diff --git a/app.py b/app.py
index 61b41ca..8b6785d 100644
--- a/app.py
+++ b/app.py
@@ -1,4 +1,4 @@
-from flask import Flask
+from flask import Flask, jsonify
 # from dotenv import load_dotenv
 # load_dotenv()
 import os, hashlib
@@ -7,6 +7,8 @@ from sqlalchemy.orm import sessionmaker
 from utils.pgclass import Base, SQLuser
 from utils.platform_consts import pList_root
 from utils.setting_loader import loadset, typechecker
+from utils import logger
+from bcrypt import checkpw, gensalt, hashpw
 # blueprints
 from blueprints.article import article
 from blueprints.log     import log
@@ -40,14 +42,14 @@ for s in settings:
 engine = create_engine('postgresql+psycopg2://%s:%s@%s:%s/%s'%(PG_USER, PG_PASS, PG_HOST, PG_PORT, PG_NAME))
 Base.metadata.create_all(engine)
 # root checker
-pwhash = hashlib.sha512(PLATFORM_ROOT_PASSWORD.encode()).hexdigest()
+pwhash = hashpw(PLATFORM_ROOT_PASSWORD.encode("utf-8"), gensalt()).decode("utf-8")
 rootperm = pList_root
 Session = sessionmaker(bind=engine)
 session = Session()
 root = session.query(SQLuser).filter(SQLuser.user=="root").first()
 if (root is None):
     session.add(SQLuser(user="root",password=pwhash, permission=rootperm))
-elif (root.password != pwhash or root.permission != rootperm):
+elif ((not checkpw(PLATFORM_ROOT_PASSWORD.encode("utf-8"), root.password.encode("utf-8"))) or root.permission != rootperm):
     session.delete(root)
     session.add(SQLuser(user="root",password=pwhash, permission=rootperm))
 session.commit()
@@ -69,11 +71,19 @@ app.register_blueprint(article, url_prefix = "/article")
 app.register_blueprint(log    , url_prefix = "/log")
 app.register_blueprint(admin  , url_prefix = "/admin")
 
+# logger
+logger.logger(engine, "server.start", "Server is running")
+
 # index
 @app.route("/", methods = ["GET", "POST"])
 def index():
     return "Hello! World!<br>Shirakami Fubuki: cutest fox!!!"
 
+# global error handler
+# @app.errorhandler(Exception)
+# def handle_exception(e):
+#     return jsonify({"error": "Internal server error"}), 500
+
 # app run
 if __name__ == "__main__":
     app.run(host="0.0.0.0", port=5000, debug=False)
\ No newline at end of file
diff --git a/blueprints/admin.py b/blueprints/admin.py
index 05c28ad..c731dcb 100644
--- a/blueprints/admin.py
+++ b/blueprints/admin.py
@@ -1,19 +1,15 @@
 from flask import Blueprint, request, current_app, abort, jsonify, make_response, abort
-import jwt, os, time, hashlib, math
+import jwt, os, time, math
 from utils import pgclass, setting_loader, logger
-from utils.platform_consts import pList, platform_setting_model
+from utils.platform_consts import pList, pList_root
 from functools import wraps
 from sqlalchemy.orm import sessionmaker
+from sqlalchemy import desc
+from bcrypt import hashpw, gensalt, checkpw
 
 admin = Blueprint("admin", __name__)
 
 # jwt = {"id":user.id, "user":user.user, "exp":time.time}
-# permission list
-# - usermgr (user management, add, remove, edit)
-# - article.read
-# - article.pend
-# - article.del
-# - setting.edit
 
 # auth decorator
 def role_required(permreq: list):
@@ -22,11 +18,13 @@ def role_required(permreq: list):
         def decorated_function(*args, **kwargs):
             # get data
             key = os.getenv("JWT_KEY", None)
-            jwtsession = str(request.cookies.get("token", None))
+            jwtsession = request.cookies.get("token", None)
             if jwtsession == None: return "You do not have permission to view this page.", 401
-            try: jwtdata = jwt.decode(jwtsession, key = key, algorithms = ["HS256"])
+            jwtsession = str(jwtsession)
+            try: jwtdata = jwt.decode(jwt = jwtsession, key = key, algorithms = ["HS256"])
             except jwt.exceptions.ExpiredSignatureError: return "Token expired!", 401
-            except: return abort(500)
+            except jwt.exceptions.DecodeError: return "Invalid token!", 401
+            if "id" not in jwtdata or "user" not in jwtdata: return "Invalid token!", 401
             
             # db
             db = current_app.shared_resource.engine
@@ -38,21 +36,34 @@ def role_required(permreq: list):
             if res is None: return "You do not have permission to view this page.", 401
 
             # permission check
-            permissionList = res.permission
-            for p in permreq:
+            permissionList = list(set(res.permission))
+            for p in permissionList: # 檢查用戶JWT是否有不合法的權限名稱
+                if p not in pList_root: return "The user has invalid permission.", 402
+            for p in list(set(permreq)):
                 if p not in permissionList: return "You do not have permission to view this page.", 402
 
             # return
             return f(*args, **kwargs)
         return decorated_function
     return decorator
+# get operator
+def getopuser(session, cookie):
+    table = pgclass.SQLuser
+    jwtsession = str(cookie)
+    try: opuser = jwt.decode(jwt = jwtsession, key = os.getenv("JWT_KEY"), algorithms = ["HS256"])
+    except jwt.exceptions.ExpiredSignatureError: return "Token expired!", 401
+    except jwt.exceptions.DecodeError: return "Invalid token!", 401
+    if "id" not in opuser or "user" not in opuser: return "Invalid token!", 401
+    opuser = session.query(table).filter(table.user==opuser["user"],table.id==opuser["id"]).first()
+    return opuser, None
 
 # login
 @admin.route("/login", methods=["POST"])
 def login():
     # args
+    if "username" not in request.json or "password" not in request.json: return "Arguments error", 400
     username = str(request.json["username"])
-    password = hashlib.sha512(str(request.json["password"]).encode()).hexdigest()
+    password = str(request.json["password"])
 
     # variables
     settings = setting_loader.loadset()
@@ -61,43 +72,48 @@ def login():
     # db
     db = current_app.shared_resource.engine
     Session = sessionmaker(bind=db)
-    session = Session()
     table = pgclass.SQLuser
-
+    with Session() as session: u = session.query(table).filter(table.user==username).first()
     # auth
-    u = session.query(table).filter(table.user==username, table.password==password).first()
-    session.close()
-    if u is None: return "Login Failed", 400
+    if u is None: return "Login Failed", 401 # 找不到用戶
+    if not checkpw(password.encode("utf-8"), u.password.encode("utf-8")): return "Login Failed", 401 # 密碼沒法跟hash對上
     
     # jwt
     key = os.getenv("JWT_KEY", None)
     if key is None: return abort(500)
-    jwtdata = {"id": u.id, "user":username, "exp":str(math.floor(time.time() + exptime))}
+    jwtdata = {"id": u.id, "user":username, "exp":int(math.floor(time.time() + exptime))}
     jwtdata = jwt.encode(payload = jwtdata, key = str(key), algorithm = "HS256")
 
     # logger
-    logger.logger(db, "admin", "User:%s logined"%username)
+    logger.logger(db, "login", "User:%s logined"%username)
 
     # cookie
     r = make_response("Access Granted")
-    r.set_cookie("token", jwtdata) # , httponly=True)
+    r.set_cookie("token", jwtdata)
     return r
 
+@admin.route("me", methods=["GET"])
+@role_required([])
+def user_me():
+    db = current_app.shared_resource.engine
+    Session = sessionmaker(bind=db)
+    with Session() as session:
+        opuser, err = getopuser(session, request.cookies.get("token"))
+        if err is not None: return opuser, err
+    return jsonify({"id":opuser.id, "user":opuser.user, "permission":opuser.permission})
+
 ####################
 #     User Area    #
 ####################
-# list / get / (admin/)me / add / delete
+# list / get / add / delete
 @admin.route("user/list", methods={"GET"})
 @role_required([])
 def user_list():
     db = current_app.shared_resource.engine
     Session = sessionmaker(bind=db)
-    session = Session()
     table = pgclass.SQLuser
-    
-    users = session.query(table).all()
+    with Session() as session: users = session.query(table).all()
     res = [ {"id":u.id, "user":u.user, "permission":u.permission} for u in users ]
-
     return jsonify(res)
 
 @admin.route("user/get/<int:id>", methods=["GET"])
@@ -105,63 +121,48 @@ def user_list():
 def user_get(id:int):
     db = current_app.shared_resource.engine
     Session = sessionmaker(bind=db)
-    session = Session()
     table = pgclass.SQLuser
-    
-    users = session.query(table).filter(table.id==int(id)).all()
+    with Session() as session: users = session.query(table).filter(table.id==int(id)).all()
     res = [ {"id":u.id, "user":u.user, "permission":u.permission} for u in users ]
 
     return jsonify(res)
 
-@admin.route("me", methods=["GET"])
-@role_required([])
-def user_me():
-    db = current_app.shared_resource.engine
-    Session = sessionmaker(bind=db)
-    session = Session()
-    table = pgclass.SQLuser
-    
-    opuser = jwt.decode(jwt=request.cookies.get("token"), key=os.getenv("JWT_KEY"), algorithms="HS256")
-    opuser = session.query(table).filter(table.user==opuser["user"],table.id==opuser["id"]).first()
-
-    return jsonify({"id":opuser.id, "user":opuser.user, "permission":opuser.permission})
-
 @admin.route("user/add", methods=["POST"])
 @role_required(["usermgr"])
 def user_add():
     # db 
     db = current_app.shared_resource.engine
     Session = sessionmaker(bind=db)
-    session = Session()
     table = pgclass.SQLuser
-    
-    # user who requested
-    opuser = jwt.decode(jwt=request.cookies.get("token"), key=os.getenv("JWT_KEY"), algorithms="HS256")
-    opuser = session.query(table).filter(table.user==opuser["user"],table.id==opuser["id"]).first()
-    if opuser is None: return "You don't have permission to view this page!", 401
-    # payload
-    username = str(request.json["username"])
-    password = str(request.json["password"])
-    permission = list(request.json["permission"])
-    # check username and password
-    if username == None or len(username) == 0 or password is None or len(password) == 0: return "Invalid Username or Password!", 401
-    # check permission list
-    for p in permission:
-        if p not in pList: return "Invalid Permission", 401
-        if p not in opuser.permission: return "You don't have the permission: %s"%p, 401
-    
-    # add
-    users = session.query(table).filter(table.user==username).first()
-    if users is None: # check whether the user is exist
-        pwhash = hashlib.sha512(password.encode()).hexdigest()
-        session.add(table(user=username, password=pwhash, permission=permission))
-        session.commit()
-        logger.logger(db, "admin", "User:%s created a new user:%s"%(opuser.user, username)) # logger
-        session.close()
-        return jsonify({"user":username, "permission":permission})
-    else:
-        session.close()
-        return "User is exist!"
+    with Session() as session:
+        # user who requested
+        opuser, err = getopuser(session, request.cookies.get("token"))
+        if err is not None: return opuser, err
+        if opuser is None: return "You don't have permission to view this page!", 402
+        
+        # payload
+        if "username" not in request.json or "password" not in request.json or \
+            "permission" not in request.json or not(isinstance(request.json["permission"], list)): return "Arguments error", 400
+        username = str(request.json["username"])
+        password = str(request.json["password"])
+        permission = list(set([ str(p) for p in list(request.json["permission"]) ]))
+        # check username and password
+        if username == None or len(username) == 0 or password is None or len(password) == 0: return "Invalid Username or Password!", 400
+        # check permission list
+        for p in permission:
+            if p not in pList: return "Invalid Permission", 400 # 如果添加的權限名稱不合法
+            if p not in opuser.permission: return "You don't have the permission: %s"%p, 402 # 如果用戶本身不具有相同權限
+
+        # add
+        users = session.query(table).filter(table.user==username).first()
+        if users is None: # check whether the user already exist
+            pwhash = hashpw(password.encode("utf-8"), gensalt()).decode("utf-8")
+            session.add(table(user=username, password=pwhash, permission=permission))
+            session.commit()
+            logger.logger(db, "user.create", "User:%s created a new user:%s"%(opuser.user, username)) # logger
+            return jsonify({"user":username, "permission":permission})
+        else:
+            return "User already exist!"
 
 @admin.route("user/delete/<int:id>", methods=["DELETE"])
 @role_required(["usermgr"])
@@ -169,34 +170,150 @@ def user_del(id:int):
     # db 
     db = current_app.shared_resource.engine
     Session = sessionmaker(bind=db)
-    session = Session()
     table = pgclass.SQLuser
-    
-    # user who requested
-    opuser = jwt.decode(jwt=request.cookies.get("token"), key=os.getenv("JWT_KEY"), algorithms="HS256")
-    opuser = session.query(table).filter(table.user==opuser["user"],table.id==opuser["id"]).first()
-    if opuser is None: return "You don't have permission to view this page!", 401
-    
-    # check root
-    tguser = session.query(table).filter(table.id==id).first()
-    if tguser is None: return "User is not exist", 400
-    if tguser.user == "root": return "You cannot delete user:root", 400
-    
-    # delete
-    session.delete(tguser)
-    session.commit()
 
-    logger.logger(db, "admin", "User:%s deleted an user:%s"%(opuser.user, tguser.user)) # logger
-    session.close()
+    with Session() as session:
+        # user who requested
+        opuser, err = getopuser(session, request.cookies.get("token"))
+        if err is not None: return opuser, err
+        if opuser is None: return "You don't have permission to view this page!", 402
+    
+        # check root
+        tguser = session.query(table).filter(table.id==int(id)).first()
+        if tguser is None: return "User is not exist", 400
+        if tguser.user == "root": return "You cannot delete user:root", 400
+    
+        # delete
+        session.delete(tguser)
+        session.commit()
+
+        logger.logger(db, "user.delete", "User:%s deleted an user:%s"%(opuser.user, tguser.user)) # logger
     return "OK", 200
 
 ####################
 #   Article Area   #
 ####################
+# list / get / pend / delete / fileget
+
+@admin.route('article/list', methods = ["GET"])
+@role_required(["article.read"])
+def article_list():
+    # variables
+    if request.args.get("start") is None or request.args.get("count") is None or \
+        request.args.get("start").isdigit()==False or request.args.get("count").isdigit()==False: return "Arguments error", 400
+    rst = int(request.args.get("start"))
+    count = int(request.args.get("count"))
+
+    # db
+    db = current_app.shared_resource.engine
+    Session = sessionmaker(bind=db)
+    # get ctx
+    table = pgclass.SQLarticle
+    ftab = pgclass.SQLfile
+    with Session() as session: res = session.query(table).order_by(desc(table.id)).filter(table.reference == None).offset(rst).limit(count).all()
+
+    # mapping
+    res = [ {"id":r.id, "ctx":r.ctx, "igid":r.igid, "created_at":r.created_at, "mark":r.mark, "ip":r.ip,
+             "files": [ f[0] for f in session.query(ftab.id).filter(ftab.reference == r.hash).all() ] } for r in res ]
+
+    return jsonify(res), 200
+
+@admin.route("article/get/<int:id>", methods=["GET"])
+@role_required(["article.read"])
+def article_read(id:int):
+    db = current_app.shared_resource.engine
+    Session = sessionmaker(bind=db)
+    table = pgclass.SQLarticle
+    ftab  = pgclass.SQLfile
+    # get ctx
+    with Session() as session: res = session.query(table).filter(table.id == int(id)).first()
+    # mapping
+    resfn = {
+        "id":res.id, "ctx":res.ctx, "igid":res.igid, "created_at":res.created_at, "mark":res.mark, "reference":res.reference, "ip":res.ip,
+        "files": [ f[0] for f in session.query(ftab.id).filter(ftab.reference==res.hash).all() ],
+        "comment": [ c[0] for c in session.query(table.id).filter(table.reference==res.id).all() ]
+    }
+    return jsonify([resfn])
+
+@admin.route("article/delete/<int:id>", methods=["DELETE"])
+@role_required(["article.del"])
+def article_del(id:int):
+    # db
+    db = current_app.shared_resource.engine
+    Session = sessionmaker(bind=db)
+    table = pgclass.SQLarticle
+    ftab = pgclass.SQLfile
+
+    with Session() as session:
+        opuser, err = getopuser(session, request.cookies.get("token"))
+        if err is not None: return opuser, err
+
+        res = session.query(table).filter(table.id == id).first()     # 本體
+        session.query(ftab).filter(ftab.reference == res.hash).delete() # 檔案
+
+        rcl = []
+        # 留言
+        for c in session.query(table).filter(table.reference == res.id).all():
+            rcl.append(c.id)
+            # 刪留言的檔案
+            session.query(ftab).filter(ftab.reference == c.hash).delete()
+            # 刪留言
+            session.delete(c)
+        # 刪本體
+        session.delete(res)
+        # commit
+        session.commit()
+        # logger
+        logger.logger(db, "article.delete", "User:%s deleted post (id=%d with comments %s): last_status=%s"%(opuser.user, res.id, str(rcl), res.mark))
+        return "OK", 200
+
+@admin.route("article/pend/<int:id>", methods=["PATCH"])
+@role_required(["article.pend"])
+def article_pend(id:int):
+    # db
+    db = current_app.shared_resource.engine
+    Session = sessionmaker(bind=db)
+    table = pgclass.SQLarticle
+    with Session() as session:
+        # 確保文章存在
+        res = session.query(table).filter(table.id==int(id)).first()
+        if res is None: return "Post not found", 400
+
+        # 如果文章已經公開
+        if res.mark == "visible":
+            return "Post is already visible.", 400
+        elif res.mark == "pending":
+            res.mark = "visible"
+            session.commit()
+
+            # run IG Post
+
+            return "OK", 200
+        else:
+            return "Post mark error", 500
+
+@admin.route("article/file/<int:id>", methods = ["GET"])
+@role_required(["article.read"])
+def article_fileget(id:int):
+    db = current_app.shared_resource.engine
+    Session = sessionmaker(bind=db)
+
+    table = pgclass.SQLarticle
+    ftab  = pgclass.SQLfile
+    with Session() as session:
+        fres = session.query(ftab).filter(ftab.id == id).first()
+        if fres is None: return "File not found", 400       # 檢查檔案是否存在
+        article = session.query(table).filter(table.hash == fres.reference).first()
+        if article is None: return "File not found", 400    # 檢查文章本體是否存在
+    resp = make_response(fres.binary)
+    resp.headers.set("Content-Type", fres.type)
+    resp.headers.set("Content-Disposition", f"attachment; filename=file{fres.id}")
+    return resp
 
 ####################
 #   Setting Area   #
 ####################
+# get / set
 @admin.route("setting/get", methods=["GET"])
 @role_required(["setting.edit"])
 def setting_get():
diff --git a/blueprints/article.py b/blueprints/article.py
index 461a0a8..8b65f23 100644
--- a/blueprints/article.py
+++ b/blueprints/article.py
@@ -1,4 +1,4 @@
-from flask import Blueprint, current_app, request, jsonify, abort, make_response
+from flask import Blueprint, current_app, request, jsonify, make_response
 import hashlib
 import time
 import magic # apt install libmagic1 libmagic-dev -y
@@ -6,14 +6,15 @@ from utils import logger, pgclass, setting_loader
 from sqlalchemy.orm import sessionmaker
 from sqlalchemy import desc
 from protobuf_files import niming_pb2
+from google.protobuf.message import DecodeError
 
 """
 TODO:
-- admin (看文，審核文章，刪文，[新增用戶，刪除用戶](用戶管理)[V]，管理平台設定)
-- IG post
+- IG post ( Po文、刪文、只PO本體文章 )
 
 - log 的方式之後要重新設計 > 正規化
 - IP Record (deploy之前配合rev proxy)
+- gunicorn
 - 檔案完成，但是再看看要不要讓發文者持sha256存取自己發的文的檔案
 """
 
@@ -23,54 +24,47 @@ article = Blueprint('article', __name__)
 @article.route('/list', methods = ["GET"])
 def listing():
     # variables
+    if request.args.get("start") is None or request.args.get("count") is None or \
+        request.args.get("start").isdigit()==False or request.args.get("count").isdigit()==False: return "Arguments error", 400
     rst = int(request.args.get("start"))
     count = int(request.args.get("count"))
 
     # db
     db = current_app.shared_resource.engine
     Session = sessionmaker(bind=db)
-    session = Session()
+    with Session() as session:
+        # get ctx
+        table = pgclass.SQLarticle
+        ftab = pgclass.SQLfile
+        res = session.query(table.id, table.ctx, table.igid, table.created_at, table.mark, table.hash).order_by(desc(table.id)).filter(table.mark == 'visible', table.reference == None).offset(rst).limit(count).all()
 
-    # get ctx
-    table = pgclass.SQLarticle
-    ftab = pgclass.SQLfile
-    res = session.query(table.id, table.ctx, table.igid, table.created_at, table.mark, table.hash).order_by(desc(table.id)).filter(table.mark == 'visible', table.reference == None).offset(rst).limit(count).all()
+        # mapping
+        res = [ {"id":r[0], "ctx":r[1], "igid":r[2], "created_at":r[3], "mark":r[4],
+                 "files": [ f[0] for f in session.query(ftab.id).filter(ftab.reference == r[5]).all() ] } for r in res ]
 
-    # mapping
-    res = [ {"id":r[0], "ctx":r[1], "igid":r[2], "created_at":r[3], "mark":r[4],
-             "files": [ f.id for f in session.query(ftab).filter(ftab.reference == r[5]).all() ] } for r in res ]
-    
-    session.close()
-
-    return jsonify(res), 200
+        return jsonify(res), 200
 
 # 獲取指定文章
 @article.route("/get/<int:id>", methods = ["GET"])
 def getarticle(id:int):
     db = current_app.shared_resource.engine
     Session = sessionmaker(bind=db)
-    session = Session()
+    with Session() as session:
+        # get ctx
+        table = pgclass.SQLarticle
+        ftab  = pgclass.SQLfile
+        res = session.query(table.id, table.ctx, table.igid, table.created_at, table.mark, table.reference, table.hash).filter(table.id == id).filter(table.mark == 'visible').all()
 
-    # get ctx
-    table = pgclass.SQLarticle
-    ftab  = pgclass.SQLfile
-    res = session.query(table.id, table.ctx, table.igid, table.created_at, table.mark, table.reference, table.hash).filter(table.id == id).filter(table.mark == 'visible').all()
+        # mapping
+        resfn = [
+            {"id":r[0], "ctx":r[1], "igid":r[2], "created_at":r[3], "mark":r[4], "reference":r[5], # basic
+             "comment": [ c[0] for c in session.query(table.id).filter(table.reference == int(r[0]), table.mark == "visible").all() ], # comment
+             "files": [ f[0] for f in session.query(ftab.id).filter(ftab.reference == r[6]).all() ]
+             } 
+             for r in res
+        ]
 
-    # mapping
-    resfn = []
-    for r in res:
-        rd = {"id":r[0], "ctx":r[1], "igid":r[2], "created_at":r[3], "mark":r[4], "reference":r[5]}
-        # comment
-        comments = session.query(table.id).filter(table.reference == int(r[0]), table.mark == "visible").all()
-        rd["comment"] = [ c[0] for c in comments ]
-        # files
-        files = session.query(ftab).filter(ftab.reference == r[6]).all()
-        rd["files"] = [ f.id for f in files ]
-        resfn.append(rd)
-
-    session.close()
-
-    return jsonify(resfn), 200
+        return jsonify(resfn), 200
 
 # 上傳文章 / 留言
 @article.route("/post", methods = ["POST"])
@@ -80,7 +74,6 @@ def posting():
     # db
     db = current_app.shared_resource.engine
     Session = sessionmaker(bind=db)
-    session = Session()
     table = pgclass.SQLarticle
     # loadset
     opt = setting_loader.loadset()
@@ -88,7 +81,8 @@ def posting():
     maxword = opt["Niming_Max_Word"]
     # data parse
     recv = niming_pb2.DataMessage()
-    recv.ParseFromString(request.data)
+    try: recv.ParseFromString(request.data)
+    except DecodeError: return "Protobuf decode error", 400
 
     # content
     ctx = str(recv.ctx) # request.json["ctx"]
@@ -99,67 +93,64 @@ def posting():
     seed = ctx + str(time.time())
     hash = hashlib.sha256(seed.encode()).hexdigest()
 
-    # reference
-    ref = int(recv.ref) # request.json["ref"]
-    if not (ref == 0):   # 如果ref不是0
-        # 檢查是不是指向存在的文章
-        chk = session.query(table).filter(table.id == ref, table.mark == "visible").first()
-        if chk is None: return "Invalid Reference", 400
-        # 檢查指向的文章是否也是留言
-        if not(chk.reference is None): return "Invalid Reference", 400
-    else:
-        ref = None
+    with Session() as session:
+        # reference
+        ref = int(recv.ref) # request.json["ref"]
+        if not (ref == 0):   # 如果ref不是0
+            # 檢查是不是指向存在的文章
+            chk = session.query(table).filter(table.id == ref, table.mark == "visible").first()
+            if chk is None: return "Invalid Reference", 400
+            # 檢查指向的文章是否也是留言
+            if not(chk.reference is None): return "Invalid Reference", 400
+        else:
+            ref = None
     
-    # file processing
-    files = recv.files
-    # check - size
-    atts = opt["Attachment_Count"]
-    sizelimit = opt["Attachment_Size"]
-    if len(files) > atts: return "Too many files", 400
-    for f in files:
-        if len(f) <= 0 or len(f) > sizelimit: return "File size error", 400
-    # check - mimetype
-    allowed_mime = opt["Allowed_MIME"]
-    for f in files:
-        mime = magic.Magic(mime=True)
-        type = mime.from_buffer(f)
-        if not(type in allowed_mime): return "File format error", 400
-    # run processor
-    ftab = pgclass.SQLfile
-    for f in files:
-        mime = magic.Magic(mime=True)
-        type = mime.from_buffer(f)
-        fsql = ftab(reference = hash, binary = f, type = type)
-        session.add(fsql)
+        # file processing
+        files = recv.files
+        # check - size
+        atts = opt["Attachment_Count"]
+        sizelimit = opt["Attachment_Size"]
+        if len(files) > atts: return "Too many files", 400
+        for f in files:
+            if len(f) <= 0 or len(f) > sizelimit: return "File size error", 400
+        # check - mimetype
+        allowed_mime = opt["Allowed_MIME"]
+        for f in files:
+            mime = magic.Magic(mime=True)
+            type = mime.from_buffer(f)
+            if not(type in allowed_mime): return "File format error", 400
+        # run processor
+        ftab = pgclass.SQLfile
+        for f in files:
+            mime = magic.Magic(mime=True)
+            type = mime.from_buffer(f)
+            fsql = ftab(reference = hash, binary = f, type = type)
+            session.add(fsql)
 
-    # IP
-    ip = request.remote_addr
+        # IP
+        ip = request.remote_addr
 
-    # ig posting
-    if chk_before_post:
+        # ig posting
+        if chk_before_post:
+            igid = None
+        # Go posting
         igid = None
-    # Go posting
-    igid = None
-    # Coming Soon...
+        # Coming Soon...
 
-    # mark
-    if chk_before_post: mark = "pending"
-    else: mark = "visible"
+        # mark
+        if chk_before_post: mark = "pending"
+        else: mark = "visible"
 
-    # posting
-    data = table(hash = hash, ctx = ctx, igid = igid, mark = mark, reference = ref, ip = ip)
-    session.add(data)
-
-    # commit
-    session.commit()
-
-    # pg getdata
-    res = session.query(table.id, table.ctx, table.igid, table.created_at, table.mark, table.hash, table.reference).filter(table.hash == hash).all()
-    fres = session.query(ftab).filter(ftab.reference == hash).all()
-    res = [ {"id":r[0], "ctx":r[1], "igid":r[2], "created_at":r[3], "mark":r[4], "hash":r[5], "reference":r[6],
-             "files": [f.id for f in fres]
-             } for r in res ]
-    session.close()
+        # posting
+        data = table(hash = hash, ctx = ctx, igid = igid, mark = mark, reference = ref, ip = ip)
+        session.add(data)
+        session.commit()
+        # pg getdata
+        res = session.query(table.id, table.ctx, table.igid, table.created_at, table.mark, table.hash, table.reference).filter(table.hash == hash).all()
+        fres = session.query(ftab.id).filter(ftab.reference == hash).all()
+        res = [ {"id":r[0], "ctx":r[1], "igid":r[2], "created_at":r[3], "mark":r[4], "hash":r[5], "reference":r[6],
+                 "files": [f[0] for f in fres]
+                 } for r in res ]
 
     # logger
     logger.logger(db, "newpost", "New post (id=%d point to %s): %s"%(res[0]["id"], ref, mark))
@@ -172,44 +163,40 @@ def posting():
 def owner_getarticle(sha256:str):
     db = current_app.shared_resource.engine
     Session = sessionmaker(bind=db)
-    session = Session()
     table = pgclass.SQLarticle
     ftab = pgclass.SQLfile
 
     # 獲取指定文章
     if request.method == "GET":
-        res = session.query(table.id, table.ctx, table.igid, table.created_at, table.mark, table.hash, table.reference).filter(table.hash == sha256).all()
-        resfn = []
-        for r in res:
-            rd = {"id":r[0], "ctx":r[1], "igid":r[2], "created_at":r[3], "mark":r[4], "hash":r[5], "reference":r[6]}
-            # comments
-            comments = session.query(table.id).filter(table.reference == int(r[0])).all()
-            rd["comment"] = [ c[0] for c in comments ]
-            # files
-            files = session.query(ftab).filter(ftab.reference == r[5]).all()
-            rd["files"] = [ f.id for f in files ]
-            resfn.append(rd)
+        with Session() as session:
+            res = session.query(table.id, table.ctx, table.igid, table.created_at, table.mark, table.hash, table.reference).filter(table.hash == sha256).all()
+            resfn = [
+                {"id":r[0], "ctx":r[1], "igid":r[2], "created_at":r[3], "mark":r[4], "hash":r[5], "reference":r[6],
+                "comment":[ c[0] for c in session.query(table.id).filter(table.reference == int(r[0])).all() ], # comments
+                "files":[ f[0] for f in session.query(ftab.id).filter(ftab.reference == r[5]).all() ]} # files
+                for r in res
+            ]
         return jsonify(resfn), 200
     # 刪除指定文章跟他們的留言、檔案
     elif request.method == "DELETE":
-        rcl = []
-        res = session.query(table).filter(table.hash == sha256).first()     # 本體
-        resc = session.query(table).filter(table.reference == res.id).all() # 留言
-        # 刪除本體檔案
-        resf = session.query(ftab).filter(ftab.reference == res.hash).all()
-        for f in resf: session.delete(f)
-        # 刪留言
-        for c in resc:
-            rcl.append(c.id)
-            # 刪留言的檔案
-            resf = session.query(ftab).filter(ftab.reference == c.hash).all()
-            for f in resf: session.delete(f)
+        with Session() as session:
+            rcl = []
+            res = session.query(table).filter(table.hash == sha256).first()     # 本體
+            if res is None: return "Post not found", 400 # 檢查本體是否存在
+            # 刪除本體檔案
+            session.query(ftab).filter(ftab.reference == res.hash).delete()
             # 刪留言
-            session.delete(c)
-        # 刪本體
-        session.delete(res)
-        # commit
-        session.commit()
+            resc = session.query(table).filter(table.reference == res.id).all() # 留言
+            for c in resc:
+                rcl.append(c.id)
+                # 刪留言的檔案
+                session.query(ftab).filter(ftab.reference == c.hash).delete()
+                # 刪留言
+                session.delete(c)
+            # 刪本體
+            session.delete(res)
+            # commit
+            session.commit()
         # logger
         logger.logger(db, "delpost", "Delete post (id=%d with comments %s): last_status=%s"%(res.id, str(rcl), res.mark))
         return "OK", 200
@@ -217,22 +204,19 @@ def owner_getarticle(sha256:str):
     session.close()
 
 # 獲取匿名文附檔
-@article.route("/file/<int:id>")
+@article.route("/file/<int:id>", methods=["GET"])
 def getfile(id:int):
     db = current_app.shared_resource.engine
     Session = sessionmaker(bind=db)
-    session = Session()
 
     table = pgclass.SQLarticle
     ftab  = pgclass.SQLfile
-    fres = session.query(ftab).filter(ftab.id == id).first()
-    if fres is None: return "File not found", 400       # 檢查是否存在
-    article = session.query(table).filter(table.hash == fres.reference, table.mark == 'visible').first()
-    if article is None: return "File not found", 400    # 檢查文章本體是否存在/可以閱覽
-
-    session.close()
-
+    with Session() as session:
+        fres = session.query(ftab).filter(ftab.id == id).first()
+        if fres is None: return "File not found", 400       # 檢查檔案是否存在
+        article = session.query(table).filter(table.hash == fres.reference, table.mark == 'visible').first()
+        if article is None: return "File not found", 400    # 檢查文章本體是否存在/可以閱覽
     resp = make_response(fres.binary)
     resp.headers.set("Content-Type", fres.type)
-    
+    resp.headers.set("Content-Disposition", f"attachment; filename=file{fres.id}")
     return resp
\ No newline at end of file
diff --git a/blueprints/log.py b/blueprints/log.py
index ccce3b4..27f80f9 100644
--- a/blueprints/log.py
+++ b/blueprints/log.py
@@ -9,21 +9,21 @@ log = Blueprint('log', __name__)
 @log.route("/list", methods = ["GET"])
 def listlog():
     # variables
+    if request.args.get("start") is None or request.args.get("count") is None or \
+        request.args.get("start").isdigit()==False or request.args.get("count").isdigit()==False: return "Arguments error", 400
     rst = int(request.args.get("start"))
     count = int(request.args.get("count"))
 
     # db
     db = current_app.shared_resource.engine
     Session = sessionmaker(bind=db)
-    session = Session()
-
     # get ctx
-    table = pgclass.SQLlog
-    res = session.query(table).order_by(desc(table.id)).offset(rst).limit(count).all()
-    session.close()
+    with Session() as session:
+        table = pgclass.SQLlog
+        res = session.query(table).order_by(desc(table.id)).offset(rst).limit(count).all()
 
-    # mapping
-    res = [ {"id":r.id, "created_at":r.created_at, "source":r.source, "message":r.message} for r in res ]
+        # mapping
+        res = [ {"id":r.id, "created_at":r.created_at, "source":r.source, "message":r.message} for r in res ]
 
     return jsonify(res)
 
@@ -33,12 +33,10 @@ def getlog(id:int):
     # db
     db = current_app.shared_resource.engine
     Session = sessionmaker(bind=db)
-    session = Session()
-
     # get ctx
-    table = pgclass.SQLlog
-    res = session.query(table).filter(table.id == id).all()
-    session.close()
+    with Session() as session:
+        table = pgclass.SQLlog
+        res = session.query(table).filter(table.id == id).all()
 
     # mapping
     res = [ {"id":r.id, "created_at":r.created_at, "source":r.source, "message":r.message} for r in res ]
diff --git a/requirements.txt b/requirements.txt
index 2e05a63..12f8e02 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,4 +3,5 @@ flask
 pyjwt
 psycopg2
 protobuf==5.28.3
-python-magic
\ No newline at end of file
+python-magic
+bcrypt
\ No newline at end of file
diff --git a/utils/ighelper.py b/utils/ighelper.py
new file mode 100644
index 0000000..b2725f2
--- /dev/null
+++ b/utils/ighelper.py
@@ -0,0 +1,2 @@
+def ighelper():
+    pass
\ No newline at end of file
diff --git a/utils/logger.py b/utils/logger.py
index e0918ac..2beebe3 100644
--- a/utils/logger.py
+++ b/utils/logger.py
@@ -11,6 +11,12 @@ def logger(engine, type, message):
     if type == "newpost" or type == "delpost":
         flag = True
         log = table(source = "general", message = message)
+    elif type in ["login", "user.create", "user.delete", "article.delete", "article.pend"]:
+        flag = True
+        log = table(source = "admin", message = message)
+    elif type in ["server.start"]:
+        flag = True
+        log = table(source = "server", message = message)
     
     # session.add
     if flag: