//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//------------------------------------------------------------------------------
/*
* Built-in browser caps object
*
* Copyright (c) 1999 Microsoft Corporation
*/
namespace System.Web {
using System.Collections;
using System.Configuration;
using System.Globalization;
using System.Text.RegularExpressions;
using System.Web.Configuration;
using System.Security.Permissions;
///
/// Enables the server to compile
/// information on the capabilities of the browser running on the client.
///
public class HttpBrowserCapabilities : HttpCapabilitiesBase {
// Lazy computation
// NOTE: The methods below are designed to work on multiple threads
// without a need for synchronization. Do NOT do something like replace
// all the _haveX booleans with bitfields or something similar, because
// the methods depend on the fact that "_haveX = true" is atomic.
///
/// Returns the .NET Common Language Runtime version running
/// on the client. If no CLR version is specified on the
/// User-Agent returns new Version(), which is 0,0.
///
/* public Version ClrVersion {
get {
ClrVersionEnsureInit();
return _clrVersion;
}
}
///
/// Returns all versions of the .NET CLR running on the
/// client. If no CLR version is specified on the User-Agent
/// returns an array containing a single empty Version object,
/// which is 0,0.
///
public Version [] GetClrVersions() {
ClrVersionEnsureInit();
return _clrVersions;
}
private void ClrVersionEnsureInit() {
if (!_haveClrVersion) {
Regex regex = new Regex("\\.NET CLR (?'clrVersion'[0-9\\.]*)");
MatchCollection matches = regex.Matches(this[String.Empty]);
if (matches.Count == 0) {
Version version = new Version();
Version [] clrVersions = new Version [1] {version};
_clrVersions = clrVersions;
_clrVersion = version;
}
else {
ArrayList versionList = new ArrayList();
foreach (Match match in matches) {
Version version = new Version(match.Groups["clrVersion"].Value);
versionList.Add(version);
}
versionList.Sort();
Version [] versions = (Version []) versionList.ToArray(typeof(Version));
_clrVersions = versions;
_clrVersion = versions[versions.Length - 1];
}
_haveClrVersion = true;
}
}
///
/// Returns the name of the client browser and its major version number. For example, "Microsoft Internet Explorer version
/// 5".
///
public string Type {
get {
if (!_havetype) {
_type = this["type"];
_havetype = true;
}
return _type;
}
}
///
/// Browser string in User Agent (for example: "IE").
///
public string Browser {
get {
if (!_havebrowser) {
_browser = this["browser"];
_havebrowser = true;
}
return _browser;
}
}
///
/// Returns the major version number + minor version number
/// of the client browser; for example: "5.5".
///
public string Version {
get {
if (!_haveversion) {
_version = this["version"];
_haveversion = true;
}
return _version;
}
}
///
/// Returns the major version number of the client browser; for example: 3.
///
public int MajorVersion {
get {
if (!_havemajorversion) {
try {
_majorversion = int.Parse(this["majorversion"], CultureInfo.InvariantCulture);
_havemajorversion = true;
}
catch (FormatException e) {
throw BuildParseError(e, "majorversion");
}
}
return _majorversion;
}
}
Exception BuildParseError(Exception e, string capsKey) {
string message = SR.GetString(SR.Invalid_string_from_browser_caps, e.Message, capsKey, this[capsKey]);
// to show ConfigurationException in stack trace
ConfigurationException configEx = new ConfigurationErrorsException(message, e);
// I want it to look like an unhandled exception
HttpUnhandledException httpUnhandledEx = new HttpUnhandledException(null, null);
// but show message from outer exception (it normally shows the inner-most)
httpUnhandledEx.SetFormatter(new UseLastUnhandledErrorFormatter(configEx));
return httpUnhandledEx;
}
bool CapsParseBool(string capsKey) {
try {
return bool.Parse(this[capsKey]);
}
catch (FormatException e) {
throw BuildParseError(e, capsKey);
}
}
///
/// Returns the minor version number of the client browser; for example: .01.
///
public double MinorVersion {
get {
if (!_haveminorversion) {
try {
// see ASURT 11176
_minorversion = double.Parse(
this["minorversion"],
NumberStyles.Float | NumberStyles.AllowDecimalPoint,
NumberFormatInfo.InvariantInfo);
_haveminorversion = true;
}
catch (FormatException e) {
throw BuildParseError(e, "majorversion");
}
}
return _minorversion;
}
}
///
/// Returns the platform's name; for example, "Win32".
///
public string Platform {
get {
if (!_haveplatform) {
_platform = this["platform"];
_haveplatform = true;
}
return _platform;
}
}
///
/// [To be supplied.]
///
public Type TagWriter {
get {
try {
if (!_havetagwriter) {
string tagWriter = this["tagwriter"];
if (String.IsNullOrEmpty(tagWriter)) {
_tagwriter = null;
}
else if (string.Compare(tagWriter, typeof(System.Web.UI.HtmlTextWriter).FullName, false, CultureInfo.InvariantCulture) == 0) {
_tagwriter= typeof(System.Web.UI.HtmlTextWriter);
}
else {
_tagwriter = System.Type.GetType(tagWriter, true /*throwOnError*///);
/* }
_havetagwriter = true;
}
}
catch (Exception e) {
throw BuildParseError(e, "tagwriter");
}
return _tagwriter;
}
}
///
/// [To be supplied.]
///
public Version EcmaScriptVersion {
get {
if (!_haveecmascriptversion) {
_ecmascriptversion = new Version(this["ecmascriptversion"]);
_haveecmascriptversion = true;
}
return _ecmascriptversion;
}
}
///
/// [To be supplied.]
///
public Version MSDomVersion {
get {
if (!_havemsdomversion) {
_msdomversion = new Version(this["msdomversion"]);
_havemsdomversion = true;
}
return _msdomversion;
}
}
///
/// [To be supplied.]
///
public Version W3CDomVersion {
get {
if (!_havew3cdomversion) {
_w3cdomversion = new Version(this["w3cdomversion"]);
_havew3cdomversion = true;
}
return _w3cdomversion;
}
}
///
/// Indicates whether the browser client is in beta.
///
public bool Beta {
get {
if (!_havebeta) {
_beta = CapsParseBool("beta");
_havebeta = true;
}
return _beta;
}
}
///
/// Indicates whether the client browser is a Web-crawling search engine.
///
public bool Crawler {
get {
if (!_havecrawler) {
_crawler = CapsParseBool("crawler");
_havecrawler = true;
}
return _crawler;
}
}
///
/// Indicates whether the client is an AOL branded browser.
///
public bool AOL {
get {
if (!_haveaol) {
_aol = CapsParseBool("aol");
_haveaol = true;
}
return _aol;
}
}
///
/// Indicates whether the client is a Win16-based machine.
///
public bool Win16 {
get {
if (!_havewin16) {
_win16 = CapsParseBool("win16");
_havewin16 = true;
}
return _win16;
}
}
///
/// Indicates whether the client is a Win32-based machine.
///
public bool Win32 {
get {
if (!_havewin32) {
_win32 = CapsParseBool("win32");
_havewin32 = true;
}
return _win32;
}
}
///
/// Indicates whether the client browser supports HTML frames.
///
public bool Frames {
get {
if (!_haveframes) {
_frames = CapsParseBool("frames");
_haveframes = true;
}
return _frames;
}
}
///
/// Indicates whether the client browser supports the bold tag.
///
public bool SupportsBold {
get {
if (!_havesupportsbold) {
_supportsbold = CapsParseBool("supportsBold");
_havesupportsbold = true;
}
return _supportsbold;
}
}
///
/// Indicates whether the client browser supports the italic tag.
///
public bool SupportsItalic {
get {
if (!_havesupportsitalic) {
_supportsitalic = CapsParseBool("supportsItalic");
_havesupportsitalic = true;
}
return _supportsitalic;
}
}
///
/// Indicates whether the client browser supports tables.
///
public bool Tables {
get {
if (!_havetables) {
_tables = CapsParseBool("tables");
_havetables = true;
}
return _tables;
}
}
///
/// Indicates whether the client browser supports cookies.
///
public bool Cookies {
get {
if (!_havecookies) {
_cookies = CapsParseBool("cookies");
_havecookies = true;
}
return _cookies;
}
}
///
/// Indicates whether the client browser supports VBScript.
///
public bool VBScript {
get {
if (!_havevbscript) {
_vbscript = CapsParseBool("vbscript");
_havevbscript = true;
}
return _vbscript;
}
}
///
/// Indicates whether the client browser supports JavaScript.
///
[Obsolete("Use EcmaScriptVersion instead of Javascript. Major versions greater than or equal to one imply javascript support.")]
public bool JavaScript {
get {
if (!_havejavascript) {
_javascript=CapsParseBool("javascript");
_havejavascript = true;
}
return _javascript;
}
}
///
/// Indicates whether the client browser supports Java Applets.
///
public bool JavaApplets {
get {
if (!_havejavaapplets) {
_javaapplets=CapsParseBool("javaapplets");
_havejavaapplets = true;
}
return _javaapplets;
}
}
///
/// Indicates whether the client browser supports ActiveX Controls.
///
public bool ActiveXControls {
get {
if (!_haveactivexcontrols) {
_activexcontrols=CapsParseBool("activexcontrols");
_haveactivexcontrols = true;
}
return _activexcontrols;
}
}
///
/// Indicates whether the client browser supports background sounds.
///
public bool BackgroundSounds {
get {
if (!_havebackgroundsounds) {
_backgroundsounds=CapsParseBool("backgroundsounds");
_havebackgroundsounds = true;
}
return _backgroundsounds;
}
}
///
/// Indicates whether the client browser supports Channel Definition Format (CDF) for webcasting.
///
public bool CDF {
get {
if (!_havecdf) {
_cdf = CapsParseBool("cdf");
_havecdf = true;
}
return _cdf;
}
}
private string _type;
private string _browser;
private string _version;
private int _majorversion;
private double _minorversion;
private string _platform;
private Type _tagwriter;
private Version _ecmascriptversion;
private Version _msdomversion;
private Version _w3cdomversion;
private Version _clrVersion;
private Version [] _clrVersions;
private bool _beta;
private bool _crawler;
private bool _aol;
private bool _win16;
private bool _win32;
private bool _frames;
private bool _supportsbold;
private bool _supportsitalic;
private bool _tables;
private bool _cookies;
private bool _vbscript;
private bool _javascript;
private bool _javaapplets;
private bool _activexcontrols;
private bool _backgroundsounds;
private bool _cdf;
private bool _havetype;
private bool _havebrowser;
private bool _haveversion;
private bool _havemajorversion;
private bool _haveminorversion;
private bool _haveplatform;
private bool _havetagwriter;
private bool _haveecmascriptversion;
private bool _havemsdomversion;
private bool _havew3cdomversion;
private bool _haveClrVersion;
private bool _havebeta;
private bool _havecrawler;
private bool _haveaol;
private bool _havewin16;
private bool _havewin32;
private bool _haveframes;
private bool _havesupportsbold;
private bool _havesupportsitalic;
private bool _havetables;
private bool _havecookies;
private bool _havevbscript;
private bool _havejavascript;
private bool _havejavaapplets;
private bool _haveactivexcontrols;
private bool _havebackgroundsounds;
private bool _havecdf;
*/
}
}