lmas

const WRITE_TIME = 10 * time.Second
const PING_TIME = 60 * time.Second
const PONG_TIME = PING_TIME + WRITE_TIME

func pingPong(conn *websocket.Conn) {
        ticker := time.NewTicker(PING_TIME)
        defer func() {
                ticker.Stop()
                conn.Close()

lmas

#!/bin/bash

# Generate a new private key of size 4096 (with no pass phrase)
openssl genrsa -out server-key.pem 4096

# Generate a self-signed cert using the key (valid for 10 years)
openssl req -new -x509 -key server-key.pem -out server-cert.pem -days 3650

# Inspect the new cert
openssl x509 -in server-cert.pem  -noout -text

lmas

// Source: https://github.com/mattn/go-sqlite3/pull/116

if err.(sqlite3.Error).Code == sqlite3.ErrConstraint {
    // clumsily compare err.Error() against strings to figure out what the heck happened...
}

// Additionally, the following is now possible:

if err.(sqlite3.Error).ExtendedCode == sqlite3.ErrConstraintUnique {
    // oh! my unique constraint failed?

lmas

package main

import (
        "fmt"
        "io"
        "os"

        "golang.org/x/crypto/ssh/terminal"
)

lmas

x, y = float
radians = atan2(y,x)
degrees = radians * (180 / pi)

lmas

Source: https://en.wikipedia.org/wiki/Circle#Equations

In an x–y Cartesian coordinate system, the circle with centre coordinates (a, b)
and radius r is the set of all points (x, y) such that:

x = a + r * cos t
y = b + r * sin t

where t is in the range 0 to 2π, interpreted geometrically as the angle that the
ray from (a, b) to (x, y) makes with the positive x-axis.

lmas

package genid

import (
	"crypto/sha512"
	"encoding/hex"
)

// NOTICE: DO NOT RELY ON THIS BEING SECURE!
// 16 hex chars = 64 entropy bits (in other words, worse than MD5 = 128 bits)
// but theoretically we should be good when using less than 10K ids?

lmas

// Copyright © 2016 Alex
//
// This program is free software: you can redistribute it and/or modify it under
// the terms of the GNU Affero General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option) any
// later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more

lmas

<a href="/delete/ITEM" onClick="return confirm('You sure you want to delete this item?');">Delete</a>

requires only vanilla js
shows a ok/cancel popup box with a msg
clicking ok makes the user continue to the link

lmas

package main

// Generate 16 bytes long IDs.
// 9 bytes time and 7 bytes random, and then base36 encoded for nice URL safety.
//
// With heavy inspiration from:
// https://github.com/oklog/ulid

import (
        "crypto/rand"