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• Generic software code style enforcer

  - by FuzziBear

  It seems to me to be a fairly common thing to do, where you have some code that you'd like to automatically run through a code style tool to catch when people break your coding style guide(s). Particularly if you're working on code that has multiple languages (which is becoming more common with web-language-x and javascript), you generally want to apply similar code style guides to both and have them enforced. I've done a bit of research, but I've only been able to find tools to enforce code style guidelines (not necessarily applying the code style, just telling you when you break code style guidelines) for a particular language. It would seem to me a reasonably trivial thing to do by just using current IDE rules for syntax highlighting (so that you don't check style guide rules inside quotes or strings, etc) and a whole lot of regexes to enforce some really generic things. Examples: if ( rather than if( checking lines with only whitespace Are there any tools that do this kind of really generic style checking? I'd prefer it to be easily configurable for different languages (because like it or not, some things would just not work cross language) and to add new "rules" to check new things.

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• How to refactor a myriad of similar classes

  - by TobiMcNamobi

  I'm faced with similar classes A1, A2, ..., A100. Believe it or not but yeah, there are roughly hundred classes that almost look the same. None of these classes are unit tested (of course ;-) ). Each of theses classes is about 50 lines of code which is not too much by itself. Still this is way too much duplicated code. I consider the following options: Writing tests for A1, ..., A100. Then refactor by creating an abstract base class AA. Pro: I'm (near to totally) safe by the tests that nothing goes wrong. Con: Much effort. Duplication of test code. Writing tests for A1, A2. Abstracting the duplicated test code and using the abstraction to create the rest of the tests. Then create AA as in 1. Pro: Less effort than in 1 but maintaining a similar degree of safety. Con: I find generalized test code weird; it often seems ... incoherent (is this the right word?). Normally I prefer specialized test code for specialized classes. But that requires a good design which is my goal of this whole refactoring. Writing AA first, testing it with mock classes. Then inheriting A1, ..., A100 successively. Pro: Fastest way to eliminate duplicates. Con: Most Ax classes look very much the same. But if not, there is the danger of changing the code by inheriting from AA. Other options ... At first I went for 3. because the Ax classes are really very similar to each other. But now I'm a bit unsure if this is the right way (from a unit testing enthusiast's perspective).

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• Legacy Code Retreat Questions

  - by MarkPearl

  I recently heard of the concept of a Legacy Code Retreat. Since I have attended and helped facilitate some normal Code Retreats I thought it might be interesting in trying a Legacy Code Retreat, but I have a few questions on how a legacy CR differs from a normal one. If anyone has attended a Legacy CR and has some suggestions on how best to host these event’s please leave a comment on what has worked for you in the past or if you have any answers to my questions below… Should you restrict the languages that people can do the sessions in? In the normal CR’s I have been involved in the past we have had people attend and code in their programming language of choice. A normal CR lends itself to  this because each session starts with no code. With a legacy CR each session seems to start with an existing code base. Is there some sort of limitation on the languages that people can work in during the sessions? If not, how do you give them a base to start from? What happens as the beginning of each session? In the normal CR that I have attended each session would have a constraint set on it – i.e. no if statements used, no primitives, etc. With a legacy CR it seems more like patterns for refactoring are learned. Does the facilitator explain the pattern used before the session starts or are they just given a code base to start from and an objective to achieve

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• Mechanics of reasoning during programming interviews

  - by user129506

  This is not the usual "I don't want to write code during an interview", in this question the assumption is that I need to write code during an interview (think about the level of rewriting the quicksort or mergesort from scratch) I know how the algorithm work or I have a basic idea of how I should start working from there, i.e. I don't remember the algorithm by heart I noticed that even on a whiteboard, I always end up writing bugged code or code that doesn't compile. If there's a typo, whatever I usually live with that.. but when there's a crash due to some uncaught particular case I end up losing confidence in my skills. I realize that perhaps interviewers might want to look at how I write code and/or how I solve problems rather than proof-compiling my whiteboard code, but I'd like to ask how should I approach the above problem in mental terms, i.e. what mental steps should I follow when writing code for an interview with the two bullet points above. There must be a unique and agreed series of steps I should follow to avoid getting stuck/caught into particular exception cases (limit cases) that might end up wasting my time and my energies rather than focusing on the overall algorithm for the general case. I hope I made my point clear

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• Invariant code contracts – using class-wide contracts

  - by DigiMortal

  It is possible to define invariant code contracts for classes. Invariant contracts should always hold true whatever member of class is called. In this posting I will show you how to use invariant code contracts so you understand how they work and how they should be tested. This is my randomizer class I am using to demonstrate code contracts. I added one method for invariant code contracts. Currently there is one contract that makes sure that random number generator is not null. public class Randomizer {     private IRandomGenerator _generator;       private Randomizer() { }       public Randomizer(IRandomGenerator generator)     {         _generator = generator;     }       public int GetRandomFromRangeContracted(int min, int max)     {         Contract.Requires<ArgumentOutOfRangeException>(             min < max,             "Min must be less than max"         );           Contract.Ensures(             Contract.Result<int>() >= min &&             Contract.Result<int>() <= max,             "Return value is out of range"         );           return _generator.Next(min, max);     }       [ContractInvariantMethod]     private void ObjectInvariant()     {         Contract.Invariant(_generator != null);     } } Invariant code contracts are define in methods that have ContractInvariantMethod attribute. Some notes: It is good idea to define invariant methods as private. Don’t call invariant methods from your code because code contracts system does not allow it. Invariant methods are defined only as place where you can keep invariant contracts. Invariant methods are called only when call to some class member is made! The last note means that having invariant method and creating Randomizer object with null as argument does not automatically generate exception. We have to call at least one method from Randomizer class. Here is the test for generator. You can find more about contracted code testing from my posting Code Contracts: Unit testing contracted code. There is also explained why the exception handling in test is like it is. [TestMethod] [ExpectedException(typeof(Exception))] public void Should_fail_if_generator_is_null() {     try     {         var randomizer = new Randomizer(null);         randomizer.GetRandomFromRangeContracted(1, 4);     }     catch (Exception ex)     {         throw new Exception(ex.Message, ex);     } } Try out this code – with unit tests or with test application to see that invariant contracts are checked as soon as you call some member of Randomizer class.

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• Using Supermicro IPMI behind a Proxy?

  - by Stefan Lasiewski

  This is a SuperMicro server with a X8DT3 motherboard which contains an On-board IPMI BMC. In this case, the BMC is a Winbond WPCM450). I believe many Dell servers use this a similar BMC model. A common practice with IPMI is to isolated it to a private, non-routable network. In our case all IPMI cards are plugged into a private management LAN at 192.168.1.0/24 which has no route to the outside world. If I plug my laptop into the 192.168.1.0/24 network, I can verify that all IPMI features work as expected, including the remote console. I need to access all of the IPMI features from a different network, over some sort of encrypted connection. I tried SSH port forwarding. This works fine for a few servers, however, we have close to 100 of these servers and maintaining a SSH client configuration to forward 6 ports on 100 servers is impractical. So I thought I would try a SOCKS proxy. This works, but it seems that the Remote Console application does not obey my systemwide proxy settings. I setup a SOCKS proxy. Verbose logging allows me to see network activity, and if ports are being forwarded. ssh -v -D 3333 [email protected] I configure my system to use the SOCKS proxy. I confirm that Java is using the SOCKS proxy settings. The SOCKS proxy is working. I connect to the BMC at http://192.168.1.100/ using my webbrowser. I can log in, view the Server Health, power the machine on or off, etc. Since SSH verbose logging is enabled, I can see the progress. Here's where it get's tricky: I click on the "Launch Console" button which downloads a file called jviewer.jnlp. JNLP files are opened with Java Web Start. A Java window opens. The titlebar says says "Redirection Viewer" in the title bar. There are menus for "Video" "Keyboard" "Mouse", etc. This confirms that Java is able to download the application through the proxy, and start the application. 60 seconds later, the application times out and simply says "Error opening video socket". Here's a screenshot. If this worked, I would see a VNC-style window. My SSH logs show no connection attempts to ports 5900/5901. This suggests that the Java application started the VNC application, but that the VNC application ignores the systemwide proxy settings and is thus unable to connect to the remote host. Java seems to obey my systemwide proxy settings, but this VNC application seems to ignore it. Is there any way for me to force this VNC application to use my systemwide proxy settings?

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• OpenLDAP mirror mode replication failing with TLS behind a load balancer

  - by Lynn Owens

  I have two OpenLDAP servers that are both running TLS. They are: ldap1.mydomain.com ldap2.mydomain.com I also have a load balancer cluster with a dns name of it's own: ldap.mydomain.com The SSL certificate has a CN of ldap.mydomain.com, with SANs of ldap1.mydomain.com and ldap2.mydomain.com. Everything works... Except mirror mode replication. My mirror mode replication is setup like this: ldap.conf TLS_REQCERT allow cn=config.ldif olcServerID: 1 ldap://ldap1.mydomain.com olcServerID: 2 ldap://ldap2.mydomain.com On ldap1, olcDatabase{1}hdb.ldif olcMirrorMode: TRUE olcSyncrepl: {0}rid=001 provider=ldap://ldap2.mydomain.com bindmethod=simple bindmethod=simple binddn="cn=me,dc=mydomain,dc=com" credentials="REDACTED" starttls=yes searchbase="dc=mydomain,dc=com" schemachecking=on type=refreshAndPersist retry="60 +" On ldap2, olcDatabase{1}hdb.ldif olcMirrorMode: TRUE olcSyncrepl: {0}rid=001 provider=ldap://ldap1.mydomain.com bindmethod=simple bindmethod=simple binddn="cn=me,dc=mydomain,dc=com" credentials="REDACTED" starttls=yes searchbase="dc=mydomain,dc=com" schemachecking=on type=refreshAndPersist retry="60 +" Here's the errors I'm getting in syslog: Dec 1 21:05:01 ldap1 slapd[6800]: slap_client_connect: URI=ldap://ldap2.mydomain.com DN="cn=me,dc=mydomain,dc=com" ldap_sasl_bind_s failed (-1) Dec 1 21:05:01 ldap1 slapd[6800]: do_syncrepl: rid=001 rc -1 retrying Dec 1 21:05:08 ldap1 slapd[6800]: conn=1111 fd=20 ACCEPT from IP=ldap.mydomain.com:2295 (IP=ldap1.mydomain.com:636) Dec 1 21:05:08 ldap1 slapd[6800]: conn=1111 fd=20 closed (TLS negotiation failure) Any ideas? I've been working on OpenLdap for way too long now.

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• Class-Level Model Validation with EF Code First and ASP.NET MVC 3

  - by ScottGu

  Earlier this week the data team released the CTP5 build of the new Entity Framework Code-First library.  In my blog post a few days ago I talked about a few of the improvements introduced with the new CTP5 build.  Automatic support for enforcing DataAnnotation validation attributes on models was one of the improvements I discussed.  It provides a pretty easy way to enable property-level validation logic within your model layer. You can apply validation attributes like [Required], [Range], and [RegularExpression] – all of which are built-into .NET 4 – to your model classes in order to enforce that the model properties are valid before they are persisted to a database.  You can also create your own custom validation attributes (like this cool [CreditCard] validator) and have them be automatically enforced by EF Code First as well.  This provides a really easy way to validate property values on your models.  I showed some code samples of this in action in my previous post. Class-Level Model Validation using IValidatableObject DataAnnotation attributes provides an easy way to validate individual property values on your model classes.  Several people have asked - “Does EF Code First also support a way to implement class-level validation methods on model objects, for validation rules than need to span multiple property values?”  It does – and one easy way you can enable this is by implementing the IValidatableObject interface on your model classes. IValidatableObject.Validate() Method Below is an example of using the IValidatableObject interface (which is built-into .NET 4 within the System.ComponentModel.DataAnnotations namespace) to implement two custom validation rules on a Product model class.  The two rules ensure that: New units can’t be ordered if the Product is in a discontinued state New units can’t be ordered if there are already more than 100 units in stock We will enforce these business rules by implementing the IValidatableObject interface on our Product class, and by implementing its Validate() method like so: The IValidatableObject.Validate() method can apply validation rules that span across multiple properties, and can yield back multiple validation errors. Each ValidationResult returned can supply both an error message as well as an optional list of property names that caused the violation (which is useful when displaying error messages within UI). Automatic Validation Enforcement EF Code-First (starting with CTP5) now automatically invokes the Validate() method when a model object that implements the IValidatableObject interface is saved.  You do not need to write any code to cause this to happen – this support is now enabled by default. This new support means that the below code – which violates one of our above business rules – will automatically throw an exception (and abort the transaction) when we call the “SaveChanges()” method on our Northwind DbContext: In addition to reactively handling validation exceptions, EF Code First also allows you to proactively check for validation errors.  Starting with CTP5, you can call the “GetValidationErrors()” method on the DbContext base class to retrieve a list of validation errors within the model objects you are working with.  GetValidationErrors() will return a list of all validation errors – regardless of whether they are generated via DataAnnotation attributes or by an IValidatableObject.Validate() implementation.  Below is an example of proactively using the GetValidationErrors() method to check (and handle) errors before trying to call SaveChanges(): ASP.NET MVC 3 and IValidatableObject ASP.NET MVC 2 included support for automatically honoring and enforcing DataAnnotation attributes on model objects that are used with ASP.NET MVC’s model binding infrastructure.  ASP.NET MVC 3 goes further and also honors the IValidatableObject interface.  This combined support for model validation makes it easy to display appropriate error messages within forms when validation errors occur.  To see this in action, let’s consider a simple Create form that allows users to create a new Product: We can implement the above Create functionality using a ProductsController class that has two “Create” action methods like below: The first Create() method implements a version of the /Products/Create URL that handles HTTP-GET requests - and displays the HTML form to fill-out.  The second Create() method implements a version of the /Products/Create URL that handles HTTP-POST requests - and which takes the posted form data, ensures that is is valid, and if it is valid saves it in the database.  If there are validation issues it redisplays the form with the posted values.  The razor view template of our “Create” view (which renders the form) looks like below: One of the nice things about the above Controller + View implementation is that we did not write any validation logic within it.  The validation logic and business rules are instead implemented entirely within our model layer, and the ProductsController simply checks whether it is valid (by calling the ModelState.IsValid helper method) to determine whether to try and save the changes or redisplay the form with errors. The Html.ValidationMessageFor() helper method calls within our view simply display the error messages our Product model’s DataAnnotations and IValidatableObject.Validate() method returned.  We can see the above scenario in action by filling out invalid data within the form and attempting to submit it: Notice above how when we hit the “Create” button we got an error message.  This was because we ticked the “Discontinued” checkbox while also entering a value for the UnitsOnOrder (and so violated one of our business rules).  You might ask – how did ASP.NET MVC know to highlight and display the error message next to the UnitsOnOrder textbox?  It did this because ASP.NET MVC 3 now honors the IValidatableObject interface when performing model binding, and will retrieve the error messages from validation failures with it. The business rule within our Product model class indicated that the “UnitsOnOrder” property should be highlighted when the business rule we hit was violated: Our Html.ValidationMessageFor() helper method knew to display the business rule error message (next to the UnitsOnOrder edit box) because of the above property name hint we supplied: Keeping things DRY ASP.NET MVC and EF Code First enables you to keep your validation and business rules in one place (within your model layer), and avoid having it creep into your Controllers and Views.  Keeping the validation logic in the model layer helps ensure that you do not duplicate validation/business logic as you add more Controllers and Views to your application.  It allows you to quickly change your business rules/validation logic in one single place (within your model layer) – and have all controllers/views across your application immediately reflect it.  This help keep your application code clean and easily maintainable, and makes it much easier to evolve and update your application in the future. Summary EF Code First (starting with CTP5) now has built-in support for both DataAnnotations and the IValidatableObject interface.  This allows you to easily add validation and business rules to your models, and have EF automatically ensure that they are enforced anytime someone tries to persist changes of them to a database.  ASP.NET MVC 3 also now supports both DataAnnotations and IValidatableObject as well, which makes it even easier to use them with your EF Code First model layer – and then have the controllers/views within your web layer automatically honor and support them as well.  This makes it easy to build clean and highly maintainable applications. You don’t have to use DataAnnotations or IValidatableObject to perform your validation/business logic.  You can always roll your own custom validation architecture and/or use other more advanced validation frameworks/patterns if you want.  But for a lot of applications this built-in support will probably be sufficient – and provide a highly productive way to build solutions. Hope this helps, Scott P.S. In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu

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• WebDav rename fails on an Apache mod_dav install behind NginX

  - by The Daemons Advocate

  I'm trying to solve a problem with renaming files over WebDav. Our stack consists of a single machine, serving content through Nginx, Varnish and Apache. When you try to rename a file, the operation fails with the stack that we're currently using. To connect to WebDav, a client program must: Connect over https://host:443 to NginX NginX unwraps and forwards the request to a Varnish server on http://localhost:81 Varnish forwards the request to Apache on http://localhost:82, which offers a session via mod_dav Here's an example of a failed rename: $ cadaver https://webdav.domain/ Authentication required for Webdav on server `webdav.domain': Username: user Password: dav:/> cd sandbox dav:/sandbox/> mkdir test Creating `test': succeeded. dav:/sandbox/> ls Listing collection `/sandbox/': succeeded. Coll: test 0 Mar 12 16:00 dav:/sandbox/> move test newtest Moving `/sandbox/test' to `/sandbox/newtest': redirect to http://webdav.domain/sandbox/test/ dav:/sandbox/> ls Listing collection `/sandbox/': succeeded. Coll: test 0 Mar 12 16:00 For more feedback, the WebDrive windows client logged an error 502 (Bad Gateway) and 303 (?) on the rename operation. The extended logs gave this information: Destination URI refers to different scheme or port (https://hostname:443) (want: http://hostname:82). Some other Restrictions: Investigations into NginX's Webdav modules show that it doesn't really fit our needs, and forwarding webdav traffic to Apache isn't an option because we don't want to enable Apache SSL. Are there any ways to trick mod_dav to forward to another host? I'm open to ideas :).

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• Convert HTML template (HTML Code) into an image using php library [on hold]

  - by user2727841

  I'm taking input from user through tiny mce editor which is actually html template (HTML Code) and i want to convert that html template (code) into an image using php libaray, How to do it? Is there any API (SDK) OR library for it? well I prefered API (SDK) OR library which actually convert html template (code) into an image... I've searched every where but didn't succeed, now can any one tell me any php library which convert html code into an image... Thanks in advance

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• Mac OS X behind OpenLDAP and Samba

  - by Sam Hammamy

  I have been battling for a week now to get my Mac (Mountain Lion) to authenticate on my home network's OpenLDAP and Samba. From several sources, like the Ubuntu community docs, and other blogs, and after a hell of a lot of trial and error and piecing things together, I have created a samba.ldif that will pass the smbldap-populate when combined with apple.ldif and I have a fully functional OpenLDAP server and a Samba PDC that uses LDAP to authenticate the OS X Machine. The problem is that when I login, the home directory is not created or pulled from the server. I get the following in system.log Sep 21 06:09:15 Sams-MacBook-Pro.local SecurityAgent[265]: User info context values set for sam Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_authenticate(): Got user: sam Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_authenticate(): Got ruser: (null) Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_authenticate(): Got service: authorization Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in od_principal_for_user(): no authauth availale for user. Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in od_principal_for_user(): failed: 7 Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_authenticate(): Failed to determine Kerberos principal name. Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_authenticate(): Done cleanup3 Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_authenticate(): Kerberos 5 refuses you Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_authenticate(): pam_sm_authenticate: ntlm Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_acct_mgmt(): OpenDirectory - Membership cache TTL set to 1800. Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in od_record_check_pwpolicy(): retval: 0 Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_setcred(): Establishing credentials Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_setcred(): Got user: sam Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_setcred(): Context initialised Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_setcred(): pam_sm_setcred: ntlm user sam doesn't have auth authority All that's great and good and I authenticate. Then I get CFPreferences: user home directory for user kCFPreferencesCurrentUser at /Network/Servers/172.17.148.186/home/sam is unavailable. User domains will be volatile. Failed looking up user domain root; url='file://localhost/Network/Servers/172.17.148.186/home/sam/' path=/Network/Servers/172.17.148.186/home/sam/ err=-43 uid=9000 euid=9000 If you're wondering where /Network/Servers/IP/home/sam comes from, it's from a couple of blogs that said the OpenLDAP attribute apple-user-homeDirectory should have that value and the NFSHomeDirectory on the mac should point to apple-user-homeDirectory I also set the attr apple-user-homeurl to <home_dir><url>smb://172.17.148.186/sam/</url><path></path></home_dir> which I found on this forum. Any help is appreciated, because I'm banging my head against the wall at this point. By the way, I intend to create a blog on my vps just for this, and create an install script in python that people can download so no one has to go through what I've had to go through this week :) After some sleep I am going to try to login from a windows machine and report back here. Thanks Sam

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• Reality behind wireless security - the weakness of encrypting

  - by Cawas

  I welcome better key-wording here, both on tags and title, and I'll add more links as soon as possible. For some years I'm trying to conceive a wireless environment that I'd setup anywhere and advise for everyone, including from big enterprises to small home networks of 1 machine. I've always had the feeling using any kind of the so called "wireless security" methods is actually a bad design. I'm talking mostly about encrypting and pass-phrasing (which are actually two different concepts), since I won't even considering hiding SSID and mac filtering. I understand it's a natural way of thinking. With cable networking nobody can access the network unless they have access to the physical cable, so you're "secure" in the physical way. In a way, encrypting is for wireless what walling (building walls) is for the cables. And giving pass-phrases is adding a door with a key. But the cabling without encryption is also insecure. Someone just need to plugin and get your data! And while I can see the use for encrypting data, I don't think it's a security measure in wireless networks. As I said elsewhere, I believe we should encrypt only sensitive data regardless of wires. And passwords should be added to the users, always, not to wifi. For securing files, truly, best solution is backup. Sure all that doesn't happen that often, but I won't consider the most situations where people just don't care. I think there are enough situations where people actually care on using passwords on their OS users, so let's go with that in mind. For being able to break the walls or the door someone will need proper equipment such as a hammer or a master key of some kind. Same is true for breaking the wireless walls in the analogy. But, I'd say true data security is at another place. I keep promoting the Fonera concept as an instance. It opens up a free wifi port, if you choose so, and anyone can connect to the internet through that, without having any access to your LAN. It also uses a QoS which will never let your bandwidth drop from that public usage. That's security, and it's open. And who doesn't want to be able to use internet freely anywhere you can find wifi spots? I have 3G myself, but that's beyond the point here. If I have a wifi at home I want to let people freely use it for internet as to not be an hypocrite and even guests can easily access my files, just for reading access, so I don't need to keep setting up encryption and pass-phrases that are not whole compatible. I'll probably be bashed for promoting the non-usage of WPA 2 with AES or whatever, but I wanted to know from more experienced (super) users out there: what do you think? Is there really a need for encryption to have true wireless security?

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• Debugging OWB generated SAP ABAP code executed through RFC

  - by Anil Menon

  Within OWB if you need to execute ABAP code using RFC you will have to use the SAP Function Module RFC_ABAP_INSTALL_AND_RUN. This function module is specified during the creation of the SAP source location. Usually in a Production environment a copy of this function module is used due to security restrictions. When you execute the mapping by using this Function Module you can’t see the actual ABAP code that is passed on to the SAP system. In case you want to take a look at the code that will be executed on the SAP system you need to use a custom Function Module in SAP. The easiest way to do this is to make a copy of the Function Module RFC_ABAP_INSTALL_AND_RUN and call it say Z_TEST_FM. Then edit the code of the Function Module in SAP as below FUNCTION Z_TEST_FM . DATA: BEGIN OF listobj OCCURS 20. INCLUDE STRUCTURE abaplist. DATA: END OF listobj. DATA: begin_of_line(72). DATA: line_end_char(1). DATA: line_length type I. DATA: lin(72). loop at program. append program-line to WRITES. endloop. ENDFUNCTION. Within OWB edit the SAP Location and use Z_TEST_FM as the “Execution Function Module” instead of  RFC_ABAP_INSTALL_AND_RUN. Then register this location. The Mapping you want to debug will have to be deployed. After deployment you can right click the mapping and click on “Start”.   After clicking start the “Input Parameters” screen will be displayed. You can make changes here if you need to. Check that the parameter BACKGROUND is set to “TRUE”. After Clicking “OK” the log for the execution will be displayed. The execution of Mappings will always fail when you use the above function module. Clicking on the icon “I” (information) the ABAP code will be displayed.   The ABAP code displayed is the code that is passed through the Function Module. You can also find the code by going through the log files on the server which hosts the OWB repository. The logs will be located under <OWB_HOME>/owb/log. Patch #12951045 is recommended while using the SAP Connector with OWB 11.2.0.2. For recommended patches for other releases please check with Oracle Support at http://support.oracle.com

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• Setup IPsec VPN using ASA5505 behind Juniper SSG5

  - by i_ch3ry

  I have been assigned to establish a Internet IPsecVPN connection between two sites using Cisco ASA5505 A site currently has following setup.(Same setup is expected in another site) Internet-----ADSL Router-----Juniper SSG5-----Intranet (Im not sure what is configured on SSG5 and if router is in bridge mode or if NAT is configured) I was thinking if I should install ASA5505 along with Juniper SSG5? Internet-----ADSL Router-----Juniper SSG5-----Cisco ASA5505(for vpn only)------Intranet or Internet-----ADSL Router-----Cisco ASA5505(for vpn only)-----Juniper SSG5------Intranet My question is if it is possible? What should be the normal way to achieve this goal? Thanks

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• Internet Sharing on Mac Behind Proxy

  - by Ali Kazmi

  Hi, I have enabled the internet sharing via Airport on Mac mini successfully. I can connect to the Wifi network from my iPhone but can't browse the internet. The problem might be that the Mac mini uses a proxy to connect to the internet. Is there a way to make this work?

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• CheckPoint VPN-1 SecureClient inability to navigate behind a Linksys WAG300N

  - by AndreaTrasatti

  I have a Linksys WAG300N, I'm accessing my LAN with Wifi and everything works fine on my Windows 7 Enterprise laptop. When I try to connect to my company's VPN the connection succeeds, but I cannot access any internet site either within my work network or public site like Yahoo or Google. In my Linksys control panel I already verified all types of VPNs are enable to passthrough. Normal IPSec and Windows VPN worked in the past without any problems. CheckPoint seems to have a solution, but I do not have the ability to change the IP in my client and of course using another NAT device in between is not a solution for me. Edit: adding link to the Checkpoint solution, https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk26189

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• Mac OS X behind OpenLDAP and Samba

  - by Sam Hammamy

  I have been battling for a week now to get my Mac (Mountain Lion) to authenticate on my home network's OpenLDAP and Samba. From several sources, like the Ubuntu community docs, and other blogs, and after a hell of a lot of trial and error and piecing things together, I have created a samba.ldif that will pass the smbldap-populate when combined with apple.ldif and I have a fully functional OpenLDAP server and a Samba PDC that uses LDAP to authenticate the OS X Machine. The problem is that when I login, the home directory is not created or pulled from the server. I get the following in system.log Sep 21 06:09:15 Sams-MacBook-Pro.local SecurityAgent[265]: User info context values set for sam Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_authenticate(): Got user: sam Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_authenticate(): Got ruser: (null) Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_authenticate(): Got service: authorization Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in od_principal_for_user(): no authauth availale for user. Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in od_principal_for_user(): failed: 7 Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_authenticate(): Failed to determine Kerberos principal name. Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_authenticate(): Done cleanup3 Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_authenticate(): Kerberos 5 refuses you Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_authenticate(): pam_sm_authenticate: ntlm Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_acct_mgmt(): OpenDirectory - Membership cache TTL set to 1800. Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in od_record_check_pwpolicy(): retval: 0 Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_setcred(): Establishing credentials Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_setcred(): Got user: sam Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_setcred(): Context initialised Sep 21 06:09:15 Sams-MacBook-Pro.local authorizationhost[270]: in pam_sm_setcred(): pam_sm_setcred: ntlm user sam doesn't have auth authority All that's great and good and I authenticate. Then I get CFPreferences: user home directory for user kCFPreferencesCurrentUser at /Network/Servers/172.17.148.186/home/sam is unavailable. User domains will be volatile. Failed looking up user domain root; url='file://localhost/Network/Servers/172.17.148.186/home/sam/' path=/Network/Servers/172.17.148.186/home/sam/ err=-43 uid=9000 euid=9000 If you're wondering where /Network/Servers/IP/home/sam comes from, it's from a couple of blogs that said the OpenLDAP attribute apple-user-homeDirectory should have that value and the NFSHomeDirectory on the mac should point to apple-user-homeDirectory I also set the attr apple-user-homeurl to <home_dir><url>smb://172.17.148.186/sam/</url><path></path></home_dir> which I found on this forum. Any help is appreciated, because I'm banging my head against the wall at this point. By the way, I intend to create a blog on my vps just for this, and create an install script in python that people can download so no one has to go through what I've had to go through this week :) After some sleep I am going to try to login from a windows machine and report back here. Thanks Sam

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• Flash plugin locks up Firefox, Chrome and Safari behind a corporate proxy, IE6 works fine

  - by Shevek

  At work I am forced by corporate policy to use IE6. Obviously this is not so good so I use FF for most of my browsing. However there is a problem once I have installed the Flash plug-in - FF locks up when trying to load Flash media. Looking at the status bar at the time of the lock up it appears this happens when the browser tries to get cross domain data. The Flash Active X plug-in in IE does not suffer this issue. I have tried it in a brand new profile in FF with Flash as the only plug in and it locks up. We have 2 different proxy servers and both exhibit the same problem. I have also tried Chrome and Safari and both lock up with the plug-in installed. So, has anyone else had this problem and solved it? Or, is there any way to disable cross domain data access in the flash plug-in? Or, is there any way to disable the "This site needs an additional plug-in" ribbon which appears when the plug-in is not installed. Many thanks!

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• tomcat behind 2 apache http server

  - by luigidemasi

  I have this architecture: http Ajp [Apache A] ------- [Apache B] ---------- [Tomcat] there is a way to configure [Apache B] to forward an ajp request in order to achive this: Ajp Ajp [Apache A] ------- [Apache B] ---------- [Tomcat] ??? many thanks in advance.

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• setting up a WGR614v7 behind a linux box

  - by commodore fancypants

  Here's the setup, I have an openSUSE box with 2 NICs, one goes to my home network router, the other has DHCP running and it attached to a wireless router. I'm trying to get this setup to work before I switch to the linux box as my home network router. My DHCP will offer the wireless router (a WGR614v7) an address, but anything that connects to the wireless router ends up with a APIPA address. I have all the firewalls on the wireless network turned off as well as the wireless router's own DHCP. The linux box isn't offering addresses to anything past the wireless router. Is this a problem with the router or my DHCP setup? For testing purposes, I have both NICs set in the internal zone and I've tried wireless and wired connections to the WGR614v7 both to no avail.

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• IIS8 behind a VPN + Windows Server 2012 - how to properly bind IP+Port

  - by ryugen

  This is my first question so I hope I'm going to give you enough information. I'm running Windows Server 2012 within the Hyper-V environment of my Windows 8 machine. Within Windows Server 2012 I'm running a VPN tool based on openVPN to hide my real IP. When I run IIS8 with the VPN disconnected it works flawlessly through the Internet (port 80 forwarded correctly). But as soon as I connect to the VPN I can't reach my site through the domain anymore. Now I tried basically everything I know which is why I'm asking you guys. I tried binding IIS8 to the IP of my virtual ethernet card. I tried changing the priority of the NIC through the "Network and sharing center" via the advanced tab. I used ipconfig /flushdns in case there was something wrong in the DNS handling. Hell, I even turned off the Windows firewall. I also used a port scanner to verify the problem. The webserver is reachable on port 80 with VPN disconnected and immediately gets unreachable on connect. Theoretically both IPs (my regular one AND the VPN) should be reachable or at least not impair the other one right? Do you have any other suggestion? Do I have to route something somewhere somehow?

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• Configure J2EE Agent with OpenAM behind Reverse Proxy

  - by Troy

  I have a reverse proxy with two SSL enabled NamedVirtualHosts on different ports. Both containers on each internal host is GF 2.1.1. Proxy configuration as follows: Proxy URL -> Internal URL https://apps.mydomain.com -> http://apps.internal.com https://secure.otherdomain.com:8080/ -> http://secure.internal.com I initially tried configuring the J2EE agent in OpenAM and the web app container to use the internal URLs (I appended /openam and /agentapp respectively). However, I received the following errors when trying to access a secured application such as https://apps.mydomain.com/webapp. java.lang.RuntimeException: Failed to load configuration: ApplicationSSOTokenProvider.getApplicationSSOToken(): Unable to get Application SSO Token A second attempt gives the following error: java.lang.NoClassDefFoundError: Could not initialize class com.sun.identity.agents.filter.AmFilterManager Along with these in the agent debug.out: ERROR: Failed to obtain auth service url from server: null://null:null ... SiteMonitor: Site URL http://secure.internal.com/openam/namingservice is not available. If I specify the server and agent urls using the proxy urls, then the agent appears to be working and I am redirected to the OpenAM login page. However, the goto in the URL is http://apps.mydomain.com/webapp instead of https://apps.mydomain.com/webapp (missing https). So after authentication, the redirect fails. Now I could possibly get by with mod_rewrite, but it feels hackish and I really want to know what's going on. Any ideas?

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• Code refactoring with Visual Studio 2010 Part-2

  - by Jalpesh P. Vadgama

  In previous post I have written about Extract Method Code refactoring option. In this post I am going to some other code refactoring features of Visual Studio 2010.  Renaming variables and methods is one of the most difficult task for a developer. Normally we do like this. First we will rename method or variable and then we will find all the references then do remaining over that stuff. This will be become difficult if your variable or method are referenced at so many files and so many place. But once you use refactor menu rename it will be bit Easy. I am going to use same code which I have created in my previous post. I am just once again putting that code here for your reference. using System; namespace CodeRefractoring { class Program { static void Main(string[] args) { string firstName = "Jalpesh"; string lastName = "Vadgama"; Print(firstName, lastName); } private static void Print(string firstName, string lastName) { Console.WriteLine(string.Format("FirstName:{0}", firstName)); Console.WriteLine(string.Format("LastName:{0}", lastName)); Console.ReadLine(); } } } Now I want to rename print method in this code. To rename the method you can select method name and then select Refactor-> Rename . Once I selected Print method and then click on rename a dialog box will appear like following. Now I am renaming this Print method to PrintMyName like following.   Now once you click OK a dialog will appear with preview of code like following. It will show preview of code. Now once you click apply. You code will be changed like following. using System; namespace CodeRefractoring { class Program { static void Main(string[] args) { string firstName = "Jalpesh"; string lastName = "Vadgama"; PrintMyName(firstName, lastName); } private static void PrintMyName(string firstName, string lastName) { Console.WriteLine(string.Format("FirstName:{0}", firstName)); Console.WriteLine(string.Format("LastName:{0}", lastName)); Console.ReadLine(); } } } So that’s it. This will work in multiple files also. Hope you liked it.. Stay tuned for more.. Till that Happy Programming.

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• Running a Vonage router behind a Linksys Firewall

  - by sludge

  I have a Vonage router used for outgoing VOIP calls. It gets a LAN ip by connecting to a Linksys WRT54g via DHCP. From there, it cannot actually get a WAN ip or connect out. What do I need to port forward?

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• Choose the Text Editor Used to View Source Code in Internet Explorer

  - by Asian Angel

  Everyone has a favorite text editor that they like to use when viewing or working with source code. If you are unhappy with the default choice in Internet Explorer 8 then join us as we show you how to set up access to your favorite text editor. A Look at Before Here is Internet Explorer on our test system ready to help us view the source code for one of the pages here at the site. Perhaps “Notepad” is your default source code viewer… Or in the case of our test system where “EditPad Lite” was the default due to choices we made while installing it. Choose Your Favorite Text Editor Chances are you have your own personal favorite and want to make it the default source code viewer. To get started go to the “Tools Menu”  and click on “Developer Tools” or press “F12” to access the “Developer Tools Window”. Once you have the “Developer Tools Window” open go to the “File Menu”, then “Customize Internet Explorer View Source”, and click on “Other”. Once you have clicked on “Other” you will see the “Program Directory” for the current default app. Here you can see the “Program Files Folder” for “EditPad Lite”. To change the default app simply browse for the appropriate program folder. On our test system we decided to change the default to “Editra”. Once you have located the program that you want to use click on the “.exe” file for that app and click “Open”. Once you have clicked “Open”, all that is left for you to do is close the “Developer Tools Window”…everything else is already taken care of. And just like that you can be viewing source code with your favorite text editor. Conclusion If you have been unhappy with the default source code viewer in Internet Explorer 8 then you can set up access to your favorite text editor in just a couple of minutes. Nice, quick, and easy the way it ought to be. Thanks to HTG & TinyHacker reader Dwight for the tip! Similar Articles Productive Geek Tips View Webpage Source Code in Your Favorite Text Editor – FirefoxView Webpage Source Code in Tabs in FirefoxEasily View Source of Included Files in FirefoxRemove ISP Text or Corporate Branding from Internet Explorer Title BarRemove PartyPoker (Or Other Items) from the Internet Explorer Tools Menu TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 PCmover Professional Automate Tasks in Linux with Crontab Discover New Bundled Feeds in Google Reader Play Music in Chrome by Simply Dragging a File 15 Great Illustrations by Chow Hon Lam Easily Sync Files & Folders with Friends & Family Amazon Free Kindle for PC Download

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