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var fs = require('fs'), WritableStream = require('stream').Writable, inherits = require('util').inherits;
var parseParams = require('./utils').parseParams;
function Busboy(opts) { if (!(this instanceof Busboy)) return new Busboy(opts); if (opts.highWaterMark !== undefined) WritableStream.call(this, { highWaterMark: opts.highWaterMark }); else WritableStream.call(this);
this._done = false; this._parser = undefined; this._finished = false;
this.opts = opts; if (opts.headers && typeof opts.headers['content-type'] === 'string') this.parseHeaders(opts.headers); else throw new Error('Missing Content-Type'); } inherits(Busboy, WritableStream);
Busboy.prototype.emit = function(ev) { if (ev === 'finish') { if (!this._done) { this._parser && this._parser.end(); return; } else if (this._finished) { return; } this._finished = true; } WritableStream.prototype.emit.apply(this, arguments); };
Busboy.prototype.parseHeaders = function(headers) { this._parser = undefined; if (headers['content-type']) { var parsed = parseParams(headers['content-type']), matched, type; for (var i = 0; i < TYPES.length; ++i) { type = TYPES[i]; if (typeof type.detect === 'function') matched = type.detect(parsed); else matched = type.detect.test(parsed[0]); if (matched) break; } if (matched) { var cfg = { limits: this.opts.limits, headers: headers, parsedConType: parsed, highWaterMark: undefined, fileHwm: undefined, defCharset: undefined, preservePath: false }; if (this.opts.highWaterMark) cfg.highWaterMark = this.opts.highWaterMark; if (this.opts.fileHwm) cfg.fileHwm = this.opts.fileHwm; cfg.defCharset = this.opts.defCharset; cfg.preservePath = this.opts.preservePath; this._parser = type(this, cfg); return; } } throw new Error('Unsupported content type: ' + headers['content-type']); };
Busboy.prototype._write = function(chunk, encoding, cb) { if (!this._parser) return cb(new Error('Not ready to parse. Missing Content-Type?')); this._parser.write(chunk, cb); };
var TYPES = [ require('./types/multipart'), require('./types/urlencoded'), ];
module.exports = Busboy;
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