无法使用 Alamofire 通过服务器上传音频文件

Question

class VoiceRecogViewController: UIViewController, AVAudioPlayerDelegate, AVAudioRecorderDelegate {


var audioPlayer: AVAudioPlayer?
var audioRecorder: AVAudioRecorder?
var error: NSError?
var soundFileURL: URL?
var soundFilePath: String = ""
var data : NSData?

@IBOutlet weak var startRocordButton: UIButton!
@IBOutlet weak var stopRecordButton: UIButton!
@IBOutlet weak var playRecordButton: UIButton!
@IBOutlet weak var continueButton: UIButton!

override func viewDidLoad() {

    super.viewDidLoad()
    playRecordButton.isEnabled = false
    stopRecordButton.isEnabled = false

    let dirPaths =
        NSSearchPathForDirectoriesInDomains(.documentDirectory,
                                            .userDomainMask, true)

    let docsDir = dirPaths[0]
    soundFilePath = (docsDir as NSString).appendingPathComponent("sound.wav")
    soundFileURL = URL(fileURLWithPath: soundFilePath)

    let recordSettings = [AVEncoderAudioQualityKey: AVAudioQuality.min.rawValue,
                          AVEncoderBitRateKey: 16,
                          AVNumberOfChannelsKey: 2,
                          AVSampleRateKey: 44100.0] as [String : Any]

    let audioSession = AVAudioSession.sharedInstance()
    try! audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord, with: [])
    try! audioSession.setActive(true)

    if let err = error {
        print("audioSession error: \(err.localizedDescription)")
    }

    do {
        audioRecorder = try AVAudioRecorder(url: soundFileURL!,
                                            settings: recordSettings as [String : AnyObject])
    } catch {
        audioRecorder = nil
    }

    audioRecorder?.prepareToRecord()

    // Do any additional setup after loading the view.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}


@IBAction func startRecord(_ sender: AnyObject) {
    if audioRecorder?.isRecording == false {
        playRecordButton.isEnabled = false
        startRocordButton.isEnabled = false
        stopRecordButton.isEnabled = true
        audioRecorder?.record()
    }
}

@IBAction func stopRecord(_ sender: AnyObject) {
    stopRecordButton.isEnabled = false
    playRecordButton.isEnabled = true
    startRocordButton.isEnabled = true

    if audioRecorder?.isRecording == true {
        audioRecorder?.stop()
    } else {
        audioPlayer?.stop()
    }
}

@IBAction func playRecord(_ sender: AnyObject) {
    if audioRecorder?.isRecording == false {
        stopRecordButton.isEnabled = true
        startRocordButton.isEnabled = false
    }

    do {
        try audioPlayer = AVAudioPlayer(contentsOf: soundFileURL!)
        audioPlayer?.delegate = self
        audioPlayer?.prepareToPlay()
        audioPlayer?.play()
    } catch {
        print("audioPlayer error")
    }
}

@IBAction func continueRegist(_ sender: AnyObject) {

    let headers: HTTPHeaders = ["Authorization": "Token ___(**token**)_____",
                                "Accept": "application/json"]

    data = NSData (contentsOf: soundFileURL!)

    let parameters: Parameters = ["from_account_id": "3",
                                  "to_account_id": "4",
                                  "file": data!,
                                 ]

    let URL = "http://leaofımjpüsmfweüdıpckfw"

            Alamofire.request(URL, method: .put, parameters: parameters, headers: headers).responseJSON { response in
                if let data = response.result.value {
                    print(data)
                }
            }
}
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
    startRocordButton.isEnabled = true
    stopRecordButton.isEnabled = false
}

func audioPlayerDecodeErrorDidOccur(_ player: AVAudioPlayer, error: Error?) {
    print("Audio Play Decode Error")
}

func audioRecorderDidFinishRecording(_ recorder: AVAudioRecorder, successfully flag: Bool) {
}

func audioRecorderEncodeErrorDidOccur(_ recorder: AVAudioRecorder, error: Error?) {
    print("Audio Record Encode Error")
}

我在上面分享了我的代码。这里的重点是将音频录制为 .wav，在应用程序中播放，在 continueRegist 部分我想用 alamofire 调用 put 方法并将音频上传到我们的 amazons3server。录制和播放音频部分完全正常。问题出在 continueRegist 方法中。调用该方法后，我得到了正确的响应，看起来很成功。然后，我从我们的 s3 服务器的 url 中检查它。音频似乎已上传，但当我下载并播放时，它无法正常工作。我无法弄清楚问题出在哪里。

另外，当我尝试从 Postman 上传并选择文件并提供正确的表单数据信息时，我可以听到上传到 s3 服务器的声音。这里可能有什么问题？

下面你可以通过 Postman 找到我的请求：

身体：

我在截屏时忘记选择文件，但它只是一个 .wav 文件。

标题

如果您不满意，请随时问我。

希望你能帮助我。

谢谢！

Answer 1

问题出在您的 Alamofire 请求中：您正在使用 JSON 中的音频数据构建 JSON。但是，您可以在 Postman 中检查请求是多部分表单数据的 HTTP 代码（右上角/下发送）。

如何实现多部分 Alamofire： 它应该类似于我不确定appendBodyPart 语句的内容。他们取决于你的情况

let audioData: NSData = ...//should be loaded from the file

Alamofire.Manager.upload(.PUT,
                          URL,
                          headers: headers,
                          multipartFormData: { multipartFormData in
                            multipartFormData.appendBodyPart(data: "3".dataUsingEncoding(NSUTF8StringEncoding), name: "from_account_id")
                            multipartFormData.appendBodyPart(data: "4".dataUsingEncoding(NSUTF8StringEncoding), name: "to_account_id")
                            multipartFormData.appendBodyPart(data: audioData, name: "file", fileName: "file", mimeType: "application/octet-stream")
                            },
                          encodingCompletion: { encodingResult in
                            switch encodingResult {

                            case .Success(let upload, _, _):
                                upload.responseJSON { response in

                                }

                            case .Failure(let encodingError):
                                // Error while encoding request:
                            }
})

Answer 2

以下是上传音频文件的代码：

let uploadAudioURL = "http://<your post API url>"



    let header : [String:String] = [
        "Authorization" : "<your authorisation token>"
    ]

    let voiceData = try? Data(contentsOf: <url of audio file to upload>)


    let params : [String:String] = [
        "length" : "39000",
        "title" : "Trying to upload",
    ]

    Alamofire.upload(
        multipartFormData: { (multipartFormData) in
            multipartFormData.append(voiceData!, withName: "voice", fileName: "TempRecordedAudioFile", mimeType: "audio/m4a")
            for (key, value) in params {
                multipartFormData.append(value.data(using: String.Encoding.utf8)!, withName: key)
            }
    },
        usingThreshold : SessionManager.multipartFormDataEncodingMemoryThreshold,
        to : uploadAudioURL,
        method: .post,
        headers: header){ (result) in

            switch result {
            case .success(let upload, _, _):

                upload.uploadProgress(closure: { (Progress) in
                    print("Upload Progress: \(Progress.fractionCompleted)")
                })

                upload.responseJSON { response in

                    if let JSON = response.result.value {
                        print("Response : ",JSON)

                    }
                }

            case .failure(let encodingError):
                print(encodingError)
            }

    }

希望它会有所帮助。

使用上述代码sn-p的一些注意事项：

1. 确保提供上传 URL
2. 添加所需的授权标头详细信息。
3. 在 Alamofire.upload 语句中确保 withName 设置为您的上传 API 参数名称。我用了voice，你可能有不同的参数名称。
4. upload.uploadProgress() 是可选的。如果不需要，可以将其删除。