187 lines
5.2 KiB
TypeScript
187 lines
5.2 KiB
TypeScript
// import { mkdir, readdir, readFile, stat, unlink, writeFile } from "fs/promises";
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import { path } from "../deps.ts";
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import { readAll } from "../deps.ts";
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import { FileMeta } from "../types.ts";
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import { SpacePrimitives } from "./space_primitives.ts";
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import { mime } from "https://deno.land/x/mimetypes@v1.0.0/mod.ts";
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import { walk } from "https://deno.land/std@0.165.0/fs/walk.ts";
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function lookupContentType(path: string): string {
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return mime.getType(path) || "application/octet-stream";
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}
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function normalizeForwardSlashPath(path: string) {
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return path.replaceAll("\\", "/");
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}
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const excludedFiles = ["data.db", "data.db-journal", "sync.json"];
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export type DiskSpaceOptions = {
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maxFileSizeMB?: number;
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};
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export class DiskSpacePrimitives implements SpacePrimitives {
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rootPath: string;
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constructor(rootPath: string, private options: DiskSpaceOptions = {}) {
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this.rootPath = Deno.realPathSync(rootPath);
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}
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safePath(p: string): string {
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const realPath = path.resolve(p);
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if (!realPath.startsWith(this.rootPath)) {
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throw Error(`Path ${p} is not in the space`);
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}
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return realPath;
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}
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filenameToPath(pageName: string) {
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return this.safePath(path.join(this.rootPath, pageName));
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}
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pathToFilename(fullPath: string): string {
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return fullPath.substring(this.rootPath.length + 1);
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}
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async readFile(
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name: string,
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): Promise<{ data: Uint8Array; meta: FileMeta }> {
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const localPath = this.filenameToPath(name);
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try {
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const s = await Deno.stat(localPath);
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const contentType = lookupContentType(name);
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const f = await Deno.open(localPath, { read: true });
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const data = await readAll(f);
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Deno.close(f.rid);
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return {
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data,
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meta: {
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name: name,
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lastModified: s.mtime!.getTime(),
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perm: "rw",
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size: s.size,
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contentType: contentType,
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},
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};
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} catch {
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// console.error("Error while reading file", name, e);
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throw Error(`Could not read file ${name}`);
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}
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}
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async writeFile(
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name: string,
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data: Uint8Array,
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_selfUpdate?: boolean,
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lastModified?: number,
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): Promise<FileMeta> {
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const localPath = this.filenameToPath(name);
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try {
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// Ensure parent folder exists
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await Deno.mkdir(path.dirname(localPath), { recursive: true });
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const file = await Deno.open(localPath, {
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write: true,
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create: true,
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truncate: true,
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});
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// Actually write the file
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await Deno.write(file.rid, data);
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if (lastModified) {
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console.log("Seting mtime to", new Date(lastModified));
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await Deno.futime(file.rid, new Date(), new Date(lastModified));
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}
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file.close();
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// Fetch new metadata
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const s = await Deno.stat(localPath);
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return {
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name: name,
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size: s.size,
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contentType: lookupContentType(name),
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lastModified: s.mtime!.getTime(),
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perm: "rw",
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};
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} catch (e) {
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console.error("Error while writing file", name, e);
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throw Error(`Could not write ${name}`);
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}
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}
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async getFileMeta(name: string): Promise<FileMeta> {
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const localPath = this.filenameToPath(name);
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try {
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const s = await Deno.stat(localPath);
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return {
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name: name,
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size: s.size,
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contentType: lookupContentType(name),
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lastModified: s.mtime!.getTime(),
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perm: "rw",
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};
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} catch {
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// console.error("Error while getting page meta", pageName, e);
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throw Error(`Could not get meta for ${name}`);
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}
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}
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async deleteFile(name: string): Promise<void> {
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const localPath = this.filenameToPath(name);
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await Deno.remove(localPath);
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}
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async fetchFileList(): Promise<FileMeta[]> {
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const allFiles: FileMeta[] = [];
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for await (
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const file of walk(this.rootPath, {
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includeDirs: false,
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// Exclude hidden directories
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skip: [
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// Dynamically builds a regexp that matches hidden directories INSIDE the rootPath
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// (but if the rootPath is hidden, it stil lists files inside of it, fixing #130)
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new RegExp(`^${escapeRegExp(this.rootPath)}.*\\/\\..+$`),
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],
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})
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) {
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const fullPath = file.path;
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try {
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const s = await Deno.stat(fullPath);
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// Don't list file exceeding the maximum file size
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if (
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this.options.maxFileSizeMB &&
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s.size / (1024 * 1024) > this.options.maxFileSizeMB
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) {
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continue;
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}
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const name = fullPath.substring(this.rootPath.length + 1);
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if (excludedFiles.includes(name)) {
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continue;
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}
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allFiles.push({
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name: normalizeForwardSlashPath(name),
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lastModified: s.mtime!.getTime(),
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contentType: mime.getType(fullPath) || "application/octet-stream",
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size: s.size,
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perm: "rw",
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});
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} catch (e: any) {
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if (e instanceof Deno.errors.NotFound) {
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// Ignore, temporariy file already deleted by the time we got here
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} else {
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console.error("Failed to stat", fullPath, e);
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}
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}
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}
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return allFiles;
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}
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}
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function escapeRegExp(string: string) {
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return string.replace(/[.*+?^${}()|[\]\\]/g, "\\$&"); // $& means the whole matched string
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}
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