在ISO-8859-1中编码NSURL

Question

我有一个包含TextFields的ViewController,我需要将这些值发送到专用的HTTP服务.我主要担心的是编码类型,因为这个应用程序是法语版,可能包含一些重音符号('é','è'等等...)但我还需要正确格式化我的字段,因为它可能包含空格好....

我尝试使用不同的方法,但我仍然在服务器端编码错误.

这是我的代码示例:

    let url_to_request = "http://11.22.33.44:8080/SRV/addRepertoire"

    var params = "owner=\(User.sharedInstance.email)&adresse=\(adresse.text!)&nom=\(nom.text!)&telephone=\(telephone.text!)&commentaires=\(commentaires.text!)"

    //trying to encode in ISO-8859-1
    let dt = NSString(CString: params, encoding: NSISOLatin1StringEncoding)
    //preparing string to be used in a NSURL
    let final_url = dt!.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())

    print("URL loadRepertoire: \(url_to_request+"?"+final_url!)")

例如,字段"nom"包含"bébé",其编码为"b%C4%82%C5%A0b%C4%82%C5%A0",而我的服务器期望"b%E9b%E9"

EDIT2:

我试着使用以下内容:

        let url_to_request = "http://11.22.33.44:8080/SRV/addRepertoire"

    let params = "owner=\(User.sharedInstance.email)&adresse=\(adresse.text!)&nom=\(nom.text!)&telephone=\(telephone.text!)&commentaires=\(commentaires.text!)"

    let tmp_url = url_to_request + "?" + params
    let final_url = tmp_url.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())!

    print("URL addRepertoire: \(final_url)")

但结果仍然是:

b%C3%83%C2%A9b%C3%83%C2%A9, diplayed bébé instead of bébé

Answer 1

stringByAddingPercentEncodingWithAllowedCharacters 总是使用UTF-8表示,所以我担心你可能需要自己动手.

extension String {
    func stringByAddingPercentEncodingForISOLatin1() -> String? {
        let allowedCharacterSet = NSCharacterSet(charactersInString:
                    "0123456789"
                    + "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
                    + "abcdefghijklmnopqrstuvwxyz"
                    + "_-.~"
                    + "=&" //You'd better remove this and encode each param.
        )
        if let data = self.dataUsingEncoding(NSISOLatin1StringEncoding) {
            var result = ""
            for i in 0..<data.length {
                let ch = UnsafePointer<UInt8>(data.bytes)[i]
                if ch >= 0x80 || !allowedCharacterSet.characterIsMember(unichar(ch)) {
                    result += String(format: "%%%02X", ch)
                } else {
                    result.append(UnicodeScalar(ch))
                }
            }
            return result
        } else {
            return nil
        }
    }
}
"bébé".stringByAddingPercentEncodingForISOLatin1()! //->"b%E9b%E9"