关于我们、注册协议、购买协议，则显示默认的

app/Http/Controllers/Api/AgentInfoController.php

@@ -14,7 +14,13 @@ class AgentInfoController extends Controller
 		if (!in_array($type, ['about', 'reg_protocol', 'buy_protocol'])) {
 			return $this->error('参数无效');
 		}
-		$about = AgentInfo::where('agent_id', $this->agent_id)->value($type);
-		return $this->success([$type => $about]);
+		$value = AgentInfo::where('agent_id', $this->agent_id)->value($type);
+
+		# 如果未设置关于我们、注册协议、购买协议，就显示默认的
+		if (empty($value) || strlen($value) < 10) {
+			$value = admin_setting('common_' . $type);
+		}
+
+		return $this->success([$type => $value]);
 	}
 }