Flash :: Handle Client And Server Validation With Flex 3?
May 5, 2011
I'm a new grad, so please be kind. I'm working on validating input in a Flex DataGrid cell that the user can edit. The rows in the DataGrid are backed by an mx.collections.ArrayCollection that includes a [Bindable]Model that I wrote. I want to validate against a custom client-side Validator, if-and-only-if that passes I want to validate the input on the server. If client-side validation fails, I want to display the normal validation error (see image below). If server-side validation fails, I want to use the same sort of UI components to notify the user. The solution should not include any external framework (Cairngorm or PureMVC).
[Code]...
How do Flex programmers validate on the server, immediately after the valid client-side validation passes?
I realize it seems silly to search out this "synchronous" design and I hope someone has an answer to solve my problem with best practices. In my defense, the reason I want to validate on the server immediately following client-side validation is so that I'm using Flex's validation framework. If I get an invalid response from the server, I want to leverage the built-in UI components that Flex has to tell the user something is incorrect about his/her input.
We're writing a flash application that can download a MP3 file, convert it to a Sound object, get the raw data and make some processing (like adding sounds, change octaves). After the processing, we want to send the data back to the server in chunks, so the server will be able to glue the data together and recover the new generated file. The problem is: if we send to the server "wav" pieces of sound, we are able to glue them together without any problem in the generated file. However, if we convert each wav piece to a mp3 file (so we can send a smaller file to the server) and join the mp3 files at the server, the result is a sound with some problems at the merge point.
This is how we load the mp3 file from the server:
sourceSnd.load(new URLRequest("sample url to mp3")); sourceSnd.addEventListener(Event.COMPLETE, carregou);
This is how we convert each piece of mp3 to bytearray and wav:
I am working on a page which uses uploadify to upload several images. The requires the user to upload these files. Is there a way to validate these field(s) on the client-side, such as with jQuery or JavaScript, prior to submission? I am comfortable with doing the server-side validation, such as with PHP.
I've created a custom textInput componenet that handles it's own validation using a private validator. The validation is enabled depending on the state of the component i.e. validation is enable when the components state is "edit".However, when the state changes from edit the internal validator is set to not enabled but the validation errors on the textbox do not clear - the textInput still has the red border and on mouseover the validation errors come up. What I want to happen is that when a validator is disabled the error formatting and error messages clear from the text input control.
Does anyone have any idea how to do this I tried setting the internal validator instance to enabled = false and dispatching a new focusOutEvent as below but the validation error formatting is still applied to the textInput contrl.
_validatorInstance.enabled = false; //clear the validation errors if any dispatchEvent(new FocusEvent(FocusEvent.FOCUS_OUT));
I need to develop client server application that involve gaming. I have no experience in flash and I was reading about the AMF3 protocol that is compact and fast, is it better than xml/json for data exchange? Also I need it to be on port 80.
My client is in Flash/Flex (game with chat) and it will be talking to a Java server. What is the best way (protocol / interface) for my Flash client to talk to my server? I heard about Flash Remoting MX, but it is a request / response mechanism. I could always request something and wait for asynchronous notifications from server. Then request again, implementing something like a Comet server.Anyways, what is the industry standard for this type of communication: Flash Client talking to Java server, supporting asynchronous "push" notifications from server.
I am trying to send a simple HTTP message from Flex to C# server, but it seems that I am getting tow calls, first is the real one and the second is an empty one.
Why is that and how can I handle it?
This is my C# code:
TcpListener listener = new TcpListener(IPAddress.Any, 9400); listener.Start(); Console.WriteLine("Server started");
[Code].....
I been trying to send a true HTTP response a notice another thing, the second call is coming without waiting for the first call, if I am putting the response thread to short sleep(100 milliseconds in my test) then I am getting the second call before I been able to response for the first one.
how can I find on fms server that client disconnected if if client disconnected due to power cut off. I client manually close the application then onDisconnect on server is called but if due to power cut off it does not called.
I want to create an application that has these features
- At client side: Display a list of images, when user click on one image, data will be stored in MySQL database.
- At server side: Manage images used in client side, I can delete, add new images.
Is this possible for me to achieve this using Flex? And if it is able, will my output be 2 separate SWF files? And where can I find the materials to read on writing such applications?
I've read some books on creating stateless websites, I've read some about stateful client applications, but a lot of complexity comes along when you have to combine both. We have a Flex application that needs to persist data to a database via .NET services. Things to keep in mind are:
- Concurrency (optimistic/pessimistic)
- Performance: Flex needs to load in lots of data so lazy-loading is often necessary.
- Do you use Dto's to transfer data between server and client?
I'll tell you the history of our product. We've used SubSonic from the beginning as a o/r mapper. SubSonic objects are converted to dto's written by us and these dto's are transferred to the client. Clientside the dto's are converted to the domain model. If clientside a domain model object needs to be saved, it is converted back to a dto and send to the server. Server side the dto is converted to a subsonic object and saved to the database.
Now, some time ago, we needed the domain model on the .NET server side... so now we have like three models on the server side, the subsonic model, the dto model and the domain model. The dto model is more simple and resembles the database more, the domain model has much more logic. It gets complex... We now have to synchronize the AS3 domain model code with the C# domain model code. If we could do it again (of get time to refactor) I think we wouldn't use the dto's anymore, but transfer the domain model between client and server. Dto's are simple objects so easy to transfer. Domain model objects can be very complex.
I'm building a Flex application, which is going to perform many server requests (let's say, that almost all interactions require an update from server). At the moment I'm using remote procedure calls for it. But I was wondering if using a socket would be better. In other terms, is maybe better to keep the connection alive rather then performing many calls in sequence? For my demo app I only have 1 client. Is the number of clients connecting to the server a factor for this choice?
I have created a client with Flex Builder which works in a browser but also in an Air windowed application. I must connect it to a server and it has to do asynchronous request related to changing data of the server.Because of the too much expensive cost of LiveCycleDS license, I was looking for other ways, maybe open source and i found the following solutions:
Adobe BlazeDS Granite Data Services WebORB Community Edition
I want to ask you which is the easy way to create the solution described above, expecially i want to use J2EE application server type.
As far as In understand the Flex technology, a Flex client connects to a Flex server to retrieve business information. Is this the only allowed connection for the client, back to the originating server? Or can a Flex client also open a secondary connection to a different server wich runs BlazeDS for message exchange?(This might offer an option for load balancing and cross-platform development).
Update: I have found this page which links to the Cross-domain policy file specification:[URL]..
I'm trying to read a xml file from client. After search for it. I have got to upload the file to the server with this code. var imagesFilter:FileFilter = new FileFilter("*.jpg,*.gif,*.png", "*.jpg;*.gif;*.png;*.jpeg"); fileRef.browse([imagesFilter]); But what I want to do is to read the file from client and parse it without uploading it to the server.
I have an asp page that loads a response " user=exists " everytime I try to update a database record (when of course the record already exists!) How can I handle this response with AS3 in Flash?
I have Flex/AIR app that connects to a tomcat server via BlazeDS. I'm not finding that I have to integrate an old webapp (struts/jsp) and I'd like to keep that webapp untouched except for login, authentication and session handling. Also a 3rd java app that uses httpclient.
Currently I have some blazeDS remote objects to handle login/logout with a few RPC calls. In turn, FlexSession objects are created and handled. Is there a way to use httpclient and javascript to call those blazeds RPCs so I dont have to recode and have 3 different means to handle logins and sessions?
Using RecursiveDirectoryIterator of PHP i am able to create directory tree and can even flatten it using RecursiveIteratorIterator class , but I want to create directory tree structure which TREE component of flex understands . The following is an array structure in php which flex understands.
I have 12 display monitors installed in different floors in a building. These monitors display announcements that will be update once in a day. I'm retrieving these announcements from db and storing in an array and displaying it all day long. In addition to this, I have a requirement to display emergency alert messages on the monitors. My Server is a windows 2000 server. I'm using asp for creating the JSON object.
For the emergency alert I am thinking of doing this: Create a page in asp that lets user to enter emergency msg and save to db. Create a page in asp that will check if there an emergency msg in db and show it in a asp page in json. Create a timer that pings this json page every 1 second. If it's available then show it. Is there any other sophisticated method available to poll the server or to send messages from server to client?
I have a server with some simple java objects running. I want to build the client with Flex and connect to the server data with BlazeDS. The problem is the Flash Builder is not generating the Classes correctly. Just the properties are being generated, the inheritance are not being generates.
We are trying to create a sqlite db file using java on the server, and encrypt it.Then we send the encrypted db file to a client's pc, which has an Adobe Air desktop app running.The air app then needs to be able to open/read-from the encrypted db file (client is read-only).We are using java 1.6, flex/actionscript 4.5, and Air 3.1.We can create the sqlite db file on the server and send it to the client, and it can be read by the client without issues, when we do not encrypt it.But we are having trouble with the encryption part. We've read quite a lot of documentation about Actionscript's ability to open encrypted sqlite files using AES + CCM (URL...).And we're trying to use java's crypto package to encrypt the sqlite db file.The encryption is important because we don't want the client to be able to open the sqlite db file with any sqlite browser, only with our Air application.
I am trying to create a flash player to stream an on online Internet radio station using FMS. I chose FMS after being told that I need RTMP server to extract the metadata. Our radio audio is being encoded using a DJ interface called SAM Broadcaster. But for some reason, it does not have an option to send over the stream directly to a Flash Media Server. Only options are either IceCAST or ShoutCAST. How should i setup the stream? Should it be Stream encoder>> IceCAST/SHOUTCast Server>>Flash Media Server>>Flash Player Client. Or should I setup Stream Encoder>>Flash Media Server>>Flash Player Client? Shouldn't Flash Media Server be an alternative to IceCast or Shoutcast? If that is the case, how do I send over the stream from SAM Broadcaster directly to Flash Media Server without restreaming through another streaming server?
What would be the crucial things to optimize when you have hundreds of people connected to your application, with most of them being in a video conference with RTMFP direct_connections, and also some using RTMP connections?
Our app seems to go down under heavy load. - RTMFP stops working (no one can connect to the service with RTMFP NetConnection) and RTMP NetStreams don't work either, however Text Chat works.
Server we use have a connection limit of 500 connections, and 2.5mbps speed limit per connection (a video conference with 4 people uses less than that so it seems fine).
I want to download files from the server side to client side without prompting a window to the user to download when any updates happen at server side.Right now I am using urlstream class but first file is downloading completely rest of the files contents downloading partially.
editCode sample taken from other post. Warning: it's a huuuge chunk o'code.
I'm creating a scrollbar gallery from a tutorial on this site. Though I've completed the tutorial, and customised the gallery to my own needs, however I'm trying to make a very small change to it - and no matter what I do, keep running into problems. I'm trying to replace the rectangular handle with my own customised handle - a (20 x 20) 'circular' png image that I've imported into Flash, made a graphic and stored in the library (though I understand it can be imported using actionscript, like the other images in the gallery).
We are currently in the process of trying to connect a c# server from a flash app. This hasnt been a problem so far - we have simply used the Socket class.We now have a requirement to encrypt the stream using SSL/TLS. This is no problem in c#, but much more problematic on the flash side. So far we have found two options: As3crypto lib, and AIR 2.0 SecureSocket. However, neither option has proved to be successful.
As3Crypto - TLSSocket
Using this method when we execute the code, the server throws an exception - this appears to be due to As3Crpyto's PARTIAL support of TLS.
AIR 2.0 - SecureSocket
We are currently using the latest Flex 4 SDK. We have imported AirGlobal.swc to alllow us to create a SecureSocket in a similar manner to the TLSSocket. The code builds but does not run - some File Not found error or something - probably because SecureSocket is not found in the runtime. I assume this is because AIR is intended for desktop applications rather than apps embedded in a browser.
So, now we're stuck. We have the option of encrypting the data instead using some PGP algorithm available in the As3Crypto lib. However, we would much prefer to encrypt the stream using something like TLSSocket or SecureSocket.
I have a Flash client that I want to connect to a server. Both are using localhost and port 50000 so there shouldn't be any cross-domain problems. I also set Access Network Only in the publishing settings. When I call the XMLSocket connect, the server seems to get a new connection. But, the XMLSocket.onConnect callback is not called with success=true.[code]...
What technology are better (robust, stable, speed) for rich web app with flash movies, chat, etc. Somebody said that Red5 will drop down if more that 50 users try to suck video stream from it. Is there people who use Java on server side and Flash for client side?
