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// Copyright (C) 2019-2023 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package cloudflare
import (
"bytes"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
)
type createDNSRecord struct {
Type string `json:"type"`
Name string `json:"name"`
Content string `json:"content"`
TTL uint `json:"ttl"`
Priority uint `json:"priority"`
Proxied bool `json:"proxied"`
}
// this data structure is based off the following URL:
// https://community.cloudflare.com/t/cloudflare-api-v4-srv-dns-creation-failure-in-php/25677/7
type createSRVRecord struct {
Type string `json:"type"`
Data struct {
Name string `json:"name"`
TTL uint `json:"ttl"`
Service string `json:"service"`
Proto string `json:"proto"`
Weight uint `json:"weight"`
Port uint `json:"port"`
Priority uint `json:"priority"`
Target string `json:"target"`
} `json:"data"`
}
// createDNSRecordRequest construct a http request that would create a new dns record
func createDNSRecordRequest(zoneID string, authToken string, recordType string, name string, content string, ttl uint, priority uint, proxied bool) (*http.Request, error) {
// verify input arguments
ttl = clampTTL(ttl)
priority = clampPriority(priority)
requestJSON := createDNSRecord{
Type: recordType,
Name: name,
Content: content,
TTL: ttl,
Priority: priority,
Proxied: proxied,
}
requestBodyBytes, err := json.Marshal(requestJSON)
if err != nil {
return nil, err
}
// construct the query
uri, err := url.Parse(fmt.Sprintf("%szones/%s/dns_records", cloudFlareURI, zoneID))
if err != nil {
return nil, err
}
request, err := http.NewRequest("POST", uri.String(), bytes.NewReader(requestBodyBytes))
if err != nil {
return nil, err
}
addHeaders(request, authToken)
return request, nil
}
// createSRVRecordRequest construct a http request that would create a new dns record
func createSRVRecordRequest(zoneID string, authToken string, name string, service string, protocol string, weight uint, port uint, ttl uint, priority uint, target string) (*http.Request, error) {
// verify input arguments
ttl = clampTTL(ttl)
priority = clampPriority(priority)
requestJSON := createSRVRecord{
Type: "SRV",
}
requestJSON.Data.Name = name
requestJSON.Data.TTL = ttl
requestJSON.Data.Service = service
requestJSON.Data.Proto = protocol
requestJSON.Data.Weight = weight
requestJSON.Data.Port = port
requestJSON.Data.Priority = priority
requestJSON.Data.Target = target
requestBodyBytes, err := json.Marshal(requestJSON)
if err != nil {
return nil, err
}
// construct the query
uri, err := url.Parse(fmt.Sprintf("%szones/%s/dns_records", cloudFlareURI, zoneID))
if err != nil {
return nil, err
}
request, err := http.NewRequest("POST", uri.String(), bytes.NewReader(requestBodyBytes))
if err != nil {
return nil, err
}
addHeaders(request, authToken)
return request, nil
}
// CreateDNSRecordResponse is the JSON response for a DNS create request
type CreateDNSRecordResponse struct {
Success bool `json:"success"`
Errors []interface{} `json:"errors"`
Messages []interface{} `json:"messages"`
Result CreateDNSRecordResult `json:"result"`
}
// CreateDNSRecordResult is the result of the response for the DNS create request
type CreateDNSRecordResult struct {
ID string `json:"id"`
Type string `json:"type"`
Name string `json:"name"`
Content string `json:"content"`
Proxiable bool `json:"proxiable"`
Proxied bool `json:"proxied"`
TTL uint `json:"ttl"`
Locked bool `json:"locked"`
ZoneID string `json:"zone_id"`
ZoneName string `json:"zone_name"`
CreatedOn string `json:"created_on"`
ModifiedOn string `json:"modified_on"`
Data interface{} `json:"data"`
}
// parseCreateDNSRecordResponse parses the response that was received as a result of a ListDNSRecordRequest
func parseCreateDNSRecordResponse(response *http.Response) (*CreateDNSRecordResponse, error) {
defer response.Body.Close()
body, err := io.ReadAll(response.Body)
if err != nil {
return nil, err
}
if response.StatusCode != http.StatusOK {
return nil, fmt.Errorf("response status code %d; body = %s", response.StatusCode, string(body))
}
var parsedReponse CreateDNSRecordResponse
if err := json.Unmarshal(body, &parsedReponse); err != nil {
return nil, fmt.Errorf("failed to unmarshal response body '%s' : %v", string(body), err)
}
return &parsedReponse, nil
}
// clampTTL clamps the input ttl value to the accepted range of 120 - 2147483647 or 1 ( automatic )
// see documentation at https://api.cloudflare.com/#dns-records-for-a-zone-create-dns-record
func clampTTL(ttl uint) uint {
if ttl <= AutomaticTTL {
ttl = AutomaticTTL // automatic.
}
if ttl > AutomaticTTL && ttl < 120 {
ttl = 120
}
if ttl > 2147483647 {
ttl = 2147483647
}
return ttl
}
// clampPriority clamps the input priority value to the accepted range of 0..65535
// see documentation at https://api.cloudflare.com/#dns-records-for-a-zone-create-dns-record
func clampPriority(priority uint) uint {
if priority > 65535 {
priority = 65535
}
return priority
}
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