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lego/providers/dns/dreamhost/internal/client.go
2023-05-05 09:49:38 +02:00

115 lines
2.6 KiB
Go

package internal
import (
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"time"
"github.com/go-acme/lego/v4/providers/dns/internal/errutils"
)
// DefaultBaseURL the default API endpoint.
const DefaultBaseURL = "https://api.dreamhost.com"
const (
cmdAddRecord = "dns-add_record"
cmdRemoveRecord = "dns-remove_record"
)
// Client the Dreamhost API client.
type Client struct {
apiKey string
BaseURL string
HTTPClient *http.Client
}
// NewClient Creates a new Client.
func NewClient(apiKey string) *Client {
return &Client{
apiKey: apiKey,
BaseURL: DefaultBaseURL,
HTTPClient: &http.Client{Timeout: 5 * time.Second},
}
}
// AddRecord adds a TXT record.
func (c *Client) AddRecord(ctx context.Context, domain, value string) error {
query, err := c.buildEndpoint(cmdAddRecord, domain, value)
if err != nil {
return err
}
return c.updateTxtRecord(ctx, query)
}
// RemoveRecord removes a TXT record.
func (c *Client) RemoveRecord(ctx context.Context, domain, value string) error {
query, err := c.buildEndpoint(cmdRemoveRecord, domain, value)
if err != nil {
return err
}
return c.updateTxtRecord(ctx, query)
}
// action is either cmdAddRecord or cmdRemoveRecord.
func (c *Client) buildEndpoint(action, domain, txt string) (*url.URL, error) {
endpoint, err := url.Parse(c.BaseURL)
if err != nil {
return nil, err
}
query := endpoint.Query()
query.Set("key", c.apiKey)
query.Set("cmd", action)
query.Set("format", "json")
query.Set("record", domain)
query.Set("type", "TXT")
query.Set("value", txt)
query.Set("comment", url.QueryEscape("Managed By lego"))
endpoint.RawQuery = query.Encode()
return endpoint, nil
}
// updateTxtRecord will either add or remove a TXT record.
func (c *Client) updateTxtRecord(ctx context.Context, endpoint *url.URL) error {
req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint.String(), http.NoBody)
if err != nil {
return fmt.Errorf("unable to create request: %w", err)
}
resp, err := c.HTTPClient.Do(req)
if err != nil {
return errutils.NewHTTPDoError(req, err)
}
defer func() { _ = resp.Body.Close() }()
if resp.StatusCode != http.StatusOK {
return errutils.NewUnexpectedResponseStatusCodeError(req, resp)
}
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.Result == "error" {
return fmt.Errorf("add TXT record failed: %s", response.Data)
}
return nil
}