Laravel - 文件下载
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Laravel - File Downloads
提问by NSaid
Hi I'm trying to fix a Laravel download bug I am dealing with. I have the correct route setup, and correct function in the controller. I also am able to confirm that I have access to the file because I created a file using the exact same route and returned it. By doing this I was able to successfully return the contents of the file. However when I try and use a button from the view and call the controller function I get this error:
嗨，我正在尝试修复我正在处理的 Laravel 下载错误。我的路线设置正确，控制器功能正确。我还能够确认我有权访问该文件，因为我使用完全相同的路径创建了一个文件并将其返回。通过这样做，我能够成功返回文件的内容。但是，当我尝试使用视图中的按钮并调用控制器函数时，我收到此错误：
FileNotFoundException in File.php line 37:
The file "The file "2016-04-04_07-21-50 - Pinging host: 192.168.2.1
2016-04-04_07-21-50 - Host 192.168.2.1 is up!
2016-04-04_07-21-50 - Pinging host: 192.168.2.2
2016-04-04_07-21-53 - Pinging host: 192.168.2.3 ...
Now here is the code that resulted in this error:
现在这是导致此错误的代码：
show.blade.php
show.blade.php
<a class="btn btn-default col-md-12" href="/getDownload/{{ $now }}" role="button">Download Today's Log</a>
HonoursController.php
荣誉控制器.php
public function getDownload($id)
{
$file = File::get("../resources/logs/$id");
$headers = array(
'Content-Type: application/octet-stream',
);
#return Response::download($file, $id. '.' .$type, $headers);
return response()->download($file, $id.'txt', $headers);
}
What I have been able to surmise is that I am getting a 500 HTTP error. My inspection does not provide me with any other information however. Any idea what is going on?
我能够推测的是，我收到了 500 HTTP 错误。然而，我的检查没有为我提供任何其他信息。知道发生了什么吗？
采纳答案by nick.graziano
Try this:
尝试这个：
public function getDownload($id)
{
// $file = File::get("../resources/logs/$id");
$headers = array(
'Content-Type: application/octet-stream',
);
#return Response::download($file, $id. '.' .$type, $headers);
return response()->download("../resources/logs/$id", $id.'txt', $headers);
}
From the docs:
从文档：
The download method may be used to generate a response that forces the user's browser to download the file at the given path.
return response()->download($pathToFile, $name, $headers);
download 方法可用于生成响应，强制用户的浏览器在给定路径下载文件。
返回响应()->下载($pathToFile, $name, $headers);
回答by jakub_jo
The first argument of the download method should be a path to the file, not the file itself.
下载方法的第一个参数应该是文件的路径，而不是文件本身。
The download method may be used to generate a response that forces the user's browser to download the file at the given path. ...
Source: https://laravel.com/docs/5.2/responses#file-downloads
download 方法可用于生成响应，强制用户的浏览器在给定路径下载文件。...
回答by Ramesh KC
Follow these two steps:
请按照以下两个步骤操作：
- Find the details of the file by using the Model.
- Use Laravel Response to download file with the help of headers.
- 使用模型查找文件的详细信息。
- 使用 Laravel Response 在标头的帮助下下载文件。
Here Blog is the model and $id is the primary key which indicates file. Our table's column name where file name has been stored is cover_image, so $file_name=$blog->cover_image;provides us the file name. Let's assume our file is present in upload/images/ of public folder of Laravel.
这里Blog是model，$id是主键，表示文件。我们表中存储文件名的列名是cover_image，所以$file_name=$blog->cover_image; 为我们提供文件名。假设我们的文件存在于 Laravel 公共文件夹的 upload/images/ 中。
Controller
控制器
`public function download(Blog $blog,$id){
$blog=$blog->find($id);
$headers = array(
'Content-Type: application/octet-stream',
);
$pathToFile=public_path('upload/images/');
$file_name=$blog->cover_image;
$download_name='Download-'.$file_name;
return response()->download($pathToFile.$file_name, $download_name, $headers);
}`
Route
路线
`Route::get('{id}/file-download',['as'=>'file-download','uses'=>'BlogsController@download']); `
View
看法
Here, ['id'=>1] indicates we are going to download file having primary key as 1. If you want to download another just change with any n integer number.
这里，['id'=>1] 表示我们要下载主键为 1 的文件。如果你想下载另一个，只需更改任意 n 个整数即可。
`<a class="btn btn-primary" href="{{ route('file-download',['id'=>1]) }}">Download</a>
`
`
