public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
{
var request = this.ViewContext.HttpContext.Request;
var result = await Prerenderer.RenderToString(
applicationBasePath : this.applicationBasePath,
nodeServices : this.nodeServices,
bootModule : new JavaScriptModuleExport(this.ModuleName)
{
exportName = this.ExportName,
webpackConfig = this.WebpackConfigPath
},
requestAbsoluteUrl : UriHelper.GetEncodedUrl(request),
requestPathAndQuery : request.Path + request.QueryString.Value);
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.
if (result.Globals != null)
{
var stringBuilder = new StringBuilder();
foreach (var property in result.Globals.Properties())
{
stringBuilder.AppendFormat("window.{0} = {1};",
property.Name,
property.Value.ToString(Formatting.None));
}
if (stringBuilder.Length > 0)
{
output.PostElement.SetHtmlContent($"<script>{ stringBuilder.ToString() }</script>");
}
}
}
public Task <RenderToStringResult> RenderToString(
string moduleName,
string exportName = null,
object customDataParameter = null,
int timeoutMilliseconds = default(int))
{
return(Prerenderer.RenderToString(
_applicationBasePath,
_nodeServices,
_applicationStoppingToken,
new JavaScriptModuleExport(moduleName)
{
ExportName = exportName
},
_httpContextAccessor.HttpContext,
customDataParameter,
timeoutMilliseconds));
}
/// <summary>
/// Executes the tag helper to perform server-side prerendering.
/// </summary>
/// <param name="context">The <see cref="TagHelperContext"/>.</param>
/// <param name="output">The <see cref="TagHelperOutput"/>.</param>
/// <returns>A <see cref="Task"/> representing the operation.</returns>
public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
{
var result = await Prerenderer.RenderToString(
_applicationBasePath,
_nodeServices,
_applicationStoppingToken,
new JavaScriptModuleExport(ModuleName)
{
ExportName = ExportName
},
ViewContext.HttpContext,
CustomDataParameter,
TimeoutMillisecondsParameter);
if (!string.IsNullOrEmpty(result.RedirectUrl))
{
var permanentRedirect = result.StatusCode == 301;
// It's a redirection
ViewContext.HttpContext.Response.Redirect(result.RedirectUrl, permanentRedirect);
return;
}
if (result.StatusCode.HasValue)
{
ViewContext.HttpContext.Response.StatusCode = result.StatusCode.Value;
}
// It's some HTML to inject
output.Content.SetHtmlContent(result.Html);
// Also attach any specified globals to the 'window' object. This is useful for transferring
// general state between server and client.
var globalsScript = result.CreateGlobalsAssignmentScript();
if (!string.IsNullOrEmpty(globalsScript))
{
output.PostElement.SetHtmlContent($"<script>{globalsScript}</script>");
}
}