61 lines
1.6 KiB
Bash
Executable File
61 lines
1.6 KiB
Bash
Executable File
#!/bin/zsh
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# Generates an nginx-map of User-Agents to block from the rejected domains in
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# mrf_simple.
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# Save the output to a file and include it in your nginx configuration. Then
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# add `if ($blockedagent) { return 403; }` to your server blocks.
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# Version: 2019-08-18_4
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function get_domains() # Output domains, separated by newline.
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{
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local instance="${1}"
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local nodeinfo=$(curl -s "https://${instance}/nodeinfo/2.1.json")
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local domains_json=$(jq -c '.metadata.federation.mrf_simple.reject' \
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<<<"${nodeinfo}")
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sed -e 's/\[//' -e 's/\]//' -e 's/"//g' -e 's/,/\n/g' <<<"${domains_json}"
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}
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function print_entry() # Output map entry.
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{
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local domain="${1}"
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# Transform strings to regular expressions.
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domain=$(sed 's/\./\\./g' <<<${domain}) # . → \.
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domain=$(sed 's/\*/.*/g' <<<${domain}) # * → .*
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echo " ~*//${domain} 1;"
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}
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function main()
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{
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local instance="${1}"
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if [[ -z "${instance}" ]]; then
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echo "Usage: ${ZSH_ARGZERO} instance" >&2
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echo " ${ZSH_ARGZERO} instance" \
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"> /etc/nginx/useragents_fedi.rules" >&2
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return 1
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fi
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if ! command -v curl > /dev/null; then
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echo "Error: curl not found. Please install it." >&2
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return 2
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fi
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if ! command -v jq > /dev/null; then
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echo "Error: jq not found. Please install it." >&2
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return 2
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fi
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echo 'map $http_user_agent $blockedagent {'
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echo " default 0;"
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for domain in $(get_domains "${instance}"); do
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print_entry "${domain}"
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done
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echo "}"
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}
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main "${1}"
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