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  • Sending multiline message via sockets without closing the connection

    - by Yasir Arsanukaev
    Hello folks. Currently I have this code of my client-side Haskell application: import Network.Socket import Network.BSD import System.IO hiding (hPutStr, hPutStrLn, hGetLine, hGetContents) import System.IO.UTF8 connectserver :: HostName -- ^ Remote hostname, or localhost -> String -- ^ Port number or name -> IO Handle connectserver hostname port = withSocketsDo $ do -- withSocketsDo is required on Windows -- Look up the hostname and port. Either raises an exception -- or returns a nonempty list. First element in that list -- is supposed to be the best option. addrinfos <- getAddrInfo Nothing (Just hostname) (Just port) let serveraddr = head addrinfos -- Establish a socket for communication sock <- socket (addrFamily serveraddr) Stream defaultProtocol -- Mark the socket for keep-alive handling since it may be idle -- for long periods of time setSocketOption sock KeepAlive 1 -- Connect to server connect sock (addrAddress serveraddr) -- Make a Handle out of it for convenience h <- socketToHandle sock ReadWriteMode -- Were going to set buffering to LineBuffering and then -- explicitly call hFlush after each message, below, so that -- messages get logged immediately hSetBuffering h LineBuffering return h sendid :: Handle -> String -> IO String sendid h id = do hPutStr h id -- Make sure that we send data immediately hFlush h -- Retrieve results hGetLine h The code portions in connectserver are from this chapter of Real World Haskell book where they say: When dealing with TCP data, it's often convenient to convert a socket into a Haskell Handle. We do so here, and explicitly set the buffering – an important point for TCP communication. Next, we set up lazy reading from the socket's Handle. For each incoming line, we pass it to handle. After there is no more data – because the remote end has closed the socket – we output a message about that. Since hGetContents blocks until the server closes the socket on the other side, I used hGetLine instead. It satisfied me before I decided to implement multiline output to client. I wouldn't like the server to close a socket every time it finishes sending multiline text. The only simple idea I have at the moment is to count the number of linefeeds and stop reading lines after two subsequent linefeeds. Do you have any better suggestions? Thanks.

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  • Iphone Custom Scrollview indicator

    - by Hrithik
    I am currently working on an application for a client, and they have made an odd request. The request involves putting a custom image as the indicator for the scrollview. I am not even sure if this is possible but if it is can you please let me know how one would go about doing that. Thanks

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  • Getting Facebook App's User Public Information

    - by geoffrobinson
    I have a client who would like to pull public information about people who "like" some of their web pages or are associated with their Facebook app. I wanted to do a proof of concept, but we really don't about any particular methodology. Another option we want to explore is to assume we have captured a Facebook user ID/email. Can we use that to collect public profile information?

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  • MVC 2 Validation without BuddyClasses

    - by Muhammad Adeel Zahid
    Hello EveryOne, i m using asp.NET MVC 2 for my current project and i need to validate form fields both on client and server side. for that i started with DataAnnotations. Now, i figure out that i have to write buddy class for every model or i have to go to designer generated code and put my annotations there (not a good idea though). if someone can suggest me a solution that helps me avoid writing those buddy classes and get the same functionality. Regards Adeel

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  • how to read values from the remote OPC Server

    - by Shailesh Jaiswal
    I have created one asp.net web service. In this web service I am using the web method as follows. The web service is related to the OPC ( OLE for process control) public string ReadServerItems(string ServerName) { string txt = ""; ArrayList obj = new ArrayList(); XmlServer Srv = new XmlServer("XDAGW.CS.WCF.Eval.1"); RequestOptions opt = new RequestOptions(); ReadRequestItemList iList = new ReadRequestItemList(); iList.Items = new ReadRequestItem[3]; iList.Items[0] = new ReadRequestItem(); iList.Items[0].ItemName = "ServerInfo.ConnectedClients"; iList.Items[1] = new ReadRequestItem(); iList.Items[1].ItemName = "ServerInfo.TotalGroups"; iList.Items[2] = new ReadRequestItem(); iList.Items[2].ItemName = "EventSources.Area1.Tracking"; ReplyItemList rslt; OPCError[] err; ReplyBase reply = Srv.Read(opt, iList, out rslt, out err); if ((rslt == null)) txt += err[0].Text; else { foreach (xmldanet.xmlda.ItemValue iv in rslt.Items) { txt += iv.ItemName; if (iv.ResultID == null) // success { txt += " = " + iv.Value.ToString() + "\r\n"; obj.Add(txt); } else txt += " : Error: " + iv.ResultID.Name + "\r\n"; } } return txt; } I am using the namespaces as follows using xmldanet; using xmldanet.xmlda; I have installed XMLDA.NET client component evaluation. In this there is an in built Test client which successfully reads the values of these data items from the remote OPC server. I also provides the template through which we can build the OPC based applications. In the above code I am trying to read the values of the data items but i am not able to read the values. I have applied the breakpoint. In that I can see that the condition if (iv.ResultID == null) becomes false & also there is null values in the variable rslt. Please tell me where I am doing mistake ? how should I correct my mistake ? can provide me the correct code ?

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  • Where are Riak Post-Commit Hooks run?

    - by pixelcort
    I'm trying to evaluate using Riak's Post-Commit Hooks to build a distributed, incremental MapReduce-based index, but was wondering which Riak nodes the Post-Commit Hooks actually run on. Are they run on the nodes the client used to put the commits, or on the primary nodes where the data is persisted? If it's the latter, I'm thinking I can from there efficiently do a map or reduce and put additional records from the output.

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  • XEP-0080 User Location in Smack Library.

    - by Kristof
    Hi, I would like to create a simple XMPP client in java that shares his location (XEP-0080) with other clients. I already know I can use the smack library for XMPP and that it supports PEP, which is needed for XEP-0080. Does anyone have an example how to implement this or any pointers, i don't find anything using google. thanks in advance.

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  • How to monitor an existing queue from WebSphere MQ?

    - by Jorge
    I have a .NET application that needs to monitor a queue in WebSphere MQ. I need to react to each message without impacting the current process. The client application can't explicity send me the same message. Can I read a message without removing it from the queue? Can I be notified for each message? Can I configure the MQ to duplicate the current queue? Is there another solution?

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  • Can anyone explain UriMatcher (Android SDK)?

    - by mobibob
    I have been tasked with designing my web services client code to use the utility class UriMatcher in the Android SDK. Unfortunately, the example in the Dev Guide does not relate to anything in my mind. I know I am missing some fundamental points to the functionality and possibly about Uri itself. If you can tie it to some web APIs that are accessible with HTTP POST request, that would be ideal.

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  • yahoo connectivity with java code

    - by sharma
    Dear all, I want to develop a yahoo client (core java) which connects to yahoo messenger ,checks for the authentication and login through java code. I have already used jymsg api ,but since yahoo changed its protocol after august 15,2009 i m not able to connect to yahoo server through java code.Is there any api or source available?Do i need to change the authentication method.help in this 2 resolve problem.

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  • Is there any way to send a mail from within my iPhone application?

    - by Mustafa
    I want to send an email from within my iPhone application, primarily because i don't want to quit my application. Is there ANY way to do that? Solution: 1) I found this open source API which does that: http://code.google.com/p/skpsmtpmessage/ Anyone can write their own smtp client for this purpose. (If you can invest that much time - that is) 2) Use a web service to send the message details and handle message sending functionality at server end. Thanks.

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  • Can't make my WCF extension work

    - by Sergio Romero
    I have a WCF solution that consists of the following class libraries: Exercise.Services: Contains the implementation classes for the services. Exercise.ServiceProxy: Contains the classes that are instantiated in the client. Exercise.HttpHost: Contains the services (*.svc files). I'm calling the service from a console application and the "first version" works really well so I took the next step which is to create a custom ServiceHostFactory, ServiceHost, and InstanceProvider so I can use constructor injection in my services as it is explained in this article. These classes are implemented in yet another class library: 4. Exercise.StructureMapWcfExtension Now even though I've modified my service this: <%@ ServiceHost Language="C#" Debug="true" Factory="Exercise.StructureMapWcfExtension.StructureMapServiceHostFactory" Service="Exercise.Services.PurchaseOrderService" %> I always get the following exception: System.ServiceModel.CommunicationException Security negotiation failed because the remote party did not send back a reply in a timely manner. This may be because the underlying transport connection was aborted. It fails in this line of code: public class PurchaseOrderProxy : ClientBase<IPurchaseOrderService>, IPurchaseOrderService { public PurchaseOrderResponse CreatePurchaseOrder(PurchaseOrderRequest purchaseOrderRequest) { return base.Channel.CreatePurchaseOrder(purchaseOrderRequest); //Fails here } } But that is not all, I added a trace to the web.config file and this is the error that appears in the log file: System.InvalidOperationException The service type provided could not be loaded as a service because it does not have a default (parameter-less) constructor. To fix the problem, add a default constructor to the type, or pass an instance of the type to the host. So this means that my ServiceHostFactory is never being hit, I even set a breakpoint in both its constructor and its method and they never get hit. I've added a reference of the StructureMapWcfExtension library to all the other ones (even the console client), one by one to no avail. I also tried to use the option in the host's web.config file to configure the factory like so: <serviceHostingEnvironment> <serviceActivations> <add service="Exercise.Services.PurchaseOrderService" relativeAddress="PurchaseOrderService.svc" factory="Exercise.StructureMapWcfExtension.StructureMapServiceHostFactory"/> </serviceActivations> </serviceHostingEnvironment> That didn't work either. Please I need help in getting this to work so I can incorporate it to our project. Thank you. UPDATE: Here's the service host factory's code: namespace Exercise.StructureMapWcfExtension { public class StructureMapServiceHostFactory : ServiceHostFactory { private readonly Container Container; public StructureMapServiceHostFactory() { Container = new Container(); new ContainerConfigurer().Configure(Container); } protected override ServiceHost CreateServiceHost(Type serviceType, Uri[] baseAddresses) { return new StructureMapServiceHost(Container, serviceType, baseAddresses); } } public class ContainerConfigurer { public void Configure(Container container) { container.Configure(r => r.For<IPurchaseOrderFacade>().Use<PurchaseOrderFacade>()); } } }

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  • Software architectures, changes over time?

    - by Vimvq1987
    I want to list software architectures from which were used in history to which are using now. As far as I know, they're client-server, cloud-computing,...But I cannot get a full list of them. Can you please give me this: Software architecture, years active, architecture that replaced it and the reason of replacement. A little detailed explanation will be much appreciated. Thank you so much.

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  • Webdriver: Tests crash with internet explorer7 with error Modal dialog present

    - by user1207450
    Following tests is automated by using java and selenium-server-standalone-2.20.0.jar. The test crashes with the error: Page title is: cheese! - Google Search Starting browserTest 2922 [main] INFO org.apache.http.impl.client.DefaultHttpClient - I/O exception (org.apache.http.NoHttpResponseException) caught when processing request: The target server failed to respond 2922 [main] INFO org.apache.http.impl.client.DefaultHttpClient - Retrying request Exception in thread "main" org.openqa.selenium.UnhandledAlertException: Modal dialog present (WARNING: The server did not provide any stacktrace information) Command duration or timeout: 1.20 seconds Build info: version: '2.20.0', revision: '16008', time: '2012-02-27 19:03:04' System info: os.name: 'Windows XP', os.arch: 'x86', os.version: '5.1', java.version: '1.6.0_24' Driver info: driver.version: InternetExplorerDriver at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:170) at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:129) at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:438) at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:139) at org.openqa.selenium.ie.InternetExplorerDriver.setup(InternetExplorerDriver.java:91) at org.openqa.selenium.ie.InternetExplorerDriver.<init>(InternetExplorerDriver.java:48) at com.pwc.test.java.InternetExplorer7.browserTest(InternetExplorer7.java:34) at com.pwc.test.java.InternetExplorer7.main(InternetExplorer7.java:27) Test Class: package com.pwc.test.java; import org.openqa.selenium.By; import org.openqa.selenium.WebDriver; import org.openqa.selenium.WebDriverBackedSelenium; import org.openqa.selenium.WebElement; import org.openqa.selenium.htmlunit.HtmlUnitDriver; import org.openqa.selenium.ie.InternetExplorerDriver; import com.thoughtworks.selenium.Selenium; public class InternetExplorer7 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub WebDriver webDriver = new HtmlUnitDriver(); webDriver.get("http://www.google.com"); WebElement webElement = webDriver.findElement(By.name("q")); webElement.sendKeys("cheese!"); webElement.submit(); System.out.println("Page title is: "+webDriver.getTitle()); browserTest(); } public static void browserTest() { System.out.println("Starting browserTest"); String baseURL = "http://www.mail.yahoo.com"; WebDriver driver = new InternetExplorerDriver(); driver.get(baseURL); Selenium selenium = new WebDriverBackedSelenium(driver, baseURL); selenium.windowMaximize(); WebElement username = driver.findElement(By.id("username")); WebElement password = driver.findElement(By.id("passwd")); WebElement signInButton = driver.findElement(By.id(".save")); username.sendKeys("myusername"); password.sendKeys("magic"); signInButton.click(); driver.close(); } } I don't see any modal dialog when I launched the IE7/8 browser manually. What could be causing this?

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  • Getting error on opening excel file from eclipse

    - by Ravisha
    I am getting following error on Cannot create the in-place editor This is probably because there is no OLE editor registered against the type of file you were trying to open. Failed to create Ole Client. result = -2147417851 I have MS office 2007,and the excel file is stored as "save as 2003 version".

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  • citrix ica.enumerateApplications() returns zero

    - by kambamsu
    Hi, I seem to have the following problem. Whenever i call ICA.EnumerateApplications(), it always returns a zero. Same with ICA.enumerateServers(). But when i launch a published application via setting ICA.InitialProgram i have no problems in launching. Anything that i am missing here?? Client version is 10.x Thanks

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  • Passing a DefaultHttpClient between activites

    - by searchMaker
    Hi all, I am trying to maintain my session variables that I get back in a cookie from my website in my DefaultHttpClient by passing the client between activities. Simply put how can I pass this object between activities to maintain my session variables? Bundle.put... doesn't seem to support this object. If it does how does it work with DefaultHttpClient? Thanks in advance to anyone who can help.

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  • MVVM-Light: The target "RunCodeAnalysis" does not exist in the project when i do build??

    - by mark smith
    Hi there, Just built myself a mvvmlight app and if i press f5 TO COMPILE and run all works ok, it displays the wpf window but if i do a BUILD i get an error Error 1 The target "RunCodeAnalysis" does not exist in the project. I am using the visual studio 2010 professional version RTM The only thing i see strange is the target framework which is set to .NET framework 4 client profile Anybody know why this happens??

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  • Tomcat cache filter

    - by mabuzer
    How to have resource handler in tomcat, which simply check resource like js or css and append an ?[last-modified-date] to it's url, so we enable cache, and be sure that client-browser use right resource? thanks in advance...

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  • Spring to understand properties in YAML

    - by litius
    Did Spring abandon YAML to use as an alternative to .properties / .xml because of: [Spring Developer]: ...YAML was considered, but we thought that counting whitespace significant was a support nightmare in the making... [reference from spring forum] I am confident YAML makes a lot of sense for properties, and I am using it currently on the project, but have difficulties to inject properties in a <property name="productName" value="${client.product.name}" /> fashion. Anything I am missing, or I should create a custom YamlPropertyPlaceholderConfigurer ? Thank you, /Anatoly

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