build web APIs, and some useful Rubygems and patterns for building complex Sinatra apps.

"How to write pluggable software" presented by Tatsuhiko Miyagawa at YAPC::Asia 2007 in Tokyo on April 5th 2007.

Practices in using Swoole ecosystem & migration real production marketplace app to async approach. Which benefits we got and what problems happens on stack with PHP8, Postgresql, Redis, RebbitMQ, Doctrine, coroutines/fibers, concurrency HTTP Server.

This document discusses deploying Plack web applications. It begins with an overview of the PSGI specification and how it allows various web frameworks like Catalyst and Dancer to run on different web servers through a common interface. It then discusses various options for the server environment including standalone HTTP servers like Starman and FastCGI servers. Finally, it covers useful Plack middleware for application environments, including modules for rate limiting, caching, authentication, and more.

The document discusses using fibers and evented programming with Ruby to achieve asynchronous and concurrent behavior without threads. It introduces EventMachine and EM-Synchrony for implementing asynchronous drivers and applications. Code examples show wrapping database queries in fibers to make them non-blocking. This allows running queries concurrently using a threadpool and achieving higher throughput than blocking implementations. The approach is applied to build an asynchronous version of Rails using EventMachine, fibers and the Thin web server.

Data::ObjectDriver is a simple and transparent data interface library with caching capabilities. It provides an object-oriented interface to database tables and supports features like master-slave replication, partitioning, and caching using Memcached. Classes define the schema and connection details. Methods provide CRUD functionality and relationships. Custom drivers can be created to support different database architectures or caching strategies.

The document discusses testing practices for the Ruby programming language. It provides details on how to run various test suites that are part of the Ruby source code repository, including: 1. Running the "make test" command which runs sample tests, known bug tests, and tests defined in the test/ directory. 2. Running "make test-all" which runs core library and standard library tests under the test/ directory. 3. Running "make check" which builds encodings and extensions, runs all test tasks including test frameworks like Test::Unit and Minitest. 4. It also discusses strategies for merging test changes from external repositories like RubyGems and RDoc back into the Ruby source code

This document discusses Sinatra, a Ruby web application framework built with Rack middleware. It provides examples of basic Sinatra applications and routes, and discusses how Sinatra apps can also be used as Rack middleware. It promotes some projects by the author including Amnesia for Memcached stats, Munch for recipe search, and Postie for postcode services implemented as Rack middleware. It also discusses related tools like Shotgun for reloading and Rack middleware like Rack::Cache.

This document discusses Rhebok, a high performance Rack handler written in Ruby. Rhebok uses a prefork architecture for concurrency and achieves 1.5-2x better performance than Unicorn. It implements efficient network I/O using techniques like IO timeouts, TCP_NODELAY, and writev(). Rhebok also uses the ultra-fast PicoHTTPParser for HTTP request parsing. The document provides an overview of Rhebok, benchmarks showing its performance, and details on its internals and architecture.

In this talk we will present a middleware async architecture based on Expressive and Swoole to speed up web API development and runtime in PHP. Using this approach, you will be able to achieve great performance improvement, up to 4x faster than nginx or Apache (benchmark).

PSGI and Plack provide a common interface (PSGI) and shared infrastructure (Plack) for building web applications and frameworks in Perl. PSGI defines a standard way for applications to communicate with web servers through a request/response interface. Plack provides many server implementations like FastCGI and standalone that can run PSGI applications. It also includes middleware, testing tools, and utilities to help developers. This new approach allows frameworks and applications to focus on their logic while reusing common plumbing through PSGI and Plack.

Plack is an interface for web request handlers that simplifies the interface and makes code more portable. It allows developers to focus on request handling rather than API specifics. Plack addresses issues with traditional CGI and mod_perl approaches by running handlers outside of servers in a standardized way. This encapsulation improves performance, debugging, and code reuse across different server implementations. Plack includes modules for common tasks like routing, middleware, and running PSGI applications on various web servers.

How to build a High Performance PSGI/Plack Server PSGI/Plack・Monocerosで学ぶ ハイパフォーマンス Webアプリケーションサーバの作り方

Marcus works at Nordaaker Consulting but they are moving south in January. He demonstrates how to use Mojolicious to make HTTP requests and parse the response using Mojo::DOM. Mojolicious is a full-stack web framework for Perl 5 that provides a modular architecture and aims to have minimal dependencies.

The API Platform framework is a set of tools to help you building API-first projects. The API project Platform is built on top of the Symfony framework, it means you can reuse all your Drupal 8 and Symfony skills and benefit of the incredible amount of Symfony documentation and community bundles. During this session, you will learn how to use the API Platform project to create a modern web application using Symfony, Doctrine, ReactJS, Redux, Redux-Saga, Ant Design and DVA.

The document discusses using TorqueBox, a Ruby application server based on JRuby and JBoss AS7, to deploy a Rails application in production. It compares various deployment options from rolling your own infrastructure to using a platform as a service like Heroku. TorqueBox provides a middle ground where it handles services like caching, background jobs, scheduling, and clustering but still allows customization. The document walks through migrating an existing Rails app's Delayed::Job and caching implementations to use TorqueBox equivalents to simplify the deployment.

Rack is a Ruby web server interface that provides a minimal interface between web servers and Ruby frameworks like Rails. It allows web applications to be written as Ruby objects that respond to the call method. Rack applications take a request environment hash and return a status, headers, and response body array. Rack allows modularity through middlewares that act as filters on requests. Rails itself is built with Rack and exposes its middleware stack.

Mirah is a Ruby-like language that compiles to Java bytecode, allowing Ruby developers to write Android apps without using Java. The document introduces Mirah and Pindah, a framework that makes it easier to develop Android apps in Mirah. It provides an example "Up or Down?" app that checks the status of websites and displays results. While Mirah offers a more Ruby-like syntax, it is still immature and tooling support needs improvement, making large Android app development challenging.

The document discusses various web application frameworks and deployment methods in Perl. It covers common frameworks like CGI, mod_perl, Catalyst, and PSGI. It then discusses running PSGI applications with plackup, configuring middleware, and deploying PSGI apps behind web servers or as standalone daemons. Finally, it briefly covers application deployment and management with tools like daemontools.

Talk at rootconf - A conference at Bangalore for sysadmins. Gist of the talk:- Puppet is a great configuration management tool and git is great at version controlling.AWS lets you create instances in few clicks. But when it comes to large deployments only automation(where tools come together) can make you productive and happy. I will take you through following.. Fog - The Ruby cloud services library and how it helps you to create vendor neutral cloud deployments, Puppet- Multi region puppet masters, Ruby- How Ruby pulls the strings together in EC2/ELB/RDS creation, Security group creation, IP authorization, Route53 DNS etc, Git- how we use git to version control deployment configs/configurations.

An introduction to the Ring and Compojure libraries for clojure. Presentation from the February meeting of the Austin Clojure Meetup.

This document summarizes Deepak Garg's presentation on Fabric and app deployment automation. Fabric allows defining Python functions to automate system administration and deployment tasks across multiple servers. Example functions showed provisioning VMs, installing packages, deploying code, and more. Fabric offers commands to run commands remotely, upload/download files, and decorators to define server groups and task properties. The goals of Fabric include testing infrastructure, deploying and scaling apps across identical environments, and making systems administration tasks Pythonic and automated.

1) The document discusses the author's experience building their own node.js web framework, including their background with other technologies like Ruby on Rails. 2) It describes the key features of their framework, such as MVC structure, middleware support, asset packaging, and command line tools. 3) The author explains that they rolled their own framework to learn more about how frameworks work, have more control over the technology stack, and because node.js performance is better than Ruby on Rails. They emphasize that building the framework was a fun learning experience.

Rack provides a simple interface for building web applications in Ruby. This document outlines how to build a basic web framework on top of Rack by leveraging existing Rack middleware and tools. It demonstrates how to add features like routing, controllers, views, ORM, authentication, testing, and a console using middleware like Usher, Tilt, DataMapper, Warden, rack-test, and racksh. The goal is to create a simple but full-featured framework with minimal code by combining existing Rack components.

The document discusses automating software deployment using Ansible. It provides an overview of Ansible's basic concepts like inventory files to define hosts, playbooks to execute tasks on hosts, and roles to bundle related tasks. It then discusses using Ansible roles to automate deployments, including the ansistrano roles which can deploy applications by copying files, managing releases, and supporting deployment hooks. Overall the document presents Ansible as a way to easily automate and standardize software deployment processes.

This presentation covers from the basics of what is an async task and how it works to more advanced features of Celery.

This document discusses using various technologies on Google App Engine including JIQL, GaeVFS, RESTlets, scheduled tasks, JRuby on Rails, task queues, XMPP, and Clojure. JIQL emulates a relational database on App Engine's Bigtable datastore. GaeVFS provides a virtual filesystem on Bigtable. RESTlets make RESTful web services easy to implement in Java on App Engine. Scheduled tasks allow for background processing via cron jobs. JRuby on Rails provides a way to run Ruby on Rails applications on App Engine. Task queues allow for asynchronous background processing. XMPP enables instant messaging and peer-to-peer applications. Clojure can also be used

This document discusses how Rails may not be the best tool for rapid prototyping and suggests alternatives that are more lightweight and collaborative. It introduces Serve, an alternative to Rails that uses a simple folder structure and views to quickly prototype ideas without models, controllers or routing. Serve works with popular front-end tools and libraries and can deploy to Heroku. The document argues that prototyping tools should empower all team members, including front-end developers, and that Rack middleware like Rack::Cascade allows reusing mockups and wireframes in a Rails app.

AngularJS is a really powerful and extensible Javascript library that can be used for all number of applications. The team that up with Flask and you've got a great power and maintainability.

Punc is a framework for building system administration applications. It allows users to select target hosts, connect to them securely, run modules on them to retrieve information or make changes, and reuse code via a module programming model. Modules run commands and return structured data like scalars, hashes and arrays. Punc uses JSON-RPC over HTTPS to call modules securely on target hosts. It detects operating systems using Pfacter to use the right module for the target system. The framework is open source and development is ongoing to support more modules and features.

This document summarizes a presentation about managing CPAN dependencies for web development projects. It describes a case study where a developer installed many CPAN modules for a new web app, but ran into problems with dependency and versioning issues during deployment to production servers. The presenter then introduced their solution called Carton, a tool for creating isolated, local Perl environments for apps and locking dependency versions to allow reproducible, stable deployments across different machines. Key features discussed included dependency declaration, isolated environments, version control, analysis and more. The document concludes with a call for questions and thanks.

cpanminus (cpanm) is an awesome and lightweight CPAN installer with zero dependencies. It requires less than 10MB of RAM, has no interactive shell, uses sane defaults with quiet output, and can be easily upgraded via a single command. The document recommends starting to use cpanm and provides tips on commands like --prompt, --notest, and using it with PERL_CPANM_OPT and perlbrew.

This document summarizes how a new module is uploaded and distributed on CPAN. It takes approximately 48 hours from when an author uploads a module until it is available to most users. To address this, a real-time CPAN feed was created using FriendFeed to notify users more quickly, within an hour, after a new module is uploaded. The cpanf application allows users to install new CPAN modules via these real-time feeds to get modules more quickly than waiting for the standard 24 hour CPAN cache update.

Remedie is a media RSS browser written in Perl and jQuery. It aggregates RSS/Atom feeds and supports playing videos and audio inline with Flash or QuickTime. Features include support for Media RSS, custom plugins, playback options, local video folders, and an iPhone-like UI. A demo is provided showing features like continuous playback, hotkeys, drag and drop, incremental search and more. The roadmap includes making the daemon non-blocking and adding downloads, social network integration and an iPhone remote.

The document shows code for parsing and handling XML using different Perl modules. It demonstrates parsing XML strings into DOM documents using XML::LibXML and XML::Liberal, handling XML encoding such as entities and namespaces, and extracting elements and contents from the parsed DOM documents.

This document introduces the Web::Scraper module for Perl, which provides a more robust and maintainable way to scrape web pages compared to regular expressions. Web::Scraper uses a DSL to select elements and extract data via CSS or XPath selectors. It returns structured data like URLs, text, and name-value pairs from selected elements. The document provides examples of scraping timestamps, links, and lists of sites to demonstrate how Web::Scraper works and its advantages over traditional scraping with regular expressions.

The document discusses using Web::Scraper to scrape web pages in a robust, maintainable way by using CSS selectors and XPath queries rather than fragile regular expressions. Web::Scraper provides a domain-specific language for defining scraping processes and extracting desired data from web pages into structured results. Examples show how to scrape links, text, and nested data from HTML elements using a simple declarative syntax.

The document discusses practical web scraping using the Web::Scraper module in Perl. It provides an example of scraping the current UTC time from a website using regular expressions, then refactors it to use Web::Scraper for a more robust and maintainable approach. Key advantages of Web::Scraper include using CSS selectors and XPath to be less fragile, and proper handling of HTML encoding.

The document discusses XML::Liberal, a Perl module that allows XML parsers to successfully parse XML documents that contain errors. It provides examples of how XML::Liberal can be used to override an existing XML parser like XML::LibXML to make it more liberal in parsing invalid XML. It also shows how XML::Liberal can be used to try parsing XML with a fallback parser if the primary parser fails due to errors in the XML.

The document discusses Test::Base, a Perl module for data-driven testing. It provides examples of using Test::Base for testing functions, with compatibility with Test::More. Test::Base allows writing tests in a simple format and filtering of input/output. It also supports features like default blocks, block-specific tests, subclassing and more. Tips discussed include avoiding chomp filters and separating success and error tests.

at DECON (Developers environment conference) 2006 in Tokyo.

Plagger is a pluggable RSS/Atom aggregator that allows users to combine ("pipe") various plugins to customize how feeds are aggregated, filtered, and published/notified. It aims to be the "UNIX pipe of the internet" by providing a simple yet powerful framework to connect different data sources and processing modules in a customizable workflow. The document provides many examples of how Plagger can be used to aggregate feeds from sources like Bloglines or OPML files and publish them to email via Gmail by chaining together relevant subscription, filter, and publish plugins.

This document discusses integrating Google Maps with tilt input from a laptop. It provides code examples in C++, Ruby and Perl for reading tilt sensor data on Windows. It also shows how to combine Google Maps JavaScript API with Perl code to update the map based on tilt input detected by Perl.

The document discusses how Vox, a large-scale, fast, internationalized website, is built using various web technologies. It uses Catalyst as its web framework, Data::ObjectDriver for caching and partitioning data across multiple databases, Perlbal for fast static content delivery, and Memcached for caching. Template Toolkit templates are optimized through versioned caching and syscall reduction. Asynchronous job queueing and ID allocation improve performance and scalability.

We are honored to launch and host this event for our UiPath Polish Community, with the help of our partners - Proservartner! We certainly hope we have managed to spike your interest in the subjects to be presented and the incredible networking opportunities at hand, too! Check out our proposed agenda below 👇👇 08:30 ☕ Welcome coffee (30') 09:00 Opening note/ Intro to UiPath Community (10') Cristina Vidu, Global Manager, Marketing Community @UiPath Dawid Kot, Digital Transformation Lead @Proservartner 09:10 Cloud migration - Proservartner & DOVISTA case study (30') Marcin Drozdowski, Automation CoE Manager @DOVISTA Pawel Kamiński, RPA developer @DOVISTA Mikolaj Zielinski, UiPath MVP, Senior Solutions Engineer @Proservartner 09:40 From bottlenecks to breakthroughs: Citizen Development in action (25') Pawel Poplawski, Director, Improvement and Automation @McCormick & Company Michał Cieślak, Senior Manager, Automation Programs @McCormick & Company 10:05 Next-level bots: API integration in UiPath Studio (30') Mikolaj Zielinski, UiPath MVP, Senior Solutions Engineer @Proservartner 10:35 ☕ Coffee Break (15') 10:50 Document Understanding with my RPA Companion (45') Ewa Gruszka, Enterprise Sales Specialist, AI & ML @UiPath 11:35 Power up your Robots: GenAI and GPT in REFramework (45') Krzysztof Karaszewski, Global RPA Product Manager 12:20 🍕 Lunch Break (1hr) 13:20 From Concept to Quality: UiPath Test Suite for AI-powered Knowledge Bots (30') Kamil Miśko, UiPath MVP, Senior RPA Developer @Zurich Insurance 13:50 Communications Mining - focus on AI capabilities (30') Thomasz Wierzbicki, Business Analyst @Office Samurai 14:20 Polish MVP panel: Insights on MVP award achievements and career profiling

Revolutionize your transportation processes with our cutting-edge RPA software. Automate repetitive tasks, reduce costs, and enhance efficiency in the logistics sector with our advanced solutions.

YOUR RELIABLE WEB DESIGN & DEVELOPMENT TEAM — FOR LASTING SUCCESS WPRiders is a web development company specialized in WordPress and WooCommerce websites and plugins for customers around the world. The company is headquartered in Bucharest, Romania, but our team members are located all over the world. Our customers are primarily from the US and Western Europe, but we have clients from Australia, Canada and other areas as well. Some facts about WPRiders and why we are one of the best firms around: More than 700 five-star reviews! You can check them here. 1500 WordPress projects delivered. We respond 80% faster than other firms! Data provided by Freshdesk. We’ve been in business since 2015. We are located in 7 countries and have 22 team members. With so many projects delivered, our team knows what works and what doesn’t when it comes to WordPress and WooCommerce. Our team members are: - highly experienced developers (employees & contractors with 5 -10+ years of experience), - great designers with an eye for UX/UI with 10+ years of experience - project managers with development background who speak both tech and non-tech - QA specialists - Conversion Rate Optimisation - CRO experts They are all working together to provide you with the best possible service. We are passionate about WordPress, and we love creating custom solutions that help our clients achieve their goals. At WPRiders, we are committed to building long-term relationships with our clients. We believe in accountability, in doing the right thing, as well as in transparency and open communication. You can read more about WPRiders on the About us page.

Cybersecurity is a major concern in today's connected digital world. Threats to organizations are constantly evolving and have the potential to compromise sensitive information, disrupt operations, and lead to significant financial losses. Traditional cybersecurity techniques often fall short against modern attackers. Therefore, advanced techniques for cyber security analysis and anomaly detection are essential for protecting digital assets. This blog explores these cutting-edge methods, providing a comprehensive overview of their application and importance.

Slide of the tutorial entitled "Paradigm Shifts in User Modeling: A Journey from Historical Foundations to Emerging Trends" held at UMAP'24: 32nd ACM Conference on User Modeling, Adaptation and Personalization (July 1, 2024 | Cagliari, Italy)

MuleSoft Meetup on APM and IDP

Java Servlet programs

Invited Remote Lecture to SC21 The International Conference for High Performance Computing, Networking, Storage, and Analysis St. Louis, Missouri November 18, 2021

Solar Storms (Geo Magnetic Storms) are the motion of accelerated charged particles in the solar environment with high velocities due to the coronal mass ejection (CME).

The integration of programming into civil engineering is transforming the industry. We can design complex infrastructure projects and analyse large datasets. Imagine revolutionizing the way we build our cities and infrastructure, all by the power of coding. Programming skills are no longer just a bonus—they’re a game changer in this era. Technology is revolutionizing civil engineering by integrating advanced tools and techniques. Programming allows for the automation of repetitive tasks, enhancing the accuracy of designs, simulations, and analyses. With the advent of artificial intelligence and machine learning, engineers can now predict structural behaviors under various conditions, optimize material usage, and improve project planning.

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Are you interested in dipping your toes in the cloud native observability waters, but as an engineer you are not sure where to get started with tracing problems through your microservices and application landscapes on Kubernetes? Then this is the session for you, where we take you on your first steps in an active open-source project that offers a buffet of languages, challenges, and opportunities for getting started with telemetry data. The project is called openTelemetry, but before diving into the specifics, we’ll start with de-mystifying key concepts and terms such as observability, telemetry, instrumentation, cardinality, percentile to lay a foundation. After understanding the nuts and bolts of observability and distributed traces, we’ll explore the openTelemetry community; its Special Interest Groups (SIGs), repositories, and how to become not only an end-user, but possibly a contributor.We will wrap up with an overview of the components in this project, such as the Collector, the OpenTelemetry protocol (OTLP), its APIs, and its SDKs. Attendees will leave with an understanding of key observability concepts, become grounded in distributed tracing terminology, be aware of the components of openTelemetry, and know how to take their first steps to an open-source contribution! Key Takeaways: Open source, vendor neutral instrumentation is an exciting new reality as the industry standardizes on openTelemetry for observability. OpenTelemetry is on a mission to enable effective observability by making high-quality, portable telemetry ubiquitous. The world of observability and monitoring today has a steep learning curve and in order to achieve ubiquity, the project would benefit from growing our contributor community.

Six months into 2024, and it is clear the privacy ecosystem takes no days off!! Regulators continue to implement and enforce new regulations, businesses strive to meet requirements, and technology advances like AI have privacy professionals scratching their heads about managing risk. What can we learn about the first six months of data privacy trends and events in 2024? How should this inform your privacy program management for the rest of the year? Join TrustArc, Goodwin, and Snyk privacy experts as they discuss the changes we’ve seen in the first half of 2024 and gain insight into the concrete, actionable steps you can take to up-level your privacy program in the second half of the year. This webinar will review: - Key changes to privacy regulations in 2024 - Key themes in privacy and data governance in 2024 - How to maximize your privacy program in the second half of 2024

This is a slide deck that showcases the updates in Microsoft Copilot for May 2024

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Blockchain technology is transforming industries and reshaping the way we conduct business, manage data, and secure transactions. Whether you're new to blockchain or looking to deepen your knowledge, our guidebook, "Blockchain for Dummies", is your ultimate resource.