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

189 lines
4.4 KiB
Go

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"
)
// defaultBaseURL represents the API endpoint to call.
const defaultBaseURL = "https://napi.arvancloud.ir"
const authorizationHeader = "Authorization"
// Client the ArvanCloud client.
type Client struct {
apiKey string
baseURL *url.URL
HTTPClient *http.Client
}
// NewClient Creates a new Client.
func NewClient(apiKey string) *Client {
baseURL, _ := url.Parse(defaultBaseURL)
return &Client{
apiKey: apiKey,
baseURL: baseURL,
HTTPClient: &http.Client{Timeout: 5 * time.Second},
}
}
// GetTxtRecord gets a TXT record.
func (c *Client) GetTxtRecord(ctx context.Context, domain, name, value string) (*DNSRecord, error) {
records, err := c.getRecords(ctx, domain, name)
if err != nil {
return nil, err
}
for _, record := range records {
if equalsTXTRecord(record, name, value) {
return &record, nil
}
}
return nil, fmt.Errorf("could not find record: Domain: %s; Record: %s", domain, name)
}
// https://www.arvancloud.ir/docs/api/cdn/4.0#operation/dns_records.list
func (c *Client) getRecords(ctx context.Context, domain, search string) ([]DNSRecord, error) {
endpoint := c.baseURL.JoinPath("cdn", "4.0", "domains", domain, "dns-records")
if search != "" {
query := endpoint.Query()
query.Set("search", strings.ReplaceAll(search, "_", ""))
endpoint.RawQuery = query.Encode()
}
req, err := newJSONRequest(ctx, http.MethodGet, endpoint, nil)
if err != nil {
return nil, err
}
response := &apiResponse[[]DNSRecord]{}
err = c.do(req, http.StatusOK, response)
if err != nil {
return nil, fmt.Errorf("could not get records %s: Domain: %s: %w", search, domain, err)
}
return response.Data, nil
}
// CreateRecord creates a DNS record.
// https://www.arvancloud.ir/docs/api/cdn/4.0#operation/dns_records.create
func (c *Client) CreateRecord(ctx context.Context, domain string, record DNSRecord) (*DNSRecord, error) {
endpoint := c.baseURL.JoinPath("cdn", "4.0", "domains", domain, "dns-records")
req, err := newJSONRequest(ctx, http.MethodPost, endpoint, record)
if err != nil {
return nil, err
}
response := &apiResponse[*DNSRecord]{}
err = c.do(req, http.StatusCreated, response)
if err != nil {
return nil, fmt.Errorf("could not create record; Domain: %s: %w", domain, err)
}
return response.Data, nil
}
// DeleteRecord deletes a DNS record.
// https://www.arvancloud.ir/docs/api/cdn/4.0#operation/dns_records.remove
func (c *Client) DeleteRecord(ctx context.Context, domain, id string) error {
endpoint := c.baseURL.JoinPath("cdn", "4.0", "domains", domain, "dns-records", id)
req, err := newJSONRequest(ctx, http.MethodDelete, endpoint, nil)
if err != nil {
return err
}
err = c.do(req, http.StatusOK, nil)
if err != nil {
return fmt.Errorf("could not delete record %s; Domain: %s: %w", id, domain, err)
}
return nil
}
func (c *Client) do(req *http.Request, expectedStatus int, result any) error {
req.Header.Set(authorizationHeader, c.apiKey)
resp, err := c.HTTPClient.Do(req)
if err != nil {
return errutils.NewHTTPDoError(req, err)
}
defer func() { _ = resp.Body.Close() }()
if resp.StatusCode != expectedStatus {
return errutils.NewUnexpectedResponseStatusCodeError(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 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 equalsTXTRecord(record DNSRecord, name, value string) bool {
if record.Type != "txt" {
return false
}
if record.Name != name {
return false
}
data, ok := record.Value.(map[string]any)
if !ok {
return false
}
return data["text"] == value
}