beagled/WebServices/WebFrontEnd.cs

   1 //
   2 // WebFrontEnd.cs
   3 //
   4 // Copyright (C) 2005 Novell, Inc.
   5 //
   6 // Authors:
   7 //   Vijay K. Nanjundaswamy (knvijay@novell.com)
   8 //
   9
  10 // Permission is hereby granted, free of charge, to any person obtaining a
  11 // copy of this software and associated documentation files (the "Software"),
  12 // to deal in the Software without restriction, including without limitation
  13 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  14 // and/or sell copies of the Software, and to permit persons to whom the
  15 // Software is furnished to do so, subject to the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be included in
  18 // all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  23 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  25 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  26 // DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Collections;
  31 using System.Collections.Specialized;
  32
  33 using System.Web;
  34 using System.Web.UI;
  35 using System.Web.UI.HtmlControls;
  36 using System.Web.UI.WebControls;
  37
  38 using System.Runtime.Remoting;
  39 using System.Runtime.Remoting.Channels;
  40 using System.Runtime.Remoting.Channels.Tcp;
  41
  42 using Beagle.Util;
  43 using Beagle.Daemon;
  44 using Beagle.WebService;
  45
  46 namespace WebService_CodeBehind {
  47
  48         public class BeagleWebPage: System.Web.UI.Page {
  49
  50         private static string HeaderMsg = "BeagleWebInterface: ";
  51
  52         private static string enableSessionMsg = HeaderMsg + "Please <b>enable web session tracking</b> (via Cookies or modified URL) ! <p> BeagleWeb access <i>cannot</i> function without session identification information";
  53
  54         private static string localReqOnlyMsg = HeaderMsg + "Beagle web service unavailable or access restricted to local address only !";
  55
  56         protected HtmlForm SearchForm;
  57         protected Label Output, TitleLabel;
  58         protected TextBox SearchBox;
  59         protected DropDownList sourceList;
  60         protected CheckBox      GlobalSearchCheckBox;
  61         protected Button  Search, Forward, Back;
  62
  63         const string NO_RESULTS = "No results.";
  64
  65         protected void Page_Load(Object o, EventArgs e) {
  66
  67         //note: this web-form relies on availability of Session information either through
  68         //     cookies or modified Url. It won't work if persistent session id is not available.
  69
  70                 string sessId = Session.SessionID;
  71                 Output.Visible = Back.Visible = Forward.Visible = true;
  72
  73                 if (Session["ResultsOnDisplay"] != null
  74                     && ((string)Session["ResultsOnDisplay"]).StartsWith(HeaderMsg + NO_RESULTS))                        {
  75                     Back.Visible = Forward.Visible = false;
  76                 }
  77
  78                 string actionString = null;
  79                 bool queryStringProcessed = false;
  80
  81                 string reqUrl = Request.Url.ToString();
  82                 int index = reqUrl.IndexOf(".aspx?");
  83                 if (index > 0)
  84                         actionString = reqUrl.Substring(index + ".aspx?".Length);
  85
  86                 if (!IsPostBack) {
  87                         //HTTP GET request
  88                         if (actionString == null) {
  89                                 //HTTP Get without any query string
  90                                 if (Session["ResultsOnDisplay"] == null) {
  91                                         //First access
  92                                         Output.Visible = false;
  93                                         Back.Visible = Forward.Visible = false;
  94
  95                                         int index1 = reqUrl.IndexOf(".aspx");
  96                                         if ((index1 > 0) && (index1 + ".aspx".Length < reqUrl.Length))
  97                                                         Session["InitialReqUrl"] = reqUrl.Substring(0, index1 + ".aspx".Length);
  98                                         else
  99                                                         Session["InitialReqUrl"] = reqUrl;
 100
 101                                         Session["SearchString"] = "";
 102                                         Session["Source"] = "Anywhere";
 103                                         sourceList.SelectedValue = "Anywhere";
 104
 105                                         if (Session["GlobalCheckBox"] == null) {
 106                                                 //GlobalSearchCheckBox.Visible = ((string)Session["Source"]).Equals("Anywhere");
 107                                                 //By default, NetBeagleSearch checkbox is checked for local access & unchecked for ext. access
 108                                                 GlobalSearchCheckBox.Checked = isLocalReq()? true:false;
 109                                                 Session["GlobalCheckBox"] = GlobalSearchCheckBox.Checked;
 110                                         }
 111                                 }
 112                                 else  {
 113
 114                                   //Redirected from Tile-Action invocation, restore Results
 115                                   SearchBox.Text = (string) Session["SearchString"];
 116                                   sourceList.SelectedValue = (string) Session["Source"];
 117
 118                                   Output.Text = (string) Session["ResultsOnDisplay"];
 119                                   WebBackEnd remoteObj = (WebBackEnd) Session["RemObj"];
 120                                   if (remoteObj != null) {
 121                                                 Back.Enabled = remoteObj.canBack(sessId);
 122                                                 Forward.Enabled = remoteObj.canForward(sessId);
 123                                                 GlobalSearchCheckBox.Visible = (remoteObj.NetworkBeagleActive) && (sourceList.SelectedValue.Equals("Anywhere"));
 124
 125                                                 if (!isLocalReq() && (((string)TitleLabel.Text).IndexOf("host") < 0))
 126                                                         TitleLabel.Text += "  from host: " + remoteObj.HostName;
 127                                   }
 128                                   GlobalSearchCheckBox.Checked = (bool) Session["GlobalCheckBox"];
 129                                 }
 130                         }
 131                         else    {  //HTTP-Get request with query string:
 132                                 //Initial web query initiated via HTTP Get (firefox search bar):
 133
 134                                 string searchString = null;
 135                                 NameValueCollection nvc = Request.QueryString;
 136
 137                                 if ((nvc != null) && (nvc.Count != 0) &&
 138                                                 ((searchString = nvc["text"]) != null )) {
 139
 140                                         SearchBox.Text = searchString;
 141                                         Session["SearchString"] = searchString;
 142
 143                                         string source = null;
 144                                         if ((source = nvc["source"]) != null)
 145
 146                                                         switch (source.ToLower())       {
 147
 148                                                                 case "files":           sourceList.SelectedValue = "Files";
 149                                                                                                         break;
 150                                                                 case "addressbook": sourceList.SelectedValue = "Contact";
 151                                                                                                         break;
 152                                                                 case "mail"     :               sourceList.SelectedValue = "MailMessage";
 153                                                                                                         break;
 154                                                                 case "web"      :               sourceList.SelectedValue = "WebHistory";
 155                                                                                                         break;
 156                                                                 case "chats":           sourceList.SelectedValue = "IMLog";
 157                                                                                                         break;
 158                                                                 case "anywhere":
 159                                                                 default:                        sourceList.SelectedValue = "Anywhere";
 160                                                                                                         break;
 161                                                         }
 162                                         else
 163                                                         sourceList.SelectedValue = "Anywhere";
 164
 165                                         Session["Source"] = sourceList.SelectedValue;
 166                                         GlobalSearchCheckBox.Visible = ((string)Session["Source"]).Equals("Anywhere");
 167                                         //By default, NetBeagleSearch checkbox is checked for local access & unchecked for ext. access
 168                                         GlobalSearchCheckBox.Checked = isLocalReq()? true:false;
 169                                         Session["GlobalCheckBox"] = GlobalSearchCheckBox.Checked;
 170
 171                                         if (Session["ResultsOnDisplay"] == null) {
 172
 173                                                 int index2 = reqUrl.IndexOf(".aspx");
 174                                                 if ((index2 > 0) && (index2 + ".aspx".Length < reqUrl.Length))
 175                                                         Session["InitialReqUrl"] = reqUrl.Substring(0, index2 + ".aspx".Length);
 176                                                 else
 177                                                         Session["InitialReqUrl"] = reqUrl;
 178                                         }
 179
 180                                         queryStringProcessed = true;
 181
 182                                         Search_Click(o, e);
 183
 184                                         //Redirect client to initial Beagle webaccess URL:
 185                                 Response.Redirect((string)Session["InitialReqUrl"]);
 186                                 }
 187                         }  //end else for if (actionString == null)
 188                 }  //end if (!IsPostBack)
 189
 190                 //Process Tile!Action HTTP-Get request, if user has clicked on one:
 191                 if (actionString != null && !queryStringProcessed) {
 192
 193                         WebBackEnd remoteObj = (WebBackEnd) Session["RemObj"];
 194
 195                         if (remoteObj != null) {
 196                                 if (isLocalReq())
 197                                 remoteObj.dispatchAction(sessId, actionString);
 198                         }
 199                         else {
 200                                         Output.Text = enableSessionMsg;
 201                                         Back.Visible = Forward.Visible = GlobalSearchCheckBox.Visible = false;
 202                                         return;
 203                         }
 204
 205                         //Redirect client to initial Beagle webaccess URL:
 206                         Response.Redirect((string)Session["InitialReqUrl"]);
 207                 }
 208         }
 209
 210         private bool isLocalReq() {
 211                 //tells whether request originated from local machine
 212                 return Request.Url.IsLoopback;
 213         }
 214
 215         private string convertUrls(string buf)
 216         {
 217           //Replace specific actions in URL's
 218           string buf1 = buf.Replace("href=\"action:", "href=\"" + Session["InitialReqUrl"] + "?action:");
 219           string buf2 = buf1.Replace("href=\"dynaction:", "href=\"" + Session["InitialReqUrl"] + "?dynaction:");
 220
 221           //return buf2;
 222
 223           string initUrl = (string) Session["InitialReqUrl"];
 224           int i = initUrl.LastIndexOf('/');
 225
 226           //Get the initial part of url: i.e. http://localhost:8888/beagle
 227           string p = initUrl.Substring(0, i);
 228
 229           //Check if initial url was http://localhost:8888/search.aspx & add a trailing "/"
 230           if (p.EndsWith("beagle"))
 231                 p += "/";
 232           else
 233                 p += "/beagle/";
 234
 235           string s, sep = "\"";
 236           string[] list = buf2.Split('\"');
 237           for (int k = 0; k < list.Length; k++) {
 238
 239                         s = list[k];
 240                         if (s.Length > 0)  {
 241                                 string s1 =  s.Replace("file://" + ExternalStringsHack.KdePrefix,       p + "kde3");
 242                                 string s2 = s1.Replace("file://" + ExternalStringsHack.GnomePrefix, p + "gnome");
 243                                 list[k] =   s2.Replace("file://" + ExternalStringsHack.Prefix,          p + "local");
 244                         }
 245           }
 246
 247           return String.Join (sep, list);
 248         }
 249
 250         protected void Search_Click(object o, EventArgs e) {
 251
 252                 //if (IsPostBack && Session.IsNewSession)
 253                 if (Session["InitialReqUrl"] == null) {
 254                         Output.Text = enableSessionMsg;
 255                         Back.Visible = Forward.Visible = GlobalSearchCheckBox.Visible = false;
 256                         return;
 257                 }
 258
 259                 if (SearchBox.Text.Trim() == "") {
 260                         Output.Text = HeaderMsg + NO_RESULTS;
 261                         Back.Visible = Forward.Visible = false;
 262
 263                         Session["SearchString"] = SearchBox.Text;
 264                         Session["ResultsOnDisplay"] = Output.Text;
 265                         Session["GlobalCheckBox"] = GlobalSearchCheckBox.Checked;
 266                         return;
 267                 }
 268
 269                 string searchSrc = sourceList.SelectedItem.Value;
 270                 if (searchSrc.Equals("Anywhere"))
 271                         searchSrc = null;
 272
 273                 remoteChannel.Register();
 274
 275                 WebBackEnd remoteObj = (WebBackEnd) Session["RemObj"];
 276                 if (remoteObj == null) {
 277                          remoteObj = new WebBackEnd();
 278                 }
 279
 280                 if ( (remoteObj == null) || !(remoteObj.allowGlobalAccess || isLocalReq())) {
 281
 282                         Output.Text = localReqOnlyMsg;
 283                         Back.Visible = Forward.Visible = GlobalSearchCheckBox.Visible = false;
 284                         sourceList.Enabled = SearchBox.Enabled = Search.Enabled = false;
 285                         return;
 286                 }
 287
 288                 if (!isLocalReq() && (((string)TitleLabel.Text).IndexOf("host") < 0))
 289                                 TitleLabel.Text += "  from host: " + remoteObj.HostName;
 290
 291                 //Show check-box only if we have one or more NetworkedBeagle nodes configured:
 292                 bool showGlobalCheckBox = (remoteObj.NetworkBeagleActive) && (searchSrc == null);
 293
 294                 //Setup arguments for WebBackEnd:doQuery()
 295                 webArgs wargs = new webArgs();
 296                 wargs.sessId = Session.SessionID;
 297                 wargs.searchString = SearchBox.Text;
 298                 wargs.searchSource = searchSrc;
 299                 wargs.isLocalReq = isLocalReq();
 300                 wargs.globalSearch = showGlobalCheckBox?GlobalSearchCheckBox.Checked:false;
 301
 302                 string response = remoteObj.doQuery(wargs);
 303
 304                 if (response.StartsWith(NO_RESULTS))  {
 305                                 Output.Text = HeaderMsg + response;
 306                                 Back.Visible = Forward.Visible = false;
 307                 }
 308                 else {
 309                                 Output.Text = HeaderMsg + convertUrls(response);
 310                                 Back.Enabled = remoteObj.canBack(Session.SessionID);
 311                                 Forward.Enabled = remoteObj.canForward(Session.SessionID);
 312                 }
 313
 314                 GlobalSearchCheckBox.Visible = showGlobalCheckBox;
 315                 Session["GlobalCheckBox"] = GlobalSearchCheckBox.Checked;
 316                 Session["RemObj"] = remoteObj;
 317                 Session["ResultsOnDisplay"] = Output.Text;
 318                 Session["SearchString"] = SearchBox.Text;
 319                 Session["Source"] = searchSrc;
 320         }
 321
 322         protected void Back_Click(object o, EventArgs e) {
 323
 324                 WebBackEnd remoteObj = (WebBackEnd) Session["RemObj"];
 325                 //if (IsPostBack && HttpContext.Current.Session.IsNewSession)
 326                 if (remoteObj == null)  {
 327                         Output.Text = enableSessionMsg;
 328                         Back.Visible = Forward.Visible = GlobalSearchCheckBox.Visible = false;
 329                         return;
 330                 }
 331
 332                 if ( (remoteObj == null) || !(remoteObj.allowGlobalAccess || isLocalReq())) {
 333
 334                         Output.Text = localReqOnlyMsg;
 335                         Back.Visible = Forward.Visible = GlobalSearchCheckBox.Visible = false;
 336                         sourceList.Enabled = SearchBox.Enabled = Search.Enabled = false;
 337                         return;
 338                 }
 339
 340                 string sessId = Session.SessionID;
 341
 342                 SearchBox.Text = (string) Session["SearchString"];
 343                 sourceList.SelectedValue = (string) Session["Source"];
 344
 345                 //if (remoteObj == null)  { Output.Text = NO_RESULTS; return; }
 346                 string response = convertUrls(remoteObj.doBack(sessId));
 347                 Session["ResultsOnDisplay"] = Output.Text = HeaderMsg + response;
 348
 349                 GlobalSearchCheckBox.Checked = (bool)Session["GlobalCheckBox"];
 350                 Back.Enabled = (remoteObj != null) && (remoteObj.canBack(sessId));
 351                 Forward.Enabled = (remoteObj != null) && (remoteObj.canForward(sessId));
 352         }
 353
 354         protected void Forward_Click(object o, EventArgs e) {
 355
 356                 WebBackEnd remoteObj = (WebBackEnd) Session["RemObj"];
 357                 //if (IsPostBack && HttpContext.Current.Session.IsNewSession)
 358                 if (remoteObj == null) {
 359                         Output.Text = enableSessionMsg;
 360                         Back.Visible = Forward.Visible = GlobalSearchCheckBox.Visible = false;
 361                         return;
 362                 }
 363
 364                 if ( (remoteObj == null) || !(remoteObj.allowGlobalAccess || isLocalReq())) {
 365
 366                         Output.Text = localReqOnlyMsg;
 367                         Back.Visible = Forward.Visible = GlobalSearchCheckBox.Visible = false;
 368                         sourceList.Enabled = SearchBox.Enabled = Search.Enabled = false;
 369                         return;
 370                 }
 371
 372                 string sessId = Session.SessionID;
 373                 SearchBox.Text = (string) Session["SearchString"];
 374                 sourceList.SelectedValue = (string) Session["Source"];
 375
 376                 //if (remoteObj == null)  { Output.Text = NO_RESULTS; return; }
 377                 string response = convertUrls(remoteObj.doForward(sessId));
 378                 Session["ResultsOnDisplay"] = Output.Text = HeaderMsg + response;
 379
 380                 GlobalSearchCheckBox.Checked = (bool)Session["GlobalCheckBox"];
 381                 Back.Enabled = (remoteObj != null) && (remoteObj.canBack(sessId));
 382                 Forward.Enabled = (remoteObj != null) && (remoteObj.canForward(sessId));
 383         }
 384    }
 385 }