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digitalocean.go
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digitalocean.go
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// Copyright 2018 Josh Lindsey <[email protected]>
//
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"strconv"
"strings"
)
var doAPIEndpoint = "https://api.digitalocean.com/v2/domains"
type doTXTRecord struct {
Ref int `json:"id"`
DomainName string `json:"name"`
Data string `json:"data"`
}
func (r *doTXTRecord) ID() string {
return strconv.Itoa(r.Ref)
}
func (r *doTXTRecord) Name() string {
return r.DomainName
}
func (r *doTXTRecord) Text() string {
return r.Data
}
// DOConfig encodes the configuration for the DigitalOcean DNS provider.
type DOConfig struct {
Token string `json:"token"`
Zone string `json:"zone"`
}
// DOProvider is the concrete implementation of DNSProvider for DigitalOcean.
type DOProvider struct {
client *http.Client
config *DOConfig
}
func (d *DOProvider) String() string {
return fmt.Sprintf("DOProvider{Zone:%s}", d.config.Zone)
}
// NewDOProvider takes a config and returns a new DOProvider.
func NewDOProvider(config *DOConfig) *DOProvider {
return &DOProvider{
config: config,
client: &http.Client{},
}
}
// Get implements the DNSProvider interface Get method.
func (d *DOProvider) Get(id string) (TXTRecord, error) {
logger := baseLogger.Named("DOProvider").Named("Get")
uri := fmt.Sprintf("%s/%s/records/%s", doAPIEndpoint, d.config.Zone, id)
logger = logger.With("url", uri)
logger.Trace("Fetching record")
req, err := http.NewRequest("GET", uri, nil)
if err != nil {
return nil, err
}
req.Header.Set("Content-Type", "application/json")
req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", d.config.Token))
resp, err := d.client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode == http.StatusNotFound {
return nil, nil
}
respBody, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("bad response from DO API: %s", respBody)
}
out := struct {
Record doTXTRecord `json:"domain_record"`
}{}
err = json.Unmarshal(respBody, &out)
if err != nil {
return nil, err
}
out.Record.DomainName = fmt.Sprintf("%s.%s", out.Record.DomainName, d.config.Zone)
return &out.Record, nil
}
// Create implements the DNSProvider interface Create method.
func (d *DOProvider) Create(proto TXTRecord) (string, error) {
logger := baseLogger.Named("DOProvider").Named("Create")
dnsReqBody := map[string]string{
"type": "TXT",
"name": strings.Replace(proto.Name(), fmt.Sprintf(".%s", d.config.Zone), "", 1),
"ttl": strconv.Itoa(acmeChallengeTTL),
"data": proto.Text(),
}
logger.Debug("DNS record to create", "req", dnsReqBody)
body, err := json.Marshal(dnsReqBody)
if err != nil {
return "", err
}
uri := fmt.Sprintf("%s/%s/records", doAPIEndpoint, d.config.Zone)
logger.Trace("POST", "uri", uri)
req, err := http.NewRequest("POST", uri, bytes.NewBuffer(body))
if err != nil {
return "", err
}
req.Header.Set("Content-Type", "application/json")
req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", d.config.Token))
resp, err := d.client.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
respBody, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
if resp.StatusCode != http.StatusCreated {
return "", fmt.Errorf("bad response from DO API: %s", respBody)
}
out := struct {
Record doTXTRecord `json:"domain_record"`
}{}
err = json.Unmarshal(respBody, &out)
if err != nil {
return "", err
}
return out.Record.ID(), nil
}
// Delete implements the DNSProvider interface Delete method.
func (d *DOProvider) Delete(id string) error {
logger := baseLogger.Named("DOProvider").Named("Get")
uri := fmt.Sprintf("%s/%s/records/%s", doAPIEndpoint, d.config.Zone, id)
logger = logger.With("url", uri)
logger.Trace("Fetching record")
req, err := http.NewRequest("DELETE", uri, nil)
if err != nil {
return err
}
req.Header.Set("Content-Type", "application/json")
req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", d.config.Token))
resp, err := d.client.Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
respBody, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
if resp.StatusCode != http.StatusNoContent {
return fmt.Errorf("bad response from DO API: %s", respBody)
}
return nil
}