Prepare documented WhatsApp injector with portable Python bundle

whatsapp_suite/webview.py

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+"""Isolated WebView2 test host."""
+import json
+import pathlib
+import shutil
+import subprocess
+import urllib.request
+import zipfile
+from .common import BASE
+ROOT = BASE / "webview2-harmless-test"
+VERSION = "1.0.2903.40"
+
+SOURCE = r'''
+using System;
+using System.IO;
+using System.Windows.Forms;
+using Microsoft.Web.WebView2.Core;
+using Microsoft.Web.WebView2.WinForms;
+class Probe : Form {
+  WebView2 view = new WebView2();
+  string report;
+  Timer deadline = new Timer();
+  bool completed;
+  Probe(string path) {
+    report = path; ShowInTaskbar = false; Opacity = 0;
+    Controls.Add(view); view.Dock = DockStyle.Fill;
+    deadline.Interval = 45000;
+    deadline.Tick += (s,e) => Finish("{\"passed\":false,\"error\":\"timeout\"}", 2);
+    Shown += async (s,e) => {
+      deadline.Start();
+      try {
+        var env = await CoreWebView2Environment.CreateAsync(null,
+          Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "test-profile"));
+        await view.EnsureCoreWebView2Async(env);
+        var result = await view.CoreWebView2.ExecuteScriptAsync(
+          "({arithmetic:1+1,marker:'isolated-webview2-test',url:location.href})");
+        bool ok = result.Contains("\"arithmetic\":2") && result.Contains("isolated-webview2-test");
+        Finish("{\"passed\":" + (ok ? "true" : "false") +
+          ",\"method\":\"CoreWebView2.ExecuteScriptAsync\",\"external_process_injection\":false," +
+          "\"result\":" + result + "}", ok ? 0 : 1);
+      } catch(Exception ex) {
+        File.WriteAllText(report + ".error.txt", ex.ToString());
+        Finish("{\"passed\":false,\"error\":\"See .error.txt\"}", 1);
+      }
+    };
+  }
+  void Finish(string data, int code) {
+    if(completed) return; completed=true; deadline.Stop();
+    File.WriteAllText(report,data); Environment.ExitCode=code;
+    view.Dispose(); Close();
+  }
+  [STAThread] static void Main(string[] args) {
+    Application.EnableVisualStyles(); Application.Run(new Probe(args[0]));
+  }
+}
+'''
+
+def run_webview_test():
+    ROOT.mkdir(exist_ok=True)
+    package = ROOT / ('webview2-' + VERSION + '.nupkg')
+    if not package.exists():
+        urllib.request.urlretrieve(
+            'https://api.nuget.org/v3-flatcontainer/microsoft.web.webview2/' + VERSION +
+            '/microsoft.web.webview2.' + VERSION + '.nupkg', package)
+    with zipfile.ZipFile(package) as archive:
+        for name in ('lib/net462/Microsoft.Web.WebView2.Core.dll',
+                     'lib/net462/Microsoft.Web.WebView2.WinForms.dll',
+                     'runtimes/win-x64/native/WebView2Loader.dll'):
+            with archive.open(name) as src, (ROOT / pathlib.Path(name).name).open('wb') as dest:
+                shutil.copyfileobj(src, dest)
+    source = ROOT / 'Probe.cs'
+    source.write_text(SOURCE, encoding='utf-8')
+    exe = ROOT / 'Probe.exe'
+    compiler = r'C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe'
+    subprocess.run([compiler, '/nologo', '/target:winexe', '/platform:x64',
+                    '/out:' + str(exe), '/r:System.Windows.Forms.dll',
+                    '/r:System.Drawing.dll',
+                    '/r:' + str(ROOT / 'Microsoft.Web.WebView2.Core.dll'),
+                    '/r:' + str(ROOT / 'Microsoft.Web.WebView2.WinForms.dll'),
+                    str(source)], check=True, creationflags=subprocess.CREATE_NO_WINDOW)
+    report = ROOT / 'result.json'
+    report.unlink(missing_ok=True)
+    run = subprocess.run([str(exe), str(report)], cwd=ROOT, timeout=60,
+                         creationflags=subprocess.CREATE_NO_WINDOW)
+    if report.exists():
+        print(json.dumps(json.loads(report.read_text(encoding='utf-8-sig')), indent=2))
+    else:
+        raise RuntimeError('Test host exited without a report: ' + str(run.returncode))
+    return run.returncode
+