/
grok.go
260 lines (233 loc) · 5.73 KB
/
grok.go
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package yaklib
import (
"bytes"
"encoding/json"
"fmt"
"io"
"github.com/bcicen/jstream"
"github.com/jinzhu/gorm/dialects/postgres"
"github.com/pkg/errors"
"github.com/vjeantet/grok"
"github.com/yaklang/yaklang/common/log"
)
var (
grokParser *grok.Grok
)
var GrokExports = map[string]interface{}{
"ExtractIPv4": RegexpMatchIPv4,
"ExtractIPv6": RegexpMatchIPv6,
"ExtractIP": RegexpMatchIP,
"ExtractEmail": RegexpMatchEmail,
"ExtractPath": RegexpMatchPathParam,
"ExtractTTY": RegexpMatchTTY,
"ExtractURL": RegexpMatchURL,
"ExtractHostPort": RegexpMatchHostPort,
"ExtractMac": RegexpMatchMac,
}
func init() {
if grokParser != nil {
return
}
var err error
grokParser, err = getGrokParser()
if err != nil {
panic("BUG: get grok parser failed: " + err.Error())
}
}
func getGrokParser() (*grok.Grok, error) {
parser, err := grok.NewWithConfig(&grok.Config{
NamedCapturesOnly: false,
SkipDefaultPatterns: false,
RemoveEmptyValues: true,
})
if err != nil {
return nil, err
}
err = parser.AddPatternsFromMap(map[string]string{
`COMMONVERSION`: `(%{INT}\.?)+[a-zA-Z]*?`,
})
if err != nil {
return nil, err
//panic(fmt.Sprintf("add grok pattern failed: %s", err))
}
return parser, nil
}
type GrokResult map[string][]string
func (g GrokResult) Get(key string) string {
res := g.GetAll(key)
if len(res) > 0 {
return res[0]
}
return ""
}
func (g GrokResult) GetAll(key string) []string {
if g == nil {
return nil
}
res, ok := g[key]
if !ok {
return nil
}
if res == nil {
return nil
}
return res
}
func (g GrokResult) GetOr(key string, value string) string {
if g.Get(key) == "" {
return value
}
return g.Get(key)
}
// Grok 用于将字符串 line 使用 Grok 以规则 rule 进行解析,并返回解析结果(map),参考 https://doc.yonyoucloud.com/doc/logstash-best-practice-cn/filter/grok.html 获取更多信息。
// Example:
// ```
// str.Grok("04/18-00:59:45.385191", "%{MONTHNUM:month}/%{MONTHDAY:day}-%{TIME:time}") // map[HOUR:[00] MINUTE:[59] SECOND:[45.385191] day:[18] month:[04] time:[00:59:45.385191]]
// ```
func Grok(line string, rule string) GrokResult {
results, err := grokParser.ParseToMultiMap(rule, line)
if err != nil {
return nil
}
return results
}
func GrokWithMultiPattern(line string, rule string, p map[string]string) GrokResult {
par, err := getGrokParser()
if err != nil {
return nil
}
err = par.AddPatternsFromMap(p)
if err != nil {
log.Errorf("add pattern failed: %s", err)
return nil
}
res, err := par.ParseToMultiMap(rule, line)
if err != nil {
log.Errorf("parse [%s] failed; %s", line, err)
return nil
}
return res
}
func JsonStreamToMapListWithDepth(reader io.Reader, i int) []map[string]interface{} {
if reader == nil {
log.Error("jstream get empty reader...")
return nil
}
var r []map[string]interface{}
for kv := range jstream.NewDecoder(reader, i).Stream() {
m := make(map[string]interface{})
switch raw := kv.Value.(type) {
case map[string]interface{}:
if raw == nil {
continue
}
for k, v := range raw {
m[k] = v
}
default:
log.Errorf("recv: %v cannot handled", kv.Value)
continue
}
if len(m) > 0 {
r = append(r, m)
}
}
return r
}
// JsonStreamToMapList 从 reader 中读取字符串并解析为 map 列表
// Example:
// ```
// reader, writer = io.Pipe()
//
// go fn {
// writer.Write(`{"a":1,"b":2} {"c":3, "d":4}`)
// writer.Close()
// }
//
// println(str.JsonStreamToMapList(reader)) // [map[a:1 b:2] map[c:3 d:4]]
// ```
func JsonStreamToMapList(reader io.Reader) []map[string]interface{} {
return JsonStreamToMapListWithDepth(reader, 0)
}
// JsonToMapList 将 json 字符串 line 解析为 map 列表
// Example:
// ```
// str.JsonToMapList(`{"a":1,"b":2} {"c":3, "d":4}`) // [map[a:1 b:2] map[c:3 d:4]]
// ```
func JsonToMapList(line string) []map[string]string {
var r []map[string]string
for kv := range jstream.NewDecoder(bytes.NewBufferString(line), 0).Stream() {
m := map[string]string{}
switch raw := kv.Value.(type) {
case map[string]interface{}:
for k, v := range raw {
m[k] = fmt.Sprintf("%v", v)
}
default:
log.Errorf("recv: %v cannot handled", kv.Value)
continue
}
if len(m) > 0 {
r = append(r, m)
}
}
return r
}
// JsonToMap 将 json 字符串 line 解析为 map
// Example:
// ```
// str.JsonToMap(`{"a":1,"b":2}`) // map[a:1 b:2]
// ```
func JsonToMap(line string) map[string]string {
raws := JsonToMapList(line)
if len(raws) > 0 {
return raws[0]
}
return nil
}
// ParamsGetOr 从 map 中获取 key 对应的值,如果不存在则返回 defaultValue
// Example:
// ```
// str.ParamsGetOr({"a": "1"}, "a", "2") // 1
// str.ParamsGetOr({"a": "1"}, "b", "2") // 2
// ```
func ParamsGetOr(i map[string]string, key, defaultValue string) string {
if i != nil {
raw, ok := i[key]
if ok {
return raw
}
}
return defaultValue
}
func JsonRawByteToMap(jbyte json.RawMessage) (map[string]interface{}, error) {
var res map[string]interface{}
err := json.Unmarshal(jbyte, &res)
return res, err
}
func JsonbToMap(jb postgres.Jsonb) (map[string]interface{}, error) {
if jb.RawMessage == nil {
return nil, errors.Errorf("content is nil")
}
var res map[string]interface{}
err := json.Unmarshal(jb.RawMessage, &res)
return res, err
}
func JsonbToString(jb postgres.Jsonb) (string, error) {
if jb.RawMessage == nil {
return "", errors.Errorf("content is nil")
}
var res string
err := json.Unmarshal(jb.RawMessage, &res)
return res, err
}
func JsonStrToVarList(jstr string) ([]interface{}, error) {
var res []interface{}
err := json.Unmarshal([]byte(jstr), &res)
return res, err
}
func JsonbToVarList(jb postgres.Jsonb) ([]interface{}, error) {
var res []interface{}
err := json.Unmarshal(jb.RawMessage, &res)
return res, err
}