New main.dart from serious_python 0.7.0
This commit is contained in:
Feodor Fitsner
parent
d236f2eded
commit
c89dc8844e
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@ -9,7 +9,6 @@
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"copyright": "Copyright (c) 2023 Your Company",
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"sep": "/",
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"kotlin_dir": "{{ cookiecutter.org_name.replace('.', cookiecutter.sep) }}{{ cookiecutter.sep }}{{ cookiecutter.project_name }}{{ cookiecutter.sep }}",
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"windows_tcp_port": 63777,
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"hide_loading_animation": true,
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"team_id": "",
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"base_url": "/",
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@ -1,14 +1,78 @@
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import 'dart:async';
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import 'dart:io';
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import 'package:flet/flet.dart';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:path/path.dart' as path;
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import 'package:serious_python/serious_python.dart';
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import 'package:url_strategy/url_strategy.dart';
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const bool isProduction = bool.fromEnvironment('dart.vm.product');
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const assetPath = "app/app.zip";
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const pythonModuleName = "{{ cookiecutter.python_module_name }}";
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final hideLoadingPage =
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bool.tryParse("{{ cookiecutter.hide_loading_animation }}".toLowerCase()) ??
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true;
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const outLogFilename = "out.log";
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const errorExitCode = 100;
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const pythonScript = """
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import certifi, os, runpy, socket, sys, traceback
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os.environ["REQUESTS_CA_BUNDLE"] = certifi.where()
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os.environ["SSL_CERT_FILE"] = certifi.where()
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if os.getenv("FLET_PLATFORM") == "android":
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import ssl
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def create_default_context(
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purpose=ssl.Purpose.SERVER_AUTH, *, cafile=None, capath=None, cadata=None
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):
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return ssl.create_default_context(
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purpose=purpose, cafile=certifi.where(), capath=capath, cadata=cadata
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)
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ssl._create_default_https_context = create_default_context
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out_file = open("$outLogFilename", "w+", buffering=1)
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callback_socket_addr = os.environ.get("FLET_PYTHON_CALLBACK_SOCKET_ADDR")
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if ":" in callback_socket_addr:
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addr, port = callback_socket_addr.split(":")
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callback_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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callback_socket.connect((addr, int(port)))
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else:
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callback_socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
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callback_socket.connect(callback_socket_addr)
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sys.stdout = sys.stderr = out_file
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def flet_exit(code=0):
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callback_socket.sendall(str(code).encode())
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out_file.close()
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callback_socket.close()
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sys.exit = flet_exit
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ex = None
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try:
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runpy.run_module("{module_name}", run_name="__main__")
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except Exception as e:
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ex = e
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traceback.print_exception(e)
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sys.exit(0 if ex is None else $errorExitCode)
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""";
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// global vars
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String pageUrl = "";
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String assetsDir = "";
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String appDir = "";
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Map<String, String> environmentVariables = {};
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void main() async {
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if (isProduction) {
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// ignore: avoid_returning_null_for_void
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@ -17,29 +81,49 @@ void main() async {
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runApp(FutureBuilder(
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future: prepareApp(),
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builder: (BuildContext context, AsyncSnapshot<List<String>> snapshot) {
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builder: (BuildContext context, AsyncSnapshot snapshot) {
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if (snapshot.hasData) {
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return FletApp(
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pageUrl: snapshot.data![0],
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assetsDir: snapshot.data![1],
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hideLoadingPage: bool.tryParse(
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"{{ cookiecutter.hide_loading_animation }}".toLowerCase()),
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// OK - start Python program
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return kIsWeb
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? FletApp(
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pageUrl: pageUrl,
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assetsDir: assetsDir,
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hideLoadingPage: hideLoadingPage,
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)
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: FutureBuilder(
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future: runPythonApp(),
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builder:
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(BuildContext context, AsyncSnapshot<String?> snapshot) {
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if (snapshot.hasData || snapshot.hasError) {
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// error or premature finish
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return MaterialApp(
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home: ErrorScreen(
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title: "Error running app",
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text: snapshot.data ?? snapshot.error.toString()),
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);
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} else {
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// no result of error
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return FletApp(
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pageUrl: pageUrl,
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assetsDir: assetsDir,
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hideLoadingPage: hideLoadingPage,
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);
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}
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});
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} else if (snapshot.hasError) {
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return Text('Error loading Flet app: ${snapshot.error}');
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// error
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return MaterialApp(
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home: ErrorScreen(
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title: "Error starting app",
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text: snapshot.error.toString()));
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} else {
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// loading
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return const SizedBox.shrink();
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return const MaterialApp(home: BlankScreen());
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}
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}));
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}
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Future<List<String>> prepareApp() async {
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await setupDesktop();
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String pageUrl = "";
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String assetsDir = "";
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Future prepareApp() async {
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if (kIsWeb) {
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// web mode - connect via HTTP
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pageUrl = Uri.base.toString();
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@ -48,33 +132,163 @@ Future<List<String>> prepareApp() async {
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setPathUrlStrategy();
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}
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} else {
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await setupDesktop();
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// extract app from asset
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var appDir = await extractAssetZip("app/app.zip");
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appDir = await extractAssetZip(assetPath, checkHash: true);
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// set current directory to app path
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Directory.current = appDir;
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assetsDir = path.join(appDir, "assets");
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var environmentVariables = {
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"FLET_PLATFORM": defaultTargetPlatform.name.toLowerCase()
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};
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environmentVariables["FLET_PLATFORM"] =
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defaultTargetPlatform.name.toLowerCase();
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if (defaultTargetPlatform == TargetPlatform.windows) {
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// use TCP on Windows
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var port = int.parse("{{ cookiecutter.windows_tcp_port }}");
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pageUrl = "tcp://localhost:$port";
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environmentVariables["FLET_SERVER_PORT"] = port.toString();
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var tcpPort = await getUnusedPort();
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pageUrl = "tcp://localhost:$tcpPort";
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environmentVariables["FLET_SERVER_PORT"] = tcpPort.toString();
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} else {
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// use UDS on other platforms
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pageUrl = "flet.sock";
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environmentVariables["FLET_SERVER_UDS_PATH"] = pageUrl;
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}
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SeriousPython.runProgram(
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path.join(appDir, "{{ cookiecutter.python_module_name }}.pyc"),
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environmentVariables: environmentVariables);
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}
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return [pageUrl, assetsDir];
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return "";
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}
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Future<String?> runPythonApp() async {
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var script = pythonScript.replaceAll('{module_name}', pythonModuleName);
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var completer = Completer<String>();
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ServerSocket outSocketServer;
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String socketAddr = "";
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StringBuffer pythonOut = StringBuffer();
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if (defaultTargetPlatform == TargetPlatform.windows) {
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var tcpAddr = "127.0.0.1";
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outSocketServer = await ServerSocket.bind(tcpAddr, 0);
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debugPrint(
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'Python output TCP Server is listening on port ${outSocketServer.port}');
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socketAddr = "$tcpAddr:${outSocketServer.port}";
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} else {
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socketAddr = "stdout.sock";
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outSocketServer = await ServerSocket.bind(
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InternetAddress(socketAddr, type: InternetAddressType.unix), 0);
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debugPrint('Python output Socket Server is listening on $socketAddr');
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}
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environmentVariables["FLET_PYTHON_CALLBACK_SOCKET_ADDR"] = socketAddr;
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void closeOutServer() async {
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outSocketServer.close();
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int exitCode = int.tryParse(pythonOut.toString().trim()) ?? 0;
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if (exitCode == errorExitCode) {
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var out = "";
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if (await File(outLogFilename).exists()) {
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out = await File(outLogFilename).readAsString();
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}
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completer.complete(out);
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} else {
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exit(exitCode);
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}
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}
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outSocketServer.listen((client) {
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debugPrint(
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'Connection from: ${client.remoteAddress.address}:${client.remotePort}');
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client.listen((data) {
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var s = String.fromCharCodes(data);
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pythonOut.write(s);
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}, onError: (error) {
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client.close();
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closeOutServer();
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}, onDone: () {
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client.close();
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closeOutServer();
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});
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});
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// run python async
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SeriousPython.runProgram(path.join(appDir, "$pythonModuleName.pyc"),
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script: script, environmentVariables: environmentVariables);
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// wait for client connection to close
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return completer.future;
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}
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class ErrorScreen extends StatelessWidget {
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final String title;
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final String text;
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const ErrorScreen({super.key, required this.title, required this.text});
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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body: SafeArea(
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child: Container(
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padding: const EdgeInsets.all(8),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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Text(
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title,
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style: Theme.of(context).textTheme.titleMedium,
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),
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TextButton.icon(
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onPressed: () {
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Clipboard.setData(ClipboardData(text: text));
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('Copied to clipboard')),
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);
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},
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icon: const Icon(
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Icons.copy,
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size: 16,
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),
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label: const Text("Copy"),
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)
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],
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),
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Expanded(
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child: SingleChildScrollView(
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child: SelectableText(text,
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style: Theme.of(context).textTheme.bodySmall),
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))
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],
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),
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)),
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);
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}
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}
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class BlankScreen extends StatelessWidget {
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const BlankScreen({
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super.key,
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});
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@override
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Widget build(BuildContext context) {
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return const Scaffold(
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body: SizedBox.shrink(),
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);
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}
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}
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Future<int> getUnusedPort() {
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return ServerSocket.bind("127.0.0.1", 0).then((socket) {
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var port = socket.port;
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socket.close();
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return port;
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});
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}
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@ -11,7 +11,7 @@ dependencies:
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flutter:
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sdk: flutter
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serious_python: ^0.6.1
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serious_python: ^0.7.0
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# serious_python:
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# git:
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# url: https://github.com/flet-dev/serious-python
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