private static async Task ServePrerenderResult(HttpContext context, RenderToStringResult renderResult)
{
context.Response.Clear();
if (!string.IsNullOrEmpty(renderResult.RedirectUrl))
{
var permanentRedirect = renderResult.StatusCode.GetValueOrDefault() == 301;
context.Response.Redirect(renderResult.RedirectUrl, permanentRedirect);
}
else
{
// The Globals property exists for back-compatibility but is meaningless
// for prerendering that returns complete HTML pages
if (renderResult.Globals != null)
{
throw new InvalidOperationException($"{nameof(renderResult.Globals)} is not " +
$"supported when prerendering via {nameof(UseSpaPrerendering)}(). Instead, " +
$"your prerendering logic should return a complete HTML page, in which you " +
$"embed any information you wish to return to the client.");
}
if (renderResult.StatusCode.HasValue)
{
context.Response.StatusCode = renderResult.StatusCode.Value;
}
context.Response.ContentType = "text/html";
await context.Response.WriteAsync(renderResult.Html);
}
}
public void HandlesNullGlobals()
{
// Arrange
#pragma warning disable CS0618 // Type or member is obsolete
var renderToStringResult = new RenderToStringResult();
#pragma warning restore CS0618 // Type or member is obsolete
renderToStringResult.Globals = null;
// Act
var actualScript = renderToStringResult.CreateGlobalsAssignmentScript();
// Assert
Assert.Equal(string.Empty, actualScript);
}
public static int?GetStatusCodeFromMeta(this RenderToStringResult renderToStringResult)
{
// --- Parse the meta description
var meta = renderToStringResult.Globals.Descendants().FirstOrDefault(o => o.Path == "meta").First.ToString();
var statusCodeMatch = Regex.Match(meta, "property=\"statusCode\" content\\s*=\\s*(?:\"(?<1>[^\"]*)\"|(?<1>\\S+))");
var statusCode = statusCodeMatch.Groups[1].Value;
if (string.IsNullOrEmpty(statusCode))
{
return(null);
}
return(Convert.ToInt32(statusCodeMatch.Groups[1].Value));
}
public void HandlesGlobalsWithCorrectStringEncoding()
{
// Arrange
#pragma warning disable CS0618 // Type or member is obsolete
var renderToStringResult = new RenderToStringResult();
#pragma warning restore CS0618 // Type or member is obsolete
renderToStringResult.Globals = ToJObject(new Dictionary <string, object>
{
{ "Va<l'u\"e", "</tag>\"'}\u260E" }
});
// Act
var actualScript = renderToStringResult.CreateGlobalsAssignmentScript();
// Assert
var expectedScript = @"window[""Va\u003Cl\u0027u\u0022e""] = JSON.parse(""\u0022\u003C/tag\u003E\\\u0022\u0027}\u260E\u0022"");";
Assert.Equal(expectedScript, actualScript);
}
private static async Task ApplyRenderResult(HttpContext context, RenderToStringResult renderResult)
{
if (!string.IsNullOrEmpty(renderResult.RedirectUrl))
{
context.Response.Redirect(renderResult.RedirectUrl);
}
else
{
// The Globals property exists for back-compatibility but is meaningless
// for prerendering that returns complete HTML pages
if (renderResult.Globals != null)
{
throw new Exception($"{nameof(renderResult.Globals)} is not supported when prerendering via {nameof(UseSpaPrerendering)}(). Instead, your prerendering logic should return a complete HTML page, in which you embed any information you wish to return to the client.");
}
context.Response.ContentType = "text/html";
await context.Response.WriteAsync(renderResult.Html);
}
}
public void HandlesGlobalsWithMultipleProperties()
{
// Arrange
#pragma warning disable CS0618 // Type or member is obsolete
var renderToStringResult = new RenderToStringResult();
#pragma warning restore CS0618 // Type or member is obsolete
renderToStringResult.Globals = ToJObject(new
{
FirstProperty = "first value",
SecondProperty = new[] { "Array entry 0", "Array entry 1" }
});
// Act
var actualScript = renderToStringResult.CreateGlobalsAssignmentScript();
// Assert
var expectedScript = @"window[""FirstProperty""] = JSON.parse(""\u0022first value\u0022"");" +
@"window[""SecondProperty""] = JSON.parse(""[\u0022Array entry 0\u0022,\u0022Array entry 1\u0022]"");";
Assert.Equal(expectedScript, actualScript);
}
public async Task <IActionResult> Index([FromServices] ISpaPrerenderer prerenderer, [FromServices] IMemoryCache cache)
{
IHttpRequestFeature requestFeature = this.Request.HttpContext.Features.Get <IHttpRequestFeature>();
string unencodedPathAndQuery = requestFeature.RawTarget;
RenderToStringResult prerenderResult = await cache.GetOrCreateAsync(unencodedPathAndQuery, entry =>
{
entry.AbsoluteExpirationRelativeToNow = TimeSpan.FromDays(10);
entry.SlidingExpiration = TimeSpan.FromDays(3);
return(prerenderer.RenderToString("angular/dist-server/server", customDataParameter: new { request = this.Request.AbstractHttpContextRequestInfo() }));
});
this.ViewData["SpaHtml"] = prerenderResult.Html;
this.ViewData["Title"] = prerenderResult.Globals["title"];
this.ViewData["Scripts"] = prerenderResult.Globals["scripts"];
this.ViewData["Styles"] = prerenderResult.Globals["styles"];
this.ViewData["Meta"] = prerenderResult.Globals["meta"];
this.ViewData["Links"] = prerenderResult.Globals["links"];
this.ViewData["TransferData"] = prerenderResult.Globals["transferData"];
return(View());
}
