27 lines
723 B
JavaScript
27 lines
723 B
JavaScript
module.exports = Blob
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var Buffer = require('buffer').Buffer
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, str = {}.toString.call.bind({}.toString)
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function Blob(parts, properties) {
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properties = properties || {}
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this.type = properties.type || ''
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var size = 0
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for(var i = 0, len = parts.length; i < len; ++i) {
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size += typeof parts[i] === 'string' ? Buffer.byteLength(parts[i]) :
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str(parts[i]).indexOf('ArrayBuffer') > -1 ? parts[i].byteLength :
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parts[i].buffer ? parts[i].buffer.byteLength :
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parts[i].length
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}
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this.size = size
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}
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var cons = Blob
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, proto = cons.prototype
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proto.slice = function(start, end) {
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var b = new Blob([], {type: this.type})
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b.size = (end || this.size) - (start || 0)
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return b
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}
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