fast-bandwidth-calculator.git

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David Blume

David Blume commited on 2019-10-10 22:35:14
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LICENSE.txt
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+The MIT License (MIT)
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+
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+Copyright (c) 2019 David Blume
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+
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+Permission is hereby granted, free of charge, to any person obtaining a copy
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+of this software and associated documentation files (the "Software"), to deal
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+in the Software without restriction, including without limitation the rights
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+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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+copies of the Software, and to permit persons to whom the Software is
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+furnished to do so, subject to the following conditions:
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+
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+The above copyright notice and this permission notice shall be included in all
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+copies or substantial portions of the Software.
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+
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+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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+SOFTWARE.
README.md
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+[![License](https://img.shields.io/badge/license-MIT_license-blue.svg)](https://raw.githubusercontent.com/dblume/md-reader/master/LICENSE.txt)
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+![bash](https://img.shields.io/badge/bash-4.2-blue.svg)
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+
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+## A Command-line Bandwidth Calculator
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+
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+With fast.sh, you can issue a Unix command from the terminal to calculate
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+download bandwidth from fast.com. For example:
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+
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+    $ fast.sh
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+    # Bytes Cur. rate   Avg. Rate
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+    ------- ----------- -----------
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+    1.22GiB [31.1MiB/s] [31.1MiB/s]
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+
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+## Credit
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+
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+The original implementation comes from Tiksi's
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+[one-liner at Hacker News](https://news.ycombinator.com/item?id=12259331). I just
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+added some whitespace and made some adjustments that made it more flexible and
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+easier for me to read and maintain.
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+
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+## Requirements
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+
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+The script requires these two handy modules:
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+
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+1. **[jq](https://stedolan.github.io/jq/)**: A JSON parser.
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+2. **[pv](http://www.ivarch.com/programs/pv.shtml)**: ([mirror](https://github.com/icetee/pv)) A pipe viewer.
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+
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+## Is it any good?
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+
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+[Yes](https://news.ycombinator.com/item?id=3067434).
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+
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+## Licence
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+
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+This software uses the [MIT license](http://git.dlma.com/fast-bandwidth-calculator.git/blob/master/LICENSE.txt).
fast.sh
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+#!/usr/bin/env bash
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+# Adapted from the one-liner at https://news.ycombinator.com/item?id=12259331
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+set -eu -o pipefail
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+
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+if ! command -v pv >/dev/null; then
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+    echo >&2 "Pipe viewer, pv, is required. Please install pv with your package manager."
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+    exit 1
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+fi
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+
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+if ! command -v jq >/dev/null; then
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+    echo >&2 "JSON processor, jq, is required. Please install jq with your package manager."
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+    exit 1
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+fi
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+
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+# Use the fifo as a lock so only one instance of this script can run. (Alternative to flock(1))
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+declare -r FIFO=${TMPDIR:-/tmp}/$(basename "$BASH_SOURCE").fifo
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+if [ -e "$FIFO" ]; then
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+    echo >&2 "Run aborted since fifo and mutex lock $FIFO already exists."
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+    exit 1
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+fi
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+mkfifo $FIFO
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+trap "rm -f $FIFO" EXIT
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+
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+# This works on OS X, but GNU grep works without the cut: grep -Po '(?<=\<script src=")[^"]+'
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+declare -r JS=$(curl -s https://fast.com/ | egrep -o '\<script src="[^"]+' | cut -f2 -d'"')
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+# This works on OS X, but GNU grep works without the cut: grep -Pom1 '(?<=token:")[^"]+'
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+declare -r TOKEN=$(curl -s https://fast.com/$JS | egrep -om1 'token:"[^"]+' | cut -f2 -d'"')
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+
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+echo "# Bytes Cur. rate   Avg. Rate"
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+echo "------- ----------- -----------"
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+
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+# Get a list of URL templates, insert ranges, and make requests in the background.
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+curl -s "https://api.fast.com/netflix/speedtest?https=true&token=$TOKEN" | jq -r '.[].url' | while read url
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+do
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+    FILE_2K=${url/speedtest/speedtest\/range\/0-2048}
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+    FILE_25M=${url/speedtest/speedtest\/range\/0-26214400}
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+    (curl -s -H 'Referer: https://fast.com/' -H 'Origin: https://fast.com' "$FILE_2K" > $FIFO
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+     for i in {1..10}
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+     do
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+         curl -s -H 'Referer: https://fast.com/' -H 'Origin: https://fast.com'  "$FILE_25M" > $FIFO
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+     done) &
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+done
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+pv -rab $FIFO > /dev/null
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