66 lines
1.7 KiB
JavaScript
66 lines
1.7 KiB
JavaScript
const fs = require('fs');
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const is = require('is-type-of');
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const { isObject } = require('../utils/isObject');
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const proto = exports;
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/**
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* get
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* @param {String} name - object name
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* @param {String | Stream | Object} file - file path or file stream or options
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* @param {Object} options
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* @param {{res}}
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*/
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proto.get = async function get(name, file, options = {}) {
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let writeStream = null;
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let needDestroy = false;
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if (is.writableStream(file)) {
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writeStream = file;
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} else if (is.string(file)) {
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writeStream = fs.createWriteStream(file);
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needDestroy = true;
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} else if (isObject(file)) {
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// get(name, options)
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options = file;
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}
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options = options || {};
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const isBrowserEnv = process && process.browser;
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const responseCacheControl = options.responseCacheControl === null ? '' : 'no-cache';
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const defaultSubresOptions =
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isBrowserEnv && responseCacheControl ? { 'response-cache-control': responseCacheControl } : {};
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options.subres = Object.assign(defaultSubresOptions, options.subres);
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if (options.versionId) {
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options.subres.versionId = options.versionId;
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}
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if (options.process) {
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options.subres['x-oss-process'] = options.process;
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}
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let result;
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try {
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const params = this._objectRequestParams('GET', name, options);
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params.writeStream = writeStream;
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params.successStatuses = [200, 206, 304];
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result = await this.request(params);
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if (needDestroy) {
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writeStream.destroy();
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}
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} catch (err) {
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if (needDestroy) {
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writeStream.destroy();
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// should delete the exists file before throw error
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await this._deleteFileSafe(file);
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}
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throw err;
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}
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return {
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res: result.res,
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content: result.data
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};
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};
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