sentiment.sh

#!/bin/sh

# See https://github.com/xiaohan2012/twitter-sent-dnn

if [ "${#}" -eq 0 ]; then
    echo "Usage: ${0} message"
    exit 1
fi

html=$(curl 'https://twitter-sentiment-cnn.herokuapp.com/' \
    -H 'Pragma: no-cache' \
    -H 'Origin: https://twitter-sentiment-cnn.herokuapp.com' \
    -H 'Accept-Encoding: gzip, deflate, br' \
    -H 'Accept-Language: en-GB,en-US;q=0.8,en;q=0.6' \
    -H 'Upgrade-Insecure-Requests: 1' \
    -H 'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36' \
    -H 'Content-Type: application/x-www-form-urlencoded' \
    -H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8' \
    -H 'Cache-Control: no-cache' \
    -H 'Referer: https://twitter-sentiment-cnn.herokuapp.com/' \
    -H 'Connection: keep-alive' \
    --data "tweet=${*}&tweet_submit_button=Submit" \
    --silent \
    --compressed)

# Floating point regex, see http://stackoverflow.com/a/658662/659910
echo "${html}" | grep -m 1 'The sentiment index is' | grep -Eo '[+\-]?(?:0|[1-9]\d*)(?:\.\d*)?(?:[eE][+\-]?\d+)?'