Alamofire：文件下载和验证失败 [英] Alamofire: file download and validation failure

问题描述

在我的iOS项目中，我正在使用 Alamofire 库以这种方式（从具有Basic Auth的服务器上）下载远程文档：

 放置目标位置：DownloadRequest.DownloadFileDestination = {_，
中的_让documentsURL = FileManager.default.urls（for：.documentDirectory，in：.userDomainMask ）[0] 
让fileURL = documentsURL.appendingPathComponent（ foo.pdf）
返回（filePath.url，[.removePreviousFile，.createIntermediateDirectories]）
} 
 
 Alamofire.download（myUrlRequest，to：destination）.authenticate（user：user，password：password，persistence：.none）.validate（）。response {响应
打印（response）
 if response.error == nil，让path = response.destinationURL？.path {
 print（path）
} 
} 
  

这很好用！该文件已正确下载到应用程序的Documents文件夹中。

我的问题是当 user 或/和密码错误。在这种情况下，服务器响应状态为 401未经授权和 .validate（）方法正确失败，但是在我的Documents文件夹中找到文件 foo.pdf，其中的内容是解释 401 错误的xml。我想要的是仅在验证没有失败的情况下保存文件。

我的问题：Alamofire是否有办法保存文件以防万一响应得到验证？还是在验证失败时必须手动删除文件？

解决方案

我现在遇到类似的问题。到目前为止，我唯一能想到的就是粗糙的

  if response.error！= nil {
试试吗？ FileManager.default.removeItem（at：destinationURL）
} 
  

。 p>

我将进一步调查。

编辑1：

似乎很早以前这个问题带来了这种行为 https://github.com/Alamofire / Alamofire / issues / 233

In my iOS project I'm using Alamofire library to download remote documents (from a server with Basic Auth) in this way:

let destination: DownloadRequest.DownloadFileDestination = { _, _ in
    let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
    let fileURL = documentsURL.appendingPathComponent("foo.pdf")
    return (filePath.url, [.removePreviousFile, .createIntermediateDirectories])
}

Alamofire.download(myUrlRequest, to: destination).authenticate(user: user, password: password, persistence: .none).validate().response { response in
    print(response)
    if response.error == nil, let path = response.destinationURL?.path {
        print(path)
    }
}

This works great! The file is correctly downloaded in the app's Documents folder.

My problem is when user or/and password are wrong. In this case server response status is 401 Unauthorized and .validate() method correctly fails, but in my Documents folder I find the file "foo.pdf" where the content is a xml that explains the 401 error. What I would like is the file saved only if the validate doesn't fail.

My questions: is there a way, with Alamofire, to save the file just in case the response is validated? Or do I have to manually delete the file when validate fails?

解决方案

I am having the similar issue at the moment. So far, the only thing I could think of is crude

if response.error != nil {
    try? FileManager.default.removeItem(at: destinationURL)
}

in response closure.

I will investigate further though.

EDIT 1:

It seems this issue quite some time ago brought this behaviour https://github.com/Alamofire/Alamofire/issues/233

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