context.java

低版本的tomcat 对于有些老版本的应用还真的需要老版的中间件

        return url;
	} catch( IOException ex ) {
	    ex.printStackTrace();
	    return null;
	}
    }


    /**   According to Servlet 2.2 the real path is interpreted as
     *    relative to the current web app and _cannot_ go outside the 
     *    box. If your intention is different or want the "other" behavior 
     *    you'll have to first call getContext(path) and call getRealPath()
     *    on the result context ( if any - the server may disable that from
     *    security reasons !).
     *    XXX find out how can we find the context path in order to remove it
     *    from the path - that's the only way a user can do that unless he have
     *    prior knowledge of the mappings !
     */
    public String getRealPath( String path) {
	String base=getAbsolutePath();
	if( path==null ) path="";

	String realPath=FileUtil.safePath( base, path );
	// No need for a sub-request, that's a great simplification
	// in servlet space.

	// Important: that's different from what some people might
	// expect and how other server APIs work, but that's how it's
	// specified in 2.2. From a security point of view that's very
	// good, it keeps inter-webapp communication under control.
	
	if( debug>5) {
	    log("Get real path " + path + " " + realPath + " " + base );
	}
	return realPath;
    }

    /**  method to return the Localized version of the file whose
     *   name is passed as an argument. This corresponds to "file" type
     *   localization resource lookup mechanism.
     *
     *  The method performs a resource lookup in a manner similar to the
     *  one specified by java.util.ResourceBundle.
     *
     *  In the case of 'typed' files (files whose name is [file].[ftype])
     *  search for localized versions of the file are looked for:
     *
     *   file + "_" + language1 + "_" + country1 + "_" + variant1 + "." + ftype
     *   file + "_" + language1 + "_" + country1 + "." + ftype
     *   file + "_" + language1 + "." + ftype
     *   file + "_" + language2 + "_" + country2 + "_" + variant2 "." + ftype
     *   file + "_" + language2 + "_" + country2 "." + ftype
     *   file + "_" + language2 + "." + ftype
     *   file + "." + ftype
     *
     *  Where language1, country1, variant1 are associated with the Locale
     *  passed as an argument and language2, country2, variant are associated
     *  with the default Locale passed as argument.
     *
     *  For example, if the preferred Locale is <CODE>es_AR_POSIX</CODE> and 
     *  the default Locale passed is <CODE>fr_CA_WIN</CODE>, and the requested
     *  pathname is <CODE>/foo/bar/index.html</CODE>, then a search for
     *  the following localized versions of that file will be done, in order:
     *<UL>
     *<LI>/foo/bar/index_es_AR_POSIX.html</LI>
     *<LI>/foo/bar/index_es_AR.html</LI>
     *<LI>/foo/bar/index_es.html</LI>
     *<LI>/foo/bar/index_fr_CA_WIN.html</LI>
     *<LI>/foo/bar/index_fr.html</LI>
     *<LI>/foo/bar/index.html</LI>
     *</UL>
     *
     *  If the resource passed has no 'ftype' component, then the same
     *  rules above apply, with the exception that '.' + ftype are not
     *  concatenated.
     *
     *  @param path the pathname for the resource whose localized version
     *          we are seeking
     *  @param loc the Locale we are interested in.
     *  @param fbLoc the fallback Locale to use if unsuccessful
     *
     *  @return a String with the path of the "best localized match" for
     *          the file whose path has been passed as argument.
     */
    public String getRealPath (String path, Locale reqLocale, Locale fbLocale)
    {
	return getRealPath (path, reqLocale, fbLocale, "file");
    }

    /**  method to return the Localized version of the file whose
     *   name is passed as an argument. The localization is done based
     *   on localization subdirectories under the docBase.
     *
     *  The method performs a resource lookup in a manner similar to the
     *  one used for JavaHelp resources.
     *
     *  Search for localized versions of the file are looked for:
     *
     *   <docBase> + "/" + language1 + "_" + country1 + "_" + variant1 + file
     *   <docBase> + "/" + language1 + "_" + country1 + file
     *   <docBase> + "/" + language1 + file
     *   <docBase> + "/" + language2 + "_" + country2 + "_" + variant1 + file
     *   <docBase> + "/" + language2 + "_" + country2 + file
     *   <docBase> + "/" + language2 + file
     *   <docBase> + file
     *
     *  Where language1, country1, variant1 are associated with the Locale
     *  passed as an argument and language2, country2, variant are associated
     *  with the fallback Locale passed as argument.
     *
     *
     *  @param path the pathname for the resource whose localized version
     *          we are seeking
     *  @param loc the Locale we are interested in.
     *  @param fbLoc the fallback Locale to use if unsuccessful
     *  @param locType the type of localization required "file", "docbase"
     *
     *  @return a String with the path of the "best localized match" for
     *          the file whose path has been passed as argument.
     */
    public String getRealPath (String path, Locale reqLocale, Locale fbLocale,
			       String locType)
    {
        String base = getAbsolutePath();
        if (path == null) path = "";

        String realPath = null;

	if ("file".equals (locType))
	    realPath = FileUtil.getLocalizedFile (base, path,
						  reqLocale, fbLocale);
	else if ("docbase".equals (locType))
	    realPath = FileUtil.getDocBaseLocalizedFile (base, path,
						  reqLocale, fbLocale);

	if( debug>5) {
	    log("Get real path " + path + " " + realPath + " " + base
		 + reqLocale.toString() + " " + fbLocale.toString() );
	}

        return realPath;
    }

    // -------------------- Deprecated
    // tomcat specific properties
    private boolean isWorkDirPersistent = false;
    private String engineHeader = null;
    private URL documentBase;
    private URL servletBase = null;
    private boolean isInvokerEnabled = false;
    // for serving WARs directly
    private File warDir = null;
    private boolean isWARExpanded = false;
    private boolean isWARValidated = false;



    /**  @deprecated
     */
    public boolean isInvokerEnabled() {
        return isInvokerEnabled;
    }

    /**  @deprecated
     */
    public void setInvokerEnabled(boolean isInvokerEnabled) {
        this.isInvokerEnabled = isInvokerEnabled;
    }

    /**  @deprecated
     */
    public boolean isWorkDirPersistent() {
        return this.isWorkDirPersistent;
    }

    /**  @deprecated
     */
    public void setWorkDirPersistent( boolean b ) {
	isWorkDirPersistent=b;
    }

    /**  @deprecated
     */
    public File getWorkDir() {
	return workDir;
    }

    /**  @deprecated
     */
    public void setWorkDir(File workDir) {
	this.workDir = workDir;
    }

    /** Set work dir using a String property
     *  @deprecated
     */
    public void setWorkDirPath(String workDir) {
	this.workDir=new File(workDir);
    }

    /**  @deprecated
     */
    public String getEngineHeader() {
	return engineHeader;
    }

    /**  @deprecated
     */
    public void setEngineHeader(String s) {
        engineHeader=s;
    }

//     /**  @deprecated
//      */
//     public void setRequestSecurityProvider(RequestSecurityProvider rsProvider) {
// 	this.rsProvider = rsProvider;
//     }

//     /**  @deprecated
//      */
//     public RequestSecurityProvider getRequestSecurityProvider() {
// 	return this.rsProvider;
//     }

    /**  @deprecated
     */
    public File getWARDir() {
        return this.warDir;
    }

    /**  @deprecated
     */
    public void setWARDir( File f ) {
	warDir=f;
    }

    /**  @deprecated
     */
    public boolean isWARExpanded() {
        return this.isWARExpanded;
    }

    /**  @deprecated
     */
    public void setIsWARExpanded(boolean isWARExpanded) {
        this.isWARExpanded = isWARExpanded;
    }

    /**  @deprecated
     */
    public boolean isWARValidated() {
        return this.isWARValidated;
    }

    /**  @deprecated
     */
    public void setIsWARValidated(boolean isWARValidated) {
        this.isWARValidated = isWARValidated;
    }

    /**  @deprecated
     */
    public void addContextInterceptor( ContextInterceptor ci) {
	getContainer().addContextInterceptor(ci);
    }

    /** @deprecated
     */
     public ContextInterceptor[] getContextInterceptors() {
	 return getContainer().getContextInterceptors();
     }

    /**  @deprecated
     */
    public void addRequestInterceptor( RequestInterceptor ci) {
	getContainer().addRequestInterceptor(ci);
    }

    /** @deprecated
     */
    public RequestInterceptor[] getRequestInterceptors() {
	return getContainer().getRequestInterceptors();
    }
 
     /**
      * Get the SecurityManager Permissions for this Context.
      */
    public Object getPermissions() {
	return perms;
    }

    public void setPermissions( Object o ) {
	perms=o;
    }
    
    public Object getProtectionDomain() {
	return protectionDomain;
    }

    public void setProtectionDomain(Object o) {
	protectionDomain=o;
    }


    /** @deprecated - use getDocBase and URLUtil if you need it as URL
     *  NOT USED INSIDE TOMCAT - ONLY IN OLD J2EE CONNECTORS !
     */
    public URL getDocumentBase() {
	if( documentBase == null ) {
	    if( docBase == null)
		return null;
	    try {
		String absPath=docBase;

		// detect absolute path ( use the same logic in all tomcat )
		if (FileUtil.isAbsolute( docBase ) )
		    absPath=docBase;
	        else
		    absPath = contextM.getHome() + File.separator + docBase;

		try {
		    absPath = new File(absPath).getCanonicalPath();
		} catch (IOException npe) {
		}

		documentBase = new URL("file", "", absPath);

	    } catch( MalformedURLException ex ) {
		ex.printStackTrace();
	    }
	}
        return documentBase;
    }

    /** @deprecated - use setDocBase
     */
    public void setDocumentBase(URL s) {
	// Used only by startup, will be removed
        this.documentBase=s;
    }

    // -------------------- Virtual host support --------------------

    /** Make this context visible as part of a virtual host
     */
    public void setHost( String h ) {
	vhost=h;
    }

    /** Return the virtual host name, or null if we are in the
	default context
    */
    public String getHost() {
	return vhost;
    }
    
    /** Virtual host support - this context will be part of 
     *  a virtual host with the specified name. You should
     *  set all the aliases. XXX Not implemented
     */
    public void addHostAlias( String alias ) {
	vhostAliases.addElement( alias );
    }

    public Enumeration getHostAliases() {
	return vhostAliases.elements();
    }
    // -------------------- Security - trusted code -------------------- 

    
    
    public void setTrusted( boolean t ) {
	trusted=t;
    }

    public boolean isTrusted() {
	return trusted;
    }

    public boolean allowAttribute( String name ) {
	// check if we can access this attribute.
	if( isTrusted() ) return true;
	log( "Illegal access to internal attribute ", null, Logger.ERROR);
	return false;
    }
}