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I'm using Google hosted jQuery in my webapp (//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js) As part of bug diagnostics I have a window.onerror handler which catches any errors I'm not catching locally and lets the server know about them. So far so good, but... sometimes i get errors like these: "Script error.","Error loading script","Unexpected token <" My assumption is that the Google CDN is blocked in these cases (for whatever reason). I do have a local fallback for jQuery, that I'm fairly sure is working well, but I would like to find out what's being returned so that I can

Is it possible to generate pre-signed URLs for CDNs (i.e., CloudFront?), or can I append pre-signed URL parameters to a CloudFront URL to use instead? Example: string url = amazonS3Client.generatePresignedUrl(generatePresignedUrlRequest); returns: url = "https://bucket-name.s3.amazonaws.com/file.txt?AWSAccessKeyId=XXXXXXXXXXXXXXXXXXXX&Expires=1111111111&Signature=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" Can I take the URL parameters and append to corresponding CloudFront URL: https://00000000000000.cloudfront.net/file.txt?AWSAccessKeyId=XXXXXXXXXXXXXXXXXXXX&Expires=1111111111&Signature

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am quite new to dojo world. Using dojo with google's CDN is well and Fine. But while using dijit just dojo.require() does not work. Where can I find the default CSS Themes from CDN ?? and another question out of quorisity: Would the the CSS configuration for dijit work for dojox too ?? 回答1: The CSS can be found on Google's CDN. I've used it in a page or two. Here's some CSS link tags. <link rel="stylesheet" type="text/css" href="http://ajax.googleapis.com/ajax/libs/dojo/1.4/dojo/resources/dojo.css"> <link rel="stylesheet" type="text/css"

I have a large amount of static/rarely changing data in JSON format. To improve my ASP.NET MVC application performance, I would like to move them to a CDN (Amazon Cloud Front). However when I do that, the cross domain policy kicks in and jQuery makes a HTTP OPTIONS method call instead of HTTP GET and Amazon denies the requst with "403 Forbidden" response. JSONP might be a way around this but since the files are static and on a CDN there is no way to wrap the JSON in a custom function. However I can recreate them wrapped with a known function name. For example: {"LineDetails":{"LineNo":"3109",

本人以网络技术出身，近两年接触CDN网络，处理了一些CDN方面的网络问题，大多数以运营商丢包，延迟抖动为主，也处理一些硬件故障，比如机械硬盘的读写io测试，内存条兼容性测试，服务器IPMI规划等。这篇文章打算把自己对运营商对资源请求的劫持写下来，这个其实不是很罕见的事例，也不是网上找不到解决办法，也不是无法理解的尖钻技术，只是罗列一下自己的所知。 CDN网络访问拓扑 既然提到了CDN网络，那就顺带提一句吧。 废话不多说，先上图。 　　这回可以开始废话了吧？：大体的工作逻辑有用户的访问、localdns的解析、CDN资源调度、资源应答。 如果按照这种方式去运营CDN 架构 ，估计CDN行业早就倒闭了，先不说资源调度的好坏，如果有恶意的攻击流量，整个CDN系统就直接可以GG思密达了。 运营商劫持概述 劫持的目的 其实目的很简单，关于运营商劫持，一般运营商也不是无故做劫持，毕竟他们维护服务器，维护相应设备（比如分光器、分流器）也需要成本，运营商主要劫持出省流量，对于“小”运营商来说他们有省内流量考核，跨省访问会增加成本输出，集团控制出省流量，所以劫持往往发生在省间传输上。其次所有运营商都可能会做劫持，目的是减少省骨干网络链路的负载压力，尽可能的减少中继链路、远距离骨干链路，负载能力弱的链路上的流量，则会出现劫持的现象。 劫持的方法 运营商/或者小区宽带会有分光器设备