很多站点都是用了静态文件分离。我推荐一种处理静态文件分离的方式。 BundleExtensions.cs
public static class BundleExtensions { public static string Version = "1.0.0"; public static string ScriptsPath = "Cdn"; public static Bundle Production(this Bundle bundle, string cdn, string root, string minified, string full = "") { var transform = new ScriptsBundleTransform() { Version = Version, ScriptsPath = System.IO.Path.Combine("~/", ScriptsPath, root), Minified = minified, Full = full }; bundle.Transforms.Add(transform); bundle.CdnPath = cdn + "/" + root + "/" + string.Format("{0}?{1}", minified, Version); return bundle; } }
ScriptsBundleTransform.cs
public class ScriptsBundleTransform : IBundleTransform { public string ScriptsPath { get; set; } public string Version { get; set; } public string Minified { get; set; } public string Full { get; set; } public ScriptsBundleTransform() { } public ScriptsBundleTransform(string path, string version, string minified, string full) { ScriptsPath = path; Version = version; Minified = minified; Full = full; } public void Process(BundleContext context, BundleResponse response) { string scriptsRoot = context.HttpContext.Server.MapPath(ScriptsPath); if (!Directory.Exists(scriptsRoot)) Directory.CreateDirectory(scriptsRoot); // if minified file name specified... if (!string.IsNullOrEmpty(Minified)) { using (TextWriter writer = File.CreateText(Path.Combine(scriptsRoot, Minified))) { writer.Write(response.Content); } } // if full file name specified... if (!string.IsNullOrEmpty(Full)) { using (Stream writer = File.OpenWrite(Path.Combine(scriptsRoot, Full))) { foreach (var file in response.Files) { file.VirtualFile.Open().CopyTo(writer); } } } } }
BundleConfig.cs
public static void RegisterBundles(BundleCollection bundles) { bundles.UseCdn = true; BundleTable.EnableOptimizations = true; //制定压缩后的资源存储路径 BundleExtensions.ScriptsPath = "Resource"; //制定请求时代的后缀，为了刷新掉客户端的缓存 BundleExtensions.Version = "00001"; //CDN站点地址 const string ajaxCdnPath = "http://localhost/Cdn"; bundles.Add(new ScriptBundle("~/bundles/bootstrap") .IncludeFallback("$.fn.affix", "~/Resource/Scripts/common/transition.js", "~/Resource/Scripts/common/button.js", "~/Resource/Scripts/common/affix.js", "~/Resource/Scripts/common/tab.js", "~/Resource/Scripts/common/collapse.js", "~/Resource/Scripts/common/tooltip.js", "~/Resource/Scripts/common/respond.js") .Production(ajaxCdnPath, "Scripts", "bootstrap.mincdn.js", "bootstrap.src.js")); bundles.Add(new ScriptBundle("~/Content/bootstrap") .Include("~/Resource/Content/bootstrap.css") .Include("~/Resource/Content/common/button.css") .Include("~/Resource/Content/common/bootstrap-theme.css") .Production(ajaxCdnPath, "Content", "bootstrap.mincdn.css", "bootstrap.src.css")); }
这样的话就能生成 CDN 站点下的JS文件引用了
<script src="http://localhost/Cdn/Scripts/bootstrap.mincdn.js?00001"></script>
对了这里漏掉了一个地方，
http://localhost/Cdn站点需要你在IIS中指定到你站点的Resource下，不然访问不到你的JS文件。
但是如果CDN站点挂掉了怎么办，咱们继续：
SctiptsBundleExtensions.cs
public static class SctiptsBundleExtensions { public static ScriptBundle IncludeFallback(this ScriptBundle bundle, string cdnFallbackExpression, string virtualPath, params IItemTransform[] transforms) { bundle.CdnFallbackExpression = cdnFallbackExpression; bundle.Include(virtualPath, transforms); return bundle; } public static ScriptBundle IncludeFallback(this ScriptBundle bundle, string cdnFallbackExpression, params string[] virtualPaths) { bundle.CdnFallbackExpression = cdnFallbackExpression; bundle.Include(virtualPaths); return bundle; } }
bundles.Add(new ScriptBundle("~/bundles/jquery") .IncludeFallback("window.jQuery", "~/Resource/Scripts/common/jquery-{version}.js") .Production(ajaxCdnPath, "Scripts", "jquery.mincdn.js", "jquery.src.js"));
这样会生成如下的JS应用：
<script src="http://localhost/Cdn/Scripts/jquery.mincdn.js?00001"></script><script>(window.jQuery)||document.write('<script src="/dome/bundles/jquery"><//script>');</script>
这样的话当CDN站点挂掉了还是能够访问到JS文件的。
接下来CSS怎么处理呢：
StyleBundleExtensions.cs
public static class StyleBundleExtensions { /// <summary> /// Include a stylesheet to fallback to when external CdnPath does not load. /// </summary> /// <param name="bundle"></param> /// <param name="fallback">Virtual path to fallback stylesheet</param> /// <param name="className">Stylesheet class name applied to test DOM element</param> /// <param name="ruleName">Rule name to test when the class is applied ie. width</param> /// <param name="ruleValue">Value to test when the class is applied ie. 1px</param> /// <returns></returns> public static StyleBundle IncludeFallback(this StyleBundle bundle, string fallback, string className = null, string ruleName = null, string ruleValue = null) { if (String.IsNullOrEmpty(bundle.CdnPath)) { throw new Exception("CdnPath must be provided when specifying a fallback"); } if (VirtualPathUtility.IsAppRelative(bundle.CdnPath)) { bundle.CdnFallbackExpress(fallback); } else if (new[] { className, ruleName, ruleValue }.Any(String.IsNullOrEmpty)) { throw new Exception( "IncludeFallback for cross-domain CdnPath must provide values for parameters [className, ruleName, ruleValue]."); } else { bundle.CdnFallbackExpress(fallback, className, ruleName, ruleValue); } return bundle; } private static StyleBundle CdnFallbackExpress(this StyleBundle bundle, string fallback, string className = null, string ruleName = null, string ruleValue = null) { bundle.Include(fallback); fallback = VirtualPathUtility.ToAbsolute(fallback); bundle.CdnFallbackExpression = String.IsNullOrEmpty(className) ? String.Format(@"function() {{ var len = document.styleSheets.length; for (var i = 0; i < len; i++) {{ var sheet = document.styleSheets[i]; if (sheet.href.indexOf('{0}') !== -1) {{ var rules = sheet.rules || sheet.cssRules; if (rules.length <= 0) {{ document.write('<link href=""{1}"" rel=""stylesheet"" type=""text/css"" />'); }} }} }} return true; }}()", bundle.CdnPath, fallback) : String.Format(@"function() {{ var loadFallback, len = document.styleSheets.length; for (var i = 0; i < len; i++) {{ var sheet = document.styleSheets[i]; if (sheet.href.indexOf('{0}') !== -1) {{ var meta = document.createElement('meta'); meta.className = '{2}'; document.head.appendChild(meta); var value = window.getComputedStyle(meta).getPropertyValue('{3}'); document.head.removeChild(meta); if (value !== '{4}') {{ document.write('<link href=""{1}"" rel=""stylesheet"" type=""text/css"" />'); }} }} }} return true; }}()", bundle.CdnPath, fallback, className, ruleName, ruleValue); return bundle; } }
好吧后面的大家自己摸索吧：）上班了
很多代码是网上抄袭的，东拼西凑。