Ben Davis
47 lines
1.2 KiB
Swift
47 lines
1.2 KiB
Swift
//
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// String+URLEncode.swift
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// BitTorrent
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//
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// Created by Ben Davis on 02/04/2016.
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// Copyright © 2016 Ben Davis. All rights reserved.
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//
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import Foundation
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import BEncode
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extension String {
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static let asciiSpace: UInt8 = 32
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static let asciiPercentage: UInt8 = 37
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init(urlEncodingData data: Data) {
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self = String.urlEncode(data)
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}
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private static func urlEncode(_ data: Data) -> String {
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let allowedCharacters = CharacterSet(charactersIn: "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-_~")
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let result = NSMutableString()
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for i in 0..<data.count {
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let byte = data.correctingIndicies[i]
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if byte == asciiSpace {
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result.append("%20")
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} else if byte == asciiPercentage {
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result.append("%25")
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} else {
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let c = UnicodeScalar(byte)
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if allowedCharacters.contains(c) {
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let string = String(c)
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result.append(string)
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} else {
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result.appendFormat("%%%02X", byte)
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}
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}
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}
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return result as String
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}
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}
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