1935 lines
51 KiB
JavaScript
Executable File
1935 lines
51 KiB
JavaScript
Executable File
/* @license
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Papa Parse
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v5.3.0
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https://github.com/mholt/PapaParse
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License: MIT
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*/
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(function(root, factory)
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{
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/* globals define */
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if (typeof define === 'function' && define.amd)
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{
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// AMD. Register as an anonymous module.
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define([], factory);
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}
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else if (typeof module === 'object' && typeof exports !== 'undefined')
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{
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// Node. Does not work with strict CommonJS, but
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// only CommonJS-like environments that support module.exports,
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// like Node.
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module.exports = factory();
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}
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else
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{
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// Browser globals (root is window)
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root.Papa = factory();
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}
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// in strict mode we cannot access arguments.callee, so we need a named reference to
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// stringify the factory method for the blob worker
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// eslint-disable-next-line func-name
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}(this, function moduleFactory()
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{
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'use strict';
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var global = (function() {
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// alternative method, similar to `Function('return this')()`
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// but without using `eval` (which is disabled when
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// using Content Security Policy).
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if (typeof self !== 'undefined') { return self; }
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if (typeof window !== 'undefined') { return window; }
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if (typeof global !== 'undefined') { return global; }
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// When running tests none of the above have been defined
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return {};
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})();
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function getWorkerBlob() {
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var URL = global.URL || global.webkitURL || null;
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var code = moduleFactory.toString();
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return Papa.BLOB_URL || (Papa.BLOB_URL = URL.createObjectURL(new Blob(['(', code, ')();'], {type: 'text/javascript'})));
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}
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var IS_WORKER = !global.document && !!global.postMessage,
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IS_PAPA_WORKER = IS_WORKER && /blob:/i.test((global.location || {}).protocol);
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var workers = {}, workerIdCounter = 0;
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var Papa = {};
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Papa.parse = CsvToJson;
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Papa.unparse = JsonToCsv;
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Papa.RECORD_SEP = String.fromCharCode(30);
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Papa.UNIT_SEP = String.fromCharCode(31);
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Papa.BYTE_ORDER_MARK = '\ufeff';
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Papa.BAD_DELIMITERS = ['\r', '\n', '"', Papa.BYTE_ORDER_MARK];
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Papa.WORKERS_SUPPORTED = !IS_WORKER && !!global.Worker;
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Papa.NODE_STREAM_INPUT = 1;
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// Configurable chunk sizes for local and remote files, respectively
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Papa.LocalChunkSize = 1024 * 1024 * 10; // 10 MB
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Papa.RemoteChunkSize = 1024 * 1024 * 5; // 5 MB
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Papa.DefaultDelimiter = ','; // Used if not specified and detection fails
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// Exposed for testing and development only
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Papa.Parser = Parser;
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Papa.ParserHandle = ParserHandle;
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Papa.NetworkStreamer = NetworkStreamer;
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Papa.FileStreamer = FileStreamer;
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Papa.StringStreamer = StringStreamer;
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Papa.ReadableStreamStreamer = ReadableStreamStreamer;
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if (typeof PAPA_BROWSER_CONTEXT === 'undefined') {
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Papa.DuplexStreamStreamer = DuplexStreamStreamer;
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}
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if (global.jQuery)
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{
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var $ = global.jQuery;
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$.fn.parse = function(options)
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{
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var config = options.config || {};
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var queue = [];
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this.each(function(idx)
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{
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var supported = $(this).prop('tagName').toUpperCase() === 'INPUT'
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&& $(this).attr('type').toLowerCase() === 'file'
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&& global.FileReader;
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if (!supported || !this.files || this.files.length === 0)
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return true; // continue to next input element
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for (var i = 0; i < this.files.length; i++)
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{
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queue.push({
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file: this.files[i],
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inputElem: this,
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instanceConfig: $.extend({}, config)
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});
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}
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});
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parseNextFile(); // begin parsing
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return this; // maintains chainability
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function parseNextFile()
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{
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if (queue.length === 0)
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{
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if (isFunction(options.complete))
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options.complete();
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return;
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}
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var f = queue[0];
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if (isFunction(options.before))
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{
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var returned = options.before(f.file, f.inputElem);
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if (typeof returned === 'object')
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{
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if (returned.action === 'abort')
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{
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error('AbortError', f.file, f.inputElem, returned.reason);
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return; // Aborts all queued files immediately
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}
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else if (returned.action === 'skip')
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{
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fileComplete(); // parse the next file in the queue, if any
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return;
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}
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else if (typeof returned.config === 'object')
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f.instanceConfig = $.extend(f.instanceConfig, returned.config);
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}
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else if (returned === 'skip')
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{
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fileComplete(); // parse the next file in the queue, if any
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return;
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}
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}
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// Wrap up the user's complete callback, if any, so that ours also gets executed
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var userCompleteFunc = f.instanceConfig.complete;
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f.instanceConfig.complete = function(results)
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{
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if (isFunction(userCompleteFunc))
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userCompleteFunc(results, f.file, f.inputElem);
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fileComplete();
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};
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Papa.parse(f.file, f.instanceConfig);
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}
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function error(name, file, elem, reason)
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{
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if (isFunction(options.error))
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options.error({name: name}, file, elem, reason);
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}
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function fileComplete()
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{
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queue.splice(0, 1);
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parseNextFile();
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}
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};
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}
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if (IS_PAPA_WORKER)
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{
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global.onmessage = workerThreadReceivedMessage;
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}
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function CsvToJson(_input, _config)
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{
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_config = _config || {};
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var dynamicTyping = _config.dynamicTyping || false;
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if (isFunction(dynamicTyping)) {
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_config.dynamicTypingFunction = dynamicTyping;
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// Will be filled on first row call
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dynamicTyping = {};
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}
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_config.dynamicTyping = dynamicTyping;
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_config.transform = isFunction(_config.transform) ? _config.transform : false;
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if (_config.worker && Papa.WORKERS_SUPPORTED)
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{
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var w = newWorker();
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w.userStep = _config.step;
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w.userChunk = _config.chunk;
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w.userComplete = _config.complete;
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w.userError = _config.error;
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_config.step = isFunction(_config.step);
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_config.chunk = isFunction(_config.chunk);
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_config.complete = isFunction(_config.complete);
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_config.error = isFunction(_config.error);
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delete _config.worker; // prevent infinite loop
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w.postMessage({
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input: _input,
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config: _config,
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workerId: w.id
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});
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return;
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}
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var streamer = null;
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if (_input === Papa.NODE_STREAM_INPUT && typeof PAPA_BROWSER_CONTEXT === 'undefined')
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{
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// create a node Duplex stream for use
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// with .pipe
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streamer = new DuplexStreamStreamer(_config);
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return streamer.getStream();
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}
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else if (typeof _input === 'string')
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{
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if (_config.download)
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streamer = new NetworkStreamer(_config);
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else
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streamer = new StringStreamer(_config);
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}
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else if (_input.readable === true && isFunction(_input.read) && isFunction(_input.on))
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{
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streamer = new ReadableStreamStreamer(_config);
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}
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else if ((global.File && _input instanceof File) || _input instanceof Object) // ...Safari. (see issue #106)
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streamer = new FileStreamer(_config);
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return streamer.stream(_input);
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}
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function JsonToCsv(_input, _config)
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{
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// Default configuration
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/** whether to surround every datum with quotes */
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var _quotes = false;
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/** whether to write headers */
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var _writeHeader = true;
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/** delimiting character(s) */
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var _delimiter = ',';
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/** newline character(s) */
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var _newline = '\r\n';
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/** quote character */
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var _quoteChar = '"';
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/** escaped quote character, either "" or <config.escapeChar>" */
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var _escapedQuote = _quoteChar + _quoteChar;
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/** whether to skip empty lines */
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var _skipEmptyLines = false;
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/** the columns (keys) we expect when we unparse objects */
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var _columns = null;
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/** whether to prevent outputting cells that can be parsed as formulae by spreadsheet software (Excel and LibreOffice) */
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var _escapeFormulae = false;
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unpackConfig();
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var quoteCharRegex = new RegExp(escapeRegExp(_quoteChar), 'g');
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if (typeof _input === 'string')
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_input = JSON.parse(_input);
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if (Array.isArray(_input))
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{
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if (!_input.length || Array.isArray(_input[0]))
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return serialize(null, _input, _skipEmptyLines);
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else if (typeof _input[0] === 'object')
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return serialize(_columns || objectKeys(_input[0]), _input, _skipEmptyLines);
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}
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else if (typeof _input === 'object')
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{
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if (typeof _input.data === 'string')
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_input.data = JSON.parse(_input.data);
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if (Array.isArray(_input.data))
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{
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if (!_input.fields)
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_input.fields = _input.meta && _input.meta.fields;
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if (!_input.fields)
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_input.fields = Array.isArray(_input.data[0])
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? _input.fields
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: objectKeys(_input.data[0]);
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if (!(Array.isArray(_input.data[0])) && typeof _input.data[0] !== 'object')
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_input.data = [_input.data]; // handles input like [1,2,3] or ['asdf']
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}
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return serialize(_input.fields || [], _input.data || [], _skipEmptyLines);
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}
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// Default (any valid paths should return before this)
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throw new Error('Unable to serialize unrecognized input');
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function unpackConfig()
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{
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if (typeof _config !== 'object')
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return;
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if (typeof _config.delimiter === 'string'
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&& !Papa.BAD_DELIMITERS.filter(function(value) { return _config.delimiter.indexOf(value) !== -1; }).length)
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{
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_delimiter = _config.delimiter;
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}
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if (typeof _config.quotes === 'boolean'
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|| typeof _config.quotes === 'function'
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|| Array.isArray(_config.quotes))
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_quotes = _config.quotes;
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if (typeof _config.skipEmptyLines === 'boolean'
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|| typeof _config.skipEmptyLines === 'string')
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_skipEmptyLines = _config.skipEmptyLines;
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if (typeof _config.newline === 'string')
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_newline = _config.newline;
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if (typeof _config.quoteChar === 'string')
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_quoteChar = _config.quoteChar;
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if (typeof _config.header === 'boolean')
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_writeHeader = _config.header;
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if (Array.isArray(_config.columns)) {
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if (_config.columns.length === 0) throw new Error('Option columns is empty');
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_columns = _config.columns;
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}
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if (_config.escapeChar !== undefined) {
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_escapedQuote = _config.escapeChar + _quoteChar;
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}
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if (typeof _config.escapeFormulae === 'boolean')
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_escapeFormulae = _config.escapeFormulae;
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}
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/** Turns an object's keys into an array */
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function objectKeys(obj)
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{
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if (typeof obj !== 'object')
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return [];
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var keys = [];
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for (var key in obj)
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keys.push(key);
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return keys;
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}
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/** The double for loop that iterates the data and writes out a CSV string including header row */
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function serialize(fields, data, skipEmptyLines)
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{
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var csv = '';
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if (typeof fields === 'string')
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fields = JSON.parse(fields);
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if (typeof data === 'string')
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data = JSON.parse(data);
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var hasHeader = Array.isArray(fields) && fields.length > 0;
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var dataKeyedByField = !(Array.isArray(data[0]));
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// If there a header row, write it first
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if (hasHeader && _writeHeader)
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{
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for (var i = 0; i < fields.length; i++)
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{
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if (i > 0)
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csv += _delimiter;
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csv += safe(fields[i], i);
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}
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if (data.length > 0)
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csv += _newline;
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}
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// Then write out the data
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for (var row = 0; row < data.length; row++)
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{
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var maxCol = hasHeader ? fields.length : data[row].length;
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var emptyLine = false;
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var nullLine = hasHeader ? Object.keys(data[row]).length === 0 : data[row].length === 0;
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if (skipEmptyLines && !hasHeader)
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{
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emptyLine = skipEmptyLines === 'greedy' ? data[row].join('').trim() === '' : data[row].length === 1 && data[row][0].length === 0;
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}
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if (skipEmptyLines === 'greedy' && hasHeader) {
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var line = [];
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for (var c = 0; c < maxCol; c++) {
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var cx = dataKeyedByField ? fields[c] : c;
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line.push(data[row][cx]);
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}
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emptyLine = line.join('').trim() === '';
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}
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if (!emptyLine)
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{
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for (var col = 0; col < maxCol; col++)
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{
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if (col > 0 && !nullLine)
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csv += _delimiter;
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var colIdx = hasHeader && dataKeyedByField ? fields[col] : col;
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csv += safe(data[row][colIdx], col);
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}
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if (row < data.length - 1 && (!skipEmptyLines || (maxCol > 0 && !nullLine)))
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{
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csv += _newline;
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}
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}
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}
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return csv;
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}
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/** Encloses a value around quotes if needed (makes a value safe for CSV insertion) */
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function safe(str, col)
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{
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if (typeof str === 'undefined' || str === null)
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return '';
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if (str.constructor === Date)
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return JSON.stringify(str).slice(1, 25);
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if (_escapeFormulae === true && typeof str === "string" && (str.match(/^[=+\-@].*$/) !== null)) {
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str = "'" + str;
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}
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var escapedQuoteStr = str.toString().replace(quoteCharRegex, _escapedQuote);
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var needsQuotes = (typeof _quotes === 'boolean' && _quotes)
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|| (typeof _quotes === 'function' && _quotes(str, col))
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|| (Array.isArray(_quotes) && _quotes[col])
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|| hasAny(escapedQuoteStr, Papa.BAD_DELIMITERS)
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|| escapedQuoteStr.indexOf(_delimiter) > -1
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|| escapedQuoteStr.charAt(0) === ' '
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|| escapedQuoteStr.charAt(escapedQuoteStr.length - 1) === ' ';
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return needsQuotes ? _quoteChar + escapedQuoteStr + _quoteChar : escapedQuoteStr;
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}
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function hasAny(str, substrings)
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{
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for (var i = 0; i < substrings.length; i++)
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if (str.indexOf(substrings[i]) > -1)
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return true;
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return false;
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}
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}
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/** ChunkStreamer is the base prototype for various streamer implementations. */
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function ChunkStreamer(config)
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{
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this._handle = null;
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this._finished = false;
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this._completed = false;
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this._halted = false;
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this._input = null;
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this._baseIndex = 0;
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this._partialLine = '';
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this._rowCount = 0;
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this._start = 0;
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this._nextChunk = null;
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this.isFirstChunk = true;
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this._completeResults = {
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data: [],
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errors: [],
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meta: {}
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};
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replaceConfig.call(this, config);
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this.parseChunk = function(chunk, isFakeChunk)
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{
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// First chunk pre-processing
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if (this.isFirstChunk && isFunction(this._config.beforeFirstChunk))
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{
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var modifiedChunk = this._config.beforeFirstChunk(chunk);
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if (modifiedChunk !== undefined)
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chunk = modifiedChunk;
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}
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this.isFirstChunk = false;
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this._halted = false;
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// Rejoin the line we likely just split in two by chunking the file
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var aggregate = this._partialLine + chunk;
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this._partialLine = '';
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var results = this._handle.parse(aggregate, this._baseIndex, !this._finished);
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if (this._handle.paused() || this._handle.aborted()) {
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this._halted = true;
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return;
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}
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var lastIndex = results.meta.cursor;
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if (!this._finished)
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{
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this._partialLine = aggregate.substring(lastIndex - this._baseIndex);
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this._baseIndex = lastIndex;
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}
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if (results && results.data)
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this._rowCount += results.data.length;
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var finishedIncludingPreview = this._finished || (this._config.preview && this._rowCount >= this._config.preview);
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if (IS_PAPA_WORKER)
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{
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global.postMessage({
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results: results,
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workerId: Papa.WORKER_ID,
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finished: finishedIncludingPreview
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});
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}
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else if (isFunction(this._config.chunk) && !isFakeChunk)
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{
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this._config.chunk(results, this._handle);
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if (this._handle.paused() || this._handle.aborted()) {
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this._halted = true;
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return;
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}
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results = undefined;
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this._completeResults = undefined;
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}
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if (!this._config.step && !this._config.chunk) {
|
|
this._completeResults.data = this._completeResults.data.concat(results.data);
|
|
this._completeResults.errors = this._completeResults.errors.concat(results.errors);
|
|
this._completeResults.meta = results.meta;
|
|
}
|
|
|
|
if (!this._completed && finishedIncludingPreview && isFunction(this._config.complete) && (!results || !results.meta.aborted)) {
|
|
this._config.complete(this._completeResults, this._input);
|
|
this._completed = true;
|
|
}
|
|
|
|
if (!finishedIncludingPreview && (!results || !results.meta.paused))
|
|
this._nextChunk();
|
|
|
|
return results;
|
|
};
|
|
|
|
this._sendError = function(error)
|
|
{
|
|
if (isFunction(this._config.error))
|
|
this._config.error(error);
|
|
else if (IS_PAPA_WORKER && this._config.error)
|
|
{
|
|
global.postMessage({
|
|
workerId: Papa.WORKER_ID,
|
|
error: error,
|
|
finished: false
|
|
});
|
|
}
|
|
};
|
|
|
|
function replaceConfig(config)
|
|
{
|
|
// Deep-copy the config so we can edit it
|
|
var configCopy = copy(config);
|
|
configCopy.chunkSize = parseInt(configCopy.chunkSize); // parseInt VERY important so we don't concatenate strings!
|
|
if (!config.step && !config.chunk)
|
|
configCopy.chunkSize = null; // disable Range header if not streaming; bad values break IIS - see issue #196
|
|
this._handle = new ParserHandle(configCopy);
|
|
this._handle.streamer = this;
|
|
this._config = configCopy; // persist the copy to the caller
|
|
}
|
|
}
|
|
|
|
|
|
function NetworkStreamer(config)
|
|
{
|
|
config = config || {};
|
|
if (!config.chunkSize)
|
|
config.chunkSize = Papa.RemoteChunkSize;
|
|
ChunkStreamer.call(this, config);
|
|
|
|
var xhr;
|
|
|
|
if (IS_WORKER)
|
|
{
|
|
this._nextChunk = function()
|
|
{
|
|
this._readChunk();
|
|
this._chunkLoaded();
|
|
};
|
|
}
|
|
else
|
|
{
|
|
this._nextChunk = function()
|
|
{
|
|
this._readChunk();
|
|
};
|
|
}
|
|
|
|
this.stream = function(url)
|
|
{
|
|
this._input = url;
|
|
this._nextChunk(); // Starts streaming
|
|
};
|
|
|
|
this._readChunk = function()
|
|
{
|
|
if (this._finished)
|
|
{
|
|
this._chunkLoaded();
|
|
return;
|
|
}
|
|
|
|
xhr = new XMLHttpRequest();
|
|
|
|
if (this._config.withCredentials)
|
|
{
|
|
xhr.withCredentials = this._config.withCredentials;
|
|
}
|
|
|
|
if (!IS_WORKER)
|
|
{
|
|
xhr.onload = bindFunction(this._chunkLoaded, this);
|
|
xhr.onerror = bindFunction(this._chunkError, this);
|
|
}
|
|
|
|
xhr.open(this._config.downloadRequestBody ? 'POST' : 'GET', this._input, !IS_WORKER);
|
|
// Headers can only be set when once the request state is OPENED
|
|
if (this._config.downloadRequestHeaders)
|
|
{
|
|
var headers = this._config.downloadRequestHeaders;
|
|
|
|
for (var headerName in headers)
|
|
{
|
|
xhr.setRequestHeader(headerName, headers[headerName]);
|
|
}
|
|
}
|
|
|
|
if (this._config.chunkSize)
|
|
{
|
|
var end = this._start + this._config.chunkSize - 1; // minus one because byte range is inclusive
|
|
xhr.setRequestHeader('Range', 'bytes=' + this._start + '-' + end);
|
|
}
|
|
|
|
try {
|
|
xhr.send(this._config.downloadRequestBody);
|
|
}
|
|
catch (err) {
|
|
this._chunkError(err.message);
|
|
}
|
|
|
|
if (IS_WORKER && xhr.status === 0)
|
|
this._chunkError();
|
|
};
|
|
|
|
this._chunkLoaded = function()
|
|
{
|
|
if (xhr.readyState !== 4)
|
|
return;
|
|
|
|
if (xhr.status < 200 || xhr.status >= 400)
|
|
{
|
|
this._chunkError();
|
|
return;
|
|
}
|
|
|
|
// Use chunckSize as it may be a diference on reponse lentgh due to characters with more than 1 byte
|
|
this._start += this._config.chunkSize ? this._config.chunkSize : xhr.responseText.length;
|
|
this._finished = !this._config.chunkSize || this._start >= getFileSize(xhr);
|
|
this.parseChunk(xhr.responseText);
|
|
};
|
|
|
|
this._chunkError = function(errorMessage)
|
|
{
|
|
var errorText = xhr.statusText || errorMessage;
|
|
this._sendError(new Error(errorText));
|
|
};
|
|
|
|
function getFileSize(xhr)
|
|
{
|
|
var contentRange = xhr.getResponseHeader('Content-Range');
|
|
if (contentRange === null) { // no content range, then finish!
|
|
return -1;
|
|
}
|
|
return parseInt(contentRange.substring(contentRange.lastIndexOf('/') + 1));
|
|
}
|
|
}
|
|
NetworkStreamer.prototype = Object.create(ChunkStreamer.prototype);
|
|
NetworkStreamer.prototype.constructor = NetworkStreamer;
|
|
|
|
|
|
function FileStreamer(config)
|
|
{
|
|
config = config || {};
|
|
if (!config.chunkSize)
|
|
config.chunkSize = Papa.LocalChunkSize;
|
|
ChunkStreamer.call(this, config);
|
|
|
|
var reader, slice;
|
|
|
|
// FileReader is better than FileReaderSync (even in worker) - see http://stackoverflow.com/q/24708649/1048862
|
|
// But Firefox is a pill, too - see issue #76: https://github.com/mholt/PapaParse/issues/76
|
|
var usingAsyncReader = typeof FileReader !== 'undefined'; // Safari doesn't consider it a function - see issue #105
|
|
|
|
this.stream = function(file)
|
|
{
|
|
this._input = file;
|
|
slice = file.slice || file.webkitSlice || file.mozSlice;
|
|
|
|
if (usingAsyncReader)
|
|
{
|
|
reader = new FileReader(); // Preferred method of reading files, even in workers
|
|
reader.onload = bindFunction(this._chunkLoaded, this);
|
|
reader.onerror = bindFunction(this._chunkError, this);
|
|
}
|
|
else
|
|
reader = new FileReaderSync(); // Hack for running in a web worker in Firefox
|
|
|
|
this._nextChunk(); // Starts streaming
|
|
};
|
|
|
|
this._nextChunk = function()
|
|
{
|
|
if (!this._finished && (!this._config.preview || this._rowCount < this._config.preview))
|
|
this._readChunk();
|
|
};
|
|
|
|
this._readChunk = function()
|
|
{
|
|
var input = this._input;
|
|
if (this._config.chunkSize)
|
|
{
|
|
var end = Math.min(this._start + this._config.chunkSize, this._input.size);
|
|
input = slice.call(input, this._start, end);
|
|
}
|
|
var txt = reader.readAsText(input, this._config.encoding);
|
|
if (!usingAsyncReader)
|
|
this._chunkLoaded({ target: { result: txt } }); // mimic the async signature
|
|
};
|
|
|
|
this._chunkLoaded = function(event)
|
|
{
|
|
// Very important to increment start each time before handling results
|
|
this._start += this._config.chunkSize;
|
|
this._finished = !this._config.chunkSize || this._start >= this._input.size;
|
|
this.parseChunk(event.target.result);
|
|
};
|
|
|
|
this._chunkError = function()
|
|
{
|
|
this._sendError(reader.error);
|
|
};
|
|
|
|
}
|
|
FileStreamer.prototype = Object.create(ChunkStreamer.prototype);
|
|
FileStreamer.prototype.constructor = FileStreamer;
|
|
|
|
|
|
function StringStreamer(config)
|
|
{
|
|
config = config || {};
|
|
ChunkStreamer.call(this, config);
|
|
|
|
var remaining;
|
|
this.stream = function(s)
|
|
{
|
|
remaining = s;
|
|
return this._nextChunk();
|
|
};
|
|
this._nextChunk = function()
|
|
{
|
|
if (this._finished) return;
|
|
var size = this._config.chunkSize;
|
|
var chunk;
|
|
if(size) {
|
|
chunk = remaining.substring(0, size);
|
|
remaining = remaining.substring(size);
|
|
} else {
|
|
chunk = remaining;
|
|
remaining = '';
|
|
}
|
|
this._finished = !remaining;
|
|
return this.parseChunk(chunk);
|
|
};
|
|
}
|
|
StringStreamer.prototype = Object.create(StringStreamer.prototype);
|
|
StringStreamer.prototype.constructor = StringStreamer;
|
|
|
|
|
|
function ReadableStreamStreamer(config)
|
|
{
|
|
config = config || {};
|
|
|
|
ChunkStreamer.call(this, config);
|
|
|
|
var queue = [];
|
|
var parseOnData = true;
|
|
var streamHasEnded = false;
|
|
|
|
this.pause = function()
|
|
{
|
|
ChunkStreamer.prototype.pause.apply(this, arguments);
|
|
this._input.pause();
|
|
};
|
|
|
|
this.resume = function()
|
|
{
|
|
ChunkStreamer.prototype.resume.apply(this, arguments);
|
|
this._input.resume();
|
|
};
|
|
|
|
this.stream = function(stream)
|
|
{
|
|
this._input = stream;
|
|
|
|
this._input.on('data', this._streamData);
|
|
this._input.on('end', this._streamEnd);
|
|
this._input.on('error', this._streamError);
|
|
};
|
|
|
|
this._checkIsFinished = function()
|
|
{
|
|
if (streamHasEnded && queue.length === 1) {
|
|
this._finished = true;
|
|
}
|
|
};
|
|
|
|
this._nextChunk = function()
|
|
{
|
|
this._checkIsFinished();
|
|
if (queue.length)
|
|
{
|
|
this.parseChunk(queue.shift());
|
|
}
|
|
else
|
|
{
|
|
parseOnData = true;
|
|
}
|
|
};
|
|
|
|
this._streamData = bindFunction(function(chunk)
|
|
{
|
|
try
|
|
{
|
|
queue.push(typeof chunk === 'string' ? chunk : chunk.toString(this._config.encoding));
|
|
|
|
if (parseOnData)
|
|
{
|
|
parseOnData = false;
|
|
this._checkIsFinished();
|
|
this.parseChunk(queue.shift());
|
|
}
|
|
}
|
|
catch (error)
|
|
{
|
|
this._streamError(error);
|
|
}
|
|
}, this);
|
|
|
|
this._streamError = bindFunction(function(error)
|
|
{
|
|
this._streamCleanUp();
|
|
this._sendError(error);
|
|
}, this);
|
|
|
|
this._streamEnd = bindFunction(function()
|
|
{
|
|
this._streamCleanUp();
|
|
streamHasEnded = true;
|
|
this._streamData('');
|
|
}, this);
|
|
|
|
this._streamCleanUp = bindFunction(function()
|
|
{
|
|
this._input.removeListener('data', this._streamData);
|
|
this._input.removeListener('end', this._streamEnd);
|
|
this._input.removeListener('error', this._streamError);
|
|
}, this);
|
|
}
|
|
ReadableStreamStreamer.prototype = Object.create(ChunkStreamer.prototype);
|
|
ReadableStreamStreamer.prototype.constructor = ReadableStreamStreamer;
|
|
|
|
|
|
function DuplexStreamStreamer(_config) {
|
|
var Duplex = require('stream').Duplex;
|
|
var config = copy(_config);
|
|
var parseOnWrite = true;
|
|
var writeStreamHasFinished = false;
|
|
var parseCallbackQueue = [];
|
|
var stream = null;
|
|
|
|
this._onCsvData = function(results)
|
|
{
|
|
var data = results.data;
|
|
if (!stream.push(data) && !this._handle.paused()) {
|
|
// the writeable consumer buffer has filled up
|
|
// so we need to pause until more items
|
|
// can be processed
|
|
this._handle.pause();
|
|
}
|
|
};
|
|
|
|
this._onCsvComplete = function()
|
|
{
|
|
// node will finish the read stream when
|
|
// null is pushed
|
|
stream.push(null);
|
|
};
|
|
|
|
config.step = bindFunction(this._onCsvData, this);
|
|
config.complete = bindFunction(this._onCsvComplete, this);
|
|
ChunkStreamer.call(this, config);
|
|
|
|
this._nextChunk = function()
|
|
{
|
|
if (writeStreamHasFinished && parseCallbackQueue.length === 1) {
|
|
this._finished = true;
|
|
}
|
|
if (parseCallbackQueue.length) {
|
|
parseCallbackQueue.shift()();
|
|
} else {
|
|
parseOnWrite = true;
|
|
}
|
|
};
|
|
|
|
this._addToParseQueue = function(chunk, callback)
|
|
{
|
|
// add to queue so that we can indicate
|
|
// completion via callback
|
|
// node will automatically pause the incoming stream
|
|
// when too many items have been added without their
|
|
// callback being invoked
|
|
parseCallbackQueue.push(bindFunction(function() {
|
|
this.parseChunk(typeof chunk === 'string' ? chunk : chunk.toString(config.encoding));
|
|
if (isFunction(callback)) {
|
|
return callback();
|
|
}
|
|
}, this));
|
|
if (parseOnWrite) {
|
|
parseOnWrite = false;
|
|
this._nextChunk();
|
|
}
|
|
};
|
|
|
|
this._onRead = function()
|
|
{
|
|
if (this._handle.paused()) {
|
|
// the writeable consumer can handle more data
|
|
// so resume the chunk parsing
|
|
this._handle.resume();
|
|
}
|
|
};
|
|
|
|
this._onWrite = function(chunk, encoding, callback)
|
|
{
|
|
this._addToParseQueue(chunk, callback);
|
|
};
|
|
|
|
this._onWriteComplete = function()
|
|
{
|
|
writeStreamHasFinished = true;
|
|
// have to write empty string
|
|
// so parser knows its done
|
|
this._addToParseQueue('');
|
|
};
|
|
|
|
this.getStream = function()
|
|
{
|
|
return stream;
|
|
};
|
|
stream = new Duplex({
|
|
readableObjectMode: true,
|
|
decodeStrings: false,
|
|
read: bindFunction(this._onRead, this),
|
|
write: bindFunction(this._onWrite, this)
|
|
});
|
|
stream.once('finish', bindFunction(this._onWriteComplete, this));
|
|
}
|
|
if (typeof PAPA_BROWSER_CONTEXT === 'undefined') {
|
|
DuplexStreamStreamer.prototype = Object.create(ChunkStreamer.prototype);
|
|
DuplexStreamStreamer.prototype.constructor = DuplexStreamStreamer;
|
|
}
|
|
|
|
|
|
// Use one ParserHandle per entire CSV file or string
|
|
function ParserHandle(_config)
|
|
{
|
|
// One goal is to minimize the use of regular expressions...
|
|
var MAX_FLOAT = Math.pow(2, 53);
|
|
var MIN_FLOAT = -MAX_FLOAT;
|
|
var FLOAT = /^\s*-?(\d+\.?|\.\d+|\d+\.\d+)(e[-+]?\d+)?\s*$/;
|
|
var ISO_DATE = /(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d\.\d+([+-][0-2]\d:[0-5]\d|Z))|(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d([+-][0-2]\d:[0-5]\d|Z))|(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d([+-][0-2]\d:[0-5]\d|Z))/;
|
|
var self = this;
|
|
var _stepCounter = 0; // Number of times step was called (number of rows parsed)
|
|
var _rowCounter = 0; // Number of rows that have been parsed so far
|
|
var _input; // The input being parsed
|
|
var _parser; // The core parser being used
|
|
var _paused = false; // Whether we are paused or not
|
|
var _aborted = false; // Whether the parser has aborted or not
|
|
var _delimiterError; // Temporary state between delimiter detection and processing results
|
|
var _fields = []; // Fields are from the header row of the input, if there is one
|
|
var _results = { // The last results returned from the parser
|
|
data: [],
|
|
errors: [],
|
|
meta: {}
|
|
};
|
|
|
|
if (isFunction(_config.step))
|
|
{
|
|
var userStep = _config.step;
|
|
_config.step = function(results)
|
|
{
|
|
_results = results;
|
|
|
|
if (needsHeaderRow())
|
|
processResults();
|
|
else // only call user's step function after header row
|
|
{
|
|
processResults();
|
|
|
|
// It's possbile that this line was empty and there's no row here after all
|
|
if (_results.data.length === 0)
|
|
return;
|
|
|
|
_stepCounter += results.data.length;
|
|
if (_config.preview && _stepCounter > _config.preview)
|
|
_parser.abort();
|
|
else {
|
|
_results.data = _results.data[0];
|
|
userStep(_results, self);
|
|
}
|
|
}
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Parses input. Most users won't need, and shouldn't mess with, the baseIndex
|
|
* and ignoreLastRow parameters. They are used by streamers (wrapper functions)
|
|
* when an input comes in multiple chunks, like from a file.
|
|
*/
|
|
this.parse = function(input, baseIndex, ignoreLastRow)
|
|
{
|
|
var quoteChar = _config.quoteChar || '"';
|
|
if (!_config.newline)
|
|
_config.newline = guessLineEndings(input, quoteChar);
|
|
|
|
_delimiterError = false;
|
|
if (!_config.delimiter)
|
|
{
|
|
var delimGuess = guessDelimiter(input, _config.newline, _config.skipEmptyLines, _config.comments, _config.delimitersToGuess);
|
|
if (delimGuess.successful)
|
|
_config.delimiter = delimGuess.bestDelimiter;
|
|
else
|
|
{
|
|
_delimiterError = true; // add error after parsing (otherwise it would be overwritten)
|
|
_config.delimiter = Papa.DefaultDelimiter;
|
|
}
|
|
_results.meta.delimiter = _config.delimiter;
|
|
}
|
|
else if(isFunction(_config.delimiter))
|
|
{
|
|
_config.delimiter = _config.delimiter(input);
|
|
_results.meta.delimiter = _config.delimiter;
|
|
}
|
|
|
|
var parserConfig = copy(_config);
|
|
if (_config.preview && _config.header)
|
|
parserConfig.preview++; // to compensate for header row
|
|
|
|
_input = input;
|
|
_parser = new Parser(parserConfig);
|
|
_results = _parser.parse(_input, baseIndex, ignoreLastRow);
|
|
processResults();
|
|
return _paused ? { meta: { paused: true } } : (_results || { meta: { paused: false } });
|
|
};
|
|
|
|
this.paused = function()
|
|
{
|
|
return _paused;
|
|
};
|
|
|
|
this.pause = function()
|
|
{
|
|
_paused = true;
|
|
_parser.abort();
|
|
|
|
// If it is streaming via "chunking", the reader will start appending correctly already so no need to substring,
|
|
// otherwise we can get duplicate content within a row
|
|
_input = isFunction(_config.chunk) ? "" : _input.substring(_parser.getCharIndex());
|
|
};
|
|
|
|
this.resume = function()
|
|
{
|
|
if(self.streamer._halted) {
|
|
_paused = false;
|
|
self.streamer.parseChunk(_input, true);
|
|
} else {
|
|
// Bugfix: #636 In case the processing hasn't halted yet
|
|
// wait for it to halt in order to resume
|
|
setTimeout(self.resume, 3);
|
|
}
|
|
};
|
|
|
|
this.aborted = function()
|
|
{
|
|
return _aborted;
|
|
};
|
|
|
|
this.abort = function()
|
|
{
|
|
_aborted = true;
|
|
_parser.abort();
|
|
_results.meta.aborted = true;
|
|
if (isFunction(_config.complete))
|
|
_config.complete(_results);
|
|
_input = '';
|
|
};
|
|
|
|
function testEmptyLine(s) {
|
|
return _config.skipEmptyLines === 'greedy' ? s.join('').trim() === '' : s.length === 1 && s[0].length === 0;
|
|
}
|
|
|
|
function testFloat(s) {
|
|
if (FLOAT.test(s)) {
|
|
var floatValue = parseFloat(s);
|
|
if (floatValue > MIN_FLOAT && floatValue < MAX_FLOAT) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
function processResults()
|
|
{
|
|
if (_results && _delimiterError)
|
|
{
|
|
addError('Delimiter', 'UndetectableDelimiter', 'Unable to auto-detect delimiting character; defaulted to \'' + Papa.DefaultDelimiter + '\'');
|
|
_delimiterError = false;
|
|
}
|
|
|
|
if (_config.skipEmptyLines)
|
|
{
|
|
for (var i = 0; i < _results.data.length; i++)
|
|
if (testEmptyLine(_results.data[i]))
|
|
_results.data.splice(i--, 1);
|
|
}
|
|
|
|
if (needsHeaderRow())
|
|
fillHeaderFields();
|
|
|
|
return applyHeaderAndDynamicTypingAndTransformation();
|
|
}
|
|
|
|
function needsHeaderRow()
|
|
{
|
|
return _config.header && _fields.length === 0;
|
|
}
|
|
|
|
function fillHeaderFields()
|
|
{
|
|
if (!_results)
|
|
return;
|
|
|
|
function addHeader(header, i)
|
|
{
|
|
if (isFunction(_config.transformHeader))
|
|
header = _config.transformHeader(header, i);
|
|
|
|
_fields.push(header);
|
|
}
|
|
|
|
if (Array.isArray(_results.data[0]))
|
|
{
|
|
for (var i = 0; needsHeaderRow() && i < _results.data.length; i++)
|
|
_results.data[i].forEach(addHeader);
|
|
|
|
_results.data.splice(0, 1);
|
|
}
|
|
// if _results.data[0] is not an array, we are in a step where _results.data is the row.
|
|
else
|
|
_results.data.forEach(addHeader);
|
|
}
|
|
|
|
function shouldApplyDynamicTyping(field) {
|
|
// Cache function values to avoid calling it for each row
|
|
if (_config.dynamicTypingFunction && _config.dynamicTyping[field] === undefined) {
|
|
_config.dynamicTyping[field] = _config.dynamicTypingFunction(field);
|
|
}
|
|
return (_config.dynamicTyping[field] || _config.dynamicTyping) === true;
|
|
}
|
|
|
|
function parseDynamic(field, value)
|
|
{
|
|
if (shouldApplyDynamicTyping(field))
|
|
{
|
|
if (value === 'true' || value === 'TRUE')
|
|
return true;
|
|
else if (value === 'false' || value === 'FALSE')
|
|
return false;
|
|
else if (testFloat(value))
|
|
return parseFloat(value);
|
|
else if (ISO_DATE.test(value))
|
|
return new Date(value);
|
|
else
|
|
return (value === '' ? null : value);
|
|
}
|
|
return value;
|
|
}
|
|
|
|
function applyHeaderAndDynamicTypingAndTransformation()
|
|
{
|
|
if (!_results || (!_config.header && !_config.dynamicTyping && !_config.transform))
|
|
return _results;
|
|
|
|
function processRow(rowSource, i)
|
|
{
|
|
var row = _config.header ? {} : [];
|
|
|
|
var j;
|
|
for (j = 0; j < rowSource.length; j++)
|
|
{
|
|
var field = j;
|
|
var value = rowSource[j];
|
|
|
|
if (_config.header)
|
|
field = j >= _fields.length ? '__parsed_extra' : _fields[j];
|
|
|
|
if (_config.transform)
|
|
value = _config.transform(value,field);
|
|
|
|
value = parseDynamic(field, value);
|
|
|
|
if (field === '__parsed_extra')
|
|
{
|
|
row[field] = row[field] || [];
|
|
row[field].push(value);
|
|
}
|
|
else
|
|
row[field] = value;
|
|
}
|
|
|
|
|
|
if (_config.header)
|
|
{
|
|
if (j > _fields.length)
|
|
addError('FieldMismatch', 'TooManyFields', 'Too many fields: expected ' + _fields.length + ' fields but parsed ' + j, _rowCounter + i);
|
|
else if (j < _fields.length)
|
|
addError('FieldMismatch', 'TooFewFields', 'Too few fields: expected ' + _fields.length + ' fields but parsed ' + j, _rowCounter + i);
|
|
}
|
|
|
|
return row;
|
|
}
|
|
|
|
var incrementBy = 1;
|
|
if (!_results.data.length || Array.isArray(_results.data[0]))
|
|
{
|
|
_results.data = _results.data.map(processRow);
|
|
incrementBy = _results.data.length;
|
|
}
|
|
else
|
|
_results.data = processRow(_results.data, 0);
|
|
|
|
|
|
if (_config.header && _results.meta)
|
|
_results.meta.fields = _fields;
|
|
|
|
_rowCounter += incrementBy;
|
|
return _results;
|
|
}
|
|
|
|
function guessDelimiter(input, newline, skipEmptyLines, comments, delimitersToGuess) {
|
|
var bestDelim, bestDelta, fieldCountPrevRow, maxFieldCount;
|
|
|
|
delimitersToGuess = delimitersToGuess || [',', '\t', '|', ';', Papa.RECORD_SEP, Papa.UNIT_SEP];
|
|
|
|
for (var i = 0; i < delimitersToGuess.length; i++) {
|
|
var delim = delimitersToGuess[i];
|
|
var delta = 0, avgFieldCount = 0, emptyLinesCount = 0;
|
|
fieldCountPrevRow = undefined;
|
|
|
|
var preview = new Parser({
|
|
comments: comments,
|
|
delimiter: delim,
|
|
newline: newline,
|
|
preview: 10
|
|
}).parse(input);
|
|
|
|
for (var j = 0; j < preview.data.length; j++) {
|
|
if (skipEmptyLines && testEmptyLine(preview.data[j])) {
|
|
emptyLinesCount++;
|
|
continue;
|
|
}
|
|
var fieldCount = preview.data[j].length;
|
|
avgFieldCount += fieldCount;
|
|
|
|
if (typeof fieldCountPrevRow === 'undefined') {
|
|
fieldCountPrevRow = fieldCount;
|
|
continue;
|
|
}
|
|
else if (fieldCount > 0) {
|
|
delta += Math.abs(fieldCount - fieldCountPrevRow);
|
|
fieldCountPrevRow = fieldCount;
|
|
}
|
|
}
|
|
|
|
if (preview.data.length > 0)
|
|
avgFieldCount /= (preview.data.length - emptyLinesCount);
|
|
|
|
if ((typeof bestDelta === 'undefined' || delta <= bestDelta)
|
|
&& (typeof maxFieldCount === 'undefined' || avgFieldCount > maxFieldCount) && avgFieldCount > 1.99) {
|
|
bestDelta = delta;
|
|
bestDelim = delim;
|
|
maxFieldCount = avgFieldCount;
|
|
}
|
|
}
|
|
|
|
_config.delimiter = bestDelim;
|
|
|
|
return {
|
|
successful: !!bestDelim,
|
|
bestDelimiter: bestDelim
|
|
};
|
|
}
|
|
|
|
function guessLineEndings(input, quoteChar)
|
|
{
|
|
input = input.substring(0, 1024 * 1024); // max length 1 MB
|
|
// Replace all the text inside quotes
|
|
var re = new RegExp(escapeRegExp(quoteChar) + '([^]*?)' + escapeRegExp(quoteChar), 'gm');
|
|
input = input.replace(re, '');
|
|
|
|
var r = input.split('\r');
|
|
|
|
var n = input.split('\n');
|
|
|
|
var nAppearsFirst = (n.length > 1 && n[0].length < r[0].length);
|
|
|
|
if (r.length === 1 || nAppearsFirst)
|
|
return '\n';
|
|
|
|
var numWithN = 0;
|
|
for (var i = 0; i < r.length; i++)
|
|
{
|
|
if (r[i][0] === '\n')
|
|
numWithN++;
|
|
}
|
|
|
|
return numWithN >= r.length / 2 ? '\r\n' : '\r';
|
|
}
|
|
|
|
function addError(type, code, msg, row)
|
|
{
|
|
var error = {
|
|
type: type,
|
|
code: code,
|
|
message: msg
|
|
};
|
|
if(row !== undefined) {
|
|
error.row = row;
|
|
}
|
|
_results.errors.push(error);
|
|
}
|
|
}
|
|
|
|
/** https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions */
|
|
function escapeRegExp(string)
|
|
{
|
|
return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
|
|
}
|
|
|
|
/** The core parser implements speedy and correct CSV parsing */
|
|
function Parser(config)
|
|
{
|
|
// Unpack the config object
|
|
config = config || {};
|
|
var delim = config.delimiter;
|
|
var newline = config.newline;
|
|
var comments = config.comments;
|
|
var step = config.step;
|
|
var preview = config.preview;
|
|
var fastMode = config.fastMode;
|
|
var quoteChar;
|
|
/** Allows for no quoteChar by setting quoteChar to undefined in config */
|
|
if (config.quoteChar === undefined) {
|
|
quoteChar = '"';
|
|
} else {
|
|
quoteChar = config.quoteChar;
|
|
}
|
|
var escapeChar = quoteChar;
|
|
if (config.escapeChar !== undefined) {
|
|
escapeChar = config.escapeChar;
|
|
}
|
|
|
|
// Delimiter must be valid
|
|
if (typeof delim !== 'string'
|
|
|| Papa.BAD_DELIMITERS.indexOf(delim) > -1)
|
|
delim = ',';
|
|
|
|
// Comment character must be valid
|
|
if (comments === delim)
|
|
throw new Error('Comment character same as delimiter');
|
|
else if (comments === true)
|
|
comments = '#';
|
|
else if (typeof comments !== 'string'
|
|
|| Papa.BAD_DELIMITERS.indexOf(comments) > -1)
|
|
comments = false;
|
|
|
|
// Newline must be valid: \r, \n, or \r\n
|
|
if (newline !== '\n' && newline !== '\r' && newline !== '\r\n')
|
|
newline = '\n';
|
|
|
|
// We're gonna need these at the Parser scope
|
|
var cursor = 0;
|
|
var aborted = false;
|
|
|
|
this.parse = function(input, baseIndex, ignoreLastRow)
|
|
{
|
|
// For some reason, in Chrome, this speeds things up (!?)
|
|
if (typeof input !== 'string')
|
|
throw new Error('Input must be a string');
|
|
|
|
// We don't need to compute some of these every time parse() is called,
|
|
// but having them in a more local scope seems to perform better
|
|
var inputLen = input.length,
|
|
delimLen = delim.length,
|
|
newlineLen = newline.length,
|
|
commentsLen = comments.length;
|
|
var stepIsFunction = isFunction(step);
|
|
|
|
// Establish starting state
|
|
cursor = 0;
|
|
var data = [], errors = [], row = [], lastCursor = 0;
|
|
|
|
if (!input)
|
|
return returnable();
|
|
|
|
if (fastMode || (fastMode !== false && input.indexOf(quoteChar) === -1))
|
|
{
|
|
var rows = input.split(newline);
|
|
for (var i = 0; i < rows.length; i++)
|
|
{
|
|
row = rows[i];
|
|
cursor += row.length;
|
|
if (i !== rows.length - 1)
|
|
cursor += newline.length;
|
|
else if (ignoreLastRow)
|
|
return returnable();
|
|
if (comments && row.substring(0, commentsLen) === comments)
|
|
continue;
|
|
if (stepIsFunction)
|
|
{
|
|
data = [];
|
|
pushRow(row.split(delim));
|
|
doStep();
|
|
if (aborted)
|
|
return returnable();
|
|
}
|
|
else
|
|
pushRow(row.split(delim));
|
|
if (preview && i >= preview)
|
|
{
|
|
data = data.slice(0, preview);
|
|
return returnable(true);
|
|
}
|
|
}
|
|
return returnable();
|
|
}
|
|
|
|
var nextDelim = input.indexOf(delim, cursor);
|
|
var nextNewline = input.indexOf(newline, cursor);
|
|
var quoteCharRegex = new RegExp(escapeRegExp(escapeChar) + escapeRegExp(quoteChar), 'g');
|
|
var quoteSearch = input.indexOf(quoteChar, cursor);
|
|
|
|
// Parser loop
|
|
for (;;)
|
|
{
|
|
// Field has opening quote
|
|
if (input[cursor] === quoteChar)
|
|
{
|
|
// Start our search for the closing quote where the cursor is
|
|
quoteSearch = cursor;
|
|
|
|
// Skip the opening quote
|
|
cursor++;
|
|
|
|
for (;;)
|
|
{
|
|
// Find closing quote
|
|
quoteSearch = input.indexOf(quoteChar, quoteSearch + 1);
|
|
|
|
//No other quotes are found - no other delimiters
|
|
if (quoteSearch === -1)
|
|
{
|
|
if (!ignoreLastRow) {
|
|
// No closing quote... what a pity
|
|
errors.push({
|
|
type: 'Quotes',
|
|
code: 'MissingQuotes',
|
|
message: 'Quoted field unterminated',
|
|
row: data.length, // row has yet to be inserted
|
|
index: cursor
|
|
});
|
|
}
|
|
return finish();
|
|
}
|
|
|
|
// Closing quote at EOF
|
|
if (quoteSearch === inputLen - 1)
|
|
{
|
|
var value = input.substring(cursor, quoteSearch).replace(quoteCharRegex, quoteChar);
|
|
return finish(value);
|
|
}
|
|
|
|
// If this quote is escaped, it's part of the data; skip it
|
|
// If the quote character is the escape character, then check if the next character is the escape character
|
|
if (quoteChar === escapeChar && input[quoteSearch + 1] === escapeChar)
|
|
{
|
|
quoteSearch++;
|
|
continue;
|
|
}
|
|
|
|
// If the quote character is not the escape character, then check if the previous character was the escape character
|
|
if (quoteChar !== escapeChar && quoteSearch !== 0 && input[quoteSearch - 1] === escapeChar)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if(nextDelim !== -1 && nextDelim < (quoteSearch + 1)) {
|
|
nextDelim = input.indexOf(delim, (quoteSearch + 1));
|
|
}
|
|
if(nextNewline !== -1 && nextNewline < (quoteSearch + 1)) {
|
|
nextNewline = input.indexOf(newline, (quoteSearch + 1));
|
|
}
|
|
// Check up to nextDelim or nextNewline, whichever is closest
|
|
var checkUpTo = nextNewline === -1 ? nextDelim : Math.min(nextDelim, nextNewline);
|
|
var spacesBetweenQuoteAndDelimiter = extraSpaces(checkUpTo);
|
|
|
|
// Closing quote followed by delimiter or 'unnecessary spaces + delimiter'
|
|
if (input[quoteSearch + 1 + spacesBetweenQuoteAndDelimiter] === delim)
|
|
{
|
|
row.push(input.substring(cursor, quoteSearch).replace(quoteCharRegex, quoteChar));
|
|
cursor = quoteSearch + 1 + spacesBetweenQuoteAndDelimiter + delimLen;
|
|
|
|
// If char after following delimiter is not quoteChar, we find next quote char position
|
|
if (input[quoteSearch + 1 + spacesBetweenQuoteAndDelimiter + delimLen] !== quoteChar)
|
|
{
|
|
quoteSearch = input.indexOf(quoteChar, cursor);
|
|
}
|
|
nextDelim = input.indexOf(delim, cursor);
|
|
nextNewline = input.indexOf(newline, cursor);
|
|
break;
|
|
}
|
|
|
|
var spacesBetweenQuoteAndNewLine = extraSpaces(nextNewline);
|
|
|
|
// Closing quote followed by newline or 'unnecessary spaces + newLine'
|
|
if (input.substring(quoteSearch + 1 + spacesBetweenQuoteAndNewLine, quoteSearch + 1 + spacesBetweenQuoteAndNewLine + newlineLen) === newline)
|
|
{
|
|
row.push(input.substring(cursor, quoteSearch).replace(quoteCharRegex, quoteChar));
|
|
saveRow(quoteSearch + 1 + spacesBetweenQuoteAndNewLine + newlineLen);
|
|
nextDelim = input.indexOf(delim, cursor); // because we may have skipped the nextDelim in the quoted field
|
|
quoteSearch = input.indexOf(quoteChar, cursor); // we search for first quote in next line
|
|
|
|
if (stepIsFunction)
|
|
{
|
|
doStep();
|
|
if (aborted)
|
|
return returnable();
|
|
}
|
|
|
|
if (preview && data.length >= preview)
|
|
return returnable(true);
|
|
|
|
break;
|
|
}
|
|
|
|
|
|
// Checks for valid closing quotes are complete (escaped quotes or quote followed by EOF/delimiter/newline) -- assume these quotes are part of an invalid text string
|
|
errors.push({
|
|
type: 'Quotes',
|
|
code: 'InvalidQuotes',
|
|
message: 'Trailing quote on quoted field is malformed',
|
|
row: data.length, // row has yet to be inserted
|
|
index: cursor
|
|
});
|
|
|
|
quoteSearch++;
|
|
continue;
|
|
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
// Comment found at start of new line
|
|
if (comments && row.length === 0 && input.substring(cursor, cursor + commentsLen) === comments)
|
|
{
|
|
if (nextNewline === -1) // Comment ends at EOF
|
|
return returnable();
|
|
cursor = nextNewline + newlineLen;
|
|
nextNewline = input.indexOf(newline, cursor);
|
|
nextDelim = input.indexOf(delim, cursor);
|
|
continue;
|
|
}
|
|
|
|
// Next delimiter comes before next newline, so we've reached end of field
|
|
if (nextDelim !== -1 && (nextDelim < nextNewline || nextNewline === -1))
|
|
{
|
|
// we check, if we have quotes, because delimiter char may be part of field enclosed in quotes
|
|
if (quoteSearch > nextDelim) {
|
|
// we have quotes, so we try to find the next delimiter not enclosed in quotes and also next starting quote char
|
|
var nextDelimObj = getNextUnquotedDelimiter(nextDelim, quoteSearch, nextNewline);
|
|
|
|
// if we have next delimiter char which is not enclosed in quotes
|
|
if (nextDelimObj && typeof nextDelimObj.nextDelim !== 'undefined') {
|
|
nextDelim = nextDelimObj.nextDelim;
|
|
quoteSearch = nextDelimObj.quoteSearch;
|
|
row.push(input.substring(cursor, nextDelim));
|
|
cursor = nextDelim + delimLen;
|
|
// we look for next delimiter char
|
|
nextDelim = input.indexOf(delim, cursor);
|
|
continue;
|
|
}
|
|
} else {
|
|
row.push(input.substring(cursor, nextDelim));
|
|
cursor = nextDelim + delimLen;
|
|
nextDelim = input.indexOf(delim, cursor);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// End of row
|
|
if (nextNewline !== -1)
|
|
{
|
|
row.push(input.substring(cursor, nextNewline));
|
|
saveRow(nextNewline + newlineLen);
|
|
|
|
if (stepIsFunction)
|
|
{
|
|
doStep();
|
|
if (aborted)
|
|
return returnable();
|
|
}
|
|
|
|
if (preview && data.length >= preview)
|
|
return returnable(true);
|
|
|
|
continue;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
|
|
return finish();
|
|
|
|
|
|
function pushRow(row)
|
|
{
|
|
data.push(row);
|
|
lastCursor = cursor;
|
|
}
|
|
|
|
/**
|
|
* checks if there are extra spaces after closing quote and given index without any text
|
|
* if Yes, returns the number of spaces
|
|
*/
|
|
function extraSpaces(index) {
|
|
var spaceLength = 0;
|
|
if (index !== -1) {
|
|
var textBetweenClosingQuoteAndIndex = input.substring(quoteSearch + 1, index);
|
|
if (textBetweenClosingQuoteAndIndex && textBetweenClosingQuoteAndIndex.trim() === '') {
|
|
spaceLength = textBetweenClosingQuoteAndIndex.length;
|
|
}
|
|
}
|
|
return spaceLength;
|
|
}
|
|
|
|
/**
|
|
* Appends the remaining input from cursor to the end into
|
|
* row, saves the row, calls step, and returns the results.
|
|
*/
|
|
function finish(value)
|
|
{
|
|
if (ignoreLastRow)
|
|
return returnable();
|
|
if (typeof value === 'undefined')
|
|
value = input.substring(cursor);
|
|
row.push(value);
|
|
cursor = inputLen; // important in case parsing is paused
|
|
pushRow(row);
|
|
if (stepIsFunction)
|
|
doStep();
|
|
return returnable();
|
|
}
|
|
|
|
/**
|
|
* Appends the current row to the results. It sets the cursor
|
|
* to newCursor and finds the nextNewline. The caller should
|
|
* take care to execute user's step function and check for
|
|
* preview and end parsing if necessary.
|
|
*/
|
|
function saveRow(newCursor)
|
|
{
|
|
cursor = newCursor;
|
|
pushRow(row);
|
|
row = [];
|
|
nextNewline = input.indexOf(newline, cursor);
|
|
}
|
|
|
|
/** Returns an object with the results, errors, and meta. */
|
|
function returnable(stopped)
|
|
{
|
|
return {
|
|
data: data,
|
|
errors: errors,
|
|
meta: {
|
|
delimiter: delim,
|
|
linebreak: newline,
|
|
aborted: aborted,
|
|
truncated: !!stopped,
|
|
cursor: lastCursor + (baseIndex || 0)
|
|
}
|
|
};
|
|
}
|
|
|
|
/** Executes the user's step function and resets data & errors. */
|
|
function doStep()
|
|
{
|
|
step(returnable());
|
|
data = [];
|
|
errors = [];
|
|
}
|
|
|
|
/** Gets the delimiter character, which is not inside the quoted field */
|
|
function getNextUnquotedDelimiter(nextDelim, quoteSearch, newLine) {
|
|
var result = {
|
|
nextDelim: undefined,
|
|
quoteSearch: undefined
|
|
};
|
|
// get the next closing quote character
|
|
var nextQuoteSearch = input.indexOf(quoteChar, quoteSearch + 1);
|
|
|
|
// if next delimiter is part of a field enclosed in quotes
|
|
if (nextDelim > quoteSearch && nextDelim < nextQuoteSearch && (nextQuoteSearch < newLine || newLine === -1)) {
|
|
// get the next delimiter character after this one
|
|
var nextNextDelim = input.indexOf(delim, nextQuoteSearch);
|
|
|
|
// if there is no next delimiter, return default result
|
|
if (nextNextDelim === -1) {
|
|
return result;
|
|
}
|
|
// find the next opening quote char position
|
|
if (nextNextDelim > nextQuoteSearch) {
|
|
nextQuoteSearch = input.indexOf(quoteChar, nextQuoteSearch + 1);
|
|
}
|
|
// try to get the next delimiter position
|
|
result = getNextUnquotedDelimiter(nextNextDelim, nextQuoteSearch, newLine);
|
|
} else {
|
|
result = {
|
|
nextDelim: nextDelim,
|
|
quoteSearch: quoteSearch
|
|
};
|
|
}
|
|
|
|
return result;
|
|
}
|
|
};
|
|
|
|
/** Sets the abort flag */
|
|
this.abort = function()
|
|
{
|
|
aborted = true;
|
|
};
|
|
|
|
/** Gets the cursor position */
|
|
this.getCharIndex = function()
|
|
{
|
|
return cursor;
|
|
};
|
|
}
|
|
|
|
|
|
function newWorker()
|
|
{
|
|
if (!Papa.WORKERS_SUPPORTED)
|
|
return false;
|
|
|
|
var workerUrl = getWorkerBlob();
|
|
var w = new global.Worker(workerUrl);
|
|
w.onmessage = mainThreadReceivedMessage;
|
|
w.id = workerIdCounter++;
|
|
workers[w.id] = w;
|
|
return w;
|
|
}
|
|
|
|
/** Callback when main thread receives a message */
|
|
function mainThreadReceivedMessage(e)
|
|
{
|
|
var msg = e.data;
|
|
var worker = workers[msg.workerId];
|
|
var aborted = false;
|
|
|
|
if (msg.error)
|
|
worker.userError(msg.error, msg.file);
|
|
else if (msg.results && msg.results.data)
|
|
{
|
|
var abort = function() {
|
|
aborted = true;
|
|
completeWorker(msg.workerId, { data: [], errors: [], meta: { aborted: true } });
|
|
};
|
|
|
|
var handle = {
|
|
abort: abort,
|
|
pause: notImplemented,
|
|
resume: notImplemented
|
|
};
|
|
|
|
if (isFunction(worker.userStep))
|
|
{
|
|
for (var i = 0; i < msg.results.data.length; i++)
|
|
{
|
|
worker.userStep({
|
|
data: msg.results.data[i],
|
|
errors: msg.results.errors,
|
|
meta: msg.results.meta
|
|
}, handle);
|
|
if (aborted)
|
|
break;
|
|
}
|
|
delete msg.results; // free memory ASAP
|
|
}
|
|
else if (isFunction(worker.userChunk))
|
|
{
|
|
worker.userChunk(msg.results, handle, msg.file);
|
|
delete msg.results;
|
|
}
|
|
}
|
|
|
|
if (msg.finished && !aborted)
|
|
completeWorker(msg.workerId, msg.results);
|
|
}
|
|
|
|
function completeWorker(workerId, results) {
|
|
var worker = workers[workerId];
|
|
if (isFunction(worker.userComplete))
|
|
worker.userComplete(results);
|
|
worker.terminate();
|
|
delete workers[workerId];
|
|
}
|
|
|
|
function notImplemented() {
|
|
throw new Error('Not implemented.');
|
|
}
|
|
|
|
/** Callback when worker thread receives a message */
|
|
function workerThreadReceivedMessage(e)
|
|
{
|
|
var msg = e.data;
|
|
|
|
if (typeof Papa.WORKER_ID === 'undefined' && msg)
|
|
Papa.WORKER_ID = msg.workerId;
|
|
|
|
if (typeof msg.input === 'string')
|
|
{
|
|
global.postMessage({
|
|
workerId: Papa.WORKER_ID,
|
|
results: Papa.parse(msg.input, msg.config),
|
|
finished: true
|
|
});
|
|
}
|
|
else if ((global.File && msg.input instanceof File) || msg.input instanceof Object) // thank you, Safari (see issue #106)
|
|
{
|
|
var results = Papa.parse(msg.input, msg.config);
|
|
if (results)
|
|
global.postMessage({
|
|
workerId: Papa.WORKER_ID,
|
|
results: results,
|
|
finished: true
|
|
});
|
|
}
|
|
}
|
|
|
|
/** Makes a deep copy of an array or object (mostly) */
|
|
function copy(obj)
|
|
{
|
|
if (typeof obj !== 'object' || obj === null)
|
|
return obj;
|
|
var cpy = Array.isArray(obj) ? [] : {};
|
|
for (var key in obj)
|
|
cpy[key] = copy(obj[key]);
|
|
return cpy;
|
|
}
|
|
|
|
function bindFunction(f, self)
|
|
{
|
|
return function() { f.apply(self, arguments); };
|
|
}
|
|
|
|
function isFunction(func)
|
|
{
|
|
return typeof func === 'function';
|
|
}
|
|
|
|
return Papa;
|
|
}));
|