113 lines
4.0 KiB
C#
113 lines
4.0 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using Xilium.CefGlue;
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using Lskj.Business;
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namespace Lskj.Control.BrowserSetting
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{
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public class BsRequestHandler : CefRequestHandler
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{
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private readonly CefResourceRequestHandler externalProtocolResourceRequestHandler = new BsExternalProtocolResourceRequestHandler();
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protected override CefResourceRequestHandler GetResourceRequestHandler(CefBrowser browser, CefFrame frame, CefRequest request, bool isNavigation, bool isDownload, string requestInitiator, ref bool disableDefaultHandling)
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{
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if (BsExternalProtocolHandler.IsPrintProtocol(request.Url))
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return externalProtocolResourceRequestHandler;
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return null;
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}
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protected override bool OnBeforeBrowse(CefBrowser browser, CefFrame frame, CefRequest request, bool userGesture, bool isRedirect)
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{
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string url = request.Url;
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if (BsExternalProtocolHandler.IsPrintProtocol(url))
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{
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if (frame == null || frame.IsMain)
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{
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BsExternalProtocolHandler.TryHandle(url);
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return true;
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}
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return false;
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}
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return base.OnBeforeBrowse(browser, frame, request, userGesture, isRedirect);
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}
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protected override bool OnOpenUrlFromTab(CefBrowser browser, CefFrame frame, string targetUrl, CefWindowOpenDisposition targetDisposition, bool userGesture)
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{
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if (BsExternalProtocolHandler.TryHandle(targetUrl))
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return true;
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return base.OnOpenUrlFromTab(browser, frame, targetUrl, targetDisposition, userGesture);
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}
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protected override void OnRenderProcessTerminated(CefBrowser browser, CefTerminationStatus status)
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{
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// Reloading immediately from this callback can create a new
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// renderer while the old one is tearing down and cause a native
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// libcef crash loop. Record the termination and let the module
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// lifecycle decide whether a later reopen is appropriate.
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LogUtil.WriteError("CEF 渲染进程已终止，状态=" + status,
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new InvalidOperationException("CEF renderer termination status=" + status));
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}
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}
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internal static class BsExternalProtocolHandler
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{
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private const string PrintProtocol = "lskjprint:";
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public static bool IsPrintProtocol(string url)
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{
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return !string.IsNullOrEmpty(url) && url.StartsWith(PrintProtocol, StringComparison.OrdinalIgnoreCase);
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}
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public static bool TryHandle(string url)
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{
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if (!IsPrintProtocol(url))
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return false;
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try
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{
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var processStartInfo = new System.Diagnostics.ProcessStartInfo(url)
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{
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UseShellExecute = true
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};
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System.Diagnostics.Process.Start(processStartInfo);
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}
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catch (Exception ex)
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{
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System.Windows.Forms.MessageBox.Show(
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"打开打印程序失败：" + ex.Message,
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"提示",
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System.Windows.Forms.MessageBoxButtons.OK,
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System.Windows.Forms.MessageBoxIcon.Warning);
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}
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return true;
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}
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}
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internal sealed class BsExternalProtocolResourceRequestHandler : CefResourceRequestHandler
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{
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protected override CefCookieAccessFilter GetCookieAccessFilter(CefBrowser browser, CefFrame frame, CefRequest request)
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{
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return null;
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}
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protected override void OnProtocolExecution(CefBrowser browser, CefFrame frame, CefRequest request, ref bool allowOsExecution)
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{
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if (BsExternalProtocolHandler.IsPrintProtocol(request.Url))
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{
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allowOsExecution = true;
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return;
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}
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base.OnProtocolExecution(browser, frame, request, ref allowOsExecution);
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}
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}
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}
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