diff --git a/Base/Database.cpp b/Base/Database.cpp
index 16812d3..c0dc89d 100644
--- a/Base/Database.cpp
+++ b/Base/Database.cpp
@@ -4,6 +4,13 @@
 #include <stdexcept>
 
 namespace Older {
+
+Database::~Database() {
+    if (m_sqlite != nullptr) {
+        sqlite3_close(m_sqlite);
+    }
+}
+
 bool Database::open(const std::string &path) {
     if (sqlite3_open(path.c_str(), &m_sqlite) != SQLITE_OK) {
         LOG(error) << "Can't open database: " << sqlite3_errmsg(m_sqlite);
diff --git a/Base/Database.h b/Base/Database.h
index cee6e29..68127e6 100644
--- a/Base/Database.h
+++ b/Base/Database.h
@@ -10,6 +10,7 @@ typedef struct sqlite3 sqlite3;
 namespace Older {
 class Database {
 public:
+    ~Database();
     bool open(const std::string &path);
     void upsertVisitRecord(const std::string &url, const std::string &visitorUuid, const std::string &userAgent,
                            int64_t viewTime);
diff --git a/Readme.md b/Readme.md
index 40fae36..74d7219 100644
--- a/Readme.md
+++ b/Readme.md
@@ -162,7 +162,25 @@ curl -v -X POST \
 | salt          | BLOB     | NOT NULL                            |     |
 | created_at    | INTEGER  | NOT NULL                            |     |
 
+## WebRTC Signal 服务
 
+```javascript
+// /api/v1/webrtc/signal/{id}
+{
+    "id": "server",
+    "type": "request"
+}
+{
+    "id": "DDeFJqNHPN",
+    "type": "offer",
+    "sdp": "v=0\r\no=rtc 2294191555 0 IN IP4 127.0.0.1\r\ns=-\r\nt=0 0\r\n ......"
+}
+{
+    "id": "server",
+    "type": "answer",
+    "sdp": "v=0\r\no=- 7471496884559213660 2 IN IP4 127.0.0.1\r\ns=-\r\nt=0 0\r\n ......"
+}
+```
 
 ## Live2D 模型添加
 
diff --git a/Tools/UrlCheck.cpp b/Tools/UrlCheck.cpp
index 17877f0..d064b65 100644
--- a/Tools/UrlCheck.cpp
+++ b/Tools/UrlCheck.cpp
@@ -17,6 +17,9 @@
 #include <iostream>
 
 bool isUrlValid(boost::asio::io_context &ioContext, const std::string &host, const std::string &port, const std::string &target);
+bool isPathValid(const std::string &docRoot, const std::string &target);
+
+// ./UrlCheck -d ./database.sqlite -r ./amass_blog  --delete-invalid=true --delete="/" --delete="/login" --delete="/MessageBoard" --delete="/我的博客"
 
 int main(int argc, char const *argv[]) {
     boost::program_options::options_description description("Allowed options");
@@ -24,6 +27,8 @@ int main(int argc, char const *argv[]) {
     description.add_options()
             ("help,h", "produce help message.")
             ("database,d", boost::program_options::value<std::string>(),"set database path")
+            ("docroot,r", boost::program_options::value<std::string>(),"set docroot path")
+            ("delete", boost::program_options::value<std::vector <std::string>>(),"set docroot path")
             ("delete-invalid", boost::program_options::value<bool>()->default_value(false),"delete invalid url");
     // clang-format on
     boost::program_options::variables_map values;
@@ -31,13 +36,23 @@ int main(int argc, char const *argv[]) {
     boost::program_options::notify(values);
 
     std::string path;
+    std::string docRoot;
+    std::vector<std::string> removeItems;
 
     if (values.count("help")) {
         std::cout << description << std::endl;
         std::exit(0);
-    } else if (values.count("database")) {
+    }
+    if (values.count("database")) {
         path = values.at("database").as<std::string>();
     }
+    if (values.count("docroot")) {
+        docRoot = values.at("docroot").as<std::string>();
+    }
+
+    if (values.count("delete")) {
+        removeItems = values.at("delete").as<std::vector<std::string>>();
+    }
 
     if (path.empty()) {
         std::cerr << "please specify the database path." << std::endl;
@@ -48,6 +63,22 @@ int main(int argc, char const *argv[]) {
         return 2;
     }
 
+    if (docRoot.empty()) {
+        std::cerr << "please specify the doc root." << std::endl;
+        std::cout << description << std::endl;
+        return 1;
+    } else if (!std::filesystem::exists(docRoot)) {
+        std::cerr << "doc root " << docRoot << " not existed." << std::endl;
+        return 2;
+    }
+
+    if (!removeItems.empty()) {
+        std::cout << "remove:\r " << std::endl;
+        for (auto &item : removeItems) {
+            std::cout << item << std::endl;
+        }
+    }
+
     Older::Database database;
     if (!database.open(path)) {
         return 3;
@@ -56,10 +87,14 @@ int main(int argc, char const *argv[]) {
     boost::asio::io_context ioContext;
     auto items = database.visitRecords();
     for (auto &item : items) {
-        bool valid = isUrlValid(ioContext, "amass.fun", "443", item.url);
+        bool needDelete = std::find(removeItems.cbegin(), removeItems.cend(), item.url) != removeItems.cend();
+        if (!needDelete) {
+            needDelete = !isPathValid(docRoot, item.url) && values.at("delete-invalid").as<bool>();
+        }
+        // bool valid = isUrlValid(ioContext, "amass.fun", "443", item.url);
         std::cout << item.url << std::endl;
-        std::cout << "valid: " << valid << std::endl;
-        if (!valid && values.at("delete-invalid").as<bool>()) {
+
+        if (needDelete) {
             std::cout << "delete: " << database.removeVisitRecord(item.id) << std::endl;
         }
         std::cout << "----------" << std::endl;
@@ -68,6 +103,10 @@ int main(int argc, char const *argv[]) {
     return 0;
 }
 
+bool isPathValid(const std::string &docRoot, const std::string &target) {
+    return std::filesystem::exists(docRoot + target);
+}
+
 bool isUrlValid(boost::asio::io_context &ioContext, const std::string &host, const std::string &port, const std::string &target) {
     using namespace boost;
     using namespace boost::asio;
diff --git a/resources/conf/server.conf b/resources/conf/server.conf
index 9305581..3fe78fb 100644
--- a/resources/conf/server.conf
+++ b/resources/conf/server.conf
@@ -50,6 +50,40 @@ location ^~ /api/v1/freedom {
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 }
 
+location /api/v2/freedom {
+    client_max_body_size 0;
+    grpc_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    client_body_timeout 5m;
+    grpc_read_timeout 315;
+    grpc_send_timeout 5m;
+    grpc_pass unix:/dev/shm/Freedom-Vless.socket;
+}
+
+location /api/v3/freedom {
+    if ($http_upgrade != "websocket") {
+		return 404;
+	}
+    proxy_pass http://[::1]:1234;
+	proxy_redirect off;
+    proxy_http_version 1.1;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection "upgrade";
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_read_timeout 5d;
+}
+
+location /api/v4/freedom { 
+    if ($request_method != "POST") {
+        return 404;
+        }
+    client_body_buffer_size 1m;
+    client_body_timeout 1h;
+    client_max_body_size 0;
+    grpc_pass grpc://[::1]:3002;
+}
+
 location ^~ /freedom {
     if ($content_type !~ "^application/grpc") {
         return 402;
diff --git a/resources/older.service b/resources/older.service
index 954c291..c3a521a 100644
--- a/resources/older.service
+++ b/resources/older.service
@@ -9,7 +9,6 @@ WorkingDirectory=/root/Server
 Restart=on-failure
 RestartSec=5s
 User=root
-Environment="LD_LIBRARY_PATH=/opt/Libraries/boost_1_87_0/lib:$LD_LIBRARY_PATH"
 
 [Install]
 WantedBy=multi-user.target