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Remove unused zip archive and directory functions
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Tilman
parent
51051cb22d
commit
7a71c89ee5
1 changed files with 1 additions and 174 deletions
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@ -29,7 +29,7 @@ export const handler: Handlers<Data, FreshContextState> = {
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}
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// Construct the full directory path
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const directoryPath = join(parentPath, name) + '/';
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const directoryPath = `${join(parentPath, name)}/`;
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try {
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await ensureUserPathIsValidAndSecurelyAccessible(context.state.user.id, directoryPath);
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@ -72,176 +72,3 @@ export const handler: Handlers<Data, FreshContextState> = {
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}
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},
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};
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interface FileEntry {
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path: string;
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content: Uint8Array;
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isDirectory: boolean;
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}
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async function getDirectoryContentsRecursively(
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userId: string,
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directoryPath: string,
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parentPath = '',
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): Promise<FileEntry[]> {
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const entries: FileEntry[] = [];
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try {
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// Get directories in current path
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const directories = await DirectoryModel.list(userId, directoryPath);
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for (const directory of directories) {
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const fullDirPath = join(directoryPath, directory.directory_name) + '/';
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const relativePath = join(parentPath, directory.directory_name);
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// Add directory entry
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entries.push({
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path: relativePath + '/',
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content: new Uint8Array(0),
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isDirectory: true,
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});
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// Recursively get contents of subdirectory
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const subEntries = await getDirectoryContentsRecursively(
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userId,
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fullDirPath,
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relativePath,
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);
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entries.push(...subEntries);
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}
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// Get files in current path
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const files = await FileModel.list(userId, directoryPath);
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for (const file of files) {
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const fileResult = await FileModel.get(userId, directoryPath, file.file_name);
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if (fileResult.success && fileResult.contents) {
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const relativePath = join(parentPath, file.file_name);
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entries.push({
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path: relativePath,
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content: fileResult.contents as Uint8Array,
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isDirectory: false,
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});
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}
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}
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} catch (error) {
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console.error('Error getting directory contents:', error);
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}
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return entries;
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}
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async function createZipArchive(entries: FileEntry[], basePath: string): Promise<Uint8Array> {
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// Create a simple ZIP archive manually since we don't have a zip library
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// This is a basic implementation - in the future, we may want to consider using a robust library
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const encoder = new TextEncoder();
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const chunks: Uint8Array[] = [];
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let centralDirectory: Uint8Array[] = [];
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let offset = 0;
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for (const entry of entries) {
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const fileName = encoder.encode(entry.path);
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const fileData = entry.content;
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// Local file header
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const localHeader = new Uint8Array(30 + fileName.length);
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const headerView = new DataView(localHeader.buffer);
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headerView.setUint32(0, 0x04034b50, true); // Local file header signature
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headerView.setUint16(4, 20, true); // Version needed to extract
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headerView.setUint16(6, 0, true); // General purpose bit flag
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headerView.setUint16(8, 0, true); // Compression method (stored)
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headerView.setUint16(10, 0, true); // File last modification time
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headerView.setUint16(12, 0, true); // File last modification date
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headerView.setUint32(14, crc32(fileData), true); // CRC-32
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headerView.setUint32(18, fileData.length, true); // Compressed size
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headerView.setUint32(22, fileData.length, true); // Uncompressed size
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headerView.setUint16(26, fileName.length, true); // File name length
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headerView.setUint16(28, 0, true); // Extra field length
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localHeader.set(fileName, 30);
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chunks.push(localHeader);
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chunks.push(fileData);
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// Central directory file header
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const centralHeader = new Uint8Array(46 + fileName.length);
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const centralView = new DataView(centralHeader.buffer);
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centralView.setUint32(0, 0x02014b50, true); // Central file header signature
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centralView.setUint16(4, 20, true); // Version made by
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centralView.setUint16(6, 20, true); // Version needed to extract
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centralView.setUint16(8, 0, true); // General purpose bit flag
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centralView.setUint16(10, 0, true); // Compression method
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centralView.setUint16(12, 0, true); // File last modification time
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centralView.setUint16(14, 0, true); // File last modification date
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centralView.setUint32(16, crc32(fileData), true); // CRC-32
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centralView.setUint32(20, fileData.length, true); // Compressed size
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centralView.setUint32(24, fileData.length, true); // Uncompressed size
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centralView.setUint16(28, fileName.length, true); // File name length
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centralView.setUint16(30, 0, true); // Extra field length
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centralView.setUint16(32, 0, true); // File comment length
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centralView.setUint16(34, 0, true); // Disk number start
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centralView.setUint16(36, 0, true); // Internal file attributes
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centralView.setUint32(38, 0, true); // External file attributes
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centralView.setUint32(42, offset, true); // Relative offset of local header
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centralHeader.set(fileName, 46);
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centralDirectory.push(centralHeader);
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offset += localHeader.length + fileData.length;
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}
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// Central directory end record
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const centralDirData = new Uint8Array(centralDirectory.reduce((sum, arr) => sum + arr.length, 0));
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let centralOffset = 0;
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for (const dir of centralDirectory) {
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centralDirData.set(dir, centralOffset);
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centralOffset += dir.length;
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}
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const endRecord = new Uint8Array(22);
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const endView = new DataView(endRecord.buffer);
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endView.setUint32(0, 0x06054b50, true); // End of central directory signature
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endView.setUint16(4, 0, true); // Number of this disk
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endView.setUint16(6, 0, true); // Disk where central directory starts
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endView.setUint16(8, centralDirectory.length, true); // Central directory entries on this disk
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endView.setUint16(10, centralDirectory.length, true); // Total central directory entries
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endView.setUint32(12, centralDirData.length, true); // Central directory size
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endView.setUint32(16, offset, true); // Central directory offset
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endView.setUint16(20, 0, true); // ZIP file comment length
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// Combine all parts
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const totalLength = chunks.reduce((sum, chunk) => sum + chunk.length, 0) +
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centralDirData.length + endRecord.length;
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const result = new Uint8Array(totalLength);
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let resultOffset = 0;
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for (const chunk of chunks) {
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result.set(chunk, resultOffset);
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resultOffset += chunk.length;
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}
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result.set(centralDirData, resultOffset);
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resultOffset += centralDirData.length;
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result.set(endRecord, resultOffset);
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return result;
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}
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// Simple CRC32 implementation
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function crc32(data: Uint8Array): number {
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const table = new Uint32Array(256);
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for (let i = 0; i < 256; i++) {
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let c = i;
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for (let j = 0; j < 8; j++) {
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c = (c & 1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1);
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}
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table[i] = c;
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}
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let crc = 0xFFFFFFFF;
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for (let i = 0; i < data.length; i++) {
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crc = table[(crc ^ data[i]) & 0xFF] ^ (crc >>> 8);
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}
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return (crc ^ 0xFFFFFFFF) >>> 0;
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}
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