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client.go
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client.go
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package internal
import (
"bytes"
"context"
"crypto/md5"
"encoding/hex"
"encoding/json"
"errors"
"fmt"
"io"
"net/http"
"net/url"
"strconv"
"time"
"github.com/entrustcorporation/dv/dns01"
"github.com/entrustcorporation/dv/providers/internal/errutils"
)
const defaultBaseURL = "https://www.cloudxns.net/api2/"
// Client CloudXNS client.
type Client struct {
apiKey string
secretKey string
baseURL *url.URL
HTTPClient *http.Client
}
// NewClient creates a CloudXNS client.
func NewClient(apiKey, secretKey string) (*Client, error) {
if apiKey == "" {
return nil, errors.New("credentials missing: apiKey")
}
if secretKey == "" {
return nil, errors.New("credentials missing: secretKey")
}
baseURL, _ := url.Parse(defaultBaseURL)
return &Client{
apiKey: apiKey,
secretKey: secretKey,
baseURL: baseURL,
HTTPClient: &http.Client{Timeout: 10 * time.Second},
}, nil
}
// GetDomainInformation Get domain name information for a FQDN.
func (c *Client) GetDomainInformation(ctx context.Context, fqdn string) (*Data, error) {
endpoint := c.baseURL.JoinPath("domain")
req, err := c.newRequest(ctx, http.MethodGet, endpoint, nil)
if err != nil {
return nil, err
}
authZone, err := dns01.FindZoneByFqdn(fqdn)
if err != nil {
return nil, fmt.Errorf("cloudflare: could not find zone for FQDN %q: %w", fqdn, err)
}
var domains []Data
err = c.do(req, &domains)
if err != nil {
return nil, err
}
for _, data := range domains {
if data.Domain == authZone {
return &data, nil
}
}
return nil, fmt.Errorf("zone %s not found for domain %s", authZone, fqdn)
}
// FindTxtRecord return the TXT record a zone ID and a FQDN.
func (c *Client) FindTxtRecord(ctx context.Context, zoneID, fqdn string) (*TXTRecord, error) {
endpoint := c.baseURL.JoinPath("record", zoneID)
query := endpoint.Query()
query.Set("host_id", "0")
query.Set("offset", "0")
query.Set("row_num", "2000")
endpoint.RawQuery = query.Encode()
req, err := c.newRequest(ctx, http.MethodGet, endpoint, nil)
if err != nil {
return nil, err
}
var records []TXTRecord
err = c.do(req, &records)
if err != nil {
return nil, err
}
for _, record := range records {
if record.Host == dns01.UnFqdn(fqdn) && record.Type == "TXT" {
return &record, nil
}
}
return nil, fmt.Errorf("no existing record found for %q", fqdn)
}
// AddTxtRecord add a TXT record.
func (c *Client) AddTxtRecord(ctx context.Context, info *Data, fqdn, value string, ttl int) error {
id, err := strconv.Atoi(info.ID)
if err != nil {
return fmt.Errorf("invalid zone ID: %w", err)
}
endpoint := c.baseURL.JoinPath("record")
subDomain, err := dns01.ExtractSubDomain(fqdn, info.Domain)
if err != nil {
return err
}
record := TXTRecord{
ID: id,
Host: subDomain,
Value: value,
Type: "TXT",
LineID: 1,
TTL: ttl,
}
req, err := c.newRequest(ctx, http.MethodPost, endpoint, record)
if err != nil {
return err
}
return c.do(req, nil)
}
// RemoveTxtRecord remove a TXT record.
func (c *Client) RemoveTxtRecord(ctx context.Context, recordID, zoneID string) error {
endpoint := c.baseURL.JoinPath("record", recordID, zoneID)
req, err := c.newRequest(ctx, http.MethodDelete, endpoint, nil)
if err != nil {
return err
}
return c.do(req, nil)
}
func (c *Client) do(req *http.Request, result any) error {
resp, err := c.HTTPClient.Do(req)
if err != nil {
return errutils.NewHTTPDoError(req, err)
}
defer func() { _ = resp.Body.Close() }()
raw, err := io.ReadAll(resp.Body)
if err != nil {
return errutils.NewReadResponseError(req, resp.StatusCode, err)
}
var response apiResponse
err = json.Unmarshal(raw, &response)
if err != nil {
return errutils.NewUnmarshalError(req, resp.StatusCode, raw, err)
}
if response.Code != 1 {
return fmt.Errorf("[status code %d] invalid code (%v) error: %s", resp.StatusCode, response.Code, response.Message)
}
if result == nil {
return nil
}
if len(response.Data) == 0 {
return nil
}
err = json.Unmarshal(response.Data, result)
if err != nil {
return errutils.NewUnmarshalError(req, resp.StatusCode, raw, err)
}
return nil
}
func (c *Client) newRequest(ctx context.Context, method string, endpoint *url.URL, payload any) (*http.Request, error) {
buf := new(bytes.Buffer)
if payload != nil {
err := json.NewEncoder(buf).Encode(payload)
if err != nil {
return nil, fmt.Errorf("failed to create request JSON body: %w", err)
}
}
req, err := http.NewRequestWithContext(ctx, method, endpoint.String(), buf)
if err != nil {
return nil, fmt.Errorf("unable to create request: %w", err)
}
requestDate := time.Now().Format(time.RFC1123Z)
req.Header.Set("API-KEY", c.apiKey)
req.Header.Set("API-REQUEST-DATE", requestDate)
req.Header.Set("API-HMAC", c.hmac(endpoint.String(), requestDate, buf.String()))
req.Header.Set("API-FORMAT", "json")
return req, nil
}
func (c *Client) hmac(endpoint, date, body string) string {
sum := md5.Sum([]byte(c.apiKey + endpoint + body + date + c.secretKey))
return hex.EncodeToString(sum[:])
}