/
client.go
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/
client.go
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// Copyright 2019 WhizUs GmbH. All rights reserved.
//
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package opendistro
import (
"bytes"
"context"
"crypto/tls"
"encoding/json"
"fmt"
"github.com/WhizUs/go-opendistro/common"
"github.com/WhizUs/go-opendistro/security"
"github.com/hashicorp/go-retryablehttp"
"github.com/hashicorp/go-rootcerts"
"io/ioutil"
"log"
"net/http"
)
type ClientConfig struct {
Username, Password, BaseURL string
TLSConfig *TLSConfig
}
type TLSConfig struct {
CACert string
CAPath string
ClientCert string
ClientKey string
TLSServerName string
Insecure bool
}
type Client struct {
Client *retryablehttp.Client
Username, Password, BaseURL string
common common.Service
Security securityClient
}
type securityClient struct {
Users security.UserServiceInterface
Roles security.RoleServiceInterface
Rolesmapping security.RolesmappingServiceInterface
Actiongroups security.ActiongroupServiceInterface
Tenants security.TenantServiceInterface
Health security.HealthServiceInterface
}
func NewClient(config *ClientConfig) (*Client, error) {
rc := retryablehttp.NewClient()
if config.TLSConfig != nil {
conf := &tls.Config{
ServerName: config.TLSConfig.TLSServerName,
InsecureSkipVerify: config.TLSConfig.Insecure,
MinVersion: tls.VersionTLS12,
}
if config.TLSConfig.ClientCert != "" && config.TLSConfig.ClientKey != "" {
clientCertificate, err := tls.LoadX509KeyPair(config.TLSConfig.ClientCert, config.TLSConfig.ClientKey)
if err != nil {
return nil, err
}
conf.Certificates = append(conf.Certificates, clientCertificate)
}
if config.TLSConfig.CACert != "" || config.TLSConfig.CAPath != "" {
rootConfig := &rootcerts.Config{
CAFile: config.TLSConfig.CACert,
CAPath: config.TLSConfig.CAPath,
}
if err := rootcerts.ConfigureTLS(conf, rootConfig); err != nil {
return nil, err
}
}
rc.HTTPClient.Transport = &http.Transport{TLSClientConfig: conf}
}
c := &Client{
Client: rc,
Username: config.Username,
Password: config.Password,
BaseURL: config.BaseURL,
}
c.common.Client = c
c.Security = securityClient{
Users: (*security.UserService)(&c.common),
Roles: (*security.RoleService)(&c.common),
Rolesmapping: (*security.RolesmappingService)(&c.common),
Actiongroups: (*security.ActiongroupService)(&c.common),
Tenants: (*security.TenantService)(&c.common),
Health: (*security.HealthService)(&c.common),
}
return c, nil
}
func (c *Client) GetBaseURL() string {
return c.BaseURL
}
func (c *Client) Do(ctx context.Context, reqBytes interface{}, endpoint string, method string) ([]byte, error) {
var req *http.Request
var err error
if reqBytes != nil {
_reqBytes, err := json.Marshal(reqBytes)
if err != nil {
return nil, err
}
req, err = http.NewRequest(method, c.common.Client.GetBaseURL()+endpoint, bytes.NewReader(_reqBytes))
if err != nil {
return nil, err
}
} else {
req, err = http.NewRequest(method, c.common.Client.GetBaseURL()+endpoint, nil)
if err != nil {
return nil, err
}
}
retryableReq, err := retryablehttp.NewRequest(req.Method, req.URL.String(), req.Body)
if err != nil {
return nil, err
}
retryableReq.Header.Add("Content-Type", "application/json")
retryableReq.SetBasicAuth(c.Username, c.Password)
resp, err := c.Client.Do(retryableReq.WithContext(ctx))
if err != nil {
return nil, err
}
defer func() {
err := resp.Body.Close()
if err != nil {
log.Fatal(err)
}
}()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
switch resp.StatusCode {
case http.StatusNotFound:
var sr *common.StatusResponse
err = json.Unmarshal(body, &sr)
if err != nil {
return nil, err
}
if sr.Status != nil && *sr.Status == string(common.Status.Error) {
return nil, common.NewStatusError(*sr.Reason, *sr.InvalidKeys)
}
case http.StatusUnauthorized:
return nil, fmt.Errorf("unauthorized: %s", resp.Body)
}
return body, nil
}
func (c *Client) Get(ctx context.Context, path string, T interface{}) error {
body, err := c.Do(ctx, nil, path, http.MethodGet)
if err != nil {
return err
}
if body == nil {
return nil
}
err = json.Unmarshal(body, &T)
if err != nil {
return err
}
return nil
}
func (c *Client) Modify(ctx context.Context, path string, method string, reqBytes interface{}) error {
body, err := c.Do(ctx, reqBytes, path, method)
if err != nil {
return err
}
var sr *common.StatusResponse
err = json.Unmarshal(body, &sr)
if err != nil {
return err
}
if sr.Status != nil &&
(*sr.Status == string(common.Status.Error) ||
*sr.Status == string(common.Status.NotFound)) {
if sr.InvalidKeys != nil {
if sr.Reason != nil {
return common.NewStatusError(*sr.Reason, *sr.InvalidKeys)
}
return common.NewStatusError(*sr.Message, *sr.InvalidKeys)
}
if sr.Reason != nil {
return common.NewStatusError(*sr.Reason, nil)
}
return common.NewStatusError(*sr.Message, nil)
}
return nil
}