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Browser.cs
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Browser.cs
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using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using PuppeteerSharp.Helpers;
using PuppeteerSharp.Helpers.Json;
using PuppeteerSharp.Messaging;
namespace PuppeteerSharp
{
/// <inheritdoc/>
public class Browser : IBrowser
{
/// <summary>
/// Time in milliseconds for process to exit gracefully.
/// </summary>
private const int CloseTimeout = 5000;
private readonly ConcurrentDictionary<string, BrowserContext> _contexts;
private readonly ILogger<Browser> _logger;
private readonly Func<TargetInfo, bool> _targetFilterCallback;
private readonly Func<TargetInfo, bool> _isPageTargetFunc;
private readonly BrowserContext _defaultContext;
private readonly CustomQueriesManager _customQueriesManager = new();
private readonly Func<Task> _closeCallback;
private Task _closeTask;
internal Browser(
Product? product,
Connection connection,
string[] contextIds,
bool ignoreHTTPSErrors,
ViewPortOptions defaultViewport,
LauncherBase launcher,
Func<Task> closeCallback = null,
Func<TargetInfo, bool> targetFilter = null,
Func<TargetInfo, bool> isPageTargetFunc = null)
{
IgnoreHTTPSErrors = ignoreHTTPSErrors;
DefaultViewport = defaultViewport;
ScreenshotTaskQueue = new TaskQueue();
Launcher = launcher;
Connection = connection;
_closeCallback = closeCallback;
_targetFilterCallback = targetFilter ?? ((TargetInfo _) => true);
_logger = Connection.LoggerFactory.CreateLogger<Browser>();
_isPageTargetFunc =
isPageTargetFunc ??
new Func<TargetInfo, bool>((TargetInfo target) =>
{
return
target.Type == TargetType.Page ||
target.Type == TargetType.BackgroundPage ||
target.Type == TargetType.Webview;
});
_defaultContext = new BrowserContext(Connection, this, null);
_contexts = new ConcurrentDictionary<string, BrowserContext>(contextIds.ToDictionary(
contextId => contextId,
contextId => new BrowserContext(Connection, this, contextId)));
if (product == Product.Firefox)
{
TargetManager = new FirefoxTargetManager(
connection,
CreateTarget,
_targetFilterCallback);
}
else
{
TargetManager = new ChromeTargetManager(
connection,
CreateTarget,
_targetFilterCallback);
}
}
/// <inheritdoc/>
public event EventHandler Closed;
/// <inheritdoc/>
public event EventHandler Disconnected;
/// <inheritdoc/>
public event EventHandler<TargetChangedArgs> TargetChanged;
/// <inheritdoc/>
public event EventHandler<TargetChangedArgs> TargetCreated;
/// <inheritdoc/>
public event EventHandler<TargetChangedArgs> TargetDestroyed;
/// <inheritdoc/>
public event EventHandler<TargetChangedArgs> TargetDiscovered;
/// <inheritdoc/>
public string WebSocketEndpoint => Connection.Url;
/// <inheritdoc/>
public Process Process => Launcher?.Process;
/// <inheritdoc/>
public bool IgnoreHTTPSErrors { get; set; }
/// <inheritdoc/>
public bool IsClosed
{
get
{
if (Launcher == null)
{
return Connection.IsClosed;
}
return _closeTask != null && _closeTask.IsCompleted;
}
}
/// <inheritdoc/>
public IBrowserContext DefaultContext => _defaultContext;
/// <inheritdoc/>
public int DefaultWaitForTimeout { get; set; } = Puppeteer.DefaultTimeout;
/// <inheritdoc/>
public bool IsConnected => !Connection.IsClosed;
/// <inheritdoc/>
public ITarget Target => Targets().FirstOrDefault(t => t.Type == TargetType.Browser);
internal TaskQueue ScreenshotTaskQueue { get; set; }
internal Connection Connection { get; }
internal ViewPortOptions DefaultViewport { get; }
internal LauncherBase Launcher { get; set; }
internal CustomQueriesManager CustomQueriesManager => _customQueriesManager;
internal ITargetManager TargetManager { get; }
/// <inheritdoc/>
public Task<IPage> NewPageAsync() => _defaultContext.NewPageAsync();
/// <inheritdoc/>
public ITarget[] Targets() => TargetManager.GetAvailableTargets().Values.ToArray();
/// <inheritdoc/>
public async Task<IBrowserContext> CreateIncognitoBrowserContextAsync()
{
var response = await Connection.SendAsync<CreateBrowserContextResponse>("Target.createBrowserContext", null).ConfigureAwait(false);
var context = new BrowserContext(Connection, this, response.BrowserContextId);
_contexts.TryAdd(response.BrowserContextId, context);
return context;
}
/// <inheritdoc/>
public IBrowserContext[] BrowserContexts()
{
var contexts = _contexts.Values.ToArray<IBrowserContext>();
var allContexts = new IBrowserContext[contexts.Length + 1];
allContexts[0] = _defaultContext;
contexts.CopyTo(allContexts, 1);
return allContexts;
}
/// <inheritdoc/>
public async Task<IPage[]> PagesAsync()
=> (await Task.WhenAll(
BrowserContexts().Select(t => t.PagesAsync())).ConfigureAwait(false))
.SelectMany(p => p).ToArray();
/// <inheritdoc/>
public async Task<string> GetVersionAsync()
=> (await Connection.SendAsync<BrowserGetVersionResponse>("Browser.getVersion").ConfigureAwait(false)).Product;
/// <inheritdoc/>
public async Task<string> GetUserAgentAsync()
=> (await Connection.SendAsync<BrowserGetVersionResponse>("Browser.getVersion").ConfigureAwait(false)).UserAgent;
/// <inheritdoc/>
public void Disconnect()
{
Connection.Dispose();
Detach();
}
/// <inheritdoc/>
public Task CloseAsync() => _closeTask ?? (_closeTask = CloseCoreAsync());
/// <inheritdoc/>
public async Task<ITarget> WaitForTargetAsync(Func<ITarget, bool> predicate, WaitForOptions options = null)
{
if (predicate == null)
{
throw new ArgumentNullException(nameof(predicate));
}
var timeout = options?.Timeout ?? DefaultWaitForTimeout;
var targetCompletionSource = new TaskCompletionSource<ITarget>(TaskCreationOptions.RunContinuationsAsynchronously);
void TargetHandler(object sender, TargetChangedArgs e)
{
if (predicate(e.Target))
{
targetCompletionSource.TrySetResult(e.Target);
}
}
try
{
TargetCreated += TargetHandler;
TargetChanged += TargetHandler;
var existingTarget = Targets().FirstOrDefault(predicate);
if (existingTarget != null)
{
return existingTarget;
}
return await targetCompletionSource.Task.WithTimeout(timeout).ConfigureAwait(false);
}
finally
{
TargetCreated -= TargetHandler;
TargetChanged -= TargetHandler;
}
}
/// <inheritdoc/>
public void RegisterCustomQueryHandler(string name, CustomQueryHandler queryHandler)
=> CustomQueriesManager.RegisterCustomQueryHandler(name, queryHandler);
/// <inheritdoc/>
public void UnregisterCustomQueryHandler(string name)
=> CustomQueriesManager.UnregisterCustomQueryHandler(name);
/// <inheritdoc/>
public void ClearCustomQueryHandlers()
=> CustomQueriesManager.ClearCustomQueryHandlers();
/// <inheritdoc />
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
/// <summary>
/// Closes <see cref="Connection"/> and any Chromium <see cref="Process"/> that was
/// created by Puppeteer.
/// </summary>
/// <returns>ValueTask.</returns>
public async ValueTask DisposeAsync()
{
await CloseAsync().ConfigureAwait(false);
await ScreenshotTaskQueue.DisposeAsync().ConfigureAwait(false);
GC.SuppressFinalize(this);
}
internal static async Task<Browser> CreateAsync(
Product? product,
Connection connection,
string[] contextIds,
bool ignoreHTTPSErrors,
ViewPortOptions defaultViewPort,
LauncherBase launcher,
Func<Task> closeCallback = null,
Func<TargetInfo, bool> targetFilter = null,
Func<TargetInfo, bool> isPageTargetCallback = null,
Action<IBrowser> initAction = null)
{
var browser = new Browser(
product,
connection,
contextIds,
ignoreHTTPSErrors,
defaultViewPort,
launcher,
closeCallback,
targetFilter,
isPageTargetCallback);
try
{
initAction?.Invoke(browser);
await browser.AttachAsync().ConfigureAwait(false);
return browser;
}
catch
{
await browser.DisposeAsync().ConfigureAwait(false);
throw;
}
}
internal IEnumerable<string> GetCustomQueryHandlerNames()
=> CustomQueriesManager.GetCustomQueryHandlerNames();
internal async Task<IPage> CreatePageInContextAsync(string contextId)
{
var createTargetRequest = new TargetCreateTargetRequest
{
Url = "about:blank",
};
if (contextId != null)
{
createTargetRequest.BrowserContextId = contextId;
}
var targetId = (await Connection.SendAsync<TargetCreateTargetResponse>("Target.createTarget", createTargetRequest)
.ConfigureAwait(false)).TargetId;
var target = TargetManager.GetAvailableTargets()[targetId];
await target.InitializedTask.ConfigureAwait(false);
return await target.PageAsync().ConfigureAwait(false);
}
internal async Task DisposeContextAsync(string contextId)
{
await Connection.SendAsync("Target.disposeBrowserContext", new TargetDisposeBrowserContextRequest
{
BrowserContextId = contextId,
}).ConfigureAwait(false);
_contexts.TryRemove(contextId, out var _);
}
/// <summary>
/// Closes <see cref="Connection"/> and any Chromium <see cref="Process"/> that was
/// created by Puppeteer.
/// </summary>
/// <param name="disposing">Indicates whether disposal was initiated by <see cref="Dispose()"/> operation.</param>
protected virtual void Dispose(bool disposing) => _ = CloseAsync()
.ContinueWith(
_ => ScreenshotTaskQueue.DisposeAsync(),
TaskScheduler.Default);
private void TargetManager_TargetDiscovered(object sender, TargetChangedArgs e)
=> TargetDiscovered?.Invoke(this, e);
private void TargetManager_TargetChanged(object sender, TargetChangedArgs e)
{
var previousURL = e.Target.Url;
var wasInitialized = e.Target.IsInitialized;
e.Target.TargetInfoChanged(e.TargetInfo);
if (wasInitialized && previousURL != e.Target.Url)
{
var args = new TargetChangedArgs { Target = e.Target };
TargetChanged?.Invoke(this, args);
e.Target.BrowserContext.OnTargetChanged(this, args);
}
}
private async void TargetManager_TargetGone(object sender, TargetChangedArgs e)
{
try
{
e.Target.InitializedTaskWrapper.TrySetResult(false);
e.Target.CloseTaskWrapper.TrySetResult(true);
if (await e.Target.InitializedTask.ConfigureAwait(false))
{
var args = new TargetChangedArgs { Target = e.Target };
TargetDestroyed?.Invoke(this, args);
e.Target.BrowserContext.OnTargetDestroyed(this, args);
}
}
catch (Exception ex)
{
var message = $"Browser failed to process Connection Close. {ex.Message}. {ex.StackTrace}";
_logger.LogError(ex, message);
Connection.Close(message);
}
}
private async void TargetManager_TargetAvailable(object sender, TargetChangedArgs e)
{
try
{
if (await e.Target.InitializedTask.ConfigureAwait(false))
{
var args = new TargetChangedArgs { Target = e.Target };
TargetCreated?.Invoke(this, args);
e.Target.BrowserContext.OnTargetCreated(this, args);
}
}
catch (Exception ex)
{
var message = $"Browser failed to process Target Available. {ex.Message}. {ex.StackTrace}";
_logger.LogError(ex, message);
}
}
private async Task CloseCoreAsync()
{
try
{
try
{
// Initiate graceful browser close operation but don't await it just yet,
// because we want to ensure process shutdown first.
var browserCloseTask = Connection.IsClosed
? Task.CompletedTask
: Connection.SendAsync("Browser.close", null);
if (Launcher != null)
{
// Notify process that exit is expected, but should be enforced if it
// doesn't occur withing the close timeout.
var closeTimeout = TimeSpan.FromMilliseconds(CloseTimeout);
await Launcher.EnsureExitAsync(closeTimeout).ConfigureAwait(false);
}
// Now we can safely await the browser close operation without risking keeping chromium
// process running for indeterminate period.
await browserCloseTask.ConfigureAwait(false);
}
finally
{
Disconnect();
}
}
catch (Exception ex)
{
_logger.LogError(ex, ex.Message);
if (Launcher != null)
{
await Launcher.KillAsync().ConfigureAwait(false);
}
}
Closed?.Invoke(this, new EventArgs());
}
private async void Connection_Disconnected(object sender, EventArgs e)
{
try
{
await CloseAsync().ConfigureAwait(false);
Disconnected?.Invoke(this, new EventArgs());
}
catch (Exception ex)
{
var message = $"Browser failed to process Connection Close. {ex.Message}. {ex.StackTrace}";
_logger.LogError(ex, message);
Connection.Close(message);
}
}
private Task AttachAsync()
{
Connection.Disconnected += Connection_Disconnected;
TargetManager.TargetAvailable += TargetManager_TargetAvailable;
TargetManager.TargetGone += TargetManager_TargetGone;
TargetManager.TargetChanged += TargetManager_TargetChanged;
TargetManager.TargetDiscovered += TargetManager_TargetDiscovered;
return TargetManager.InitializeAsync();
}
private void Detach()
{
Connection.Disconnected -= Connection_Disconnected;
TargetManager.TargetAvailable -= TargetManager_TargetAvailable;
TargetManager.TargetGone -= TargetManager_TargetGone;
TargetManager.TargetChanged -= TargetManager_TargetChanged;
TargetManager.TargetDiscovered -= TargetManager_TargetDiscovered;
}
private Target CreateTarget(TargetInfo targetInfo, CDPSession session)
{
var browserContextId = targetInfo.BrowserContextId;
if (!(browserContextId != null && _contexts.TryGetValue(browserContextId, out var context)))
{
context = _defaultContext;
}
return new Target(
targetInfo,
session,
context,
TargetManager,
(bool isAutoAttachEmulated) => Connection.CreateSessionAsync(targetInfo, isAutoAttachEmulated),
IgnoreHTTPSErrors,
DefaultViewport,
ScreenshotTaskQueue,
_isPageTargetFunc);
}
}
}