cdn

How secure are CDNs for delivering jQuery?

由 ＊爱你＆永不变心＊ 提交于 2019-12-20 17:27:15
问题 We build sites that have a public (non-secured) area and secured (delivered over HTTPS) area and we use jQuery library. Recently I suggested we use Google CDN for jQuery delivery. Some of my colleagues expressed concerns in regards to security aspect of this way of delivering JavaScript libraries. For example, they mention the scenario where someone might hijack DNS server and then inject maliciously modified library, opening the door for different security attacks. Now, if hacker can inject

Symfony2 / Twig : Generate Alternate Absolute URL Path for use with CDN?

由 我只是一个虾纸丫 提交于 2019-12-20 10:04:54
问题 This stackoverflow solution almost answers my question. But I want to generate CDN urls in Twig to more than just resources. I'd like to generate them for dynamic content. So I don't think an Assetic tweak is the right area to be looking. For now, I can set CDN_url in parameters.ini and use that in my urls. My code would look like this : {{CDN_Url}}{{url('route',{'param1':'value'}} .. Code maintenance is one major reason I don't like this option. Then you could do things like check the route

Image paths in CSS to support CDN

由 送分小仙女□ 提交于 2019-12-20 09:58:03
问题 I am trying to deploy our images to a cdn. Currently the css has relative paths to images on our site. These paths will need to support the CDN image location. Does anyone have advice on how I can do this? Or if anyone has a good tutorial on deploying to a CDN. This is how I ended up accomplishing this. I used SASS - http://sass-lang.com/ I have a mixin called cdn.scss with content like $image_path: "/images/"; Import that mixin in the sass style @import "cdn.scss" Update image paths as such:

Resizing and optimizing images and loading them into CDN vs normaly linking them from the original CDN with default image size

由 有些话、适合烂在心里 提交于 2019-12-20 07:22:52
问题 We have a site on which we show various products from our providers. Providers provide us with images from their CDN's. The problem is that we have a smaller image frame than the original image sizes (image sizes also vary among providers), so we set the image sizes in HTML like this (all images are 200px by 200px): <img src="image1_Provider1.jpg" width="200" height="200" /> <img src="image2_Provider1.jpg" width="200" height="200" /> ... <img src="image37_Provider8.jpg" width="200" height=

CDN Cname Cross domain issue in jwplayer caption

由 与世无争的帅哥 提交于 2019-12-20 03:31:18
问题 I am using Jwplayer 6.8 and having my jwplayer setup in some server www.example.com.I am loading subtitles in vtt format from CDN d2cdnserver.cloudfront.com( cname - example.amazon.com, I am loading my subtitle using cname ) , It is throwing cross domain error. Source Link : Jwplayer crossdomain Issue I have to added response header in server end, in httpd.conf , php.ini and htaccess file but it does not seems to work. I was accessing my files through cname example.amazon.com, When I change

CDN基本工作过程

由 故事扮演 提交于 2019-12-20 00:31:09
看了一些介绍CDN的文章，感觉这篇是讲的最清楚的。 　　使用CDN会极大地简化网站的系统维护工作量，网站维护人员只需将网站内容注入CDN的系统，通过CDN部署在各个物理位置的服务器进行全网分发，就可以实现跨运营商、跨地域的用户覆盖。由于CDN将内容推送到网络边缘，大量的用户访问被分散在网络边缘，不再构成网站出口、互联互通点的资源挤占，也不再需要跨越长距离IP路由了。 　　CDN是如何工作的呢？让我们先看看没有CDN服务时，一个网站是如何向用户提供服务的。 　　今天我们看到的网站系统基本上都是基于B/S架构的。B/S架构，即Browser-Server（浏览器 服务器）架构，是对传统C/S架构的一种变化或者改进架构。在这种架构下，用户只需使用通用浏览器，主要业务逻辑在服务器端实现。B/S架构，主要是利用了不断成熟的WWW浏览器技术，结合浏览器的多种Script语言（VBScript、JavaScript等）和ActiveX等技术，在通用浏览器上实现了C/S架构下需要复杂的软件才能实现的强大功能。 　　用户通过浏览器等方式访问网站的过程如图1-2所示。 ①用户在自己的浏览器中输入要访问的网站域名。 ②浏览器向本地DNS服务器请求对该域名的解析。 ③本地DNS服务器中如果缓存有这个域名的解析结果，则直接响应用户的解析请求。 ④本地DNS服务器中如果没有关于这个域名的解析结果的缓存

Loading AjaxControlToolkit Scripts from Microsoft's CDN using ScriptManager/ToolkitManager

由 岁酱吖の 提交于 2019-12-19 21:44:20
问题 I know there is another question asking the same thing, but it hasn't gotten any attention for months now: https://stackoverflow.com/questions/3786088/how-to-force-ajax-control-toolkit-scripts-loading-from-cdn I've upgraded my website to .NET4, and I'm now using the scriptManager's EnableCDN="true" tag. My Ajax scripts are being referenced from the Microsoft CDN just how I expected, but I can't seem to get my AjaxControlToolkit scripts to load from the CDN. Instead they all load locally

Presigned S3 URLs with Cloudfront

由 青春壹個敷衍的年華 提交于 2019-12-19 10:15:12
问题 I want to append my pre-signed URL to a CloudFront URL to use instead any idea how to achieve this? 回答1: Use an Amazon CloudFront Signed URL instead of attempting to use an Amazon S3 pre-signed URL with CloudFront. See: Using Signed URLs - Amazon CloudFront 回答2: I find the question relevant, it matches my needs. I have files stored in S3 Singapore and external consumers in Europe. AWS default bandwidth quality is quite poor (takes several minutes to download a 50 MB file for quite a few of my

直播系统源码的主要作用

由 泪湿孤枕 提交于 2019-12-19 10:13:06
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 首先来看一下整个直播流程的几个关键步骤： 1、主播客户端，将本地采集的视频推送到CDN； 2、CDN对视频流进行缓存以及转发； 3、观众客户端，拉取CDN中缓存视频流进行播放；可以看到CDN在这里起到了关键的作用，2016也是一个CDN崛起的年代，网宿、快网、七牛、高升、蓝汛、观止云、腾讯云、百度云、阿里云等CDN纷纷表示对直播进行了支持，直播也逐渐成为了CDN的标配。另外，CDN直播中常用的流媒体协议包括RTMP，HLS，HTTP FLV等。RTMP（Real Time Messaging Protocol）是基于TCP的，由Adobe公司为Flash播放器和服务器之间音频、视频传输开发的开放协议。 HLS（HTTP Live Streaming）是基于HTTP的，是Apple公司开放的音视频传输协议。 HTTP FLV则是将RTMP封装在HTTP协议之上的，可以更好的穿透防火墙等。 直播源码的功能，优质的直播源码是可以进行二次开发的，而且也可以搭建以下功能： 1. 靓号:靓号就是一串相同的数字，比较好记，有利于满足粉丝的虚荣心、靓号有三位数的、四位数的、五位数的、六位数的。 2. 座驾：有小毛驴、魔法扫把、乌龟、飞马、火灵马、凌鹰 按月购买、主要应用在商城上（类似于秀场似的商城，主要购买装备之类的东西）

How to detect when one or more JS/CSS library fail to load (e.g. CDN)?

由 ﹥＞﹥吖頭↗ 提交于 2019-12-19 04:46:14
问题 Premise : I've found these two answers but I don't understand how I can sistematically apply it for many libraries: Detect and log when external JavaScript or CSS resources fail to load HTML if statement to load local JS/CSS upon CDN failure I've an Augular 1.x application which depends on several libraries, many of them hosted on CDN or external server. Unfortunately when the user is offline, the Internet connection doesn't work well or there is a (CDN) server problem, some libraries
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