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description= A methodology for building modern, scalable, maintainable software-as-a-service apps.;
author= Adam Wiggins;
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the twelve factor app the twelve factor app blog community github vii port binding export services via port binding web apps are sometimes executed inside a webserver container for example php apps might run as a module inside apache httpd or java apps might run inside tomcat the twelve factor app is completely self contained and does not rely on runtime injection of a webserver into the execution environment to create a web facing service the web app exports http as a service by binding to a port and listening to requests coming in on that port in a local development environment the developer visits a service url like http localhost 5000 to access the service exported by their app in deployment a routing layer handles routing requests from a public facing hostname to the port bound web processes this is typically implemented by using dependency declaration to add a webserver library to the app such as tornado for python thin for ruby or jetty for java and other jvm based languages this happens entirely in user space that is within the app s code the contract with the execution environment is binding to a port to serve requests http is not the only service that can be exported by port binding nearly any kind of server software can be run via a process binding to a port and awaiting incoming requests examples include ejabberd speaking xmpp and redis speaking the redis protocol note also that the port binding approach means that one app can become the backing service for another app by providing the url to the backing app as a resource handle in the config for the consuming app česky cs deutsch de ελληνικά el english en español es فارسی fa français fr italiano it 日本語 ja 한국어 ko polski pl português do brasil pt_br русский ru slovensky sk ภาษาไทย th türkçe tr українська uk tiếng việt vi 简体中文 zh_cn previous next česky cs deutsch de ελληνικά el english en español es فارسی fa français fr italiano it 日本語 ja 한국어 ko polski pl português do brasil pt_br русский ru slovensky sk ภาษาไทย th türkçe tr українська uk tiếng việt vi 简体中文 zh_cn written by adam wiggins last updated 2017 sourcecode download epub book copyright 2026 salesforce inc all rights reserved various trademarks held by their respective owners salesforce tower 415 mission street 3rd floor san francisco ca 94105 united states legal terms of service privacy information responsible disclosure trust contact your privacy choices cookie preferences
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