code.grnet.gr Git - pithos-web-client/blob - src/org/gss_project/gss/web/client/rest/RestCommand.java

   1 /*
   2  * Copyright 2009 Electronic Business Systems Ltd.
   3  *
   4  * This file is part of GSS.
   5  *
   6  * GSS is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GSS is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GSS.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 package org.gss_project.gss.web.client.rest;
  20
  21 import org.gss_project.gss.web.client.GSS;
  22 import org.gss_project.gss.web.client.SessionExpiredDialog;
  23
  24 import com.google.gwt.http.client.RequestBuilder;
  25 import com.google.gwt.user.client.IncrementalCommand;
  26
  27 /**
  28  * @author kman
  29  */
  30 public abstract class RestCommand implements IncrementalCommand {
  31         protected boolean showLoadingIndicator = true;
  32
  33         protected void handleHeaders(String username, RequestBuilder requestBuilder, String path) {
  34                 String date = getDate();
  35                 requestBuilder.setHeader("X-GSS-Date", date);
  36
  37                 GSS app = GSS.get();
  38                 String token = app.getToken();
  39                 if (token == null)
  40                         token = "aa";
  41                 String resource = path.substring(app.getApiPath().length()-1,path.length());
  42                 String sig = calculateSig(requestBuilder.getHTTPMethod(), date, resource, base64decode(token));
  43                 requestBuilder.setHeader("Authorization", username + " " + sig);
  44                 requestBuilder.setHeader("Accept", "application/json; charset=utf-8");
  45         }
  46
  47         protected void handleHeaders(RequestBuilder requestBuilder, String path) {
  48                 if (GSS.get().getCurrentUserResource() != null) {
  49                         String username = GSS.get().getCurrentUserResource().getUsername();
  50                         handleHeaders(username, requestBuilder, path);
  51                 } else
  52                         GSS.get().displayError("no username");
  53         }
  54
  55         public static native String getDate()/*-{
  56                 return (new Date()).toUTCString();
  57         }-*/;
  58
  59         public static native String getDate(Long ms)/*-{
  60         return (new Date(ms)).toUTCString();
  61         }-*/;
  62
  63         public static native String calculateSig(String method, String date, String resource, String token)/*-{
  64                 $wnd.b64pad = "=";
  65                 var q = resource.indexOf('?');
  66                 var res = q == -1? resource: resource.substring(0, q);
  67                 var data = method + date + res;
  68                 var sig = $wnd.b64_hmac_sha1(token, data);
  69                 return sig;
  70         }-*/;
  71
  72         public static native String base64decode(String encStr)/*-{
  73                 if (typeof atob === 'function') {
  74            return atob(encStr);
  75         }
  76         var base64s = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  77         var bits;
  78         var decOut = "";
  79         var i = 0;
  80         for(; i<encStr.length; i += 4){
  81             bits = (base64s.indexOf(encStr.charAt(i)) & 0xff) <<18 | (base64s.indexOf(encStr.charAt(i +1)) & 0xff) <<12 | (base64s.indexOf(encStr.charAt(i +2)) & 0xff) << 6 | base64s.indexOf(encStr.charAt(i +3)) & 0xff;
  82             decOut += String.fromCharCode((bits & 0xff0000) >>16, (bits & 0xff00) >>8, bits & 0xff);
  83         }
  84         if(encStr.charCodeAt(i -2) == 61){
  85             return(decOut.substring(0, decOut.length -2));
  86         }
  87         else if(encStr.charCodeAt(i -1) == 61){
  88             return(decOut.substring(0, decOut.length -1));
  89         }
  90         else {
  91             return(decOut);
  92         }
  93         }-*/;
  94
  95         public void onComplete() {}
  96
  97         public abstract void onError(Throwable t);
  98
  99         public String fixPath(String pathToFix) {
 100                 if(pathToFix.endsWith("/"))
 101                         return pathToFix;
 102                 return pathToFix+"/";
 103         }
 104
 105         /**
 106          * Retrieve the showLoadingIndicator.
 107          *
 108          * @return the showLoadingIndicator
 109          */
 110         public boolean isShowLoadingIndicator() {
 111                 return showLoadingIndicator;
 112         }
 113
 114         /**
 115          * Modify the showLoadingIndicator.
 116          *
 117          * @param newShowLoadingIndicator the showLoadingIndicator to set
 118          */
 119         public void setShowLoadingIndicator(boolean newShowLoadingIndicator) {
 120                 showLoadingIndicator = newShowLoadingIndicator;
 121         }
 122
 123         static void sessionExpired() {
 124                 SessionExpiredDialog dlg = new SessionExpiredDialog();
 125                 dlg.center();
 126         }
 127
 128 }