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WCF Client is Buffering with Streamed Transfer Mode
It seems that Fiddler may have been introducing its own buffer. With Fiddler closed, streamed requests were properly handed off to WCF. On a related note, on it seems that on .NET 4.0 and lower, server-side buffering for streamed WCF services that are hosted in IIS is unavoidable. The ASP.NET layer has its own buffering mechanism which waits until the message is fully received before passing it off to WCF. More details here.

Categories : C#

How to get latest video streamed to client without using cached copy?
How are you "streaming" your videos? If just a download link then perhaps look at Cache busting in ASP.NET, works fine with ServiceStack for static content, though not tried it with video. If your returning a stream, perhaps [AddHeader(CacheControl = "private")]? Or specify static cache settings in AppHost Configure method: this.SetConfig(new EndpointHostConfig { AddMaxAgeForStaticMimeTypes = new Dictionary<string, TimeSpan> { { "image/jpeg", TimeSpan.FromDays(7.0) }, { "video/mpeg",

Categories : C#

Why my query doesn't return any results from RavenDB?
You should check that the index "Raven/DocumentsByEntityName" is defined for the target database, and that your document has the correct metadata information. The metadata should have a line like this: "Raven-Entity-Name": "CountryRegion" If this does not help, please also post the ravendb version you are using. A fiddler trace might also be helpful.

Categories : C#

Separate internal errors from client errors in custom WCF error handling?
You should create your own exception class by deriving from System.Exception and throwing them where your validation fails. In your IErrorHandler implementation you should check if the exception is yours and return the Status code you want. For example if MyException was the derived exception: public void ProvideFault(Exception error, MessageVersion version, ref Message fault) { MyException me = error as MyException; if(me != null) // Set the status code. }

Categories : Wcf

Nutch 2.x No errors, No results neither
I've now started again with a complete new install of Nutch 2.2.1 - Hbase-0.94.10 and Solr 4.4.0 as advised vy someone on the mailinglist, due to that the versions mentioned in the tutorial are years old, and now the error I'm getting is: [root@localhost local]# bin/nutch inject /urls/seed.txt InjectorJob: starting at 2013-08-11 17:59:32 InjectorJob: Injecting urlDir: /urls/seed.txt InjectorJob: org.apache.gora.util.GoraException: java.lang.RuntimeException: java.lang.IllegalArgumentException: Not a host:port pair: �2249@localhost.localdomainlocalhost,45431,1376235201648

Categories : Apache

Asp.NET Web Api: Returning meaningful errors to client?
400 BadRequest could be used if what you are performing is validation logic and this validation logic fails for some reason. As far as the additional information is concerned, you might return some info in the body, for example as JSON payload: { "errorMessage":"Validation failed because user doesn't exist in alternative database" } If on the other hand you are attempting to update an entity that doesn't exist, you could also send a 404 status code.

Categories : Rest

my pro just shows client side validation errors
This is the expected behavior for client-side validation: it prevents a form post on error, because it can very quickly determine that the input would be invalid. If you don't want the client-side validation to run, you can disable it and rely on the corresponding server-side validation to generate the same error message (assuming you are validating server-side, which you should be).

Categories : Asp Net Mvc

WCF IEnumerable - Streamed Transport Net Tcp
Here is guidance on transferring large data with streaming. http://msdn.microsoft.com/en-us/library/ms733742.aspx At the bottom of the page is a link to some samples, one of which shows using TCP. http://msdn.microsoft.com/en-us/library/ms789010.aspx If this doesn't help, then perhaps you could provide more detail on how it is failing (error message)?

Categories : Wcf

no update on sql server database. No errors just no results
Your SQL uses @param type in the string. If you are looking to execute a stored procedure of some sort to negate most sql injection attacks on a website you might want to consider calling a stored procedure and adding SqlCommand.Parameter to the SqlCommand.Parameters Collection. Otherwise if you want to just execute the sql you should do string sql = String.Format("UPDATE TABLE set COLUMN = {0} where OTHERCOLUMN = {1}", varValue, varWhere);

Categories : C#

Breeze.js - Getting both client and server validation errors onto my entity
As of Breeze v 1.4.0, your server side validation failures should automatically be added to the client side validationResults on a per entity basis, ( in addition to be returned in fail() promise), so you shouldn't have to do anything else. Am I missing something?

Categories : Validation

Spring MVC REST Service and Client. I am looking for a better way to deal with errors
I've used this approach (with JSON/Jackson 2) to good success: class ErrorHolder { public String errorMessage; public ErrorHolder(String errorMessage) { this.errorMessage = errorMessage; } } @ExceptionHandler public @ResponseBody ResponseEntity<ErrorHolder> handle(ResourceNotFoundException e) { logger.warn("Teh resource was not found", e); return new ResponseEntity<ErrorHolder>(new ErrorHolder("Uh oh"), HttpStatus.NOT_FOUND); } Works with Spring 3.2.x at least.

Categories : Json

Android present streamed images
Updating the UI from a thread other than the UI/main thread will fail as Android does not allow it. Try using a Handler to post messages back to the UI thread. You could do something like this. final Handler h = new Handler(); timer.schedule(new TimerTask() { public void run() { if(flag){ h.post(new Runnable() { public void run() { Bitmap bmp = null; Log.i(APPID, "New frame"); try { bmp = session.getImage(); setImage(bmp); } catch (Exception e) { e.printStackTrace(); } } } else { timer.cancel(); } } }, 500, 500);

Categories : Android

Upgrading Google Mobile Ads iOS SDK from 5.0.5 to 6.4.2 results in linker errors
Maybe you need the -all_load linker flag option too? According to this article it's obsolete for newer ARM7 targets, but perhaps you have an old target? http://vntin.com/feeds.feedburner.com/blogspot/LTiVe See under this section: "Support for armv7s" "If you’re targeting the armv7s architecture, you will not need to add the -all_load linker flag to your projects anymore. " [Update] You can try to verify what's in the lib*.a file by using the nm command. nm -U libGoogleAdMobAds.a | grep kGADAdSizeBanner Also, clicking on the Log Navigator may provide some additional information. Select the last icon then your last build in the left nav. [Update 2] Someone on this site also complained about a linker problem with the new API. Might have to make small changes to your code. h

Categories : IOS

Python, why it is errors 10035 (on server) and 10053 (on client) during using TCP sockets?
You need to make the child socket blocking. Add this call "c.setblocking(1)" in the server file (server.py) before you append the new connection using "connections.append( [c, addr] )" -- like the following snippet. Looks like the child socket is inheriting the non-blocking option from the parent server socket. With this change, I was able to run your code without any errors. c, addr = server.accept() print 'Got connection from', addr c.setblocking(1) # Make it blocking. connections.append( [c, addr] ) The other alternative would be to catch socket.error in the recvFromSocket() function in the cs_common.py -- this is because if the recv() timeouts becuase child sockets are non-blocking, then the recv() call will return with an error. Since your code is not handling it,

Categories : Python

How can I import the Google API Objective-C Client Library in to my iOS project without getting errors?
I'll just quote what @borrrden already wrote. This worked for me. Make sure that you have the armv7 architecture included in your build settings under "Architectures"

Categories : IOS

1:1 Alignment of C# Structs with Streamed Delphi Records Possible?
Alignment is normally used by the compiler as an optimization. Actually every structure is padded to a multiple of 4 (or 8 I don't remember exactly). Update: What I state above about alignment is not accurate. Have a read of David's answer for details on how aligned records are treated by the compiler. The Wikipedia article contains a reasonable overview: http://en.wikipedia.org/wiki/Data_structure_alignment Anyway, you can use the Pack parameter to specify the alignment. A Pack value of 1 returns the exact size of the structure. [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)] About arrays, it's correct to use: [MarshalAs(UnmanagedType.ByValArray, SizeConst = 20)] public char[] someCharArray; Just take care when you convert from structure to byte array that

Categories : C#

Primefaces Printing Dynamic Streamed Contents
I used css to hide all other divs during print time and used window.print command. Print button <p:commandButton styleClass="noPrintBlock" ajax="false" value="Print" onclick="window.print();" actionListener="#{patientReportController.markAsPrinted()}" /> The component which I want to print. <p:panel styleClass="printBlock" id="divPrint" > </p:panel> Example of a component which I do not want to print <h:panelGroup styleClass="noPrintBlock"> </h:panelGroup> CSS @media print{ .noPrintBlock{ display: none; } .printBlock{ height: 100%; width: 100%; position: fixed; top: 0; left: 0; margin: 0; } }

Categories : JSF

Nginx + emacs - clearing file results in php errors not logging?
In your FPM Pool Configuration file you can add specific values instead of editing the php.ini file. Here is what I have in my development: php_flag[display_errors] = on php_admin_value[error_log] = /vhosts/example.com/logs/php_error_log php_admin_flag[log_errors] = on You would normally add these to the end of the file. You may already see a few examples pre-packaged there too. Don't forget to restart FPM after making the changes of course.

Categories : Emacs

No errors or results when executing simple query on SQL Server database
The function getdate() actually returns a datetime. Try converting it to a date: AND SessionDate = cast(getdate() as date) The time component is probably the problem -- preventing a match between the date and the datetime.

Categories : C#

Can a WCF service support both Buffered and Streamed transfer modes?
This is a big question. I understand the problem. The short answer is that you can't have both streaming and buffering in the same endpoint operation contract. You can, of course, run 1-many separate endpoints from the same web service, each with a different port, for instance with some using buffering and some using streaming. And, you can have the host set up to stream its responses while the client (using the same endpoint) can buffer its uploading requests to the host (and vice versa); that's not a problem. But buffering and streaming responses from the same host endpoint is not possible. We've run into the same issue with buffering downloads to the client from SQL. For a while we went to streaming for downloads, primarily to cure client device timeouts, but found streaming is memo

Categories : C#

overriding equals method in java but getting logical errors/unexpected results
The problem lies in this line: return s==n; Here, this will return true if both s and n are false. You should use s && n to return true only if both s and n are true.

Categories : Java

Thrift: Python Server, Erlang Client Errors... {thrift_socket_server,244,{child_error,function_clause,[]}}
Figured it out! I was using TBufferedTransport when I had specified framed transport in my erlang file. I changed it to TFramedTrasport, recompiled my thrift files, and everything worked nicely.

Categories : Python

unable to get this class working in java on client code - no compilation errors but runtime
In your constructor, you've defined a local variable charCounts: int[] charCounts= new int[TOTAL_LETTERS]; This shadows the instance variable charCounts, to which I think you meant to assign it. Assign it to the instance variable charCounts like this: charCounts = new int[TOTAL_LETTERS]; This means that, in your code, the instance variable charCounts remains null until you access and a NullPointerException results.

Categories : Java

Golang http request results in EOF errors when making multiple requests successively
I'm going to guess there is no problem with your code. The most likely cause of your problem is because the server is closing the connection. Rate limiting is one possible reason for this. Your test shouldn't be relying on an external service that's very brittle and not hermetic. Instead you should think about spinning up a test server locally.

Categories : Go

Why this action results an empty file on client side?
It could be because the underlying stream (in your case a MemoryStream) is not positioned at the beginning when you return it to the client. Try this just before the return statement: stream.Position = 0 Also, these lines of code: writer.Flush(); stream.Flush(); Are not required because the stream is Memory based. You only need those for disk or network streams where there could be bytes that still require writing.

Categories : Asp Net Mvc

Throwing an HttpResponseException always results in a StatusCode: 500 response in the client
I am doing something similar but in the extended ExceptionFilterAttribute. Not sure if you can do that but thought of sharing the code I currently use. This is just a sample. as I have lot more to add in this method. public override void OnException(HttpActionExecutedContext actionExecutedContext) { var actionName = actionExecutedContext.ActionContext.ActionDescriptor.ActionName; var controllerName = actionExecutedContext.ActionContext.ActionDescriptor.ControllerDescriptor.ControllerName; Logger.LogException(controllerName + ":" + actionName, actionExecutedContext.Exception); actionExecutedContext.Response = new HttpResponseMessage(HttpStatusCode.InternalServerError) { ReasonPhras

Categories : C#

How to zoom and rotate webcam video which is streamed by html5 GetUserMedia API with canvas?
Update The reason why this won't work is as follows: when applying CSS transform on an element it will only be rendered by browser that way. If you try to use for example the video element and draw its content to canvas the original content will be drawn excluding the CSS transformation. So in order for this to work you will have to transform the canvas' context before drawing the video to it. For example - for this to be convenient you can use this function will set all the transforms before the video is drawn: function updateCanvas() { ctx.setTransform(1, 0, 0, 1, 0, 0); ctx.clearRect(0, 0, canvas.width, canvas.height); ctx.translate(canvas.width * 0.5, canvas.height * 0.5); ctx.rotate(rotate * Math.PI / 180); ctx.scale(zoom, zoom); ctx.translate(-canvas.wid

Categories : Javascript

compareTo() giving conflicting results in a client/server application?
First, sometimes simple re-arrangement of logical expressions can improve code readability. For example, second condition is equal to the following (which looks more simple for me): ( chat_msg.compareTo("Bye!") != 0 && chat_msg.compareTo("Let's play!") != 0 ) Second, probably your client-server communication protocol adds some white space character to your string (and this character is not visible when you print the string). Try using debugger to check actual value of chat_msg.

Categories : Java

iOS Client connecting to NodeJS socket.io results in Stream end encountered
Turns out that socket.io has its own authentication protocol and is not compatible with SocketRocket out of the box. See this SO answer: How to use SocketRocket with socket.io? From the answers there, you could take a look at socket.io-objc

Categories : IOS

Modifying a collection while enumerating another one
Simplest thing to do here is to call coins.RemoveAll(coin => coin.delete);. (google List.RemoveAll). That leaves you with a list of coins with all the "deletes" removed in one statement, no need to worry about counters or loop variables or temp copies or whatever at all. So then you can iterate over the remaining coins doing whatever you want. coins.RemoveAll(coin => coin.delete); foreach (var coin in coins) coin.somethingElse(); If you need a faster implementation that only iterates through the list once, here's what you'd need. Don't use any solution with Remove or RemoveAt in a loop because those are slow operations, so using them in a loop will kill performance. The below will just move each "good" coin down to the index position and then increment index, so at any time

Categories : C#

Speed of enumerating Hashset
Yes, there is a huge difference between the two. Enumerable.ElementAt(int) is an O(n) operation, so your second is has O(n^2) complexity. In contrast, enumerating the set through the enumerator is an O(n) operation.

Categories : C#

Enumerating combinations by product
Let's say we want to get a time complexity of O(N * K) where N is the number of lists and K is the K-th product. We maintain a pointer at the beginning of each list (for simplicity I call this P[i] - i'th pointer at list i, and L[i] - the i'th list). Initially P[i] = 0 for each list (because we start indexing the lists from 0) Step 1: The first product is L[0][P[1]] * L[1][P[2]] * .. L[N][P[N]]. Step 2: For the next step we are interested in minimizing the next product. We select j (0<=j<=N) for which L[j][P[j] + 1] is minimum. We increment P[j] by 1 and then go at Step 1 for computing the next product. I think it's clear that the next product should be the minimum of all possibilities. If you want to count the number of unique products you simply maintain a counter which you

Categories : Misc

Enumerating class properties
Non-dynamic classes do not provide enumerable properties or methods. As stated in the description of the link you provided. Sets the availability of a dynamic property for loop operations. I think you might want to refactor your code on this approach. I have never had to loop over a classes properties like you are doing here. If you want to track items dynamically you should use an associative array and track them that way not at the class level like you are doing. And if you want strong data typing then use a vector.

Categories : Actionscript

Enumerating monitors on a computer
In case it is relevant in your case, when using Qt 5.x, you can use the QGuiApplication::screens() method (http://qt-project.org/doc/qt-5.1/qtgui/qguiapplication.html#screens) to enumerate all displays. Or if it is not relevant, you can always have a look into their source code, how they enumerate the displays and get all relevant properties (also regarding mirroring, extended desktops, and so on).

Categories : C++

What happens if I overwrite an ImmutableHashSet while enumerating it?
The subscriptions variable is only read at the start of the loop. Remember that foreach is translating your code into something like: using (var iterator = subscriptions.GetEnumerator()) { while (iterator.MoveNext()) { var s = iterator.Current; s.Subscriber.OnNext(args); } } So basically, changing the value of the subscriptions variable after you've called GetEnumerator() won't affect the rest of the behaviour at all - it'll only affect it next time. (Assuming the relevant memory barriers are in place, etc.)

Categories : C#

Trouble enumerating an array
The fgets function, as stated here, includes the new line ( ) character, since it is considered a valid character: A newline character makes fgets stop reading, but it is considered a valid character by the function and included in the string copied to str. This means that you are going to check, for example: "I left my heart in Harvard Med School" with "I left " so the match doesn't occur. You could try using gets or replacing the character with a NUL (): char search_for[80]; fgets(search_for, 80, stdin); search_for[strlen(search_for)-1] = '';

Categories : C

Why are there missing client-side results when using OData options with Entity Framework DBContext?
You don't mix and match QueryableAttribute and ODataQueryOptions<T>. Pick one depending on whether you want manual control over applying the query options (ODataQueryOptions<T>) or make it happen automatically (QueryableAttribute). You have two options, public IEnumerable<USER> Get(ODataQueryOptions<USER> options) { var dbContext = new ATMS.DAL.AtmsContext(); var ret = options.ApplyTo(dbContext.USERS).Cast<USER>(); return ret; } or [Queryable] public IEnumerable<USER> Get(ODataQueryOptions<USER> options) { var dbContext = new ATMS.DAL.AtmsContext(); var ret = dbContext.USERS; return ret; } The reason you are seeing that behavior is that you are applying the query twice, once using ODataQueryOptions<T>.ApplyTo an

Categories : C#

RavenDB OrderBy
If you are using an index you need to set the sortoptions for the Order property. From http://ravendb.net/docs/client-api/querying/static-indexes/customizing-results-order Numerical values, on the other hand, are stored as text and therefore require the user to specify explicitly what is the number type used so a correct sorting mechanism is enforced. This is quite easily done, by declaring the required sorting setup in SortOptions in the index definition: Sort(x => x.Order, SortOptions.Int); The index outlined above will allow sorting by value on the user's age (1, 2, 3, 11, etc). If we wouldn't specify this option, it would have been sorted lexically (1, 11, 2, 3, etc). The default SortOptions value is String. Appropriate values available for all numeric types (Byte, Doub

Categories : C#

Combinatoric Optimization - Enumerating all Subsets that Contain a Given Set
How about this # Ruby require 'set' s = Set[Set[1, 2, 3, 4], Set[3, 4, 5], Set[1, 2, 3, 7, 8, 9]] x = Set[1, 3, 4] class Set def powerset inject(Set[Set[]]) do |ps, item| ps.union ps.map {|e| e.union (Set.new [item])} end end end pow = s.powerset pow.select! { |sub|x <= sub.flatten } p pow This is O(n * x * 2^n) since we must iterate over the powerset 2^n and execute n unions (constant time) + x queries to see if X is in the sets.

Categories : Algorithm

Creating objects and enumerating them during runtime
You can create a static variable which is increased everytime you create a list, and use this variable to identify the created list : static int id = 0; FunctionThatCreateList { /* Your creation code */ SetId(id); id++; } That way, everytime you create a list, it's id will be set and you're sure it'll be unique

Categories : C++



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