// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
MnistImageStoreOptions options = Configuration.GetSection(mnistImageStoreSettingsKeyName).Get <MnistImageStoreOptions>();
if (options.ShowDeveloperExceptionPage == true)
{
app.UseDeveloperExceptionPage();
}
else
{
SetupExceptionHandler(app);
}
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
/// <summary>
/// Sets up objects storing and indexing MNIST image data, and adds them to the specified services collection.
/// </summary>
/// <param name="services">The services collection to add the objects to.</param>
protected void SetupMnistImageDataStructures(IServiceCollection services)
{
MnistImageStoreOptions options = Configuration.GetSection(mnistImageStoreSettingsKeyName).Get <MnistImageStoreOptions>();
// Read the MNIST data
var mnistImageReader = new MnistImageNativeFormatFileReader(options.MnistImageDataFileUri, options.MnistLabelFileUri);
List <MnistImage> allMnistImages = null;
// This stores the images grouped by label.
MnistImageLabelIndex mnistImagesByLabel = null;
try
{
IEnumerable <MnistImage> allImages = mnistImageReader.Read();
allMnistImages = new List <MnistImage>(allImages);
allImages = mnistImageReader.Read();
mnistImagesByLabel = new MnistImageLabelIndex(allMnistImages);
}
catch (Exception e)
{
throw new Exception("Failed to read MNIST images.", e);
}
services.AddSingleton <List <MnistImage> >(allMnistImages);
services.AddSingleton <MnistImageLabelIndex>(mnistImagesByLabel);
}