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papaparse.js
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/*!
Papa Parse
v4.1.2
https://github.com/mholt/PapaParse
*/
(function(root, factory)
{
if (typeof define === 'function' && define.amd)
{
// AMD. Register as an anonymous module.
define([], factory);
}
else if (typeof module === 'object' && module.exports)
{
// Node. Does not work with strict CommonJS, but
// only CommonJS-like environments that support module.exports,
// like Node.
module.exports = factory();
}
else
{
// Browser globals (root is window)
root.Papa = factory();
}
}(this, function()
{
'use strict';
var global = Function('return this')();
var IS_WORKER = !global.document && !!global.postMessage,
IS_PAPA_WORKER = IS_WORKER && /(\?|&)papaworker(=|&|$)/.test(global.location.search),
LOADED_SYNC = false, AUTO_SCRIPT_PATH;
var workers = {}, workerIdCounter = 0;
var Papa = {};
Papa.parse = CsvToJson;
Papa.unparse = JsonToCsv;
Papa.RECORD_SEP = String.fromCharCode(30);
Papa.UNIT_SEP = String.fromCharCode(31);
Papa.BYTE_ORDER_MARK = '\ufeff';
Papa.BAD_DELIMITERS = ['\r', '\n', '"', Papa.BYTE_ORDER_MARK];
Papa.WORKERS_SUPPORTED = !IS_WORKER && !!global.Worker;
Papa.SCRIPT_PATH = null; // Must be set by your code if you use workers and this lib is loaded asynchronously
// Configurable chunk sizes for local and remote files, respectively
Papa.LocalChunkSize = 1024 * 1024 * 10; // 10 MB
Papa.RemoteChunkSize = 1024 * 1024 * 5; // 5 MB
Papa.DefaultDelimiter = ','; // Used if not specified and detection fails
// Exposed for testing and development only
Papa.Parser = Parser;
Papa.ParserHandle = ParserHandle;
Papa.NetworkStreamer = NetworkStreamer;
Papa.FileStreamer = FileStreamer;
Papa.StringStreamer = StringStreamer;
if (global.jQuery)
{
var $ = global.jQuery;
$.fn.parse = function(options)
{
var config = options.config || {};
var queue = [];
this.each(function(idx)
{
var supported = $(this).prop('tagName').toUpperCase() === 'INPUT'
&& $(this).attr('type').toLowerCase() === 'file'
&& global.FileReader;
if (!supported || !this.files || this.files.length === 0)
return true; // continue to next input element
for (var i = 0; i < this.files.length; i++)
{
queue.push({
file: this.files[i],
inputElem: this,
instanceConfig: $.extend({}, config)
});
}
});
parseNextFile(); // begin parsing
return this; // maintains chainability
function parseNextFile()
{
if (queue.length === 0)
{
if (isFunction(options.complete))
options.complete();
return;
}
var f = queue[0];
if (isFunction(options.before))
{
var returned = options.before(f.file, f.inputElem);
if (typeof returned === 'object')
{
if (returned.action === 'abort')
{
error('AbortError', f.file, f.inputElem, returned.reason);
return; // Aborts all queued files immediately
}
else if (returned.action === 'skip')
{
fileComplete(); // parse the next file in the queue, if any
return;
}
else if (typeof returned.config === 'object')
f.instanceConfig = $.extend(f.instanceConfig, returned.config);
}
else if (returned === 'skip')
{
fileComplete(); // parse the next file in the queue, if any
return;
}
}
// Wrap up the user's complete callback, if any, so that ours also gets executed
var userCompleteFunc = f.instanceConfig.complete;
f.instanceConfig.complete = function(results)
{
if (isFunction(userCompleteFunc))
userCompleteFunc(results, f.file, f.inputElem);
fileComplete();
};
Papa.parse(f.file, f.instanceConfig);
}
function error(name, file, elem, reason)
{
if (isFunction(options.error))
options.error({name: name}, file, elem, reason);
}
function fileComplete()
{
queue.splice(0, 1);
parseNextFile();
}
}
}
if (IS_PAPA_WORKER)
{
global.onmessage = workerThreadReceivedMessage;
}
else if (Papa.WORKERS_SUPPORTED)
{
AUTO_SCRIPT_PATH = getScriptPath();
// Check if the script was loaded synchronously
if (!document.body)
{
// Body doesn't exist yet, must be synchronous
LOADED_SYNC = true;
}
else
{
document.addEventListener('DOMContentLoaded', function () {
LOADED_SYNC = true;
}, true);
}
}
function CsvToJson(_input, _config)
{
_config = _config || {};
_config.dynamicTyping = _config.dynamicTyping || false;
if (_config.worker && Papa.WORKERS_SUPPORTED)
{
var w = newWorker();
w.userStep = _config.step;
w.userChunk = _config.chunk;
w.userComplete = _config.complete;
w.userError = _config.error;
_config.step = isFunction(_config.step);
_config.chunk = isFunction(_config.chunk);
_config.complete = isFunction(_config.complete);
_config.error = isFunction(_config.error);
delete _config.worker; // prevent infinite loop
w.postMessage({
input: _input,
config: _config,
workerId: w.id
});
return;
}
var streamer = null;
if (typeof _input === 'string')
{
if (_config.download)
streamer = new NetworkStreamer(_config);
else
streamer = new StringStreamer(_config);
}
else if ((global.File && _input instanceof File) || _input instanceof Object) // ...Safari. (see issue #106)
streamer = new FileStreamer(_config);
return streamer.stream(_input);
}
function JsonToCsv(_input, _config)
{
var _output = '';
var _fields = [];
// Default configuration
/** whether to surround every datum with quotes */
var _quotes = false;
/** whether to write headers */
var _writeHeader = true;
/** delimiting character */
var _delimiter = ',';
/** newline character(s) */
var _newline = '\r\n';
/** quote character */
var _quoteChar = '"';
unpackConfig();
var quoteCharRegex = new RegExp(_quoteChar, 'g');
if (typeof _input === 'string')
_input = JSON.parse(_input);
if (_input instanceof Array)
{
if (!_input.length || _input[0] instanceof Array)
return serialize(null, _input);
else if (typeof _input[0] === 'object')
return serialize(objectKeys(_input[0]), _input);
}
else if (typeof _input === 'object')
{
if (typeof _input.data === 'string')
_input.data = JSON.parse(_input.data);
if (_input.data instanceof Array)
{
if (!_input.fields)
_input.fields = _input.meta && _input.meta.fields;
if (!_input.fields)
_input.fields = _input.data[0] instanceof Array
? _input.fields
: objectKeys(_input.data[0]);
if (!(_input.data[0] instanceof Array) && typeof _input.data[0] !== 'object')
_input.data = [_input.data]; // handles input like [1,2,3] or ['asdf']
}
return serialize(_input.fields || [], _input.data || []);
}
// Default (any valid paths should return before this)
throw 'exception: Unable to serialize unrecognized input';
function unpackConfig()
{
if (typeof _config !== 'object')
return;
if (typeof _config.delimiter === 'string'
&& _config.delimiter.length === 1
&& Papa.BAD_DELIMITERS.indexOf(_config.delimiter) === -1)
{
_delimiter = _config.delimiter;
}
if (typeof _config.quotes === 'boolean'
|| _config.quotes instanceof Array)
_quotes = _config.quotes;
if (typeof _config.newline === 'string')
_newline = _config.newline;
if (typeof _config.quoteChar === 'string')
_quoteChar = _config.quoteChar;
if (typeof _config.header === 'boolean')
_writeHeader = _config.header;
}
/** Turns an object's keys into an array */
function objectKeys(obj)
{
if (typeof obj !== 'object')
return [];
var keys = [];
for (var key in obj)
keys.push(key);
return keys;
}
/** The double for loop that iterates the data and writes out a CSV string including header row */
function serialize(fields, data)
{
var csv = '';
if (typeof fields === 'string')
fields = JSON.parse(fields);
if (typeof data === 'string')
data = JSON.parse(data);
var hasHeader = fields instanceof Array && fields.length > 0;
var dataKeyedByField = !(data[0] instanceof Array);
// If there a header row, write it first
if (hasHeader && _writeHeader)
{
for (var i = 0; i < fields.length; i++)
{
if (i > 0)
csv += _delimiter;
csv += safe(fields[i], i);
}
if (data.length > 0)
csv += _newline;
}
// Then write out the data
for (var row = 0; row < data.length; row++)
{
var maxCol = hasHeader ? fields.length : data[row].length;
for (var col = 0; col < maxCol; col++)
{
if (col > 0)
csv += _delimiter;
var colIdx = hasHeader && dataKeyedByField ? fields[col] : col;
csv += safe(data[row][colIdx], col);
}
if (row < data.length - 1)
csv += _newline;
}
return csv;
}
/** Encloses a value around quotes if needed (makes a value safe for CSV insertion) */
function safe(str, col)
{
if (typeof str === 'undefined' || str === null)
return '';
str = str.toString().replace(quoteCharRegex, _quoteChar+_quoteChar);
var needsQuotes = (typeof _quotes === 'boolean' && _quotes)
|| (_quotes instanceof Array && _quotes[col])
|| hasAny(str, Papa.BAD_DELIMITERS)
|| str.indexOf(_delimiter) > -1
|| str.charAt(0) === ' '
|| str.charAt(str.length - 1) === ' ';
return needsQuotes ? _quoteChar + str + _quoteChar : str;
}
function hasAny(str, substrings)
{
for (var i = 0; i < substrings.length; i++)
if (str.indexOf(substrings[i]) > -1)
return true;
return false;
}
}
/** ChunkStreamer is the base prototype for various streamer implementations. */
function ChunkStreamer(config)
{
this._handle = null;
this._paused = false;
this._finished = false;
this._input = null;
this._baseIndex = 0;
this._partialLine = '';
this._rowCount = 0;
this._start = 0;
this._nextChunk = null;
this.isFirstChunk = true;
this._completeResults = {
data: [],
errors: [],
meta: {}
};
replaceConfig.call(this, config);
this.parseChunk = function(chunk)
{
// First chunk pre-processing
if (this.isFirstChunk && isFunction(this._config.beforeFirstChunk))
{
var modifiedChunk = this._config.beforeFirstChunk(chunk);
if (modifiedChunk !== undefined)
chunk = modifiedChunk;
}
this.isFirstChunk = false;
// Rejoin the line we likely just split in two by chunking the file
var aggregate = this._partialLine + chunk;
this._partialLine = '';
var results = this._handle.parse(aggregate, this._baseIndex, !this._finished);
if (this._handle.paused() || this._handle.aborted())
return;
var lastIndex = results.meta.cursor;
if (!this._finished)
{
this._partialLine = aggregate.substring(lastIndex - this._baseIndex);
this._baseIndex = lastIndex;
}
if (results && results.data)
this._rowCount += results.data.length;
var finishedIncludingPreview = this._finished || (this._config.preview && this._rowCount >= this._config.preview);
if (IS_PAPA_WORKER)
{
global.postMessage({
results: results,
workerId: Papa.WORKER_ID,
finished: finishedIncludingPreview
});
}
else if (isFunction(this._config.chunk))
{
this._config.chunk(results, this._handle);
if (this._paused)
return;
results = undefined;
this._completeResults = undefined;
}
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 (finishedIncludingPreview && isFunction(this._config.complete) && (!results || !results.meta.aborted))
this._config.complete(this._completeResults, this._input);
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('GET', this._input, !IS_WORKER);
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);
xhr.setRequestHeader('If-None-Match', 'webkit-no-cache'); // https://bugs.webkit.org/show_bug.cgi?id=82672
}
try {
xhr.send();
}
catch (err) {
this._chunkError(err.message);
}
if (IS_WORKER && xhr.status === 0)
this._chunkError();
else
this._start += this._config.chunkSize;
}
this._chunkLoaded = function()
{
if (xhr.readyState != 4)
return;
if (xhr.status < 200 || xhr.status >= 400)
{
this._chunkError();
return;
}
this._finished = !this._config.chunkSize || this._start > getFileSize(xhr);
this.parseChunk(xhr.responseText);
}
this._chunkError = function(errorMessage)
{
var errorText = xhr.statusText || errorMessage;
this._sendError(errorText);
}
function getFileSize(xhr)
{
var contentRange = xhr.getResponseHeader('Content-Range');
return parseInt(contentRange.substr(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 string;
var remaining;
this.stream = function(s)
{
string = s;
remaining = s;
return this._nextChunk();
}
this._nextChunk = function()
{
if (this._finished) return;
var size = this._config.chunkSize;
var chunk = size ? remaining.substr(0, size) : remaining;
remaining = size ? remaining.substr(size) : '';
this._finished = !remaining;
return this.parseChunk(chunk);
}
}
StringStreamer.prototype = Object.create(StringStreamer.prototype);
StringStreamer.prototype.constructor = StringStreamer;
// Use one ParserHandle per entire CSV file or string
function ParserHandle(_config)
{
// One goal is to minimize the use of regular expressions...
var FLOAT = /^\s*-?(\d*\.?\d+|\d+\.?\d*)(e[-+]?\d+)?\s*$/i;
var self = this;
var _stepCounter = 0; // Number of times step was called (number of rows parsed)
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
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)
{
if (!_config.newline)
_config.newline = guessLineEndings(input);
_delimiterError = false;
if (!_config.delimiter)
{
var delimGuess = guessDelimiter(input, _config.newline);
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(typeof _config.delimiter === 'function')
{
_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();
_input = _input.substr(_parser.getCharIndex());
};
this.resume = function()
{
_paused = false;
self.streamer.parseChunk(_input);
};
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 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 (_results.data[i].length === 1 && _results.data[i][0] === '')
_results.data.splice(i--, 1);
}
if (needsHeaderRow())
fillHeaderFields();
return applyHeaderAndDynamicTyping();
}
function needsHeaderRow()
{
return _config.header && _fields.length === 0;
}
function fillHeaderFields()
{
if (!_results)
return;
for (var i = 0; needsHeaderRow() && i < _results.data.length; i++)
for (var j = 0; j < _results.data[i].length; j++)
_fields.push(_results.data[i][j]);
_results.data.splice(0, 1);
}
function parseDynamic(field, value)
{
if ((_config.dynamicTyping[field] || _config.dynamicTyping) === true)
{
if (value === 'true' || value === 'TRUE')
return true;
else if (value === 'false' || value === 'FALSE')
return false;
else
return tryParseFloat(value);
}
return value;
}
function applyHeaderAndDynamicTyping()
{
if (!_results || (!_config.header && !_config.dynamicTyping))
return _results;
for (var i = 0; i < _results.data.length; i++)
{
var row = _config.header ? {} : [];
for (var j = 0; j < _results.data[i].length; j++)
{
var field = j;
var value = _results.data[i][j];
if (_config.header)
field = j >= _fields.length ? '__parsed_extra' : _fields[j];
value = parseDynamic(field, value);
if (field === '__parsed_extra')
{
row[field] = row[field] || [];
row[field].push(value);
}
else
row[field] = value;
}
_results.data[i] = row;
if (_config.header)
{
if (j > _fields.length)
addError('FieldMismatch', 'TooManyFields', 'Too many fields: expected ' + _fields.length + ' fields but parsed ' + j, i);
else if (j < _fields.length)
addError('FieldMismatch', 'TooFewFields', 'Too few fields: expected ' + _fields.length + ' fields but parsed ' + j, i);
}
}
if (_config.header && _results.meta)
_results.meta.fields = _fields;
return _results;
}
function guessDelimiter(input, newline)
{
var delimChoices = [',', '\t', '|', ';', Papa.RECORD_SEP, Papa.UNIT_SEP];
var bestDelim, bestDelta, fieldCountPrevRow;
for (var i = 0; i < delimChoices.length; i++)
{
var delim = delimChoices[i];
var delta = 0, avgFieldCount = 0;
fieldCountPrevRow = undefined;
var preview = new Parser({
delimiter: delim,
newline: newline,
preview: 10
}).parse(input);
for (var j = 0; j < preview.data.length; j++)
{
var fieldCount = preview.data[j].length;
avgFieldCount += fieldCount;
if (typeof fieldCountPrevRow === 'undefined')
{
fieldCountPrevRow = fieldCount;
continue;
}
else if (fieldCount > 1)
{
delta += Math.abs(fieldCount - fieldCountPrevRow);
fieldCountPrevRow = fieldCount;
}
}
if (preview.data.length > 0)
avgFieldCount /= preview.data.length;
if ((typeof bestDelta === 'undefined' || delta < bestDelta)
&& avgFieldCount > 1.99)
{
bestDelta = delta;
bestDelim = delim;
}
}
_config.delimiter = bestDelim;
return {
successful: !!bestDelim,
bestDelimiter: bestDelim
}
}
function guessLineEndings(input)
{
input = input.substr(0, 1024*1024); // max length 1 MB
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';
}