public Task <RenderToStringResult> RenderToString(
string moduleName,
string exportName = null,
object customDataParameter = null,
int timeoutMilliseconds = default(int))
{
return(Prerenderer.RenderToString(
_applicationBasePath,
_nodeServices,
_applicationStoppingToken,
new JavaScriptModuleExport(moduleName)
{
ExportName = exportName
},
_httpContextAccessor.HttpContext,
customDataParameter,
timeoutMilliseconds));
}
/// <summary>
/// Executes the tag helper to perform server-side prerendering.
/// </summary>
/// <param name="context">The <see cref="TagHelperContext"/>.</param>
/// <param name="output">The <see cref="TagHelperOutput"/>.</param>
/// <returns>A <see cref="Task"/> representing the operation.</returns>
public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
{
var result = await Prerenderer.RenderToString(
_applicationBasePath,
_nodeServices,
_applicationStoppingToken,
new JavaScriptModuleExport(ModuleName)
{
ExportName = ExportName
},
ViewContext.HttpContext,
CustomDataParameter,
TimeoutMillisecondsParameter);
if (!string.IsNullOrEmpty(result.RedirectUrl))
{
// It's a redirection
ViewContext.HttpContext.Response.Redirect(result.RedirectUrl);
return;
}
if (result.StatusCode.HasValue)
{
ViewContext.HttpContext.Response.StatusCode = result.StatusCode.Value;
}
// It's some HTML to inject
output.Content.SetHtmlContent(result.Html);
// Also attach any specified globals to the 'window' object. This is useful for transferring
// general state between server and client.
var globalsScript = result.CreateGlobalsAssignmentScript();
if (!string.IsNullOrEmpty(globalsScript))
{
output.PostElement.SetHtmlContent($"<script>{globalsScript}</script>");
}
}
