在 Alamofire 中快速发送 GET 请求中的 json 对象

Question

我正在尝试使用绑定到它的 json 对象执行 GET 请求，这就是我生成 JSON 对象的方式

   let jsonObject: [String: AnyObject] = [

        "ean_code": [
            "type": "match",
            "value": "16743799"
        ]
    ]

然后我执行了请求

喜欢这个

        Alamofire.request(.GET,Constant.WebClient.WS_URL + "/product?filters="+String(jsonObject),parameters:parameters)

但这给了我一个错误，即无法使用无效字符绑定 URL

所以我从这个编码了 URL

let request = String(jsonObject).stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLPasswordAllowedCharacterSet())!

这将对 URL 进行编码，但我再次这将给我以下错误

请求失败并出现错误：Error Domain=NSCocoaErrorDomain Code=3840 “字符 0 周围的值无效。” UserInfo={NSDebugDescription=字符 0 附近的值无效。}

所以我的问题是如何将 json 对象绑定到 GET URL？

Answer 1

您似乎正在尝试通过两种方式添加查询参数：

• 在 URL 字符串的末尾添加一个参数
• 通过向 Alamofire 请求传递参数

当您执行GET 请求时，您的参数无论如何都应该是 URL 编码的，因为 GET 请求不应该有正文。为什么不直接将filters 查询添加到参数中？

let parameters: [String: AnyObject] = [

    "ean_code": [
        "type": "match",
        "value": "16743799"
    ]
]

Alamofire.request(.GET, Constant.WebClient.WS_URL + "/product", parameters: parameters)

Answer 2

做这样的事情

let parameters: [String: AnyObject] = [

    "filters": "merchantName",
    "ean_code": [
        "type": "match",
        "value": "16743799"
    ]
]

do {
    let data = try NSJSONSerialization.dataWithJSONObject(parameters, options: .PrettyPrinted)
    let jsonString = NSString(data: data, encoding: NSUTF8StringEncoding)
    let urlEncodedJson = jsonString!.stringByAddingPercentEncodingWithAllowedCharacters(.URLHostAllowedCharacterSet())
    let urlString = "http://www.filter.com/&params=\(urlEncodedJson!)"
    let url = NSURL(string: urlString)
    // Trigger alaomofire request with url
}
catch let JSONError as NSError {
    print("\(JSONError)")
}

Answer 3

试试：

func encode(json: [String: AnyObject]) -> NSMutableURLRequest {
    let request: NSMutableURLRequest = ...
    if let URLComponents = NSURLComponents(URL: request.URL!, resolvingAgainstBaseURL: false) {
    let percentEncodedQuery = (URLComponents.percentEncodedQuery.map { $0 + "&" } ?? "") + query(json)
    URLComponents.percentEncodedQuery = percentEncodedQuery
    request.URL = URLComponents.URL
    return request
}

func query(parameters: [String: AnyObject]?) -> String {
    guard let parameters = parameters else {
        return ""
    }
    var components: [(String, String)] = []

    for key in parameters.keys.sort(<) {
        let value = parameters[key]!
        components += queryComponents(key, value)
    }

    return (components.map { "\($0)=\($1)" } as [String]).joinWithSeparator("&")
}

func queryComponents(key: String, _ value: AnyObject) -> [(String, String)] {
    var components: [(String, String)] = []

    if let dictionary = value as? [String: AnyObject] {
        for (nestedKey, value) in dictionary {
            components += queryComponents("\(key)[\(nestedKey)]", value)
        }
    } else if let array = value as? [AnyObject] {
        for value in array {
            components += queryComponents("\(key)[]", value)
        }
    } else {
        components.append((key, "\(value)"))
    }

    return components
}

将其用作：

Alamofire.request(encode(json))

这只是代码片段，所以你必须把它放在适当的地方:)