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client.go
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client.go
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package internal
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"github.com/go-acme/lego/v4/challenge/dns01"
"github.com/go-acme/lego/v4/providers/dns/internal/errutils"
"golang.org/x/net/publicsuffix"
)
const defaultBaseURL = "https://gateway.stackpath.com/dns/v1/stacks/"
// Client the API client for Stackpath.
type Client struct {
stackID string
baseURL *url.URL
httpClient *http.Client
}
// NewClient creates a new Client.
func NewClient(ctx context.Context, stackID, clientID, clientSecret string) *Client {
baseURL, _ := url.Parse(defaultBaseURL)
return &Client{
baseURL: baseURL,
stackID: stackID,
httpClient: createOAuthClient(ctx, clientID, clientSecret),
}
}
// GetZones gets all zones.
// https://stackpath.dev/reference/getzones
func (c *Client) GetZones(ctx context.Context, domain string) (*Zone, error) {
endpoint := c.baseURL.JoinPath(c.stackID, "zones")
req, err := newJSONRequest(ctx, http.MethodGet, endpoint, nil)
if err != nil {
return nil, err
}
tld, err := publicsuffix.EffectiveTLDPlusOne(dns01.UnFqdn(domain))
if err != nil {
return nil, err
}
query := req.URL.Query()
query.Add("page_request.filter", fmt.Sprintf("domain='%s'", tld))
req.URL.RawQuery = query.Encode()
var zones Zones
err = c.do(req, &zones)
if err != nil {
return nil, err
}
if len(zones.Zones) == 0 {
return nil, fmt.Errorf("did not find zone with domain %s", domain)
}
return &zones.Zones[0], nil
}
// GetZoneRecords gets all records.
// https://stackpath.dev/reference/getzonerecords
func (c *Client) GetZoneRecords(ctx context.Context, name string, zone *Zone) ([]Record, error) {
endpoint := c.baseURL.JoinPath(c.stackID, "zones", zone.ID, "records")
req, err := newJSONRequest(ctx, http.MethodGet, endpoint, nil)
if err != nil {
return nil, err
}
query := req.URL.Query()
query.Add("page_request.filter", fmt.Sprintf("name='%s' and type='TXT'", name))
req.URL.RawQuery = query.Encode()
var records Records
err = c.do(req, &records)
if err != nil {
return nil, err
}
if len(records.Records) == 0 {
return nil, fmt.Errorf("did not find record with name %s", name)
}
return records.Records, nil
}
// CreateZoneRecord creates a record.
// https://stackpath.dev/reference/createzonerecord
func (c *Client) CreateZoneRecord(ctx context.Context, zone *Zone, record Record) error {
endpoint := c.baseURL.JoinPath(c.stackID, "zones", zone.ID, "records")
req, err := newJSONRequest(ctx, http.MethodPost, endpoint, record)
if err != nil {
return err
}
return c.do(req, nil)
}
// DeleteZoneRecord deletes a record.
// https://stackpath.dev/reference/deletezonerecord
func (c *Client) DeleteZoneRecord(ctx context.Context, zone *Zone, record Record) error {
endpoint := c.baseURL.JoinPath(c.stackID, "zones", zone.ID, "records", record.ID)
req, err := newJSONRequest(ctx, http.MethodDelete, endpoint, nil)
if err != nil {
return err
}
return c.do(req, nil)
}
func newJSONRequest(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)
}
req.Header.Set("Accept", "application/json")
if payload != nil {
req.Header.Set("Content-Type", "application/json")
}
return 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() }()
if resp.StatusCode/100 != 2 {
return parseError(req, resp)
}
if result == nil {
return nil
}
raw, err := io.ReadAll(resp.Body)
if err != nil {
return errutils.NewReadResponseError(req, resp.StatusCode, err)
}
err = json.Unmarshal(raw, result)
if err != nil {
return errutils.NewUnmarshalError(req, resp.StatusCode, raw, err)
}
return nil
}
func parseError(req *http.Request, resp *http.Response) error {
raw, _ := io.ReadAll(resp.Body)
errResp := &ErrorResponse{}
err := json.Unmarshal(raw, errResp)
if err != nil {
return errutils.NewUnexpectedStatusCodeError(req, resp.StatusCode, raw)
}
return errResp
}