ios - 阿拉伯文本的 URL 解析错误

Question

我正在尝试使用网络服务将阿拉伯语翻译成英语。构建 URL 时出现错误。我定义了这些情况:

enum MyErrors: Error {
    case urlParsingError(String)
    case nonDictonaryObjectReturned(Any)
}

我的代码是:

func translateWord (text: String, ToLan:String) {

   // the text is "مرحبا" and ToLan is "en"

    do {
        let jsonString = "https://translate.yandex.net/api/v1.5/tr.json/translate?key=apikey&text=\(text)&lang=\(ToLan)"

        guard let url = URL(string: jsonString) else {
            throw MyErrors.urlParsingError(jsonString)
        }

        let data = try Data(contentsOf: url, options: Data.ReadingOptions())

        let jsonObject = try JSONSerialization.jsonObject(with: data,options: .allowFragments)
        guard let dictionary = jsonObject as? [AnyHashable: Any] else {
            throw MyErrors.nonDictonaryObjectReturned(jsonObject)
        }
        let result = dictionary["text"] as? [Any]
        let translattedSTR = result?.first as? String
        let encodedData = translattedSTR?.data(using: String.Encoding.utf8)!
        print(encodedData!)
        self.textresult.text = translattedSTR


    } catch {
        print("caught error \(error)")
    }

但不幸的是，它打印了

caught error urlParsingError(output url)

此外，我的结构看起来像 [this]( https://translate.yandex.net/api/v1.5/tr.json/translate?key= apikey&text=مرحبا&lang=en)

Answer 1

您需要正确编码查询参数的值。一个好的解决方案是使用 URLComponents 来构建您的查询。

然后是这些行:

let jsonString = "https://translate.yandex.net/api/v1.5/tr.json/translate?key=myAPIkey&text=\(text)&lang=\(ToLan)"

guard let url = URL(string: jsonString) else {
    throw MyErrors.urlParsingError(jsonString)
}

需要替换为:

let baseString = "https://translate.yandex.net/api/v1.5/tr.json/translate"
var comps = URLComponents(string: baseString)!
let keyQuery = URLQueryItem(name: "key", value: "myAPIKey")
let textQuery = URLQueryItem(name: "text", value: text)
let langQuery = URLQueryItem(name: "lang", value: ToLan)
comps.queryItems = [ keyQuery, textQuery, langQuery ]
guard let url = comps.url else {
    throw MyErrors.urlParsingError("\(comps)")
}

现在生成的 url 是:

https://translate.yandex.net/api/v1.5/tr.json/translate?key=myAPIkey&text=%D9%85%D8%B1%D8%AD%D8%A8%D8%A7&lang=en