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.Threading;
  31 using System.Collections;
  32 using System.Collections.Specialized;
  33 using System.Diagnostics;
  34
  35 using System.Web;
  36 using System.Web.UI;
  37 using System.Web.UI.HtmlControls;
  38 using System.Web.UI.WebControls;
  39
  40 using System.Runtime.Remoting;
  41 using System.Runtime.Remoting.Channels;
  42 using System.Runtime.Remoting.Channels.Tcp;
  43
  44 using Beagle.Util;
  45 using Beagle.Daemon;
  46 using Beagle.WebService;
  47
  48 namespace WebService_CodeBehind {
  49
  50         public class BeagleWebPage: System.Web.UI.Page {
  51
  52         private static string HeaderMsg = "BeagleWebInterface: ";
  53
  54         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";
  55
  56         private static string localReqOnlyMsg = HeaderMsg + "Beagle web service unavailable or access restricted to local address only !";
  57
  58         protected HtmlForm SearchForm;
  59         protected Label Output, TitleLabel;
  60         protected TextBox SearchBox;
  61         protected DropDownList sourceList;
  62         protected CheckBox      GlobalSearchCheckBox;
  63         protected Button  Search, Forward, Back;
  64
  65         const string NO_RESULTS = "No results.";
  66
  67         protected void Page_Load(Object o, EventArgs e) {
  68
  69         //note: this web-form relies on availability of Session information either through
  70         //     cookies or modified Url. It won't work if persistent session id is not available.
  71
  72                 string sessId = Session.SessionID;
  73                 Output.Visible = Back.Visible = Forward.Visible = true;
  74
  75                 if (Session["ResultsOnDisplay"] != null
  76                     && ((string)Session["ResultsOnDisplay"]).StartsWith(HeaderMsg + NO_RESULTS))                        {
  77                     Back.Visible = Forward.Visible = false;
  78                 }
  79
  80                 string actionString = null;
  81                 bool queryStringProcessed = false;
  82
  83                 string reqUrl = Request.Url.ToString();
  84                 int index = reqUrl.IndexOf(".aspx?");
  85                 if (index > 0)
  86                         actionString = reqUrl.Substring(index + ".aspx?".Length);
  87
  88                 if (!IsPostBack) {
  89                         //HTTP GET request
  90                         if (actionString == null) {
  91                                 //HTTP Get without any query string
  92                                 if (Session["ResultsOnDisplay"] == null) {
  93                                         //First access
  94                                         Output.Visible = false;
  95                                         Back.Visible = Forward.Visible = false;
  96
  97                                         int index1 = reqUrl.IndexOf(".aspx");
  98                                         if ((index1 > 0) && (index1 + ".aspx".Length < reqUrl.Length))
  99                                                         Session["InitialReqUrl"] = reqUrl.Substring(0, index1 + ".aspx".Length);
 100                                         else
 101                                                         Session["InitialReqUrl"] = reqUrl;
 102
 103                                         Session["SearchString"] = "";
 104                                         Session["Source"] = "Anywhere";
 105                                         sourceList.SelectedValue = "Anywhere";
 106
 107                                         if (Session["GlobalCheckBox"] == null) {
 108                                                 //GlobalSearchCheckBox.Visible = ((string)Session["Source"]).Equals("Anywhere");
 109                                                 //By default, NetBeagleSearch checkbox is checked for local access & unchecked for ext. access
 110                                                 GlobalSearchCheckBox.Checked = isLocalReq()? true:false;
 111                                                 Session["GlobalCheckBox"] = GlobalSearchCheckBox.Checked;
 112                                         }
 113                                 }
 114                                 else  {
 115
 116                                   //Redirected from Tile-Action invocation, restore Results
 117                                   SearchBox.Text = (string) Session["SearchString"];
 118                                   sourceList.SelectedValue = (string) Session["Source"];
 119
 120                                   Output.Text = (string) Session["ResultsOnDisplay"];
 121                                   WebBackEnd remoteObj = (WebBackEnd) Session["RemObj"];
 122                                   if (remoteObj != null) {
 123                                                 Back.Enabled = remoteObj.canBack(sessId);
 124                                                 Forward.Enabled = remoteObj.canForward(sessId);
 125                                                 GlobalSearchCheckBox.Visible = (remoteObj.NetworkBeagleActive) && (sourceList.SelectedValue.Equals("Anywhere"));
 126
 127                                                 if (!isLocalReq() && (((string)TitleLabel.Text).IndexOf("host") < 0))
 128                                                         TitleLabel.Text += "  from host: " + remoteObj.HostName;
 129                                   }
 130                                   GlobalSearchCheckBox.Checked = (bool) Session["GlobalCheckBox"];
 131                                 }
 132                         }
 133                         else    {  //HTTP-Get request with query string:
 134                                 //Initial web query initiated via HTTP Get (firefox search bar):
 135
 136                                 string searchString = null;
 137                                 NameValueCollection nvc = Request.QueryString;
 138
 139                                 if ((nvc != null) && (nvc.Count != 0) &&
 140                                                 ((searchString = nvc["text"]) != null )) {
 141
 142                                         SearchBox.Text = searchString;
 143                                         Session["SearchString"] = searchString;
 144
 145                                         string source = null;
 146                                         if ((source = nvc["source"]) != null)
 147
 148                                                         switch (source.ToLower())       {
 149
 150                                                                 case "files":           sourceList.SelectedValue = "Files";
 151                                                                                                         break;
 152                                                                 case "addressbook": sourceList.SelectedValue = "Contact";
 153                                                                                                         break;
 154                                                                 case "mail"     :               sourceList.SelectedValue = "MailMessage";
 155                                                                                                         break;
 156                                                                 case "web"      :               sourceList.SelectedValue = "WebHistory";
 157                                                                                                         break;
 158                                                                 case "chats":           sourceList.SelectedValue = "IMLog";
 159                                                                                                         break;
 160                                                                 case "anywhere":
 161                                                                 default:                        sourceList.SelectedValue = "Anywhere";
 162                                                                                                         break;
 163                                                         }
 164                                         else
 165                                                         sourceList.SelectedValue = "Anywhere";
 166
 167                                         Session["Source"] = sourceList.SelectedValue;
 168                                         GlobalSearchCheckBox.Visible = ((string)Session["Source"]).Equals("Anywhere");
 169                                         //By default, NetBeagleSearch checkbox is checked for local access & unchecked for ext. access
 170                                         GlobalSearchCheckBox.Checked = isLocalReq()? true:false;
 171                                         Session["GlobalCheckBox"] = GlobalSearchCheckBox.Checked;
 172
 173                                         if (Session["ResultsOnDisplay"] == null) {
 174
 175                                                 int index2 = reqUrl.IndexOf(".aspx");
 176                                                 if ((index2 > 0) && (index2 + ".aspx".Length < reqUrl.Length))
 177                                                         Session["InitialReqUrl"] = reqUrl.Substring(0, index2 + ".aspx".Length);
 178                                                 else
 179                                                         Session["InitialReqUrl"] = reqUrl;
 180                                         }
 181
 182                                         queryStringProcessed = true;
 183
 184                                         Search_Click(o, e);
 185
 186                                         //Redirect client to initial Beagle webaccess URL:
 187                                 Response.Redirect((string)Session["InitialReqUrl"]);
 188                                 }
 189                         }  //end else for if (actionString == null)
 190                 }  //end if (!IsPostBack)
 191
 192                 //Process Tile!Action HTTP-Get request, if user has clicked on one:
 193                 if (actionString != null && !queryStringProcessed) {
 194
 195                         WebBackEnd remoteObj = (WebBackEnd) Session["RemObj"];
 196
 197                         if (remoteObj != null) {
 198                                 if (isLocalReq())
 199                                 remoteObj.dispatchAction(sessId, actionString);
 200                         }
 201                         else {
 202                                         Output.Text = enableSessionMsg;
 203                                         Back.Visible = Forward.Visible = GlobalSearchCheckBox.Visible = false;
 204                                         return;
 205                         }
 206
 207                         //Redirect client to initial Beagle webaccess URL:
 208                         Response.Redirect((string)Session["InitialReqUrl"]);
 209                 }
 210         }
 211
 212         private bool isLocalReq() {
 213                 //tells whether request originated from local machine
 214                 return Request.Url.IsLoopback;
 215         }
 216
 217         private string convertUrls(string buf)
 218         {
 219           //Replace specific actions in URL's
 220           string buf1 = buf.Replace("href=\"action:", "href=\"" + Session["InitialReqUrl"] + "?action:");
 221           string buf2 = buf1.Replace("href=\"dynaction:", "href=\"" + Session["InitialReqUrl"] + "?dynaction:");
 222
 223           string initUrl = (string) Session["InitialReqUrl"];
 224
 225           //Get the initial part of url: i.e. http://localhost:8888/beagle
 226           int i = initUrl.LastIndexOf('/');
 227           string UrlPrefix = initUrl.Substring(0, i);
 228
 229           //Check if initial url was http://localhost:8888/search.aspx & add a trailing "/"
 230           if (UrlPrefix.EndsWith("beagle"))
 231                 UrlPrefix += "/";
 232           else
 233                 UrlPrefix += "/beagle/";
 234
 235           string[] list = buf2.Split('\"');
 236           for (int k = 0; k < list.Length; k++) {
 237
 238                         if (list[k].Length <= 0)
 239                                         continue;
 240
 241                         list[k] = list[k].Replace("file://" + ExternalStringsHack.KdePrefix, UrlPrefix + "kde3");
 242                         list[k] = list[k].Replace("file://" + ExternalStringsHack.GnomePrefix, UrlPrefix + "gnome");
 243                         list[k] = list[k].Replace("file://" + ExternalStringsHack.Prefix,       UrlPrefix + "local");
 244           }
 245
 246           string imgId = "0001";
 247           ArrayList prList = new ArrayList();
 248           const string ImgFilePrefix = "img src=\"file://";
 249
 250           list = (String.Join ("\"", list)).Split('<');
 251           for (int n = 0; n < list.Length; n++) {
 252
 253                         if (list[n].StartsWith(ImgFilePrefix))  {
 254
 255                                 string[] l = list[n].Split('\"');
 256                                 //l[1] now contains "file:///home/usr/folder/xyz.png"
 257                                 string path = l[1].Remove(0, 7); //remove "file://" prefix
 258                                 string[] l2 = path.Split('.');
 259                                 if (l2.Length < 2)
 260                                         continue;
 261
 262                                 string[] guid = (System.Guid.NewGuid().ToString()).Split('-');
 263                                 if (guid.Length > 1)
 264                                         imgId = guid[guid.Length - 1]; //last 12 chars of guid
 265
 266                                 string linkName = "i" + imgId + "." + l2[l2.Length - 1]; //like ixxxxxx.png, izzzzzz.jpg
 267
 268                                 try {
 269                                         Process pr = new Process ();
 270                                         pr.StartInfo.UseShellExecute = true;
 271                                         pr.StartInfo.FileName = "ln";
 272                                         pr.StartInfo.Arguments = " -sf " + path + " " + PathFinder.StorageDir  + "/img/" + linkName;
 273
 274                                         pr.Start ();
 275
 276                                         prList.Add(pr);
 277                                 }
 278                                 catch (Exception e)
 279                                 {
 280                                         Console.WriteLine("Error creating symbolic link for image file");
 281                                 }
 282
 283                                 //Replace l[1] with "http://localhost:8888/beagle/img/i1.png
 284                                 l[1] = UrlPrefix + "img/" + linkName;
 285                                 list[n] = String.Join ("\"", l);
 286                         }
 287           }
 288
 289           //Wait for link ops to complete
 290           if (prList.Count > 0)
 291                 foreach (Process pr in prList) {
 292                         pr.WaitForExit();
 293                         pr.Close();
 294                         pr.Dispose();
 295                 }
 296
 297           return String.Join ("<", list);
 298         }
 299
 300         protected void Search_Click(object o, EventArgs e) {
 301
 302                 //if (IsPostBack && Session.IsNewSession)
 303                 if (Session["InitialReqUrl"] == null) {
 304                         Output.Text = enableSessionMsg;
 305                         Back.Visible = Forward.Visible = GlobalSearchCheckBox.Visible = false;
 306                         return;
 307                 }
 308
 309                 if (SearchBox.Text.Trim() == "") {
 310                         Output.Text = HeaderMsg + NO_RESULTS;
 311                         Back.Visible = Forward.Visible = false;
 312
 313                         Session["SearchString"] = SearchBox.Text;
 314                         Session["ResultsOnDisplay"] = Output.Text;
 315                         Session["GlobalCheckBox"] = GlobalSearchCheckBox.Checked;
 316                         return;
 317                 }
 318
 319                 string searchSrc = sourceList.SelectedItem.Value;
 320                 if (searchSrc.Equals("Anywhere"))
 321                         searchSrc = null;
 322
 323                 remoteChannel.Register();
 324
 325                 WebBackEnd remoteObj = (WebBackEnd) Session["RemObj"];
 326                 if (remoteObj == null) {
 327                          remoteObj = new WebBackEnd();
 328                 }
 329
 330                 if ( (remoteObj == null) || !(remoteObj.allowGlobalAccess || isLocalReq())) {
 331
 332                         Output.Text = localReqOnlyMsg;
 333                         Back.Visible = Forward.Visible = GlobalSearchCheckBox.Visible = false;
 334                         sourceList.Enabled = SearchBox.Enabled = Search.Enabled = false;
 335                         return;
 336                 }
 337
 338                 if (!isLocalReq() && (((string)TitleLabel.Text).IndexOf("host") < 0))
 339                                 TitleLabel.Text += "  from host: " + remoteObj.HostName;
 340
 341                 //Show check-box only if we have one or more NetworkedBeagle nodes configured:
 342                 bool showGlobalCheckBox = (remoteObj.NetworkBeagleActive) && (searchSrc == null);
 343
 344                 //Setup arguments for WebBackEnd:doQuery()
 345                 webArgs wargs = new webArgs();
 346                 wargs.sessId = Session.SessionID;
 347                 wargs.searchString = SearchBox.Text;
 348                 wargs.searchSource = searchSrc;
 349                 wargs.isLocalReq = isLocalReq();
 350                 wargs.globalSearch = showGlobalCheckBox?GlobalSearchCheckBox.Checked:false;
 351
 352                 string response = "";
 353                 try {
 354                         response = remoteObj.doQuery(wargs);
 355                 }
 356                 catch (Exception ex)
 357                 {
 358                         response = "Exception in WebBackEnd:doQuery method\n";
 359                         Console.WriteLine("WebFrontEnd: Caught Exception in WebBackEnd:doQuery()\n" + ex.Message);
 360                 }
 361
 362                 if (response.StartsWith(NO_RESULTS))  {
 363                                 Output.Text = HeaderMsg + response;
 364                                 Back.Visible = Forward.Visible = false;
 365                 }
 366                 else {
 367                                 Output.Text = HeaderMsg + convertUrls(response);
 368                                 Back.Enabled = remoteObj.canBack(Session.SessionID);
 369                                 Forward.Enabled = remoteObj.canForward(Session.SessionID);
 370                 }
 371
 372                 GlobalSearchCheckBox.Visible = showGlobalCheckBox;
 373                 Session["GlobalCheckBox"] = GlobalSearchCheckBox.Checked;
 374                 Session["RemObj"] = remoteObj;
 375                 Session["ResultsOnDisplay"] = Output.Text;
 376                 Session["SearchString"] = SearchBox.Text;
 377                 Session["Source"] = searchSrc;
 378         }
 379
 380         protected void Back_Click(object o, EventArgs e) {
 381
 382                 WebBackEnd remoteObj = (WebBackEnd) Session["RemObj"];
 383                 //if (IsPostBack && HttpContext.Current.Session.IsNewSession)
 384                 if (remoteObj == null)  {
 385                         Output.Text = enableSessionMsg;
 386                         Back.Visible = Forward.Visible = GlobalSearchCheckBox.Visible = false;
 387                         return;
 388                 }
 389
 390                 if ( (remoteObj == null) || !(remoteObj.allowGlobalAccess || isLocalReq())) {
 391
 392                         Output.Text = localReqOnlyMsg;
 393                         Back.Visible = Forward.Visible = GlobalSearchCheckBox.Visible = false;
 394                         sourceList.Enabled = SearchBox.Enabled = Search.Enabled = false;
 395                         return;
 396                 }
 397
 398                 string sessId = Session.SessionID;
 399
 400                 SearchBox.Text = (string) Session["SearchString"];
 401                 sourceList.SelectedValue = (string) Session["Source"];
 402
 403                 //if (remoteObj == null)  { Output.Text = NO_RESULTS; return; }
 404
 405                 string response = "";
 406                 try {
 407                         response = convertUrls(remoteObj.doBack(sessId));
 408                 }
 409                 catch (Exception ex)
 410                 {
 411                         response = "Exception in WebBackEnd:doBack method\n";
 412                         Console.WriteLine("WebFrontEnd: Caught Exception in WebBackEnd:doBack()\n" + ex.Message);
 413                 }
 414
 415                 Session["ResultsOnDisplay"] = Output.Text = HeaderMsg + response;
 416
 417                 GlobalSearchCheckBox.Checked = (bool)Session["GlobalCheckBox"];
 418                 Back.Enabled = (remoteObj != null) && (remoteObj.canBack(sessId));
 419                 Forward.Enabled = (remoteObj != null) && (remoteObj.canForward(sessId));
 420         }
 421
 422         protected void Forward_Click(object o, EventArgs e) {
 423
 424                 WebBackEnd remoteObj = (WebBackEnd) Session["RemObj"];
 425                 //if (IsPostBack && HttpContext.Current.Session.IsNewSession)
 426                 if (remoteObj == null) {
 427                         Output.Text = enableSessionMsg;
 428                         Back.Visible = Forward.Visible = GlobalSearchCheckBox.Visible = false;
 429                         return;
 430                 }
 431
 432                 if ( (remoteObj == null) || !(remoteObj.allowGlobalAccess || isLocalReq())) {
 433
 434                         Output.Text = localReqOnlyMsg;
 435                         Back.Visible = Forward.Visible = GlobalSearchCheckBox.Visible = false;
 436                         sourceList.Enabled = SearchBox.Enabled = Search.Enabled = false;
 437                         return;
 438                 }
 439
 440                 string sessId = Session.SessionID;
 441                 SearchBox.Text = (string) Session["SearchString"];
 442                 sourceList.SelectedValue = (string) Session["Source"];
 443
 444                 //if (remoteObj == null)  { Output.Text = NO_RESULTS; return; }
 445                 string response = "";
 446                 try {
 447                         response = convertUrls(remoteObj.doForward(sessId));
 448                 }
 449                 catch (Exception ex)
 450                 {
 451                         response = "Exception in WebBackEnd:doForward method\n";
 452                         Console.WriteLine("WebFrontEnd: Caught Exception in WebBackEnd:doForward()\n" + ex.Message);
 453                 }
 454
 455                 Session["ResultsOnDisplay"] = Output.Text = HeaderMsg + response;
 456
 457                 GlobalSearchCheckBox.Checked = (bool)Session["GlobalCheckBox"];
 458                 Back.Enabled = (remoteObj != null) && (remoteObj.canBack(sessId));
 459                 Forward.Enabled = (remoteObj != null) && (remoteObj.canForward(sessId));
 460         }
 461    }
 462 }