Initial 423down proxy service

2026-05-12 07:58:30 +00:00
commit 6e6e836d09
14 changed files with 865 additions and 0 deletions
@@ -0,0 +1,138 @@
+package main
+
+import (
+	"encoding/json"
+	"errors"
+	"net/http"
+	"time"
+
+	"github.com/dgraph-io/badger/v4"
+)
+
+const cookieDBKey = "cookie:423down"
+
+var errCookieNotFound = errors.New("cookie not found")
+
+type DB struct {
+	client *badger.DB
+}
+
+func NewDB(path string) (*DB, error) {
+	db, err := badger.Open(badger.DefaultOptions(path))
+	if err != nil {
+		return nil, err
+	}
+	return &DB{
+		client: db,
+	}, nil
+}
+
+func (d *DB) GetArticleHtml(articleID string) (string, error) {
+	var valueCopy []byte
+	err := d.client.View(func(txn *badger.Txn) error {
+		item, err := txn.Get([]byte("article:" + articleID))
+		if err != nil {
+			return err
+		}
+
+		return item.Value(func(val []byte) error {
+			valueCopy = append(valueCopy, val...)
+			return nil
+		})
+	})
+
+	if err != nil {
+		return "", err
+	}
+
+	return string(valueCopy), nil
+}
+
+func (d *DB) SetArticleHtml(articleID string, html string, ttl time.Duration) error {
+	if ttl <= 0 {
+		return errors.New("ttl 必须大于 0")
+	}
+	return d.client.Update(func(txn *badger.Txn) error {
+		entry := badger.NewEntry([]byte("article:"+articleID), []byte(html)).WithTTL(ttl)
+		return txn.SetEntry(entry)
+	})
+}
+
+// GetCookie 读取缓存中的登录 Cookie。
+func (d *DB) GetCookie() ([]*http.Cookie, error) {
+	var valueCopy []byte
+	err := d.client.View(func(txn *badger.Txn) error {
+		item, err := txn.Get([]byte(cookieDBKey))
+		if err != nil {
+			return err
+		}
+
+		return item.Value(func(val []byte) error {
+			valueCopy = append(valueCopy, val...)
+			return nil
+		})
+	})
+	if errors.Is(err, badger.ErrKeyNotFound) {
+		return nil, errCookieNotFound
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	var cookies []*http.Cookie
+	if err := json.Unmarshal(valueCopy, &cookies); err != nil {
+		return nil, err
+	}
+	if len(cookies) == 0 {
+		return nil, errCookieNotFound
+	}
+
+	return cookies, nil
+}
+
+// SetCookie 保存登录 Cookie，有效期固定为 7 天。
+func (d *DB) SetCookie(cookies []*http.Cookie) error {
+	if len(cookies) == 0 {
+		return errors.New("cookies 不能为空")
+	}
+
+	data, err := json.Marshal(cookies)
+	if err != nil {
+		return err
+	}
+
+	return d.client.Update(func(txn *badger.Txn) error {
+		entry := badger.NewEntry([]byte(cookieDBKey), data).WithTTL(cookieCacheTTL)
+		return txn.SetEntry(entry)
+	})
+}
+
+// AddCookie 增加或更新单个登录 Cookie，并刷新 7 天有效期。
+func (d *DB) AddCookie(cookie *http.Cookie) error {
+	if cookie == nil {
+		return errors.New("cookie 不能为空")
+	}
+
+	cookies, err := d.GetCookie()
+	if err != nil && !errors.Is(err, errCookieNotFound) {
+		return err
+	}
+
+	replaced := false
+	for i, existingCookie := range cookies {
+		if existingCookie.Name == cookie.Name {
+			cookies[i] = cookie
+			replaced = true
+			break
+		}
+	}
+	if !replaced {
+		cookies = append(cookies, cookie)
+	}
+
+	return d.SetCookie(cookies)
+}
+
+func (d *DB) Close() error {
+	return d.client.Close()
+}