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lego/providers/dns/constellix/internal/client.go

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package internal
import (
"encoding/json"
"fmt"
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"io"
"net/http"
"net/url"
"path"
)
const (
defaultBaseURL = "https://api.dns.constellix.com"
defaultVersion = "v1"
)
// Client the Constellix client.
type Client struct {
BaseURL string
HTTPClient *http.Client
common service // Reuse a single struct instead of allocating one for each service on the heap.
// Services used for communicating with the API
Domains *DomainService
TxtRecords *TxtRecordService
}
// NewClient Creates a Constellix client.
func NewClient(httpClient *http.Client) *Client {
if httpClient == nil {
httpClient = http.DefaultClient
}
client := &Client{
BaseURL: defaultBaseURL,
HTTPClient: httpClient,
}
client.common.client = client
client.Domains = (*DomainService)(&client.common)
client.TxtRecords = (*TxtRecordService)(&client.common)
return client
}
type service struct {
client *Client
}
// do sends an API request and returns the API response.
func (c *Client) do(req *http.Request, v interface{}) error {
req.Header.Set("Content-Type", "application/json")
resp, err := c.HTTPClient.Do(req)
if err != nil {
return err
}
defer func() { _ = resp.Body.Close() }()
err = checkResponse(resp)
if err != nil {
return err
}
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raw, err := io.ReadAll(resp.Body)
if err != nil {
return fmt.Errorf("failed to read body: %w", err)
}
if err = json.Unmarshal(raw, v); err != nil {
return fmt.Errorf("unmarshaling %T error: %w: %s", v, err, string(raw))
}
return nil
}
func (c *Client) createEndpoint(fragment ...string) (string, error) {
baseURL, err := url.Parse(c.BaseURL)
if err != nil {
return "", err
}
endpoint, err := baseURL.Parse(path.Join(fragment...))
if err != nil {
return "", err
}
return endpoint.String(), nil
}
func checkResponse(resp *http.Response) error {
if resp.StatusCode == http.StatusOK {
return nil
}
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data, err := io.ReadAll(resp.Body)
if err == nil && data != nil {
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msg := &APIError{StatusCode: resp.StatusCode}
if json.Unmarshal(data, msg) != nil {
return fmt.Errorf("API error: status code: %d: %v", resp.StatusCode, string(data))
}
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switch resp.StatusCode {
case http.StatusNotFound:
return &NotFound{APIError: msg}
case http.StatusBadRequest:
return &BadRequest{APIError: msg}
default:
return msg
}
}
return fmt.Errorf("API error, status code: %d", resp.StatusCode)
}