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  • Create Zip file from stream and download it

    - by Navid Farhadi
    I have a DataTable that i want to convert it to xml and then zip it, using DotNetZip. finally user can download it via Asp.Net webpage. My code in below dt.TableName = "Declaration"; MemoryStream stream = new MemoryStream(); dt.WriteXml(stream); ZipFile zipFile = new ZipFile(); zipFile.AddEntry("Report.xml", "", stream); Response.ClearContent(); Response.ClearHeaders(); Response.AppendHeader("content-disposition", "attachment; filename=Report.zip"); zipFile.Save(Response.OutputStream); //Response.Write(zipstream); zipFile.Dispose(); the xml file in zip file is empty.

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  • Extract files from ZIP file with VBScript

    - by Tester101
    When extracting files from a ZIP file I was using the following. Sub Unzip(strFile) ' This routine unzips a file. NOTE: The files are extracted to a folder ' ' in the same location using the name of the file minus the extension. ' ' EX. C:\Test.zip will be extracted to C:\Test ' 'strFile (String) = Full path and filename of the file to be unzipped. ' Dim arrFile arrFile = Split(strFile, ".") Set fso = CreateObject("Scripting.FileSystemObject") fso.CreateFolder(arrFile(0) & "\ ") pathToZipFile= arrFile(0) & ".zip" extractTo= arrFile(0) & "\ " set objShell = CreateObject("Shell.Application") set filesInzip=objShell.NameSpace(pathToZipFile).items objShell.NameSpace(extractTo).CopyHere(filesInzip) fso.DeleteFile pathToZipFile, True Set fso = Nothing Set objShell = Nothing End Sub 'Unzip This was working, but now I get a "The File Exists" Error. What is the reason for this? Are there any alternatives?

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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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  • Reading files from an embedded ZIP archive

    - by aix
    I have a ZIP archive that's embedded inside a larger file. I know the archive's starting offset within the larger file and its length. Are there any Java libraries that would enable me to directly read the files contained within the archive? I am thinking along the lines of ZipFile.getInputStream(). Unfortunately, ZipFile doesn't work for this use case since its constructors require a standalone ZIP file. For performance reasons, I cannot copy the ZIP achive into a separate file before opening it. edit: Just to be clear, I do have random access to the file.

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  • Comparing zip/compression utilities

    - by Grant Palin
    I've used WinZip, WinRar, and 7zip for packaging and compression. I know the first two are payware, and the last is open source. Despite that, they all seem to serve the same overall purpose. Are there any other distinguishing characteristics that make any of the options stand out? I'm not really looking for a "best" package, but would like to know of noteworthy differences between the common tools. For what it's worth, I do seem to like WinRar. Not sure why, but there it is. If it matters, I'm using Windows 7.

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  • Problem with unpacking zip archive with UTF-8 file names in OS X if zip was made in Windows

    - by Andrei
    I have packed my files in Windows 7 using Total Commander asking to use UTF-8 for file names. Then I tried to unpack my files in OS X, but Cyrillic names were messed. I have tried most programs -- none has helped me, so I had to use Parallels with Windows and Total Commander to get what I want. Is there any other way to do it? Is it a fault of Total Commander or I need to tune OS X settings?

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  • Creating a zip archive of the maven "target" directory

    - by Yaneeve
    Hi all, I am wish to create a zip archive of my "target" directory (${project.build.directory). using the maven-assembly-plugin seems to me like overkill for such a simple task (and a bit complicated - why must I use another file, the assembly descriptor, for such a task) I can't locate the seemingly more simple maven-zip-plugin in the http://repo1.maven.org/maven2 repository. Any input?

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  • What is the smallest, legal zip/jar file?

    - by vkraemer
    I hate generating an exception for things that I can simply test with an if statement. I know that a zero length zip/jar will trigger an exception if you try to access it using the java.util.zip/java.util.jar APIs. So, it seems like there should be a smallest file that these utility APIs are capable of working with.

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  • SharePoint problem: opening a office 2007 document tries to open as a zip file

    - by MK
    I have a number of Office 2007 documents (.pptx, .docx, .xlsx) in a SharePoint document library and when user tries to open the documents, it tries to open as a zip file. This happens to some users, but not all. I posted this issue at http://superuser.com/questions/110211/why-office-2007-documents-open-as-a-zip-file, but I failed to mention that it was related to the Sharepoint so it got moved to the superuser.com Please help.

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  • Extracting specific files from ZIP in PHP

    - by Michael
    If I have a ZIP file whose structure is: -directory1 DIR -files in here -directory2 DIR -more files in here Using pclzip.lib.php how can I open up this ZIP file and extract directory1 (recursive) into a directory and then extract directory2 (recursive) into another directory.

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  • Blackberry - Programmatically extract/open zip file

    - by KKlucznik
    I have looked online with mixed results, but is there a way to programmatically extract a zip file on the BB? Very basic my app will display different encrypted file types, and those files are delivered in a zip file. My idea was to have the user browse to the file on their SDCard, select it, and I extract what i need as a stream from the file. is this possible?

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  • Remove an empty directory from a ZIP file with PHP

    - by desolat
    PHP brings a class for ZIP file manipulation. It also allows the creation of directories with addEmptyDir() and the deletion of an entry with deleteName(). But the deletion does not work on directories (empty or not). Is there any way to delete empty folders in a ZIP file (prefered is buildin PHP functionality)?

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  • How to deploy a rar file to jboss

    - by Joshua
    Refer original post here for a reference to the original issue. What plugin should I use to deploy the jackrabbit rar as a separate entity to the jboss installation. I tried the rar module within the maven-ear-plugin which was actually packaging this within the ear file and the rar plugin which seems to be used for packaging a rar. Currently I am using the antrun plugin to deploy the rar file and it's associated ds.xml, is there a different plugin to automate direct deployment.

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  • Optimization of Function with Dictionary and Zip()

    - by eWizardII
    Hello, I have the following function: def filetxt(): word_freq = {} lvl1 = [] lvl2 = [] total_t = 0 users = 0 text = [] for l in range(0,500): # Open File if os.path.exists("C:/Twitter/json/user_" + str(l) + ".json") == True: with open("C:/Twitter/json/user_" + str(l) + ".json", "r") as f: text_f = json.load(f) users = users + 1 for i in range(len(text_f)): text.append(text_f[str(i)]['text']) total_t = total_t + 1 else: pass # Filter occ = 0 import string for i in range(len(text)): s = text[i] # Sample string a = re.findall(r'(RT)',s) b = re.findall(r'(@)',s) occ = len(a) + len(b) + occ s = s.encode('utf-8') out = s.translate(string.maketrans("",""), string.punctuation) # Create Wordlist/Dictionary word_list = text[i].lower().split(None) for word in word_list: word_freq[word] = word_freq.get(word, 0) + 1 keys = word_freq.keys() numbo = range(1,len(keys)+1) WList = ', '.join(keys) NList = str(numbo).strip('[]') WList = WList.split(", ") NList = NList.split(", ") W2N = dict(zip(WList, NList)) for k in range (0,len(word_list)): word_list[k] = W2N[word_list[k]] for i in range (0,len(word_list)-1): lvl1.append(word_list[i]) lvl2.append(word_list[i+1]) I have used the profiler to find that it seems the greatest CPU time is spent on the zip() function and the join and split parts of the code, I'm looking to see if there is any way I have overlooked that I could potentially clean up the code to make it more optimized, since the greatest lag seems to be in how I am working with the dictionaries and the zip() function. Any help would be appreciated thanks!

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  • Extract files in rar archive without having some previous files.

    - by Aria
    I have a big rar archive which is split into 700mb parts. I only have part 5 and 6 and there is a 40mb file in there that I wanna extract using Winrar. I know the whole file is stored in part 5 because when I open part 5, that file gets listed (and many other files). But I can't extract any of them, cause it asks for previous archive parts which I'm sure it really doesn't need. Is there a way to do that?

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  • What do I need in order to extract and combine text files from multiple ZIP files, via command line?

    - by Iszi
    I've got an interesting scripting challenge in front of me. I'm fairly certain there's a way to do it, but I feel like I'm probably lacking some particular tools and/or functional knowledge. There's some fifty-plus ZIP files that each contain, among other things, text files that need to be merged with one another. The structure is something like this: C:\Reports\FirstJob-1.zip |-MyName |-FirstJob |-1 |-[Some other folders] |-TXTReports |-English |-[Some other files] |-Report.txt C:\Reports\FirstJob-2.zip |-MyName |-FirstJob |-1 |-[Some other folders] |-TXTReports |-English |-[Some other files] |-Report.txt C:\Reports\SecondJob-1.zip |-MyName |-SecondJob |-1 |-[Some other folders] |-TXTReports |-English |-[Some other files] |-Report.txt If I had all the Report.txt files in one regular folder, and uniquely named, I could probably just write a FOR statement that targets *.txt and runs something like type filename.txt >> Consolidated.txt on each. However, these all have the same file name and are embedded deep within separate ZIP files. The potentially useful tools I currently have at my disposal are Windows XP Professional SP3, PowerShell, and WinZip. I'd rather not download or install anything else, but I do understand that third-party tools (or additional tools from Microsoft or WinZip) may be necessary. Whatever tools I use should run natively in Windows. I really don't want to have to mess with Cygwin or other emulators on this system. At the very least, I need a tool that will allow me to analyze and manipulate ZIP files from the command line. Also, are there any other particular complications to this that I've not yet thought of?

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  • Use php to zip large files

    - by Joseph
    Hi, I have a php form that has a bunch of checkboxes that all contain links to files. Once a user clicks on which checkboxes (files) they want, it then zips up the files and forces a download. I got a simple php zip force download to work, but when one of the files is huge or if someone lets say selects the whole list to zip up and download, my server errors out. I understand that I can increase the server size, but are there any other ways? Thanks!

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  • ASP.NET Download All Files as Zip

    - by Ronnie Overby
    I have a folder on my web server that has hundreds of mp3 files in it. I would like to provide the option for a user to download a zipped archive of every mp3 in the directory from a web page. I want to compress the files programmatically only when needed. Because the zip file will be quite large, I am thinking that I will need to send the zip file to the response stream as it is being zipped, for performance reasons. Is this possible? How can I do it?

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  • java servlet: generate zip file from BLOBs

    - by Zack
    I'm trying to zip a large number of pdf files (stored as BLOBs in the DB) and then return the zip as an attachment to the user. What's the best way to do this without running into memory issues? Another note: I actually need to merge some PDFs prior to adding them to the ZipOutputStream. Therefore, a couple PDFs will need to be stored in memory at a time. I assume it would be best to then store them as temporary files on the server before zipping them all?

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  • uploading zip files in codeigniter won't work

    - by krike
    I have created a helper that requires some parameters and should upload a file, the function works for images however not for zip files. I searched on google and even added a MY_upload.php - http://codeigniter.com/bug_tracker/bug/6780/ however I still have the problem so I used print_r to display the array of the uploaded files, the image is fine however the zip array is empty: Array ( [file_name] => [file_type] => [file_path] => [full_path] => [raw_name] => [orig_name] => [file_ext] => [file_size] => [is_image] => [image_width] => [image_height] => [image_type] => [image_size_str] => ) Array ( [file_name] => 2385b959279b5e3cd451fee54273512c.png [file_type] => image/png [file_path] => I:/wamp/www/e-commerce/sources/images/ [full_path] => I:/wamp/www/e-commerce/sources/images/2385b959279b5e3cd451fee54273512c.png [raw_name] => 2385b959279b5e3cd451fee54273512c [orig_name] => 1269770869_Art_Artdesigner.lv_.png [file_ext] => .png [file_size] => 15.43 [is_image] => 1 [image_width] => 113 [image_height] => 128 [image_type] => png [image_size_str] => width="113" height="128" ) this is the function helper function multiple_upload($name = 'userfile', $upload_dir = 'sources/images/', $allowed_types = 'gif|jpg|jpeg|jpe|png', $size) { $CI =& get_instance(); $config['upload_path'] = realpath($upload_dir); $config['allowed_types'] = $allowed_types; $config['max_size'] = $size; $config['overwrite'] = FALSE; $config['encrypt_name'] = TRUE; $ffiles = $CI->upload->data(); echo "<pre>"; print_r($ffiles); echo "</pre>"; $CI->upload->initialize($config); $errors = FALSE; if(!$CI->upload->do_upload($name))://I believe this is causing the problem but I'm new to codeigniter so no idea where to look for errors $errors = TRUE; else: // Build a file array from all uploaded files $files = $CI->upload->data(); endif; // There was errors, we have to delete the uploaded files if($errors): @unlink($files['full_path']); return false; else: return $files; endif; }//end of multiple_upload() and this is the code in my controller if(!$s_thumb = multiple_upload('small_thumb', 'sources/images/', 'gif|jpg|jpeg|jpe|png', 1024)): //http://www.matisse.net/bitcalc/ $data['feedback'] = '<div class="error">Could not upload the small thumbnail!</div>'; $error = TRUE; endif; if(!$main_file = multiple_upload('main_file', 'sources/items/', 'zip', 307200)): $data['feedback'] = '<div class="error">Could not upload the main file!</div>'; $error = TRUE; endif;

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  • Converting Multiple files to zip and saving them in ownCloud

    - by user1055380
    I wanted to convert an array with some css, js and html files into a zip file and save them in ownCloud (it has it's own framework but it's knowledge is not required.) What I am saving is an infinite loop of zip files, as in, a zip inside a zip so I can't even check that the code is working correctly or not. Please help. Here is the link to the code. <?php /* creates a compressed zip file */ $filename = $_GET["filename"]; function create_zip($files = array(),$destination = '',$overwrite = false) { //if the zip file already exists and overwrite is false, return false if(file_exists($destination) && !$overwrite) { return false; } //vars $valid_files = array(); //if files were passed in... if(is_array($files)) { //cycle through each file foreach($files as $file => $local) { //make sure the file exists if(file_exists($file)) { $valid_files[$file] = $local; } } } //if we have good files... if(count($valid_files)) { //create the archive $zip = new ZipArchive(); if($zip->open($destination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) { return false; } //add the files foreach($valid_files as $file => $local) { $zip->addFile($file, $local); } //debug //echo 'The zip archive contains ',$zip->numFiles,' files with a status of ',$zip->status; //close the zip -- done! $zip->close(); //check to make sure the file exists return file_exists($destination); } else { return false; } } $files_to_zip = array( 'apps/impressionist/css/mappingstyle.css' => '/css/mappingstyle.css', 'apps/impressionist/css/style.css' => '/css/style.css', 'apps/impressionist/js/jquery.js' => '/scripts/jquery.js', 'apps/impressionist/js/impress.js' => '/scripts/impress.js', realpath('apps/impressionist/output/'.$filename.'.html') => $filename.'.html' ); //if true, good; if false, zip creation failed $result = create_zip($files_to_zip, $filename.'.zip'); $save_file = OC_App::getStorage('impressionist'); $save_file ->file_put_contents($filename.'.zip',$files_to_zip); ?>

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  • Implementation of ZipCrypto / Zip 2.0 encryption in java

    - by gomesla
    I'm trying o implement the zipcrypto / zip 2.0 encryption algoritm to deal with encrypted zip files as discussed in http://www.pkware.com/documents/casestudies/APPNOTE.TXT I believe I've followed the specs but just can't seem to get it working. I'm fairly sure the issue has to do with my interpretation of the crc algorithm. The documentation states CRC-32: (4 bytes) The CRC-32 algorithm was generously contributed by David Schwaderer and can be found in his excellent book "C Programmers Guide to NetBIOS" published by Howard W. Sams & Co. Inc. The 'magic number' for the CRC is 0xdebb20e3. The proper CRC pre and post conditioning is used, meaning that the CRC register is pre-conditioned with all ones (a starting value of 0xffffffff) and the value is post-conditioned by taking the one's complement of the CRC residual. Here is the snippet that I'm using for the crc32 public class PKZIPCRC32 { private static final int CRC32_POLYNOMIAL = 0xdebb20e3; private int crc = 0xffffffff; private int CRCTable[]; public PKZIPCRC32() { buildCRCTable(); } private void buildCRCTable() { int i, j; CRCTable = new int[256]; for (i = 0; i <= 255; i++) { crc = i; for (j = 8; j > 0; j--) if ((crc & 1) == 1) crc = (crc >>> 1) ^ CRC32_POLYNOMIAL; else crc >>>= 1; CRCTable[i] = crc; } } private int crc32(byte buffer[], int start, int count, int lastcrc) { int temp1, temp2; int i = start; crc = lastcrc; while (count-- != 0) { temp1 = crc >>> 8; temp2 = CRCTable[(crc ^ buffer[i++]) & 0xFF]; crc = temp1 ^ temp2; } return crc; } public int crc32(int crc, byte buffer) { return crc32(new byte[] { buffer }, 0, 1, crc); } } Below is my complete code. Can anyone see what I'm doing wrong. package org.apache.commons.compress.archivers.zip; import java.io.IOException; import java.io.InputStream; public class ZipCryptoInputStream extends InputStream { public class PKZIPCRC32 { private static final int CRC32_POLYNOMIAL = 0xdebb20e3; private int crc = 0xffffffff; private int CRCTable[]; public PKZIPCRC32() { buildCRCTable(); } private void buildCRCTable() { int i, j; CRCTable = new int[256]; for (i = 0; i <= 255; i++) { crc = i; for (j = 8; j > 0; j--) if ((crc & 1) == 1) crc = (crc >>> 1) ^ CRC32_POLYNOMIAL; else crc >>>= 1; CRCTable[i] = crc; } } private int crc32(byte buffer[], int start, int count, int lastcrc) { int temp1, temp2; int i = start; crc = lastcrc; while (count-- != 0) { temp1 = crc >>> 8; temp2 = CRCTable[(crc ^ buffer[i++]) & 0xFF]; crc = temp1 ^ temp2; } return crc; } public int crc32(int crc, byte buffer) { return crc32(new byte[] { buffer }, 0, 1, crc); } } private static final long ENCRYPTION_KEY_1 = 0x12345678; private static final long ENCRYPTION_KEY_2 = 0x23456789; private static final long ENCRYPTION_KEY_3 = 0x34567890; private InputStream baseInputStream = null; private final PKZIPCRC32 checksumEngine = new PKZIPCRC32(); private long[] keys = null; public ZipCryptoInputStream(ZipArchiveEntry zipEntry, InputStream inputStream, String passwd) throws Exception { baseInputStream = inputStream; // Decryption // ---------- // PKZIP encrypts the compressed data stream. Encrypted files must // be decrypted before they can be extracted. // // Each encrypted file has an extra 12 bytes stored at the start of // the data area defining the encryption header for that file. The // encryption header is originally set to random values, and then // itself encrypted, using three, 32-bit keys. The key values are // initialized using the supplied encryption password. After each byte // is encrypted, the keys are then updated using pseudo-random number // generation techniques in combination with the same CRC-32 algorithm // used in PKZIP and described elsewhere in this document. // // The following is the basic steps required to decrypt a file: // // 1) Initialize the three 32-bit keys with the password. // 2) Read and decrypt the 12-byte encryption header, further // initializing the encryption keys. // 3) Read and decrypt the compressed data stream using the // encryption keys. // Step 1 - Initializing the encryption keys // ----------------------------------------- // // Key(0) <- 305419896 // Key(1) <- 591751049 // Key(2) <- 878082192 // // loop for i <- 0 to length(password)-1 // update_keys(password(i)) // end loop // // Where update_keys() is defined as: // // update_keys(char): // Key(0) <- crc32(key(0),char) // Key(1) <- Key(1) + (Key(0) & 000000ffH) // Key(1) <- Key(1) * 134775813 + 1 // Key(2) <- crc32(key(2),key(1) >> 24) // end update_keys // // Where crc32(old_crc,char) is a routine that given a CRC value and a // character, returns an updated CRC value after applying the CRC-32 // algorithm described elsewhere in this document. keys = new long[] { ENCRYPTION_KEY_1, ENCRYPTION_KEY_2, ENCRYPTION_KEY_3 }; for (int i = 0; i < passwd.length(); ++i) { update_keys((byte) passwd.charAt(i)); } // Step 2 - Decrypting the encryption header // ----------------------------------------- // // The purpose of this step is to further initialize the encryption // keys, based on random data, to render a plaintext attack on the // data ineffective. // // Read the 12-byte encryption header into Buffer, in locations // Buffer(0) thru Buffer(11). // // loop for i <- 0 to 11 // C <- buffer(i) ^ decrypt_byte() // update_keys(C) // buffer(i) <- C // end loop // // Where decrypt_byte() is defined as: // // unsigned char decrypt_byte() // local unsigned short temp // temp <- Key(2) | 2 // decrypt_byte <- (temp * (temp ^ 1)) >> 8 // end decrypt_byte // // After the header is decrypted, the last 1 or 2 bytes in Buffer // should be the high-order word/byte of the CRC for the file being // decrypted, stored in Intel low-byte/high-byte order. Versions of // PKZIP prior to 2.0 used a 2 byte CRC check; a 1 byte CRC check is // used on versions after 2.0. This can be used to test if the password // supplied is correct or not. byte[] encryptionHeader = new byte[12]; baseInputStream.read(encryptionHeader); for (int i = 0; i < encryptionHeader.length; i++) { encryptionHeader[i] ^= decrypt_byte(); update_keys(encryptionHeader[i]); } } protected byte decrypt_byte() { byte temp = (byte) (keys[2] | 2); return (byte) ((temp * (temp ^ 1)) >> 8); } @Override public int read() throws IOException { // // Step 3 - Decrypting the compressed data stream // ---------------------------------------------- // // The compressed data stream can be decrypted as follows: // // loop until done // read a character into C // Temp <- C ^ decrypt_byte() // update_keys(temp) // output Temp // end loop int read = baseInputStream.read(); read ^= decrypt_byte(); update_keys((byte) read); return read; } private final void update_keys(byte ch) { keys[0] = checksumEngine.crc32((int) keys[0], ch); keys[1] = keys[1] + (byte) keys[0]; keys[1] = keys[1] * 134775813 + 1; keys[2] = checksumEngine.crc32((int) keys[2], (byte) (keys[1] >> 24)); } }

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