libzotero/lib/File.js

javascript libZotero

'use strict';

var log = require('./Log.js').Logger('libZotero:File');

var SparkMD5 = require('spark-md5');

module.exports = {};

module.exports.getFileInfo = function (file) {
	//fileInfo: md5, filename, filesize, mtime, zip, contentType, charset
	if (typeof FileReader === 'undefined') {
		return Promise.reject(new Error('FileReader not supported'));
	}

	return new Promise(function (resolve, reject) {
		var fileInfo = {};
		var reader = new FileReader();
		reader.onload = function (e) {
			log.debug('Zotero.file.getFileInfo onloadFunc', 3);
			var result = e.target.result;
			log.debug(result, 3);
			fileInfo.md5 = SparkMD5.ArrayBuffer.hash(result);
			fileInfo.filename = file.name;
			fileInfo.filesize = file.size;
			fileInfo.mtime = Date.now();
			fileInfo.contentType = file.type;
			//fileInfo.reader = reader;
			fileInfo.filedata = result;
			resolve(fileInfo);
		};

		reader.readAsArrayBuffer(file);
	});
};

module.exports.uploadFile = function (uploadInfo, fileInfo) {
	log.debug('Zotero.file.uploadFile', 3);
	log.debug(uploadInfo, 4);

	var formData = new FormData();
	Object.keys(uploadInfo.params).forEach(function (key) {
		var val = uploadInfo.params[key];
		formData.append(key, val);
	});

	var blobData = new Blob([fileInfo.filedata], { type: fileInfo.contentType });
	formData.append('file', blobData);

	var xhr = new XMLHttpRequest();

	xhr.open('POST', uploadInfo.url, true);

	return new Promise(function (resolve, reject) {
		xhr.onload = function (evt) {
			log.debug('uploadFile onload event', 3);
			if (this.status == 201) {
				log.debug('successful upload - 201', 3);
				resolve();
			} else {
				log.error('uploadFile failed - ' + xhr.status);
				reject({
					'message': 'Failure uploading file.',
					'code': xhr.status,
					'serverMessage': xhr.responseText
				});
			}
		};

		xhr.onprogress = function (evt) {
			log.debug('progress event');
			log.debug(evt);
		};
		xhr.send(formData);
	});

	//If CORS is not enabled on s3 this XHR will not have the normal status
	//information, but will still fire readyStateChanges so you can tell
	//when the upload has finished (even if you can't tell if it was successful
	//from JS)
};