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112 lines
2.6 KiB
112 lines
2.6 KiB
'use strict' |
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var uuid = require('uuid') |
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var CombinedStream = require('combined-stream') |
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var isstream = require('isstream') |
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var Buffer = require('safe-buffer').Buffer |
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function Multipart (request) { |
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this.request = request |
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this.boundary = uuid() |
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this.chunked = false |
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this.body = null |
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} |
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Multipart.prototype.isChunked = function (options) { |
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var self = this |
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var chunked = false |
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var parts = options.data || options |
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if (!parts.forEach) { |
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self.request.emit('error', new Error('Argument error, options.multipart.')) |
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} |
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if (options.chunked !== undefined) { |
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chunked = options.chunked |
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} |
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if (self.request.getHeader('transfer-encoding') === 'chunked') { |
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chunked = true |
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} |
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if (!chunked) { |
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parts.forEach(function (part) { |
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if (typeof part.body === 'undefined') { |
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self.request.emit('error', new Error('Body attribute missing in multipart.')) |
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} |
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if (isstream(part.body)) { |
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chunked = true |
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} |
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}) |
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} |
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return chunked |
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} |
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Multipart.prototype.setHeaders = function (chunked) { |
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var self = this |
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if (chunked && !self.request.hasHeader('transfer-encoding')) { |
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self.request.setHeader('transfer-encoding', 'chunked') |
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} |
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var header = self.request.getHeader('content-type') |
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if (!header || header.indexOf('multipart') === -1) { |
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self.request.setHeader('content-type', 'multipart/related; boundary=' + self.boundary) |
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} else { |
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if (header.indexOf('boundary') !== -1) { |
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self.boundary = header.replace(/.*boundary=([^\s;]+).*/, '$1') |
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} else { |
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self.request.setHeader('content-type', header + '; boundary=' + self.boundary) |
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} |
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} |
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} |
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Multipart.prototype.build = function (parts, chunked) { |
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var self = this |
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var body = chunked ? new CombinedStream() : [] |
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function add (part) { |
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if (typeof part === 'number') { |
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part = part.toString() |
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} |
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return chunked ? body.append(part) : body.push(Buffer.from(part)) |
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} |
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if (self.request.preambleCRLF) { |
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add('\r\n') |
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} |
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parts.forEach(function (part) { |
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var preamble = '--' + self.boundary + '\r\n' |
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Object.keys(part).forEach(function (key) { |
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if (key === 'body') { return } |
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preamble += key + ': ' + part[key] + '\r\n' |
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}) |
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preamble += '\r\n' |
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add(preamble) |
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add(part.body) |
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add('\r\n') |
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}) |
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add('--' + self.boundary + '--') |
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if (self.request.postambleCRLF) { |
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add('\r\n') |
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} |
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return body |
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} |
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Multipart.prototype.onRequest = function (options) { |
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var self = this |
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var chunked = self.isChunked(options) |
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var parts = options.data || options |
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self.setHeaders(chunked) |
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self.chunked = chunked |
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self.body = self.build(parts, chunked) |
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} |
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exports.Multipart = Multipart
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