internal static async Task ExecuteProxyOperation(HttpContext context, string uri, ProxyOptions options = null)
{
try
{
var proxiedRequest = context.CreateProxiedHttpRequest(uri, options?.ShouldAddForwardedHeaders ?? true);
if (options?.BeforeSend != null)
{
await options.BeforeSend(context, proxiedRequest).ConfigureAwait(false);
}
var proxiedResponse = await context.SendProxiedHttpRequest(proxiedRequest).ConfigureAwait(false);
if (options?.AfterReceive != null)
{
await options.AfterReceive(context, proxiedResponse).ConfigureAwait(false);
}
await context.WriteProxiedHttpResponse(proxiedResponse).ConfigureAwait(false);
}
catch (Exception e)
{
if (options?.HandleFailure == null)
{
// If the failures are not caught, then write a generic response.
context.Response.StatusCode = 502;
await context.Response.WriteAsync($"Request could not be proxied.\n\n{e.Message}\n\n{e.StackTrace}.").ConfigureAwait(false);
return;
}
await options.HandleFailure(context, e).ConfigureAwait(false);
}
}
internal static async Task ExecuteHttpProxyOperationAsync(this HttpContext context, string uri, ProxyOptions options = null)
{
// If `true`, this proxy call has been intercepted.
if (options?.Intercept != null && await options.Intercept(context))
{
return;
}
var proxiedRequest = context.CreateProxiedHttpRequest(uri, options?.ShouldAddForwardedHeaders ?? true);
if (options?.BeforeSend != null)
{
await options.BeforeSend(context, proxiedRequest).ConfigureAwait(false);
}
var proxiedResponse = await context
.SendProxiedHttpRequestAsync(proxiedRequest, options?.HttpClientName ?? Helpers.HttpProxyClientName)
.ConfigureAwait(false);
if (options?.AfterReceive != null)
{
await options.AfterReceive(context, proxiedResponse).ConfigureAwait(false);
}
await context.WriteProxiedHttpResponseAsync(proxiedResponse).ConfigureAwait(false);
}
