为什么Phoenix不使用Plug来启动服务器？
[英]Why Phoenix doesn't use Plug to start the server?
问题描述
liveforeverx on irc has answered my original question and I have modified this question as a followup. 
irc上的liveforeverx回答了我原来的问题，我已将此问题修改为后续问题。
Phoenix depends on Plug for many of its function. Phoenix的许多功能都依赖于Plug。 However, when it comes to starting cowboy server, why doesn't Phoenix start it using Plug's api in Phoenix.Endpoint.CowboyHandler.start_link? 但是，当谈到启动牛仔服务器时，凤凰为什么不在Phoenix.Endpoint.CowboyHandler.start_link中使用Plug的api启动呢？ Why does start_link on ranch_listener_sup is called instead? 为什么要调用ranch_listener_sup上的start_link呢？
Is it because of any limitation of Plug or is it because Phoenix started this way much before Plug's api got matured? 是因为Plug的任何限制还是因为Phoenix在Plug的api成熟之前就开始了这么多？
My Original Question: 我原来的问题：
How/where does Phoenix start cowboy? 菲尼克斯如何/在哪里开始牛仔？
Reading the Plug docs, I see that to start a server, one has to call 阅读Plug文档，我看到要启动服务器，必须调用
Plug.Adapters.Cowboy.http/3
However, grepping through my phoenix app and the phoenix source code, I do not see any instance of call to Plug.Adapters.Cowboy.http/3 . 但是，通过我的凤凰应用程序和凤凰源代码，我没有看到任何调用Plug.Adapters.Cowboy.http/3实例。 How/where does Phoenix start cowboy? 菲尼克斯如何/在哪里开始牛仔？
1 个解决方案
解决方案1
9 已采纳 2015-05-15 08:20:22
Two reasons: 两个原因：
To support websockets
支持websockets Because Phoenix starts the server inside your application supervision tree instead of running your app inside Cowboy
因为Phoenix在应用程序监督树中启动服务器而不是在Cowboy中运行您的应用程序
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