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main.go
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main.go
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package main
import (
"encoding/base64"
"encoding/binary"
"flag"
"fmt"
"html"
"html/template"
"log"
"net/http"
"github.com/bwmarrin/discordgo"
bolt "github.com/coreos/bbolt"
)
const (
comiketID = "398275988116602902"
reitaisaiID = "398389744721199104"
m3ID = "398390029849722881"
)
var (
db *bolt.DB
templates = template.Must(template.ParseGlob("tmpl/*.html"))
)
// util
// itob returns an 8-byte big endian representation of v.
func itob(v uint64) []byte {
b := make([]byte, 8)
binary.BigEndian.PutUint64(b, v)
return b
}
// reverse returns a slice of messages reversed (e.g [a, b, c] => [c, b, a])
func reverse(a []*discordgo.Message) []*discordgo.Message {
var len = len(a)
var halfLen = len / 2
for i := 0; i < halfLen; i++ {
var temp = a[i]
a[i] = a[len-1-i]
a[len-1-i] = temp
}
return a
}
// database
func messages(db *bolt.DB, bucket string) ([]string, error) {
var s []string
err := db.View(func(tx *bolt.Tx) error {
messages := tx.Bucket([]byte(bucket))
messages.ForEach(func(k, v []byte) error {
decoded, err := base64.StdEncoding.DecodeString(string(v))
if err != nil {
fmt.Println("decode error:", err)
return err
}
s = append(s, string(decoded))
return nil
})
if err != nil {
fmt.Println("error iterating over messages:", err)
return err
}
})
if err != nil {
fmt.Printf("viewing bucket failed: %s\n:", err)
return nil, err
}
return s, nil
}
// http
func render(w http.ResponseWriter, tmpl string, d interface{}) {
err := templates.ExecuteTemplate(w, tmpl+".html", d)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}
func home(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "<html>this site scrapes the doujinstyle discord<br><a href='/comiket'>comiket</a>, <a href='/reitaisai'>reitaisai</a>, <a href='/m3'>m3</a><br>this server doesn't host SHIT")
return
}
func handler(db *bolt.DB) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var b string
switch html.EscapeString(r.URL.Path[1:]) {
case "comiket":
b = "messages"
case "m3":
b = "m3"
case "reitaisai":
b = "reitaisai"
default:
http.Error(w, "not a valid URL idiot", http.StatusNotFound)
}
data, err := messages(db, b)
if err != nil {
log.Printf("viewing %s: %s\n", b, err)
}
render(w, "messages", data)
})
}
func main() {
var tk = flag.String("token", "cock", "Discord API token (user)")
flag.Parse()
if *tk == "cock" {
fmt.Println("=> you didn't enter a token. use ./disc94 -token='token'")
return
}
fmt.Println("=> creating new session")
discord, err := discordgo.New(*tk)
if err != nil {
log.Panicln("discordgo:", err)
return
}
fmt.Println("=> opening connection on session")
err = discord.Open()
if err != nil {
log.Panicln("opening connection:", err)
}
fmt.Println("=> DATABASEDATABASE")
db, err := bolt.Open("my.db", 0600, nil)
if err != nil {
log.Fatal(err)
}
defer db.Close()
fmt.Println("=> adding handlers")
discord.AddHandler(func(s *discordgo.Session, m *discordgo.MessageCreate) {
var bucket string
if m.Author.ID == s.State.User.ID {
return
}
switch m.ChannelID {
case comiketID:
bucket = "messages"
case reitaisaiID:
bucket = "reitaisai"
case m3ID:
bucket = "m3"
default:
return
}
b64 := base64.StdEncoding.EncodeToString([]byte(m.Content))
err := db.Update(func(tx *bolt.Tx) error {
messages, err := tx.CreateBucketIfNotExists([]byte(bucket))
if err != nil {
log.Printf("create bucket: %s", err)
return err
}
id, err := messages.NextSequence()
if err != nil {
log.Printf("finding next sequence: %s", err)
return err
}
err = messages.Put(itob(id), []byte(b64))
return err
})
if err != nil {
fmt.Printf("=> failed to put message in DB: %s", err)
}
fmt.Println(m.Content)
return
})
fmt.Println("=> setting up http")
http.HandleFunc("/", home)
http.Handle("/comiket", handler(db))
http.Handle("/m3", handler(db))
http.Handle("/reitaisai", handler(db))
http.Handle("/img/", http.StripPrefix("/img/", http.FileServer(http.Dir("img"))))
fmt.Println("scraping bot is now running. press CTRL-C to exit.")
log.Fatal(http.ListenAndServe(":1337", nil))
// Close connections
discord.Close()
return
}