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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"
"strings"
"time"
"github.com/go-acme/lego/v4/providers/dns/internal/errutils"
"github.com/miekg/dns"
)
const defaultBaseURL = "https://my.rcodezero.at/api"
const authorizationHeader = "Authorization"
// Client for the RcodeZero API.
type Client struct {
apiToken string
baseURL *url.URL
HTTPClient *http.Client
}
// NewClient creates a new Client.
func NewClient(apiToken string) *Client {
baseURL, _ := url.Parse(defaultBaseURL)
return &Client{
apiToken: apiToken,
baseURL: baseURL,
HTTPClient: &http.Client{Timeout: 5 * time.Second},
}
}
func (c *Client) UpdateRecords(ctx context.Context, authZone string, sets []UpdateRRSet) (*APIResponse, error) {
endpoint := c.baseURL.JoinPath("v1", "acme", "zones", strings.TrimSuffix(dns.Fqdn(authZone), "."), "rrsets")
req, err := newJSONRequest(ctx, http.MethodPatch, endpoint, sets)
if err != nil {
return nil, err
}
return c.do(req)
}
func (c *Client) do(req *http.Request) (*APIResponse, error) {
req.Header.Set(authorizationHeader, "Bearer "+c.apiToken)
resp, err := c.HTTPClient.Do(req)
if err != nil {
return nil, errutils.NewHTTPDoError(req, err)
}
defer func() { _ = resp.Body.Close() }()
if resp.StatusCode/100 != 2 {
return nil, parseError(req, resp)
}
result := &APIResponse{}
raw, err := io.ReadAll(resp.Body)
if err != nil {
return nil, errutils.NewReadResponseError(req, resp.StatusCode, err)
}
err = json.Unmarshal(raw, result)
if err != nil {
return nil, errutils.NewUnmarshalError(req, resp.StatusCode, raw, err)
}
return result, 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 parseError(req *http.Request, resp *http.Response) error {
raw, _ := io.ReadAll(resp.Body)
errAPI := &APIResponse{}
err := json.Unmarshal(raw, errAPI)
if err != nil {
return errutils.NewUnexpectedStatusCodeError(req, resp.StatusCode, raw)
}
return fmt.Errorf("[status code: %d] %w", resp.StatusCode, errAPI)
}