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• iOS Core Data migration: moving something from an entity into a file

  - by Tim Sullivan

  I have a scenario where I'm moving the contents of a blob stored in a core data entity into a file. I need a way to export that data during a migration, where I know the entity that's being converted and save the blob to a file, writing the location of that file into the converted entity's appropriate attribute. I can't seem to find a way to do this. The docs regarding the Three Stage Migration seem to indicate what can be done, but I'm not sure where to define things, or what exactly to define.

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• How to determine a text block of a file in one version come from which file in the previous version?

  - by Muhammad Asaduzzaman

  The problem is described below: Suppose I have a list of files in one version(say A,B,C,D). In the next version I have the following files(A,E,F,G). There are some similarities in their contents. The files in the later version comes from the previous version by file name renaming, content addition, deletion or partial modification or without any change( for example A is not changed). I take a block of text from a file(E, 2nd version) and check which files(in the 1st version) contain this text block. I found that B,C and D contain the text fragment. I want to determine from which file(B or c or d) this text block actually comes from.(I assume that E is a file whose name change in the second version). Since the contents may be changed, added or deleted in the later version, so in order to determine similarity I use LCS algorithm. But I cannot map the file with its previous version. I think one possible approach might be to use the location information of the match text blocks. But this heuristics not always work. Is there any research or algorithm exist to find so. Any direction will be helpful. Thanks in advance.

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• Resolving the path of 'web-app/file/misc' from 'src' in Grails

  - by firnnauriel

  I created a class under 'src' dir. I'm using this code to access the 'images' directory for all files inside 'grails-app': ApplicationHolder.application.parentContext.getResource("file/misc").file; I'm having this error when I access it in a 'src' class: application has private access in org.codehaus.groovy.grails.commons.ApplicationHolder Any comment on why is this happening? How can I access "file/misc" when app is deployed to tomcat?

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• Jquery Ajaxform with input type=file and multifile

  - by crunchingnumbers

  Im using ajax form with multifile. However ajaxform just seems to quietly die and does not do anything if using multifile. Multifile is just a jquery plugin that builds a list of input type=file so that you can upload multiple files at once, before which you can add/delete your file upload list. I've looked at multifile and made one change to ensure that it generated a unique name as well as id which it didn't do before and i've checked the form elements multifile is building which all appear to be correct. From looking at ajaxform, it seems that it shoulld just generate the iframe as normal and post the multiple input type=file but it does nothing. Has anyone else experienced problems with multiple input type=file uploads

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• how to get file name from java script...input type="file".....

  - by dpaksp

  in html when i select some file...using JavaScript i need to display the whole file path..i tried i was able to get only the file name that i have selected...how to get the full path, is is possilbe

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• What's the best way/practice to get the extension of a uploaded file in PHP

  - by Roland

  I have a form that allow users to upload files, I however need to get the file extension, which I am able to get, but not sure if I'm using the most effective solution I can get it using the following ways $fileInfo = pathinfo($_FILES['File']['name']); echo $fileInfo['extension']; $ext = end(explode('.',$_FILES['File']['name'])); echo $ext; Which method is the best to use or are there even better solutions that would get the extension?

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• Convert file to html table with PERL

  - by user329313

  Hi everyone, I am trying to write a simple Perl CGI script that: -runs a CLI script -reads the resulting .out file and converts the data in the file to an HTML table. Here is some sample data from the .out file: 10.255.202.1 2472327594 1720341 10.255.202.21 2161941840 1484352 10.255.200.0 1642646268 1163742 10.255.200.96 1489876452 1023546 10.255.200.26 1289738466 927513 10.255.202.18 1028316222 706959 10.255.200.36 955477836 703926 Any help would be much appreciated. -Sebastian

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• Encrypt file using M2Crypto

  - by Bear

  It is known that I can read the whole file content in memory and encrypt it using the following code. contents = fin.read() cipher = M2Crypto.EVP.Cipher(alg="aes_128_cbc", key = aes_key, iv = aes_iv, op = 1) encryptedContents = cipher.update(contents) encryptedContents += cipher.final() But what if the file size is large, is there a way for me to pass the input stream to M2Crypto instead of reading the whole file first?

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• Strange behavior while returning csv file from spring controller

  - by Fanooos

  I working in a spring application which have an action method that returns a CSV file. This action works fine but in some cases it throws a predefined exception (MyAppException). I have another method that is annotated @ExceptionHandler(MyAppException.class) In the exception handler method I return another csv file but with different contents. The code that returns the csv file is almost the same in the two methods. List<String[]> list= new ArrayList<String[]>(); list.add(new String[]{ integrationRequestErrorLog.getErrorMessage(), Long.toString(integrationRequestErrorLog.getId()), Integer.toString(integrationRequestErrorLog.getErrorCode()) }); CSVWriter writer = new CSVWriter(response.getWriter(), ','); writer.writeAll(list); writer.close(); the difference between the two method is the list of contents. In the first method the file is returned normally while in the exception handler method I have a strange behavior. The exception handler method works fine with Opera browser while it gives me a 404 with FireFox. Opera browser give me 404 also but it download the file while firefox does not? Really I do not understand what is the difference here.

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• Writing contents of file to HTML page with Javascript

  - by garsh0p

  I'm using graphviz to generate a client side imagemap, which generates both the image file and a text file containing the map HTML code. Is there anyway I can dynamically read this file and write this map information onto the HTML page when it loads?

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• File.Exists("SDF File Path") returns a FALSE when run through Unit tests even though it exists in th

  - by shiva-hv

  I am writing Unit tests for a Windows Project. The Executable project on the Client Side of this Windows Project has a code File.Exists("LanguageLookups.sdf") which is used to check and return a Bool if the sdf file exists in the Execution Directory or not. But when i execute the same piece of Code through a Unit test; The code File.Exists("LanguageLookups.sdf") returns a FALSE. Its not able to find this SDF File. Can anybody help me on this?

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• getting an exception when refreshing the configuration in memory on change to external config file

  - by RKP

  Hi, I have a windows service which reads the config settings from an external file which is located at a different path than the path to the executable for the windows service. the windows service uses a FileSystemWatcher to monitor the changes to the external config file and when it the config file is changed, it should refresh the settings in memory by reading the updated settings from the config file. but this is where I am getting an exception "ConfigurationErrorsException" and the message is "An error occurred creating the configuration section handler for appSettings: The process cannot access the file 'M:\somefolder\WindowsService1.Config' because it is being used by another process." and the inner exception is actually "IOException" with same message. here is the code. I am not sure what is wrong with the code. Please help. protected void watcher_Changed(object sender, FileSystemEventArgs e) { ConfigurationManager.RefreshSection(ConfigSectionName); WriteToEventLog(ConfigKeyCheck); if (FileChanged != null) FileChanged(this, EventArgs.Empty); } private void WriteToEventLog(string key) { if (EventLog.SourceExists(ServiceEventSource)) { EventLog.WriteEntry(ServiceEventSource, string.Format("key:{0}, value:{1}", key, ConfigurationManager.AppSettings[key])); } }

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• Get file property

  - by milanjansari

  Hello, How to get file size of pdf,gif,doc etc using xcode. suppose to i get pdf file form resorce folder so how can i get size of for this file. is there any way? Thanks you,

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• C++ MIDI file reading library

  - by Raceimaztion

  I'm trying to write some software to read a MIDI file into an internal data format and use it to control 3D simulated instruments. My biggest problem is reading the MIDI data in from a file, and I'd like to avoid writing all the import code. Does anyone know of a free (preferably Open Source), cross-platform MIDI file reading library? What features does it have? Can it import other note-based music formats?

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• Reverse reading WORD from a binary file?

  - by Angel

  Hi, I have a structure: struct JFIF_HEADER { WORD marker[2]; // = 0xFFD8FFE0 WORD length; // = 0x0010 BYTE signature[5]; // = "JFIF\0" BYTE versionhi; // = 1 BYTE versionlo; // = 1 BYTE xyunits; // = 0 WORD xdensity; // = 1 WORD ydensity; // = 1 BYTE thumbnwidth; // = 0 BYTE thumbnheight; // = 0 }; This is how I read it from the file: HANDLE file = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); DWORD tmp = 0; DWORD size = GetFileSize(file, &tmp); BYTE *DATA = new BYTE[size]; ReadFile(file, DATA, size, &tmp, 0); JFIF_HEADER header; memcpy(&header, DATA, sizeof(JFIF_HEADER)); This is how the beginning of my file looks in hex editor: 0xFF 0xD8 0xFF 0xE0 0x00 0x10 0x4A 0x46 0x49 0x46 0x00 0x01 0x01 0x00 0x00 0x01 When I print header.marker, it shows exactly what it should (0xFFD8FFE0). But when I print header.length, it shows 0x1000 instead of 0x0010. The same thing is with xdensity and ydensity. Why do I get wrong data when reading a WORD? Thank you.

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• Update JSON file C# W8 development

  - by AndrewB

  At the moment, I've got a JSON file with content looking like this: { "username": "test", "someNumber":100 } I'm using JSON.Net to fetch the .JSON file from a webserver - C#: var http = new HttpClient(); http.MaxResponseContentBufferSize = Int32.MaxValue; var response = await http.GetStringAsync(URI); var result = JsonConvert.DeserializeObject<DatClass.Result>(response); This works great together with the class getting/setting the properties. However, what I would like to know is whether there's a good way for a user to update the .JSON file through a textbox UI? As in: [textbox - update username] [update button] - username sent to server - .JSON file updated - [textblock - showing updated username in UI]. I'm not looking for exact code solutions, I'm rather looking for good solutions on this, and/or if this is a terrible idea of an easy database(?).

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• POST data disapearing on large file upload

  - by DfKimera

  I'm having issues with a file uploading utility in my PHP application. When sending large files (9MB+) over the form, I get a very odd behaviour: the POST data I've included in the form dissapears, including the file information. I've already increased all PHP limits I could (time limit, max input time, post max size, memory limit and upload max filesize) and I still can't get the proper behaviour. I've tried replacing the regular HTTP forms with a Flash-based solution (SWFUpload, www.swfupload.org), still the same behaviour. I've tried multiple files of similar sizes and its definitely not a particular file issue. I've debugged the POST vars sent using Firebug, and the correct variables are still there in the header, together with the file. What could be going on here?

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• iOS get file size on disk

  - by F2_CMD

  I'm trying to get the size on disk of a file in iOS using Objective C. As of now I've been able to get the actual size of the file and other file information using NSFileManager and then getting the attributes attributesOfItemAtPath:error but not the size on disk. I also tried getting the file size from struct stat but again it doesn't give me size on disk.I tried using NSTask to make a call to du -h but iOS didn't allow me to fork other processes. Any ideas are welcome :) I know this questions is similar to many others but the difference is that I'm trying to do this in iOS and most of the methods used in other systems don't work here. Thanks

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• how we can save a file as temporary basis

  - by SunilRai86

  how we can save a file as temporary basis i have a xml file it is in encrypted mode i want to decrypt it .but i want it doesn't save on disk rather it save on flash memory. after decryption i have to read values and then it should destroy(decrypted xml file).

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• download file exception handling

  - by klaus-vlad

  Hi, In my application I download several critical files from a server, and I want to write some code that handles the case where the a file download didn't complete for a reason or other ,to retry downloading it at next startup. The function that downloads a file at a time however throws only MalformedURLException and IOException , but if these exceptions are thrown that means that the download didn't even begin. How should I arrange things so I can treat the case where a download failed , even if it began ? download(String file) throws MalformedURLException ,IOException { }

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• page sends file to curl i want to get download link insted

  - by Ben

  there is a page that i need to post a password to it and then i get a file to download. the post goes to the same page address its loads again and pop up the download manager. now i want to do the same but in curl, i posted the data to the url and then its sends me the file back but i dont want my script to download the whole file i want only to get a link to download it by myself. how can i do that?

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• Converting UIImage into PDF File

  - by mactalent

  Hello All, Iam trying to saving an UIImage in PDF file. How can i do this? How i would save and image into pdf file and then export that pdf file? Please suggest the solution for the issue i faced. Thank You.

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• delete attachment file

  - by sam

  hi folks., i am using System.Net.Mail for sending mail in asp.net.. how to delete attachment file after it is send as attachment mail.. i tried to use File.Delete method.. but i am getting this error.. the process cannot access the file path\fun.jpg' because it is being used by another process. thank you

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• libarchive reads too many chars when extracting a file

  - by ojreadmore

  I've written a C program to extract files from a tar archive using libarchive. I'd like to extract a file from this archive and print it to standard output. But I get extra characters. It's garbage, but it's from another file (possibly adjacent to it in the archive.) I expect output to end at </html>. Here is the code that reads this tar file. libarchive 2.8.3 compiled on mac os X 10.6.3. gcc 4.2 x86_64 ls -l vendar-definition.html gives me 1921 for the file size. And so shows tar tfv 0000.tar | grep vendar-definition.html. So reports the C output that states the file size. To me this seems correct. Two possibilities I can see for why my output is not as expected: 1. I've made a beginner's mistake or 2. multibyte characters in the archive files has something to do with it.

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• Code Golf: Counting XML elements in file on Android

  - by CSharperWithJava

  Take a simple XML file formatted like this: <Lists> <List> <Note/> ... <Note/> </List> <List> <Note/> ... <Note/> </List> </Lists> Each node has some attributes that actually hold the data of the file. I need a very quick way to count the number of each type of element, (List and Note). Lists is simply the root and doesn't matter. I can do this with a simple string search or something similar, but I need to make this as fast as possible. Design Parameters: Must be in java (Android application). Must AVOID allocating memory as much as possible. Must return the total number of Note elements and the number of List elements in the file, regardless of location in file. Number of Lists will typically be small (1-4), and number of notes can potentially be very large (upwards of 1000, typically 100) per file. I look forward to your suggestions.

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