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// SPDX-License-Identifier: GPL-3.0-or-later
package apache
import (
"bufio"
"fmt"
"io"
"net/http"
"strconv"
"strings"
"github.com/netdata/netdata/go/go.d.plugin/pkg/stm"
"github.com/netdata/netdata/go/go.d.plugin/pkg/web"
)
func (a *Apache) collect() (map[string]int64, error) {
status, err := a.scrapeStatus()
if err != nil {
return nil, err
}
mx := stm.ToMap(status)
if len(mx) == 0 {
return nil, fmt.Errorf("nothing was collected from %s", a.URL)
}
a.once.Do(func() { a.charts = newCharts(status) })
return mx, nil
}
func (a *Apache) scrapeStatus() (*serverStatus, error) {
req, err := web.NewHTTPRequest(a.Request)
if err != nil {
return nil, err
}
resp, err := a.httpClient.Do(req)
if err != nil {
return nil, fmt.Errorf("error on HTTP request '%s': %v", req.URL, err)
}
defer closeBody(resp)
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("'%s' returned HTTP status code: %d", req.URL, resp.StatusCode)
}
return parseResponse(resp.Body)
}
func parseResponse(r io.Reader) (*serverStatus, error) {
s := bufio.NewScanner(r)
var status serverStatus
for s.Scan() {
parts := strings.Split(s.Text(), ":")
if len(parts) != 2 {
continue
}
key, value := strings.TrimSpace(parts[0]), strings.TrimSpace(parts[1])
switch key {
default:
case "BusyServers", "IdleServers":
return nil, fmt.Errorf("found '%s', Lighttpd data", key)
case "BusyWorkers":
status.Workers.Busy = parseInt(value)
case "IdleWorkers":
status.Workers.Idle = parseInt(value)
case "ConnsTotal":
status.Connections.Total = parseInt(value)
case "ConnsAsyncWriting":
status.Connections.Async.Writing = parseInt(value)
case "ConnsAsyncKeepAlive":
status.Connections.Async.KeepAlive = parseInt(value)
case "ConnsAsyncClosing":
status.Connections.Async.Closing = parseInt(value)
case "Total Accesses":
status.Total.Accesses = parseInt(value)
case "Total kBytes":
status.Total.KBytes = parseInt(value)
case "Uptime":
status.Uptime = parseInt(value)
case "ReqPerSec":
status.Averages.ReqPerSec = parseFloat(value)
case "BytesPerSec":
status.Averages.BytesPerSec = parseFloat(value)
case "BytesPerReq":
status.Averages.BytesPerReq = parseFloat(value)
case "Scoreboard":
status.Scoreboard = parseScoreboard(value)
}
}
return &status, nil
}
func parseScoreboard(line string) *scoreboard {
// “_” Waiting for Connection
// “S” Starting up
// “R” Reading Request
// “W” Sending Reply
// “K” Keepalive (read)
// “D” DNS Lookup
// “C” Closing connection
// “L” Logging
// “G” Gracefully finishing
// “I” Idle cleanup of worker
// “.” Open slot with no current process
var sb scoreboard
for _, s := range strings.Split(line, "") {
switch s {
case "_":
sb.Waiting++
case "S":
sb.Starting++
case "R":
sb.Reading++
case "W":
sb.Sending++
case "K":
sb.KeepAlive++
case "D":
sb.DNSLookup++
case "C":
sb.Closing++
case "L":
sb.Logging++
case "G":
sb.Finishing++
case "I":
sb.IdleCleanup++
case ".":
sb.Open++
}
}
return &sb
}
func parseInt(value string) *int64 {
v, err := strconv.ParseInt(value, 10, 64)
if err != nil {
return nil
}
return &v
}
func parseFloat(value string) *float64 {
v, err := strconv.ParseFloat(value, 64)
if err != nil {
return nil
}
return &v
}
func closeBody(resp *http.Response) {
if resp != nil && resp.Body != nil {
_, _ = io.Copy(io.Discard, resp.Body)
_ = resp.Body.Close()
}
}
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