private static async Task Invoke(FunctionHandler function, HttpContext context)
{
var funcHandler = function.GetType().GetMethod("Handle");
HttpMethodAttribute attr = (HttpMethodAttribute)funcHandler.GetCustomAttributes(
typeof(HttpMethodAttribute), true).FirstOrDefault();
string method = attr?.HttpMethods.FirstOrDefault() ?? "Post";
if (string.Compare(method, context.Request.Method, true) != 0)
{
context.Response.StatusCode = 405;
await context.Response.WriteAsync($"405 - {context.Request.Method} method allowed");
return;
}
try
{
var(status, text) = await function.Handle(context.Request);
context.Response.StatusCode = status;
if (!string.IsNullOrEmpty(text))
{
if (context.Request.ContentType.Contains("application/json"))
{
context.Response.Headers["Content-Type"] = "application/json";
}
else
{
context.Response.Headers["Content-Type"] = "plain/text";
}
await context.Response.WriteAsync(text);
}
}
catch (NotImplementedException nie)
{
context.Response.StatusCode = 501;
await context.Response.WriteAsync(nie.ToString());
}
catch (Exception ex)
{
context.Response.StatusCode = 500;
await context.Response.WriteAsync(ex.ToString());
}
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env, FunctionHandler function)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.Map("/", async context =>
{
await Invoke(function, context);
});
});
}