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client.go
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client.go
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package bluecat
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"regexp"
"strconv"
"strings"
)
// JSON body for Bluecat entity requests and responses
type bluecatEntity struct {
ID string `json:"id,omitempty"`
Name string `json:"name"`
Type string `json:"type"`
Properties string `json:"properties"`
}
type entityResponse struct {
ID uint `json:"id"`
Name string `json:"name"`
Type string `json:"type"`
Properties string `json:"properties"`
}
// Starts a new Bluecat API Session. Authenticates using customerName, userName,
// password and receives a token to be used in for subsequent requests.
func (d *DNSProvider) login() error {
queryArgs := map[string]string{
"username": d.config.UserName,
"password": d.config.Password,
}
resp, err := d.sendRequest(http.MethodGet, "login", nil, queryArgs)
if err != nil {
return err
}
defer resp.Body.Close()
authBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
return fmt.Errorf("bluecat: %v", err)
}
authResp := string(authBytes)
if strings.Contains(authResp, "Authentication Error") {
msg := strings.Trim(authResp, "\"")
return fmt.Errorf("bluecat: request failed: %s", msg)
}
// Upon success, API responds with "Session Token-> BAMAuthToken: dQfuRMTUxNjc3MjcyNDg1ODppcGFybXM= <- for User : username"
d.token = regexp.MustCompile("BAMAuthToken: [^ ]+").FindString(authResp)
return nil
}
// Destroys Bluecat Session
func (d *DNSProvider) logout() error {
if len(d.token) == 0 {
// nothing to do
return nil
}
resp, err := d.sendRequest(http.MethodGet, "logout", nil, nil)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return fmt.Errorf("bluecat: request failed to delete session with HTTP status code %d", resp.StatusCode)
}
authBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
authResp := string(authBytes)
if !strings.Contains(authResp, "successfully") {
msg := strings.Trim(authResp, "\"")
return fmt.Errorf("bluecat: request failed to delete session: %s", msg)
}
d.token = ""
return nil
}
// Lookup the entity ID of the configuration named in our properties
func (d *DNSProvider) lookupConfID() (uint, error) {
queryArgs := map[string]string{
"parentId": strconv.Itoa(0),
"name": d.config.ConfigName,
"type": configType,
}
resp, err := d.sendRequest(http.MethodGet, "getEntityByName", nil, queryArgs)
if err != nil {
return 0, err
}
defer resp.Body.Close()
var conf entityResponse
err = json.NewDecoder(resp.Body).Decode(&conf)
if err != nil {
return 0, fmt.Errorf("bluecat: %v", err)
}
return conf.ID, nil
}
// Find the DNS view with the given name within
func (d *DNSProvider) lookupViewID(viewName string) (uint, error) {
confID, err := d.lookupConfID()
if err != nil {
return 0, err
}
queryArgs := map[string]string{
"parentId": strconv.FormatUint(uint64(confID), 10),
"name": viewName,
"type": viewType,
}
resp, err := d.sendRequest(http.MethodGet, "getEntityByName", nil, queryArgs)
if err != nil {
return 0, err
}
defer resp.Body.Close()
var view entityResponse
err = json.NewDecoder(resp.Body).Decode(&view)
if err != nil {
return 0, fmt.Errorf("bluecat: %v", err)
}
return view.ID, nil
}
// Return the entityId of the parent zone by recursing from the root view
// Also return the simple name of the host
func (d *DNSProvider) lookupParentZoneID(viewID uint, fqdn string) (uint, string, error) {
parentViewID := viewID
name := ""
if fqdn != "" {
zones := strings.Split(strings.Trim(fqdn, "."), ".")
last := len(zones) - 1
name = zones[0]
for i := last; i > -1; i-- {
zoneID, err := d.getZone(parentViewID, zones[i])
if err != nil || zoneID == 0 {
return parentViewID, name, err
}
if i > 0 {
name = strings.Join(zones[0:i], ".")
}
parentViewID = zoneID
}
}
return parentViewID, name, nil
}
// Get the DNS zone with the specified name under the parentId
func (d *DNSProvider) getZone(parentID uint, name string) (uint, error) {
queryArgs := map[string]string{
"parentId": strconv.FormatUint(uint64(parentID), 10),
"name": name,
"type": zoneType,
}
resp, err := d.sendRequest(http.MethodGet, "getEntityByName", nil, queryArgs)
// Return an empty zone if the named zone doesn't exist
if resp != nil && resp.StatusCode == http.StatusNotFound {
return 0, fmt.Errorf("bluecat: could not find zone named %s", name)
}
if err != nil {
return 0, err
}
defer resp.Body.Close()
var zone entityResponse
err = json.NewDecoder(resp.Body).Decode(&zone)
if err != nil {
return 0, fmt.Errorf("bluecat: %v", err)
}
return zone.ID, nil
}
// Deploy the DNS config for the specified entity to the authoritative servers
func (d *DNSProvider) deploy(entityID uint) error {
queryArgs := map[string]string{
"entityId": strconv.FormatUint(uint64(entityID), 10),
}
resp, err := d.sendRequest(http.MethodPost, "quickDeploy", nil, queryArgs)
if err != nil {
return err
}
defer resp.Body.Close()
return nil
}
// Send a REST request, using query parameters specified. The Authorization
// header will be set if we have an active auth token
func (d *DNSProvider) sendRequest(method, resource string, payload interface{}, queryArgs map[string]string) (*http.Response, error) {
url := fmt.Sprintf("%s/Services/REST/v1/%s", d.config.BaseURL, resource)
body, err := json.Marshal(payload)
if err != nil {
return nil, fmt.Errorf("bluecat: %v", err)
}
req, err := http.NewRequest(method, url, bytes.NewReader(body))
if err != nil {
return nil, fmt.Errorf("bluecat: %v", err)
}
req.Header.Set("Content-Type", "application/json")
if len(d.token) > 0 {
req.Header.Set("Authorization", d.token)
}
// Add all query parameters
q := req.URL.Query()
for argName, argVal := range queryArgs {
q.Add(argName, argVal)
}
req.URL.RawQuery = q.Encode()
resp, err := d.config.HTTPClient.Do(req)
if err != nil {
return nil, fmt.Errorf("bluecat: %v", err)
}
if resp.StatusCode >= 400 {
errBytes, _ := ioutil.ReadAll(resp.Body)
errResp := string(errBytes)
return nil, fmt.Errorf("bluecat: request failed with HTTP status code %d\n Full message: %s",
resp.StatusCode, errResp)
}
return resp, nil
}