Download all of your Team's custom Slack emojis.

download-slack-emoji.sh

#!/bin/bash -eo pipefail
# Log in to Slack in a web browser and open the network tools to inspect the traffic.
# Filter the requests with "/api/" and pick one to inspect.
# You need the xoxc token from the request body, and a copy of the cookies. It is the "d" cookie that is important, but you can copy all of them. Make sure that the cookie value is percent encoded!
# Paste the values below.
# You need to have curl and jq installed.

# You can also get the xoxc token from localStorage. Run this in the JavaScript console:
# Object.entries(JSON.parse(localStorage.localConfig_v2)["teams"]).reduce((o,e) => Object.assign(o, { [e[1]["name"]]: e[1]["token"] }), {})

SLACK_TOKEN="xoxc-...."
COOKIES="d=...."

data=$(curl -q -sS -b "$COOKIES" "https://slack.com/api/emoji.list?token=$SLACK_TOKEN")

if echo "$data" | jq -e '.error?' > /dev/null; then
  echo "$data"
  exit 1
fi

echo "$data" > data.json

echo "$data" | jq -Mr '.emoji | to_entries | .[] | select(.value | startswith("http")) | "\(.key) \(.value)"' | sort | while read name url; do
  fn="$name.${url##*.}"
  [[ -f "$fn" ]] && continue
  echo "$fn"
  curl -q -sS -o "$fn" "$url"
done

I get an
{
"ok": false,
"error": "invalid_auth"
}
for:
curl -q -sS -b "$COOKIES" "https://slack.com/api/emoji.list?token=$SLACK_TOKEN"
I used the sniffed xoxc (q=JSON.parse(localStorage.localConfig_v2)["teams"]; q[Object.keys(q)[0]]["token"]) and the d cookie but no joy.
Any hints?

@donnels I suspect your cookie value is not encoded. It does seem like curl needs the data to already be percent encoded. I'll update the instructions to note this.