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io.go
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io.go
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// Copyright 2021 Changkun Ou. All rights reserved.
// Use of this source code is governed by a MIT
// license that can be found in the LICENSE file.
package short
import (
"context"
"log"
"os"
"time"
"changkun.de/x/redir/internal/config"
"changkun.de/x/redir/internal/db"
"changkun.de/x/redir/internal/models"
"changkun.de/x/redir/internal/utils"
"gopkg.in/yaml.v3"
)
type iofmt struct {
Short []models.RedirIndex `yaml:"short"`
Random []models.RedirIndex `yaml:"random"`
}
// ImportFile parses and imports the given file into redir database.
func ImportFile(fname string) {
b, err := os.ReadFile(fname)
if err != nil {
log.Fatalf("cannot read import file: %v\n", err)
}
var d iofmt
err = yaml.Unmarshal(b, &d)
if err != nil {
log.Fatalf("cannot unmarshal the imported file: %v\n", err)
}
ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
defer cancel()
for _, info := range d.Short {
r := &models.Redir{
Alias: info.Alias,
URL: info.URL,
Kind: models.KindShort,
Private: info.Private,
ValidFrom: info.ValidFrom,
}
err = Cmd(ctx, OpUpdate, r)
if err != nil {
err = Cmd(ctx, OpCreate, r)
if err != nil {
log.Printf("cannot import alias %v: %v\n", info.Alias, err)
}
}
}
for _, info := range d.Random {
// This might conflict with existing ones, it should be fine
// at the moment, the user of redir can always the command twice.
if config.Conf.R.Length <= 0 {
config.Conf.R.Length = 6
}
alias := utils.Randstr(config.Conf.R.Length)
r := &models.Redir{
Alias: alias,
URL: info.URL,
Kind: models.KindRandom,
Private: info.Private,
ValidFrom: info.ValidFrom,
}
err = Cmd(ctx, OpUpdate, r)
if err != nil {
for i := 0; i < 10; i++ { // try 10x maximum
err = Cmd(ctx, OpCreate, r)
if err != nil {
log.Printf("cannot create alias %v: %v\n", alias, err)
continue
}
break
}
}
}
}
// DumpFile dumps the redir data into a given file in YAML format.
func DumpFile(fname string) {
ctx, cancel := context.WithTimeout(context.Background(), time.Second*30)
defer cancel()
s, err := db.NewStore(ctx, config.Conf.Store)
if err != nil {
log.Println("cannot create a new store: %w", err)
return
}
defer s.Close()
var idxes iofmt
pageNum := int64(1)
pageSize := int64(100)
for {
idx, _, err := s.FetchAliasAll(ctx, false, models.KindShort, pageSize, pageNum)
if err != nil {
log.Printf("cannot fetch aliases, page num: %d, page siz: %d", pageNum, pageSize)
return
}
if len(idx) == 0 {
break
}
idxes.Short = append(idxes.Short, idx...)
pageNum++
}
pageNum = 1
pageSize = 100
for {
idx, _, err := s.FetchAliasAll(ctx, false, models.KindRandom, pageSize, pageNum)
if err != nil {
log.Printf("cannot fetch aliases, page num: %d, page siz: %d", pageNum, pageSize)
return
}
if len(idx) == 0 {
break
}
idxes.Random = append(idxes.Random, idx...)
pageNum++
}
b, err := yaml.Marshal(idxes)
if err != nil {
log.Printf("cannot marshal aliases into yaml format: %v", err)
return
}
err = os.WriteFile(fname, b, os.ModePerm)
if err != nil {
log.Printf("cannot write to file %s: %v", fname, err)
return
}
log.Println("Done.")
}