| /* |
| * Copyright 2006 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package com.google.gwt.dev.shell.ie; |
| |
| import com.google.gwt.core.ext.TreeLogger; |
| import com.google.gwt.util.tools.Utility; |
| |
| import java.io.File; |
| import java.io.IOException; |
| |
| /** |
| * Various low-level helper methods for dealing with COM and such. |
| */ |
| class LowLevelIE6 { |
| |
| private static boolean sInitialized = false; |
| |
| /** |
| * Does an HTTP GET that works with Windows proxy settings. Set the system |
| * property <code>gwt.debugLowLevelHttpGet</code> to print failure status |
| * codes to stderr. |
| * |
| * @param userAgent the user-agent to specify for the GET |
| * @param url the absolute URL to GET |
| * @return the bytes of the full response (including headers), or |
| * <code>null</code> if there's a problem |
| */ |
| public static byte[] httpGet(TreeLogger branch, String userAgent, String url, |
| boolean debugFlag) { |
| if (!init()) { |
| return null; |
| } |
| byte[][] out = new byte[1][]; |
| int status = _httpGet(userAgent, url, out); |
| if (status == 0) { |
| return out[0]; |
| } else { |
| if (debugFlag) { |
| branch.log(TreeLogger.ERROR, "GET failed with status " + status |
| + " for " + url); |
| } |
| return null; |
| } |
| } |
| |
| public static synchronized boolean init() { |
| if (!sInitialized) { |
| File lib = new File(Utility.getInstallPath(), "gwt-ll.dll"); |
| if (!lib.exists()) { |
| return false; |
| } |
| try { |
| // Try to make canonical. |
| System.load(lib.getCanonicalPath()); |
| } catch (IOException e) { |
| return false; |
| } catch (UnsatisfiedLinkError e) { |
| return false; |
| } |
| sInitialized = true; |
| } |
| return true; |
| } |
| |
| // CHECKSTYLE_OFF |
| // out must be an array of size 1 to receive the array answer |
| private static native int _httpGet(String userAgent, String url, byte[][] out); |
| |
| // CHECKSTYLE_ON |
| |
| /** |
| * Not instantiable. |
| */ |
| private LowLevelIE6() { |
| } |
| } |