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  • Windows Server TCP Client application in c# Stops working after a while

    - by user1692494
    I am developping an application in C# Net framework 2.0. It is basicly a service application with a tcp client class. Class for Tcp Client Part public TelnetConnection(string Hostname, int Port) { host = Hostname; prt = Port; try { tcpSocket = new TcpClient(Hostname, Port); } catch (Exception e) { //Console.WriteLine(e.Message); } } The application is connecting to the server and revieves update's and more information. It works for about 20 minutes then stops recieving information from the server. -- Server side Client is still connected and the client side its still connected but stops receiving information from the server. I've been searching Stack Overflow and Google but no luck. try { if (!tcpSocket.Connected) return null; StringBuilder sb = new StringBuilder(); do { Parse(sb); System.Threading.Thread.Sleep(TimeOutMs); } while (tcpSocket.Available > 0); return sb.ToString(); } Application works perfect when it runs as console application but when running as service. It just stops.

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  • Synchronization between hibernate running locally and on a server

    - by linead
    Is there an easy way using a library to facilitate the synchronization of two hibernate instances. One running locally on a client and one running on a central server exposed via a web service. So Client tracks changes it makes, pushes them to the Server. The server ensures that the clients is not updating out of sync objects and stores the clients changes. The Client can also sync with the Server so that it can see the changes made by other clients. The idea is that the client can be run offline, without access to the server and only come online to synchronize when needed.

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  • Persistant Http client connections in java

    - by Akusete
    I am trying to write a simple Http client application in Java and am a bit confused by the seemingly different ways to establish Http client connections, and efficiently re-use the objects. Current I am using the following steps (I have left out exception handling for simplicity) Iterator<URI> uriIterator = someURIs(); HttpClient client = new DefaultHttpClient(); while (uriIterator.hasNext()) { URI uri = uriIterator.next(); HttpGet request = new HttpGet(uri); HttpResponse response = client.execute(request); HttpEntity entity = response.getEntity(); InputStream s = entity.getContent(); processStream (); s.close(); } In regard to the code above, my questions is: Assuming all URI's are pointing to the same host (but different resources on that host). What is the recommended way to use a single http connection for all requests? And how do you close the connection after the last request? --edit: Also what is the difference between using uri.openConnection(), versus HttpClient? Which is preferable, and what other methods exist?

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  • Servlet send image from server and save in client

    - by sangi
    Hi, I'm new and just developing on J2EE. I am modifying an existing application (an OpenSource project). I need to save an image on a client sent by the server, but I do not know how. This activity must be done in a transparent manner without affecting the existing operation of the application. From the tests done I get this error: java.lang.IllegalStateException: getWriter () has Already Been Called for this response. How should carry out this task, according to your own opinion? How do I save on the client, locally, the image? Update: Thanks for the answers. My problem is that: the image is generated on the server, but not for direct client request (there is no link to click on web page), the picture is composed using other services on the Internet. reconstruct the image on the server. This image must be sent to the client to be saved locally. so I'd like it to appear a window where you assign the destination image plus I'd like the rest of the application were not affected by this activity. The application is yet on production. Thank you very much for your response.

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  • ASP.NET: How to get same validators control to be both client-side and server-side

    - by harrije
    Hello, For the ASP.NET validator controls, I want to use both client-side validation for the user experience and server-side validation to guard against hackers. ASP.NET documentation leads me to believe that if EnableClientScript="True" then there will be no server-side validation if client-side validation is possible for the user agent. To get server-side validation, the documentation says use EnableClientScript="False", which bypasses client-side validation altogether. Am I misunderstanding how the validator controls work? I ask because it seems obvious that many developers would want both client and server side validation together, and I find it hard to believe both together is not possible with one of the standard validation controls. If I am understanding the ASP.NET documentation correctly, then I can find only two options: Use two validator controls exactly the same except for their ID and EnableClientScript properties. Obviously ugly for maintaining two controls almost the same. Write some code behind to check if postback then invoke the Validate method on the validator group. Why write code behind if there a way to be automatic from the control? Is there a way to do so using a single validator control with no code behind? Thanks in advance for your input.

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  • C++ interface inheritance problem

    - by james t
    Hey, i'm trying to create a c++ stomp client, my client constructor is : Client(std::string &server, short port, std::string &login, std::string &pass, Listener &listener); it gets a listener object which when Listener is the following interface : class Listener { virtual void message(StmpMessage message) =0; }; now i attempt to instantiate a client in a test class : class test : public virtual Listener { public: void message(StmpMessage message) { message.prettyPrint(); } int main(int argc, char* argv[]) { Client client("127.0.0.1", 61613, *this); return 0; } }; i'm sending this to the client because this is a listener object, i get the following error : /Users/mzruya/Documents/STOMPCPP/main.cpp:18: error: no matching function for call to 'Client::Client(const char [10], int, test&)' /Users/mzruya/Documents/STOMPCPP/Client.h:43: note: candidates are: Client::Client(std::string&, short int, std::string&, std::string&, Listener&) /Users/mzruya/Documents/STOMPCPP/Client.h:37: note: Client::Client(const Client&)

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  • Is there a faster way to deploy an OVA template?

    - by Luke
    I need to deploy vSphere Server Appliance 5.1. I have vSphere Client running locally and my internet upload is capped at 3 Mbps. It says it's going to take about 200 minutes to upload. When selecting a URL as opposed to a local file, does vSphere Client download it locally and then upload, or does it download the OVA directly to the server? My goal is to avoid waiting 3 1/2 hours for this to upload. If specifying a URL isn't any faster, are there any other methods that would allow me to deploy from the datacenter instead of my office? We don't have any Windows VM's installed on our cluster. So unfortunately I don't have a Windows machine with faster upload speed.

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  • setting a timeout for an InputStreamreader variable

    - by Noona
    I have a server running that accepts connections made through client sockets, I need to read the input from this client socket, now suppose the client opened a connection to my server without sending anything through the server's socket outputstream, in this case, while my server tried to read the input through the client socket's inputstream, an exception will be thrown, but before the exception is thrown i would like a timeout say of 5 sec, how can I do this? currently here's how my code looks like on the server side: try { InputStreamReader clientInputStream = new InputStreamReader(clientSocket.getInputStream()); int c; StringBuffer requestBuffer = new StringBuffer(); while ((c = clientInputStream.read()) != -1) { requestBuffer.append((char) c); if (requestBuffer.toString().endsWith(("\r\n\r\n"))) break; } request = new Request(requestBuffer.toString(), clientSocket); } catch (Exception e) // catch any possible exception in order to keep the thread running { try { if (clientSocket != null) clientSocket.close(); } catch (IOException ex) { ex.printStackTrace(); } System.err.println(e); //e.printStackTrace(); }

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  • wireless profile saving problem please help me out

    - by Jayjitraj
    DATA_BLOB in; DATA_BLOB out; BYTE pin=(BYTE)"FIPL2"; DWORD din=strlen((char*)pin)+1; in.pbData = pin; in.cbData = din; if(CryptProtectData(&in,L"what is it",NULL,NULL,NULL,0,&out)) { BYTE *b=out.pbData; Now I want to convert it into hexadecimal to save as my wifi password so what should i do }

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  • Problem adding a behaviors element to my WCF client config

    - by SteveChadbourne
    I'm trying to add a behaviors element to my client config file so I can specify maxItemsInObjectGraph. The error I get is: The element 'system.serviceModel' has invalid child element 'behaviors'. List of possible elements expected: 'bindings, client, extensions'. Here is my config: <configuration> <system.serviceModel> <bindings> <basicHttpBinding> <binding name="BasicHttpBinding_KernService" maxBufferSize="2147483647" maxReceivedMessageSize="2147483647"> <security mode="None" /> </binding> </basicHttpBinding> </bindings> <behaviors> <endpointBehaviors> <behavior name="ServiceViewEventBehavior"> <dataContractSerializer maxItemsInObjectGraph="2147483647"/> </behavior> </endpointBehaviors> </behaviors> <client> <endpoint address="http://localhost/KernMobile.WCF/KernService.svc" binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_KernService" contract="KernWcfService.KernService" name="BasicHttpBinding_KernService" behaviorConfiguration="ServiceViewEventBehavior" /> </client> </system.serviceModel> </configuration> It's also complaining about the behaviorConfiguration attribute in the endpoint element. Any ideas? .Net 4.0 BTW.

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  • Any FTP clients for Mac OS X that support upload via temporary filename?

    - by Chris582
    Hi, does anybody know of a FTP client (for Mac OS X) that supports uploading to a temporary filename? When overwriting a file on the server, most FTP clients first empty the file and then proceed to upload new content. (Which is how FTP is supposed to work, so everything is fine.) However, what I would like to see is that the FTP client uploads content to a temporary file and once all the content is on the server, replaces original file. This is good feature, because existing file is upgraded almost instantaneously; otherwise, it would be "broken" while the upload is still in progress. On Windows, this feature is available in WinSCP, but I have not found any options for Mac, so far. Any recommendations?

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  • Double hashing passwords - client & server

    - by J. Stoever
    Hey, first, let me say, I'm not asking about things like md5(md5(..., there are already topics about it. My question is this: We allow our clients to store their passwords locally. Naturally, we don't want them stored in plan text, so we hmac them locally, before storing and/or sending. Now, this is fine, but if this is all we did, then the server would have the stored hmac, and since the client only needs to send the hmac, not the plain text password, an attacker could use the stored hashes from the server to access anyone's account (in the catastrophic scenario where someone would get such an access to the database, of course). So, our idea was to encode the password on the client once via hmac, send it to the server, and there encode it a second time via hmac and match it against the stored, two times hmac'ed password. This would ensure that: The client can store the password locally without having to store it as plain text The client can send the password without having to worry (too much) about other network parties The server can store the password without having to worry about someone stealing it from the server and using it to log in. Naturally, all the other things (strong passwords, double salt, etc) apply as well, but aren't really relevant to the question. The actual question is: does this sound like a solid security design ? Did we overlook any flaws with doing things this way ? Is there maybe a security pattern for something like this ?

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  • How to profile object creation in Java?

    - by gooli
    The system I work with is creating a whole lot of objects and garbage collecting them all the time which results in a very steeply jagged graph of heap consumption. I would like to know which objects are being generated to tune the code, but I can't figure out a way to dump the heap at the moment the garbage collection starts. When I tried to initiate dumpHeap via JConsole manually at random times, I always got results after GC finished its run, and didn't get any useful data. Any notes on how to track down excessive temporary object creation are welcome.

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  • SQL Server error handling: exceptions and the database-client contract

    - by gbn
    We’re a team of SQL Servers database developers. Our clients are a mixed bag of C#/ASP.NET, C# and Java web services, Java/Unix services and some Excel. Our client developers only use stored procedures that we provide and we expect that (where sensible, of course) they treat them like web service methods. Some our client developers don’t like SQL exceptions. They understand them in their languages but they don’t appreciate that the SQL is limited in how we can communicate issues. I don’t just mean SQL errors, such as trying to insert “bob” into a int column. I also mean exceptions such as telling them that a reference value is wrong, or that data has already changed, or they can’t do this because his aggregate is not zero. They’d don’t really have any concrete alternatives: they’ve mentioned that we should output parameters, but we assume an exception means “processing stopped/rolled back. How do folks here handle the database-client contract? Either generally or where there is separation between the DB and client code monkeys. Edits: we use SQL Server 2005 TRY/CATCH exclusively we log all errors after the rollback to an exception table already we're concerned that some of our clients won't check output paramaters and assume everything is OK. We need errors flagged up for support to look at. everything is an exception... the clients are expected to do some message parsing to separate information vs errors. To separate our exceptions from DB engine and calling errors, they should use the error number (ours are all 50,000 of course)

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  • Another developer revoked and re-created my client's iOS Distribution Certificate - does this mean I can never update my client's existing app?

    - by Schnapple
    Here is the story so far: A client hired us to do an iPhone app for them. This client had never done an iPhone app before and as part of the arrangement we handled all aspects for them, including app store submission, and we handle some level of future development (new features, bug/security fixes, etc.) We created a Distribution certificate and key pair on the client's behalf We developed the app, published it to the App Store without incident Some time later the client hired a second developer to do a different app for them This second developer, it appears, has revoked the existing Distribution certificate and created a new one with a new key pair on their system This second developer shared the new Distribution certificate and key pair with us for future reference. Due to user error, this new certificate and key pair has now been imported onto the Macintosh where the original certificate and key pair for the original app we developed were created and the originals were not backed up. So we have App #1 on the App Store with Distribution certificate/key pair #1 App #2 either on the App Store or soon to be using Distribution certificate/key pair #2 Distribution certificate/key pair #1 appears to be lost now So my question is: if we ever need to update App #1, will we be able to, using Distribution certificate/key pair #2? Or will we have to upload it as a new app?

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  • What software to use for data backup?

    - by ViliusK
    What software should I use to make back-ups for of my computer files? Features I need: copies should be backup'ed on my Ubuntu server. client soft should monitor folders which I've chosen to backup. client soft should run on Windows XP, Windows 7, Linux. there should be Web UI to view backup'ed file versions. there should be availability to see diff with older versions. backup should be done over Internet to remove machine - server. Any suggestions?

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  • C socket programming: recv / select not seeing sent messages

    - by Fantastic Fourier
    Hey guys, I had some questions, about socket programming for client-server using TCP/IP. I am using select() to recv(), which works fine when client send() messages to server, but not the other way around. The send() returns positive (and reasonable) numbers of bytes sent by server but I know that the nubmer of bytes "sent" really means "sent out of the socket", not "sent and was received by the client." The select() function seems to work fine. So given that, my guess is that it's the send() function that is giving me the problem. Probably the address of client in send() is not correct. But when I compared address.sin_addr.s_addrmember (it's an unsigned long int) of struct sockaddr_in from recv() and send() of server, they are identical. So I am kind of lost as to what could be wrong?

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  • Time to start a counter on client-side.

    - by Felipe
    Hi everybody, I'm developing an web application using asp.net mvc, and i need to do a stopwatch (chronometer) (with 30 seconds preprogrammed to start in a certain moment) on client-side using the time of the server, by the way, the client's clock can't be as the server's clock. So, i'm using Jquery to call the server by JSon and get the time, but it's very stress because each one second I call the server to get time, something like this: $(function() { GetTimeByServer(); }); function GetTimeByServer() { $.getJSon('/Home/Time', null, function(result) { if (result.SecondsPending < 30) { // call another function to start an chronometer } else { window.SetTimeout(GetTimeByServer, 1000); //call again each 1 second! } }); } It works fine, but when I have more than 3 or 4 call like this, the browser slowly but works! I'd like to know, how improve more performace in client side, or if is there any way to do this... is there any way to client listen the server like a "socket" to know if the chronometer should start... PS: Sorry for my english! thanks Cheers

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  • Maven profile for single module

    - by c0mrade
    I have a multi module maven project, which builds successfully, I'd like to build just one of the modules I have. How would I do that with profiles ? I could do it from console in two ways, one way is go to the child module and mvn package or I could use reactor to build just one module. Can I do the same thing with profiles? By modifying POM? Thank you EDIT If is impossible from POM, can I do it from settings.xml ?

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  • Twitter4J - Looking up profile details without logging in

    - by wvd
    Hello all, I've been using Twitter4J for a quite a while now, but I can't seem to find this particular feature. I want to be able to search on a name, and when the certain user is on twitter, I want to retrieve basic information such as tweets, followers (like you can access via http) - but how to do is in Twitter4J? Neither the code examples or the source could help me. Thanks, William van Doorn

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  • Polling Functionality inside profile page and users wall in Facebook

    - by Pankaj Khurana
    Hi, I have visited page "http://www.facebook.com/FamilyGuy". They are providing poll features on their wall. There are radio buttons with some options. If i click on a particular option the response is shown in the form of graph their only. There is another way also . If i click on become a fan. Then this form is posted on my wall. From their i can vote and graph is generated similarly to previous procedure. I want to know how it is done. Thanks

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  • Java/Swing: low-profile button height?

    - by Jason S
    I would like to reduce the vertical size of a JButton. The following code works fine for K 1 but I can't seem to reduce the size. Any suggestions? JButton button = /* ... get button here ... */ Dimension d = button.getPreferredSize(); d.setSize(d.getWidth(), d.getHeight()*K); button.setPreferredSize(d);

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  • Google Chrome wont start after changing hostname

    - by user254473
    I tried to start google chrome in terminal several times, and I keep receiving the following message: ... :ERROR:process_singleton_linux.cc(309)] The profile appears to be in use by another Google Chrome process (8629) on another computer ("previous name of the computer"). Chrome has locked the profile so that it doesn't get corrupted. If you are sure no other processes are using this profile, you can unlock the profile and relaunch Chrome. ... :ERROR:simple_message_box_views.cc(208)] Unable to show a dialog outside the UI thread message loop: Google Chrome - The profile appears to be in use by another Google Chrome process (8629) on another computer ("previous name of the computer"). Chrome has locked the profile so that it doesn't get corrupted. If you are sure no other processes are using this profile, you can unlock the profile and relaunch Chrome. Any suggestions? Thanks in advance.

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  • How can I remount an NFS volume on Red Hat Linux?

    - by user76177
    I changed the user id of a user on an NFS client that mounts a volume from another server. My goal is to get the 2 users to have the same id, so that both servers can read and write to the volume. I changed the id successfully on the client system, but now when I look at the NFS mount from that system, it reports the files being owned by the old id. So it looks like I need to "refresh" that mount. I have found many instructions on how to remount, but each seems slightly different according to the type of system. Is there a simple command I can run to get the mounted volume to refresh so that it interprets the new user settings?

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  • Gearman client doBackground always returns GEARMAN_TIMEOUT

    - by Ascherer
    So, ive got a simple gearman system running right now, with a worker running. The worker basically just takes the payload (a random number in this case, and is supposed to echo it back to the screen. Literally an echo, not returning to the client. The client sends the random number. Im trying to do a $client->doBackground( 'post', 65482, md5(uniqid())); but its coming back with a 47 error (GEARMAN_TIMEOUT) every time. getErrNo() returns 0, error() returns something about GEARMAN_TIMEOUT However, when i change it to just $client->do(blah, blah, blah), it works just fine. I've even occasionally seen it where the worker still echo's the number, even after getting the timeout error... public function execute() { $method = 'do'; if( !$this->getBlock() ) { $method .= ( $this->getPriority() == 'Normal' ? '' : $this->getPriority() ) . 'Background'; } else { $method .= $this->getPriority(); } echo "Method: $method \t Worker: {$this->getName()} \t Payload: {$this->getPayload()} \t Hash: {$this->getHash()}\n"; $this->setResult( $this->getClient() ->$method( $this->getName(), $this->getPayload(), $this->getHash() ) ); if( $this->getClient()->returnCode() != GEARMAN_SUCCESS ) { echo "Code: " . $this->getClient()->returnCode() . "\t" . GEARMAN_TIMEOUT . "\n"; } }

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