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• NSIS Check Textbox empty not working

  - by Hernán

  I'm trying to display a page in NSIS to obtain two different values. I want both to be not empty. The page actually displays altough I can't get my page leave function to check properly for empty fields. Function CCInstallOpts ReserveFile "cc_installopt.ini" !insertmacro MUI_INSTALLOPTIONS_EXTRACT "cc_installopt.ini" !insertmacro MUI_INSTALLOPTIONS_DISPLAY "cc_installopt.ini" FunctionEnd My page leave function where I validate fields (4 and 5 ) is : Function CCInstallOptsLeave Push $R0 Push $R1 !insertmacro MUI_INSTALLOPTIONS_READ $R0 "cc_installopt.ini" "Field4" "State" !insertmacro MUI_INSTALLOPTIONS_READ $R1 "cc_installopt.ini" "Field5" "State" StrCmp $R0 "" mustcomplete StrCmp $R1 "" mustcomplete StrCpy $CC_CyberID $R0 StrCpy $CC_VCode $R1 goto exitfunc mustcomplete: MessageBox MB_OK|MB_ICONEXCLAMATION "Empty not allowed" Abort exitfunc: Pop $R1 Pop $R0 FunctionEnd Note that I want to store the entered values into $CC_VCode and $CC_CyberID variables to be later used on different files (I've defined both as:) Var /GLOBAL CC_VCode Var /GLOBAL CC_CyberID Thanks in advance.

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• MembershipProvider, IPrincipal, IIdentity?

  - by MRFerocius

  Hello guys; I have a conceptual question... I am making an Intranet application (Web platform) for a company. I have a SQL Server DB with these tables: Users (userID, userName, userPass, roleID) Roles (roleID, roleName) Pages (pageID, pageURL) RolesXPages(pageID, roleID) How is the best way to create a structure to store all this information while the user navigates the site, I mean, on the thread I should be able to check his role, his pages (the ones he can access) I have been reading and there is a lot of stuff there where Im confused, I saw the MembershipProvider, IPrincipal, IIdentity, etc classes but Im not sure what should be the best one for me. Any thoughts... Thanks in advance! Edit: Everytime gets more confusing... I just want to handle those structures at runtime and be able to mantain state during page callbacks or changing pages...

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• Forms Authentication and Login controls

  - by DotnetDude

  I am upgrading a website written using ASP.NET 1.1 and the logic for the login page includes verifying the credentials, calling FormsAuthentication.SetAuthCookie() and populating the Session with the user information. I am updating this page to use Login controls and the Membership API and am trying to wrap my head around the concepts that have been changed. Most of the samples I see do not do anything on the login button event handler, so is the logic of setting the cookie abstracted out into the control? Also, how do I check if a user is logged in or not on other pages. Does it still store user information using the Session? How do I check if a user belongs to a particular role or not (Earlier, I would look in the Session object to do something like this) Is the Session a bad way of storing user info? Thanks

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• Passing paramenters on the stack

  - by oxinabox.ucc.asn.au

  When you pass parameters to a function on the cpu stack, You put the parameters on then JSR puts the return address on the stack. So than means in your function you must take the top item of the stack (the return address) before you can take the others off) eg is the following the correct way to go about it: ... |Let’s do some addition with a function, MOVE.L #4, -(SP) MOVE.L #5, -(SP) JSR add |the result of the addition (4+5) is in D0 (9) ... add: MOVE.L (SP)+, A1 |store the return address |in a register MOVE.L D0, -(SP) |get 1st parameter, put in D0 MOVE.L D2, -(SP) |get 2nd parameter, put in D0 ADD.L D2, D0 |add them, |storing the result in D0 MOVE.L A1, -(SP) |put the address back on the |Stack RTS |return

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• Anything wrong with spamming GC.KeepAlive(KeyboardHookPointer)?

  - by Alex

  GC.KeepAlive() References the specified object, which makes it ineligible for garbage collection from the start of the current routine to the point where this method is called. Not really sure about what GC.KeepAlive does other than simply store a reference so the Garbage Collector doesn't collect the object. But does calling GC.KeepAlive() on an object permanently keep an object from being collected? Or do you have to re-call GC.KeepAlive() every so often (and if so, how often)? I want to keep my keyboard hook alive.

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• Silverlight WCF with two-way SSL security certificates

  - by dlang

  Dear All! I would like to implement a server - client software with the following security requirements: WCF-Services need to be secured with SSL and Certificates for both, the server and the client Client certificates need to be generated programmatically upon user registration Client-certificates are deployed via a an automatically generated installer-package Altough the client-certificates are self-signed (no authorized CA for the generation server) the end-user must not add the server-certificate to the trusted certificates in the local Certificate Store My problems: I cannot find any information regarding establishing such a two-way ssl-security for wcf, while the server-certificate is not signed by an authorized CA and instead is created programmatically with "makecert"... My question: Is it technically possible to implement this requirements? If yes - could you provide some hints how to get started? Thank you!

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• Downloading Video on iPhone using SDK

  - by Vivek Navadia

  Hello All I would like to develop such iphone application that provides functionality to download viedo. i am doing some as below 1) Loading HTML content on web view 2) The loaded html content contains the video link (i.e http://test.com/test.mp4") 3) When i click on that it will play the video in native player. 4) but i would like to prevent this thing and start downloading video from that URL for example, if i click on link it should not open native video player, it should start downloading from that url and store somewhere on iphone (i.e document directory) is there any solution for same? Thanks Vivek

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• Understanding NSHTTPCookieStorage for the iPhone

  - by psychotik

  Maybe I'm missing something, but from Apple's documentation for NSHTTPCookieStorage, I can't help but wonder how this is safe to use. Does this mean that cookie storage is shared across all apps on the iPhone? If my app makes an Http call that results in some cookies being saved, do all apps now have access to these cookies? Methods like: cookiesForURL: Returns all the receiver's cookies that will be sent to a specified URL. make it look even more suspicious. Can someone explain how this is OK, and what the class does? Also, assuming my understanding is flawed and this is indeed sandboxed per-app, do calls made using NSURLRequest automatically save/retrieve cookies from this store or is it the developers responsibility to set request headers before dispatching the request?

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• NSNumberFormatter crashing iPhone SDK 4.0b2

  - by Ward

  Hey there, I've got an app that's been in the app store for a while and functions perfectly on OS 3.1 - 3.13. However, when tested on 4.0b2 I noticed that it crashes in the same place every time, but only on the device, never on the simulator. I'm using a 3GS to test. On loadView I initialize an NSNumberFormatter object which is declared and retained in the interface so I have access to it everywhere. In my method I call it several times to convert string values into nsnumbers to be stored in a mutable dictionary. Here's an example: [myDictionary setObject:[myStyleFormatter numberFromString:@"1"] forKey:@"hours"]; [myDictionary setObject:[myStyleFormatter numberFromString:@"30"] forKey:@"minutes"]; [myDictionary setObject:[myStyleFormatter numberFromString:@"10"] forKey:@"seconds"]; For some reason it crashes as soon as it tries to set hours. The error is "attempt to insert nil value (key: hours)" Have I been doing something wrong all along? Has the api changed for 4.0b2? Thanks, Howie

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• How do I reduce number of redundant requests with mod_perl properly?

  - by rassie

  In a fairly big legacy project, I've refactored several hairy modules into Moose classes. Each of these modules requires database access to (lazy) fetch its attributes. Since those objects are used pretty heavily, I want to reduce the number of redundant requests, for example for unchanged data. Now, how do I do that properly? I've got several alternatives: Implement caching in my Moose classes via a role to store them in memcached with expiration of 5-10 minutes (probably not too difficult, but tricky with lazy attributes) update: KiokuDB could probably help here, have to read up about attributes Migrate to DBIx::Class (needs to be done anyway) and implement caching on this level (DBIC will probably take most of the pain away just by itself) Somehow make my objects persist inside the mod_perl process (no clue how to do this :() How would you do this and what do you consider a sane way? Is caching data preferred on object or the ORM level?

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• AppFabric Cache errors

  - by Joseph

  The AppFabric Cache in our production crashes almost every day, and is highly unstable. The below errors are logged: Microsoft.ApplicationServer.Caching.DataCacheException: ErrorCode:SubStatus:There is a temporary failure. Please retry later. (Sufficient secondaries not present or they are in throttled state.) Microsoft.ApplicationServer.Caching.DataCacheException: ErrorCode:SubStatus:There is a temporary failure. Please retry later. (The request did not find the primary.) AppFabric Caching service crashed.{Lease with external store expired: Microsoft.Fabric.Federation.ExternalRingStateStoreException: Lease already expired at Microsoft.Fabric.Data.ExternalStoreAuthority.UpdateNode(NodeInfo nodeInfo, TimeSpan timeout) at Microsoft.Fabric.Federation.SiteNode.PerformExternalRingStateStoreOperations(Boolean& canFormRing, Boolean isInsert, Boolean isJoining)} Could someone please provide me some inputs? This is a HA enabled cache environment with 3 cache hosts. All of them are running on Windows Server 2008 Enterprise Edition, and the SQL Server is used for config.

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• NSDictionary: convert NSString keys to lowercase to search a string on them

  - by VansFannel

  Hello. I'm developing an iPhone application. I use a NSDictionary to store city's names as key, and population as value. I want to search the keys using lowercase. I've using this: NSDictionary *dict; [dict objectForKey:[[city stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] lowercaseString]]; But, it doesn't work. I know, I can do a for, convert keys to lowercase and compare with city. Is there any other way to do that? Maybe, with a NSDictionary method. UPDATE The NSDictionary is loaded from a property list. Thank you.

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• How to use map/reduce to handle more than 10000 unique keys for grouping in MongoDB?

  - by Magnus Johansson

  I am using MongoDB v1.4 and the mongodb-csharp driver and I try to group on a data store that has more than 10000 keys, so I get this error: assertion: group() can't handle more than 10000 unique keys using c# code like this: Document query = new Document().Append("group", new Document() .Append("key", new Document().Append("myfieldname", true)) .Append("$reduce", new CodeWScope( "function(obj,prev) { prev.count++; }")) .Append("initial", new Document().Append("count", 0)) .Append("ns", "myitems")); I read that I should use map/reduce, but I can't figure out how. Can somebody please shed some light on how to use map/reduce? Or is there any other way to get around this limitation? Thanks.

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• Best way to find updates in xml feed

  - by misterjinx

  Hello all, I have an xml feed that I have to check periodically for updates. The xml consists of many elements and I'm looking to figure it out which is the best (and probably faster) way to find out which elements suffered updates from last time I've checked. What I think of is to check first the lastBuildDate for modifications and if it differs from the previous one to start parse the xml again. This would involve keeping each element with all of its attributes in my database. But each element can have different number of attributes as well as other nested elements. So if it would be to store each element in my database what would be the best way to keep them ? That's why I'm asking for your help :) Thank you.

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• Best practices for combining Lucene.NET and a relational database?

  - by FlySwat

  I'm working on a project where I will have a LOT of data, and it will be searchable by several forms that are very efficiently expressed as SQL Queries, but it also needs to be searched via natural language processing. My plan is to build an index using Lucene for this form of search. My question is that if I do this, and perform a search, Lucene will then return the ID's of matching documents in the index, I then have to lookup these entities from the relational database. This could be done in two ways (That I can think of so far): N amount of queries (Horrible) Pass all the ID's to a stored procedure at once (Perhaps as a comma delimited parameter). This has the downside of being limited to the max parameter size, and the slow performance of a UDF to split the string into a temporary table. I'm almost tempted to mirror everything into lucenes index, so that I can periodicly generate the index from the backing store, but only need to access it for the frontend. Advice?

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• Querying a Cassandra column family for rows that have not been updated in X days

  - by knorv

  I'm moving an existing MySQL based application over to Cassandra. So far finding the equivalent Cassandra data model has been quite easy, but I've stumbled on the following problem for which I'd appreciate some input: Consider a MySQL table holding millions of entities: CREATE TABLE entities ( id INT AUTO_INCREMENT NOT NULL, entity_information VARCHAR(...), entity_last_updated DATETIME, PRIMARY KEY (id), KEY (entity_last_updated) ); The table is regularly queried for entities that need to be updated: SELECT id FROM entities WHERE entity_last_updated IS NULL OR entity_last_updated < DATE_ADD(NOW(), INTERVAL -7*24 HOUR) ORDER BY entity_last_updated ASC; The entities returned by this queries are then updated using the following query: UPDATE entities SET entity_information = ?, entity_last_updated = NOW() WHERE id = ?; What would be the corresponding Cassandra data model that would allow me to store the given information and effectively query the entities table for entities that need to be updated (that is: entities that have not been updated in the last seven days)?

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• Combine multiple JSON files into one; retrieve using jQuery/getJSON()

  - by frankadelic

  I have some jQuery code which retrieves content using getJSON(). There are n JSON files, which are retrieved from the server as needed: /json-content/data0.json /json-content/data1.json /json-content/data2.json etc... Instead, I want to store all the JSON in a single file to reduce the number of HTTP requests needed to retrieve the data. What is the best way to do this? If I concatenate the JSON files together, it no longer works with getJSON(). I would prefer not to transform the JSON data ahead of time, as it is coming from a third party data source. Any suggestions?

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• PHP Session variables not passing across pages

  - by mitch

  Common problem, but I'm stumped. Session variables are passing across pages on my local (localhost) deployment, but not on my (www) host. I use a common includes file for each page with this code: $sessionDomain = "/"; @ini_set("session.cookie_path",$sessionDomain); $sessionName = "ccSID".md5('/store/'); session_name($sessionName); session_start(); I confirmed that the session ID cookie (ccSIDxxxxx...) remains the same across pages in my browser, but session variables don't seem to hold up when changing to a page in a different directory.

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• Filtering by entity key name in Google App Engine on Python

  - by Bemmu

  On Google App Engine to query the data store with Python, one can use GQL or Entity.all() and then filter it. So for example these are equivalent gql = "SELECT * FROM User WHERE age >= 18" db.GqlQuery(gql) and query = User.all() query.filter("age >=", 18) Now, it's also possible to query things by key name. I know that in GQL you do it like this gql = "SELECT * FROM User WHERE __key__ >= Key('User', 'abc')" db.GqlQuery(gql) But how would you now use filter to do the same? query = User.all() query.filter("__key__ >=", ?????)

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• Yahoo authentication

  - by steve

  Hi - I'm playing around with the new yahoo API. I'd like to scrap some dummy data using the following address http://query.yahooapis.com/v1/public/yql?q=desc%20social.updates.search&format=json&diagnostics=true&env=store%3A%2F%2Fdatatables.org%2Falltableswithkeys&callback=cbfunc When I run this I get an authenticaion error (Need to be logged into Yahoo) This is fine obviously for me messing around on the internet. However I'd like to call this from a ruby script. Any ideas how I go about authenticating? I can only seem to find some web enabled version.

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• Entity LINQ on many-to-many got error "LINQ to Entities does not recognize the method 'Boolean Conta

  - by user300992

  I have 2 tables (Users and Roles) they are mapped as Many-to-Many in relational db. When I imported to Entity Data Content, they are still staying as the same relationship. Since they are mapped as Many-To-Many in Entity, I can access Users.RoleCollection or Roles.UserCollection However, when I execute this LINQ query, I got "LINQ to Entities does not recognize the method 'Boolean Contains... method, and this method cannot be translated into a store expression." var result (from a in Users from b in Roles where a.RoleCollection.Contains(b) select a); I think I must did something wrong... please help.

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• Removing Divider Line from UISplitViewController

  - by tilomitra

  Guys, I know a similar question exists but the thread seems to be inactive, and I really would like this question to be answered. It's been annoying me for a few days now. I'm wondering how to remove the divider line between the Master and Detail view in the UISplitViewController. I know its possible to remove/hide/cover it up because I see some apps in the store without that line. I have tried setting backgroundColor to clearColour on my views but to no avail. So SO community, you're my only hope!

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• Localize Currency for iPhone

  - by Meltemi

  I would like my iPhone app to allow the input, display and storage of currency amounts using the appropriate symbol ($, €, £, ¥, etc) for the user. Would NSNumberFormatter do everything I need? What happens when a user switches their locale and these amounts (dollars, yen, etc.) are stored as NSDecimalNumbers. I assume, to be safe, it's necessary to somehow capture the locale at the time of entry and then the currency symbol and store them in my instance along with the NSDecimalNumber ivar so they can be unwrapped and displayed appropriately down the road should the user changed their locale since the time when the item was created? Sorry, I have little localization experience so hoping for a couple quick pointers before diving in. Lastly, any insight on how to you handle this kind of input given the limitations of the iPhone's keyboards?

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• Python and Postgresql

  - by Ian

  Hi all, if you wanted to manipulate the data in a table in a postgresql database using some python (maybe running a little analysis on the result set using scipy) and then wanted to export that data back into another table in the same database, how would you go about the implementation? Is the only/best way to do this to simply run the query, have python store it in an array, manipulate the array in python and then run another sql statement to output to the database? I'm really just asking, is there a more efficient way to deal with the data? Thanks, Ian

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• Tracking unique versions of files with hashes

  - by rwmnau

  I'm going to be tracking different versions of potentially millions of different files, and my intent is to hash them to determine I've already seen that particular version of the file. Currently, I'm only using MD5 (the product is still in development, so it's never dealt with millions of files yet), which is clearly not long enough to avoid collisions. However, here's my question - Am I more likely to avoid collisions if I hash the file using two different methods and store both hashes (say, SHA1 and MD5), or if I pick a single, longer hash (like SHA256) and rely on that alone? I know option 1 has 288 hash bits and option 2 has only 256, but assume my two choices are the same total hash length. Since I'm dealing with potentially millions of files (and multiple versions of those files over time), I'd like to do what I can to avoid collisions. However, CPU time isn't (completely) free, so I'm interested in how the community feels about the tradeoff - is adding more bits to my hash proportionally more expensive to compute, and are there any advantages to multiple different hashes as opposed to a single, longer hash, given an equal number of bits in both solutions?

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