我们可以在 Alamofire 文件下载中添加自定义标头吗：IOS/SWIFT

Question

我知道如何向 alamofire 请求添加自定义标头，但是是否可以向 alamofire 下载添加自定义标头？另外，如何更改保存在文件路径中的文件扩展名？

Alamofire.download(.GET, myURL, { (temporaryURL, response) in
      if let directoryURL = NSFileManager.defaultManager()
        .URLsForDirectory(.DocumentDirectory,
          inDomains: .UserDomainMask)[0]
        as? NSURL {
          let pathComponent = response.suggestedFilename

          return directoryURL.URLByAppendingPathComponent(pathComponent!)
      }
      return temporaryURL
    }).response{ (_,_, data, err) -> Void in
      println(data)
    }

Answer 1

这是一个与您的代码示例相匹配的代码示例，使用 @mattt 的建议，即使用已附加标头的 NSURLRequest。

let URLString = "whatever/floats/your/boat"
let URLRequest = NSMutableURLRequest(URL: NSURL(string: URLString)!)
URLRequest.setValue("Header Value", forHTTPHeaderField: "Header Name")

let request = Alamofire.download(URLRequest) { temporaryURL, response in
    let fileManager = NSFileManager.defaultManager()

    if let directoryURL = fileManager.URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)[0] as? NSURL {
        let pathComponent = response.suggestedFilename
        return directoryURL.URLByAppendingPathComponent(pathComponent!)
    }

    return temporaryURL
}

request.response { _, response, data, error in
    if let data = data as? NSData {
        println(NSString(data: data, encoding: NSUTF8StringEncoding))
    } else {
        println(response)
        println(error)
    }
}

Answer 2

我找到了解决方案。

var headers = Alamofire.Manager.sharedInstance.session.configuration.HTTPAdditionalHeaders ?? [:]
    headers = [ "X-ApiKey" : "someValue",
      "Content-Type" : "application/json; charset=utf-8"]

    let configuration = NSURLSessionConfiguration.defaultSessionConfiguration()
    configuration.HTTPAdditionalHeaders = headers

    let manager = Alamofire.Manager(configuration: configuration)
    let destination = Alamofire.Request.suggestedDownloadDestination(directory: .DocumentDirectory, domain: .UserDomainMask)
    manager.download(.GET, "place your URL here", destination: destination)
      .progress { (bytesRead, totalBytesRead, totalBytesExpectedToRead) in
        println(totalBytesRead)
      }
      .response { (request, response, data, error) in
        fileName = response?.suggestedFilename
        completionHandler(fileName: fileName as String?, error: error)
        println(data)
    }

希望这对某人有所帮助。谢谢