2ch.go

package main

import (
	"crypto/hmac"
	"crypto/sha256"
	"encoding/hex"
	"fmt"
	"io/ioutil"
	"net/http"
	"net/url"
	"strings"
)

// HMKey is common
var HMKey = "hO2QHdapzbqbTFOaJgZTKXgT2gWqYS"

// AppKey is get 2chApiWiki(http://prokusi.wiki.fc2.com/wiki)
var AppKey = "JYW2J6wh9z8p8xjGFxO3M2JppGCyjQ"

// CT is unique 10 length number
var CT = "1234567890"

// serverName is URL SubDomein (ex.http://***.2ch.net/...)
var serverName = "echo"

// boardName is (http://foo.2ch.net/***/...)
var boardName = "unix"

// threadId is (http://foo.2ch.net/bar/***/...)
var threadID = "1455436351"

// セッションID取得
func authenticate() string {
	message := AppKey + CT

	//Get HB String
	key := []byte(HMKey)
	h := hmac.New(sha256.New, key)
	h.Write([]byte(message))
	HB := hex.EncodeToString(h.Sum(nil))

	//POST Start
	client := &http.Client{}
	data := url.Values{"ID": {""}, "PW": {""}, "KY": {AppKey}, "CT": {CT}, "HB": {HB}}

	req, _ := http.NewRequest(
		"POST",
		"https://api.2ch.net/v1/auth/",
		strings.NewReader(data.Encode()),
	)
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	//add header
	req.Header.Set("User-Agent", "Mozilla/3.0 (compatible; JaneStyle/3.83)")
	req.Header.Set("X-2ch-UA", "JaneStyle/3.83")

	resp, _ := client.Do(req)
	body, _ := ioutil.ReadAll(resp.Body)
	defer resp.Body.Close()

	arr := strings.Split(string(body), ":")
	sid := (arr[1])

	//return Session-ID
	return (sid)
}

// 取得したsidを使用し、DATを取得
func getDAT(serverName string, boardName string, threadID string, sid string) string {
	message := "/v1/" + serverName + "/" + boardName + "/" + threadID + sid + AppKey
	URL := "https://api.2ch.net/v1/" + serverName + "/" + boardName + "/" + threadID
	key := []byte(HMKey)
	h := hmac.New(sha256.New, key)
	h.Write([]byte(message))
	hobo := hex.EncodeToString(h.Sum(nil))
	client := &http.Client{}
	data := url.Values{"sid": {sid}, "hobo": {hobo}, "appkey": {AppKey}}

	req, _ := http.NewRequest(
		"POST",
		URL,
		strings.NewReader(data.Encode()),
	)
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	//add header
	req.Header.Set("User-Agent", "Mozilla/3.0 (compatible; JaneStyle/3.83)")

	resp, _ := client.Do(req)
	body, _ := ioutil.ReadAll(resp.Body)
	defer resp.Body.Close()

	//return body
	return (string(body))
}

// DATの読み込み
func main() {
	sid := authenticate()
	dat := getDAT(serverName, boardName, threadID, sid)

	fmt.Println(dat)
}