forked from stackmutt/whoisd
/
storage.go
318 lines (290 loc) · 8.25 KB
/
storage.go
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// Copyright 2017 Openprovider Authors. All rights reserved.
// Use of this source code is governed by a license
// that can be found in the LICENSE file.
package storage
import (
"log"
"os"
"sort"
"strings"
"time"
"github.com/openprovider/whoisd/pkg/config"
"github.com/openprovider/whoisd/pkg/mapper"
"golang.org/x/net/idna"
)
// Storage - the interface for every implementation of storage
type Storage interface {
Search(name string, query string) (map[string][]string, error)
SearchRelated(typeTable string, name string, query string) (map[string][]string, error)
SearchMultiple(typeTable string, name string, query string) (map[string][]string, error)
}
// Record - standard record (struct) for storage package
type Record struct {
dataStore Storage
mapper.Bundle
}
// simplest logger, which initialized during starts of the application
var (
stdlog = log.New(os.Stdout, "[STORAGE]: ", log.Ldate|log.Ltime)
errlog = log.New(os.Stderr, "[STORAGE:ERROR]: ", log.Ldate|log.Ltime|log.Lshortfile)
)
// New - returns new Storage instance
func New(conf *config.Record, bundle mapper.Bundle) *Record {
switch strings.ToLower(conf.Storage.StorageType) {
case "mysql":
return &Record{
&MysqlRecord{
conf.Storage.Host,
conf.Storage.Port,
conf.Storage.User,
conf.Storage.Password,
conf.Storage.IndexBase,
conf.Storage.TypeTable,
},
bundle,
}
case "elasticsearch":
return &Record{
&ElasticsearchRecord{
conf.Storage.Host,
conf.Storage.Port,
conf.Storage.IndexBase,
conf.Storage.TypeTable,
},
bundle,
}
case "dummy":
fallthrough
default:
return &Record{
&DummyRecord{conf.Storage.TypeTable},
bundle,
}
}
}
// Search and sort a data from the storage
func (storage *Record) Search(query string) (answer string, ok bool) {
ok = false
answer = "not found\n"
stdlog.Println("query:", query)
if len(strings.TrimSpace(query)) == 0 {
errlog.Println("Empty query")
} else {
entry, err := storage.request(strings.TrimSpace(query))
if err != nil {
errlog.Println("Query:", query, err.Error())
} else {
if entry == nil || len(entry.Fields) == 0 {
return answer, ok
}
ok = true
// get keys of a map and sort their
keys := make([]string, 0, len(entry.Fields))
for key := range entry.Fields {
keys = append(keys, key)
}
sort.Strings(keys)
answer = prepareAnswer(entry, keys)
}
}
return answer, ok
}
// request - get and load bundle by query
func (storage *Record) request(query string) (*mapper.Entry, error) {
TLD := detachTLD(query)
if TLD == "" {
return nil, nil
}
template := storage.Bundle.EntryByTLD(TLD)
if template == nil {
return nil, nil
}
var err error
entry := new(mapper.Entry)
entry.Fields = make(map[string]mapper.Field)
baseField := make(map[string][]string)
relatedField := make(map[string]map[string][]string)
// Loads fields with constant values
for index, field := range template.Fields {
if len(field.Value) != 0 && len(field.Related) == 0 &&
len(field.RelatedBy) == 0 && len(field.RelatedTo) == 0 {
entry.Fields[index] = mapper.Field{
Key: field.Key,
Value: field.Value,
Format: field.Format,
Multiple: field.Multiple,
Hide: field.Hide,
ReplacedBy: field.ReplacedBy,
}
}
}
// Loads base fields (non related)
for index, field := range template.Fields {
// Detect base field
if len(field.Value) == 0 && len(field.Related) != 0 &&
(len(field.RelatedBy) == 0 || len(field.RelatedTo) == 0) {
// if baseField not loaded, do it
if len(baseField) == 0 {
baseField, err = storage.dataStore.Search(field.Related, query)
if err != nil {
return nil, err
}
if len(baseField) == 0 {
return nil, nil
}
}
value := []string{}
// collects all values into value
for _, item := range field.Name {
if result, ok := baseField[item]; ok {
value = append(value, result...)
}
}
entry.Fields[index] = mapper.Field{
Key: field.Key,
Value: value,
Format: field.Format,
Multiple: field.Multiple,
Hide: field.Hide,
ReplacedBy: field.ReplacedBy,
}
}
}
// Loads related records
for index, field := range template.Fields {
// Detect related fields
if len(field.RelatedBy) != 0 && len(field.RelatedTo) != 0 && len(field.Related) != 0 {
value := []string{}
queryRelated := strings.Join(baseField[field.Related], "")
// if non-related field from specified type/table
if len(field.Value) != 0 {
queryRelated = field.Value[0]
}
// if field not cached, do it
if _, ok := relatedField[field.Related]; ok == false {
if field.Multiple {
relatedField[field.Related], err = storage.dataStore.SearchMultiple(
field.RelatedTo,
field.RelatedBy,
queryRelated,
)
if err != nil {
return nil, err
}
} else {
relatedField[field.Related], err = storage.dataStore.SearchRelated(
field.RelatedTo,
field.RelatedBy,
queryRelated,
)
if err != nil {
return nil, err
}
}
}
// collects all values into value
for _, item := range field.Name {
if result, ok := relatedField[field.Related][item]; ok {
value = append(value, result...)
}
}
entry.Fields[index] = mapper.Field{
Key: field.Key,
Value: value,
Format: field.Format,
Multiple: field.Multiple,
Hide: field.Hide,
ReplacedBy: field.ReplacedBy,
}
}
}
return entry, nil
}
// detachTLD - isolates TLD part from a query
func detachTLD(query string) (TLD string) {
parts := strings.Split(query, ".")
if len(parts) > 1 {
TLD = parts[len(parts)-1]
}
return
}
// prepares join and multiple actions in the answer
func prepareAnswer(entry *mapper.Entry, keys []string) (answer string) {
for _, index := range keys {
key := entry.Fields[index].Key
if strings.Contains(entry.Fields[index].Format, "{idn}") {
entry.Fields[index] = decodeIDN(entry.Fields[index])
}
if entry.Fields[index].Multiple {
for _, value := range entry.Fields[index].Value {
if entry.Fields[index].Hide && value == "" ||
entry.Fields[index].ReplacedBy != "" && isNotEmptyField(entry, entry.Fields[index].ReplacedBy) {
continue
}
if entry.Fields[index].Format != "" {
value = handleTags(entry.Fields[index].Format, []string{value})
}
answer = strings.Join([]string{answer, key, value, "\n"}, "")
}
} else {
var value string
if entry.Fields[index].Format != "" {
value = handleTags(entry.Fields[index].Format, entry.Fields[index].Value)
} else {
value = strings.Trim(strings.Join(entry.Fields[index].Value, " "), " ")
}
if entry.Fields[index].Hide && value == "" ||
entry.Fields[index].ReplacedBy != "" && isNotEmptyField(entry, entry.Fields[index].ReplacedBy) {
continue
}
answer = strings.Join([]string{answer, key, value, "\n"}, "")
}
}
return answer
}
func isNotEmptyField(entry *mapper.Entry, index string) bool {
for _, value := range entry.Fields[index].Value {
if value != "" {
return true
}
}
return false
}
// decodes IDN names to Unicode and adds it to value
func decodeIDN(field mapper.Field) mapper.Field {
for _, item := range field.Value {
idnItem, err := idna.ToUnicode(item)
if err == nil && idnItem != item {
field.Value = append(
field.Value,
strings.Replace(field.Format, "{idn}", idnItem, 1),
)
}
}
field.Format = ""
return field
}
// handle all tags defined in format string
func handleTags(format string, value []string) string {
// template of date to parse
const (
shortDateFormat = "2006.01.02"
longDateFormat = "2006-01-02 15:04:05"
)
for _, item := range value {
if strings.Contains(format, "{date}") || strings.Contains(format, "{shortdate}") {
buildTime, err := time.Parse(longDateFormat, item)
if err != nil && len(strings.TrimSpace(item)) == 0 {
buildTime = time.Now()
}
if strings.Contains(format, "{date}") {
format = strings.Replace(format, "{date}", buildTime.Format(time.RFC3339), 1)
} else {
format = strings.Replace(format, "{shortdate}", buildTime.Format(shortDateFormat), 1)
}
}
format = strings.Replace(format, "{string}", item, 1)
}
format = strings.NewReplacer("{string}", "", "{date}", "", "{shortdate}", "").Replace(format)
return strings.Trim(format, ". ")
}