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// SPDX-License-Identifier: GPL-3.0-or-later
package phpfpm
import (
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"strconv"
"time"
"github.com/netdata/netdata/go/go.d.plugin/pkg/web"
fcgiclient "github.com/tomasen/fcgi_client"
)
type (
status struct {
Active int64 `json:"active processes" stm:"active"`
MaxActive int64 `json:"max active processes" stm:"maxActive"`
Idle int64 `json:"idle processes" stm:"idle"`
Requests int64 `json:"accepted conn" stm:"requests"`
Reached int64 `json:"max children reached" stm:"reached"`
Slow int64 `json:"slow requests" stm:"slow"`
Processes []proc `json:"processes"`
}
proc struct {
PID int64 `json:"pid"`
State string `json:"state"`
Duration requestDuration `json:"request duration"`
CPU float64 `json:"last request cpu"`
Memory int64 `json:"last request memory"`
}
requestDuration int64
)
// UnmarshalJSON customise JSON for timestamp.
func (rd *requestDuration) UnmarshalJSON(b []byte) error {
if rdc, err := strconv.Atoi(string(b)); err != nil {
*rd = 0
} else {
*rd = requestDuration(rdc)
}
return nil
}
type client interface {
getStatus() (*status, error)
}
type httpClient struct {
client *http.Client
req web.Request
dec decoder
}
func newHTTPClient(c *http.Client, r web.Request) (*httpClient, error) {
u, err := url.Parse(r.URL)
if err != nil {
return nil, err
}
dec := decodeText
if _, ok := u.Query()["json"]; ok {
dec = decodeJSON
}
return &httpClient{
client: c,
req: r,
dec: dec,
}, nil
}
func (c *httpClient) getStatus() (*status, error) {
req, err := web.NewHTTPRequest(c.req)
if err != nil {
return nil, fmt.Errorf("error on creating HTTP request: %v", err)
}
resp, err := c.client.Do(req)
if err != nil {
return nil, fmt.Errorf("error on HTTP request to '%s': %v", req.URL, err)
}
defer func() {
_, _ = io.Copy(io.Discard, resp.Body)
_ = resp.Body.Close()
}()
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("%s returned HTTP status %d", req.URL, resp.StatusCode)
}
st := &status{}
if err := c.dec(resp.Body, st); err != nil {
return nil, fmt.Errorf("error parsing HTTP response from '%s': %v", req.URL, err)
}
return st, nil
}
type socketClient struct {
socket string
timeout time.Duration
env map[string]string
}
func newSocketClient(socket string, timeout time.Duration, fcgiPath string) *socketClient {
return &socketClient{
socket: socket,
timeout: timeout,
env: map[string]string{
"SCRIPT_NAME": fcgiPath,
"SCRIPT_FILENAME": fcgiPath,
"SERVER_SOFTWARE": "go / fcgiclient ",
"REMOTE_ADDR": "127.0.0.1",
"QUERY_STRING": "json&full",
"REQUEST_METHOD": "GET",
"CONTENT_TYPE": "application/json",
},
}
}
func (c *socketClient) getStatus() (*status, error) {
socket, err := fcgiclient.DialTimeout("unix", c.socket, c.timeout)
if err != nil {
return nil, fmt.Errorf("error on connecting to socket '%s': %v", c.socket, err)
}
defer socket.Close()
resp, err := socket.Get(c.env)
if err != nil {
return nil, fmt.Errorf("error on getting data from socket '%s': %v", c.socket, err)
}
content, err := io.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("error on reading response from socket '%s': %v", c.socket, err)
}
st := &status{}
if err := json.Unmarshal(content, st); err != nil {
return nil, fmt.Errorf("error on decoding response from socket '%s': %v", c.socket, err)
}
return st, nil
}
type tcpClient struct {
address string
timeout time.Duration
env map[string]string
}
func newTcpClient(address string, timeout time.Duration, fcgiPath string) *tcpClient {
return &tcpClient{
address: address,
timeout: timeout,
env: map[string]string{
"SCRIPT_NAME": fcgiPath,
"SCRIPT_FILENAME": fcgiPath,
"SERVER_SOFTWARE": "go / fcgiclient ",
"REMOTE_ADDR": "127.0.0.1",
"QUERY_STRING": "json&full",
"REQUEST_METHOD": "GET",
"CONTENT_TYPE": "application/json",
},
}
}
func (c *tcpClient) getStatus() (*status, error) {
client, err := fcgiclient.DialTimeout("tcp", c.address, c.timeout)
if err != nil {
return nil, fmt.Errorf("error on connecting to address '%s': %v", c.address, err)
}
defer client.Close()
resp, err := client.Get(c.env)
if err != nil {
return nil, fmt.Errorf("error on getting data from address '%s': %v", c.address, err)
}
content, err := io.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("error on reading response from address '%s': %v", c.address, err)
}
st := &status{}
if err := json.Unmarshal(content, st); err != nil {
return nil, fmt.Errorf("error on decoding response from address '%s': %v", c.address, err)
}
return st, nil
}
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