使用 Response: : Download 在 laravel 中下载文件

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最佳答案

Try this.

public function getDownload()
{
//PDF file is stored under project/public/download/info.pdf
$file= public_path(). "/download/info.pdf";


$headers = array(
'Content-Type: application/pdf',
);


return Response::download($file, 'filename.pdf', $headers);
}

"./download/info.pdf"will not work as you have to give full physical path.

Update 20/05/2016

Laravel 5, 5.1, 5.2 or 5.* users can use the following method instead of Response facade. However, my previous answer will work for both Laravel 4 or 5. (the $header array structure change to associative array =>- the colon after 'Content-Type' was deleted - if we don't do those changes then headers will be added in wrong way: the name of header wil be number started from 0,1,...)

$headers = [
'Content-Type' => 'application/pdf',
];


return response()->download($file, 'filename.pdf', $headers);

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In the accepted answer, for Laravel 4 the headers array is constructed incorrectly. Use:

$headers = array(
'Content-Type' => 'application/pdf',
);

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While using laravel 5 use this code as you don`t need headers.

return response()->download($pathToFile); .

If you are using Fileentry you can use below function for downloading.

// download file
public function download($fileId){
$entry = Fileentry::where('file_id', '=', $fileId)->firstOrFail();
$pathToFile=storage_path()."/app/".$entry->filename;
return response()->download($pathToFile);
}

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File downloads are super simple in Laravel 5.

As @Ashwani mentioned Laravel 5 allows file downloads with response()->download() to return file for download. We no longer need to mess with any headers. To return a file we simply:

return response()->download(public_path('file_path/from_public_dir.pdf'));

from within the controller.

Reusable Download Route/Controller

Now let's make a reusable file download route and controller so we can server up any file in our public/files directory.

Create the controller:

php artisan make:controller --plain DownloadsController

Create the route in app/Http/routes.php:

Route::get('/download/{file}', 'DownloadsController@download');

Make download method in app/Http/Controllers/DownloadsController:

class DownloadsController extends Controller
{
public function download($file_name) {
$file_path = public_path('files/'.$file_name);
return response()->download($file_path);
}
}

Now simply drops some files in the public/files directory and you can server them up by linking to /download/filename.ext:

<a href="/download/filename.ext">File Name</a> // update to your own "filename.ext"

If you pulled in Laravel Collective's Html package you can use the Html facade:

{!! Html::link('download/filename.ext', 'File Name') !!}

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// Try this to download any file. laravel 5.*

// you need to use facade "use Illuminate\Http\Response;"

public function getDownload()
{


//PDF file is stored under project/public/download/info.pdf


$file= public_path(). "/download/info.pdf";


return response()->download($file);
}

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Quite a few of these solutions suggest referencing the public_path() of the Laravel application in order to locate the file. Sometimes you'll want to control access to the file or offer real-time monitoring of the file. In this case, you'll want to keep the directory private and limit access by a method in a controller class. The following method should help with this:

public function show(Request $request, File $file) {


// Perform validation/authentication/auditing logic on the request


// Fire off any events or notifiations (if applicable)


return response()->download(storage_path('app/' . $file->location));
}

There are other paths that you could use as well, described on Laravel's helper functions documentation

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I think that you can use

$file= public_path(). "/download/info.pdf";


$headers = array(
'Content-Type: ' . mime_content_type( $file ),
);

With this you be sure that is a pdf.

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This is html part

 <a href="\{\{route('download',$details->report_id)}}" type="button" class="btn btn-primary download" data-report_id="\{\{$details->report_id}}" >Download</a>

This is Route :

Route::get('/download/{id}', 'users\UserController@getDownload')->name('download')->middleware('auth');

This is function :

public function getDownload(Request $request,$id)
{
$file= public_path(). "/pdf/";  //path of your directory
$headers = array(
'Content-Type: application/pdf',
);
return Response::download($file.$pdfName, 'filename.pdf', $headers);
}

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If you want to use the JavaScript download functionality then you can also do

 <a onclick="window.open('info.pdf) class="btn btn-large pull-right"><i class="icon-download-alt"> </i> Download Brochure </a>

Also remember to paste the info.pdf file in your public directory of your project

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you can use simply inside your controller: return response()->download($filePath); Happy coding :)

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 HTML link click
<a class="download" href="\{\{route('project.download',$post->id)}}">DOWNLOAD</a>




// Route


Route::group(['middleware'=>['auth']], function(){
Route::get('file-download/{id}', 'PostController@downloadproject')->name('project.download');
});


public function downloadproject($id) {


$book_cover = Post::where('id', $id)->firstOrFail();
$path = public_path(). '/storage/uploads/zip/'. $book_cover->zip;
return response()->download($path, $book_cover
->original_filename, ['Content-Type' => $book_cover->mime]);


}

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HTML href link click:

<a ="\{\{ route('download',$name->file) }}"> Download  </a>

In controller:

public function download($file){
$file_path = public_path('uploads/cv/'.$file);
return response()->download( $file_path);
}

In route:

Route::get('/download/{file}','Controller@download')->name('download');