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  • Choosing approach for an IM client-server app

    - by John
    Update: totally re-wrote this to be more succint. I'm looking at a new application, one part of which will be very similar to standard IM clients, i.e text chat, ability to send attachments, maybe some real-time interaction like a multi-user whiteboard. It will be client-server, i.e all traffic goes through my central server. That means if I want to support cross-communication with other IM systems, I am still free to pick any protocol for my own client<--server communication - my server can use XMPP or whatever to talk to other systems. Clients are expected to include desktop apps, but probably also browser-based as well either through Flex/Silverlight or HTML/AJAX. I see 3 options for my own client-server communication layer: XMPP. The benefits are clients already exist as do open-source servers. However it requires the most up-front research/learning and also appears like it might raise legal issues due to GPL. Custom sockets. A server app makes connections with the clients, allowing any text/binary data to be sent very fast. However this approach requires building said server from scratch, and also makes a JS client tricky Servlets (or similar web server). Using tried and tested Java web-stack, clients send HTTP requests similar to AJAX-based websites. The benefit is the server is easy to write using well-established technologies, and easy to talk to. But what restrictions would this bring? Is it appropriate technology for real-time communication? Advice and suggests are welcome, especially what pros and cons surround using a web-server approach as compared to a socket-based approach.

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  • Make HTTP/1.1 request with PHP

    - by ejunker
    My code is using file_get_contents() to make GET requests to an API endpoint. It looks like it is using HTTP/1.0 and my sysadmin says I need to use HTTP/1.1. How can I make an HTTP/1.1 request? Do I need to use curl or is there a better/easier way?

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  • Help with HTTP Intercepting Proxy in Ruby?

    - by Philip
    I have the beginnings of an HTTP Intercepting Proxy written in Ruby: require 'socket' # Get sockets from stdlib server = TCPServer.open(8080) # Socket to listen on port 8080 loop { # Servers run forever Thread.start(server.accept) do |client| puts "** Got connection!" @output = "" @host = "" @port = 80 while line = client.gets line.chomp! if (line =~ /^(GET|CONNECT) .*(\.com|\.net):(.*) (HTTP\/1.1|HTTP\/1.0)$/) @port = $3 elsif (line =~ /^Host: (.*)$/ && @host == "") @host = $1 end print line + "\n" @output += line + "\n" # This *may* cause problems with not getting full requests, # but without this, the loop never returns. break if line == "" end if (@host != "") puts "** Got host! (#{@host}:#{@port})" out = TCPSocket.open(@host, @port) puts "** Got destination!" out.print(@output) while line = out.gets line.chomp! if (line =~ /^<proxyinfo>.*<\/proxyinfo>$/) # Logic is done here. end print line + "\n" client.print(line + "\n") end out.close end client.close end } This simple proxy that I made parses the destination out of the HTTP request, then reads the HTTP response and performs logic based on special HTML tags. The proxy works for the most part, but seems to have trouble dealing with binary data and HTTPS connections. How can I fix these problems?

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  • Parse metadata from http live stream

    - by supo
    Hi, I'd like to extract the info string from an internet radio streamed over HTTP. By info string I mean the short note about the currently played song, band name etc. Preferably I'd like to do it in python. So far I've tried opening a socket but from there I got a bunch of binary data that I could not parse... thanks for any hints

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  • Client side thumb creation OR Server side?

    - by Totty
    Hy, I have two options to choose from: Client side: pro: image manipulations occurs on the client side, so no load on the server cons: more uploaded data Server side: pro: less uploaded data cons: image manipulations occurs on the server side, so there are some load and will be queried... For example, when you upload an image, you will get 4 images: a large image, medium, thumb1, thumb2, so in the case of the client side will be needed to upload the 4 optimized images. For the server side, will be only uploaded 1 optimized image and then manipulated. What is better and less consuming way?

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  • Client timeout when using WCF through Spring.net

    - by Khash
    I'm using WCF through Spring.net WCF integration link text This works relatively fine, however it seems that WCF and Spring get in each other's way when instantiating client channels. This means that only a single client channel is created for a service and therefore the clients get a timeout after the configured timeout is expired since the same client channel has been open since it was instantiated by Spring. To make the matters worst, once a channel goes to a fault state, it affect all users of that service since spring doesn't create a new channel for each user. Has anyone managed to use WCF and Spring.net work together without these issues?

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  • GlassFish Starting Up Java SE Client - No Initial Context Exception

    - by Marcel
    Hi I have developed a java se client that calls some session beans on a glassfish server. I connect to the bean remote interface like this. context = new InitialContext(); em = (ICrudService) context.lookup("java:global/BackITServer/CrudServiceImpl"); This works fine from inside eclipse (gf-client on build path). When I export my project as a runnable jar and call it on the console with java -jar BackItClient.jar I get a NoInitialContextException. MMMM. I would very much appreciate some help. Thank You Greetings Marcel PS: Do I really have to pack all the jars which gf-client is referencing into my jar?

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  • How to display characters in http get response correctly with the right encoding

    - by DixieFlatline
    Hello! Does anyone know how to read c,š,ž characters in http get response properly? When i make my request in browser the browser displays all characters correctly. But in java program with apache jars i don't know how to set the encoding right. I tried with client.getParams().setParameter(CoreProtocolPNames.HTTP_CONTENT_CHARSET, "UTF-8"); but it's not working. My code: HttpClient client = new DefaultHttpClient(); String getURL = "http://www.google.com"; HttpGet get = new HttpGet(getURL); HttpResponse responseGet = client.execute(get); HttpEntity resEntityGet = responseGet.getEntity(); if (resEntityGet != null) { Log.i("GET RESPONSE",EntityUtils.toString(resEntityGet)); } } catch (Exception e) { e.printStackTrace(); }

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  • Wrangling Control of HTTP Headers in ASP.NET

    - by Andrew Burgess
    I'm working with ASP.NET MVC3, and I'm trying to get absolute control over my headers because a client application that I'm working with expects a very specific content type. What I'm finding when using Fiddler to examine the HTTP traffic is that the text encoding is being returned as part of the header. For example, the client is expecting application/appname in the Content-Type header, but the server is returning application/appname; charset=utf-8. I think the client is using a strict comparison for checking the type, so I want to be able to specify exactly what is emitted in the headers. Right now I have a custom ActionResult in which I clear the headers and then specify only the content type, but the encoding still seems to be added on. How can I remove the encoding from the Content-Type header?

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  • Java HTTP Client Request with defined timeout

    - by Maxim Veksler
    Hello, I would like to make BIT (Built in tests) to a number of server in my cloud. I need the request to fail on large timeout. How should I do this with java? Trying something like the below does not seem to work. public class TestNodeAliveness { public static NodeStatus nodeBIT(String elasticIP) throws ClientProtocolException, IOException { HttpClient client = new DefaultHttpClient(); client.getParams().setIntParameter("http.connection.timeout", 1); HttpUriRequest request = new HttpGet("http://192.168.20.43"); HttpResponse response = client.execute(request); System.out.println(response.toString()); return null; } public static void main(String[] args) throws ClientProtocolException, IOException { nodeBIT(""); } } -- EDIT: Clarify what library is being used -- I'm using httpclient from apache, here is the relevant pom.xml section org.apache.httpcomponents httpclient 4.0.1 jar

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  • How to create a persistent connection using AS3 Sockets for a chat client

    - by Vivek
    I want to create a chat client in flash/flex for a chat server,something like a MUD/MOO client but I'm unable to create a persistent connection . I've been using the AS3 Socket class,but I'm getting disconnected from the server side,soon after the connection is made but the client still shows the 'connected' property as true .The server is asynchronous and was written in python using asyncore/asynchat, it works fine with most open source MOO/MUD clients . I tried connecting my program to a simple synchronous echo server,here both read and write worked fine with no disconnections from either side . So my question is how do I make a persistent connection with the server?

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  • 2 way communication over http between a .Net service and Windows Forms Client

    - by user1802969
    I am looking to accomplish 2 way communication over http between a .Net service (WCF SOAP or REST, both options are open) hosted on IIS 7 and Windows Forms Client running on Windows 7. WebSockets are not supported with IIS 7 and all other Comet techniques allow only the web server to push data to client and not the other way around. The client will be very chatty, and there are thousands of clients, so I want to avoid creating a new HTTP request for each message to the server, though that is the last option. Is there any way to do this ?

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  • Java: stopping long HTTP operations

    - by kilonet
    I'm using Apache Common library for HTTP operations: HttpClient client = getClient(); PutMethod put = new PutMethod(url); FileRequestEntity countingFileRequestEntity = new FileRequestEntity(file, "application/octet-stream"); put.setRequestEntity(countingFileRequestEntity); client.executeMethod(put); put.releaseConnection(); I wonder how can safely interrup long HTTP operation. Running it in new thread and stopping it seems to be wrong way. HttpMethodBase has abort() method, but I can't understand how to use it because client.executeMethod blocks execution until it complets

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  • How do you make sure your pakcet is delivered to right client using public ip address

    - by TemporaryNickName
    So private IP addresses are 192.168.00 ~ 192.168.255.255 or 10.0.0.0 or 172.16.0.0 ~ 172.31.255.255 If I accepted a client to my serversocket, I can get the client's remoteIp address by using socket.getremotesocketaddress(); But I suspect the IP address that I'm getting from this method is only the public IP address and it must have more than one client using same public IP as this one (one like you see when you go on to the website www.whatismyip.com). So if I want to make sure that my packet is delivered to the right person using some IP address or otherthing that uniquely identifies a person, what should I have to do?

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  • client-server application design

    - by nelly
    Hi, i want to create a client-server application using sockets on .net platform and being new to networking programming and i have a dilemma. The client will send data to server often and also the server will notify clients often. What is the best way to design it? should the server keep a thread to communicate with each client until it quits or just the clients send data to the server and it update the clients regularly(few seconds) or none of those? Some help would be great. Thanks guys.

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  • operating sever client from same program

    - by sksingh73
    i want to make a single program for operating both server & client. i want my program to run in such a way that when program is launched, server should start listening for requests from other machines. but when i want to send data to other machines, my server should quit & client is launched so that i start sending data. once complete data has been transferred by client, it should quit & come back to server mode. Any suggestion on whether its feasible. if yes, then how.

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  • Applet in client-server infrastructure

    - by Andrey
    Hello! I have a general question concerning client-server design. We have a Java server with Spring, a GWT client program and some HTTP-servlets for our site. At the moment we also want to develop an applet which would communicate with that server in such a way GWT-client and site requests do. Is it a good idea to communicate with the server from applet by RMI? I.e. to create some Remote services, register them with Spring and call them from applet? Thanks in advance!

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  • Oracle VDI thin client terminal and Synergy

    - by katsumii
    I use my main laptop and old SunRay thin client hardware at my office.I set up Synergy for keyboard/mouse/clipboard sharing and I thought I hit this issue.  Bug #3002 - Mouse Pointer Invisible on Client PC - SynergyRDP and a thin client setup I found this workaround. Turning "Display pointer trails" on somehow made mymouse appear on thin client side.  This may or may not work in different kind of Oracle VDI setup or other vendors' thin client. 

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  • Client-side prediction for FPS

    - by newprogrammer
    People that understand client-side prediction and client-side interpolation, I have a question: When I play the game Team Fortress 2, and type cl_predict 1 into the developer's console, it enables client-side prediction. The also says "6 predictable entities reinitialized". It says this regardless of how many players are on the server, which makes sense, because other players are not predictable entities. I thought client-side prediction was only for the movement of the player. Are there other entities that the client can provide prediction for?

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  • What failure can kill a long running IRC client? [closed]

    - by Xeoncross
    I have an IRC bot that I built in PHP using sockets that attempts to run forever and (if disconnected) reconnects again. I have it listening to several channels. Apparently it's fairly resilient, because it can run for several days before the process ends and CRON has to start it up again. However, based on the fact the process ends I'm assuming there are other conditions I'm not accounting for that are causing problems. I have nothing in my error logs giving me a hint. In addition, sometimes the process will continue running - but I notice it's no longer present in any of the channels on the IRC server which makes me think it violated some part of the protocol. I have logic setup to handle: reply to PING's correctly reconnect on disconnect (and reconnect to channels) respond to private messages (so someone doesn't ban it) prevent memory leaks What other failure could be killing my long-running IRC client?

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  • PHP: Cookie only sent to http://www.xxx.com and NOT http://xxx.com

    - by Axel
    Hi, I have a php login which sets 2 cookies once some one login. the problem is that if you login from : http://www.mydomain.com and you go to http://mydomain.com you will find your self not logged in, I think that's because the browser only send the cookies to the first syntax. It's only one domain, the difference is the www. before the domain name, so how to set cookies to the whole domain whatever there is www. or not ? Thanks

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  • TCP client in C and server in Java

    - by faldren
    I would like to communicate with 2 applications : a client in C which send a message to the server in TCP and the server in Java which receive it and send an acknowledgement. Here is the client (the code is a thread) : static void *tcp_client(void *p_data) { if (p_data != NULL) { char const *message = p_data; int sockfd, n; struct sockaddr_in serv_addr; struct hostent *server; char buffer[256]; sockfd = socket(AF_INET, SOCK_STREAM, 0); if (sockfd < 0) { error("ERROR opening socket"); } server = gethostbyname(ALARM_PC_IP); if (server == NULL) { fprintf(stderr,"ERROR, no such host\n"); exit(0); } bzero((char *) &serv_addr, sizeof(serv_addr)); serv_addr.sin_family = AF_INET; bcopy((char *)server->h_addr, (char *)&serv_addr.sin_addr.s_addr, server->h_length); serv_addr.sin_port = htons(TCP_PORT); if (connect(sockfd,(struct sockaddr *) &serv_addr,sizeof(serv_addr)) < 0) { error("ERROR connecting"); } n = write(sockfd,message,strlen(message)); if (n < 0) { error("ERROR writing to socket"); } bzero(buffer,256); n = read(sockfd,buffer,255); if (n < 0) { error("ERROR reading from socket"); } printf("Message from the server : %s\n",buffer); close(sockfd); } return 0; } And the java server : try { int port = 9015; ServerSocket server=new ServerSocket(port); System.out.println("Server binded at "+((server.getInetAddress()).getLocalHost()).getHostAddress()+":"+port); System.out.println("Run the Client"); while (true) { Socket socket=server.accept(); BufferedReader in= new BufferedReader(new InputStreamReader(socket.getInputStream())); System.out.println(in.readLine()); PrintStream out=new PrintStream(socket.getOutputStream()); out.print("Welcome by server\n"); out.flush(); out.close(); in.close(); System.out.println("finished"); } } catch(Exception err) { System.err.println("* err"+err); } With n = read(sockfd,buffer,255); the client is waiting a response and for the server, the message is never ended so it doesn't send a response with PrintStream. If I remove these lines : bzero(buffer,256); n = read(sockfd,buffer,255); if (n < 0) { error("ERROR reading from socket"); } printf("Message from the server : %s\n",buffer); The server knows that the message is finished but the client can't receive the response. How solve that ? Thank you

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  • Symfony/Doctrine/SfGuardPlugin: Redirect to requested page (route), and not referrer

    - by Prasad
    I want to be able to take the user to the requested page after login, but this does not happen with sfGuard. ** My Register action requires SignIn ;) ** On the listing page [http://cim/frontend_dev.php/] - user clicks the 'Register' link [@register = register/index] - user is taken to 'Signin' page provided by sfGuard - after sign-in, user is taken back to the Listing page (instead of Register) This is quite annoying! But logical, because the referrer is the listing page. How can I change logic to make @register the referrer? Pl help. thanks public function executeSignin($request) { $user = $this->getUser(); $this->logMessage('Signin>>> form - isAuth() '.$user->isAuthenticated(), 'info'); if ($user->isAuthenticated()) { $this->getUser()->setAttribute('tenant', $this->getUser()->getGuardUser()->sfuser->Tenant->getID()); return $this->redirect($user->getReferer($request->getReferer())); } $class = sfConfig::get('app_sf_guard_plugin_signin_form', 'sfGuardFormSignin'); $this->form = new $class(); $referer = $user->getReferer($request->getReferer()); $this->logMessage('Signin>>> referer: '.$referer, 'info'); $this->logMessage('Signin>>> referer: '.$request->getReferer(), 'info'); if ($request->isMethod('post')) { $this->form->bind($request->getParameter('signin')); if ($this->form->isValid()) { $values = $this->form->getValues(); $this->getUser()->signin($values['user'], array_key_exists('remember', $values) ? $values['remember'] : false); $this->getUser()->setAttribute('tenant', $this->getUser()->getGuardUser()->sfuser->Tenant->getID()); $this->logMessage('Signin>>> sfUrl | @homepage: '.sfConfig::get('app_sf_guard_plugin_success_signin_url','@homepage'), 'info'); return $this->redirect("" != $referer ? $referer : sfConfig::get('app_sf_guard_plugin_success_signin_url','@homepage')); } } else { if ($request->isXmlHttpRequest()) { $this->getResponse()->setHeaderOnly(true); $this->getResponse()->setStatusCode(401); return sfView::NONE; } // if we have been forwarded, then the referer is the current URL // if not, this is the referer of the current request $user->setReferer($this->getContext()->getActionStack()->getSize() > 1 ? $request->getUri() : $request->getReferer()); $this->logMessage('Signin>>> oldy: '.$request->getUri(), 'info'); $this->logMessage('Signin>>> oldy: '.$request->getReferer(), 'info'); $module = sfConfig::get('sf_login_module'); if ($this->getModuleName() != $module) { return $this->redirect($module.'/'.sfConfig::get('sf_login_action')); } $this->getResponse()->setStatusCode(401); } } Trace: May 27 10:10:14 symfony [info] {sfPatternRouting} Connect sfRoute "sf_guard_signin" (/login) May 27 10:10:14 symfony [info] {sfPatternRouting} Connect sfRoute "sf_guard_signout" (/logout) May 27 10:10:14 symfony [info] {sfPatternRouting} Connect sfRoute "sf_guard_password" (/request_password) May 27 10:10:14 symfony [info] {sfPatternRouting} Match route "register" (/register) for /register with parameters array ( 'module' => 'register', 'action' => 'index',) May 27 10:10:14 symfony [info] {sfFilterChain} Executing filter "sfGuardRememberMeFilter" May 27 10:10:14 symfony [info] {sfFilterChain} Executing filter "sfRenderingFilter" May 27 10:10:14 symfony [info] {sfFilterChain} Executing filter "sfExecutionFilter" May 27 10:10:14 symfony [info] {registerActions} Call "registerActions->executeIndex()" May 27 10:10:14 symfony [info] {sfFrontWebController} Redirect to "http://cim/frontend_dev.php/login" May 27 10:10:14 symfony [info] {sfWebResponse} Send status "HTTP/1.1 302 Found" May 27 10:10:14 symfony [info] {sfWebResponse} Send header "Location: http://cim/frontend_dev.php/login" May 27 10:10:14 symfony [info] {sfWebResponse} Send header "Content-Type: text/html; charset=utf-8" May 27 10:10:14 symfony [info] {sfWebDebugLogger} Configuration 13.39 ms (9) May 27 10:10:14 symfony [info] {sfWebDebugLogger} Factories 50.02 ms (1) May 27 10:10:14 symfony [info] {sfWebDebugLogger} Action "register/index" 1.94 ms (1) May 27 10:10:14 symfony [info] {sfWebResponse} Send content (104 o) May 27 10:10:16 symfony [info] {sfPatternRouting} Connect sfRoute "sf_guard_signin" (/login) May 27 10:10:16 symfony [info] {sfPatternRouting} Connect sfRoute "sf_guard_signout" (/logout) May 27 10:10:16 symfony [info] {sfPatternRouting} Connect sfRoute "sf_guard_password" (/request_password) May 27 10:10:16 symfony [info] {sfPatternRouting} Match route "sf_guard_signin" (/login) for /login with parameters array ( 'module' => 'sfGuardAuth', 'action' => 'signin',) May 27 10:10:16 symfony [info] {sfFilterChain} Executing filter "sfGuardRememberMeFilter" May 27 10:10:16 symfony [info] {sfFilterChain} Executing filter "sfRenderingFilter" May 27 10:10:16 symfony [info] {sfFilterChain} Executing filter "sfExecutionFilter" May 27 10:10:16 symfony [info] {sfGuardAuthActions} Call "sfGuardAuthActions->executeSignin()" May 27 10:10:16 symfony [info] {sfGuardAuthActions} Signin>>> form - isAuth() May 27 10:10:16 symfony [info] {sfGuardAuthActions} Signin>>> referer: http://cim/frontend_dev.php/ May 27 10:10:16 symfony [info] {sfGuardAuthActions} Signin>>> referer: http://cim/frontend_dev.php/ May 27 10:10:16 symfony [info] {sfGuardAuthActions} Signin>>> oldy: http://cim/frontend_dev.php/login May 27 10:10:16 symfony [info] {sfGuardAuthActions} Signin>>> oldy: http://cim/frontend_dev.php/ May 27 10:10:16 symfony [info] {sfPHPView} Render "D:/projects/cim/plugins/sfDoctrineGuardPlugin/modules/sfGuardAuth/templates/signinSuccess.php" May 27 10:10:16 symfony [info] {sfPHPView} Decorate content with "D:\projects\cim\apps\frontend\templates/layout.php" May 27 10:10:16 symfony [info] {sfPHPView} Render "D:\projects\cim\apps\frontend\templates/layout.php" May 27 10:10:16 symfony [info] {main} Get slot "title" May 27 10:10:16 symfony [info] {sfWebResponse} Send status "HTTP/1.1 401 Unauthorized" May 27 10:10:16 symfony [info] {sfWebResponse} Send header "Content-Type: text/html; charset=utf-8" May 27 10:10:16 symfony [info] {sfWebDebugLogger} Configuration 16.06 ms (10) May 27 10:10:16 symfony [info] {sfWebDebugLogger} Factories 50.00 ms (1) May 27 10:10:16 symfony [info] {sfWebDebugLogger} Action "sfGuardAuth/signin" 14.53 ms (1) May 27 10:10:16 symfony [info] {sfWebDebugLogger} View "Success" for "sfGuardAuth/signin" 34.44 ms (1) May 27 10:10:16 symfony [info] {sfWebResponse} Send content (38057 o)

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  • Webmail client that can open multiple email addresses at once like a desktop client

    - by Trent
    I've got 5 email domains with multiple email addresses on each domain. Traditional webmail clients only seem to allow you to browse a single account at a time (ie, you log into that account). With over 20 email addresses I need to monitor, this is obviously a major time sink. Is there a (preferably OSS, unix-based) webmail client that simulates a desktop email client, ie I log in once and can access all the email addresses from a central control panel? I've considered using a ticket system but that is overkill and not really used to my needs.

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