ios - 在 Hapijs 后端处理 Alamofire 在 Swift 中发送的多部分/表单数据请求

Question

我正在使用 swift 创建图像和视频上传 iOS 应用程序。我正在使用 Alamofire 库进行网络请求。下面是用户选择图片时快速运行的代码

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    dismissViewControllerAnimated(true, completion: nil)
    guard let image = info[UIImagePickerControllerOriginalImage] as? UIImage else {
            print("Did not get required image")
            return
    }

    guard let imageData = UIImageJPEGRepresentation(image, 0.8) else {
        return
    }

    Alamofire.upload(.POST, "http://localhost:8101/upload_request", multipartFormData: {
        multipartFormData in
        multipartFormData.appendBodyPart(data: imageData, name: "image")
    }, encodingCompletion: {
        encodingResult in
        switch encodingResult {
        case .Success(let upload, _, _):
            upload.responseJSON(completionHandler: {
                response in
                debugPrint(response)
            })
        case .Failure(let encodingError):
            print(encodingError)
        }
    })
}

下面是Hapijs处理请求的方式

server.route({
  method: 'POST',
  path: '/upload_request',
  config: {
    payload: {
      maxBytes: 10 * 1024 * 1024,
      output: 'stream',
      parse: true,
      allow: 'multipart/form-data'
    }
  },
  handler: (request, reply) => {
      var data = request.payload;
      if (data.image) {
        var filePath = 'new_image.jpg';
        // data.image has data but is not of Stream.Readable

      } else {
        console.log('No data file');
      }
    }
});

问题是我没有在后端获取 request.payload.image 作为流，所以我无法创建 writeStream 并将其通过管道传输到 writeStream。我做错了什么，还是遗漏了什么？我应该怎么做才能读取数据并将其作为图像文件写入文件系统？

这是我在 request.payload.image 中获取的数据的开始

����JFIFHH��LExifMM*�i&��� ��8Photoshop 3.08BIM8BIM%��ُ���      ���B~��@ICC_PROFILE0ADBEmntrRGB XYZ �3;acspAPPLnone���-ADBE
cprt�2desc0kwtpt�bkpt�rTRC�gTRC�bTRC�rXYZ�gXYZbXYZtextCopyright 2000 Adobe Systems IncorporateddescAdobe RGB (1998)XYZ �Q�XYZ curv3curv3curv3XYZ �O��XYZ 4��,�XYZ &1/���� �"��  

Answer 1

我找到了答案。只需要一个小的改变。我没有在 Hapi.js 端获得所需格式的数据的原因是我没有从 Alamofire 正确发送它。

这是从 Alamofire 发送请求的方式

Alamofire.upload(
  .POST,
  "http://localhost:8101/upload_request",
  multipartFormData: { multipartFormData in
      multipartFormData.appendBodyPart(data: self.fileData, name: "image", fileName: "imageToUpload.jpg",
        mimeType: "image/jpeg")
    },
  encodingCompletion: { encodingResult in
    switch encodingResult {
    case .Success(let upload, _, _):
      upload.responseJSON(completionHandler: { response in
        debugPrint(response)
      })
    case .Failure(let encodingError):
      print(encodingError)
    }
})

以及它应该在后端处理的方式。只需确保您正在写入的目录已创建。

server.route({
path: '/upload_request',
method: 'POST',
config: {
    payload: {
        maxBytes: 20 * 1024 * 1024,
        output: 'stream',
        parse: true,
        allow: 'multipart/form-data'
    }
},
handler: (request, reply) => {
    var data = request.payload;
    if (data.image) {
        var name = data.image.hapi.filename;
        var path = __dirname + "/uploads/" + name;
        var file = fs.createWriteStream(path);

        file.on('error', (err) => {
            console.error(err);
        });

        file.on('open', (err) => {
            data.image.pipe(file);    
        });            

        data.image.on('end', (err) => {
            var ret = {
                filename: data.image.hapi.filename,
                headers: data.image.hapi.headers
            }
            reply(ret);
        })
    }
}
});