新 RSS 条目的不引人注目的实时通知
首先，我为什么问：既然 StackOverflow 上的声誉点具有真正的价值（你可以通过提供赏金将它们花在该死的好答案上），我想监视我可能能够回答的问题并抓住它们！ （另外，其他人实时回答我的问题这一事实使得 StackOverflow 非常方便，所以如果能给予回应就好了。）
将此作为一个更普遍的问题而不是特定于 StackOverflow 来问
- ： RSS feed 与轮询和抓取？
- 以不太分散注意力的方式显示通知的好方法是什么（例如 Mac 上的 Growl）？ （如果它确实让人分心，它也应该很容易打开和关闭。）
（或者，对于 StackOverflow 上瘾者来说，您如何设置来解决新问题？您能否将其推广到实时监控其他网络内容？）
First, why I ask: Now that reputation points on StackOverflow have real value (you can spend them on damn good answers by offering bounties) I'd like to monitor questions I might be able to answer and pounce on them! (Also the fact that others answer my questions in real time makes StackOverflow amazingly handy, so it would be nice to reciprocate.)
To ask this as a more general question, not specific to StackOverflow:
- What kind of delay will there typically be in an RSS feed vs polling and scraping?
- What's a good way to display the notifications in a not-too-distracting way, such as Growl on Mac? (It should also be easy to turn on and off, if it does get too distracting.)
(Or, for StackOverflow addicts, what's your setup for pouncing on new questions and can you generalize it for monitoring other web content in real time?)
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这取决于网站对其 RSS 源使用哪种缓存。 在 SO 上，大多数提要没有明显的延迟，但您需要每分钟左右轮询一次提要。 程序无法自动从站点本身获取通知，除非相关站点上存在某种 ping 服务。
That depends on what sort of caching the site uses for its RSS feed. On SO there is no noticeable delay on most feeds, but you will need to poll the feed every minute or so. A program can not automagically get notifications from the site itself unless there is some sort of ping service on site in question.
您可以使用 notify.me 上的服务作为 RSS 阅读器的稍微更显眼的版本。 它监视提要并向您发送电子邮件警报。 但使用基本的 StackOverflow 设置，即使只有“赏金问题”提要，您也可能会被通知淹没，因为每天都有很多赏金优惠。
因此，也许可以将其与 Yahoo Pipes 结合起来，并根据仅包含您的主题的信息构建一个过滤子集有兴趣回答一下。 SO RSS 提要中的每个条目都有一个“类别”节点，其中包含其所有标签，管道将允许您基于这些类别构建 AND / OR / NOT 表达式。 （而且我不知道可能会暴露哪些其他属性？）
即使您不希望通过电子邮件收到弹出通知，Pipes 解决方案也可以让您监控 RSS 提要中想要的内容。 不过，我猜你会看到大约一两个小时的延迟。
You could use the service at notify.me as a slightly more obtrusive version of an RSS reader. It monitors a feed and sends you e-mail alerts. But with the basic StackOverflow setup you'd probably be overwhelmed by notifications even if there were just a "questions with bounties" feed, because there are many bounty offers per day.
So maybe combine that with Yahoo Pipes and build a filtered subset based on the information that only contain subjects you're interested in answering. Each entry in the SO RSS feed has a "category" node which contains all of its tags, and Pipes would allow you to build AND / OR / NOT expressions based on those categories. (and I don't know what other attributes might be exposed?)
Even if you don't want the pop-up notifications you get with e-mail, the Pipes solution will let you monitor what you want in an RSS feed. I'd guess that you'd see about an hour or two of lag, though.
关于问题#1：
让它尽可能短。 如果您用来正确获取提要的任何内容都支持 ETags 和 HTTP Cache-Control 你应该没问题。 如果您同时控制服务器和客户端，也许可以查看 Delta Encoding (RFC 3229) 将是一个好主意。
In regards to question #1:
Make it as short as you like. If whatever you are using to get the feed correctly supports ETags and HTTP Cache-Control you should be fine. If you control both the server and the client, maybe checking out Delta Encoding (RFC 3229) would be a good idea.
屠宰一个开源阅读器来打开/闪烁你的滚动锁 LED。
Butcher an open source reader to turn on/blink your scroll lock LED.
您可以使用 tcp 样式的退避来处理 feed 轮询。 有人发帖越频繁，您投票的次数就越多。
谷歌阅读器就是这样做的； 我在博客上发布的内容越多，每篇文章显示的速度就越快。
you could use a tcp-style backoff to handle feed polling. The more often someone posts, the more often you poll.
Google reader does this; the more I post on my blog, the faster each post shows up.
为此，我正在尝试使用 Feed Notifier。
http://www.feednotifier.com/
我本身仍然无法猛扑，因为我我的弹出窗口会晚几分钟。 那时，他们已经有 30 位观众、3 个答案等。
所以我很想看到第二个问题的答案......
I'm experimenting with Feed Notifier for this purpose.
http://www.feednotifier.com/
I'm still not able to pounce, per se, as I will get my popups several minutes late. At that point, they've already got 30 viewers, 3 answers, etc.
So I'd love to see the answer to secondary question....
Mac 版 Vienna RSS Reader 显示 Growl 通知，但仅显示“X 新消息”形式，而不显示非常实时。
The Vienna RSS Reader for Mac shows Growl notifications, but only of the form "X new messages" and not very realtime.
VibeFire 是一个不错的解决方案。 它会为您读取 RSS 提要并弹出通知（如果您不阅读，通知将自动消失）。 http://vibefire.com 如果您有兴趣。 虽然它是一个捆绑安装程序，但它不会安装任何您不接受的内容。
VibeFire is a decent solution for this. It'll read RSS feeds and pop up notifications (that will automatically go away if you don't read them) for you. http://vibefire.com if you're interested. Its a bundled installer though, but it won't install anything you don't accept.