acme.sh/dnsapi/dns_hetzner.sh
Sergey Ponomarev 6b7b5caf54 DNS provider API: structured description
Instead of using comments declare info in a special variable.
Then the variable can be used to print the DNS API provider usage.
The usage can be parsed on UI and show all needed inputs for options.

The info is stored in plain string that it's both human-readable and easy to parse:

    dns_example_info='API name
     An extended description.
     Multiline.
    Domains: list of alternative domains to find
    Site: the dns provider website e.g. example.com
    Docs: Link to ACME.sh wiki for the provider
    Options:
     VARIABLE1 Title for the option1.
     VARIABLE2 Title for the option2. Default "default value".
     VARIABLE3 Title for the option3. Description to show on UI. Optional.
    Issues: Link to a support ticket on https://github.com/acmesh-official/acme.sh
    Author: First Lastname <authoremail@example.com>, Another Author <https://github.com/example>;
    '

Here:
VARIABLE1 will be required.
VARIABLE2 will be required too but will be populated with a "default value".
VARIABLE3 is optional and can be empty.

A DNS provider may have alternative options like CloudFlare may use API KEY or API Token.
You can use a second section OptionsAlt: section.

Some providers may have alternative names or domains e.g. Aliyun and AlibabaCloud.
Add them to Domains: section.

Signed-off-by: Sergey Ponomarev <stokito@gmail.com>
2024-05-18 12:06:41 +03:00

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#!/usr/bin/env sh
# shellcheck disable=SC2034
dns_hetzner_info='Hetzner.com
Site: Hetzner.com
Docs: github.com/acmesh-official/acme.sh/wiki/dnsapi#dns_hetzner
Options:
HETZNER_Token API Token
Issues: github.com/acmesh-official/acme.sh/issues/2943
'
HETZNER_Api="https://dns.hetzner.com/api/v1"
######## Public functions #####################
# Usage: add _acme-challenge.www.domain.com "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
# Used to add txt record
# Ref: https://dns.hetzner.com/api-docs/
dns_hetzner_add() {
full_domain=$1
txt_value=$2
HETZNER_Token="${HETZNER_Token:-$(_readaccountconf_mutable HETZNER_Token)}"
if [ -z "$HETZNER_Token" ]; then
HETZNER_Token=""
_err "You didn't specify a Hetzner api token."
_err "You can get yours from here https://dns.hetzner.com/settings/api-token."
return 1
fi
#save the api key and email to the account conf file.
_saveaccountconf_mutable HETZNER_Token "$HETZNER_Token"
_debug "First detect the root zone"
if ! _get_root "$full_domain"; then
_err "Invalid domain"
return 1
fi
_debug _domain_id "$_domain_id"
_debug _sub_domain "$_sub_domain"
_debug _domain "$_domain"
_debug "Getting TXT records"
if ! _find_record "$_sub_domain" "$txt_value"; then
return 1
fi
if [ -z "$_record_id" ]; then
_info "Adding record"
if _hetzner_rest POST "records" "{\"zone_id\":\"${HETZNER_Zone_ID}\",\"type\":\"TXT\",\"name\":\"$_sub_domain\",\"value\":\"$txt_value\",\"ttl\":120}"; then
if _contains "$response" "$txt_value"; then
_info "Record added, OK"
_sleep 2
return 0
fi
fi
_err "Add txt record error${_response_error}"
return 1
else
_info "Found record id: $_record_id."
_info "Record found, do nothing."
return 0
# we could modify a record, if the names for txt records for *.example.com and example.com would be not the same
#if _hetzner_rest PUT "records/${_record_id}" "{\"zone_id\":\"${HETZNER_Zone_ID}\",\"type\":\"TXT\",\"name\":\"$full_domain\",\"value\":\"$txt_value\",\"ttl\":120}"; then
# if _contains "$response" "$txt_value"; then
# _info "Modified, OK"
# return 0
# fi
#fi
#_err "Add txt record error (modify)."
#return 1
fi
}
# Usage: full_domain txt_value
# Used to remove the txt record after validation
dns_hetzner_rm() {
full_domain=$1
txt_value=$2
HETZNER_Token="${HETZNER_Token:-$(_readaccountconf_mutable HETZNER_Token)}"
_debug "First detect the root zone"
if ! _get_root "$full_domain"; then
_err "Invalid domain"
return 1
fi
_debug _domain_id "$_domain_id"
_debug _sub_domain "$_sub_domain"
_debug _domain "$_domain"
_debug "Getting TXT records"
if ! _find_record "$_sub_domain" "$txt_value"; then
return 1
fi
if [ -z "$_record_id" ]; then
_info "Remove not needed. Record not found."
else
if ! _hetzner_rest DELETE "records/$_record_id"; then
_err "Delete record error${_response_error}"
return 1
fi
_sleep 2
_info "Record deleted"
fi
}
#################### Private functions below ##################################
#returns
# _record_id=a8d58f22d6931bf830eaa0ec6464bf81 if found; or 1 if error
_find_record() {
unset _record_id
_record_name=$1
_record_value=$2
if [ -z "$_record_value" ]; then
_record_value='[^"]*'
fi
_debug "Getting all records"
_hetzner_rest GET "records?zone_id=${_domain_id}"
if _response_has_error; then
_err "Error${_response_error}"
return 1
else
_record_id=$(
echo "$response" |
grep -o "{[^\{\}]*\"name\":\"$_record_name\"[^\}]*}" |
grep "\"value\":\"$_record_value\"" |
while read -r record; do
# test for type and
if [ -n "$(echo "$record" | _egrep_o '"type":"TXT"')" ]; then
echo "$record" | _egrep_o '"id":"[^"]*"' | cut -d : -f 2 | tr -d \"
break
fi
done
)
fi
}
#_acme-challenge.www.domain.com
#returns
# _sub_domain=_acme-challenge.www
# _domain=domain.com
# _domain_id=sdjkglgdfewsdfg
_get_root() {
domain=$1
i=1
p=1
domain_without_acme=$(echo "$domain" | cut -d . -f 2-)
domain_param_name=$(echo "HETZNER_Zone_ID_for_${domain_without_acme}" | sed 's/[\.\-]/_/g')
_debug "Reading zone_id for '$domain_without_acme' from config..."
HETZNER_Zone_ID=$(_readdomainconf "$domain_param_name")
if [ "$HETZNER_Zone_ID" ]; then
_debug "Found, using: $HETZNER_Zone_ID"
if ! _hetzner_rest GET "zones/${HETZNER_Zone_ID}"; then
_debug "Zone with id '$HETZNER_Zone_ID' does not exist."
_cleardomainconf "$domain_param_name"
unset HETZNER_Zone_ID
else
if _contains "$response" "\"id\":\"$HETZNER_Zone_ID\""; then
_domain=$(printf "%s\n" "$response" | _egrep_o '"name":"[^"]*"' | cut -d : -f 2 | tr -d \" | head -n 1)
if [ "$_domain" ]; then
_cut_length=$((${#domain} - ${#_domain} - 1))
_sub_domain=$(printf "%s" "$domain" | cut -c "1-$_cut_length")
_domain_id="$HETZNER_Zone_ID"
return 0
else
return 1
fi
else
return 1
fi
fi
fi
_debug "Trying to get zone id by domain name for '$domain_without_acme'."
while true; do
h=$(printf "%s" "$domain" | cut -d . -f $i-100)
if [ -z "$h" ]; then
#not valid
return 1
fi
_debug h "$h"
_hetzner_rest GET "zones?name=$h"
if _contains "$response" "\"name\":\"$h\"" || _contains "$response" '"total_entries":1'; then
_domain_id=$(echo "$response" | _egrep_o "\[.\"id\":\"[^\"]*\"" | _head_n 1 | cut -d : -f 2 | tr -d \")
if [ "$_domain_id" ]; then
_sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-$p)
_domain=$h
HETZNER_Zone_ID=$_domain_id
_savedomainconf "$domain_param_name" "$HETZNER_Zone_ID"
return 0
fi
return 1
fi
p=$i
i=$(_math "$i" + 1)
done
return 1
}
#returns
# _response_error
_response_has_error() {
unset _response_error
err_part="$(echo "$response" | _egrep_o '"error":{[^}]*}')"
if [ -n "$err_part" ]; then
err_code=$(echo "$err_part" | _egrep_o '"code":[0-9]+' | cut -d : -f 2)
err_message=$(echo "$err_part" | _egrep_o '"message":"[^"]+"' | cut -d : -f 2 | tr -d \")
if [ -n "$err_code" ] && [ -n "$err_message" ]; then
_response_error=" - message: ${err_message}, code: ${err_code}"
return 0
fi
fi
return 1
}
#returns
# response
_hetzner_rest() {
m=$1
ep="$2"
data="$3"
_debug "$ep"
key_trimmed=$(echo "$HETZNER_Token" | tr -d \")
export _H1="Content-TType: application/json"
export _H2="Auth-API-Token: $key_trimmed"
if [ "$m" != "GET" ]; then
_debug data "$data"
response="$(_post "$data" "$HETZNER_Api/$ep" "" "$m")"
else
response="$(_get "$HETZNER_Api/$ep")"
fi
if [ "$?" != "0" ] || _response_has_error; then
_debug "Error$_response_error"
return 1
fi
_debug2 response "$response"
return 0
}