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https://github.com/RGBCube/serenity
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FileSystemAccessServer: Manage concurrent file requests
Before this patch, when you called FileSystemAccessServer::Client::try_* twice, the second call used the same variable to store the promise. This "race condition" is now solved using a HashMap, to store multiple parallel requests.
This commit is contained in:
Lucas CHOLLET
Linus Groh
parent
e432a284d7
commit
9521952f36
6 changed files with 88 additions and 61 deletions
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@ -28,8 +28,8 @@ Client& Client::the()
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Result Client::try_request_file_read_only_approved(GUI::Window* parent_window, String const& path)
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{
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m_promise = Core::Promise<Result>::construct();
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m_parent_window = parent_window;
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auto const id = get_new_id();
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m_promises.set(id, PromiseAndWindow { Core::Promise<Result>::construct(), parent_window });
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auto parent_window_server_client_id = GUI::ConnectionToWindowServer::the().expose_client_id();
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auto child_window_server_client_id = expose_window_server_client_id();
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@ -42,19 +42,19 @@ Result Client::try_request_file_read_only_approved(GUI::Window* parent_window, S
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});
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if (path.starts_with('/')) {
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async_request_file_read_only_approved(parent_window_server_client_id, parent_window_id, path);
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async_request_file_read_only_approved(id, parent_window_server_client_id, parent_window_id, path);
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} else {
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auto full_path = LexicalPath::join(Core::File::current_working_directory(), path).string();
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async_request_file_read_only_approved(parent_window_server_client_id, parent_window_id, full_path);
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async_request_file_read_only_approved(id, parent_window_server_client_id, parent_window_id, full_path);
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}
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return m_promise->await();
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return handle_promise(id);
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}
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Result Client::try_request_file(GUI::Window* parent_window, String const& path, Core::OpenMode mode)
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{
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m_promise = Core::Promise<Result>::construct();
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m_parent_window = parent_window;
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auto const id = get_new_id();
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m_promises.set(id, PromiseAndWindow { Core::Promise<Result>::construct(), parent_window });
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auto parent_window_server_client_id = GUI::ConnectionToWindowServer::the().expose_client_id();
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auto child_window_server_client_id = expose_window_server_client_id();
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@ -67,19 +67,19 @@ Result Client::try_request_file(GUI::Window* parent_window, String const& path,
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});
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if (path.starts_with('/')) {
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async_request_file(parent_window_server_client_id, parent_window_id, path, mode);
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async_request_file(id, parent_window_server_client_id, parent_window_id, path, mode);
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} else {
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auto full_path = LexicalPath::join(Core::File::current_working_directory(), path).string();
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async_request_file(parent_window_server_client_id, parent_window_id, full_path, mode);
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async_request_file(id, parent_window_server_client_id, parent_window_id, full_path, mode);
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}
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return m_promise->await();
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return handle_promise(id);
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}
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Result Client::try_open_file(GUI::Window* parent_window, String const& window_title, StringView path, Core::OpenMode requested_access)
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{
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m_promise = Core::Promise<Result>::construct();
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m_parent_window = parent_window;
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auto const id = get_new_id();
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m_promises.set(id, PromiseAndWindow { Core::Promise<Result>::construct(), parent_window });
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auto parent_window_server_client_id = GUI::ConnectionToWindowServer::the().expose_client_id();
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auto child_window_server_client_id = expose_window_server_client_id();
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@ -91,15 +91,15 @@ Result Client::try_open_file(GUI::Window* parent_window, String const& window_ti
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GUI::ConnectionToWindowServer::the().async_remove_window_stealing_for_client(child_window_server_client_id, parent_window_id);
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});
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async_prompt_open_file(parent_window_server_client_id, parent_window_id, window_title, path, requested_access);
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async_prompt_open_file(id, parent_window_server_client_id, parent_window_id, window_title, path, requested_access);
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return m_promise->await();
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return handle_promise(id);
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}
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Result Client::try_save_file(GUI::Window* parent_window, String const& name, String const ext, Core::OpenMode requested_access)
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{
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m_promise = Core::Promise<Result>::construct();
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m_parent_window = parent_window;
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auto const id = get_new_id();
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m_promises.set(id, PromiseAndWindow { Core::Promise<Result>::construct(), parent_window });
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auto parent_window_server_client_id = GUI::ConnectionToWindowServer::the().expose_client_id();
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auto child_window_server_client_id = expose_window_server_client_id();
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@ -111,51 +111,69 @@ Result Client::try_save_file(GUI::Window* parent_window, String const& name, Str
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GUI::ConnectionToWindowServer::the().async_remove_window_stealing_for_client(child_window_server_client_id, parent_window_id);
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});
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async_prompt_save_file(parent_window_server_client_id, parent_window_id, name.is_null() ? "Untitled" : name, ext.is_null() ? "txt" : ext, Core::StandardPaths::home_directory(), requested_access);
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async_prompt_save_file(id, parent_window_server_client_id, parent_window_id, name.is_null() ? "Untitled" : name, ext.is_null() ? "txt" : ext, Core::StandardPaths::home_directory(), requested_access);
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return m_promise->await();
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return handle_promise(id);
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}
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void Client::handle_prompt_end(i32 error, Optional<IPC::File> const& ipc_file, Optional<String> const& chosen_file)
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void Client::handle_prompt_end(i32 request_id, i32 error, Optional<IPC::File> const& ipc_file, Optional<String> const& chosen_file)
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{
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VERIFY(m_promise);
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auto potential_data = m_promises.get(request_id);
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VERIFY(potential_data.has_value());
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auto& request_data = potential_data.value();
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if (error != 0) {
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// We don't want to show an error message for non-existent files since some applications may want
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// to handle it as opening a new, named file.
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if (error != -1 && error != ENOENT)
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GUI::MessageBox::show_error(m_parent_window, String::formatted("Opening \"{}\" failed: {}", *chosen_file, strerror(error)));
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m_promise->resolve(Error::from_errno(error));
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GUI::MessageBox::show_error(request_data.parent_window, String::formatted("Opening \"{}\" failed: {}", *chosen_file, strerror(error)));
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request_data.promise->resolve(Error::from_errno(error));
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return;
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}
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auto file = Core::File::construct();
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auto fd = ipc_file->take_fd();
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if (!file->open(fd, Core::OpenMode::ReadWrite, Core::File::ShouldCloseFileDescriptor::Yes) && file->error() != ENOENT) {
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GUI::MessageBox::show_error(m_parent_window, String::formatted("Opening \"{}\" failed: {}", *chosen_file, strerror(error)));
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m_promise->resolve(Error::from_errno(file->error()));
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GUI::MessageBox::show_error(request_data.parent_window, String::formatted("Opening \"{}\" failed: {}", *chosen_file, strerror(error)));
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request_data.promise->resolve(Error::from_errno(file->error()));
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return;
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}
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if (file->is_device()) {
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GUI::MessageBox::show_error(m_parent_window, String::formatted("Opening \"{}\" failed: Cannot open device files", *chosen_file));
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m_promise->resolve(Error::from_string_literal("Cannot open device files"sv));
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GUI::MessageBox::show_error(request_data.parent_window, String::formatted("Opening \"{}\" failed: Cannot open device files", *chosen_file));
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request_data.promise->resolve(Error::from_string_literal("Cannot open device files"sv));
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return;
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}
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if (file->is_directory()) {
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GUI::MessageBox::show_error(m_parent_window, String::formatted("Opening \"{}\" failed: Cannot open directory", *chosen_file));
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m_promise->resolve(Error::from_string_literal("Cannot open directory"sv));
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GUI::MessageBox::show_error(request_data.parent_window, String::formatted("Opening \"{}\" failed: Cannot open directory", *chosen_file));
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request_data.promise->resolve(Error::from_string_literal("Cannot open directory"sv));
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return;
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}
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file->set_filename(move(*chosen_file));
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m_promise->resolve(file);
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request_data.promise->resolve(file);
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}
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void Client::die()
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{
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if (m_promise)
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handle_prompt_end(ECONNRESET, {}, "");
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for (auto const& entry : m_promises)
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handle_prompt_end(entry.key, ECONNRESET, {}, "");
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}
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int Client::get_new_id()
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{
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auto const new_id = m_last_id++;
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// Note: This verify shouldn't fail, and we should provide a valid ID
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// But we probably have more issues if this test fails.
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VERIFY(!m_promises.contains(new_id));
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return new_id;
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}
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Result Client::handle_promise(int id)
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{
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auto result = m_promises.get(id)->promise->await();
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m_promises.remove(id);
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return result;
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}
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}
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@ -7,6 +7,7 @@
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#pragma once
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#include <AK/HashMap.h>
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#include <FileSystemAccessServer/FileSystemAccessClientEndpoint.h>
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#include <FileSystemAccessServer/FileSystemAccessServerEndpoint.h>
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#include <LibCore/File.h>
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@ -41,10 +42,18 @@ private:
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{
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}
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virtual void handle_prompt_end(i32 error, Optional<IPC::File> const& fd, Optional<String> const& chosen_file) override;
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virtual void handle_prompt_end(i32 request_id, i32 error, Optional<IPC::File> const& fd, Optional<String> const& chosen_file) override;
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RefPtr<Core::Promise<Result>> m_promise;
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GUI::Window* m_parent_window { nullptr };
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int get_new_id();
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Result handle_promise(int);
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struct PromiseAndWindow {
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RefPtr<Core::Promise<Result>> promise {};
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GUI::Window* parent_window { nullptr };
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};
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HashMap<int, PromiseAndWindow> m_promises {};
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int m_last_id { 0 };
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};
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}
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@ -45,7 +45,7 @@ RefPtr<GUI::Window> ConnectionFromClient::create_dummy_child_window(i32 window_s
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return window;
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}
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void ConnectionFromClient::request_file_handler(i32 window_server_client_id, i32 parent_window_id, String const& path, Core::OpenMode const& requested_access, ShouldPrompt prompt)
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void ConnectionFromClient::request_file_handler(i32 request_id, i32 window_server_client_id, i32 parent_window_id, String const& path, Core::OpenMode const& requested_access, ShouldPrompt prompt)
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{
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VERIFY(path.starts_with("/"sv));
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@ -97,26 +97,26 @@ void ConnectionFromClient::request_file_handler(i32 window_server_client_id, i32
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if (file.is_error()) {
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dbgln("FileSystemAccessServer: Couldn't open {}, error {}", path, file.error());
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async_handle_prompt_end(errno, Optional<IPC::File> {}, path);
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async_handle_prompt_end(request_id, errno, Optional<IPC::File> {}, path);
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} else {
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async_handle_prompt_end(0, IPC::File(file.value()->leak_fd(), IPC::File::CloseAfterSending), path);
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async_handle_prompt_end(request_id, 0, IPC::File(file.value()->leak_fd(), IPC::File::CloseAfterSending), path);
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}
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} else {
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async_handle_prompt_end(-1, Optional<IPC::File> {}, path);
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async_handle_prompt_end(request_id, -1, Optional<IPC::File> {}, path);
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}
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}
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void ConnectionFromClient::request_file_read_only_approved(i32 window_server_client_id, i32 parent_window_id, String const& path)
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void ConnectionFromClient::request_file_read_only_approved(i32 request_id, i32 window_server_client_id, i32 parent_window_id, String const& path)
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{
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request_file_handler(window_server_client_id, parent_window_id, path, Core::OpenMode::ReadOnly, ShouldPrompt::No);
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request_file_handler(request_id, window_server_client_id, parent_window_id, path, Core::OpenMode::ReadOnly, ShouldPrompt::No);
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}
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void ConnectionFromClient::request_file(i32 window_server_client_id, i32 parent_window_id, String const& path, Core::OpenMode const& requested_access)
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void ConnectionFromClient::request_file(i32 request_id, i32 window_server_client_id, i32 parent_window_id, String const& path, Core::OpenMode const& requested_access)
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{
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request_file_handler(window_server_client_id, parent_window_id, path, requested_access, ShouldPrompt::Yes);
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request_file_handler(request_id, window_server_client_id, parent_window_id, path, requested_access, ShouldPrompt::Yes);
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}
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void ConnectionFromClient::prompt_open_file(i32 window_server_client_id, i32 parent_window_id, String const& window_title, String const& path_to_view, Core::OpenMode const& requested_access)
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void ConnectionFromClient::prompt_open_file(i32 request_id, i32 window_server_client_id, i32 parent_window_id, String const& window_title, String const& path_to_view, Core::OpenMode const& requested_access)
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{
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auto relevant_permissions = requested_access & (Core::OpenMode::ReadOnly | Core::OpenMode::WriteOnly);
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VERIFY(relevant_permissions != Core::OpenMode::NotOpen);
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@ -125,10 +125,10 @@ void ConnectionFromClient::prompt_open_file(i32 window_server_client_id, i32 par
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auto user_picked_file = GUI::FilePicker::get_open_filepath(main_window, window_title, path_to_view);
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prompt_helper(user_picked_file, requested_access);
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prompt_helper(request_id, user_picked_file, requested_access);
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}
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void ConnectionFromClient::prompt_save_file(i32 window_server_client_id, i32 parent_window_id, String const& name, String const& ext, String const& path_to_view, Core::OpenMode const& requested_access)
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void ConnectionFromClient::prompt_save_file(i32 request_id, i32 window_server_client_id, i32 parent_window_id, String const& name, String const& ext, String const& path_to_view, Core::OpenMode const& requested_access)
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{
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auto relevant_permissions = requested_access & (Core::OpenMode::ReadOnly | Core::OpenMode::WriteOnly);
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VERIFY(relevant_permissions != Core::OpenMode::NotOpen);
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@ -137,10 +137,10 @@ void ConnectionFromClient::prompt_save_file(i32 window_server_client_id, i32 par
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auto user_picked_file = GUI::FilePicker::get_save_filepath(main_window, name, ext, path_to_view);
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prompt_helper(user_picked_file, requested_access);
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prompt_helper(request_id, user_picked_file, requested_access);
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}
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void ConnectionFromClient::prompt_helper(Optional<String> const& user_picked_file, Core::OpenMode const& requested_access)
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void ConnectionFromClient::prompt_helper(i32 request_id, Optional<String> const& user_picked_file, Core::OpenMode const& requested_access)
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{
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if (user_picked_file.has_value()) {
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VERIFY(user_picked_file->starts_with("/"sv));
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@ -149,7 +149,7 @@ void ConnectionFromClient::prompt_helper(Optional<String> const& user_picked_fil
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if (file.is_error()) {
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dbgln("FileSystemAccessServer: Couldn't open {}, error {}", user_picked_file.value(), file.error());
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async_handle_prompt_end(errno, Optional<IPC::File> {}, user_picked_file);
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async_handle_prompt_end(request_id, errno, Optional<IPC::File> {}, user_picked_file);
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} else {
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auto maybe_permissions = m_approved_files.get(user_picked_file.value());
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auto new_permissions = requested_access & (Core::OpenMode::ReadOnly | Core::OpenMode::WriteOnly);
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@ -158,10 +158,10 @@ void ConnectionFromClient::prompt_helper(Optional<String> const& user_picked_fil
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m_approved_files.set(user_picked_file.value(), new_permissions);
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async_handle_prompt_end(0, IPC::File(file.value()->leak_fd(), IPC::File::CloseAfterSending), user_picked_file);
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async_handle_prompt_end(request_id, 0, IPC::File(file.value()->leak_fd(), IPC::File::CloseAfterSending), user_picked_file);
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}
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} else {
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async_handle_prompt_end(-1, Optional<IPC::File> {}, Optional<String> {});
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async_handle_prompt_end(request_id, -1, Optional<IPC::File> {}, Optional<String> {});
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}
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}
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@ -27,19 +27,19 @@ public:
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private:
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explicit ConnectionFromClient(NonnullOwnPtr<Core::Stream::LocalSocket>);
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virtual void request_file_read_only_approved(i32, i32, String const&) override;
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virtual void request_file(i32, i32, String const&, Core::OpenMode const&) override;
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virtual void prompt_open_file(i32, i32, String const&, String const&, Core::OpenMode const&) override;
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virtual void prompt_save_file(i32, i32, String const&, String const&, String const&, Core::OpenMode const&) override;
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virtual void request_file_read_only_approved(i32, i32, i32, String const&) override;
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virtual void request_file(i32, i32, i32, String const&, Core::OpenMode const&) override;
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virtual void prompt_open_file(i32, i32, i32, String const&, String const&, Core::OpenMode const&) override;
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virtual void prompt_save_file(i32, i32, i32, String const&, String const&, String const&, Core::OpenMode const&) override;
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void prompt_helper(Optional<String> const&, Core::OpenMode const&);
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void prompt_helper(i32, Optional<String> const&, Core::OpenMode const&);
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RefPtr<GUI::Window> create_dummy_child_window(i32, i32);
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enum class ShouldPrompt {
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No,
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Yes
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};
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void request_file_handler(i32, i32, String const&, Core::OpenMode const&, ShouldPrompt);
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void request_file_handler(i32, i32, i32, String const&, Core::OpenMode const&, ShouldPrompt);
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virtual Messages::FileSystemAccessServer::ExposeWindowServerClientIdResponse expose_window_server_client_id() override;
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@ -1,4 +1,4 @@
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endpoint FileSystemAccessClient
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{
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handle_prompt_end(i32 error, Optional<IPC::File> fd, Optional<String> chosen_file) =|
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handle_prompt_end(i32 request_id, i32 error, Optional<IPC::File> fd, Optional<String> chosen_file) =|
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}
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@ -3,10 +3,10 @@
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endpoint FileSystemAccessServer
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{
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request_file_read_only_approved(i32 window_server_client_id, i32 window_id, String path) =|
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request_file(i32 window_server_client_id, i32 window_id, String path, Core::OpenMode requested_access) =|
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prompt_open_file(i32 window_server_client_id, i32 window_id, String window_title, String path_to_view, Core::OpenMode requested_access) =|
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prompt_save_file(i32 window_server_client_id, i32 window_id,String title, String ext, String path_to_view, Core::OpenMode requested_access) =|
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request_file_read_only_approved(i32 request_id, i32 window_server_client_id, i32 window_id, String path) =|
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||||
request_file(i32 request_id, i32 window_server_client_id, i32 window_id, String path, Core::OpenMode requested_access) =|
|
||||
prompt_open_file(i32 request_id, i32 window_server_client_id, i32 window_id, String window_title, String path_to_view, Core::OpenMode requested_access) =|
|
||||
prompt_save_file(i32 request_id, i32 window_server_client_id, i32 window_id, String title, String ext, String path_to_view, Core::OpenMode requested_access) =|
|
||||
|
||||
expose_window_server_client_id() => (i32 client_id)
|
||||
}
|
||||
|
|
|
|||
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Reference in a new issue