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  • create zip files with arabic characters

    - by fatiDev
    i have the following situation i have to modify an existing files and return a zip containing this modified files , i'm in web application context what i done up to now is : ///////////////// modifying the existing file with poi librairy FileInputStream inpoi = new FileInputStream("file_path"); POIFSFileSystem fs = new POIFSFileSystem(inpoi); HWPFDocument doc = new HWPFDocument(fs); Range r = doc.getRange(); r.replaceText("<nomPrenom>","test"); byte[] b = doc.getDataStream(); //////////////////////// create the zip file and copy the modified files into it ZipOutputStream out = new ZipOutputStream(new FileOutputStream("my.zip")); out.putNextEntry(new ZipEntry("file")); for (int j = 0; j < b.length; j++) { out.write(b[j]); } the created zipped file can't be read correctly with word given that the original file is wrotten in arabic

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  • C#: how to update winform from thread?

    - by JackN
    A C# thread (Read()) causes System.NotSupportedException when it tries to update a winform based on received content. The full error message is Read() System.NotSupportedException: An error message cannot be displayed because an optional resource assembly containing it cannot be found at Microsoft.AGL.Common.MISC.HandelAr() at System.Windows.Forms.ProgressBar._SetInfo() at System.Windows.Forms.ProgressBar.set_Value() at ...ProcessStatus() at ...Read() The Build/Target Environment is: Microsoft.NET\SDK\CompactFramework\v2.0\WindowsCE. Is the problem writing to the ProgressBar from a Thread? If so, what is the correct C#/winforms method to update a ProgressBar from a Thread? In this application the Read() Thread is continuous: it is started when the application starts and runs forever. void ProcessStatus(byte[] status) { Status.Speed = status[5]; var Speed = Status.Speed/GEAR_RATIO; Status.Speed = (int) Speed; progressBarSpeed.Value = Status.Speed; ...

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  • SHA-256 encryption wrong result in Android

    - by user642966
    I am trying to encrypt 12345 using 1111 as salt using SHA-256 encoding and the answer I get is: 010def5ed854d162aa19309479f3ca44dc7563232ff072d1c87bd85943d0e930 which is not same as the value returned by this site: http://hash.online-convert.com/sha256-generator Here's the code snippet: public String getHashValue(String entity, String salt){ byte[] hashValue = null; try { MessageDigest digest = MessageDigest.getInstance("SHA-256"); digest.update(entity.getBytes("UTF-8")); digest.update(salt.getBytes("UTF-8")); hashValue = digest.digest(); } catch (NoSuchAlgorithmException e) { Log.i(TAG, "Exception "+e.getMessage()); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } return BasicUtil.byteArrayToHexString(hashValue); } I have verified my printing method with a sample from SO and result is fine. Can someone tell me what's wrong here? And just to clarify - when I encrypt same value & salt in iOS code, the returned value is same as the value given by the converting site.

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  • InternetReadFile() corrupting downloads in C

    - by Lienau
    I'm able to download text documents (.html, .txt, etc) but I can't download images or exe's. I'm pretty sure that this is because I'm using a char, and those files are binary. I know that in C# I would use a byte. But what data-type would I use in this case? char buffer[1]; DWORD dwRead; FILE * pFile; pFile = fopen(file,"w"); while (InternetReadFile(hRequest, buffer, 1, &dwRead)) { if(dwRead != 1) break; fprintf(pFile,"%s",buffer); } fclose(pFile);

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  • Python and hebrew encoding/decoding error

    - by user340495
    Hey, I have sqlite database which I would like to insert values in Hebrew to I am keep getting the following error : UnicodeDecodeError: 'ascii' codec can't decode byte 0xd7 in position 0: ordinal not in range(128) my code is as following : runsql(u'INSERT into personal values(%(ID)d,%(name)s)' % {'ID':1,'name':fabricate_hebrew_name()}) def fabricate_hebrew_name(): hebrew_names = [u'????',u'???',u'???',u'???',u'????',u'???',u'????',u'???',u'????',u'?????',u'????',u'???',u'????'] return random.sample(names,1)[0].encode('utf-8') note: runsql executing the query on the sqlite database fabricate_hebrew_name() should return a string which could be used in my SQL query. any help is much appreciated.

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  • Inserting into a bitstream

    - by evilertoaster
    I'm looking for a way to efficiently insert bits into a bitstream and have it 'overflow', padding with 0's. So for example if you had a byte array with 2 bytes: 231 and 109 (11100111 01101101), and did BitInsert(byteArray,4,00) it would insert two bits at bit offset 4 making 11100001 11011011 01000000 (225,219,24). It would be ok even the method only allowed 1 bit insertions e.g. BitInsert(byteArray,4,true) or BitInsert(byteArray,4,false). I have one method of doing it, but it has to walk the stream with a bitmask bit by bit, so I'm wondering if there's a simpler approach... Answers in assembly or a C derivative would be appreciated.

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  • Optimize C# Code Fragment

    - by Eric J.
    I'm profiling some C# code. The method below is one of the most expensive ones. For the purpose of this question, assume that micro-optimization is the right thing to do. Is there an approach to improve performance of this method? Changing the input parameter to p to ulong[] would create a macro inefficiency. static ulong Fetch64(byte[] p, int ofs = 0) { unchecked { ulong result = p[0 + ofs] + ((ulong)p[1 + ofs] << 8) + ((ulong)p[2 + ofs] << 16) + ((ulong)p[3 + ofs] << 24) + ((ulong)p[4 + ofs] << 32) + ((ulong)p[5 + ofs] << 40) + ((ulong)p[6 + ofs] << 48) + ((ulong)p[7 + ofs] << 56); return result; } }

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  • Which header files are necessary to run this code snippet?

    - by httpinterpret
    It's from here,but fails when compiling: int main(int argc, char **argv) { struct hostent { char *h_name; // main name char **h_aliases; // alternative names (aliases) int h_addrtype; // address type (usually AF_INET) int h_length; // length of address (in octets) char **h_addr_list; // alternate addresses (in Network Byte Order) }; #define h_addr h_addr_list[0] // First address of h_addr_list. struct hostent *info_stackoverflow; int i = 0; info_stackoverflow = gethostbyname( "www.stackoverflow.com" ); printf("The IP address of %s is %s", info_stackoverflow->h_name, inet_ntoa( * ((struct in_addr *)info_stackoverflow->h_addr ))); /* aliases */ while( *(pc_ip->h_aliases + i) != NULL ) { printf("\n\tAlias: %s", *(pc_ip->h_aliases + i) ); i++; } }

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  • C# socket blocking behavior

    - by Gearoid Murphy
    My situation is this : I have a C# tcp socket through which I receive structured messages consisting of a 3 byte header and a variable size payload. The tcp data is routed through a network of tunnels and is occasionally susceptible to fragmentation. The solution to this is to perform a blocking read of 3 bytes for the header and a blocking read of N bytes for the variable size payload (the value of N is in the header). The problem I'm experiencing is that occasionally, the blocking receive operation returns a partial packet. That is, it reads a volume of bytes less than the number I explicitly set in the receive call. After some debugging, it appears that the number of bytes it returns is equal to the number of bytes in the Available property of the socket before the receive op. This behavior is contrary to my expectation. If the socket is blocking and I explicitly set the number of bytes to receive, shouldn't the socket block until it recv's those bytes?, any help, pointers, etc would be much appreciated.

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  • File Encrypt/Decrypt under load?

    - by chopps
    I found an interesting article about encrypting and decrypting files but since it uses a file.dat to store the key this will run into problems when theres alot of users on the site dealing with alot of files. http://www.codeproject.com/KB/security/VernamEncryption.aspx?display=Print Should a new file be created every time a file needs decrypting or would there be a better way to do this? UPDATE: Here is what im using to avoid the locking problems. using (Mutex FileLock = new Mutex(true, System.Guid.NewGuid().ToString())) { try { FileLock.WaitOne(); using (FileStream fs = new FileStream(keyFile, FileMode.Open)) { keyBytes = new byte[fs.Length]; fs.Read(keyBytes, 0, keyBytes.Length); } } catch (Exception ex) { EventLog.LogEvent(ex); } finally { FileLock.ReleaseMutex(); } } I tested it on 1000 TIFFs doing both encryption and decryption without any errors.

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  • [C++] Wrong EOF when unzipping binary file

    - by djzmo
    Hello there, I tried to unzip a binary file to a membuf from a zip archive using Lucian Wischik's Zip Utils: http://www.wischik.com/lu/programmer/zip_utils.html http://www.codeproject.com/KB/files/zip_utils.aspx FindZipItem(hz, filename.c_str(), true, &j, &ze); char *content = new char[ze.unc_size]; UnzipItem(hz, j, content, ze.unc_size); delete[] content; But it didn't unzip the file correctly. It stopped at the first 0x00 of the file. For example when I unzip an MP3 file, it will only unzip the first 4 bytes: 0x49443303 (ID3\0) because the 5th to 8th byte is 0x00000000. I also tried to capture the ZR_RESULT, and it always return ZR_OK (which means completed without errors). I think this guy also had the same problem, but no one replied to his question: http://www.codeproject.com/KB/files/zip_utils.aspx?msg=2876222#xx2876222xx Any kind of help would be appreciated :)

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  • alternative to check, whether a value is in a set

    - by stanleyxu2005
    Hi All, I have the following code. It looks ugly, if the value equals to one of the following value then do something. var Value: Word; begin Value := 30000; if (Value = 30000) or (Value = 40000) or (Value = 1) then do_something; end; I want to refactor the code as follows: var Value: Word; begin Value := 30000; if (Value in [1, 30000, 40000]) then // Does not work do_something; end; However, the refactored code does not work. I assume that a valid set in Delphi accepts only elements with type byte. If there any good alternative to refactor my original code (besides using case)?

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  • How does Hibernate detect dirty state of an entity object?

    - by ???'Lenik
    Is it using some kind of byte codes modification to the original classes? Or, maybe Hibernate get the dirty state by compare the given object with previously persisted version? I'm having a problem with hashCode() and equals() methods for complicated objects. I feel it would be very slow to compute hash code if the object has collection members, and cyclic references are also a problem. If Hibernate won't use hashCode()/equals() to check the dirty state, I guess I should not use equals()/hashCode() for the entity object (not value object), but I'm also afraid if the same operator (==) is not enough. So, the questions are: How does Hibernate know if a property of an object is changed? Do you suggest to override the hashCode()/equals() methods for complicated objects? What if they contains cyclic references? And, also, Would hashCode()/equals() with only the id field be enough?

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  • What C# data types can be nullable types?

    - by Randy Minder
    Can someone give me a list, or point me to where I can find a list of C# data types that can be a nullable type? For example: I know that Nullable<int> is ok I know that Nullable<byte[]> is not. I'd like to know which types are nullable and which are not. BTW, I know I can test for this at runtime. However, this is for a code generator we're writing, so I don't have an actual type. I just know that a column is "string" or "int32" etc. Thanks.

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  • unsetting application role in classic ASP

    - by user303526
    Hi, I'm trying to unset an application role but have been failing miserably. I was able to get the cookie value after setting (sp_setapprole) the application role. But I haven't been able to use that cookie (type varbinary / byte array) in my query to unset using sp_unsetapprole. If it was any other stored procedure it wouldn't have been a problem. I was able to use Command object and create a parameter which takes data type input of adVarBinary (204) and execute the command line.. but to the Server the query goes as below. exec sp_executesql N'sp_unsetapprole @P1 ',N'@P1 varbinary(36)',0x01000000CD11697F8F0ED3627BC1DAD25FB9CEB3A2EC5B289C658235E510CD9F29230000 Since sp_setapprole and sp_unsetapprole have to be run ad hoc, the sql server is failing to run this line. And I'm finding it hard to append varbinary cookie value to a simple query such as 'sp_unsetapprole ' & varKookie so it runs "directly" on to the server. Any kind of suggestions are welcome. Thanks, Nandagopal

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  • the characters except 0x00-0x7F are not been shown when converted to "UTF-8" from "ISO-8859-1"

    - by Mike.Huang
    I need to get a string from URL request of brower, and then create a text image by requested text. I know the default encoding of the Java net transmission is "ISO-8859-1", it can works normally with all characters what defined in "ISO-8859-1". But when I request a multi-byte Unicode character (e.g. chinese or something like ¤?), then I need to decode it by "UTF-8" from "ISO-8859-1". My codes like: String reslut = new String(requestString.getBytes("ISO-8859-1"), "UTF-8"); Everything is fine, but I found some characters in ISO-8859-1 are not been shown now, which characters are 0x80 - 0xFF(defined in" ISO-8859-1"), i.e. the characters except 0x00-0x7F are not been shown when converted to "UTF-8" from "ISO-8859-1" Any other method can solve this query?

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  • C# public partial struct methods for more System.Windows.Media.Color

    - by dr d b karron
    How can I put in additional methods for manipulating color ? Best would be to overload the struct System.Windows.Media.Color. It is NOT a class (in c#). Now i'm tinkering with putting (in the same file for testing or must i put it in a different file) an namespace (Silverlight Application36 or System.Windows.Media ?) and a partial struct Color Normalize (double R, ...). I should see MyColor.Normalize() start being recognized by intellisense ? I'm not. I'm looking to put in a suite of overloaded color manipulations using floating and double numbers instead of unsigned byte integers. Any hints while I wack at it ? Cheers! dr.K

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  • Why is conversion from UTF-8 to ISO-8859-1 not the same in Windows and Linux?

    - by user1895307
    I have the following in code to convert from UTF-8 to ISO-8859-1 in a jar file and when I execute this jar in Windows I get one result and in CentOS I get another. Might anyone know why? public static void main(String[] args) { try { String x = "Ä, ä, É, é, Ö, ö, Ü, ü, ß, «, »"; Charset utf8charset = Charset.forName("UTF-8"); Charset iso88591charset = Charset.forName("ISO-8859-1"); ByteBuffer inputBuffer = ByteBuffer.wrap(x.getBytes()); CharBuffer data = utf8charset.decode(inputBuffer); ByteBuffer outputBuffer = iso88591charset.encode(data); byte[] outputData = outputBuffer.array(); String z = new String(outputData); System.out.println(z); } catch(Exception e) { System.out.println(e.getMessage()); } } In Windows, java -jar test.jar test.txt creates a file containing: Ä, ä, É, é, Ö, ö, Ü, ü, ß, «, » but in CentOS I get: ??, ä, ??, é, ??, ö, ??, ü, ??, «, » Help please!

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  • inet_ntoa problem

    - by codingfreak
    Hi I am declaring following variables unsigned long dstAddr; unsigned long gateWay; unsigned long mask; These variables contains ipaddresses in network byte order. So when I am trying to print them using inet_ntoa function for mask variable sometimes it is printing strange values printf("%s\t%s\t%s\t",inet_ntoa(dstAddr),inet_ntoa(gateWay),inet_ntoa(mask)); 192.168.122.0 0.0.0.0 0.255.255.255 but it should be 192.168.122.0 0.0.0.0 255.255.255.0 So is this because of inet_ntoa ??

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  • C++'s char * by swig got problem in Python 3.0

    - by gpliu3
    Our C++ lib works fine with Python2.4 using Swig, returning a C++ char* back to a python str. But this solution hit problem in Python3.0, error is: Exception=(, UnicodeDecodeError('utf8', b"\xb6\x9d\xa.....",0, 1, 'unexpected code byte') Our definition is like(working fine in Python 2.4): void cGetPubModulus( void* pSslRsa, char* cMod, int* nLen ); %include "cstring.i" %cstring_output_withsize( char* cMod, int* nLen ); Suspect swig is doing a Bytes-Str conversion automatically. In python2.4 it can be implicit but in Python3.0 it's no long allowed.. Anyone got a good idea? thanks

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  • Why do C++ streams use char instead of unsigned char?

    - by Johannes Schaub - litb
    I've always wondered why the C++ Standard library has instantiated basic_[io]stream and all its variants using the char type instead of the unsigned char type. char means (depending on whether it is signed or not) you can have overflow and underflow for operations like get(), which will lead to implementation-defined value of the variables involved. Another example is when you want to output a byte, unformatted, to an ostream using its put function. Any ideas? Note: I'm still not really convinced. So if you know the definitive answer, you can still post it indeed.

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  • java best way to transfer images

    - by d.raev
    I have a application that reads a PDF, transform the content to collection of TIF files, and send them to Glass Fish Server for saving. Usually there are 1-5 pages and it works nice, but when I got a input file with 100+ pages... it throws error on the transfer. Java heap space at java.util.Arrays.copyOf(Arrays.java:2786) at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:94) Putting more resources is not a good option in my case, so I m looking for a way to optimize it somehow. I store the data in: HashMap<TifProfile, List<byte[]> Is there a better way to store or send them ? EDIT I did some tests and the final collections for PDF with 80 pages has size over 280mb (240 tiffs with different settings inside)

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  • Aes key length significance/implications

    - by cppdev
    Hi, I am using a AES algorithm in my application for encrypting plain text. I am trying to use a key which is a six digit number. But as per the AES spec, the key should be minimum sixteen bytes in length. I am planning to append leading zeros to my six digit number to make it a 16 byte and then use this as a key. Would it have any security implications ? I mean will it make my ciphertext more prone to attacks. Please help.

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  • Adobe Air: Read and Write MP3 or JPG from local directory and switch bytes

    - by Max
    I would like to make my local jpg and mp3 files kind of unreadable (without encoding) by just putting the first 100 bytes from the beginning of the file to the end and then saving the file with a .dat extension. I know I have to use the byte array but can't get it work. I would also need then a small function to read that file and put the 100bytes back to the front so that I can play/display the file. It would be great if you could post the whole function because I am quite new to Air so that I fully understand. Thank You!!!!

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  • Arrays/Lists and computing hashvalues (VB, C#)

    - by Jeffrey Kern
    I feel bad asking this question but I am currently not able to program and test this as I'm writing this on my cell-phone and not on my dev machine :P (Easy rep points if someone answers! XD ) Anyway, I've had experience with using hashvalues from String objects. E.g., if I have StringA and StringB both equal to "foo", they'll both compute out the same hashvalue, because they're set to equal values. Now what if I have a List, with T being a native data type. If I tried to compute the hashvalue of ListA and ListB, assuming that they'd both be the same size and contain the same information, wouldn't they have equal hashvalues as well? Assuming as sample dataset of 'byte' with a length of 5 {5,2,0,1,3}

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