Swift 5 NSURLComponents 查询字符串 %3F

Question

我正在从远程服务器获取 json。

当我构建 url 时，查询字符串是一个 ?，但是，当它通过数据任务发送时， ?被编码为 %3F，我的调用失败了。

如何防止 url组件对查询字符串进行编码？我已经换掉了实际值。

//Note: the host and path are coming from info.plist, I just added them in here.
 string host = servicehost.com 
 string path = "/service/getData?cc=al&lastDate="

 let urlComponents = NSURLComponents.init()
 urlComponents.scheme = "https"
 urlComponents.host = host
 urlComponents.path = path

当我打印出值：时，我得到

print(": urlComponents.url! \(urlComponents.url!)")
https://servicehost.com/service/getData%3Fcc=al&lastDate=

在 dataTask 内部，检查时出现以下错误：

Printing description of error:
▿ DecodingError
  ▿ typeMismatch : 2 elements
    - .0 : Swift.String
    ▿ .1 : Context
      ▿ codingPath : 3 elements
        - 0 : CodingKeys(stringValue: "data", intValue: nil)
        - 1 : CodingKeys(stringValue: "date-published", intValue: nil)
        - 2 : CodingKeys(stringValue: "date", intValue: nil)
      - debugDescription : "Expected to decode String but found a number instead."
      - underlyingError : nil
Printing description of data:
▿ 0 bytes
  - count : 0
  ▿ pointer : 0x00007f90d2fdd000
    - pointerValue : 140259991867392
  - bytes : 0 elements

数据大小为： jsonDecodableTask: 68 bytes

失败信息是：

Failure: dataCorrupted(Swift.DecodingError.Context(codingPath: [], debugDescription: "The given data was not valid JSON.", underlyingError: Optional(Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around character 0." UserInfo={NSDebugDescription=Invalid value around character 0.})))

如果我转到浏览器并输入带有编码查询字符串的 url，我将返回以下内容： <html><head><title>Error</title></head><body>Not Found</body></html>

如果我转到浏览器并将 %3F 更改为 ?，则请求成功。

Answer 1

问题是 "?" 不是路径的一部分。它应该在您添加 URL:

的查询项组件时自动添加

let host = "www.google.com"
let path = "/service/getData"
let queryItems: [URLQueryItem] = [.init(name: "cc", value: "al"),
                                  .init(name: "lastDate", value: "")]
var urlComponents = URLComponents()
urlComponents.scheme = "https"
urlComponents.host = host
urlComponents.path = path
urlComponents.queryItems =  queryItems
urlComponents.url?.absoluteString  // "https://www.google.com/service/getData?cc=al&lastDate="

Swift 5 NSURLComponents 查询字符串 %3F

Swift 5 NSURLComponents Query String %3F

url

encoding

json

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