commit e1820e27df20e7f904e72dcb72d82a21bdc84f02
Author: tastytea <tastytea@tastytea.de>
Date:   Sun Jun 23 22:05:07 2019 +0200

    Added instanceinfo.sh

diff --git a/instanceinfo.sh b/instanceinfo.sh
new file mode 100755
index 0000000..3c46b94
--- /dev/null
+++ b/instanceinfo.sh
@@ -0,0 +1,90 @@
+#!/bin/bash
+
+if [ -z "${1}" ]; then
+    echo "usage: ${0} DOMAIN" >&2
+    exit 1
+fi
+
+function pretty()
+{
+    local extract="${@}"
+    if command -v json_pp > /dev/null; then
+        echo "{${extract}}" | json_pp
+    else
+        echo "${extract}"
+    fi
+}
+
+function striphtml()
+{
+    local extract="${@}"
+    echo "${extract}" | sed 's/\\u003c/</g' | sed 's/\\u003e/>/g' | sed -E 's/<[^>]+>//g' | sed 's/\\r\\n/ /g'
+}
+
+function main()
+{
+    local instance="${1}"
+    local nodeinfo="https://${instance}/nodeinfo/2.0.json"
+    local mastoinfo="https://${instance}/api/v1/instance"
+
+    if curl -sIf "${nodeinfo}" | grep -q '200 OK'; then
+        echo "Nodeinfo found."
+        json="$(curl -s ${nodeinfo})"
+        local implementation=""
+
+        if grep -q pleroma <<<"${json}"; then
+            implementation="Pleroma"
+        fi
+        [[ -n "${implementation}" ]] && echo "${implementation} detected."
+
+        echo -n "Description: "
+        grep -Eo '"nodeDescription":"[^"]+"' <<<"${json}" | cut -d: -f2
+
+        echo "Admins: "
+        pretty $(grep -Eo '"staffAccounts":\[[^]]+\]' <<<"${json}")
+
+        echo -n "Number of users: "
+        grep -Eo '"total":[0-9]+' <<<"${json}" | cut -d: -f2
+
+        echo "Blocked instances: "
+        pretty $(grep -Eo '"reject":\[[^]]+\]' <<<"${json}" | head -n1)
+
+        if [[ "${implementation}" == "Pleroma" ]]; then
+            echo "Further info, maybe: https://${instance}/static/terms-of-service.html"
+        fi
+    elif curl -sIf "${mastoinfo}" > /dev/null; then
+        echo "Mastodon API found."
+        json="$(curl -s ${mastoinfo})"
+        local implementation=""
+
+        if grep -q '"is_pro"' <<<"${json}"; then
+            implementation="Gab"
+        elif grep -Eq '"version":"[0-9]+\.[0-9]+\.[0-9]+"' <<<"${json}"; then
+            implementation="Mastodon"
+        fi
+        [[ -n "${implementation}" ]] && echo "${implementation} detected."
+
+        echo -n "Description: "
+        striphtml $(grep -Eo '"description":"[^,]+",' <<<"${json}") | cut -d: -f2,3,4,5,6,7,8,9
+
+        local admin=$(grep -Eo '"acct":"[^"]+"' <<<"${json}" | cut -d: -f2 | sed 's/"//g')"@${instance}"
+        [[ -n "${admin}" ]] && echo "Admin: @${admin}"
+
+        local email=$(grep -Eo '"email":"[^"]+"' <<<"${json}" | cut -d: -f2)
+        [[ -n "${email}" ]] && echo "E-Mail: ${email}"
+
+        echo -n "Number of users: "
+        grep -Eo '"user_count":[0-9]+' <<<"${json}" | cut -d: -f2
+
+        if [[ "${implementation}" == "Mastodon" ]]; then
+            echo "Further info, maybe: https://${instance}/about/more"
+        fi
+    else
+        echo "Could not detect type of server."
+        curl -I "https://${instance}/"
+    fi
+
+    echo "See also: https://fediverse.network/${instance}"
+}
+
+main "${1}"