63 lines
2.9 KiB
JavaScript
63 lines
2.9 KiB
JavaScript
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"use strict";
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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};
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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const debug_1 = __importDefault(require("debug"));
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const fs_1 = require("fs");
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const fs_extra_1 = require("fs-extra");
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const file_uri_to_path_1 = __importDefault(require("file-uri-to-path"));
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const notfound_1 = __importDefault(require("./notfound"));
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const notmodified_1 = __importDefault(require("./notmodified"));
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const debug = debug_1.default('get-uri:file');
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/**
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* Returns a `fs.ReadStream` instance from a "file:" URI.
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*/
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function get({ href: uri }, opts) {
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return __awaiter(this, void 0, void 0, function* () {
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const { cache, flags = 'r', mode = 438 // =0666
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} = opts;
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try {
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// Convert URI → Path
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const filepath = file_uri_to_path_1.default(uri);
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debug('Normalized pathname: %o', filepath);
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// `open()` first to get a file descriptor and ensure that the file
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// exists.
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const fd = yield fs_extra_1.open(filepath, flags, mode);
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// Now `fstat()` to check the `mtime` and store the stat object for
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// the cache.
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const stat = yield fs_extra_1.fstat(fd);
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// if a `cache` was provided, check if the file has not been modified
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if (cache && cache.stat && stat && isNotModified(cache.stat, stat)) {
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throw new notmodified_1.default();
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}
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// `fs.ReadStream` takes care of calling `fs.close()` on the
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// fd after it's done reading
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// @ts-ignore - `@types/node` doesn't allow `null` as file path :/
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const rs = fs_1.createReadStream(null, Object.assign(Object.assign({ autoClose: true }, opts), { fd }));
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rs.stat = stat;
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return rs;
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}
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catch (err) {
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if (err.code === 'ENOENT') {
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throw new notfound_1.default();
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}
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throw err;
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}
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});
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}
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exports.default = get;
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// returns `true` if the `mtime` of the 2 stat objects are equal
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function isNotModified(prev, curr) {
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return +prev.mtime === +curr.mtime;
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}
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//# sourceMappingURL=file.js.map
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