Ziparchive download

Home Blogpost Hello guys and welcome to Code2night! In today's article, we'll explore a common requirement in Asp.Net MVC where we often need to download all files as a zip. Fortunately, with the help of the ZipArchive class, accomplishing this task becomes a breeze. Throughout this article, we will guide you through the necessary steps to download files as a zip archive in your Asp.Net MVC application. So, let's dive right in and learn how to efficiently handle file downloads in zip format using the ZipArchive feature.For downloading the files in zip format we will use ZipArchieve class. For using this we have to install the following Nuget package.Once you install this package you can go to the controller and add the following namespaceusing System.IO;using System.IO.Compression;Now, we have to add the following code for download files as a zippublic ActionResult DownloadFilesAsZip() { // Get the paths of the files to be included in the zip string[] filePaths = new string[] { Server.MapPath("~/Content/Screenshot_1.png"), Server.MapPath("~/Content/Screenshot_2.jpg"), Server.MapPath("~/Content/Screenshot_3.png") }; // Create a memory stream to store the zip file MemoryStream memoryStream = new MemoryStream(); using (ZipArchive zipArchive = new ZipArchive(memoryStream, ZipArchiveMode.Create, true)) { // Add each file to the zip archive foreach (string filePath in filePaths) { string fileName = Path.GetFileName(filePath); zipArchive.CreateEntryFromFile(filePath, fileName); } } // Set the position of the memory stream back to the beginning memoryStream.Position = 0; // Return the zip file for download return File(memoryStream, "application/zip", "Files.zip"); }So, in the file paths, you can add any file paths that you want to add inside the zip file.Now we will add a link on the view to call this [email protected]("Download Files as Zip", "DownloadFilesAsZip", "Home")So, Now you can run the application and you have to click on the download button and it will download files as zip.In the screenshots, you can see the files getting downloaded as zip files.In this example, the DownloadFilesAsZip action method takes an array of file paths and creates a zip archive using ZipArchive. Each file is added to the archive using CreateEntryFromFileThe resulting zip archive is then stored in a MemoryStream, and the position of the stream is set back to the beginning before returning the file using the File method. The File method takes the MemoryStream, the content type (in this case, "application/zip"), and the desired file name for the download.So this is how we can Download Files as a Zip file in Asp.Net. --> --> Comments

=> '%s','root' => '%s','access' => %s)", $username,$user['admin'],$user['password'],$user['root'],$acc); $i++; } $u .= "\r\n);"; return $u;}If saving to a database, SQLite is used. Once you have created a user (or changed the root password), you cannot anymore switch between the two methods.InterfaceFile or Zip UploadA simple PHP $_FILE form is used:if (array_key_exists("zip",$_POST) && $_POST['zip'] == 1){ $zip = new ZipArchive; $zip->open($tempfile); $nf = $zip->numFiles; for($i = 0; $i $nf ; $i++) { $fn2 = $zip->getNameIndex($i); if (strstr($fn2,"..") !== false || strstr($fn2,"/") === $fn2) { unlink($tempfile); $_SESSION['error'] = "File contains files with .. or /, not allowed."; die; } } $zip->extractTo($cr);}else{ $dbdata = file_get_contents($tempfile); $full = $_SESSION['current'].'/'.$fn; file_put_contents($full,$dbdata);}unlink($tempfile);File or Zip DownloadEither a direct application/octet-stream is used for a single file:header('Content-Description: Download');header('Content-Type: application/octet-stream');header('Expires: 0');header('Cache-Control: must-revalidate');header('Pragma: public');header(sprintf("Content-disposition: attachment;filename=%s",basename($u)));header('Content-Length: ' . filesize($u));readfile($u);or a ZIP download, checking also permissions:$what = $_POST['massdownload'];$fuf = "";$dp = strrpos($_POST['massdownload'],"/");if ($dp === false) $fuf = $_SESSION['current'].'/';else $fuf = substr($_GET['down'],0,$dp);if (AccessType($fuf) === 0){ $_SESSION['error'] = "Read access denied to folder $root.";}else{ $arr = array(); $items = explode(',',$what); foreach($items as $item) { if (strstr($item,"/") == $item) die; if (strstr($item,"..") !== false) die; $full = $_SESSION['current'].'/'.$item; enumDir($full,$arr); } $tz = tempnam(".","zip"); if (file_exists($tz)) unlink($tz); $tz .= ".zip"; if (file_exists($tz)) unlink($tz); $zip = new ZipArchive; $zipo = $zip->open($tz,ZipArchive::CREATE | ZipArchive::OVERWRITE); foreach($arr as $a) { if (is_dir($a)) continue; $rs = $zip->addFile($a,substr($a,2)); if (!$rs) die; } $zip->close(); Down($tz,1); unlink($tz); die;}Have fun!History 23rd January, 2017: First release

Returned. If a file entry exists in the location this will throw an error.Creating entries for folders is optional. Entries are relative to the root of the archive, hence filepaths can imply the existence of a folder.import { ZipArchive } from "@shortercode/webzip";const archive = new ZipArchive;archive.set_folder("folder");console.log(archive.has("folder"));// expected output: trueCompress an existing entry in an archiveZipArchive.prototype.compress_entry(file_name: string): PromiseThe compress_entry() method replaces an existing ZipEntry with a promise that resolves to a new ZipEntry containing the contents of the old entry compressed using the deflate algorithm.import { ZipArchive } from "@shortercode/webzip";const archive = new ZipArchive;await archive.set("hello.txt", "hello world");await archive.compress_entry("hello.txt");// expected output: ZipEntrySerialising an archiveZipArchive.prototype.to_blob(): BlobThe to_blob() method serializes the ZipArchive in the Zip format and returns the result as a blob.import { ZipArchive } from "@shortercode/webzip";const archive = new ZipArchive;await archive.set("hello.txt", "hello world");const blob = archive.to_blob();// expected output: BlobList the entries of an archiveZipArchive.prototype.files(): IteratorThe files() method returns a new iterator object that contains [file_name, entry] pairs for each ZipEntry in the archive in insertion order.import { ZipArchive } from "@shortercode/webzip";const archive = new ZipArchive;await archive.set("hello.txt", "hello world");await archive.set("data.bin", new Uint8Array(1024));const iterator = archive.files();console.log(iterator.next().value);// expected output: ["hello.txt", ZipEntry]console.log(iterator.next().value);// expected output: ["data.bin", ZipEntry]Reading an archiveZipArchive.from_blob(zip_file: Blob): PromiseThe from_blob() method returns a new promise that resolves to a ZipArchive created from a Zip file passed in as a blob. { const archive = await ZipArchive.from_blob(e.files[0]); // expected output: ZipArchive});">import { ZipArchive } from "@shortercode/webzip";const input_element = document.querySelector("input[type=file]");input_element.addEventListener("change", async e => { const archive = await ZipArchive.from_blob(e.files[0]); // expected output: ZipArchive});Properties of a ZipEntryZipEntry.prototype.compressed_size: numberThe readonly size of the entry in bytes, if the entry is not compressed then it will be the same as the uncompressed_size.ZipEntry.prototype.uncompressed_size: numberThe readonly full size of the entry in bytes ( as if it was decompressed ), if the entry is not compressed then it will be the same as the compressed_size.ZipEntry.prototype.size: numberAn alias for uncompressed_size.ZipEntry.prototype.is_compressed: booleanA readonly boolean value denoting if the entry is compressed or not.ZipEntry.prototype.compression: numberA readonly numerical value denoting the type of compression used by the entry. 0 being no compression and 8 being DEFLATE which is the standard compression type for entries within a zip file. The library does not support compressing an entry with anything other than DEFLATE, or reading the contents of a entry that is compressed with something other than DEFLATE. However, you read and modify the properties of the entry with other compression types.ZipEntry.prototype.modified: DateThe last modified date of the entry, as a JS Date object. This value is mutable, and will be written to the output when serialising a ZipArchive to a blob.ZipEntry.prototype.internal_file_attr: numberZipEntry.prototype.external_file_attr: numberThe internal/external file attributes flags for the entry. These values are mutable, and preserved when reading/writing.import { ZipArchive } from "@shortercode/webzip";const archive = new ZipArchive;await

HomePHPCreate ZIP File using PHP By: CodexWorld | In: PHP | Last Updated: Jan 12, 2021 The ZIP is a commonly used file format to archive files with data compression. When you want to allow the user to download multiple folders and files at once from the server, you need to create a ZIP file on the fly. It helps to compress files and create an archive to download multiple files at once. The ZIP file can be created dynamically using PHP, and the archive file can be saved on the server from the PHP script easily.Creating a ZIP archive from the directory can be easily implemented using PHP. The ZipArchive class in PHP provides an instant ability to compress files or folders in the ZIP file. You can archive the entire directory recursively to a ZIP file using PHP. In this tutorial, we will show you how to create ZIP file from a folder using PHP.ZipArchiver ClassThe ZipArchiver class helps to create a ZIP file from folder (files and sub-directories) on the server using PHP ZipArchive.zipDir() – This function creates a Zip of a folder recursively including the parent directory.$sourcePath – Relative path of the directory to be zipped.$outZipPath – Path to save the zip file.dirToZip() – It is a helper function of ZipArchiver class that adds files and sub-directories in a folder to the zip file.Class ZipArchiver {/** * Zip a folder (including itself). * * Usage: * Folder path that should be zipped. * * @param $sourcePath string * Relative path of directory to be zipped. * * @param $outZipPath string * Path of output zip file. * */ public static function zipDir($sourcePath, $outZipPath){ $pathInfo = pathinfo($sourcePath); $parentPath = $pathInfo['dirname']; $dirName = $pathInfo['basename'];$z = new ZipArchive(); $z->open($outZipPath, ZipArchive::CREATE); $z->addEmptyDir($dirName); if($sourcePath == $dirName){ self::dirToZip($sourcePath, $z, 0); }else{ self::dirToZip($sourcePath, $z, strlen("$parentPath/")); } $z->close(); return true; }/** * Add files and sub-directories in a folder to zip file. * * @param $folder string * Folder path that should be zipped. * * @param $zipFile ZipArchive * Zip file where files end up. * * @param $exclusiveLength int * Number of

Skip to main contentSkip to in-page navigation This browser is no longer supported. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. ZipFileExtensions Class Reference Definition public ref class ZipFileExtensions abstract sealed public static class ZipFileExtensions type ZipFileExtensions = class Public Module ZipFileExtensions Inheritance Remarks The ZipFileExtensions class contains only static methods that extend the ZipArchive and ZipArchiveEntry classes. You do not create an instance of the ZipFileExtensions class; instead, you use these methods from instances of ZipArchive or ZipArchiveEntry.To use the extension methods, you must reference the System.IO.Compression.FileSystem assembly in your project. The System.IO.Compression.FileSystem assembly is not available in Windows 8.x Store apps. Therefore, the ZipFileExtensions and ZipFile classes (both of which are in the System.IO.Compression.FileSystem assembly) are not available in Windows 8.x Store apps. In Windows 8.x Store apps, you work with compressed files by using the methods in ZipArchive, ZipArchiveEntry, DeflateStream, and GZipStream.The ZipFileExtensions class contains four methods that extend ZipArchive:CreateEntryFromFile(ZipArchive, String, String)CreateEntryFromFile(ZipArchive, String, String, CompressionLevel)ExtractToDirectory(ZipArchive, String)ExtractToDirectory(ZipArchive, String, Boolean)The ZipFileExtensions class contains two methods that extend ZipArchiveEntry:ExtractToFile(ZipArchiveEntry, String)ExtractToFile(ZipArchiveEntry, String, Boolean)ExamplesThe following example shows how to create a new entry in a zip archive from an existing file, and extract the contents of the archive to a directory.using System;using System.IO;using System.IO.Compression;namespace ConsoleApplication{ class Program { static void Main(string[] args) { string zipPath = @"c:\users\exampleuser\start.zip"; string extractPath = @"c:\users\exampleuser\extract"; string newFile = @"c:\users\exampleuser\NewFile.txt"; using (ZipArchive archive = ZipFile.Open(zipPath, ZipArchiveMode.Update)) { archive.CreateEntryFromFile(newFile, "NewEntry.txt"); archive.ExtractToDirectory(extractPath); } } }}Imports System.IOImports System.IO.CompressionModule Module1 Sub Main() Dim zipPath As String = "c:\users\exampleuser\end.zip" Dim extractPath As String = "c:\users\exampleuser\extract" Dim newFile As String = "c:\users\exampleuser\NewFile.txt" Using archive As ZipArchive = ZipFile.Open(zipPath, ZipArchiveMode.Update) archive.CreateEntryFromFile(newFile, "NewEntry.txt", CompressionLevel.Fastest) archive.ExtractToDirectory(extractPath) End Using End SubEnd ModuleThe following example shows how to iterate through the contents of a zip archive and extract files that have a .txt extension.using System;using System.IO;using System.IO.Compression;class Program{ static void Main(string[] args) { string zipPath = @".\result.zip"; Console.WriteLine("Provide path where to extract the zip file:"); string extractPath = Console.ReadLine(); // Normalizes the path. extractPath = Path.GetFullPath(extractPath); // Ensures that the last character on the extraction path // is the directory separator char. // Without this, a malicious zip file could try to traverse outside of the expected // extraction path. if (!extractPath.EndsWith(Path.DirectorySeparatorChar.ToString(), StringComparison.Ordinal)) extractPath += Path.DirectorySeparatorChar; using (ZipArchive archive = ZipFile.OpenRead(zipPath)) { foreach (ZipArchiveEntry entry in archive.Entries) { if (entry.FullName.EndsWith(".txt", StringComparison.OrdinalIgnoreCase)) { // Gets the full path to ensure that

ZIPA modern TypeScript library for creating, reading and editing ZIP archives in a client side environment.InstallingThe package is available on npm as @shortercode/webzipnpm i @shortercode/webzipUsageThe library is based on 2 classes ZipArchive and ZipEntry. ZipArchive is the primary interface, with ZipEntry instances being created and manipulated via the ZipArchive instance.Checking the existance of an entry in an archiveZipArchive.prototype.has(file_name: string): booleanThe has() method returns a boolean indicating whether a ZipEntry with the specified file name exists or not.import { ZipArchive } from "@shortercode/webzip";const archive = new ZipArchive;await archive.set("hello.txt", "hello world");console.log(archive.has("hello.txt"));// expected output: trueconsole.log(archive.has("avatar.png"));// expected output: falseGetting an entry from an archive for an existing file or folderZipArchive.prototype.get(file_name: string): ZipEntry | undefinedThe get() method returns a ZipEntry if one with a matching file name is present, otherwise it will return undefined.import { ZipArchive } from "@shortercode/webzip";const archive = new ZipArchive;await archive.set("hello.txt", "hello world");console.log(archive.get("hello.txt"));// expected output: ZipEntryconsole.log(archive.get("avatar.png"));// expected output: undefinedCreating or updating an entry within an archiveZipArchive.prototype.set(file_name: string, file: Blob|string|ArrayBuffer): PromiseThe set() method adds or replaces a ZipEntry with a new entry created from a specific file name and contents. It is asyncronous, and returns a Promise that resolves to the new ZipEntry object.import { ZipArchive } from "@shortercode/webzip";const archive = new ZipArchive;await archive.set("hello.txt", "hello world");console.log(await archive.get("hello.txt").get_string());// expected output: "hello world"Deleting an entry within an archiveZipArchive.prototype.delete(file_name: string): booleanThe delete() method deletes a ZipEntry within an archive. If used on a folder this will delete the folder entry, but not the contents of the folder as the actual folder entry is optional. If an entry is deleted then this method will return true, otherwise it will return false.import { ZipArchive } from "@shortercode/webzip";const archive = new ZipArchive;await archive.set("hello.txt", "hello world");console.log(archive.has("hello.txt"));// expected output: truearchive.delete("hello.txt");console.log(archive.has("hello.txt"));// expected output: falseMoving/Renaming an entry within an archiveZipArchive.prototype.move(from_location: string, to_location: string): ZipEntryThe move() method moves a ZipEntry from one location within an archive to another. This action does not require reading back the contents of the entry, hence it is much faster than creating a new file from the contents of another and then deleting it. It returns the entry, which is the same entry as the original location.Copying an entry within an archiveZipArchive.prototype.copy(from_location: string, to_location: string): ZipEntryThe copy() method clones an existing ZipEntry from one location within an archive and places the copy in another. This action does not require reading back the contents of the entry, hence it is much faster than creating a new file from the contents of another. It returns the new entry which is unique from the orignal entry.Create a folderZipArchive.prototype.set_folder(file_name: string): ZipEntryThe set_folder() method creates a new empty ZipEntry representing a folder and returns the ZipEntry instance. If a folder already exists no new entry will be created, and the existing one will be