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powerdns.go
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powerdns.go
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package powerdns
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"log"
"net/http"
"net/url"
"strings"
)
type service struct {
client *Client
}
// Client configuration structure
type Client struct {
Scheme string
Hostname string
Port string
VHost string
Headers map[string]string
httpClient *http.Client
common service // Reuse a single struct instead of allocating one for each service on the heap
Config *ConfigService
Cryptokeys *CryptokeysService
Records *RecordsService
Servers *ServersService
Statistics *StatisticsService
Zones *ZonesService
TSIGKey *TSIGKeyService
}
// logFatalf makes log.Fatalf testable
var logFatalf = log.Fatalf
// NewClient initializes a new client instance
func NewClient(baseURL string, vHost string, headers map[string]string, httpClient *http.Client) *Client {
scheme, hostname, port, err := parseBaseURL(baseURL)
if err != nil {
logFatalf("%s is not a valid url: %v", baseURL, err)
}
c := &Client{
Scheme: scheme,
Hostname: hostname,
Port: port,
VHost: parseVHost(vHost),
Headers: headers,
httpClient: httpClient,
}
if c.httpClient == nil {
c.httpClient = http.DefaultClient
}
c.common.client = c
c.Config = (*ConfigService)(&c.common)
c.Cryptokeys = (*CryptokeysService)(&c.common)
c.Records = (*RecordsService)(&c.common)
c.Servers = (*ServersService)(&c.common)
c.Statistics = (*StatisticsService)(&c.common)
c.Zones = (*ZonesService)(&c.common)
c.TSIGKey = (*TSIGKeyService)(&c.common)
return c
}
func parseBaseURL(baseURL string) (string, string, string, error) {
u, err := url.Parse(baseURL)
if err != nil {
return "", "", "", err
}
hp := strings.Split(u.Host, ":")
hostname := hp[0]
var port string
if len(hp) > 1 {
port = hp[1]
} else {
if u.Scheme == "https" {
port = "443"
} else {
port = "80"
}
}
return u.Scheme, hostname, port, nil
}
func parseVHost(vHost string) string {
if vHost == "" {
return "localhost"
}
return vHost
}
func generateAPIURL(scheme, hostname, port, path string, query *url.Values) url.URL {
u := url.URL{}
u.Scheme = scheme
u.Host = fmt.Sprintf("%s:%s", hostname, port)
u.Path = fmt.Sprintf("/api/v1/%s", path)
if query != nil {
u.RawQuery = query.Encode()
}
return u
}
func trimDomain(domain string) string {
return strings.TrimSuffix(domain, ".")
}
func makeDomainCanonical(domain string) string {
return fmt.Sprintf("%s.", trimDomain(domain))
}
func (p *Client) newRequest(ctx context.Context, method string, path string, query *url.Values, body interface{}) (*http.Request, error) {
var buf io.ReadWriter
if body != nil {
buf = new(bytes.Buffer)
_ = json.NewEncoder(buf).Encode(body)
}
apiURL := generateAPIURL(p.Scheme, p.Hostname, p.Port, path, query)
req, err := http.NewRequestWithContext(ctx, method, apiURL.String(), buf)
if err != nil {
return nil, err
}
if body != nil {
req.Header.Set("Content-Type", "application/json")
req.Header.Set("Accept", "application/json")
}
req.Header.Set("User-Agent", "go-powerdns")
for key, value := range p.Headers {
req.Header.Set(key, value)
}
return req, nil
}
func (p *Client) do(req *http.Request, v interface{}) (*http.Response, error) {
resp, err := p.httpClient.Do(req)
if err != nil {
return nil, err
}
if resp.StatusCode == 401 {
return resp, &Error{
Status: resp.Status,
StatusCode: resp.StatusCode,
Message: "Unauthorized",
}
}
if resp.StatusCode < 200 || resp.StatusCode > 299 {
defer func() {
_ = resp.Body.Close()
}()
var message string
if resp.Header.Get("Content-Type") == "application/json" {
apiError := new(Error)
_ = json.NewDecoder(resp.Body).Decode(&apiError)
message = apiError.Message
} else {
messageBytes, _ := io.ReadAll(resp.Body)
message = string(messageBytes)
}
return resp, &Error{
Status: resp.Status,
StatusCode: resp.StatusCode,
Message: message,
}
}
if v != nil && resp.StatusCode != http.StatusNoContent {
defer func() {
_ = resp.Body.Close()
}()
err = json.NewDecoder(resp.Body).Decode(v)
}
return resp, err
}