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ASP.Net HTTP2 PushPromise 很慢

转载 作者:行者123 更新时间:2023-12-02 03:03:20 26 4
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我正在尝试使用“PushPromise”.NET 4.6.1 实现 Http2 推送服务器功能,为此我有一个带有 Razor 的“html 扩展”(我们没有实现 MVC,只使用 Razor 引擎构建页面).

    public static IHtmlString PushPromiseStylesheet(this HtmlHelper htmlHelper, string src, bool addDomElement = true)
{
var context = HttpContext.Current;
var path = System.Web.Optimization.Styles.Url(src).ToString();

var headers = new NameValueCollection { { "accept-encoding", context.Request.Headers["accept-encoding"] } };
context.Response.PushPromise(path, "GET", headers);

var styleElement = $"<link rel=\"preload\" href=\"{path}\" as=\"style\">";

return new HtmlString(addDomElement ? styleElement : String.Empty);
}

public static IHtmlString PushPromiseJavascript(this HtmlHelper htmlHelper, string src)
{
var context = HttpContext.Current;
var path = System.Web.Optimization.Scripts.Url(src).ToString();

var headers = new NameValueCollection { { "accept-encoding", context.Request.Headers["accept-encoding"] } };
context.Response.PushPromise(path,"GET",headers);

var javascriptElement = $"<link rel=\"preload\" href=\"{path}\" as=\"script\">";

return new HtmlString(javascriptElement);
}
public static IHtmlString PushPromiseImage(this HtmlHelper htmlHelper, string src, bool addDomElement = false)
{
var context = HttpContext.Current;
var path = System.Web.Optimization.Scripts.Url(src).ToString();

var headers = new NameValueCollection { { "accept-encoding", context.Request.Headers["accept-encoding"] } };
context.Response.PushPromise(path,"GET",headers);

var imgElement = $"<link rel=\"preload\" href=\"{path}\">";

return new HtmlString(addDomElement ? imgElement : String.Empty);
}

public static IHtmlString PushPromiseWebFont(this HtmlHelper htmlHelper, string src, string type = null)
{
var context = HttpContext.Current;
var path = System.Web.Optimization.Scripts.Url(src).ToString();
type = string.IsNullOrWhiteSpace(type) ? "font/woff2" : type;

var headers = new NameValueCollection { { "accept-encoding", context.Request.Headers["accept-encoding"] } };
context.Response.PushPromise(path, "GET", headers);

var fontElement = $"<link rel=\"preload\" href=\"{path}\" as=\"font\" type=\"{type}\"> ";

return new HtmlString(fontElement);
}

在页面的 中:

<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, height=device-height, initial-scale=1.0, user-scalable=0, minimum-scale=1.0, maximum-scale=1.0">
<title>@Page.Title</title>
@Html.PushPromiseStylesheet("~/css/app/fonts.css")
@Html.PushPromiseStylesheet("~/css/landing.base.css")
@Html.PushPromiseStylesheet("~/css/landing.style.css")
@Html.PushPromiseImage("/assets/img/bg-ofertas.jpg")
@Html.PushPromiseImage("/assets/img/landings/v2/iphone.png")
@Html.PushPromiseImage("/assets/img/landings/v2/ipad-new.png")
@Html.PushPromiseImage("/assets/img/landings/v2/macbook-new.png")

@Html.PushPromiseWebFont("/assets/fonts/CredimejoraIcons.woff2?miydpz")
@Html.PushPromiseWebFont("/assets/fonts/centrale_sans_regular_italic-webfont.woff2")
@Html.PushPromiseWebFont("/assets/fonts/centrale_sans_bold_italic-webfont.woff2")
@Html.PushPromiseWebFont("/assets/fonts/centrale_sans_regular-webfont.woff2")
@Html.PushPromiseWebFont("/assets/fonts/centrale_sans_bold-webfont.woff2")

@Html.PushPromiseJavascript("/assets/js/public/libs/jquery.inputmask.bundle-3.3.6.2.js")

我在“不使用 PushPromise”(credimejorademo) 的情况下托管了同一个项目,并且在另一个域中我实现了 PushPromise (aquituinmueble):

Demo(credimejorademo) | Demo2 (aquituinmueble)

https://www.webpagetest.org/video/compare.php?tests=170609_PD_e32f303e034aef3fef7140fef181a738,170609_FK_7d538ecdacf071cce320ad14bf97414c

最佳答案

我只想在这里提到几件事。首先,虽然这看起来有悖常理,但您最好不要插入“一切”。我看到的有限数量的测试(例如:https://www.smashingmagazine.com/2017/04/guide-http2-server-push/)表明仅推送 css 可能是提高性能的最佳方式,尽管它值得在单个站点的基础上尝试。

另一件事是,您实现 PushPromise 的方式意味着 IIS 仅在它已经开始处理页面后才收到该请求。即,您请求推送的时间或多或少与页面通过标准 .

希望这对您有所帮助。

关于ASP.Net HTTP2 PushPromise 很慢,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44464429/

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