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• input type file alternative and file upload best practice

  - by Ioxp

  Background: I am working on a file upload page that will extend an existing web portal. This page will allow for an end user to upload files from there local computer to our network (the files will not be stored on the web server, rather a remote workstation). The end user will have the ability to view the data that they have submitted by hyper-linking the files that have been uploaded on this page. Question 1: Is there an ASP.net alternative to the <input type="file" runat="server" /> HTML tag? The reason for asking is i would rather use an image button and display the file as an asp label on the portal to keep with a consistent style. Question 2: So i understand that giving the end user the ability to upload files to the server and then turn around to show them the data that they posted poses a security threat. So far i am using the id.PostedFile.ContentType and the file extension to reject the data if its not an accepted format (i.e. "text/plain", "application/pdf", "application/vnd.ms-excel", or "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"). Also the location where the files are uploaded to has a sufficient amount of virus and malware protection and this is not a concern. What, from the C# point of view, additional steps should i take to ensure that the end user cant take advantage and compromise the system in regards to allowing them to upload files?

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• Display a Photo Gallery using Asp.Net and SQL

  - by sweetcoder

  I have recently added photos to my SQL database and have displayed them on an *.aspx page using Asp:Image. The ImageUrl for this control stored in a separate *.aspx page. It works great for profile pictures. I have a new issue at hand. I need each user to be able to have their own photo gallery page. I want the photos to be stored in the sql database. Storing the photos is not difficult. The issue is displaying the photos. I want the photos to be stored in a thumbnail grid fashion, when the user clicks on the photo, it should bring up the photo on a separate page. What is the best way to do this. Obviously it is not to use Asp:Image. I am curious if I should use a Gridview. If so, how do I do that and should their be a thumbnail size stored in the database for this? Once the picture is click on how does the other page look so that it displays the correct image. I would think it is not correct to send the photoId through the url. Below is code from the page I use to display profile pictures. protected void Page_Load(object sender, EventArgs e) { string sql = "SELECT [ProfileImage] FROM [UserProfile] WHERE [UserId] = '" + User.Identity.Name.ToString() + "'"; string strCon = System.Web.Configuration.WebConfigurationManager.ConnectionStrings["SocialSiteConnectionString"].ConnectionString; SqlConnection conn = new SqlConnection(strCon); SqlCommand comm = new SqlCommand(sql, conn); conn.Open(); Response.ContentType = "image/jpeg"; Response.BinaryWrite((byte[])comm.ExecuteScalar()); conn.Close(); }

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• How countdown get Synchronise with jquery using "jquery.countdown.js" plugin?

  - by ricky roy

  unable to get the correct Ans as i am getting from the Jquery I am using jquery.countdown.js ref. site http://keith-wood.name/countdown.html here is my code [WebMethod] public static String GetTime() { DateTime dt = new DateTime(); dt = Convert.ToDateTime("April 9, 2010 22:38:10"); return dt.ToString("dddd, dd MMMM yyyy HH:mm:ss"); } html file <script type="text/javascript" src="Scripts/jquery-1.3.2.js"></script> <script type="text/javascript" src="Scripts/jquery.countdown.js"></script> <script type="text/javascript"> $(function() { var shortly = new Date('April 9, 2010 22:38:10'); var newTime = new Date('April 9, 2010 22:38:10'); //for loop divid /// $('#defaultCountdown').countdown({ until: shortly, onExpiry: liftOff, onTick: watchCountdown, serverSync: serverTime }); $('#div1').countdown({ until: newTime }); }); function serverTime() { var time = null; $.ajax({ type: "POST", //Page Name (in which the method should be called) and method name url: "Default.aspx/GetTime", // If you want to pass parameter or data to server side function you can try line contentType: "application/json; charset=utf-8", dataType: "json", data: "{}", async: false, //else If you don't want to pass any value to server side function leave the data to blank line below //data: "{}", success: function(msg) { //Got the response from server and render to the client time = new Date(msg.d); alert(time); }, error: function(msg) { time = new Date(); alert('1'); } }); return time; } function watchCountdown() { } function liftOff() { } </script>

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• Response.TransmitFile problem

  - by geoff

  I have the following code delivering a file to users when they click on a download link. For security purposes I can't just link directly to the file so this was set up to decode the url and transmit the file. It has been working fine for a while but recently I started having problems where the file will start downloading but there's no indication of how large the file is. Because of this when the download should stop, it doesn't. The file is about 99mb but when I download it, the browser just keeps downloading way beyond 100mb. I don't know what it's downloading but if I don't cancel it, it doesn't stop. So, my question is, is there either an alternative to transmitfile or a way to make sure the size of the file is sent also so that it stops at the right time? I don't want to use writefile because I don't want to load the entire file into memory since it's so large. Thanks. Here is the code: string filename = Path.GetFileName(url); context.Response.Buffer = true; context.Response.Charset = ""; context.Response.Cache.SetCacheability(HttpCacheability.NoCache); context.Response.ContentType = "application/x-rar-compressed"; context.Response.AddHeader("content-disposition", "attachment;filename=" + filename); context.Response.TransmitFile(context.Server.MapPath(url)); context.Response.Flush();

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• Problem with Json Date format when calling cross-domain proxy

  - by Christo Fur

  I am using a proxy service to allow my client side javascript to talk to a service on another domain The proxy is a simple ashx file with simply gets the request and forwards it onto the service on the other domain : using (var sr = new System.IO.StreamReader(context.Request.InputStream)) { requestData = sr.ReadToEnd(); } string data = HttpUtility.UrlDecode(requestData); using (var client = new WebClient()) { client.BaseAddress = serviceUrl; client.Headers.Add("Content-Type", "application/json"); response = client.UploadString(new Uri(webserviceUrl), data); } The client javascript calling this proxy looks like this function TestMethod() { $.ajax({ type: "POST", url: "/custommodules/configuratorproxyservice.ashx?m=TestMethod", contentType: "application/json; charset=utf-8", data: JSON.parse('{"testObj":{"Name":"jo","Ref":"jones","LastModified":"\/Date(-62135596800000+0000)\/"}}'), dataType: "json", success: AjaxSucceeded, error: AjaxFailed }); function AjaxSucceeded(result) { alert(result); } function AjaxFailed(result) { alert(result.status + ' - ' + result.statusText); } } This works fine until I have to pass a date. At which point I get a Bad Request error when the proxy tries to call the service I did have this working at one point but have now lost it. Have tried using JSON.Parse on the object before sending. and JSON.Stringify, but no joy anyone got any ideas what I am missing

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• Asp.net mvc json

  - by user310657

  Hi, I am working on a mvc project, and having problem with json. i have created a demo project with list of colors public JsonResult GetResult() { List strList = new List(); strList.Add("white"); strList.Add("blue"); strList.Add("black"); strList.Add("red"); strList.Add("orange"); strList.Add("green"); return this.Json(strList); } i am able to get these on my page, but when i try to delete one color, that is when i send the following using jquery function deleteItem(item) { $.ajax({ type: "POST", url: "/Home/Delete/white", data: "{}", contentType: "application/json; charset=utf-8", success: ajaxCallSucceed, dataType: "json", failure: ajaxCallFailed }); } the controler action public JsonResult Delete(string Color) {} Color always returns null, even if i have specified "/Home/Delete/white" in the url. i know i am doing something wrong or missing something, but not able to find out what. please can any one guide me in the right direction.

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• Asp.net MVC jQuery Ajax calls to JsonResult return no data

  - by Maslow

  I have this script loaded on a page: (function() { window.alert('bookmarklet started'); function AjaxSuccess(data, textStatus, xmlHttpRequest) { if (typeof (data) == 'undefined') { return alert('Data is undefined'); } alert('ajax success' + (data || ': no data')); } function AjaxError(xmlHttpRequest, textStatus, errorThrown) { alert('ajax failure:' + textStatus); } /*imaginarydevelopment.com/Sfc*/ var destination = { url: 'http://localhost:3041/Bookmarklet/SaveHtml', type: 'POST', success: AjaxSuccess, error: AjaxError, dataType: 'text',contentType: 'application/x-www-form-urlencoded' }; if (typeof (jQuery) == 'undefined') { return alert('jQuery not defined'); } if (typeof ($jq) == 'undefined') { if (typeof ($) != 'undefined') { $jq = $; } else { return alert('$jq->jquerify not defined'); } } if ($jq('body').length <= 0) { return alert('Could not query body length'); } if ($jq('head title:contains(BookmarkletTest)').length > 0) { alert('doing test'); destination.data = { data: 'BookmarkletTestAjax' }; $jq.ajax(destination); return; } })(); when it is run locally in VS2008's cassini the ajax success shows the returned string from Asp.net MVC, when it is run remotely the ajax success data is null. Here's the controller method that is firing both locally and when run remotely: [AcceptVerbs(HttpVerbs.Post | HttpVerbs.Get)] public string SaveHtml(string data) { var path = getPath(Server.MapPath); System.IO.File.WriteAllText(path,data); Console.WriteLine("SaveHtml called"); Debug.WriteLine("SaveHtml called"); //return Json(new { result = "SaveHtml Success" }); return "SaveHtml Success"; } Once i have it working I was going to remove the GET, but currently accessing the SaveHtml method directly from the webbrowser produces the expected results when testing. So there's something wrong in my javascript I believe, because when I step through there with chrome's developer tools, I see the data is null, and the xmlHttpRequest doesn't appear to have the expected result in it anywhere either. I'm loading jquery via http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js

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• c# asp.net How to return a usercontrol from a handeler ashx?

  - by Justin808

  I want to return the HTML output of the control from a handler. My code looks like this: <%@ WebHandler Language="C#" Class="PopupCalendar" % using System; using System.IO; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public class PopupCalendar : IHttpHandler { public void ProcessRequest (HttpContext context) { context.Response.ContentType = "text/plain"; System.Web.UI.Page page = new System.Web.UI.Page(); UserControl ctrl = (UserControl)page.LoadControl("~/Controls/CalendarMonthView.ascx"); page.Form.Controls.Add(ctrl); StringWriter stringWriter = new StringWriter(); HtmlTextWriter tw = new HtmlTextWriter(stringWriter); ctrl.RenderControl(tw); context.Response.Write(stringWriter.ToString()); } public bool IsReusable { get { return false; } } } I'm getting the error: Server Error in '/CMS' Application. Object reference not set to an instance of an object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object. Source Error: Line 14: System.Web.UI.Page page = new System.Web.UI.Page(); Line 15: UserControl ctrl = (UserControl)page.LoadControl("~/Controls/CalendarMonthView.ascx"); Line 16: page.Form.Controls.Add(ctrl); Line 17: Line 18: StringWriter stringWriter = new StringWriter(); How can I return the output of a Usercontrol via a handler?

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• Try/Catch with jquery ajax request

  - by Anthony

  I am trying to build a Google Chrome extension that makes an ajax request. Something similar to the GMail Checker extension. The problem is that when I do the request using jquery, and I put in the wrong username/password, it fails silently, with the error callback function ignored. If I move the ajax call out of the background.html script (where I can't see the requests in the developer window), to the options.html script, I get a dialog box to re-authenticate. If I hit cancel, THEN the jquery error callback fires. But in the original model extension (again, the Gmail checker), they use plain (non-jquery) ajax calls with a try/catch, and if I put in the wrong credentials, I get an alert saying as much. I tried wrapping the entire jquery call in a try/catch, like so: try { $.ajax({ type: "POST", url: someurl, contentType : "text/xml", data: somedata, username: user, password: pass, success: function(data,status,xhr){ alert("Hurrah!"); }, error: function(xhr, status, error){ alert("Error!" + xhr.status); }, dataType: "xml" }); } catch(e) { alert("You messed something up!"); } But still nothing. Is the error due to it being asynchronous, or is Chrome not returning the request as an error since it wants to re-prompt for credentials? Or do I just not know how to use try/catch? Update Here is a very slimmed down version of how the model code does the request: var req = new XMLHttpRequest(); req.onreadystatechange = function() { try { if ( req.readyState == 4 ) { //Do some stuff with results } } catch (ex) { alert('Error parsing response.'); } } try { req.send (data); } catch (ex) { alert ('Something went wrong with the request.'); }

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• HttpRequest.BeginWebRequest not executing asynchronously

  - by Shawn Simon

  I have the following code: Private Function CreateRequest() As HttpWebRequest Dim request As HttpWebRequest = HttpWebRequest.Create(_url) request.Method = "POST" request.ContentType = "application/x-www-form-urlencoded" Dim postData As String = String.Join("&", GetPostData().Select(Function(s) String.Format("{0}={1}", s.Key, HttpUtility.UrlEncode(s.Value))).ToArray) Dim data As Byte() = (New ASCIIEncoding).GetBytes(postData) request.Timeout = _maxTimeoutSeconds * 1000 Dim stream = request.GetRequestStream stream.Write(data, 0, data.Length) stream.Close() Return request End Function Public Sub SendAsync(ByVal callback As Action(Of ResponseBase)) Dim request = CreateRequest() _attemptCount += 1 Dim reqID As Integer If _loggingContext IsNot Nothing Then Try reqID = Log.NotesRequest(_url.ToString, GetPostData, _loggingContext) Catch ex As Exception ErrorTracker.LogError(ex) End Try End If Dim responseState As New ResponseState responseState.LoggedNotesRequestID = reqID responseState.Request = request responseState.Callback = callback Dim response = request.BeginGetResponse(New AsyncCallback(AddressOf RespCallback), responseState) End Sub Private Sub RespCallback(ByVal ar As IAsyncResult) Dim responseState As ResponseState = CType(ar.AsyncState, ResponseState) ' Process response... I set up the request to go to a mock server which sleeps for 30 seconds. When I call BeginGetResponse, the application just waits at that line of code for the response. I want it to carry on with the app, and then just run the callback whenever it finishes. This code is run from a web page, and my callback just logs the response and sends an email. I don't want to use to have to wait for the response.

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• image/jpeg returned by groovy/grails is OK on development system, but corrupt on prod system. What c

  - by ?????

  I have a groovy/grails application that needs to serve images It works fine on my dev box, the image is returned properly. Here's the start of the returned JPEG, as seen by od -cx 0000000 377 330 377 340 \0 020 J F I F \0 001 001 001 001 , d8ff e0ff 1000 464a 4649 0100 0101 2c01 but on the production box, there's some garbage in front, and the d8ff e0ff before the 1000 is missing 0000000 ? ** ** ? ** ** ? ** ** ? ** ** \0 020 J F bfef efbd bdbf bfef efbd bdbf 1000 464a 0000020 I F \0 001 001 001 \0 H \0 H \0 \0 ? ** ** ? 4649 0100 0101 4800 4800 0000 bfef efbd It's the exact same code. I just moved the .war over and run it on a different machine. (Isn't Java supposed to be write once, run everywhere?) Any ideas? An "encoding" problem? The code is sent to the response like this: response.contentType = "image/jpeg"; response.outputStream << out;

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• File Upload with HttpWebRequest doesn't post the file

  - by Sri Kumar

  Hello All, Here is my code to post the file. I use asp fileupload control to get the file stream. HttpWebRequest requestToSender = (HttpWebRequest)WebRequest.Create("http://localhost:2518/Web/CrossPage.aspx"); requestToSender.Method = "POST"; requestToSender.ContentType = "multipart/form-data"; requestToSender.KeepAlive = true; requestToSender.Credentials = System.Net.CredentialCache.DefaultCredentials; requestToSender.ContentLength = BtnUpload.PostedFile.ContentLength; BinaryReader binaryReader = new BinaryReader(BtnUpload.PostedFile.InputStream); byte[] binData = binaryReader.ReadBytes(BtnUpload.PostedFile.ContentLength); Stream requestStream = requestToSender.GetRequestStream(); requestStream.Write(binData, 0, binData.Length); requestStream.Close(); HttpWebResponse responseFromSender = (HttpWebResponse)requestToSender.GetResponse(); string fromSender = string.Empty; using (StreamReader responseReader = new StreamReader(responseFromSender.GetResponseStream())) { fromSender = responseReader.ReadToEnd(); } XMLString.Text = fromSender; In the page load of CrossPage.aspx i have the following code NameValueCollection postPageCollection = Request.Form; foreach (string name in postPageCollection.AllKeys) { Response.Write(name + " " + postPageCollection[name]); } HttpFileCollection postCollection = Request.Files; foreach (string name in postCollection.AllKeys) { HttpPostedFile aFile = postCollection[name]; aFile.SaveAs(Server.MapPath(".") + "/" + Path.GetFileName(aFile.FileName)); } string strxml = "sample"; Response.Clear(); Response.Write(strxml); I don't get the file in Request.Files. The byte array is created. What was wrong with my HttpWebRequest?

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• Will HttpResponse.Filter buffer the whole data before start the sending?

  - by vtortola

  Hi, An user posts this article about how to use HttpResponse.Filter to compress large amounts of data. But what will happen if I try to transfer a 4G file? will it load the whole file in memory in order to compress it? or otherwise it will compress it chunk by chunk? I mean, I'm doing this right now: public void GetFile(HttpResponse response) { String fileName = "example.iso"; response.ClearHeaders(); response.ClearContent(); response.ContentType = "application/octet-stream"; response.AppendHeader("Content-Disposition", "attachment; filename=" + fileName); response.AppendHeader("Content-Length", new FileInfo(fileName).Length.ToString()); using (FileStream fs = new FileStream(Path.Combine(HttpContext.Current.Server.MapPath("~/App_Data"), fileName), FileMode.Open)) using (DeflateStream ds = new DeflateStream(fs,CompressionMode.Compress)) { Byte[] buffer = new Byte[4096]; Int32 readed = 0; while ((readed = ds.Read(buffer, 0, buffer.Length)) > 0) { response.OutputStream.Write(buffer, 0, readed); response.Flush(); } } } So at the same time I'm reading, I'm compressing and sending it. Then I wanna know if HttpResponse do the same thing, or otherwise it will load the whole file in memory in order to compress it. Cheers.

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• jquery Ajax call resulting in Undefined Error in Firefox

  - by Kamal

  Hi I've been pulling my hair out for the last few hours with this problem. And the googling has been hampered by the very vagueness of this. So let me apologise for that first. Basically I'm using jquery and ajax (with C#) to return data from the backend and display that to the screen. The code works perfectly for firefox and IE. But when the data gets too large (??) (1500+ table rows) all I get is an undefined popup. Debugging in firefox (3.6) it doesn't even go into the success method. Worse still it doesn't even go into the error method. A lot of superfluous information there, but I'd rather show everything I'm doing. The Code $j.ajax( { type: "POST", url: "AdminDetails.aspx/LoadCallDetails", data: "{" + data + "}", contentType: "application/json;charset=utf-8", dataType: "json", success: function(msg) { $j("#CallDetailsHolder").html(msg.d); $j(".pointingHand").hide(); var oTable = $j('#dt').dataTable({ "bProcessing": true, "bPaginate": true, "bSort": true, "bAutoWidth": false, "aoColumns": [ { "sType": 'html' }, { "sType": 'custdate' }, { "sType": 'html-numeric' }, { "sType": 'ariary' }, { "sType": 'html' }, { "sType": 'html' } ], "oLanguage": { "sProcessing": "Traitement...", "sLengthMenu": "_MENU_ Montrer", "sZeroRecords": "Aucun enregistrement", "sInfo": "_START_ à _END_ de _TOTAL_", "sInfoEmpty": "0 à 0 de 0", "sInfoFiltered": "(filtrée à partir de _MAX_ )", "sInfoPostFix": "", "sSearch": "Rechercher", "sUrl": "", "oPaginate": { "sFirst": "premier", "sPrevious": "Précédent", "sNext": "suivant", "sLast": "dernier" } }, "sDom": 'T<"clear">lfrtip' }); $j('#CompteBlocRight0').unblock(); $j('#btnRangeSearch').click(function() { oTable.fnDraw(); }); }, error: function(msg) { DisplayError(msg); $j('#CompteBlocRight0').unblock(); } }); //$.ajax } The code definitely works. And even displays in IE without any issues. Any help???

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• Get variables in c# from ajax call

  - by fzshah76

  I've got an Ajax call for log in here is the code: //if MOUSE class is clicked $('.mouse').click(function () { //get the form to submit and return a message //how to call the function var name = $('#name').val(); var pwd2 = $('#pwd2').val(); $.ajax({ type:"POST", url: "http://localhost:51870/code/Login.aspx", data: "{ 'name':'" + $('#name').val() + "', 'pwd':'" + $('#pwd2').val() + "' }", contentType: "application/json; charset=utf-8", dataType: "json", context: document.body, success: function () { //$(this).addClass("done"); $(this).hide(); $('.mouse, .window').hide(); } }); }); the problem is I can't seem to catch name and pwd variables in Login page's preinit event or page load event here is the code in c#: protected void Page_PreInit(object sender, EventArgs e) { //taking javascript argument in preinit event //from here I'll have to build the page for specific lookbook var name = Request.QueryString["name"]; var pwd = Request.QueryString["pwd"]; } protected void Page_Load(object sender, EventArgs e) { var name = Request.QueryString["name"]; var pwd = Request.QueryString["pwd"]; SignIn(name); } I can't seem to get username name and password in c# side, help is appreciated. Here is my final javascript code c# code remains the same: <script type="text/javascript"> $(document).ready(function () { //if MOUSE class is clicked $('.mouse').click(function () { var name = $('#name').val(); var pwd = $('#pwd').val(); $.ajax({ url: "http://localhost:51870/code/Login.aspx?name="+ name +"&pwd="+pwd, context: document.body, success: function () { //$(this).addClass("done"); $(this).hide(); $('.mouse, .window').hide(); } }); }); }); </script> Thanks Zachary

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• Indy IdSMTP and attachments in Thunderbird

  - by Lobuno

  Hello! Using the latest snapshot of Indy tiburon on D2010. A very simple project like: var stream: TFileStream; (s is TidSMTP and m is TidMessage) begin s.Connect; Stream := TFileStream.Create('c:\Test.zip', fmOpenRead or fmShareExclusive); try with TIdAttachmentMemory.Create(m.MessageParts, Stream) do begin ContentType := 'application/x-zip-compressed'; Name := ExtractFilePath('C:\'); //' FileName := 'Test.zip'; end; finally FreeAndNil(Stream); end; s.Send(m); s.Disconnect(); end; Everything works Ok in Outlook, The bat!, OE, yahoo, etc... but in Thunderbird the attachment is not shown. Looking at the source of the message in Thunderbird, the attachment is there. The only difference I can find between messages send by indy and other clients is that Indy messages have this order: Content-Type: multipart/mixed; boundary="Z\=_7oeC98yIhktvxiwiDTVyhv9R9gwkwT1" MIME-Version: 1.0 while any other clients have the order: MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="Z\=_7oeC98yIhktvxiwiDTVyhv9R9gwkwT1" Don't know if THAT is the source of the problem, but if so: is this a bug on Thunderbird or is this a problem with indy which "malforms" the headers of the messages? Is this order a problem? Does that matter anyway?

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• Response.TransmitFile and delete it after transmission

  - by Radhi

  Hi, i have to implement GEDCOM export in my site. my .net code created one file at server when export to gedcom clicked. then i need to download it to client from server as well as user should be asked to where to save that file means savedialog is required. after its downloaded. i want to delete that file from server. i got one code to transmit file from server to client Response.ContentType = "text/xml"; Response.AppendHeader("Content-Disposition", "attachment; filename=" + FileName); Response.TransmitFile(Server.MapPath("~/" + FileName)); Response.End(); from this LINK but i am not able to delete the file after this code as Response.End ends response so whtever code written after that line is not execute. if i do code to delete file before Response.End(); then file does not transmitted and got error. so, please can anybody provide me any solution for this. -Thanks in advance

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• Please help! request compression

  - by Naor

  Hi, I wrote an IHttpModule that compress my respone using gzip (I return a lot of data) in order to reduce response size. It is working great as long as the web service doesn't throws an exception. In case exception is thrown, the exception gzipped but the Content-encoding header is disappear and the client doesn't know to read the exception. How can I solve this? Why the header is missing? I need to get the exception in the client. Here is the module: public class JsonCompressionModule : IHttpModule { public JsonCompressionModule() { } public void Dispose() { } public void Init(HttpApplication app) { app.BeginRequest += new EventHandler(Compress); } private void Compress(object sender, EventArgs e) { HttpApplication app = (HttpApplication)sender; HttpRequest request = app.Request; HttpResponse response = app.Response; try { //Ajax Web Service request is always starts with application/json if (request.ContentType.ToLower(CultureInfo.InvariantCulture).StartsWith("application/json")) { //User may be using an older version of IE which does not support compression, so skip those if (!((request.Browser.IsBrowser("IE")) && (request.Browser.MajorVersion <= 6))) { string acceptEncoding = request.Headers["Accept-Encoding"]; if (!string.IsNullOrEmpty(acceptEncoding)) { acceptEncoding = acceptEncoding.ToLower(CultureInfo.InvariantCulture); if (acceptEncoding.Contains("gzip")) { response.AddHeader("Content-encoding", "gzip"); response.Filter = new GZipStream(response.Filter, CompressionMode.Compress); } else if (acceptEncoding.Contains("deflate")) { response.AddHeader("Content-encoding", "deflate"); response.Filter = new DeflateStream(response.Filter, CompressionMode.Compress); } } } } } catch (Exception ex) { int i = 4; } } } Here is the web service: [WebMethod] public void DoSomething() { throw new Exception("This message get currupted on the client because the client doesn't know it gzipped."); } I appriciate any help. Thanks!

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• Having problem with jQuery Countdown? Function serverSync: serverTime

  - by ricky roy

  serverSync: serverTime Function return value from server but I have checked both server and client time both are same.When i called server to sync with server it will not display countdown. help me ? $(function() { var shortly = new Date(); var newTime = new Date('April 9, 2010 20:38:10'); //for loop divid /// $('#defaultCountdown').countdown({ until: shortly, onExpiry: liftOff, onTick: watchCountdown, serverSync: serverTime }); $('#div1').countdown({ until: newTime }); }); function serverTime() { var time = null; $.ajax({ type: "POST", //Page Name (in which the method should be called) and method name url: "Default.aspx/GetTime", // If you want to pass parameter or data to server side function you can try line contentType: "application/json; charset=utf-8", dataType: "json", data: "{}", async: false, //else If you don't want to pass any value to server side function leave the data to blank line below //data: "{}", success: function(msg) { //Got the response from server and render to the client time = new Date(msg.d); alert(time); }, error: function(msg) { time = new Date(); alert('1'); } }); shortly = time; return time; }

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• ThreadAbortException (WebClient using DownloadFile to grab file from server)

  - by baron

  Hi Everyone, Referencing my Earlier Question, regarding downloading a file from a server and handling exceptions properly. I am positive that I had this solved, then in classic programming fashion, returned days later to frustratingly find it broken :-( Updated code: private static void GoGetIt(HttpContext context) { var directoryInfoOfWhereTheDirectoryFullOfFilesShouldBe = new FileInfo(......); var name = SomeBasicLogicToDecideName(); //if (!directoryInfoOfWhereTheDirectoryFullOfFilesShouldBe.RefreshExists()) //{ // throw new Exception(string.Format("Could not find {0}.", name)); //} var tempDirectory = ""; //Omitted - creates temporary directory try { directoryInfoOfWhereTheDirectoryFullOfFilesShouldBe.CopyAll(tempDirectory); var response = context.Response; response.ContentType = "binary/octet-stream"; response.AddHeader("Content-Disposition", string.Format("attachment;filename={0}.zip", name)); ZipHelper.ZipDirectoryToStream(tempDirectory, response.OutputStream); response.End(); } catch (Exception ex) { Debug.WriteLine(ex.ToString()); context.Response.StatusCode = 404; } finally { tempDirectory.DeleteWithPrejudice(); } } This was working fine, and returning the zip, otherwise if the file didn't exist returning 404. Then on the client side I could handle this: public bool Download() { try { using (var client = new WebClient()) { client.DownloadFile(name, tempFilePath); } } catch (Exception) { fileExists = false; } return fileExists; } But the problem now is two things. 1) I get System.Threading.ThreadAbortException: Thread was being aborted in the server side try-catch block. Usually this was just a file not found exception. I have no idea what or why that new exception is throwing? 2) Now that a different exception is throwing on the server side instead of the file not found, it would seem I can't use this set up for the application, because back on client side, any exception is assumed to be filenotfound. Any help, especially info on why this ThreadAbortException is throwing!?!? greatly appreciated. Cheers

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• Getting Indy Error "Could not bind socket. Address and port are already in use"

  - by M Schenkel

  I have developed a Delphi web server application (TWebModule). It runs as a ISAPI DLL on Apache under Windows. The application in turn makes frequent https calls to other web sites using the Indy TIdHTTP component. Periodically I get this error when using the TIdHTTP.get method: Could not bind socket. Address and port are already in use Here is the code: IdSSLIOHandlerSocket1 := TIdSSLIOHandlerSocketOpenSSL.create(nil); IdHTTP := TIdHTTP.create(nil); idhttp.handleredirects := True; idhttp.OnRedirect := DoRedirect; with IdSSLIOHandlerSocket1 do begin SSLOptions.Method := sslvSSLv3; SSLOptions.Mode := sslmUnassigned; SSLOptions.VerifyMode := []; SSLOptions.VerifyDepth := 2; end; with IdHTTP do begin IOHandler := IdSSLIOHandlerSocket1; ProxyParams.BasicAuthentication := False; Request.UserAgent := 'Test Google Analytics Interface'; Request.ContentType := 'text/html'; request.connection := 'keep-alive'; Request.Accept := 'text/html, */*'; end; try idhttp.get('http://www.mysite.com......'); except ....... end; IdHTTP.free; IdSSLIOHandlerSocket1.free; I have read about the reusesocket method, which can be set on both the TIdHttp and TIdSSLLIOHandlerSocketOpenSSL objects. Will setting this to rsTrue solve my problems? I ask because I have not been able to replicate this error, it just happens periodically. Other considerations: I know multiple instances of TWebModule are being spawned. Would wrapping all calls to TIdHttp.get within a TCriticalSection solve the problem?

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• Export the datagrid data to text in asp.net

  - by SRIRAM

  Problem:It will asks there is no assembly reference/namespace for Database Database db = DatabaseFactory.CreateDatabase(); DBCommandWrapper selectCommandWrapper = db.GetStoredProcCommandWrapper("sp_GetLatestArticles"); DataSet ds = db.ExecuteDataSet(selectCommandWrapper); StringBuilder str = new StringBuilder(); for(int i=0;i<=ds.Tables[0].Rows.Count - 1; i++) { for(int j=0;j<=ds.Tables[0].Columns.Count - 1; j++) { str.Append(ds.Tables[0].Rows[i][j].ToString()); } str.Append("<BR>"); } Response.Clear(); Response.AddHeader("content-disposition", "attachment;filename=FileName.txt"); Response.Charset = ""; Response.Cache.SetCacheability(HttpCacheability.NoCache); Response.ContentType = "application/vnd.text"; System.IO.StringWriter stringWrite = new System.IO.StringWriter(); System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite); Response.Write(str.ToString()); Response.End();

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• Spring-json problem in Liferay with Spring 2.5

  - by Jesus Benito

  Hi all, I am trying to use the library spring-json.1.3.1 in a project that has been done with Liferay 5.1.2 which includes Spring 2.5. Following the project website instructions, I managed to make the request hit in my controller, but at the moment of returning the json object back through the modelAndView object it fails with the following error: java.lang.IllegalArgumentException at com.liferay.portlet.MimeResponseImpl.setContentType(MimeResponseImpl.java:162) I have checked Liferays source code, and it checks that contentType that its being set is in a harcoded list,if it not it will throw a IllegalArgumentException that it is exactly what os happening. This is my view resolver code: <bean id="xmlFileViewResolver" class="org.springframework.web.servlet.view.XmlViewResolver"> /WEB-INF/context/views.xml 1 My views.xml code: <beans> <bean name="jsonView" class="org.springframework.web.servlet.view.json.JsonView"/> And my controller: @SuppressWarnings("unchecked") @Override public ModelAndView handleRenderRequest(RenderRequest arg0, RenderResponse arg1) throws Exception { Map model = new HashMap(); model.put("firstname", "Peter"); model.put("secondname", "Schmitt"); return new ModelAndView("jsonView", model); } Any ideas?

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• how to download a file from remote server using asp.net

  - by ush

  The below code works fine for downloading a file from a current pc.plz suggest me how to download it from remote server using ip address or any method protected void Button1_Click(object sender, EventArgs e) { const string fName = @"C:\ITFSPDFbills\February\AA.pdf"; FileInfo fi = new FileInfo(fName); long sz = fi.Length; Response.ClearContent(); Response.ContentType = MimeType(Path.GetExtension(fName)); Response.AddHeader("Content-Disposition", string.Format("attachment; filename = {0}", System.IO.Path.GetFileName(fName))); Response.AddHeader("Content-Length", sz.ToString("F0")); Response.TransmitFile(fName); Response.End(); } public static string MimeType(string Extension) { string mime = "application/octetstream"; if (string.IsNullOrEmpty(Extension)) return mime; string ext = Extension.ToLower(); Microsoft.Win32.RegistryKey rk = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(ext); if (rk != null && rk.GetValue("Content Type") != null) mime = rk.GetValue("Content Type").ToString(); return mime; }

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• Best way to change jqGrid rowNum from ALL to -1 before pass to a web service

  - by Billyhole

  I'm looking to find the best way to allow users to choose to show ALL records in a jqGrid. I know that a -1 value passed for the rows parameter denotes ALL, but I want the word "ALL" not a -1 to appear in the rowList select element, ie. rowList: [15, 50, 100, 'ALL']. I'm passing the grid request to a web service which accepts an int for "rows", and I'm trying find how and when I should change the user selected value of "ALL" to a -1 before it gets sent to the web service. Below is my cleaned up grid code. I tried some various code blocks before my $.ajax in the datatype function. But most attempts just seemed like I have to be doing this the most convoluted way I possibly could. For example, datatype: function(postdata) { if ($("#gridTableAssets").jqGrid('getGridParam', 'rowNum') == 'ALL') { $("#gridTableAssets").appendPostData({ "rows": -1, "page": 1 }); } $.ajax({... But doing that seemed to cause the actual "page" GridParam to be nulled out on subsequent grid actions, forcing me handle that in other places. There just seems like this is something that would be frequently done out there and have clean way of doing it. Cleaned grid code: $("#gridTableAssets").jqGrid({ datatype: function(postdata) { $.ajax({ url: "/Service/Repository.asmx/GetAssets", data: JSON.stringify(postdata), type: 'POST', contentType: "application/json; charset=utf-8", error: function(XMLHttpRequest, textStatus, errorThrown) { alert('error'); }, success: function(msg) { var assetsGrid = $("#gridTableAssets")[0]; assetsGrid.addJSONData(JSON.parse(msg)); ... } }); }, ... pager: $('#pagerAssets'), rowNum: 15, rowList: [15, 50, 100, 'ALL'], ... onPaging: function(index, colindex, sortorder) { SessionKeepAlive(); } }); And here is the web service [WebMethod] public string GetAssetsOfAssetStructure(bool _search, int rows, int page, string sidx, string sord, string filters)

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