public async Task Start(CommandContext ctx)
{
if (ctx.Channel.IsPrivate)
{
await ctx.TriggerTypingAsync();
var interactivity = ctx.Client.GetInteractivityModule();
var text = StaticRandom.NextString(StaticRandom.Next(10, 20), "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPRQSTUVWXYZ0123456789");
var font = new Font(SystemFonts.DefaultFont.FontFamily, StaticRandom.Next(8, 48), (FontStyle)StaticRandom.Next(16));
SizeF textSize;
using (var image = new Bitmap(1, 1))
using (var drawing = Graphics.FromImage(image))
{
textSize = drawing.MeasureString(text, font);
}
using (var image = new Bitmap((int)textSize.Width, (int)textSize.Height))
using (var drawing = Graphics.FromImage(image))
using (var brush = new SolidBrush(Color.Black))
using (var stream = new MemoryStream())
{
drawing.Clear(Color.White);
drawing.DrawString(text, font, brush, 0, 0);
image.Save(stream, ImageFormat.Png);
stream.Seek(0, SeekOrigin.Begin);
await ctx.RespondWithFileAsync(stream, "Captcha.png");
}
var response = await interactivity.WaitForMessageAsync(message => message.Author.Id == ctx.User.Id &&
message.Channel.IsPrivate, TimeSpan.FromSeconds(2.0));
await ctx.TriggerTypingAsync();
if (response == null)
{
await(await ctx.RespondAsync("Too late!")).CreateReactionAsync(DiscordEmoji.FromUnicode("⌛"));
return;
}
if (text.Equals(response.Message.Content, StringComparison.Ordinal))
{
await response.Message.CreateReactionAsync(DiscordEmoji.FromUnicode("🎉"));
await ctx.RespondAsync("You did it! The flag is Pycon_{{345y_0cr}}.");
}
else
{
await(await ctx.RespondAsync("You lost!")).CreateReactionAsync(DiscordEmoji.FromUnicode("😏"));
}
}
}
/// <summary>
/// Tests to make sure the that the requested error rate is achieved
/// when inserting random strings.
/// </summary>
public static void ErrorRateWithinExpectedBounds <T>(BaseBloomFilter <T> bf)
{
for (int i = 0; i < bf.ExpectedNumberOfElements; i++)
{
bf.Add(StaticRandom.NextString(10));
}
int falsePositives = 0;
for (int i = 0; i < bf.ExpectedNumberOfElements; i++)
{
if (bf.IsPresent(StaticRandom.NextString(5)))
{
falsePositives++;
}
}
Assert.LessOrEqual(falsePositives, (1.03d * ((double)bf.ExpectedNumberOfElements) * bf.ErrorRate));
}
public async Task Start(CommandContext ctx)
{
if (ctx.Channel.IsPrivate)
{
await ctx.TriggerTypingAsync();
var interactivity = ctx.Client.GetInteractivityModule();
var text = StaticRandom.NextString(StaticRandom.Next(6, 8), "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPRQSTUVWXYZ0123456789");
var fontIndex = StaticRandom.Next(-1, Fonts.Count);
using (var font = fontIndex == -1 ? null : new MemoryStream(Fonts[fontIndex]))
{
var asciiText = new AsciiArt(text, font == null ? null : new FIGletFont(font));
await ctx.RespondAsync($"```{asciiText}```");
}
var response = await interactivity.WaitForMessageAsync(message => message.Author.Id == ctx.User.Id &&
message.Channel.IsPrivate, TimeSpan.FromSeconds(1.0));
await ctx.TriggerTypingAsync();
if (response == null)
{
await(await ctx.RespondAsync("Too late!")).CreateReactionAsync(DiscordEmoji.FromUnicode("⌛"));
return;
}
if (text.Equals(response.Message.Content, StringComparison.Ordinal))
{
await response.Message.CreateReactionAsync(DiscordEmoji.FromUnicode("🎉"));
await ctx.RespondAsync("You did it! The flag is Pycon_{{45c11_M45t3r}}.");
}
else
{
await(await ctx.RespondAsync("You lost!")).CreateReactionAsync(DiscordEmoji.FromUnicode("😏"));
}
}
}
public static void TestThreadSafety()
{
int NUMBER_OF_THREADS = 5;
int NUMBER_OF_OPS = 100000;
List <Thread> threads = new List <Thread>();
ThreadStart threadDelegate = (ThreadStart) delegate()
{
Thread.Sleep(0);
byte[] buffer = new byte[1];
for (int i = 0; i < NUMBER_OF_OPS; i++)
{
StaticRandom.Next();
StaticRandom.Next(100);
StaticRandom.Next(10, 100);
StaticRandom.NextDouble();
StaticRandom.NextBytes(buffer);
StaticRandom.NextString(1, true, true);
}
};
for (int i = 0; i < NUMBER_OF_THREADS; i++)
{
threads.Add(new Thread(threadDelegate));
}
foreach (Thread t in threads)
{
t.Start();
}
foreach (Thread t in threads)
{
t.Join();
}
}