[Enhance] API & LinkPlay & something else

- Add song names for getting the score list (For API)
- Try to ensure thread safety in Link Play (twice again)
- Small change about database timeout
- Have a try to use `nginx` and `gevent` (Yes. I ensure it works well. This will not be viewed as a formal and necessary update.)

latest version/core/download.py

@@ -3,6 +3,8 @@ from functools import lru_cache
 from json import loads
 from time import time
 
+from flask import url_for
+
 from .constant import Constant
 from .error import NoAccess
 from .user import User
@@ -118,7 +120,6 @@ class UserDownload:
                 prefix += '/'
             return prefix + self.song_id + '/' + self.file_name + '?t=' + self.token
         else:
-            from flask import url_for
             return url_for('download', file_path=self.song_id + '/' + self.file_name, t=self.token, _external=True)
 
     @property

latest version/core/score.py

@@ -128,7 +128,7 @@ class Score:
         return self.rating
 
     def to_dict(self) -> dict:
-        return {
+        r = {
             "rating": self.rating,
             "modifier": self.modifier,
             "time_played": self.time_played,
@@ -142,6 +142,9 @@ class Score:
             "difficulty": self.song.difficulty,
             "song_id": self.song.song_id
         }
+        if self.song.song_name is not None:
+            r["song_name"] = self.song.song_name
+        return r
 
 
 class UserScore(Score):
@@ -569,3 +572,12 @@ class UserScoreList:
         x = Sql(self.c).select('best_score', query=self.query)
 
         self.scores = [UserScore(self.c, self.user).from_list(i) for i in x]
+
+    def select_song_name(self) -> None:
+        '''为所有成绩中的song_id查询song_name'''
+        if self.scores is None:
+            return
+        for score in self.scores:
+            self.c.execute(
+                '''select name from chart where song_id = ?''', (score.song.song_id,))
+            score.song.song_name = self.c.fetchone()[0]

latest version/core/song.py

@@ -8,6 +8,7 @@ class Chart:
         self.c = c
         self.set_chart(song_id, difficulty)
         self.defnum: int = None
+        self.song_name: str = None
 
     def to_dict(self) -> dict:
         return {

latest version/core/sql.py

@@ -19,7 +19,7 @@ class Connect:
         self.file_path = file_path
 
     def __enter__(self):
-        self.conn = sqlite3.connect(self.file_path)
+        self.conn = sqlite3.connect(self.file_path, timeout=10)
         self.c = self.conn.cursor()
         return self.c