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• How to choose a web server for a Python application?

  - by Phil

  Information and prerequisites: I have a project which is, at its core, a basic CRUD application. It doesn't have long running background processes which it forks at the beginning and talks to later on, nor does it have long running queries or kept alive connection requirements. It receives a request, makes some queries to the database and then responds. In order to serve static files and cachable files fast, I am going to use Varnish in all cases. Here is my question: After reading about various Python web application servers, I have seen that they all have their "fans" for certain, usually "personal" reasons, which got me confused since each usecase differs from the next. How can I learn about the core differentiating factors of Python web servers (in order) to decide how suitable they are for my project and if one would be better than the other? What are your (technically provable) thoughts on the matter? How should I choose a Python web server? Thank you.

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• Debugging Windows Service Timeout Error 1053

  - by Joe Mayo

  If you ever receive an Error 1053 for a timeout when starting a Windows Service you've written, the underlying problem might not have anything to do with a timeout.  Here's the error so you can compare it to what you're seeing: --------------------------- Services --------------------------- Windows could not start the Service1 service on Local Computer.   Error 1053: The service did not respond to the start or control request in a timely fashion. --------------------------- OK   --------------------------- Searching the Web for a solution to this error in your Windows Service will result in a lot of wasted time and advice that won't help.  Sometimes you might get lucky if your problem is exactly the same as someone else's, but this isn't always the case.  One of the solutions you'll see has to do with a known error on Windows Server 2003 that's fixed by a patch to the .NET Framework 1.1, which won't work.  As I write this blog post, I'm using the .NET Framework 4.0, which is a tad bit past that timeframe. Most likely, the basic problem is that your service is throwing an exception that you aren't handling.  To debug this, wrap your service initialization code in a try/catch block and log the exception, as shown below: using System; using System.Diagnostics; using System.ServiceProcess; namespace WindowsService { static class Program { static void Main() { try { ServiceBase[] ServicesToRun; ServicesToRun = new ServiceBase[] { new Service1() }; ServiceBase.Run(ServicesToRun); } catch (Exception ex) { EventLog.WriteEntry("Application", ex.ToString(), EventLogEntryType.Error); } } } } After you uninstall the old service, redeploy the service with modifications, and receive the same error message as above; look in the Event Viewer/Application logs.  You'll see what the real problem is, which is the underlying reason for the timeout. Joe

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• Is there a SIP provider in the UK which provides the P-Asserted-Identity header?

  - by nbolton

  In the US, Flowroute (low cost SIP trunking provider) provides P-Asserted-Identity in the SIP invite request header (example screenshots). It also allows you to set the caller ID for outgoing calls, for example by using the follow in extensions.conf for Asterisk: exten => id,n,Set(CALLERID(all)=123) However, in the UK, I've tried a couple of SIP providers and none of them let me do either of those things (see P-Asserted-Identity or set the caller-ID). Is this because of some sort of restriction in the UK phone networks, or is it only available to really expensive SIP trunking providers?

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• Belkin router issue

  - by walr1

  Hi, My cousin and I bought a wireless Belkin router for testing purposes. Please keep in mind for all of our tests there is no ethernet cable plugged in, just the router's power cord. We have been trying to "flood" it with PING requests on its default address 192.168.2.1, but it isn't doing a thing; not even logging any attempts of too many requests. I've disabled the firewall, disabled PING request block, etc. Any idea why this thing isn't being affected? We sent 4 million packets and it hasn't done a thing. Quite odd! Thanks.

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• Can I configure mod_proxy to use different parameters based on HTTP Method?

  - by Graham Lea

  I'm using mod_proxy as a failover proxy with two balance members. While mod_proxy marks dead nodes as dead, it still routes one request per minute to each dead node and, if it's still dead, will either return 503 to the client (if maxattempts=0) or retry on another node (if it's 0). The backends are serving a REST web service. Currently I have set maxattempts=0 because I don't want to retry POSTs and DELETEs. This means that when one node is dead, each minute a random client will receive a 503. Unfortunately, most of our clients are interpreting codes like 503 as "everything is dead" rather than "that didnt work but please try that again". In order to program some kind of automatic retry for safe requests at the proxy layer, I'd like to configure mod_proxy to use maxattempts=1 for GET and HEAD requests and maxattempts=0 for all other HTTP Methods. Is this possible? (And how? :)

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• whats the name of this pattern?

  - by Wes

  I see this a lot in frameworks. You have a master class which other classes register with. The master class then decides which of the registered classes to delegate the request to. An example based passed in class may be something this. public interface Processor { public boolean canHandle(Object objectToHandle); public void handle(Object objectToHandle); } public class EvenNumberProcessor extends Processor { public boolean canHandle(Object objectToHandle) { if (!isNumeric(objectToHandle)){ return false } return isEven(objectToHandle); } public void handle(objectToHandle) { //Optionally call canHandleAgain to ensure the calling class is fufilling its contract doSomething(); } } public class OddNumberProcessor extends Processor { public boolean canHandle(Object objectToHandle) { if (!isNumeric(objectToHandle)){ return false } return isOdd(objectToHandle); } public void handle(objectToHandle) { //Optionally call canHandleAgain to ensure the calling class is fufilling its contract doSomething(); } } //Can optionally implement processor interface public class processorDelegator { private List processors; public void addProcessor(Processor processor) { processors.add(processor); } public void process(Object objectToProcess) { //Lookup relevant processor either by keeping a list of what they can process //Or query each one to see if it can process the object. chosenProcessor=chooseProcessor(objectToProcess); chosenProcessor.handle(objectToProcess); } } Note there are a few variations I see on this. In one variation the sub classes provide a list of things they can process which the ProcessorDelegator understands. The other variation which is listed above in fake code is where each is queried in turn. This is similar to chain of command but I don't think its the same as chain of command means that the processor needs to pass to other processors. The other variation is where the ProcessorDelegator itself implements the interface which means you can get trees of ProcessorDelegators which specialise further. In the above example you could have a numeric processor delegator which delegates to an even/odd processor and a string processordelegator which delegates to different strings. My question is does this pattern have a name.

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• How Service Component Architecture (SCA) Can Be Incorporated Into Existing Enterprise Systems

  After viewing Rob High’s presentation “The SOA Component Model” hosted on InfoQ.com, I can foresee how Service Component Architecture (SCA) can be incorporated in to an existing enterprise. According to IBM’s DeveloperWorks website, SCA is a set of conditions which outline a model for constructing applications/systems using a Service-Oriented Architecture (SOA). In addition, SCA builds on open standards such as Web services. In the future, I can easily see how some large IT shops could potently divide development teams or work groups up into Component/Data Object Groups, and Standard Development Groups. The Component/Data Object Group would only work on creating and maintaining components that are reused throughout the entire enterprise. The Standard Development Group would work on new and existing projects that incorporate the use of various components to accomplish various business tasks. In my opinion the incorporation of SCA in to any IT department will initially slow down the number of new features developed due to the time needed to create the new and loosely-coupled components. However once a company becomes more mature in its SCA process then the number of program features developed will greatly increase. I feel this is due to the fact that the loosely-coupled components needed in order to add the new features will already be built and ready to incorporate into any new development feature request. References: BEA Systems, Cape Clear Software, IBM, Interface21, IONA Technologies PLC, Oracle, Primeton Technologies Ltd, Progress Software, Red Hat Inc., Rogue Wave Software, SAP AG, Siebel Systems, Software AG, Sun Microsystems, Sybase, TIBCO Software Inc. (2006). Service Component Architecture. Retrieved 11 27, 2011, from DeveloperWorks: http://www.ibm.com/developerworks/library/specification/ws-sca/ High, R. (2007). The SOA Component Model. Retrieved 11 26, 2011, from InfoQ: http://www.infoq.com/presentations/rob-high-sca-sdo-soa-programming-model

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• mod_rewrite not working?

  - by Sean Kimball

  I have a bunch of non-existent urls that need to be redirected to new ones, though they are not working... mod_rewrite does work and is enabled, I'm wondering if the redirect URL has to actually exist in order for a redirect ot work. Here is what I have: Redirect 301 /cgi-bin/commerce.cgi?display=action&emptyoverride=yes&template=Assets/XHTML/Advantage.html http://domain.com/the-bag-to-nature-advantage.html UPDATE this is the request that comes in [indexed in google!] http://domain.com//cgi-bin/commerce.cgi?display=action&emptyoverride=yes&template=Assets/XHTML/Advantage.html this is where it needs to go: http://domain.com/the-bag-to-nature-advantage.html

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• Difference between two kinds of Bing URL Referers

  - by joshuahedlund

  Most of the referral URLS that I get from Bing have the following syntax: http://www.bing.com/search?q=keywords+keywords&[some other variables] However I just noticed that maybe 10-20% of them are coming in like this: http://www.bing.com/url?source=search&[some other variables]&url=http%3A%2F%2Fwww.example.com/user-landing-page-on-my-site&yrktarget=_top&q=keywords+keywords&[some other variables] The first syntax gives me the keywords the user typed in, but the second actually gives me the keywords the user typed in and their landing page on my site. I was originally unaware of this second kind altogether because I have a customized referral report that filters out URLs containing my domain. But now that I noticed them I want to know why they occur to see if I can get more to occur this way because the second syntax contains more valuable information. If I go to one of the first URLs, it gives me a typical Bing query page. The second URLs seem to just redirect me to the Bing home page. I'm not sure if it has to do with the kind of search being performed (I also get a few http://www.bing.com/shopping/search?q= referers) or some other metric. Does anyone know what causes some referral URLs from Bing to have the /search?q syntax and others to have the /url?source syntax? P.S. I have verified that I am getting both kinds of URLs from non-advertising clicks. P.P.S. I am not talking about data in Google Analytics or similar software but the raw $_SERVER['HTTP_REFERER'] value coming from the client's original request.

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• Steps to send patch to Launchpad

  - by Alois Mahdal

  With a Git/Github background and knowing very little about Bazaar VCS, I would like to occasionally report a bug to Launchpad and even send a patch. I'd like to do it in a "proper" way so that it's ready for merging or improvement while not getting in way. I can't seem to find a decent simple How-to suited for my needs. So what I did so far: I have created a Launchpad account, reported the bug, installed Bazaar and setup SSH keys etc. Now if it was Github, I'd fork the repo, clone the forked repo, create a sanely named branch and do the work, commit + push, create a pull request using Github WUI. But it's not Github, and both LP and Bazaar architectures seem quite different from their Github/Git cunterparts. So could a kind soul save me from drowning in tons of documents and complile a straightforward step path, mainly the second part? Possibly including relevant CLI commands when they are needed? Edit: It seems that I should clarify if I'm asking specifically about Ubuntu packages (whatever it means) or Launchpad packages. I don't really care much about distinction between Ubuntu packages and non-Ubuntu packages. Any software could be in Ubuntu today and out of it tomorrow, or vice-versa. The development is what matters much more than distribution. Ao I was assuming that not every single package distributed in Ubuntu is hosted on Launchpad, an "official" or "default" workflow for Launchpad exists (well if all devs can agree on using Bazaar, why couldn't most of them agree on a patching workflow?), so I'm asking about the Launchpad way, not the Ubuntu way. And I chose AU because since the intersection is vast, I guess it's pretty on topic here.

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• How to manage long running background threads and report progress with DDD

  - by Mr Happy

  Title says most of it. I have found surprising little information about this. I have a long running operation of which the user wants to see the progress (as in, item x of y processed). I also need to be able to pause and stop the operation. (Stopping doesn't rollback the items already processed.) The thing is, it's not that each item takes a long time to get processed, it's that that there are usually a lot of items. And what I've read about so far is that it's somewhat of an anti-pattern to put something like a queue in the DB. I currently don't have any messaging system in place, and I've never worked with one either. Another thing I read somewhere is that progress reporting is something that belongs in the application layer, but it didn't go into the details. So having said all this, what I have in mind is the following. User request with list of items enters the application layer. Application layer gets some information from the domain needed to process the items. Application layer passes the items and the information off to some domain service (should the implementation of this service belong in the infrastructure layer?) This service spins up a worker thread with callbacks for both progress reporting and pausing/stopping it. This worker thread will process each item in it's own UoW. This means the domain information from earlier needs to be stored in some DTO. Since nothing is really persisted, the service should be singleton and thread safe Whenever a user requests a progress report or wants to pause/stop the operation, the application layer will ask the service. Would this be a correct solution? Or am I at least on the right track with this? Especially the singleton and thread safe part makes the whole thing feel icky.

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• Benefits of classic OOP over Go-like language

  - by tylerl

  I've been thinking a lot about language design and what elements would be necessary for an "ideal" programming language, and studying Google's Go has led me to question a lot of otherwise common knowledge. Specifically, Go seems to have all of the interesting benefits from object oriented programming without actually having any of the structure of an object oriented language. There are no classes, only structures; there is no class/structure inheritance -- only structure embedding. There aren't any hierarchies, no parent classes, no explicit interface implementations. Instead, type casting rules are based on a loose system similar to duck-typing, such that if a struct implements the necessary elements of a "Reader" or a "Request" or an "Encoding", then you can cast it and use it as one. Does such a system obsolete the concept of OOP? Or is there something about OOP as implemented in C++ and Java and C# that is inherently more capable, more maintainable, somehow more powerful that you have to give up when moving to a language like Go? What benefit do you have to give up to gain the simplicity that this new paradigm represents?

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• Does this BSD-like license achieve what I want it to?

  - by Joseph Szymborski

  I was wondering if this license is: self defeating just a clone of an existing, better established license practical any more "corporate-friendly" than the GPL too vague/open ended and finally, if there is a better license that achieves a similar effect? I wanted a license that would (in simple terms) be as flexible/simple as the "Simplified BSD" license (which is essentially the MIT license) allow anyone to make modifications as long as I'm attributed require that I get a notification that such a derived work exists require that I have access to the source code and be given license to use the code not oblige the author of the derivative work to have to release the source code to the general public not oblige the author of the derivative work to license the derivative work under a specific license Here is the proposed license, which is just the simplified BSD with a couple of additional clauses (all of which are bolded). Copyright (c) (year), (author) (email) All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. The copyright holder(s) must be notified of any redistributions of source code. The copyright holder(s) must be notified of any redistributions in binary form The copyright holder(s) must be granted access to the source code and/or the binary form of any redistribution upon the copyright holder's request. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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• How do I remove a LOT of indexed pages from Google?

  - by Thierry

  A few weeks ago we have figured out that Google has indexed some information we would rather keep in some confidentiality, in the format of individual PDF files. Our assumption was that this was a problem with our robots.txt we had overlooked. Even though we are not sure whether or not this is the case, we are certain that the robots.txt file is in a valid format and is, according to Google's webmaster tools, blocking the files. However, even after this adjustment that has been made weeks ago, Google still has the PDF files indexed, but does tell us further information cannot be provided due to the robots.txt file being present. As you can hopefully understand, this is unwanted behaviour due to the nature of the documents. I am aware that there is a request page being provided by Google for this purpose, but there are a lot of files. Is there an easier way to get Google to remove all of the files from its search engine? If not, is there anything else you could advise us to do besides manually requesting Google to remove every single page? Thanks in advance.

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• error while adding web service to server in website panel

  - by sam

  I got following error while creating website for user in website panel.I am not able to create any hosting space in server's hosting plan it is showing 0 mb space. Stack Trace: [SoapException: System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.UriFormatException: Invalid URI: The Authority/Host could not be parsed. at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind) at System.Uri..ctor(String uriString) at Microsoft.Web.Services3.WebServicesClientProtocol.set_Url(String value) at WebsitePanel.Server.Client.ServerProxyConfigurator.Configure(WebServicesClientProtocol proxy) at WebsitePanel.EnterpriseServer.ServiceProviderProxy.ServerInit(WebServicesClientProtocol proxy, ServerProxyConfigurator cnfg, String serverUrl, String serverPassword) at WebsitePanel.EnterpriseServer.ServiceProviderProxy.ServerInit(WebServicesClientProtocol proxy, ServerProxyConfigurator cnfg, Int32 serverId) at WebsitePanel.EnterpriseServer.ServiceProviderProxy.Init(WebServicesClientProtocol proxy, Int32 serviceId) at WebsitePanel.EnterpriseServer.WebAppGalleryController.InitFeedsByServiceId(Int32 UserId, Int32 serviceId) at WebsitePanel.EnterpriseServer.esWebApplicationGallery.GetGalleryApplicationsByServiceId(Int32 serviceId) --- End of inner exception stack trace ---] System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) +1485877 System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) +221 WebsitePanel.EnterpriseServer.esWebApplicationGallery.GetGalleryApplicationsByServiceId(Int32 serviceId) +68 WebsitePanel.Portal.WebAppGalleryHelpers.GetGalleryApplicationsByServiceId(Int32 serviceId) +31 can anybody help me in this.

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• Hyper-V Ubuntu 10.04, Filesystem suddenly becomes Read-Only?

  - by Daniel Upton

  We are running a Ubuntu 10.04 VM on a Hyper-V system, The VM is dedicated to running one of our web applications. We have enabled the Hyper-V drivers in /etc/initramfs-tools/modules like so: hv_vmbus hv_storvsc hv_blkvsc hv_netvsc And updated the kernel image like so: $ update-initramfs -u And all was good... until.. This morning i got a support request that our web application was throwing an error 500, so i checked the logs and nothing was there. Then I remembered that I had seen this on another of our ubuntu servers so I... $ touch foo.txt And my suspicions were confirmed: touch: cannot touch `foo.txt': Read-only file system Why is the filesystem randomly becoming readonly? Is this only in Ubuntu on HV? Is it a problem on RedHat or Cent?

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• LAMP Server: (104) Connection reset by peer

  - by StephenM

  A user reported the following problem when attempting to visit www.airlinemogul.com. The requested URL could not be retrieved While trying to retrieve the URL: http://www.airlinemogul.com/airlinemogul/index.php The following error was encountered: * Read Error The system returned: (104) Connection reset by peer An error condition occurred while reading data from the network. Please retry your request. There are no other issues reported by any other users, so it may be an isolated issue. Could anyone give me any suggestions as to how I could investigate the problem further or find a solution? Thanks.

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• squid running out of sockets

  - by drscroogemcduck

  I have a setup where squid sits in front of a java server and acts as a reverse proxy. Recently i've load tested the site and if i fire 100 threads at it each making a request using jmeter i start getting errors in my load test tool like 'no route to host' even though the load test tool and the server are on the same machine. if i run the following command where port 82 is the port my squid server is running on: netstat -ann | grep 82 | wc -l i get 22000 or something and most of them are in TIMED_WAIT. i'm thinking that maybe the huge number of sockets in the TIMED_WAIT state are starving the box of resources.

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• redirect all youtube video requests to a specific one

  - by iTayb

  I'm on an IT team in my company and I would like to block youtube to users. I don't want to just deny access to the whole youtube domain, but only to replace the .flv/.mp4 request with the one that I want. That way, if someone tries to watch youtube videos on the network, He'll get a video of why using our expensive bandwidth for pleasure is a no-no. I thought about using a packet manipulation program and just replace the video ID with something that I want, but I didn't manage to do it right.

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• Worker roles in Windows Azure to host a multiplayer server

  - by MrWiggels

  I've been doing research on where to host a simple multi-player backend for a simple game I'm developing. So as a first choice I downloaded the Windows Azure SDK, which provides a nice and simple emulator environment where you can test out your application before uploading. I also download the Azure Social Game Toolkit (Visit), and followed as far as my understanding can take me. So, down to the main question. Is there anybody with experience developing Azure applications. I'm developing a Action RPG game, in a similar vein to Diablo III. I was thinking of putting up Matchmaking, Friends Lists, etc. Is there another way to connect to Azure services via something like UDP or TCP for sending packets or does everything have to go through HTTP requests? Is it even possible to use HTTP request/response for something like this? All game commands will be simple. Because the game server and the clients will be kept in-sync and will have deterministic actions, I'm just going to send actions like "Use Primary Skill" and "Use Secondary Skill". Any hints, ideas, light bulbs or a smack-in-the-face presentation will be much appreciated.

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• Clustering and custom applications

  - by Ahmed ilyas

  I was not entirely sure what tags to put but hope this is ok. This is just a general question in regards to clustering and applications: so lets say we have a clustered environment setup. We cluster SQL Server (I dont know exactly how its done but lets just say its been done for the sake of argument). Now if a website or application is trying to access that database for read/write (say an ASP.NET app or a C# Winforms app) and during that time SQL goes down - it takes a couple of minutes for the clustering failover to take affect to switch to another node. What happens during this time? I think it will time out/unable to connect. BUT is there a way for it to place the request in some pipeline so when the cluster node is back up/switched over it will continue as normal? as you can see, I know nothing much about clustering! what about your own custom .NET apps? Would there be a special way to develop them? I know that you can say create a simple Hello world app, and cluster that but they wouldnt be something you could see interms of the UI or anything, so they would effectively need to be developed as a Windows Service perhaps or even as a standard Console app which runs and not wait for user input but you wouldnt see any output from it (unless you redirect output to somewhere else) What im getting at here is... for those who have experience or developed a cluster application in .NET, how did you do it and what are the things to be aware of? For example we have the cloud service - fundamentally its built on clustering - if there is an outage, another node takes place and service is resumed as normal but we dont really see much of that downtime.

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• How to keep background requests in sequence

  - by Jason Lewis

  I'm faced with implementing interfaces for some rather archaic systems, for handling online deposits to stored value accounts (think campus card accounts for students). Here's my dilemma: stage 1 of the process involves passing the user off to a thrid-party site for the credit card transaction, like old-school PayPal. Step two involves using a proprietary protocol for communicating with a legacy system for conducting the actual deposit. Step two requires that each transaction have a unique sequence number, and that the requests' seqnums are in order. Since we're logging each transaction in Postgres, my first thought was to take a number from a sequence in the DB, guaranteeing uniqueness. But since we're dealing with web requests that might come in near-simultaneously, and since latency with the return from the off-ste payment processor is beyond our control, there's always the chance for a race condition in the order of requests passed back to the proprietary system, and if the seqnums are out of order, the request fails silently (brilliant, right?). I thought about enqueuing the requests in Redis and using Resque workers to process them (single worker, single process, so they are processed in order), but we need to be able to give the user feedback as to whether the transaction was processed successfully, so this seems less feasible to me. I've tried to make this application handle concurrency well (as much as possible for a Ruby on Rails app), but now we're in a situation where we have to interact with a system that is designed to be single process, single threaded, and sequential. If it at least gave an "out of order" error, I could just increment (or take the next value off the sequence), but it's designed to fail silently in the event of ANY error. We are handling timeouts in a way that blocks on I/O, but since the application uses multiple workers (Unicorn), that's no guarantee. Any ideas/suggestions would be appreciated.

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• Generic Repositories with DI & Data Intensive Controllers

  - by James

  Usually, I consider a large number of parameters as an alarm bell that there may be a design problem somewhere. I am using a Generic Repository for an ASP.NET application and have a Controller with a growing number of parameters. public class GenericRepository<T> : IRepository<T> where T : class { protected DbContext Context { get; set; } protected DbSet<T> DbSet { get; set; } public GenericRepository(DbContext context) { Context = context; DbSet = context.Set<T>(); } ...//methods excluded to keep the question readable } I am using a DI container to pass in the DbContext to the generic repository. So far, this has met my needs and there are no other concrete implmentations of IRepository<T>. However, I had to create a dashboard which uses data from many Entities. There was also a form containing a couple of dropdown lists. Now using the generic repository this makes the parameter requirments grow quickly. The Controller will end up being something like public HomeController(IRepository<EntityOne> entityOneRepository, IRepository<EntityTwo> entityTwoRepository, IRepository<EntityThree> entityThreeRepository, IRepository<EntityFour> entityFourRepository, ILogError logError, ICurrentUser currentUser) { } It has about 6 IRepositories plus a few others to include the required data and the dropdown list options. In my mind this is too many parameters. From a performance point of view, there is only 1 DBContext per request and the DI container will serve the same DbContext to all of the Repositories. From a code standards/readability point of view it's ugly. Is there a better way to handle this situation? Its a real world project with real world time constraints so I will not dwell on it too long, but from a learning perspective it would be good to see how such situations are handled by others.

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• 503 service unavailable when debugging PHP script in Zend Studio

  - by user25932

  I have a web server with apache 2.0 installed. It comes with Zend Server install pack. When I’m trying to debug my php files apache serves a blank page with 503 service unavailable. Of course slow server-side code is tying up Apache requests for far too long, but I need it to wait, until my debugging comes to end. When I call to the page from a browser it launches ZendStudio debugging my PHP script (request redirects Zend Debugger module). I debug through my script and if I finish debugging in 120 seconds, I normally return to the browser. When it takes more than 120 seconds the browser displays '503 service unavailable' and I can't return to page output. I have even forced 'max_execution_time = 300' 'max_input_time = 600' in php.ini and 'TimeOut = 500' in httpd.conf. No matter whether it is Opera, IE or Firefox. I spent two days googling it, no right answer until now.

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• Can I save an Apache environment variable value with SetEnv?

  - by Nicholas Tolley Cottrell

  I am running Apache 2.2 with Tomcat 6 and have several layers of URL rewriting going on in both Apache with RewriteRule and in Tomcat. I want to pass through the original REQUEST_URI that Apache sees so that I can log it properly for "page not found" errors etc. In httpd.conf I have a line: SetEnv ORIG_URL %{REQUEST_URI} and in the mod_jk.conf, I have: JkEnvVar ORIG_URL Which i thought should make the value available via request.getAttribute("ORIG_URL") in Servlets. However, all that I see is "%{REQUEST_URI}", so I assume that SetEnv doesn't interpret the %{...} syntax. What is the right way to get the URL the user requested in Tomcat?

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