--- /dev/null
+// Copyright 2002 Adam Megacz, see the COPYING file for licensing [GPL]
+package org.xwt;
+
+import java.net.*;
+import java.io.*;
+import java.util.*;
+import org.xwt.util.*;
+import org.mozilla.javascript.*;
+import org.bouncycastle.util.encoders.Base64;
+
+/** encapsulates most of the proxy logic; some is shared in HTTP.java */
+public class Proxy {
+
+ public Proxy() { }
+
+ /** the HTTP Proxy host to use */
+ public String httpProxyHost = null;
+
+ /** the HTTP Proxy port to use */
+ public int httpProxyPort = -1;
+
+ /** if a seperate proxy should be used for HTTPS, this is the hostname; otherwise, httpProxyHost is used */
+ public String httpsProxyHost = null;
+
+ /** if a seperate proxy should be used for HTTPS, this is the port */
+ public int httpsProxyPort = -1;
+
+ /** the SOCKS Proxy Host to use */
+ public String socksProxyHost = null;
+
+ /** the SOCKS Proxy Port to use */
+ public int socksProxyPort = -1;
+
+ /** hosts to be excluded from proxy use; wildcards permitted */
+ public String[] excluded = null;
+
+ /** the PAC script */
+ public Function proxyAutoConfigFunction = null;
+
+ public static Proxy detectProxyViaManual() {
+ Proxy ret = new Proxy();
+
+ ret.httpProxyHost = Platform.getEnv("http_proxy");
+ if (ret.httpProxyHost != null) {
+ if (ret.httpProxyHost.startsWith("http://")) ret.httpProxyHost = ret.httpProxyHost.substring(7);
+ if (ret.httpProxyHost.endsWith("/")) ret.httpProxyHost = ret.httpProxyHost.substring(0, ret.httpProxyHost.length() - 1);
+ if (ret.httpProxyHost.indexOf(':') != -1) {
+ ret.httpProxyPort = Integer.parseInt(ret.httpProxyHost.substring(ret.httpProxyHost.indexOf(':') + 1));
+ ret.httpProxyHost = ret.httpProxyHost.substring(0, ret.httpProxyHost.indexOf(':'));
+ } else {
+ ret.httpProxyPort = 80;
+ }
+ }
+
+ ret.httpsProxyHost = Platform.getEnv("https_proxy");
+ if (ret.httpsProxyHost != null) {
+ if (ret.httpsProxyHost.startsWith("https://")) ret.httpsProxyHost = ret.httpsProxyHost.substring(7);
+ if (ret.httpsProxyHost.endsWith("/")) ret.httpsProxyHost = ret.httpsProxyHost.substring(0, ret.httpsProxyHost.length() - 1);
+ if (ret.httpsProxyHost.indexOf(':') != -1) {
+ ret.httpsProxyPort = Integer.parseInt(ret.httpsProxyHost.substring(ret.httpsProxyHost.indexOf(':') + 1));
+ ret.httpsProxyHost = ret.httpsProxyHost.substring(0, ret.httpsProxyHost.indexOf(':'));
+ } else {
+ ret.httpsProxyPort = 80;
+ }
+ }
+
+ ret.socksProxyHost = Platform.getEnv("socks_proxy");
+ if (ret.socksProxyHost != null) {
+ if (ret.socksProxyHost.startsWith("socks://")) ret.socksProxyHost = ret.socksProxyHost.substring(7);
+ if (ret.socksProxyHost.endsWith("/")) ret.socksProxyHost = ret.socksProxyHost.substring(0, ret.socksProxyHost.length() - 1);
+ if (ret.socksProxyHost.indexOf(':') != -1) {
+ ret.socksProxyPort = Integer.parseInt(ret.socksProxyHost.substring(ret.socksProxyHost.indexOf(':') + 1));
+ ret.socksProxyHost = ret.socksProxyHost.substring(0, ret.socksProxyHost.indexOf(':'));
+ } else {
+ ret.socksProxyPort = 80;
+ }
+ }
+
+ String noproxy = Platform.getEnv("no_proxy");
+ if (noproxy != null) {
+ StringTokenizer st = new StringTokenizer(noproxy, ",");
+ ret.excluded = new String[st.countTokens()];
+ for(int i=0; st.hasMoreTokens(); i++) ret.excluded[i] = st.nextToken();
+ }
+
+ if (ret.httpProxyHost == null && ret.socksProxyHost == null) return null;
+ return ret;
+ }
+
+ public static Scriptable proxyAutoConfigRootScope = new ProxyAutoConfigRootScope();
+
+ public static Function getProxyAutoConfigFunction(String url) {
+ try {
+ Context cx = Context.enter();
+ cx.setOptimizationLevel(-1);
+ BufferedReader br = new BufferedReader(new InputStreamReader(new HTTP(url, true).GET()));
+ String s = null;
+ String script = "";
+ while((s = br.readLine()) != null) script += s + "\n";
+ if (Log.on) Log.log(Proxy.class, "successfully retrieved WPAD PAC:");
+ if (Log.on) Log.log(Proxy.class, script);
+
+ // MS CARP hack
+ Vector carpHosts = new Vector();
+ for(int i=0; i<script.length(); i++)
+ if (script.regionMatches(i, "new Node(", 0, 9)) {
+ String host = script.substring(i + 10, script.indexOf('\"', i + 11));
+ if (Log.on) Log.log(Proxy.class, "Detected MS Proxy Server CARP Script, Host=" + host);
+ carpHosts.addElement(host);
+ }
+ if (carpHosts.size() > 0) {
+ script = "function FindProxyForURL(url, host) {\nreturn \"";
+ for(int i=0; i<carpHosts.size(); i++)
+ script += "PROXY " + carpHosts.elementAt(i) + "; ";
+ script += "\";\n}";
+ if (Log.on) Log.log(Proxy.class, "DeCARPed PAC script:");
+ if (Log.on) Log.log(Proxy.class, script);
+ }
+
+ Script scr = cx.compileReader(proxyAutoConfigRootScope, new StringReader(script), "PAC script at " + url, 0, null);
+ scr.exec(cx, proxyAutoConfigRootScope);
+ return (Function)proxyAutoConfigRootScope.get("FindProxyForURL", null);
+ } catch (Exception e) {
+ if (Log.on) {
+ Log.log(Platform.class, "WPAD detection failed due to:");
+ if (e instanceof EcmaError) Log.log(HTTP.class, ((EcmaError)e).getMessage() + " at " +
+ ((EcmaError)e).getSourceName() + ":" + ((EcmaError)e).getLineNumber());
+ else Log.log(Platform.class, e);
+ }
+ return null;
+ }
+ }
+
+
+ // Authorization ///////////////////////////////////////////////////////////////////////////////////
+
+ public static class Authorization {
+
+ static public String authorization = null;
+ static public String authorization2 = null;
+ static public Semaphore waitingForUser = new Semaphore();
+
+ public static synchronized void getPassword(final String realm, final String style, final String proxyIP, String oldAuth) {
+
+ // this handles cases where multiple threads hit the proxy auth at the same time -- all but one will block on the
+ // synchronized keyword. If 'authorization' changed while the thread was blocked, it means that the user entered
+ // a password, so we should reattempt authorization.
+
+ if (authorization != oldAuth) return;
+ if (Log.on) Log.log(Authorization.class, "displaying proxy authorization dialog");
+ MessageQueue.add(new Message() {
+ public void perform() {
+ Box b = new Box("org.xwt.builtin.proxy_authorization", null);
+ b.put("realm", realm);
+ b.put("proxyIP", proxyIP);
+ }
+ });
+
+ waitingForUser.block();
+ if (Log.on) Log.log(Authorization.class, "got proxy authorization info; re-attempting connection");
+
+ }
+ }
+
+
+ // ProxyAutoConfigRootScope ////////////////////////////////////////////////////////////////////
+
+ public static class ProxyAutoConfigRootScope extends ScriptableObject {
+
+ public String getClassName() { return "ProxyAutoConfigRootScope"; }
+ ProxyAutoConfigRootScope() { Context.enter().initStandardObjects(this); }
+
+ public Object get(String name, Scriptable start) {
+ if (name.equals("isPlainHostName")) return isPlainHostName;
+ else if (name.equals("dnsDomainIs")) return dnsDomainIs;
+ else if (name.equals("localHostOrDomainIs")) return localHostOrDomainIs;
+ else if (name.equals("isResolvable")) return isResolvable;
+ else if (name.equals("isInNet")) return isInNet;
+ else if (name.equals("dnsResolve")) return dnsResolve;
+ else if (name.equals("myIpAddress")) return myIpAddress;
+ else if (name.equals("dnsDomainLevels")) return dnsDomainLevels;
+ else if (name.equals("shExpMatch")) return shExpMatch;
+ else if (name.equals("weekdayRange")) return weekdayRange;
+ else if (name.equals("dateRange")) return dateRange;
+ else if (name.equals("timeRange")) return timeRange;
+ else if (name.equals("ProxyConfig")) return ProxyConfig;
+ else return super.get(name, start);
+ }
+
+ private static final JSObject proxyConfigBindings = new JSObject();
+ private static final JSObject ProxyConfig = new JSObject() {
+ public Object get(String name, Scriptable start) {
+ if (name.equals("bindings")) return proxyConfigBindings;
+ return null;
+ }
+ };
+
+ private static abstract class JSFunction extends JSObject implements Function {
+ JSFunction() { setSeal(true); }
+ public Scriptable construct(Context cx, Scriptable scope, java.lang.Object[] args) { return null; }
+ }
+
+ private static final JSFunction isPlainHostName = new JSFunction() {
+ public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
+ return (args[0].toString().indexOf('.') == -1) ? Boolean.TRUE : Boolean.FALSE;
+ }
+ };
+
+ private static final JSFunction dnsDomainIs = new JSFunction() {
+ public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
+ return (args[0].toString().endsWith(args[1].toString())) ? Boolean.TRUE : Boolean.FALSE;
+ }
+ };
+
+ private static final JSFunction localHostOrDomainIs = new JSFunction() {
+ public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
+ return (args[0].toString().equals(args[1].toString()) ||
+ (args[0].toString().indexOf('.') == -1 && args[1].toString().startsWith(args[0].toString()))) ?
+ Boolean.TRUE : Boolean.FALSE;
+ }
+ };
+
+ private static final JSFunction isResolvable = new JSFunction() {
+ public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
+ try {
+ return (InetAddress.getByName(args[0].toString()) != null) ? Boolean.TRUE : Boolean.FALSE;
+ } catch (UnknownHostException e) {
+ return Boolean.FALSE;
+ }
+ }
+ };
+
+ private static final JSFunction isInNet = new JSFunction() {
+ public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
+ if (args.length != 3) return Boolean.FALSE;
+ try {
+ byte[] host = InetAddress.getByName(args[0].toString()).getAddress();
+ byte[] net = InetAddress.getByName(args[1].toString()).getAddress();
+ byte[] mask = InetAddress.getByName(args[2].toString()).getAddress();
+ return ((host[0] & mask[0]) == net[0] &&
+ (host[1] & mask[1]) == net[1] &&
+ (host[2] & mask[2]) == net[2] &&
+ (host[3] & mask[3]) == net[3]) ?
+ Boolean.TRUE : Boolean.FALSE;
+ } catch (Exception e) {
+ throw new JavaScriptException("exception in isInNet(): " + e);
+ }
+ }
+ };
+
+ private static final JSFunction dnsResolve = new JSFunction() {
+ public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
+ try {
+ return InetAddress.getByName(args[0].toString()).getHostAddress();
+ } catch (UnknownHostException e) {
+ return null;
+ }
+ }
+ };
+
+ private static final JSFunction myIpAddress = new JSFunction() {
+ public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
+ try {
+ return InetAddress.getLocalHost().getHostAddress();
+ } catch (UnknownHostException e) {
+ if (Log.on) Log.log(this, "strange... host does not know its own address");
+ return null;
+ }
+ }
+ };
+
+ private static final JSFunction dnsDomainLevels = new JSFunction() {
+ public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
+ String s = args[0].toString();
+ int i = 0;
+ while((i = s.indexOf('.', i)) != -1) i++;
+ return new Integer(i);
+ }
+ };
+
+ private static boolean match(String[] arr, String s, int index) {
+ if (index == arr.length) return true;
+ for(int i=0; i<s.length(); i++) {
+ String s2 = s.substring(i);
+ if (s2.startsWith(arr[index]) && match(arr, s.substring(arr[index].length()), index + 1)) return true;
+ }
+ return false;
+ }
+
+ private static final JSFunction shExpMatch = new JSFunction() {
+ public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
+ StringTokenizer st = new StringTokenizer(args[1].toString(), "*", false);
+ String[] arr = new String[st.countTokens()];
+ String s = args[0].toString();
+ for (int i=0; st.hasMoreTokens(); i++) arr[i] = st.nextToken();
+ return match(arr, s, 0) ? Boolean.TRUE : Boolean.FALSE;
+ }
+ };
+
+ public static String[] days = { "SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT" };
+
+ private static final JSFunction weekdayRange = new JSFunction() {
+ public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
+ TimeZone tz = (args.length < 3 || args[2] == null || !args[2].equals("GMT")) ? TimeZone.getTimeZone("UTC") : TimeZone.getDefault();
+ Calendar c = new GregorianCalendar();
+ c.setTimeZone(tz);
+ c.setTime(new Date());
+ Date d = c.getTime();
+ int day = d.getDay();
+
+ String d1s = args[0].toString().toUpperCase();
+ int d1 = 0, d2 = 0;
+ for(int i=0; i<days.length; i++) if (days[i].equals(d1s)) d1 = i;
+
+ if (args.length == 1)
+ return d1 == day ? Boolean.TRUE : Boolean.FALSE;
+
+ String d2s = args[1].toString().toUpperCase();
+ for(int i=0; i<days.length; i++) if (days[i].equals(d2s)) d2 = i;
+
+ return
+ ((d1 <= d2 && day >= d1 && day <= d2) ||
+ (d1 > d2 && (day >= d1 || day <= d2))) ?
+ Boolean.TRUE : Boolean.FALSE;
+ }
+ };
+
+ private static final JSFunction dateRange = new JSFunction() {
+ public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
+ throw new JavaScriptException("XWT does not support dateRange() in PAC scripts");
+ }
+ };
+
+ private static final JSFunction timeRange = new JSFunction() {
+ public Object call(Context cx, Scriptable thisObj, Scriptable ctorObj, Object[] args) throws JavaScriptException {
+ throw new JavaScriptException("XWT does not support timeRange() in PAC scripts");
+ }
+ };
+
+ }
+
+}
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