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handle utf8 in polling better

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This commit is contained in:
Erik 2015-03-18 13:05:39 -04:00
parent c67e7a3003
commit 89ae9bd349
2 changed files with 15 additions and 74 deletions
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6
SwiftIO/SocketEngine.swift
View File

@ -406,7 +406,9 @@ public class SocketEngine: NSObject, WebSocketDelegate {
private func parseEngineMessage(var message:String) {
// NSLog("Engine got message: \(message)")
if self.polling {
fixDoubleUTF8(&message)
}
// We should upgrade
if message == "3probe" {
@ -500,9 +502,11 @@ public class SocketEngine: NSObject, WebSocketDelegate {
}
}
private func sendPollMessage(msg:String, withType type:PacketType,
private func sendPollMessage(var msg:String, withType type:PacketType,
datas:[NSData]? = nil) {
// println("Sending poll: \(msg) as type: \(type.rawValue)")
doubleEncodeUTF8(&msg)
let strMsg = "\(type.rawValue)\(msg)"
self.postWait.append(strMsg)

77
SwiftIO/SocketFixUTF8.swift
View File

@ -21,80 +21,17 @@
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
// Adapted from: https://github.com/durbrow/fix-double-utf8.swift
import Foundation
var memoizer = [String: UnicodeScalar]()
func lookup(base:UnicodeScalar, combi:UnicodeScalar) -> UnicodeScalar {
let combined = "\(base)\(combi)"
if let y = memoizer[combined] {
return y
}
for i in 0x80...0xFF {
let ch = UnicodeScalar(i)
if String(ch) == combined {
memoizer[combined] = ch
return ch
}
}
let ch = UnicodeScalar(0xFFFD) // Unicode replacement character <EFBFBD>
memoizer[combined] = ch
return ch
}
func fixDoubleUTF8(inout name:String) {
var isASCII = true
var y = [UInt8]()
for ch in name.unicodeScalars {
if ch.value < 0x80 {
y.append(UInt8(ch))
continue
}
isASCII = false
if ch.value < 0x100 {
y.append(UInt8(ch))
continue
}
// might be a combining character that when combined with the
// preceeding character maps to a codepoint in the UTF8 range
if y.count == 0 {
return
let utf8 = name.dataUsingEncoding(NSISOLatin1StringEncoding, allowLossyConversion: false)!
let latin1 = NSString(data: utf8, encoding: NSUTF8StringEncoding)!
name = latin1 as String
}
let last = y.removeLast()
let repl = lookup(UnicodeScalar(last), ch)
// the replacement needs to be in the UTF8 range
if repl.value >= 0x100 {
return
}
y.append(UInt8(repl))
}
if isASCII {
return
}
y.append(0) // null terminator
return y.withUnsafeBufferPointer {
let cstr = UnsafePointer<CChar>($0.baseAddress) // typecase from uint8_t * to char *
let rslt = String.fromCStringRepairingIllFormedUTF8(cstr) // -> (String, Bool)
if let str = rslt.0 {
if !rslt.hadError {
name = str
}
}
return
}
func doubleEncodeUTF8(inout str:String) {
let latin1 = str.dataUsingEncoding(NSUTF8StringEncoding)!
let utf8 = NSString(data: latin1, encoding: NSISOLatin1StringEncoding)!
str = utf8 as String
}