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