I have seen some posts that mention the xmlserializer being called at runtime in .Net.
I have a sharepoint web-part that calls a webservice to retrieve data, and then is supposed to display that data on the web-part. But I get this error:
System.Runtime.InteropServices.ExternalException: Cannot execute a program. The command being executed was "C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe" /noconfig /fullpaths #"C:\Users\my_deploy_spFarm_user\AppData\Local\Temp\OICE_356C17F3-2ED2-423C-8BBE-CA5C05740FD7.0\eelwfhnn.cmdline
Now the posts I have read here, state that the problem is that the compiler is trying to to create an XML serialization assembly on the fly, but does not have privilege to do so.
I have seen some suggestions to use the post-build events to create this XML Serialization Assembly at Compile-time. However I am not sure of how to do that, and also I am not sure if this assemply would get included in the .wsp package?
I'd take a good look at whether you really want the full, automatically generated serializer, or whether you just want to emit/parse some relatively straightforward XML - if the latter, you'll solve this problem by not using stuff that needs generated code, i.e. use the XmlReader/XmlWriter directly.
This link has the basic command to create the pre-compiled serializers.
Related
I am new to unit testing and the Qt framework. I have been assigned to write a unit test to test the opening of text files.
I have looked the the tutorials for Qt test. But I have no idea how to proceed. (I have to use QTestLib). Please guide me what I should do.
Boost libraries are being used to open the csv and delimited text-files to import the data in the application.
By testing, I am assuming that you want to check if the files are being read properly.
1) To get a better understanding about the Qt Project structure, check out this link
2) Locate the class that is actually calling the boost libraries to read the data, you might want to test this class (It depends on you how you want to implement, without any details, I cannot give a better explanation)
3) Create the corresponding object and invoke the reading of the file. After the file has been read, you can QVERIFY or QCOMPARE the data read by the class and the actual values. To use custom datatypes in the previous functions, look at this link. It is explained in the website, how to create and use custom datatypes for the above functions.
4) To run multiple tests in a single Test project (Qt), look at this github repo (I'm unable to find the website where it was originally posted).
I hope this gives an idea of how to get started with writing the test. It really depends on what your requirements are, without knowing the details, I might not be able to help more
I am currently developping a windows application who test railroad equipments to find any defaults.
Utility A => OK
Utility B => NOK
...
This application will check the given equipment and generate a report.
This report needs to be written once, and no further modifications are allowed since this file can be used as working proof for the equipment.
My first idea was ta use pdf files (haru lib looks great), but pdf can also be modified.
I told myself that I could obsfuscate the report, and implement a homemade reader inside my application, but whatever way I store it, the file would always be possibly accessed and modified right?
So I'm running out of ideas.
Sorry if my approach and my problem appear naive but it's an intership.
Thanks for any help.
Edit: I could also add checksums for files after I generated them, and keep a "checksums record file", and implement a checksums comparison tool for verification? just thought about this.
I believe the answer to your question is to use any format whatosever, and use a digital signature anybody can verify, e.g., create a gnupg, get that key signed by the people who require to check your documents, upload it to one of the key servers, and use it to sign the documents. You can publish the documents, and have a link to your public key available for verification; for critical cases someone verifying must be trust your signature (i.e., trust somebody who signed your key).
People's lives depend on the state of train inspections. Therefore, I find it hard to believe that someone expects you to solve this problem only using free-as-in-beer components.
Adobe supports a strong digital signature model. If you buy into their technology base, you can create PDF's that are digitally signed, and are therefore tamper-evident, as the consumer can check for the signature.
You can, as someone else pointed out, use GNUpg, or for that matter OpenSSL, to implement your own signature scheme, but railroad regulators are somewhat less likely to figure out how to work with it.
I would store reports in an encrypted/protected datastore.
When a user accesses a report (requests a copy, the original is of course always in the database and cannot be modified), it includes the text "Report #XXXXX". If you want to validate the report, retrive a new copy from the system using the Report ID.
I've been following the advice in this question.
How to add a WiX custom action that happens only on uninstall (via MSI)?
I have an executable running as a custom action after InstallFinalize which I intend to purge all my files and folders. I was just going to write some standard deletion logic but I'm stuck on the point that Rob Mensching made that the windows installer should handle this incase someone bails midway through an uninstallation.
"create a CustomAction that adds temporary rows to the RemoveFiles table"
I'm looking for some more information on this. I'm not really sure how to achieve this in c++ and my searching hasn't turned up a whole lot.
http://msdn.microsoft.com/en-us/library/windows/desktop/aa371201(v=vs.85).aspx
Thanks
Neil
EDIT: I've marked the answer due to the question being specific about how to add files to the removeFiles table in c++ however I'm inclined to agree that the better solution is to use the RemoveFolderEx functionality in wix even though it is currently in beta (3.6 I think)
Roughly you will have to use the following functions in this order:
MsiDatabaseOpenView - the (input) handle is the one you get inside your custom action functions
MsiCreateRecord - to create a record with the SQL stuff inside
MsiRecord* - set of functions to prepare the record
MsiViewExecute to insert the new record into whatever table you please ...
MsiCloseHandle - with the handle from the very first step and the record handle (from MsiCreateRecord)
Everything is explained in detail over at MSDN. However, pay special attention to the section "Functions Not for Use in Custom Actions".
The documentation of MsiViewExecute also explains how the SQL queries should look. To get a feel for them you may want to use one of the .vbs scripts that are part of the Windows Installer SDK.
If you use WiX to create your installation package, consider using RemoveFolderEx element. It does what you want and you don't have to write the code yourself.
Read Tactical directory nukes for an example of how to use it.
If you still want to implement it yourself, you can get your inspiration from this blog post, there's the code for doing this in VBScript.
I'm looking for a good efficient method for scanning a directory structure for changed files in Windows XP+. Something like how git does it is exactly what I'm looking for, when running a git status it displays all modified files, all new (untracked) files and deleted files very quickly which is exactly what I would like to do.
I have a basic model up and running which performs an initial scan and stores all filenames, size, dates and attributes.
On a subsequent scan it checks if the size, attributes or date have changed and marks as a changed file.
My issue now comes in detecting moved and deleted files. Is there a tried and tested method for this sort of thing? I'm struggling to come up with a good method.
I should mention that it will eventually use ReadDirectoryChangesW to monitor files and alert the user when something changes so a full scan is really a last resort after the initial scan.
Thanks,
J
EDIT: I think I may have described the problem badly. The issue I'm facing is not so much detecting the changes - I have ReadDirectoryChangesW() using IOCP on multiple threads to detected when a change happens, the issue is more what to do with the information. For example, a moved file is reported as a delete followed by a create and a rename comes in 2 parts, old name, followed by new name. So what I'm asking is how to differentiate between the delete as part of a move and an actual delete. I'm guessing buffering the changes and processing batches would be an option but feels messy.
In native code FileSystemWatcher is replaced by ReadDirectoryChangesW. Using this properly is not simple, there is a good baseline to build off here.
I have used this code in a previous job and it worked pretty well. The Win32 API itself (and FileSystemWatcher) are prone to problems that are described in the docs and also discussed in various places online, but impact of those will depending on your use cases.
EDIT: the exact change is indicated in the FILE_NOTIFY_INFORMATION structure that you get back - adds, removals, rename data including old and new name.
I voted Liviu M. up. However, another option if you don't want to use the .NET framework for some reason, would be to use the basic Win32 API call FindFirstChangeNotification.
You can use USN journaling if you are up to it, that is pretty low level (NTFS level) stuff.
Here you can find detailed information and source code included. It is written in C# but most of it is PInvoking C/C++ functions.
I have to parse the XML file and build objects representation based on that, now once I get all these data I create entries in various database for these data objects. I have to do second pass over that for value as in the first pass all I could do is build the assets in various databases. and in second pass I get the values for all the data and put it in the database.
I have a feeling that this can be done in a single pass but I just want to see what are your opinions. As I am just a student who started with professional work, experienced ppl please help.
Can someone who have ideas or done similar work, please provide some light on the topic so that I can think over the possibility of the work and get the prototype going based on your suggestion.
Thanks a lot for your precious time, I honestly appreciate it.
You might be interested in learning several techniques of building XML parsers like DOM or SAX. As it is said in SAX description the only thing which requires second pass could be the XML validation but not the creating the tree.
Beside DOM and SAX parsing, you can use XQuery for querying data from XML files.It is fast, robust and efficient.
here is a link
You can use Qt Xml module for DOM ,SAX and XQuery, btw it is open source.
Another option is xml - C++ data binding, Here is the link.You can create C++ codes from definition directly.It is an elegant solution.
EDIT:
the latter one is at compile time.
You can also use Apache Licensed http://xmlbeansxx.touk.pl/. It works under Windows and Linux.
you could take a look at the somewhat simpler 'pull' api called stax instead of using sax (event based).