/
uds_reader.go
88 lines (74 loc) · 1.96 KB
/
uds_reader.go
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// Copyright 2024 NexHealth Inc.
// 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.
package collector
import (
"context"
"fmt"
"io"
"net"
"net/http"
"os"
"path/filepath"
"sync"
"time"
)
const (
UDSPath = "agents.s/core_api"
ReadOnlyAdminUsername = "ro_admin"
ReadOnlyAdminPasswordFile = "read_only_admin_password.txt"
)
type UDSReader struct {
Path string
sync.Mutex
}
func NewUDSReader(path string) *UDSReader {
return &UDSReader{
Path: path,
}
}
func (r *UDSReader) Read() (io.ReadCloser, error) {
r.Lock()
defer r.Unlock()
registry, err := filepath.Glob(filepath.Join(r.Path, "passenger.???????"))
if err != nil {
return nil, err
}
if len(registry) == 0 {
return nil, fmt.Errorf("failed to detect Passenger instance registry directory")
}
uds := filepath.Join(registry[0], UDSPath)
passwordFile := filepath.Join(registry[0], ReadOnlyAdminPasswordFile)
password, err := os.ReadFile(passwordFile)
if err != nil {
return nil, err
}
client := http.Client{
Timeout: 1 * time.Second,
Transport: &http.Transport{
DisableKeepAlives: true,
DialContext: func(_ context.Context, _, _ string) (net.Conn, error) {
return net.Dial("unix", uds)
},
},
}
req, err := http.NewRequest(http.MethodGet, "http://unix/pool.xml", nil)
if err != nil {
return nil, err
}
req.SetBasicAuth(ReadOnlyAdminUsername, string(password))
response, err := client.Do(req)
if err != nil {
return nil, err
}
return response.Body, nil
}