private static Dictionary <string, NgProxy> CreateProxiesAfterNgStarted(Dictionary <string, NgProxyOptions> pathPrefixToProxyOptionsMap)
{
// Do not assign an NgProxy until the Ng server is available.
var pathPrefixToProxyMap = pathPrefixToProxyOptionsMap.Keys.ToDictionary(i => i, i => (NgProxy)null);
// Create a proxy for each Ng app
foreach (var item in pathPrefixToProxyOptionsMap)
{
var pathPrefix = item.Key;
var proxyOptions = item.Value;
// Wait until the Ng server has started.
Task.Factory.StartNew(async() =>
{
do
{
await Task.Delay(TimeSpan.FromSeconds(2));
}while (IsPortAvailable(proxyOptions.Port));
var proxy = new NgProxy(proxyOptions);
// From now on we can proxy requests.
pathPrefixToProxyMap[pathPrefix] = proxy;
}
);
}
return(pathPrefixToProxyMap);
}
/// <summary>
/// Ignore the request Path for Angular CLI versions prior to 1.4.
/// </summary>
/// <param name="context"></param>
/// <param name="proxy"></param>
/// <returns></returns>
private static async Task CallProxyToPathRoot(HttpContext context, NgProxy proxy)
{
var requestPath = context.Request.Path;
try
{
if (requestPath.HasValue)
{
var lastSeparatorIndex = requestPath.Value.LastIndexOf('/');
// If the slash is at the start, keep the path as is.
if (lastSeparatorIndex > 0)
{
var proxyPath = requestPath.Value.Substring(lastSeparatorIndex);
context.Request.Path = new PathString(proxyPath);
}
}
// Call the Ng server
await proxy.HandleRequest(context);
}
finally
{
context.Request.Path = requestPath;
}
}
