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Source: https://web.archive.org/web/20141216073338/https://gkbrk.com/blog/read?name=reverse_engineering_the_speedtest_net_protocol Author: Gökberk Yaltıraklı

Reverse Engineering the Speedtest.net Protocol

After finishing my command line speed tester written in Rust, I didn't have a proper blog to document this process. A few days ago I wrapped up a simple blogging script in Python so hopefully it works good enough to explain how everything works.

By now I have already figured out the whole protocol for performing a speed test but I will write all the steps that I took so you can learn how to reverse engineer a simple protocol.

The code that I wrote can be found at https://github.com/gkbrk/speedtest-rust.

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負荷の管理

• 100%の時間 利用可能なサービスはない
  • 配慮のないクライアント
  • 50倍の要求
    • （訳注: 上記2つはPokemon Goのことでもある）
  • スラフィックのスパイク
  • 海底ケーブルの切断
• 私達のサービスに依存するユーザーがいる

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# This hosts file is brought to you by Dan Pollock and can be found at
# http://someonewhocares.org/hosts/
# You are free to copy and distribute this file for non-commercial uses,
# as long the original URL and attribution is included.

#<localhost>
127.0.0.1	localhost
127.0.0.1	localhost.localdomain
255.255.255.255	broadcasthost
::1		localhost

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codecov:
  token: uuid  # Your private repository token
  url: "http"  # for Codecov Enterprise customers
  slug: "owner/repo"  # for Codecov Enterprise customers
  branch: master  # override the default branch
  bot: username  # set user whom will be the consumer of oauth requests
  ci:  # Custom CI domains if Codecov does not identify them automatically
    - ci.domain.com
    - !provider  # ignore these providers when checking if CI passed
                 # ex. You may test on Travis, Circle, and AppVeyor, but only need

zchee

package cgroup

import "os"
import "syscall"
import "io/ioutil"
import "strconv"
import "os/exec"
import "strings"
import "errors"

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<!-- iOS 10, macOS Sierra, and friends bring a new logging subsystem that's
supposed to scale from the kernel, up to frameworks, and up to apps. It defaults
to a more regimented, privacy-focused approach that large apps and complex
systems need.

It, along with Activity Tracing introduced in iOS 8 and macOS Yosemite and the
Console app in macOS Sierra, hope to help you graduate from caveman debugging to

zchee

package main

import (
	"go/ast"
	"go/parser"
	"go/token"
	"strconv"
)

// 实现一个只支持int,只支持加法,函数只有println,只支持一个参数的Go语言子集....

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class MuslCross < Formula
  desc "Linux cross compilers based on musl libc"
  homepage "https://github.com/richfelker/musl-cross-make"
  head "https://github.com/richfelker/musl-cross-make.git"

  bottle do
    cellar :any_skip_relocation
  end

  option "with-arm-hf", "Build cross-compilers targeting arm-linux-musleabihf"

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/* gcc ideviceenterrecovery.c -o ideviceenterrecovery -limobiledevice */
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>

#include <libimobiledevice/libimobiledevice.h>
#include <libimobiledevice/lockdown.h>

static char *udid = NULL;
int main()

zchee

diff --git a/libguile/stime.c b/libguile/stime.c
index f430ca4..8b810a7 100644
--- a/libguile/stime.c
+++ b/libguile/stime.c
@@ -834,6 +834,10 @@ scm_init_stime()
 
 #ifdef HAVE_POSIX_CPUTIME
   {
+#ifdef __APPLE__
+    if (clock_gettime (CLOCK_PROCESS_CPUTIME_ID, &posix_run_time_base) == 0)