client.go raw

   1  package internal
   2  
   3  import (
   4  	"bytes"
   5  	"context"
   6  	"encoding/json"
   7  	"fmt"
   8  	"io"
   9  	"net/http"
  10  	"net/url"
  11  	"strings"
  12  	"time"
  13  
  14  	"github.com/go-acme/lego/v4/providers/dns/internal/errutils"
  15  	"github.com/miekg/dns"
  16  )
  17  
  18  const defaultBaseURL = "https://my.rcodezero.at/api"
  19  
  20  const authorizationHeader = "Authorization"
  21  
  22  // Client for the RcodeZero API.
  23  type Client struct {
  24  	apiToken string
  25  
  26  	baseURL    *url.URL
  27  	HTTPClient *http.Client
  28  }
  29  
  30  // NewClient creates a new Client.
  31  func NewClient(apiToken string) *Client {
  32  	baseURL, _ := url.Parse(defaultBaseURL)
  33  
  34  	return &Client{
  35  		apiToken:   apiToken,
  36  		baseURL:    baseURL,
  37  		HTTPClient: &http.Client{Timeout: 5 * time.Second},
  38  	}
  39  }
  40  
  41  func (c *Client) UpdateRecords(ctx context.Context, authZone string, sets []UpdateRRSet) (*APIResponse, error) {
  42  	endpoint := c.baseURL.JoinPath("v1", "acme", "zones", strings.TrimSuffix(dns.Fqdn(authZone), "."), "rrsets")
  43  
  44  	req, err := newJSONRequest(ctx, http.MethodPatch, endpoint, sets)
  45  	if err != nil {
  46  		return nil, err
  47  	}
  48  
  49  	return c.do(req)
  50  }
  51  
  52  func (c *Client) do(req *http.Request) (*APIResponse, error) {
  53  	req.Header.Set(authorizationHeader, "Bearer "+c.apiToken)
  54  
  55  	resp, err := c.HTTPClient.Do(req)
  56  	if err != nil {
  57  		return nil, errutils.NewHTTPDoError(req, err)
  58  	}
  59  
  60  	defer func() { _ = resp.Body.Close() }()
  61  
  62  	if resp.StatusCode/100 != 2 {
  63  		return nil, parseError(req, resp)
  64  	}
  65  
  66  	result := &APIResponse{}
  67  
  68  	raw, err := io.ReadAll(resp.Body)
  69  	if err != nil {
  70  		return nil, errutils.NewReadResponseError(req, resp.StatusCode, err)
  71  	}
  72  
  73  	err = json.Unmarshal(raw, result)
  74  	if err != nil {
  75  		return nil, errutils.NewUnmarshalError(req, resp.StatusCode, raw, err)
  76  	}
  77  
  78  	return result, nil
  79  }
  80  
  81  func newJSONRequest(ctx context.Context, method string, endpoint *url.URL, payload any) (*http.Request, error) {
  82  	buf := new(bytes.Buffer)
  83  
  84  	if payload != nil {
  85  		err := json.NewEncoder(buf).Encode(payload)
  86  		if err != nil {
  87  			return nil, fmt.Errorf("failed to create request JSON body: %w", err)
  88  		}
  89  	}
  90  
  91  	req, err := http.NewRequestWithContext(ctx, method, endpoint.String(), buf)
  92  	if err != nil {
  93  		return nil, fmt.Errorf("unable to create request: %w", err)
  94  	}
  95  
  96  	req.Header.Set("Accept", "application/json")
  97  
  98  	if payload != nil {
  99  		req.Header.Set("Content-Type", "application/json")
 100  	}
 101  
 102  	return req, nil
 103  }
 104  
 105  func parseError(req *http.Request, resp *http.Response) error {
 106  	raw, _ := io.ReadAll(resp.Body)
 107  
 108  	errAPI := &APIResponse{}
 109  
 110  	err := json.Unmarshal(raw, errAPI)
 111  	if err != nil {
 112  		return errutils.NewUnexpectedStatusCodeError(req, resp.StatusCode, raw)
 113  	}
 114  
 115  	return fmt.Errorf("[status code: %d] %w", resp.StatusCode, errAPI)
 116  }
 117