| 1 | var fs = require('fs'),
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| 2 | WritableStream = require('stream').Writable
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| 3 | || require('readable-stream').Writable,
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| 4 | inherits = require('util').inherits;
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| 5 |
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| 6 | var parseParams = require('./utils').parseParams;
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| 7 |
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| 8 | function Busboy(opts) {
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| 9 | if (!(this instanceof Busboy))
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| 10 | return new Busboy(opts);
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| 11 | if (opts.highWaterMark !== undefined)
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| 12 | WritableStream.call(this, { highWaterMark: opts.highWaterMark });
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| 13 | else
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| 14 | WritableStream.call(this);
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| 15 |
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| 16 | this._done = false;
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| 17 | this._parser = undefined;
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| 18 |
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| 19 | this.opts = opts;
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| 20 | if (opts.headers && typeof opts.headers['content-type'] === 'string')
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| 21 | this.parseHeaders(opts.headers);
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| 22 | else
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| 23 | throw new Error('Missing Content-Type');
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| 24 | }
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| 25 | inherits(Busboy, WritableStream);
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| 26 |
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| 27 | Busboy.prototype.emit = function(ev) {
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| 28 | if (ev === 'finish' && !this._done)
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| 29 | this._parser && this._parser.end();
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| 30 | else
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| 31 | WritableStream.prototype.emit.apply(this, arguments);
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| 32 | };
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| 33 |
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| 34 | Busboy.prototype.parseHeaders = function(headers) {
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| 35 | this._parser = undefined;
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| 36 | if (headers['content-type']) {
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| 37 | var parsed = parseParams(headers['content-type']),
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| 38 | matched, type;
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| 39 | for (var i = 0; i < TYPES_LEN; ++i) {
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| 40 | type = TYPES[i];
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| 41 | if (typeof type.detect === 'function')
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| 42 | matched = type.detect(parsed);
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| 43 | else
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| 44 | matched = type.detect.test(parsed[0]);
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| 45 | if (matched)
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| 46 | break;
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| 47 | }
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| 48 | if (matched) {
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| 49 | var cfg = {
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| 50 | limits: this.opts.limits,
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| 51 | headers: headers,
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| 52 | parsedConType: parsed,
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| 53 | highWaterMark: undefined,
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| 54 | fileHwm: undefined,
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| 55 | defCharset: undefined,
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| 56 | preservePath: false
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| 57 | };
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| 58 | if (this.opts.highWaterMark)
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| 59 | cfg.highWaterMark = this.opts.highWaterMark;
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| 60 | if (this.opts.fileHwm)
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| 61 | cfg.fileHwm = this.opts.fileHwm;
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| 62 | cfg.defCharset = this.opts.defCharset;
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| 63 | cfg.preservePath = this.opts.preservePath;
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| 64 | this._parser = type(this, cfg);
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| 65 | return;
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| 66 | }
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| 67 | }
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| 68 | throw new Error('Unsupported content type: ' + headers['content-type']);
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| 69 | };
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| 70 |
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| 71 | Busboy.prototype._write = function(chunk, encoding, cb) {
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| 72 | if (!this._parser)
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| 73 | return cb(new Error('Not ready to parse. Missing Content-Type?'));
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| 74 | this._parser.write(chunk, cb);
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| 75 | };
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| 76 |
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| 77 | var TYPES = [], TYPES_LEN = 0;
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| 78 | fs.readdirSync(__dirname + '/types').forEach(function(type) {
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| 79 | var typemod = require(__dirname + '/types/' + type);
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| 80 | if (typemod.detect) {
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| 81 | TYPES.push(typemod);
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| 82 | ++TYPES_LEN;
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| 83 | }
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| 84 | });
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| 85 |
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| 86 | module.exports = Busboy;
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