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  • How can I securely check if a username is already taken?

    - by Geo
    I have a form where someone can create a new user. I'd like to add some AJAX to check if a username is taken, as soon as the input field loses focus. I'm not really sure how to go about this, as this could pave the way to bruteforce attack, since you could check for any username and see whether or not it exists. Any suggestions?

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  • Web-Cam Video frames to System.Drawing.Bitmap

    - by Hooch
    Hello. I'm using AForge.NET framework to process some data from webcam. My Image processor is working. class WebProc { public void Process(System.Drawing.Bitmap image) { .... } } I know how to send image from HDD. I was thinking about something like that: private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) { while(!backgroundWorker1.CancellationPending) { Bitmap Frame GetVidoFrameSomeWay(); WebProc.Process(Frame); } } Can you help me with those questions? How to get frame from webcam? How to list all available webcam for user to chose from? How to open Webcam setting window? Is there a way to set frame size to 640x480 o user size?

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  • Scrapy - Follow RSS links

    - by Tupak Goliam
    Hello, I was wondering if anyone ever tried to extract/follow RSS links using SgmlLinkExtractor/CrawlSpider. I can't get it to work... I am using the following rule: rules = ( Rule(SgmlLinkExtractor(tags=('link',), attrs=False), follow=True, callback='parse_article'), ) (having in mind that rss links are located in the link tag). I am not sure how to tell SgmlLinkExtractor to extract the text() of the link and not to search the attributes ... Any help is welcome, Thanks in advance

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  • Restoring web session in struts2

    - by bozo
    Hi, I have a classical scenario of a website and payment gateway integration, where the request for payment is sent to payment processor, and the payment processor calls back my application once it's done with some parameters I passed to it in the original request. Among parameters, we pass jsessionid and we expect that when the remote server makes request to our server (via customer browser redirect to our server) that the session will be the same as the session used to send the initial payment request. This does not happen, we have two different sessions, although the payment processor includes our original jsessionid in the request to us (https://blabla/?jsessionid=something). How should we go about recreating a session in struts2, in the only thing that connects the 'OLD' and 'NEW' session is the jsessionid in the request URL? Any ideas? Is this possible at all or is the 'OLD' session data deleted when the user moves away from our server onto a completely different domain of a payment processor with their data-entry form? This would explain our innability to recreate the session. Thanks a lot for your replies.

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  • linq: SQL performance on high loaded web applications

    - by Alex
    I started working with linq to SQL several weeks ago. I got really tired of working with SQL server directly through the SQL queries (sqldatareader, sqlcommand and all this good stuff).  After hearing about linq to SQL and mvc I quickly moved all my projects to these technologies. I expected linq to SQL work slower but it suprisongly turned out to be pretty fast, primarily because I always forgot to close my connections when using datareaders. Now I don't have to worry about it. But there's one problem that really bothers me. There's one page that's requested thousands of times a day. The system gets data in the beginning, works with it and updates it. Primarily the updates are ++ @ -- (increase and decrease values). I used to do it like this UPDATE table SET value=value+1 WHERE ID=@I'd It worked with no problems obviously. But with linq to SQL the data is taken in the beginning, moved to the class, changed and then saved. Stats.registeredusers++; Db.submitchanges(); Let's say there were 100 000 users. Linq will say "let it be 100 001" instead of "let it be increased by 1". But if there value of users has already been increased (that happens in my site all the time) then linq will be like oops, this value is already 100 001. Whatever I'll throw an exception" You can change this behavior so that it won't throw an exception but it still will not set the value to 100 002. Like I said, it happened with me all the time. The stas value was increased twice a second on average. I simply had to rewrite this chunk of code with classic ado net. So my question is how can you solve the problem with linq

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  • XML security in world wide web

    - by nikky
    Hi, Im a newbie in XML and i have some questions Can XML be used in stead of normal database (store data in a tuple and column) in website? XML is built to share information easier (from my understanding) such as can share cross platform and in different language used so Is it secure to store secure data in XML? thank you so much

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  • How to deploy a project developed in Tapestry5?

    - by shane87
    I have just completed a project as part of a college degree. However I would like to deploy the project and make it live. I am unsure of how to do this as I have never done it before? I know I need to buy a domain name and some server space to host the project. If anyone can point me in the right direction that would be great? Thanks in advance!

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  • EC2 persistence of machine

    - by Seagull
    I want to 'persist' my Amazon EC2 images. My scenario: I have a range of Windows and Linux machines Some machines are EBS backed, whereas others are S3 backed. I need to be able to persist a machine (put it to sleep), preferably keeping all settings active I had them when the machine was running. I need to be able to quickly wake up a machine from sleep [Ideally with an SLA of less than 2 min to turn-on, if such an SLA is available with Amazon]. Here's the stuff that confuses me: AWS allows me to put EBS backed machines to sleep, but not S3 backed. I believe I can put S3 machines into some sort of persistence mode. But this involves shutting down the machine, writing it to S3 storage and then recovering from there (not a real sleep mode, but at least I don't continue to get billed for CPU). S3 backing seems to take a long time to either writing a machine to disk, or to recover (turn on a machine). I can't tell immediately which machines are EBS backed and which are S3 backed? It seems like I can instantiate either type, but it's not immediately clear how Amazon decided whether a given machine should be EBS or S3 backed. Advice?

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  • frameworks to support RIA/Web 2.0 technologies

    - by kunkunur
    are there any frameworks that can help an application support all/most of the RIA technologies like ajax, flex, javafx, siverlight? essentially a framework and/or tools to help build an application that can support client-side UI components built using RIA technologies. How does GWT fair in this respect?

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  • Designing a service for consumption on multiple mobile platforms

    - by Nate Bross
    I am building and designing a (mostly) read-only interface to some data. I'll be uing ASP.NET MVC to build a psudo-restful API. I'm wondering if anyone can provide some resources for building full-client applications for various mobile platforms, iPhone, Android, Blackberry, Windows Mobile, etc. I'm thinking that serving up XML data is going to be the most simple and universal, but parsing XML in objective-C for example doesn't sound like fun to me, but maybe there are some good libaries out there to help ease this task? In other words, what formt will be the quickest to implement on the client side? Are there any JSON parsrs for iPhone or Android? I know there are .NET JSON parsers, but not sure about other platforms -- is ther another format that might better? Or should I stick with pure XML and deal with it on each platform differently?

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  • How to read SOAP response in FLEX 3

    - by Sam Rudolph
    SOAP Request<?xml version="1.0" encoding="UTF-8"?> <S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/"> <S:Header/> <S:Body> <ns2:deleteDataView xmlns:ns2="http://ws.$$$$$.@@@@@.####.com/"> <identifier>5</identifier> </ns2:deleteDataView> &lt;/S:Body&gt; </S:Envelope> SOAP Response<?xml version="1.0" encoding="UTF-8"?> <S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/"> <S:Body> <ns2:deleteDataViewResponse xmlns:ns2="http://ws.$$$$$.@@@@@.####.com/"> <return>ERROR: A bug has been encountered,please try later</return&gt </ns2:deleteDataViewResponse> </S:Body> </S:Envelope> I want to read SOAP response in flex,am some what new to FLEX,pls help,even good resources will work.

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  • Using Frameset with Treeviews in ASP.Net

    - by Ben
    Afternoon, I am trying have an HTML file containing a frameset which contains two frames. I have populated the left Frame with a URL containing a TreeView with URL's for the nodes. I would like the to be able to select a URL from the treeview in the left hand frame, and have it set the src of the right hand frame to be that URL. Is that possible? Thanks

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  • Integrate gmail in asp.net web application

    - by Zerotoinfinite
    Hi, I am using asp.net 3.5 with C#. I want to integrate gmail into my site, just like any widget so that, people can login there and can access their gmail account. Actually gmail is blocked in my organisation & I want to access it via proxy that I can integrate in my website. Thanks a billion.

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  • Using RDL files in Web ReportViewer

    - by user54064
    I want to use a rdl file with the query information stored in it. I don't want to have to convert it to a rdlc file. I have an ASP.NET app that I want to show the report. I thought I would use a ReportViewer on my page and then have it use the rdl file. However, I get an error and in researching it appears that I have to convert the file to an rdlc file. I don't want to strip out the data contained in the report. How can I show the report to the user by running the rdl report?

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  • JSON DATA formatting in WebAPI

    - by user1736299
    public class CalendarController : ApiController { Events[] events = new Events[] { new Events { title= "event1", start = System.DateTime.UtcNow, end = System.DateTime.UtcNow }, new Events { title= "event2", start = System.DateTime.UtcNow, end = System.DateTime.UtcNow }, new Events { title= "event3", start = System.DateTime.UtcNow, end = System.DateTime.UtcNow} }; public IEnumerable<Events> GetAllCalendar() { return events; } The JSON result for the above is [{ "title": "event1", "start": "2012-12-05T22:52:35.6471712Z", "end": "2012-12-05T22:52:35.6471712Z"}, { "title": "event2", "start": "2012-12-05T22:52:35.6471712Z", "end": "2012-12-05T22:52:35.6471712Z"}, { "title": "event3", "start": "2012-12-05T22:52:35.6471712Z", "end": "2012-12-05T22:52:35.6471712Z" }]? How to create the same JSON result without the double quotes but single quote. How to get the date in the format of ‘YYYY-MM-DD HH:MM:SS’ Thank you, Smith

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  • Automated download of website content using ASP.net

    - by Yaaqov
    Using ASP.net, what methods can I use to do the following: Open up a connection to a given URL to read HTML content Parse the given URL for hyperlinks, and place them in an array Loop through each hyperlink (only 1 level down), opening each one, saving the HTML contents in a table, and move to the next hyperlink until done. If ASP.net is not up to the task, other languages or free scripts/toolkits would be acceptable. Thanks.

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  • JQuery post not working when moving web-app to a win server 2003

    - by karl
    I have build a webapplication using ASP.NET MVC and JQuery. On my local machine this works fine,but when moving it to a Windows server 2003 the JQuery method post stops working. I'm also using the load method and this works fine. function methodOne(id) { alert("debug1: <%= Url.Action( "MethodOne", "controller" ) + "/" %>" + id); $.post <%= Url.Action( "MethodOne", "controller" ) + "/" %>" + id, function(data) { alert("debug2"); ... } else { alert("Debugg: Add presentation to user failed"); } }); } The debug2 is never outputed. $('#panel').load("<%= Url.Action( "Method", "Controller" ) %"); Works fine.

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  • ASP.NET Web Custom Controls

    - by Mohit Kumar
    Hello Experts, I am Beginner. I want to study and create custom controls. I have searched on Google but didn't find any good stuff. Could anybody provide me some nice link or explain me that how can I start custom controls. Thanks in advance.

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  • WSDL AXIS Arrays

    - by SKS
    I am trying to create wsdl definition for the below soap response, < reasonCode Required="TRUE" < ValidCodeRR< /ValidCode < ValidCodeRB< /ValidCode < ValidCodeRT< /ValidCode < ValidCodeAR< /ValidCode < /reasonCode Below is the wsdl definition I have, < xsd:complexType < xsd:sequence < xsd:element name="ValidCode" type="xsd:string" minOccurs="0" maxOccurs="20" / < /xsd:sequence < xsd:attribute name="Required" type="xsd:string" / < /xsd:complexType < /xsd:element I am using Axis 1 to generate the webservices client and for the above wsdl definition, the tool generates the reasonCode as a string array like below. private java.lang.String[] reasonCode It ignores the attribute required. Does anyone know how to write wsdl defintion, such that axis creates reasonCode as an element with an attribute "required". Any help on this would be greatly appreciated. Thanks, SK

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  • How to put 1000 lightweight server applications in the cloud

    - by Dan Bird
    The company I work for sells a commercial desktop/server app that runs on any non dedicated Windows PC or server and uses Tomcat for all interactions with the application. Customers are asking that we host their instance of the application so they don't have to run it locally on their own servers. The app is lightweight and an average server, in theory, could handle 25-50 instances before users would notice a slowdown. However only 1 instance can run per Windows instance (because the application writes to a common registry branch) so we'd need something like VMWare to create 25-50 Windows instances. We know we eventually need to reprogram to make it truly cloud-worthy but what would you recommend for a server farm or whatever for this? We don't have the setup to purchase our own servers so we must use a 3rd party. We have budgeted $500 - $1000 per year per customer for this service. Thanks in advance for your suggestions, experiences and guidance.

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  • Drawing a Web Graph

    - by Kenn
    I'm trying to draw a graph on an ASP webpage. I'm hoping an API can be helpful, but so far I have not been able to find one. The graph contains labeled nodes and unlabeled directional edges. The ideal output would be something like this. Anybody know of anything pre-built than can help?

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  • Blackberry app stuck trying to access a server.

    - by Tejaswi Yerukalapudi
    Hi, I've built a ASP.NET webservice and I'm trying to access it from a Blackberry. I've been testing it out with multiple devices and the simulator and it works fine, but there's just the one Blackberry 9000 (It's not the model, I've tried it out with another Blackberry 9000), and it's stuck waiting for a response from the server. Relevant section of the code that accesses this - System.out.println("IN ntwk access thread, start point"); HttpConnection connection = (HttpConnection)Connector.open(serviceURL + WSNAME); connection.setRequestMethod(HttpConnection.POST); connection.setRequestProperty("Content-type", "application/x-www-form-urlencoded"); connection.setRequestProperty("Content-length", Integer.toString(postData1.length)); OutputStream requestOutput = connection.openOutputStream(); requestOutput.write(postData1); requestOutput.close(); final int responseCode = connection.getResponseCode(); if(responseCode!= HttpConnection.HTTP_OK) { //Process the error condition } // Request succeeded process the data. It seems to be getting stuck after connection.getResponseCode(). Is there some way I can verify what's going wrong with this particular device? Thanks, Teja

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