Adding support for API v2 (multiple TXT records)
This commit is contained in:
David Kerr
parent
716f727753
commit
e3ddb677e1
@ -53,8 +53,9 @@ dns_freedns_add() {
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i="$(_math "$i" - 1)"
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sub_domain="$(echo "$fulldomain" | cut -d. -f -"$i")"
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_debug top_domain "$top_domain"
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_debug sub_domain "$sub_domain"
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_debug "top_domain: $top_domain"
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_debug "sub_domain: $sub_domain"
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# Sometimes FreeDNS does not return the subdomain page but rather
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# returns a page regarding becoming a premium member. This usually
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# happens after a period of inactivity. Immediately trying again
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@ -63,6 +64,7 @@ dns_freedns_add() {
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attempts=2
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while [ "$attempts" -gt "0" ]; do
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attempts="$(_math "$attempts" - 1)"
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htmlpage="$(_freedns_retrieve_subdomain_page "$FREEDNS_COOKIE")"
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if [ "$?" != "0" ]; then
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if [ "$using_cached_cookies" = "true" ]; then
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@ -71,10 +73,9 @@ dns_freedns_add() {
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fi
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return 1
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fi
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_debug2 htmlpage "$htmlpage"
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subdomain_csv="$(echo "$htmlpage" | tr -d "\n\r" | _egrep_o '<form .*</form>' | sed 's/<tr>/@<tr>/g' | tr '@' '\n' | grep edit.php | grep "$top_domain")"
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_debug2 subdomain_csv "$subdomain_csv"
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_debug3 "subdomain_csv: $subdomain_csv"
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# The above beauty ends with striping out rows that do not have an
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# href to edit.php and do not have the top domain we are looking for.
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@ -85,55 +86,25 @@ dns_freedns_add() {
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lines="$(echo "$subdomain_csv" | wc -l)"
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i=0
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found=0
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DNSdomainid=""
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while [ "$i" -lt "$lines" ]; do
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i="$(_math "$i" + 1)"
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line="$(echo "$subdomain_csv" | sed -n "${i}p")"
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_debug2 line "$line"
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_debug2 "line $line"
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if [ $found = 0 ] && _contains "$line" "<td>$top_domain</td>"; then
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# this line will contain DNSdomainid for the top_domain
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DNSdomainid="$(echo "$line" | _egrep_o "edit_domain_id *= *.*>" | cut -d = -f 2 | cut -d '>' -f 1)"
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_debug2 DNSdomainid "$DNSdomainid"
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_debug2 "DNSdomainid: $DNSdomainid"
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found=1
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else
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# lines contain DNS records for all subdomains
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DNSname="$(echo "$line" | _egrep_o 'edit.php.*</a>' | cut -d '>' -f 2 | cut -d '<' -f 1)"
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_debug2 DNSname "$DNSname"
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DNStype="$(echo "$line" | sed 's/<td/@<td/g' | tr '@' '\n' | sed -n '4p' | cut -d '>' -f 2 | cut -d '<' -f 1)"
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_debug2 DNStype "$DNStype"
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if [ "$DNSname" = "$fulldomain" ] && [ "$DNStype" = "TXT" ]; then
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DNSdataid="$(echo "$line" | _egrep_o 'data_id=.*' | cut -d = -f 2 | cut -d '>' -f 1)"
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# Now get current value for the TXT record. This method may
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# not produce accurate results as the value field is truncated
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# on this webpage. To get full value we would need to load
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# another page. However we don't really need this so long as
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# there is only one TXT record for the acme challenge subdomain.
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DNSvalue="$(echo "$line" | sed 's/<td/@<td/g' | tr '@' '\n' | sed -n '5p' | cut -d '>' -f 2 | cut -d '<' -f 1)"
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_debug2 DNSvalue "$DNSvalue"
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if [ $found != 0 ]; then
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break
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# we are breaking out of the loop at the first match of DNS name
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# and DNS type (if we are past finding the domainid). This assumes
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# that there is only ever one TXT record for the LetsEncrypt/acme
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# challenge subdomain. This seems to be a reasonable assumption
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# as the acme client deletes the TXT record on successful validation.
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fi
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else
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DNSname=""
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DNStype=""
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fi
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break;
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fi
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done
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_debug "DNSname: $DNSname DNStype: $DNStype DNSdomainid: $DNSdomainid DNSdataid: $DNSdataid"
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_debug "DNSvalue: $DNSvalue"
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if [ -z "$DNSdomainid" ]; then
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# If domain ID is empty then something went wrong (top level
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# domain not found at FreeDNS).
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if [ "$attempts" = "0" ]; then
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# exhausted maximum retry attempts
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_debug "$htmlpage"
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_debug "$subdomain_csv"
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_err "Domain $top_domain not found at FreeDNS"
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return 1
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fi
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@ -145,33 +116,10 @@ dns_freedns_add() {
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_info "Retry loading subdomain page ($attempts attempts remaining)"
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done
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if [ -z "$DNSdataid" ]; then
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# If data ID is empty then specific subdomain does not exist yet, need
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# to create it this should always be the case as the acme client
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# deletes the entry after domain is validated.
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# Add in new TXT record with the value provided
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_debug "Adding TXT record for $fulldomain, $txtvalue"
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_freedns_add_txt_record "$FREEDNS_COOKIE" "$DNSdomainid" "$sub_domain" "$txtvalue"
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return $?
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else
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if [ "$txtvalue" = "$DNSvalue" ]; then
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# if value in TXT record matches value requested then DNS record
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# does not need to be updated. But...
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# Testing value match fails. Website is truncating the value field.
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# So for now we will always go down the else path. Though in theory
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# should never come here anyway as the acme client deletes
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# the TXT record on successful validation, so we should not even
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# have found a TXT record !!
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_info "No update necessary for $fulldomain at FreeDNS"
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return 0
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else
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# Delete the old TXT record (with the wrong value)
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if _freedns_delete_txt_record "$FREEDNS_COOKIE" "$DNSdataid"; then
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# And add in new TXT record with the value provided
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_freedns_add_txt_record "$FREEDNS_COOKIE" "$DNSdomainid" "$sub_domain" "$txtvalue"
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fi
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return $?
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fi
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fi
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return 0
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}
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#Usage: fulldomain txtvalue
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@ -205,7 +153,7 @@ dns_freedns_rm() {
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fi
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subdomain_csv="$(echo "$htmlpage" | tr -d "\n\r" | _egrep_o '<form .*</form>' | sed 's/<tr>/@<tr>/g' | tr '@' '\n' | grep edit.php | grep "$fulldomain")"
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_debug2 subdomain_csv "$subdomain_csv"
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_debug3 "subdomain_csv: $subdomain_csv"
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# The above beauty ends with striping out rows that do not have an
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# href to edit.php and do not have the domain name we are looking for.
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@ -216,35 +164,51 @@ dns_freedns_rm() {
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lines="$(echo "$subdomain_csv" | wc -l)"
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i=0
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found=0
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DNSdataid=""
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while [ "$i" -lt "$lines" ]; do
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i="$(_math "$i" + 1)"
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line="$(echo "$subdomain_csv" | sed -n "${i}p")"
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_debug2 line "$line"
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_debug3 "line: $line"
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DNSname="$(echo "$line" | _egrep_o 'edit.php.*</a>' | cut -d '>' -f 2 | cut -d '<' -f 1)"
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_debug2 DNSname "$DNSname"
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_debug2 "DNSname: $DNSname"
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if [ "$DNSname" = "$fulldomain" ]; then
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DNStype="$(echo "$line" | sed 's/<td/@<td/g' | tr '@' '\n' | sed -n '4p' | cut -d '>' -f 2 | cut -d '<' -f 1)"
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_debug2 DNStype "$DNStype"
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if [ "$DNSname" = "$fulldomain" ] && [ "$DNStype" = "TXT" ]; then
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_debug2 "DNStype: $DNStype"
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if [ "$DNStype" = "TXT" ]; then
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DNSdataid="$(echo "$line" | _egrep_o 'data_id=.*' | cut -d = -f 2 | cut -d '>' -f 1)"
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_debug2 DNSdataid "$DNSdataid"
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_debug2 "DNSdataid: $DNSdataid"
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DNSvalue="$(echo "$line" | sed 's/<td/@<td/g' | tr '@' '\n' | sed -n '5p' | cut -d '>' -f 2 | cut -d '<' -f 1)"
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_debug2 DNSvalue "$DNSvalue"
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# if [ "$DNSvalue" = "$txtvalue" ]; then
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# Testing value match fails. Website is truncating the value
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# field. So for now we will assume that there is only one TXT
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# field for the sub domain and just delete it. Currently this
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# is a safe assumption.
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if _startswith "$DNSvalue" """; then
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# remove the quotation from the start
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DNSvalue="$(echo "$DNSvalue" | cut -c 7-)"
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fi
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if _endswith "$DNSvalue" "..."; then
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# value was truncated, remove the dot dot dot from the end
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DNSvalue="$(echo "$DNSvalue" | sed 's/...$//')"
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elif _endswith "$DNSvalue" """; then
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# else remove the closing quotation from the end
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DNSvalue="$(echo "$DNSvalue" | sed 's/......$//')"
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fi
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_debug2 "DNSvalue: $DNSvalue"
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if [ -n "$DNSdataid" ] && _startswith "$txtvalue" "$DNSvalue"; then
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# Found a match. But note... Website is truncating the
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# value field so we are only testing that part that is not
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# truncated. This should be accurate enough.
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_debug "Deleting TXT record for $fulldomain, $txtvalue"
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_freedns_delete_txt_record "$FREEDNS_COOKIE" "$DNSdataid"
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return $?
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# fi
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fi
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fi
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fi
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done
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done
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# If we get this far we did not find a match (after two attempts)
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# Not necessarily an error, but log anyway.
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_debug2 "$subdomain_csv"
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_info "Cannot delete TXT record for $fulldomain/$txtvalue. Does not exist at FreeDNS"
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_debug3 "$subdomain_csv"
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_info "Cannot delete TXT record for $fulldomain, $txtvalue. Does not exist at FreeDNS"
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return 0
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}
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@ -272,7 +236,7 @@ _freedns_login() {
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# if cookies is not empty then logon successful
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if [ -z "$cookies" ]; then
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_debug "$htmlpage"
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_debug3 "htmlpage: $htmlpage"
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_err "FreeDNS login failed for user $username. Check $HTTP_HEADER file"
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return 1
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fi
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@ -301,7 +265,7 @@ _freedns_retrieve_subdomain_page() {
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return 1
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fi
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_debug2 "$htmlpage"
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_debug3 "htmlpage: $htmlpage"
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printf "%s" "$htmlpage"
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return 0
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@ -323,17 +287,17 @@ _freedns_add_txt_record() {
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_err "FreeDNS failed to add TXT record for $subdomain bad RC from _post"
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return 1
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elif ! grep "200 OK" "$HTTP_HEADER" >/dev/null; then
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_debug "$htmlpage"
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_debug3 "htmlpage: $htmlpage"
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_err "FreeDNS failed to add TXT record for $subdomain. Check $HTTP_HEADER file"
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return 1
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elif _contains "$htmlpage" "security code was incorrect"; then
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_debug "$htmlpage"
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_debug3 "htmlpage: $htmlpage"
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_err "FreeDNS failed to add TXT record for $subdomain as FreeDNS requested security code"
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_err "Note that you cannot use automatic DNS validation for FreeDNS public domains"
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return 1
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fi
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_debug2 "$htmlpage"
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_debug3 "htmlpage: $htmlpage"
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_info "Added acme challenge TXT record for $fulldomain at FreeDNS"
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return 0
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}
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@ -352,7 +316,7 @@ _freedns_delete_txt_record() {
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_err "FreeDNS failed to delete TXT record for $data_id bad RC from _get"
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return 1
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elif ! _contains "$htmlheader" "200 OK"; then
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_debug "$htmlheader"
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_debug2 "htmlheader: $htmlheader"
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_err "FreeDNS failed to delete TXT record $data_id"
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return 1
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fi
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