通过 Swift 3 和 Alamofire 4 使用 JSON 和自定义 headers 上传照片/文件 | iOS | Swift

Question

我需要使用图像文件和 JSON 调用多部分请求。

我试过了，还是报错。

 // define parameters
  let parameters = [
    "hometown": "yalikavak",
    "living": "istanbul"
  ]

Alamofire.upload(multipartFormData: { multipartFormData in
    if let imageData = UIImageJPEGRepresentation(image, 1) {
      multipartFormData.append(imageData, withName: "file", fileName: "file.png", mimeType: "image/png")
    }

    for (key, value) in parameters {
      multipartFormData.append((value?.data(using: .utf8))!, withName: key)
    }}, to: "upload_url", method: .post, headers: ["Authorization": "auth_token"],
        encodingCompletion: { encodingResult in
          switch encodingResult {
          case .success(let upload, _, _):
            upload.response { [weak self] response in
              guard let strongSelf = self else {
                return
              }
              debugPrint(response)
            }
          case .failure(let encodingError):
            print("error:\(encodingError)")
          }
  })
}

如何发送JSON？

Answer 1

根据您提供的数据，我得出如下结论。

状态代码 400 表示 json 您传递给 api 的内容没有遵循 api 文档。例如，如果他们需要一个密钥 "name" 而你根本没有得到这样的密钥。

此错误的其他可能原因。

您似乎没有提到任何内容类型

添加这行代码以确保响应和您的请求采用正确的格式

Alamofire.request(.GET, "your url", parameters: ["foo": "bar"])
         .validate(statusCode: 200..<300)
         .validate(contentType: ["application/json"])
         .response { (_, _, _, error) in
                  println(error)
         }

The Accept header tells the server what your client wants in the response. The Content-Type header tells the server what the client sends in the request.

如果您能提供更多信息，我们可以进一步提供帮助。

Answer 2

这里我做了我的自定义webservice，你可以使用它。此网络服务用于上传带有图像和视频或两者或不带图像和视频的字典。

import Foundation
import Alamofire
class WebServiceHandler: AnyObject {

    func uploadWithAlamofire(Parameters params : [NSObject : AnyObject]?,ImageParameters imgparams :  [NSObject : AnyObject]?,VideoParameters vidoparam :  [NSObject : AnyObject]?,Action action : NSString, success: @escaping (AnyObject) -> Void, failure: @escaping (AnyObject) -> Void)
    {
        var base_url = "http://benzatineinfotech.com/webservice/finder/index.php/Web_api/"
        base_url.append(action as String)

        Alamofire.upload(multipartFormData: { multipartFormData in
            if imgparams != nil{
                for (key, value) in imgparams! {
                    if let imageData = UIImageJPEGRepresentation(value as! UIImage, 1) {
                        multipartFormData.append(imageData, withName: key as! String, fileName: "\(NSDate().timeIntervalSince1970 * 1000)).jpg", mimeType: "image/jpg")
                    }
                }
            }
            if vidoparam != nil{
                for (key, value) in vidoparam! {
                    multipartFormData.append(value as! URL , withName: key as! String, fileName: "\(NSDate().timeIntervalSince1970 * 1000).mp4", mimeType: "application/octet-stream")
                }
            }
            if params != nil
            {
                for (key, value) in params! {
                    multipartFormData.append((value as! String).data(using: .utf8)!, withName: key as! String)
                }

            } }, to: base_url, method: .post, headers: nil,
                 encodingCompletion: { encodingResult in
                    switch encodingResult {
                    case .success(let upload, _, _):
                        upload.uploadProgress { progress in
                            print(progress.fractionCompleted)
                        }
                        upload.response { [weak self] response in
                            guard self != nil else {
                                return
                            }
                            let responseString = String(data: response.data!, encoding: String.Encoding.utf8)
                            return success(responseString as AnyObject)

                        }
                    case .failure(let encodingError):
                        print("error:\(encodingError)")
                        return failure(encodingError as AnyObject)
                    }
        })
    }
    func convertToDictionary(text: String) -> [String: Any]? {
        if let data = text.data(using: .utf8) {
            do {
                return try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
            } catch {
                print(error.localizedDescription)
            }
        }
        return nil
    }
}

用法：

self.webservice.uploadWithAlamofire(Parameters: dict_params as [NSObject : AnyObject], ImageParameters: imgparam as [NSObject : AnyObject], VideoParameters:  videoparam as [NSObject : AnyObject], Action: "write_message", success: { (success) in
        print(success)
}) { (error) in
        print(error)
}

Answer 3

尝试使用此代码在单个请求中上传多个图片，此代码已在运行。

     // For Pass Valid Parameters & number of Images in Array in Image Upload Function
     var dicImgData : NSMutableDictionary? = NSMutableDictionary()

     if let img = UIImage(named: "Your Image") {
         if let data:Data = UIImagePNGRepresentation(img) {
             var imageData : NSData = data
             dicImgData! .setObject(imageData, forKey: "data" as NSCopying)
             dicImgData! .setObject("file", forKey: "name" as NSCopying)
             dicImgData! .setObject("file.png", forKey: "fileName" as NSCopying)
             dicImgData! .setObject("image/png", forKey: "type" as NSCopying)

             let dicParameter = [
                 "hometown": "yalikavak",
                 "living": "istanbul"
             ]

             self.uploadImage(url: "Your URL", Parameter: dicParameter, Images: [dicImgData])
         }
    }

上传功能

    func uploadImage (url: String, Parameter param : NSDictionary, Images arrImage: NSArray) -> Void
    {
        var requestURL : String! = url
        let headers = [
            "Authorization": "Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==",
            "Accept": "application/json",
            ]

        print("---------------------")
        print("Request URL :- \(requestURL)")
        print("---------------------")

        Alamofire.upload(multipartFormData: { (data) in

            for (key, value) in param {
                data.append((value as! String).data(using: .utf8)!, withName: key as! String)
            }

            for imageInfo in arrImage
            {
                var dicInfo : NSDictionary! = imageInfo as! NSDictionary
                data.append(dicInfo["data"] as! Data, withName: dicInfo["name"] as! String, fileName: dicInfo["fileName"] as! String, mimeType: dicInfo["type"] as! String)
                dicInfo = nil
            }

        }, to: requestURL, method: .post , headers:nil, encodingCompletion: { (encodeResult) in
            switch encodeResult {
            case .success(let upload, _, _):

                upload.responseJSON(completionHandler: { (response) in

                    switch response.result
                    {
                    case .success(let responseJSON):
                        guard let dicResponse = responseJSON as? NSDictionary else{
                            return
                        }

                        print("Response : \((dicResponse))")

                    case .failure(let error):

                        print(error)

                        break
                    }
                })
            case .failure(let error):
                print(error)
                break
            }
        })
    }

通过 Swift 3 和 Alamofire 4 使用 JSON 和自定义 headers 上传照片/文件 | iOS | Swift

Upload Photo / File with JSON and custom headers via Swift 3 and Alamofire 4 | iOS | Swift

multipart

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