mirror of
https://github.com/arangodb/kube-arangodb.git
synced 2024-12-14 11:57:37 +00:00
138 lines
3.2 KiB
Go
138 lines
3.2 KiB
Go
//
|
|
// DISCLAIMER
|
|
//
|
|
// Copyright 2016-2022 ArangoDB GmbH, Cologne, Germany
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
//
|
|
// Copyright holder is ArangoDB GmbH, Cologne, Germany
|
|
//
|
|
|
|
package exporter
|
|
|
|
import (
|
|
"crypto/tls"
|
|
"io"
|
|
"net/http"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/arangodb/kube-arangodb/pkg/util/errors"
|
|
)
|
|
|
|
var _ http.Handler = &passthru{}
|
|
|
|
func NewPassthru(arangodbEndpoint string, auth Authentication, sslVerify bool, timeout time.Duration) (http.Handler, error) {
|
|
return &passthru{
|
|
factory: newHttpClientFactory(arangodbEndpoint, auth, sslVerify, timeout),
|
|
}, nil
|
|
}
|
|
|
|
type httpClientFactory func() (*http.Client, *http.Request, error)
|
|
|
|
func newHttpClientFactory(arangodbEndpoint string, auth Authentication, sslVerify bool, timeout time.Duration) httpClientFactory {
|
|
return func() (*http.Client, *http.Request, error) {
|
|
transport := &http.Transport{}
|
|
|
|
req, err := http.NewRequest("GET", arangodbEndpoint, nil)
|
|
if err != nil {
|
|
return nil, nil, errors.WithStack(err)
|
|
}
|
|
|
|
if !sslVerify {
|
|
transport.TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
|
|
}
|
|
|
|
jwt, err := auth()
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
if jwt != "" {
|
|
hdr, err := CreateArangodJwtAuthorizationHeader(jwt)
|
|
if err != nil {
|
|
return nil, nil, errors.WithStack(err)
|
|
}
|
|
req.Header.Add("Authorization", hdr)
|
|
}
|
|
|
|
req.Header.Add("x-arango-allow-dirty-read", "true") // Allow read from follower in AF mode
|
|
|
|
client := &http.Client{
|
|
Transport: transport,
|
|
Timeout: timeout,
|
|
}
|
|
|
|
return client, req, nil
|
|
}
|
|
}
|
|
|
|
type passthru struct {
|
|
factory httpClientFactory
|
|
}
|
|
|
|
func (p passthru) get() (*http.Response, error) {
|
|
c, req, err := p.factory()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return c.Do(req)
|
|
}
|
|
|
|
func (p passthru) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
|
|
data, err := p.get()
|
|
|
|
if err != nil {
|
|
// Ignore error
|
|
resp.WriteHeader(http.StatusInternalServerError)
|
|
resp.Write([]byte(err.Error()))
|
|
return
|
|
}
|
|
|
|
if data.Body == nil {
|
|
// Ignore error
|
|
resp.WriteHeader(http.StatusInternalServerError)
|
|
resp.Write([]byte("Body is empty"))
|
|
return
|
|
}
|
|
|
|
defer data.Body.Close()
|
|
|
|
response, err := io.ReadAll(data.Body)
|
|
if err != nil {
|
|
// Ignore error
|
|
resp.WriteHeader(http.StatusInternalServerError)
|
|
resp.Write([]byte(err.Error()))
|
|
return
|
|
}
|
|
|
|
responseStr := string(response)
|
|
|
|
// Fix Header response
|
|
responseStr = strings.ReplaceAll(responseStr, "guage", "gauge")
|
|
|
|
// Attach monitor data
|
|
monitorData := currentMembersStatus.Load()
|
|
if monitorData != nil {
|
|
responseStr = responseStr + monitorData.(string)
|
|
}
|
|
|
|
resp.WriteHeader(data.StatusCode)
|
|
_, err = resp.Write([]byte(responseStr))
|
|
if err != nil {
|
|
// Ignore error
|
|
resp.WriteHeader(http.StatusInternalServerError)
|
|
resp.Write([]byte("Unable to write body"))
|
|
return
|
|
}
|
|
}
|