98 lines
2.6 KiB
JavaScript
98 lines
2.6 KiB
JavaScript
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var xhr = require('xhr')
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var noop = function(){}
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var parseASCII = require('parse-bmfont-ascii')
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var parseXML = require('parse-bmfont-xml')
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var readBinary = require('parse-bmfont-binary')
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var isBinaryFormat = require('./lib/is-binary')
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var xtend = require('xtend')
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var xml2 = (function hasXML2() {
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return self.XMLHttpRequest && "withCredentials" in new XMLHttpRequest
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})()
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module.exports = function(opt, cb) {
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cb = typeof cb === 'function' ? cb : noop
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if (typeof opt === 'string')
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opt = { uri: opt }
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else if (!opt)
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opt = {}
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var expectBinary = opt.binary
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if (expectBinary)
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opt = getBinaryOpts(opt)
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xhr(opt, function(err, res, body) {
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if (err)
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return cb(err)
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if (!/^2/.test(res.statusCode))
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return cb(new Error('http status code: '+res.statusCode))
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if (!body)
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return cb(new Error('no body result'))
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var binary = false
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//if the response type is an array buffer,
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//we need to convert it into a regular Buffer object
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if (isArrayBuffer(body)) {
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var array = new Uint8Array(body)
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body = new Buffer(array, 'binary')
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}
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//now check the string/Buffer response
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//and see if it has a binary BMF header
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if (isBinaryFormat(body)) {
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binary = true
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//if we have a string, turn it into a Buffer
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if (typeof body === 'string')
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body = new Buffer(body, 'binary')
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}
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//we are not parsing a binary format, just ASCII/XML/etc
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if (!binary) {
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//might still be a buffer if responseType is 'arraybuffer'
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if (Buffer.isBuffer(body))
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body = body.toString(opt.encoding)
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body = body.trim()
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}
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var result
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try {
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var type = res.headers['content-type']
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if (binary)
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result = readBinary(body)
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else if (/json/.test(type) || body.charAt(0) === '{')
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result = JSON.parse(body)
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else if (/xml/.test(type) || body.charAt(0) === '<')
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result = parseXML(body)
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else
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result = parseASCII(body)
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} catch (e) {
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cb(new Error('error parsing font '+e.message))
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cb = noop
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}
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cb(null, result)
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})
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}
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function isArrayBuffer(arr) {
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var str = Object.prototype.toString
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return str.call(arr) === '[object ArrayBuffer]'
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}
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function getBinaryOpts(opt) {
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//IE10+ and other modern browsers support array buffers
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if (xml2)
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return xtend(opt, { responseType: 'arraybuffer' })
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if (typeof self.XMLHttpRequest === 'undefined')
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throw new Error('your browser does not support XHR loading')
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//IE9 and XML1 browsers could still use an override
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var req = new self.XMLHttpRequest()
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req.overrideMimeType('text/plain; charset=x-user-defined')
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return xtend({
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xhr: req
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}, opt)
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}
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