-
Notifications
You must be signed in to change notification settings - Fork 4.9k
/
registered_domain.go
132 lines (112 loc) · 3.68 KB
/
registered_domain.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 registered_domain
import (
"encoding/json"
"fmt"
"strings"
"golang.org/x/net/publicsuffix"
"github.com/elastic/beats/v7/libbeat/beat"
"github.com/elastic/beats/v7/libbeat/common/cfgwarn"
"github.com/elastic/beats/v7/libbeat/processors"
jsprocessor "github.com/elastic/beats/v7/libbeat/processors/script/javascript/module/processor"
conf "github.com/elastic/elastic-agent-libs/config"
"github.com/elastic/elastic-agent-libs/logp"
)
const (
procName = "registered_domain"
logName = "processor." + procName
)
func init() {
processors.RegisterPlugin(procName, New)
jsprocessor.RegisterPlugin("RegisteredDomain", New)
}
type processor struct {
config
log *logp.Logger
}
// New constructs a new processor built from ucfg config.
func New(cfg *conf.C) (beat.Processor, error) {
c := defaultConfig()
if err := cfg.Unpack(&c); err != nil {
return nil, fmt.Errorf("fail to unpack the %v processor configuration: %w", procName, err)
}
return newRegisteredDomain(c)
}
func newRegisteredDomain(c config) (*processor, error) {
cfgwarn.Beta("The " + procName + " processor is beta.")
log := logp.NewLogger(logName)
if c.ID != "" {
log = log.With("instance_id", c.ID)
}
return &processor{config: c, log: log}, nil
}
func (p *processor) String() string {
json, _ := json.Marshal(p.config)
return procName + "=" + string(json)
}
func (p *processor) Run(event *beat.Event) (*beat.Event, error) {
v, err := event.GetValue(p.Field)
if err != nil {
if p.IgnoreMissing || p.IgnoreFailure {
return event, nil
}
return event, fmt.Errorf("registered_domain source field [%v] not found: %w", p.Field, err)
}
domain, ok := v.(string)
if !ok {
if p.IgnoreFailure {
return event, nil
}
return event, fmt.Errorf("registered_domain source field [%v] is not a string", p.Field)
}
rd, err := publicsuffix.EffectiveTLDPlusOne(domain)
if err != nil {
if p.IgnoreFailure {
return event, nil
}
return event, fmt.Errorf("failed to determine the registered domain: %w", err)
}
_, err = event.PutValue(p.TargetField, rd)
if err != nil {
if p.IgnoreFailure {
return event, nil
}
return event, fmt.Errorf("failed to write registered domain to target field [%v]: %w", p.TargetField, err)
}
if p.TargetETLDField != "" {
tld, _ := publicsuffix.PublicSuffix(domain)
if tld != "" {
if _, err = event.PutValue(p.TargetETLDField, tld); err != nil && !p.IgnoreFailure {
return event, fmt.Errorf("failed to write effective top-level domain to target field [%v]: %w", p.TargetETLDField, err)
}
}
}
if p.TargetSubdomainField != "" {
subdomain := strings.TrimSuffix(strings.TrimSuffix(domain, rd), ".")
if subdomain != "" {
_, err = event.PutValue(p.TargetSubdomainField, subdomain)
if err != nil {
if p.IgnoreFailure {
return event, nil
}
return event, fmt.Errorf("failed to write subdomain to target field [%v]: %w", p.TargetSubdomainField, err)
}
}
}
return event, nil
}