update: 增加了对Deta的数据库支持和修改了一点文档

src/config.py

@@ -4,6 +4,7 @@
 # @Development Tool: PyCharm
 # @Create Time: 2022/9/11
 # @File Name: config.py
+import os
 
 
 class Config:
@@ -12,4 +13,5 @@ class Config:
     sqlite3 -> sqlite3   (default)
     mysql -> user:pwd@host:port/db
     """
-    database = "sqlite3"  # Database type
+    database = os.getenv('COUNTER_DB') or "sqlite3"  # Database type
+    DETA = eval(os.getenv('DETA_RUNTIME').title())  # mark Deta

src/db/__init__.py

@@ -12,13 +12,20 @@ from src.config import Config
 
 database = Config.database  # operator
 
-if not os.path.exists('./src/db/data.sqlite') and \
-        Config.database == 'sqlite3':
+
+def download_file(path: str):
     print('Downloading database file. Please wait...')
     file_url = 'https://static.rtast.cn/data.sqlite'
-    urlretrieve(file_url, './src/db/data.sqlite')  # standard lib for downloading file
+    urlretrieve(file_url, path)  # standard lib for downloading file
     print('Download database file successfully.')
 
+
+if Config.DETA and Config.database == 'sqlite3':
+    if not os.path.exists('/tmp/data.sqlite'):
+        download_file('/tmp/data.sqlite')
+elif not Config.DETA and Config.database == 'sqlite3':
+    download_file('./src/db/data.sqlite')
+
 if Config.database == 'sqlite3':
     from src.db.db import SQLite as Database
 

src/db/db.py

@@ -56,7 +56,10 @@ class BaseSQL:
 class SQLite(BaseSQL):
     def __init__(self):
         super().__init__()
-        self.conn = operator.connect('./src/db/data.sqlite')
+        if Config.DETA:
+            self.conn = operator.connect('/tmp/data.sqlite')
+        else:
+            self.conn = operator.connect('./src/db/data.sqlite')
         self.cursor = self.conn.cursor()