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{ pkgs ? import <nixpkgs> }:

let
  scriptScreenOCR = pkgs.writeScript "screenocr" ''#!/bin/sh
    ${pkgs.maim}/bin/maim -s | ${pkgs.tesseract4}/bin/tesseract stdin stdout -l "eng+equ" --psm 1 --oem 3 |  ${pkgs.xsel}/bin/xsel -i -b 
    ${pkgs.libnotify}/bin/notify-send "OCR ready!"
  '';
  scriptScreenOCRWayland = pkgs.writeScript "screenocr" ''#!/bin/sh
    ${pkgs.grim}/bin/grim -t png -g "$(slurp)" - | ${pkgs.tesseract4}/bin/tesseract tesseract stdin stdout -l "eng+equ" --psm 1 --oem 3 | ${pkgs.wl-clipboard}/bin/wl-copy
    ${pkgs.libnotify}/bin/notify-send "OCR ready!"

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The Happy Website

Phase 1 - What the hell is this?

A website is presented, where you can choose from a list of options. When changing the options, a request is sent to the backend server which will give you a reply. One of the options is XXE, which will tell you that you cannot do XXE on JSON.

Inspecting the source of the website, it is shown that it encodes using JSON to communicate with the backend, which includes setting Content-Type: application/json, with a format of {"message": "Cola"}. Instead it can be set to Content-Type: application/xml, <message>Cola</message>.

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function hook_okhttp3() {
    Java.perform(function() {
        var ByteString = Java.use("com.android.okhttp.okio.ByteString");
        var Buffer = Java.use('okio.Buffer');         var Interceptor = Java.use("okhttp3.Interceptor");
        var MyInterceptor = Java.registerClass({
            name: "okhttp3.MyInterceptor",
            implements: [Interceptor],
            methods: {
                intercept: function(chain) {
                    var request = chain.request();

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Pure Nix Minecraft launchers

1. Download .nix file

2. Run:

   $ nix run -f all-minecrafts.nix versions.v1_8_9.client -c minecraft

3. Enjoy (…​power of fixed-output derivations)!

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{ config, pkgs, lib, ... }:

with lib;

let
  verifiedNetfilter = { text, modules ? [ ] }:
    let
      file = pkgs.writeText "netfilter" text;
      vmTools = pkgs.vmTools.override {
        rootModules =

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#! /usr/bin/env nix-shell
#! nix-shell -i perl -p perl nixUnstable.perl-bindings

# pipe using stdin, to this script, where each line has the format
# <algo> <hash> <name>
# sha256 0q6gwd9pqh41f6j5p9jl92aji4p8kx9inffpha93d7jc3ndsfq6q rematch2_2.1.2.tar.gz

use strict;
use Nix::Store;

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let
  sources = import ./sources.nix;
in import sources.nixus {
  specialArgs.sources = sources;
} ({ config, ... }: {
  defaults = { lib, name, ... }: {
    configuration = {
      config._module.args.sources = sources;
      config.networking.hostName = lib.mkDefault name;
    };

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{
systemd.timers."matrix-synapse-janitor" = {
    wantedBy = [ "timers.target" ];
      timerConfig = {
        OnBootSec = "2h";
        OnUnitActiveSec = "2h";
        Unit = config.systemd.services."matrix-synapse-janitor".name;
      };
  };
  

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module Main exposing (main)

import Basics
import Browser
import Browser.Events
import Colors
import Element as E exposing (Element)
import Element.Background as Background
import Element.Font as Font
import Html exposing (Html, button, div, text)