netdata/netdata

// SPDX-License-Identifier: GPL-3.0-or-later

package lighttpd

import (
    _ "embed"
    "errors"
    "time"

    "github.com/netdata/netdata/go/go.d.plugin/agent/module"
    "github.com/netdata/netdata/go/go.d.plugin/pkg/web"
)

//go:embed "config_schema.json"
var configSchema string

func init() {
    module.Register("lighttpd", module.Creator{
        JobConfigSchema: configSchema,
        Create:          func() module.Module { return New() },
        Config:          func() any { return &Config{} },
    })
}

func New() *Lighttpd {
    return &Lighttpd{Config: Config{
        HTTP: web.HTTP{
            Request: web.Request{
                URL: "http://127.0.0.1/server-status?auto",
            },
            Client: web.Client{
                Timeout: web.Duration(time.Second * 2),
            },
        },
    }}
}

type Config struct {
    UpdateEvery int `yaml:"update_every,omitempty" json:"update_every"`
    web.HTTP    `yaml:",inline" json:""`
}

type Lighttpd struct {
    module.Base
    Config `yaml:",inline" json:""`

    apiClient *apiClient
}

func (l *Lighttpd) Configuration() any {
    return l.Config
}

func (l *Lighttpd) Init() error {
    if err := l.validateConfig(); err != nil {
        l.Errorf("config validation: %v", err)
        return err
    }

    client, err := l.initApiClient()
    if err != nil {
        l.Error(err)
        return err
    }
    l.apiClient = client

    l.Debugf("using URL %s", l.URL)
    l.Debugf("using timeout: %s", l.Timeout.Duration())

    return nil
}

func (l *Lighttpd) Check() error {
    mx, err := l.collect()
    if err != nil {
        l.Error(err)
        return err
    }
    if len(mx) == 0 {
        return errors.New("no metrics collected")
    }
    return nil
}

func (l *Lighttpd) Charts() *Charts {
    return charts.Copy()
}

func (l *Lighttpd) Collect() map[string]int64 {
    mx, err := l.collect()

    if err != nil {
        l.Error(err)
        return nil
    }

    return mx
}

func (l *Lighttpd) Cleanup() {
    if l.apiClient != nil && l.apiClient.httpClient != nil {
        l.apiClient.httpClient.CloseIdleConnections()
    }
}