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// SPDX-License-Identifier: GPL-3.0-or-later
package tengine
import (
"bufio"
"fmt"
"io"
"net/http"
"strconv"
"strings"
"github.com/netdata/netdata/go/go.d.plugin/pkg/web"
)
const (
bytesIn = "bytes_in"
bytesOut = "bytes_out"
connTotal = "conn_total"
reqTotal = "req_total"
http2xx = "http_2xx"
http3xx = "http_3xx"
http4xx = "http_4xx"
http5xx = "http_5xx"
httpOtherStatus = "http_other_status"
rt = "rt"
upsReq = "ups_req"
upsRT = "ups_rt"
upsTries = "ups_tries"
http200 = "http_200"
http206 = "http_206"
http302 = "http_302"
http304 = "http_304"
http403 = "http_403"
http404 = "http_404"
http416 = "http_416"
http499 = "http_499"
http500 = "http_500"
http502 = "http_502"
http503 = "http_503"
http504 = "http_504"
http508 = "http_508"
httpOtherDetailStatus = "http_other_detail_status"
httpUps4xx = "http_ups_4xx"
httpUps5xx = "http_ups_5xx"
)
var defaultLineFormat = []string{
bytesIn,
bytesOut,
connTotal,
reqTotal,
http2xx,
http3xx,
http4xx,
http5xx,
httpOtherStatus,
rt,
upsReq,
upsRT,
upsTries,
http200,
http206,
http302,
http304,
http403,
http404,
http416,
http499,
http500,
http502,
http503,
http504,
http508,
httpOtherDetailStatus,
httpUps4xx,
httpUps5xx,
}
func newAPIClient(client *http.Client, request web.Request) *apiClient {
return &apiClient{httpClient: client, request: request}
}
type apiClient struct {
httpClient *http.Client
request web.Request
}
func (a apiClient) getStatus() (*tengineStatus, error) {
req, err := web.NewHTTPRequest(a.request)
if err != nil {
return nil, fmt.Errorf("error on creating request : %v", err)
}
resp, err := a.doRequestOK(req)
defer closeBody(resp)
if err != nil {
return nil, err
}
status, err := parseStatus(resp.Body)
if err != nil {
return nil, fmt.Errorf("error on parsing response : %v", err)
}
return status, nil
}
func (a apiClient) doRequestOK(req *http.Request) (*http.Response, error) {
resp, err := a.httpClient.Do(req)
if err != nil {
return nil, fmt.Errorf("error on request : %v", err)
}
if resp.StatusCode != http.StatusOK {
return resp, fmt.Errorf("%s returned HTTP code %d", req.URL, resp.StatusCode)
}
return resp, nil
}
func closeBody(resp *http.Response) {
if resp != nil && resp.Body != nil {
_, _ = io.Copy(io.Discard, resp.Body)
_ = resp.Body.Close()
}
}
func parseStatus(r io.Reader) (*tengineStatus, error) {
var status tengineStatus
s := bufio.NewScanner(r)
for s.Scan() {
m, err := parseStatusLine(s.Text(), defaultLineFormat)
if err != nil {
return nil, err
}
status = append(status, *m)
}
return &status, nil
}
func parseStatusLine(line string, lineFormat []string) (*metric, error) {
parts := strings.Split(line, ",")
// NOTE: only default line format is supported
// TODO: custom line format?
// www.example.com,127.0.0.1:80,162,6242,1,1,1,0,0,0,0,10,1,10,1....
i := findFirstInt(parts)
if i == -1 {
return nil, fmt.Errorf("invalid line : %s", line)
}
if len(parts[i:]) != len(lineFormat) {
return nil, fmt.Errorf("invalid line length, got %d, expected %d, line : %s",
len(parts[i:]), len(lineFormat), line)
}
// skip "$host,$server_addr:$server_port"
parts = parts[i:]
var m metric
for i, key := range lineFormat {
value := mustParseInt(parts[i])
switch key {
default:
return nil, fmt.Errorf("unknown line format key: %s", key)
case bytesIn:
m.BytesIn = value
case bytesOut:
m.BytesOut = value
case connTotal:
m.ConnTotal = value
case reqTotal:
m.ReqTotal = value
case http2xx:
m.HTTP2xx = value
case http3xx:
m.HTTP3xx = value
case http4xx:
m.HTTP4xx = value
case http5xx:
m.HTTP5xx = value
case httpOtherStatus:
m.HTTPOtherStatus = value
case rt:
m.RT = value
case upsReq:
m.UpsReq = value
case upsRT:
m.UpsRT = value
case upsTries:
m.UpsTries = value
case http200:
m.HTTP200 = value
case http206:
m.HTTP206 = value
case http302:
m.HTTP302 = value
case http304:
m.HTTP304 = value
case http403:
m.HTTP403 = value
case http404:
m.HTTP404 = value
case http416:
m.HTTP416 = value
case http499:
m.HTTP499 = value
case http500:
m.HTTP500 = value
case http502:
m.HTTP502 = value
case http503:
m.HTTP503 = value
case http504:
m.HTTP504 = value
case http508:
m.HTTP508 = value
case httpOtherDetailStatus:
m.HTTPOtherDetailStatus = value
case httpUps4xx:
m.HTTPUps4xx = value
case httpUps5xx:
m.HTTPUps5xx = value
}
}
return &m, nil
}
func findFirstInt(s []string) int {
for i, v := range s {
_, err := strconv.ParseInt(v, 10, 64)
if err != nil {
continue
}
return i
}
return -1
}
func mustParseInt(value string) *int64 {
v, err := strconv.ParseInt(value, 10, 64)
if err != nil {
panic(err)
}
return &v
}
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