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• Determining failing sectors on portable flash memory

  - by Faxwell Mingleton

  I'm trying to write a program that will detect signs of failure for portable flash memory devices (thumb drives, etc). I have seen tools in the past that are able to detect failing sectors and other kinds of trouble on conventional mechanical hard drives, but I fear that flash memory does not have the same kind of predictable low-level access to the hardware due to the internal workings of the storage. Things like wear-leveling and other block-remapping techniques (to skip over 'dead' sectors?) lead me to believe that determining if a flash drive is failing will be difficult at best, if not impossible (short of having constant read failures and device unmounts). Flash drives at their end-of-life should be easy to detect (constant CRC discrepancies during reads and all-out failure). But what about drives that might be failing early? Are there any tell-tale signs like slower throughput speeds that might indicate a flash drive is going to fail much sooner than normal? Along the lines of detecting potentially bad blocks, I had considered attempting random reads/writes to a file close to or exactly the size of the entire volume, but even then is it possible that the drive might report sizes under its maximum capacity to account for 'dead' blocks? In short, is there any way to circumvent or at least detect (algorithmically or otherwise) the use of block-remapping or other life extension techniques for flash memory? Let me end this question by expressing my uncertainty as to whether or not this belongs on serverfault.com . This is definitely a hardware-related question, but I also desire a software solution - preferably one that I can program myself. If this question is misplaced, I will be happy to migrate it to serverfault - but I do need a programming solution. Please let me know if you need clarification :) Thanks!

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• Doctrine2 ArrayCollection

  - by boosis

  Ok, I have a User entity as follows <?php class User { /** * @var integer * @Id * @Column(type="integer") * @GeneratedValue */ protected $id; /** * @var \Application\Entity\Url[] * @OneToMany(targetEntity="Url", mappedBy="user", cascade={"persist", "remove"}) */ protected $urls; public function __construct() { $this->urls = new \Doctrine\Common\Collections\ArrayCollection(); } public function addUrl($url) { // This is where I have a problem } } Now, what I want to do is check if the User has already the $url in the $urls ArrayCollection before persisting the $url. Now some of the examples I found says we should do something like if (!$this->getUrls()->contains($url)) { // add url } but this doesn't work as this compares the element values. As the $url doesn't have id value yet, this will always fail and $url will be dublicated. So I'd really appreciate if someone could explain how I can add an element to the ArrayCollection without persisting it and avoiding the duplication? Edit I have managed to achive this via $p = function ($key, $element) use ($url) { if ($element->getUrlHash() == $url->getUrlHash()) { return true; } else { return false; } }; But doesn't this still load all urls and then performs the check? I don't think this is efficient as there might be thousands of urls per user.

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• Selenium RC throws sessionsid should not be null exception, phpunit 3.4 bug only?

  - by user342775

  I am looking to migrate my selenium RC tests to using PHPUnit 3.4.12 from PHPUnit 3.3.2 The selenium test will fail with an exception of the following when I use assertTextPresent() PHPUnit_Framework_Exception: Response from Selenium RC server for getLocation(). ERROR Server Exception: sessionId should not be null; has this session been started yet?. For example: public function testSending($browser) { ... $browser->click("send"); $browser->waitForPageToLoad("30000"); $browser->assertTextPresent("text"); } Below is the selenium RC log (running on Windows): 15:40:19.676 INFO - Command request: isTextPresent[text, ] on session 153d03a123c42098711994f43c2db34 15:40:19.691 INFO - Got result: OK,false on session 153d023a123c42098711994f43cdb34 15:40:19.879 INFO - Command request: testComplete[, ] on session 153d023a123c4298711994f43c2db34 15:40:19.879 INFO - Killing Firefox... 15:40:20.269 INFO - Got result: OK on session 153d023a123c42098711994f43c2db34 15:40:20.472 INFO - Command request: getLocation[, ] on session null 15:40:20.472 ERROR - Exception running 'getLocation 'command on session null java.lang.NullPointerException: sessionId should not be null; has this session been started yet? As you can see, the test should have completed as indicated by the "Killing Firefox" bit, but it instead continued to do something else and triggered the getLocation[, ] command which caused the exception. I have tried the same test with PHPUnit 3.3.2 which did not produce this problem - the test would happily end without the getLocation(). Any ideas? thanks

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• perl dynamic path given to 'use lib'

  - by Ed Hyer

  So, my code (Perl scripts and Perl modules) sits in a tree like this: trunk/ util/ process/ scripts/ The 'util' directory has, well, utilities, that things in the 'process/' dir need. They get access like this: use FindBin; use lib "$FindBin::Bin/../util"; use UtilityModule qw(all); That construct doesn't care where you start, as long as you're at the same level in the tree as "util/". But I decided that 'scripts/' was getting too crowded, so I created scripts/scripts1 scripts/scripts2 Now I see that this doesn't work. If I run a script 'trunk/scripts/scripts1/call_script.pl', and it calls '/trunk/process/process_script.pl', then 'process_script.pl' will fail trying to get the routines from UtilityModule(), because the path that FindBin returns is the path of the top-level calling script. The first ten ways I thought of to solve this all involved something like: use lib $path_that_came_from_elsewhere; but that seems to be something Perl doesn't like to do, except via that FindBin trick. I tried some things involving BEGIN{} blocks, but i don't really know what I'm doing there, and will likely just end up refactoring. But if someone has some clever insight into this type of problem, this would be a good chance to earn some points!

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• Java - How to find count of items in a list in another list

  - by David Buckley

  Say I have two lists: List<String>products = new ArrayList<String>(); products.add("computer"); products.add("phone"); products.add("mouse"); products.add("keyboard"); List<String>cart = new ArrayList<String>(); cart.add("phone"); cart.add("monitor"); I need to find how many items in the cart list exist in the products list. For the lists above, the answer would be 1 (as phone is in products and cart). If the cart list was: List<String>cart = new ArrayList<String>(); cart.add("desk"); cart.add("chair"); The result would be 0. If cart contained computer, mouse, desk, chair, the result would be 2 (for computer and mouse). Is there something in the Apache Commons Collections or the Google Collections API? I've looked through them and see ways to get a bag count, but not from another list, although it's possible I'm missing something. Right now, the only way I can think of is to iterate over the cart items and see if products contains the individual item and keep a count. I can't use containsAll as I need the count (not a boolean), and that would fail if all items in cart didn't exist in the product list (which can happen). I'm using Java 1.6 if that matters.

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• Using LINQ in generic collections

  - by Hugo S Ferreira

  Hi, Please consider the following snippet from an implementation of the Interpreter pattern: public override object Execute(Interpreter interpreter, object ctx) { var list = ctx as IEnumerable<string>; return (list != null) ? list.FirstOrDefault() : null; } What about if I want to use the same function for integers? public override object Execute(Interpreter interpreter, object ctx) { var list = ctx as IEnumerable<string>; if (list != null) return list.FirstOrDefault(); var list = ctx as IEnumerable<int>; return (list != null) ? list.FirstOrDefault() : null; } What I wanted was something like: public override object Execute(Interpreter interpreter, object ctx) { var list = ctx as IEnumerable; return (list != null) ? list.FirstOrDefault() : null; } But Linq doesn't act on IEnumerables. Instead, to get to this solution, I would be forced to write something like: public override object Execute(Interpreter interpreter, object ctx) { var list = ctx as IEnumerable; if (list != null) foreach(var i in list) { yield return i; return; } return null; } Or use a generic method: public override T Execute<T>(Interpreter interpreter, object ctx) { var list = ctx as IEnumerable<T>; return (list != null) ? list.FirstOrDefault() : null; } Which would break the Interpreter pattern (as it was implemented in this system). Covariance would also fail (at least in C#3), though would it work, it would be the exact behavior I wanted: public override object Execute(Interpreter interpreter, object ctx) { var list = ctx as IEnumerable<object>; return (list != null) ? list.FirstOrDefault() : null; } So, my question is: what's the best way to achieve the intended behavior? Thanks :-)

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• even PHP has 'bugs' with IE

  - by silversky

  It's not a real bug BUT for sure it is not what you would expect. I have this sample code to upload images: <?php if($type=="image/jpg" || $type=="image/jpeg" || $type=="image/pjpeg" || $type=="image/tiff" || $type=="image/gif" || $type=="image/png") { // make upload else echo "Incorect format ...."; ?> The problem is that that if I modify the extention of an image, let's say to .jpgq or even .jpg% and i try to upload it FF and Chrome will say that the file"s type is "application/octet-stream" and normaly the condition will be false BUT since IE is 'smarter' that other brow. it will say that the file is "image/pjeg and the condition will be true and the file will be uploaded and of course latter any brow. will not be able to read / view the image. It is not a bug because on msdn.microsoft.com it says that: "If the "suggested" (server-provided) MIME type is unknown (not known and not ambiguous), FindMimeFromData immediately returns this MIME type" and "If the server-provided MIME type is either known or ambiguous, the buffer is scanned in an attempt to verify or obtain a MIME type from the actual content." plus others 'inovative solutions from Microsoft'. SO my questions are: Why is IE so 'smart' and when I upload the file to server it knows the real MIME type BUT it will fail to read it from the server ? How can i work around this issue (if the file doesn't have the right extention the condition has to be false)? Is it wise to check the extention format (and not the MIME type)? is any of the above extention not recomended to use ? Should I add others?

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• Jquery validations on form with no fields

  - by jcovert

  I have a table (in a form) populated with radio buttons (with a button for each value in a collection). If the collection is empty, nothing shows up in the table (which is fine). (I'm using Struts2) My trouble comes when validating that the user has selected one of these radio buttons when the submit button is clicked. I'm using JQUERY validations, and it works quite well UNLESS there are no radio buttons to select (collection is empty). $('#startProcessForm').validate({ rules: { selectedProcess: { required: true } }, messages: { selectedProcess: "Please select a process to start." } }); If the list IS empty, then there are no fields (radio button or otherwise) named "selectedProcess". So my question is this: How can I make "selectedProcess" exist AND fail the 'required:true' validation if there's nothing in the collection? I was thinking I could create an empty tag of the same name (selectedProcess) if the collection is empty? Here's what I'd guess would work but doesn't seem to: <s:if test="processes != null && !processes.isEmpty()"> <s:iterator value="processes" status="processesStatus"> <tr> <td><s:radio name="selectedProcess" list="{name}"></s:radio></td> </tr> </s:iterator> </s:if> <s:else> <tr> <td><a name="selectedProcess"></a></td> </tr> </s:else> Thanks!

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• SQL INSTR() using CSV. Need exact match rather than part

  - by Alastair Pitts

  This is a follow up issue relating to the answer for http://stackoverflow.com/questions/2445029/sql-placeholder-in-where-in-issue-inserted-strings-fail Quick background: We have a SQL query that uses a placeholder value to accept a string, which represents a unique tag/id. Usually, this is only a single tag, but we needed the ability to use a csv string for multiple tags, returning a combined result. In the answer we received from the vendor, they suggested the use of the INSTR function, ala: select * from pitotal where tag IN (SELECT tag from pipoint WHERE INSTR(?, tag) <> 0) and time between 'y' and 't' This works perfectly well 99% of the time, the issue is when the tag is also a subset of 2 parts of the CSV string. Eg the placeholder value is: 'northdom,southdom,eastdom,westdom' and possible tags include: north or northdom What happens, as north is a subset of northdom, is that the two tags are return instead of just northdom, which is actually what we want. I'm not strong on SQL so I couldn't work out how to set it as exact, or split the csv string, so help would be appreciated. Is there a way to split the csv string or make it look for an exact match?

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• How to implement Excel Solver functionality in C#?

  - by Vic

  Hi, I have an application in C#, I need to do some optimization calculations, like Excel Solver Add-in does, one option is certainly to write my own solver implementation, but I'm kind of short of time, so I'm looking into libraries that already exist that can help me with this. I've been trying the Microsoft Solver Foundation, which seems pretty neat and cool, the problem is that it doesn't seem to work with the kind of calculations that I need to do. At the end of this question I'm adding the information about the calculations I need to perform and optimize. So basically my question is if any of you know of any other library that I can use for this purpose, or any tutorial that can help to do my own solver, or any idea that gives me a lead to solve this issue. Thanks. Additional Info: This is the data I need to calculate: I have 7 variables, lets call them var1, var2,...,var7 The constraints for these variables are: All of them need to be 0 <= varn <= 0.5 (where n is the number of the variable) The sum of all the variables should be equal to 1 The objective is to maximize the target formula, which in Excel looks like this: (MMULT(TRANSPOSE(L26:L32),M14:M20)) / (SQRT(MMULT(MMULT(TRANSPOSE(L26:L32),M4:S10),L26:L32))) The range that you see in this formula, L26:L32, is actually the range with the variables from above, var1, var2,..., varn. M14:M20 and M4:S10 are ranges with data that I get from different sources, there are more likely decimal values. As I said before, I was using Microsoft Solver Foundation, I modeled pretty much everything with it, I created functions that handle the operations of the target formula, but when I tried to solve the model it always fail, I think it is because of the complexity of the operations. In any case, I just wanted to show these data so you can have an idea about the kind of calculations that I need to implement.

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• Android App Build system differences between Eclipse and Ant?

  - by Amy Winarske

  The Eclipse build for my 1.6 application project is succeeding and the Ant build is failing. I'm looking for help on why they aren't behaving the same way. We are developing on Mac OSX 10.5.8 with Eclipse 3.5 against SDK 1.6 + Google APIs. There are no setting changes in Eclipse, either at workspace or project level. Similarly, our ant is also a vanilla- flavored unmodified installation of 1.7.1. JDK is 1.5.0_22. The CLASSPATH environment variable is not set. JAVA_HOME is /Library/Java/ Home The application was initially created by a team member using the Eclipse plugins. The application references two jar files, one of which has a dependency on javax.xml.bind.annotation.XmlSeeAlso, which is not defined anywhere in our code or in android.jar. The other jar file has an explicit dependency on android.jar. I generated the Ant build file using android update. The Eclipse project builds an apk and runs the application in the emulator. I think this is incorrect behavior. The Android ant project fails to build. I think this is correct behavior. MyClass.java:98: cannot access javax.xml.bind.annotation.XmlSeeAlso [javac] file javax/xml/bind/annotation/XmlSeeAlso.class not found Any ideas as to why the two build methods are behaving differently? I would expect them both to fail. Thanks! -Amy

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• Cannot connect Linux XAMPP PHP to MS SQL database.

  - by Jim

  I've searched many sites without success. I'm using XAMPP 1.7.3a on Ubuntu 9.1. I have used the methods found at http://www.webcheatsheet.com/PHP/connect_mssql_database.php, they all fail. I am able to "connect" with a linked database through MS Access, however, that is not an acceptable solution as not all users will have Access. The first method (at webcheatsheet) uses mssql_connect, et.al. but I get this error from the mssql_connect() call: Warning: mssql_connect() [function.mssql-connect]: Unable to connect to server: [my server] in [my code] [my server] is the server address, I have used both the host name and the IP address. [my code] is a reference to the file and line number in my .php file. Is there a log file somewhere that would have more information about the failure, both on my machine and the MS SQL server? We do not have a bona-fide DBA, so I will need specific information to pass on if the issue seems to be on the server side. All assistance is appreciated, including RTFM when the location of the M is provided! Thanks

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• Filtering Wikipedia's XML dump: error on some accents

  - by streetpc

  I'm trying to index Wikpedia dumps. My SAX parser make Article objects for the XML with only the fields I care about, then send it to my ArticleSink, which produces Lucene Documents. I want to filter special/meta pages like those prefixed with Category: or Wikipedia:, so I made an array of those prefixes and test the title of each page against this array in my ArticleSink, using article.getTitle.startsWith(prefix). In English, everything works fine, I get a Lucene index with all the pages except for the matching prefixes. In French, the prefixes with no accent also work (i.e. filter the corresponding pages), some of the accented prefixes don't work at all (like Catégorie:), and some work most of the time but fail on some pages (like Wikipédia:) but I cannot see any difference between the corresponding lines (in less). I can't really inspect all the differences in the file because of its size (5 GB), but it looks like a correct UTF-8 XML. If I take a portion of the file using grep or head, the accents are correct (even on the incriminated pages, the <title>Catégorie:something</title> is correctly displayed by grep). On the other hand, when I rectreate a wiki XML by tail/head-cutting the original file, the same page (here Catégorie:Rock par ville) gets filtered in the small file, not in the original… Any idea ? Alternatives I tried: Getting the file (commented lines were tried wihtout success): FileInputStream fis = new FileInputStream(new File(xmlFileName)); //ReaderInputStream ris = ReaderInputStream.forceEncodingInputStream(fis, "UTF-8" ); //(custom function opening the stream, reading it as UFT-8 into a Reader and returning another byte stream) //InputSource is = new InputSource( fis ); is.setEncoding("UTF-8"); parser.parse(fis, handler); Filtered prefixes: ignoredPrefix = new String[] {"Catégorie:", "Modèle:", "Wikipédia:", "Cat\uFFFDgorie:", "Mod\uFFFDle:", "Wikip\uFFFDdia:", //invalid char "Catégorie:", "Modèle:", "Wikipédia:", // UTF-8 as ISO-8859-1 "Image:", "Portail:", "Fichier:", "Aide:", "Projet:"}; // those last always work

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• My service does not start on Windows 2008 (it works on Windows 2003)

  - by akirekadu

  When we install our product on Windows 2008 SP2, couple of services fail to start. After trying different things, we figured out that these service were able to start when "Log on as" is set to "Local system account". This service does need to run as a specific user because it requires access to secure resources. The service did run just fine under this special user account under Windows 2003. I am thinking the problem is related to UAC (user access control). Under interactive mode one can elevate permission by answering the security dialog box. How to do the same for a service? How to configure the service so it runs with necessary permissions? Thanks! Couple of notes I would like to add. One solution I tried is to execute the installer as administrator. The service does get installed. However, it creates another problem. An embedded 3rd party product and its files get installed with admin only rights. So we do need to run the installer as logged in user.

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• What fails in this row level trigger?

  - by newba

  I have this trigger: create or replace trigger t_calctotal after insert or update on item_fornecimento REFERENCING NEW AS NEW OLD AS OLD for each row begin if inserting then dbms_output.put_line(' On Insert'); update fornecimento f set f.total_enc_fornec = f.total_enc_fornec +:NEW.prec_total_if where f.id_fornecimento = :NEW.id_fornecimento; else dbms_output.put_line(' On Update'); update fornecimento f set f.total_enc_fornec = f.total_enc_fornec - :OLD.prec_total_if +:NEW.prec_total_if where f.id_fornecimento = :NEW.id_fornecimento; end if; end; Basically I want to refresh the total value of an order (fornecimento), by suming all the items in item_fornecimento; I have to treat this in a different way, case it's an inserting, case it's an updating. The trigger compiles and all and even worked one time, but it was the only one. I've inserted or updated my prec_total_if in item_fornecimento in sqldeveloper, but the order's (fornecimento) total still not change :(. If it's important, my f.total_enc_fornec it's null until it's replaced by a value inserted by this triggers; it prints the output, but it seems to fail updating.

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• Requiring library consumers reference additional assembly when using certain types

  - by Thomas G. Mayfield

  I have library code that uses ICSharpCode.SharpZipLib under the hood to make it easy to use ZIP files as data sources when running integration tests. As it stands, if I reference my library from another project, the other project will compile just fine, but when it accesses the code that uses SharpZipLib, I get an exception for it not finding the zip library: failed: System.IO.FileNotFoundException : Could not load file or assembly 'ICSharpCode.SharpZipLib, Version=0.85.5.452, Culture=neutral, PublicKeyToken=1b03e6acf1164f73' or one of its dependencies. The system cannot find the file specified. If the types in my library derived from a class in SharpZipLib, it'd generate a compile error CS0012. What other ways are there for triggering a CS0012, so that using code that requires SharpZipLib (but doesn't clearly indicate it) would cause consumer code to fail compilation? I've had similar problems in the past when I've used libraries like DeftTech.DuckTyping under the hood. I'd add my library code to a new project, start working, compile, run, and then suddenly hit an edge case that I'd used duck typing to get around and get a runtime error. What I'd most like is to have the same behavior as if I'd derived from a type in the 3rd-party library, so that a reference to my derived type generates a CS0012: The type 'type' is defined in an assembly that is not referenced. You must add a reference to assembly 'assembly'.

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• How to implement or emulate an "abstract" OCUnit test class?

  - by Quinn Taylor

  I have a number of Objective-C classes organized in an inheritance hierarchy. They all share a common parent which implements all the behaviors shared among the children. Each child class defines a few methods that make it work, and the parent class raises an exception for the methods designed to be implemented/overridden by its children. This effectively makes the parent a pseudo-abstract class (since it's useless on its own) even though Objective-C doesn't explicitly support abstract classes. The crux of this problem is that I'm unit testing this class hierarchy using OCUnit, and the tests are structured similarly: one test class that exercises the common behavior, with a subclass corresponding to each of the child classes under test. However, running the test cases on the (effectively abstract) parent class is problematic, since the unit tests will fail in spectacular fashion without the key methods. (The alternative of repeating the common tests across 5 test classes is not really an acceptable option.) The non-ideal solution I've been using is to check (in each test method) whether the instance is the parent test class, and bail out if it is. This leads to repeated code in every test method, a problem that becomes increasingly annoying if one's unit tests are highly granular. In addition, all such tests are still executed and reported as successes, skewing the number of meaningful tests that were actually run. What I'd prefer is a way to signal to OCUnit "Don't run any tests in this class, only run them in its child classes." To my knowledge, there isn't (yet) a way to do that, something similar to a +(BOOL)isAbstractTest method I can implement/override. Any ideas on a better way to solve this problem with minimal repetition? Does OCUnit have any ability to flag a test class in this way, or is it time to file a Radar? Edit: Here's a link to the test code in question. Notice the frequent repetition of if (...) return; to start a method, including use of the NonConcreteClass() macro for brevity.

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• Problem with Unit testing of ASP.NET project (NullReferenceException when running the test)

  - by Alex

  Hi, I'm trying to create a bunch of MS visual studio unit tests for my n-tiered web app but for some reason I can't run those tests and I get the following error - "Object reference not set to an instance of an object" What I'm trying to do is testing of my data access layer where I use LINQ data context class to execute a certain function and return a result,however during the debugging process I found out that all the tests fail as soon as they get to the LINQ data context class and it has something to do with the connection string but I cant figure out what is the problem. The debugging of tests fails here(the second line): public EICDataClassesDataContext() : base(global::System.Configuration.ConfigurationManager.ConnectionStrings["EICDatabaseConnectionString"].ConnectionString, mappingSource) { OnCreated(); } And my test is as follows: TestMethod()] public void OnGetCustomerIDTest() { FrontLineStaffDataAccess target = new FrontLineStaffDataAccess(); // TODO: Initialize to an appropriate value string regNo = "jonh"; // TODO: Initialize to an appropriate value int expected = 10; // TODO: Initialize to an appropriate value int actual; actual = target.OnGetCustomerID(regNo); Assert.AreEqual(expected, actual); } The method which I call from DAL is: public int OnGetCustomerID(string regNo) { using (LINQDataAccess.EICDataClassesDataContext dataContext = new LINQDataAccess.EICDataClassesDataContext()) { IEnumerable<LINQDataAccess.GetCustomerIDResult> sProcCustomerIDResult = dataContext.GetCustomerID(regNo); int customerID = sProcCustomerIDResult.First().CustomerID; return customerID; } } So basically everything fails after it reaches the 1st line of DA layer method and when it tries to instantiate the LINQ data access class... I've spent around 10 hours trying to troubleshoot the problem but no result...I would really appreciate any help! UPDATE: Finally I've fixed this!!!!:) I dont know why but for some reasons in the app.config file the connection to my database was as follows: AttachDbFilename=|DataDirectory|\EICDatabase.MDF So what I did is I just changed the path and instead of |DataDirectory| I put the actual path where my MDF file sits,i.e C:\Users\1\Documents\Visual Studio 2008\Projects\EICWebSystem\EICWebSystem\App_Data\EICDatabase.mdf After I had done that it worked out!But still it's a bit not clear what was the problem...probably incorrect path to the database?My web.config of ASP.NET project contains the |DataDirectory|\EICDatabase.MDF path though..

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• Java to JavaScript (Encryption related)

  - by balexandre

  Hi guys, I'm having difficulties to get the same string in Javascript and I'm thinking that I'm doing something wrong... Java code: import java.io.UnsupportedEncodingException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.Date; import java.util.GregorianCalendar; import sun.misc.BASE64Encoder; private static String getBase64Code(String input) throws UnsupportedEncodingException, NoSuchAlgorithmException { String base64 = ""; byte[] txt = input.getBytes("UTF8"); byte[] text = new byte[txt.length+3]; text[0] = (byte)239; text[1] = (byte)187; text[2] = (byte)191; for(int i=0; i<txt.length; i++) text[i+3] = txt[i]; MessageDigest md = MessageDigest.getInstance("MD5"); md.update(text); byte digest[] = md.digest(); BASE64Encoder encoder = new BASE64Encoder(); base64 = encoder.encode(digest); return base64; } I'm trying this using Paj's MD5 script as well Farhadi Base 64 Encode script but my tests fail completely :( my code: function CalculateCredentialsSecret(type, user, pwd) { var days = days_between(new Date(), new Date(2000, 1, 1)); var str = type.toUpperCase() + user.toUpperCase() + pwd.toUpperCase() + days; var md5 = hex_md5(str); var b64 = base64Encode(md5); return encodeURIComponent(b64); } Does anyone know how can I convert this Java method into a Javascript one? Thank you Tests (for today, 3740 days after January 1st, 2000 var secret = CalculateCredentialsSecret('AAA', 'BBB', 'CCC'); // secret SHOULD be: S3GYAfGWlmrhuoNsIJF94w==

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• Facebook app getting "Warning: fopen......." - Please help!

  - by Poni

  Hello! I'm trying to establish a Facebook application. I'm getting the following PHP notice randomly: Warning: fopen(http://api.facebook.com/restserver.php? … &v=1.0) [function.fopen]: failed to open stream: HTTP request failed! HTTP/1.1 400 Bad Request in D:\projects........\facebookapi_php5_restlib.php on line 3391 As said, it happens randomly. My app configuration: IFrame Page host configuration: Windows Vista, Apache 2.2.11, PHP 5.1 No support for cURL is possible at the moment. My aim: Get the user's first name & pic_square along with two other preferences. If these two preferences are not set then I'll set them, after doing some internal job. I understand that the REST API is old. Which interface should I use then? Saw FQL, which seem to be fine, but I see no corresponding getUserPreference/setUserPreference interface. Where is it? How do I combine it with the "first name & pic_square" info that I need in one query? How do I read the results of multi-query query? Also, if I understand correctly, the FQL is also executed with the fopen() function, and as we see here it might fail. That means something went wrong, and then I want to handle it. Any suggestions how to do so efficiently? Less important than the above question though. Thank you all.

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• Silently catch windows error popups when calling System.load() in java

  - by Marcelo Morales

  I have a Java Swing application, which needs to load some native libraries in windows. The problem is that the client could have different versions of those libraries. In one recent version, either the names changed or the order on which the libraries must be loaded changed. To keep up, we iterated over all possible library names but some fail to load (due to it's nonexistence or because another must be loaded previously). This idea works on older Windows but on latter ones it shows a error popup. I saw on question 4058303 (Silently catch windows error popups when calling LoadLibrary) that I need to call SetErrorMode but I am not sure how to call SetErrorMode from jna. I tried to follow the idea from question 11038595 but I am not sure how to proceed. public interface CKernel32 extends Kernel32 { CKernel32 INSTANCE = (CKernel32) Native.loadLibrary("kernel32", CKernel32.class); // TODO: HELP: HOW define the SetErrorMode function } How do I define (from the SetErrorMode documentation): UINT WINAPI SetErrorMode( _In_ UINT uMode ); in the line marked as TODO: HELP:? Thanks in advance

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• MediaRecorder Prepare Failed

  - by AndyTang

  Hi, I'm new here. I have been trying to create a video capture app using the android emulator without much success. As far as I know and looking through all the samples and code on the internet (this site and others), I must still be missing a step. I've tried using this sample near the end of this thread made by JonPro: http://www.anddev.org/viewtopic.php?p=24723#24723 and I've tried making my own but the media recorder would always fail on the prepare stage with the most unhelpful message of 'prepare failed'. I have no clue what I am missing. I seem to have the correct permissions and a SDCard is mounted according to the emulator. Should I be using a android SDK version other than 2.1? Even though the code in that forum claims to work, I figured out that this line was missing: recorder.setCamera(camera); But still no joy as the logs shows that: 'Failed to get camera(0x16b70) parameters' when prepare() is called but it still doesn't make sense as the preview is okay, but no recording! Any help or suggestions will be appreciated.

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• Looking for merge tool with very good in-line-comparison support

  - by peter p

  I have seen this topic discussed several times, but emphasis is on "very good in-line-comparison" here, which was not really covered by those threads. E.g. I would like the tool to recognize and highlight that the resource "colorpicker_newstring" has been added when comparing the following two blocks. WinMerge and Kdiff both fail... Does anyone know a software that does not? I am using Windows. Ah, and I'd prefer free/OS software, of course. Thanks a lot in advance, Peter File A: <resource name="colorpicker_title">Color picker</resource> <resource name="colorpicker_apply">Apply</resource> <resource name="colorpicker_transparent">Transparent</resource> <resource name="colorpicker_htmlcolor">HTML color</resource> <resource name="colorpicker_red">Red</resource> <resource name="colorpicker_newstring">New String</resource> <resource name="colorpicker_green">Green</resource> <resource name="colorpicker_blue">Blue</resource> <resource name="colorpicker_alpha">Alpha</resource> <resource name="colorpicker_recentcolors">Recently used colors</resource> File B: <resource name="colorpicker_title">Sélecteur de couleur</resource> <resource name="colorpicker_apply">Appliquer</resource> <resource name="colorpicker_transparent">Transparent</resource> <resource name="colorpicker_htmlcolor">Couleur HTML</resource> <resource name="colorpicker_red">Rouge</resource> <resource name="colorpicker_green">Vert</resource> <resource name="colorpicker_blue">Bleu</resource> <resource name="colorpicker_alpha">Alpha</resource> <resource name="colorpicker_recentcolors">Couleurs récentes</resource>

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• How do you deal with denormalization / secondary indexes in database sharding?

  - by Continuation

  Say I have a "message" table with 2 secondary indexes: "recipient_id" "sender_id" I want to shard the "message" table by "recipient_id". That way to retrieve all messages sent to a certain recipient I only need to query one shard. But at the same time, I want to be able to make a query that ask for all messages sent by a certain sender. Now I don't want to send that query to every single shard of the "message" table. One way to do this is to duplicate the data and have a "message_by_sender" table sharded by "sender_id". The problem with that approach is that every time a message has been sent, I need to insert the message into both "message" and "message_by_sender" tables. But what if after inserting into "message" the insertion into "message_by_sender" fail? In that case the message exists in "message" but not in "message_by_sender". How do I make sure that if a message exists in "message" then it also exists in "message_by_sender" without resorting to 2 phase commit? This must be a very common issue for anyone who shards their databases. How do you deal woth it?

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• Getting Safari document title/location with Scripting Bridge does not work in full-screen mode

  - by Mark

  I'm trying to get the URL and document title from the topmost Safari document/tab. I have an AppleScript and an objective-c version using Apple's Scripting Bridge framework. Both versions work fine for most web pages, however when I open a Youtube video in full-screen mode, the Scripting Bridge based version fails. The Apple Script works fine for "normal" and full-screen Safari windows. Can anyone see what is wrong with the Scripting Bridge code below to cause it to fail for full-screen Safari windows? Here the code (I omitted error checking for brevity): AppleScript: tell application "Safari" # Give us some time to open video in full-screen mode delay 10 do JavaScript "document.title" in document 0 end tell Scripting Bridge: SafariApplication* safari = [SBApplication applicationWithBundleIdentifier:@"com.apple.Safari"]; SBElementArray* windows = [safari windows]; SafariTab* currentTab = [[windows objectAtIndex: 0] currentTab]; // This fails when in full-screen mode: id result = [safari doJavaScript: @"document.title" in: currentTab]; NSLog(@"title: %@", result); Scripting Bridge error (with added line breaks): Apple event returned an error. Event = 'sfri'\'dojs'{ '----':'utxt'("document.title"), 'dcnm':'obj '{ 'want':'prop', 'from':'obj '{ 'want':'cwin', 'from':'null'(), 'form':'indx', 'seld':1 }, 'form':'prop', 'seld':'cTab' } } Error info = { ErrorNumber = -1728; ErrorOffendingObject = <SBObject @0x175c2de0: currentTab of SafariWindow 0 of application "Safari" (238)>; } I could not find details about the given error code. It complains about 'currentTab' which shows that the JavaScript event at least made it all the way to Safari. I assume that the current tab receives the event, but refuses to run the JS code, because it is in full-screen mode. However, why does this work for an AppleScript? Don't they use the same code path eventually? Any suggestions are greatly appreciated. Thanks!

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