序列化使用 Alamofire 发布数据时出现失败错误

Question

我正在尝试使用Alamofire将一些文本数据和图像保存到服务器，但是我收到以下错误：

FAILURE： responseSerializationFailed（Alamofire.AFError.ResponseSerializationFailureReason.jsonSerializationFailed（Error Domain=NSCocoaErrorDomain Code=3840 "字符 0 周围的值无效。"用户信息={NSDebugDescription=字符 0 周围的值无效。

我的代码：

internal func postContent(forApi Name:String, image:UIImage?, withData payload:[String: String], success: ((_ response:[String: AnyObject])->Void)?, failure: ((Error)->Void)?) {
    //create Alamofire request
    //if everything was fine call success block with people array passed into it
    //if failure occurred, call failure block with error.
    if(isConnectedToNetwork()){
        let url = SharedConstants.baseURL+Name
        print("url "+SharedConstants.baseURL+Name)
        Alamofire.upload(multipartFormData: { (multipartFormData) in
            if let img = image {
                multipartFormData.append(UIImageJPEGRepresentation(img, 0.5)!, withName: "photo_path", fileName: "swift_file.jpeg", mimeType: "image/jpeg")
            }
            for (key, value) in payload {
                multipartFormData.append(value.data(using: .utf8)!, withName: key)
            }
        }, to: url, method: .post , headers:nil, encodingCompletion: { (result) in
            switch result {
            case .success(let upload, _, _):
                upload.responseJSON(completionHandler: { (response) in
                    print(response.request)  // original URL request
                    print(response.response) // URL response
                    print(response.data)     // server data
                    print(response.result)   // result of response serialization
                    if let JSON = response.result.value {
                        print(JSON)
                        success!(JSON as! [String: AnyObject])
                    }
                    else{
                        failure!(ErrorType.noRecordFound)
                    }
                })
            case .failure(let error):
                print(error)
            }
        })
    }
    else{
        failure!(ErrorType.internetNotWorking)
    }
}

提前致谢

Answer 1

iOS 代码

正确，后端代码有问题。JSON 格式不正确。我纠正了后端的 json 形成，它开始正常工作。

Answer 2

let headers:HTTPHeaders = ["Authorization": "Bearer " + token2Save]
let moreheaders:Parameters = ["Dropbox-API-Arg": ["path":sourcePath]]
Alamofire.request("https://content.dropboxapi.com/2/files/download", parameters: moreheaders, encoding: URLEncoding(destination: .queryString), headers: headers).responseJSON { feedback in
        guard feedback.result.value != nil else {
            print("Error: did not receive data", print("request (request) feedback (feedback)"))
            return

URLEncoding（destination： .queryString）， headers： headers）.responseJSON

Replace responseJSON with responseString and check your response  from webservice.. it will lead to get the error line.

指：

https://stackoverflow.com/a/43041931/5215474

将 responseJSON 替换为 responseString，并检查您的响应来自 网络服务..这将导致获得错误线。

Answer 3

前端发送参数：

 {
"delivery_method": [{
    "vehicle_type": "walk",
    "vehicle_id": "1",
    "vehicle_color": "",
    "vehicle_brand": "",
    "vehicle_image": "",
    "vehicle_number": "",
    "mode_type": "1",
    "vehicle_model": ""
}, {
    "vehicle_type": "scooter",
    "vehicle_id": "4",
    "vehicle_color": "",
    "vehicle_brand": "",
    "vehicle_image": "",
    "vehicle_number": "",
    "mode_type": "1",
    "vehicle_model": ""
}]
}

当我像这样解析 JSON 时JSON.parse(params[:delivery_method])抛出错误。因此，我们可以为 json 创建一个参数。

data=JSON.parse(params[:delivery_method].to_json) # no exception.

Answer 4

检查 url 中的路径可能是您缺少某个文件夹。