Rails 似乎为该页面提供两次服务 [英] Rails seems to be serving the page twice
问题描述
这是我在发出单页请求时在本地日志文件中看到的内容:
this is what I see in my local log file when I make a single page request:
Started GET "/" for 127.0.0.1 at Mon Apr 25 22:12:22 -0700 2011
User Load (0.9ms) SELECT "users".* FROM "users" WHERE ("users"."id" = 2) LIMIT 1
Processing by PagesController#beta as HTML
Rendered pages/beta.html.erb within layouts/beta (16.2ms)
Completed 200 OK in 23ms (Views: 18.8ms | ActiveRecord: 7.7ms)
Started GET "/" for 127.0.0.1 at Mon Apr 25 22:12:23 -0700 2011
User Load (0.6ms) SELECT "users".* FROM "users" WHERE ("users"."id" = 2) LIMIT 1
Processing by PagesController#beta as */*
Rendered pages/beta.html.erb within layouts/beta (17.9ms)
Completed 200 OK in 27ms (Views: 21.5ms | ActiveRecord: 6.6ms)
任何人都知道可能导致这种情况的原因是什么?加工线有趣吗?
Anyone have any ideas what could be causing this? the Processing line is interesting?
PagesController#beta as HTML
PagesController#beta as */*
这是什么意思?
推荐答案
我已经看到这种情况发生是因为 img 标签带有空白的 src 属性.为 img、script、link 或类似标签提供 src 或 href 属性="" 将解析到当前页面.因此，它会在尝试加载资产时再次尝试加载页面.它也可以在 CSS url() 属性或 AJAX 调用中.
I've seen this happen because of an img tag with a blank src attribute. Giving an img, script, link or similar tag a src or href attribute ="" will resolve to the current page. So it will try to load the page a second time as it tried to load the asset. It could also be in a CSS url() property or an AJAX call.
一种简单的判断方法是在您的 中临时放置类似 <base href="http://example.com"/> 的内容> 部分.这将为页面上的任何链接添加前缀，如果出现此类问题，这应该可以防止您的本地页面被调用两次.
One easy way to tell is to temporarily put something like <base href="http://example.com" /> in your <head> section. That will prefix any links on the page, which should prevent your local page from being called twice if it is that sort of problem.
我还看到一些浏览器扩展在单独的请求中查询页面.我已经通过 Web 服务器通知程序 和 网络技术通知程序 适用于 Chrome 的扩展程序.尝试使用隐身"窗口或单独的浏览器，看看是否得到相同的结果.
I've also seen some browser extensions that query the page in a separate request. I've noticed this specifically with the Web Server Notifier and Web Technology Notifier extensions for Chrome. Try an "incognito" window or a separate browser and see if you get the same result.
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