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afnetworking从响应中修剪字符

afnetworking swift ios

raginggoat · 技术社区 · 6 年前

我正在使用afnetworking使用basic auth调用web服务。问题是我得到了

FAILURE: Error Domain=NSCocoaErrorDomain Code=3840 "JSON text did not start with array or object and option to allow fragments not set." UserInfo={NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}

当我允许碎片,我得到

Invalid value around character 0

我和我们的Web开发人员谈过,他用“//”的方式对JSON响应进行前缀,因此我需要在我使用JSON之前修剪这些。我的问题是,我不确定如何访问响应来修剪和使用它,因为代码会立即转到故障块。

let manager = AFHTTPSessionManager(baseURL: URL(string: "http://mydev1.kyfb.com/remote/appinfo.cfc?method=GetMemberInfo"))
            manager.requestSerializer.setAuthorizationHeaderFieldWithUsername(emailTextField.text!, password: passwordTextField.text!)
            // manager.responseSerializer = AFJSONResponseSerializer(readingOptions: .allowFragments)
            // manager.responseSerializer = AFHTTPResponseSerializer()
            manager.post("", parameters: nil, progress: nil, success: {
                (task, responseObject) -> Void in
                // TODO: If error message returned in JSON response, display error
                // else login was successful. Save user info to User object and push AccountTableViewController
                print("RESPONSE OBJECT: \(responseObject!)")
                let responseJSON = responseObject as? [String: AnyObject]
                print("RESPONSE JSON: \(responseJSON)")
                if responseJSON!["MEMBERSHIPNUMBER"] != nil {

                }

            }, failure: {
                (operation, error) -> Void in
                // TODO: Display error
                print("FAILURE: \(error)")
            })
        }

1 回复 | 直到 6 年前

Larme 6 年前

如果你设置了 responseSerializer 作为 AFHTTPResponseSerializer 使用: manager.responseSerializer = AFHTTPResponseSerializer() ,然后 responseObject 应该是 (NS)Data 反对。

做什么:
获取的值 "//" (我们称之为 prefixData )中。
检查是否 响应对象 有它的前缀。
必要时拆下。

let prefixData = "//".data(using: .utf8)!        
//OR let prefixData = Data(bytes: [0x2F, 0x2F])

let responsePrefix = responseObject.subdata(in: Range(0..<2))
if responsePrefix == prefixData {
    let jsonData = responseObject.subdata(in: Range(2..<responseObject.count))
    //You got your JSON to serialize with Codable or JSONSerialization
}

使用强制展开和静默尝试(try?)的示例代码(不要那样做)为了逻辑:

let prefixData = "//".data(using: .utf8)!
print("prefixData from String: \(prefixData as NSData)")

let prefixData2 = Data(bytes: [0x2F, 0x2F])
print("prefixData from Bytes: \(prefixData2 as NSData)")

if prefixData == prefixData2 {
    print("prefixData == prefixData2, use the one you want")
}

let responseObject = "//{\"key\":\"value\"}".data(using: .utf8)!
print("responseObject: \(responseObject as NSData)")

let responsePrefix = responseObject.subdata(in: Range(0..<2))
if responsePrefix == prefixData {
    let jsonData = responseObject.subdata(in: Range(2..<responseObject.count))
    print("jsonData: \(jsonData as NSData)")
    let json = try? JSONSerialization.jsonObject(with: jsonData, options: [])
    print("json: \(json!)")
    let jsonString = String(data: jsonData, encoding: .utf8)
    print("jsonString: \(jsonString!)")
}

输出:

$>来自字符串的前缀数据:<2F2F>
$>来自字节的前缀数据:<2F2F>
$>prefixdata==前缀数据2,使用所需的
$R.2F2F7B22 6B65 7922 3A227 661 6C75 65 22 7D & GT;
$>jsondata:<7B226B65 79223A22 76616C75 65227D>
$>json:可选({
key=值;
})
$>jsonstring:{“key”:“value”}