Routes API send content-type: xml add 4 spaces at top level of the response

[diogo-vf]

Laravel Version

11.0 and 11.25

PHP Version

8.2.22

Database Driver & Version

No response

Description

After calling my custom api route and asking an xml response, it return every time at the first line 4 spaces following by a \n.

During my tests, I use the followin XML: https://learn.microsoft.com/en-us/previous-versions/windows/desktop/ms762271(v=vs.85)

the code in the API route file:

Route::any('exports/{channel}/{type?}', fn () => response(
    content:$content,
    code: 200, headers: [
    'Content-Type' => 'application/xml',
]))->name('exports');

The answer:

    
<?xml version="1.0"?>
<catalog>
    <book id="bk101">
        <author>Gambardella, Matthew</author>
        <title>XML Developer's Guide</title>
        <genre>Computer</genre>
        <price>44.95</price>
        <publish_date>2000-10-01</publish_date>
        <description>An in-depth look at creating applications
      with XML.</description>
    </book>
    [...]
</catalog>

But when I remove the header Content-Type, the first line is correctly <?xml version="1.0"?>, but the Content-Type is text/html; charset=UTF-8.

Steps To Reproduce

Add the following route in the routes/api.php file:

Route::any('exports/{channel}/{type?}', fn () => response(
    content:<<<'XML'
<?xml version="1.0"?>
<catalog>
   <book id="bk101">
      <author>Gambardella, Matthew</author>
      <title>XML Developer's Guide</title>
      <genre>Computer</genre>
      <price>44.95</price>
      <publish_date>2000-10-01</publish_date>
      <description>An in-depth look at creating applications
      with XML.</description>
   </book>
   <book id="bk102">
      <author>Ralls, Kim</author>
      <title>Midnight Rain</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2000-12-16</publish_date>
      <description>A former architect battles corporate zombies,
      an evil sorceress, and her own childhood to become queen
      of the world.</description>
   </book>
   <book id="bk103">
      <author>Corets, Eva</author>
      <title>Maeve Ascendant</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2000-11-17</publish_date>
      <description>After the collapse of a nanotechnology
      society in England, the young survivors lay the
      foundation for a new society.</description>
   </book>
   <book id="bk104">
      <author>Corets, Eva</author>
      <title>Oberon's Legacy</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2001-03-10</publish_date>
      <description>In post-apocalypse England, the mysterious
      agent known only as Oberon helps to create a new life
      for the inhabitants of London. Sequel to Maeve
      Ascendant.</description>
   </book>
   <book id="bk105">
      <author>Corets, Eva</author>
      <title>The Sundered Grail</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2001-09-10</publish_date>
      <description>The two daughters of Maeve, half-sisters,
      battle one another for control of England. Sequel to
      Oberon's Legacy.</description>
   </book>
   <book id="bk106">
      <author>Randall, Cynthia</author>
      <title>Lover Birds</title>
      <genre>Romance</genre>
      <price>4.95</price>
      <publish_date>2000-09-02</publish_date>
      <description>When Carla meets Paul at an ornithology
      conference, tempers fly as feathers get ruffled.</description>
   </book>
   <book id="bk107">
      <author>Thurman, Paula</author>
      <title>Splish Splash</title>
      <genre>Romance</genre>
      <price>4.95</price>
      <publish_date>2000-11-02</publish_date>
      <description>A deep sea diver finds true love twenty
      thousand leagues beneath the sea.</description>
   </book>
   <book id="bk108">
      <author>Knorr, Stefan</author>
      <title>Creepy Crawlies</title>
      <genre>Horror</genre>
      <price>4.95</price>
      <publish_date>2000-12-06</publish_date>
      <description>An anthology of horror stories about roaches,
      centipedes, scorpions  and other insects.</description>
   </book>
   <book id="bk109">
      <author>Kress, Peter</author>
      <title>Paradox Lost</title>
      <genre>Science Fiction</genre>
      <price>6.95</price>
      <publish_date>2000-11-02</publish_date>
      <description>After an inadvertant trip through a Heisenberg
      Uncertainty Device, James Salway discovers the problems
      of being quantum.</description>
   </book>
   <book id="bk110">
      <author>O'Brien, Tim</author>
      <title>Microsoft .NET: The Programming Bible</title>
      <genre>Computer</genre>
      <price>36.95</price>
      <publish_date>2000-12-09</publish_date>
      <description>Microsoft's .NET initiative is explored in
      detail in this deep programmer's reference.</description>
   </book>
   <book id="bk111">
      <author>O'Brien, Tim</author>
      <title>MSXML3: A Comprehensive Guide</title>
      <genre>Computer</genre>
      <price>36.95</price>
      <publish_date>2000-12-01</publish_date>
      <description>The Microsoft MSXML3 parser is covered in
      detail, with attention to XML DOM interfaces, XSLT processing,
      SAX and more.</description>
   </book>
   <book id="bk112">
      <author>Galos, Mike</author>
      <title>Visual Studio 7: A Comprehensive Guide</title>
      <genre>Computer</genre>
      <price>49.95</price>
      <publish_date>2001-04-16</publish_date>
      <description>Microsoft Visual Studio 7 is explored in depth,
      looking at how Visual Basic, Visual C++, C#, and ASP+ are
      integrated into a comprehensive development
      environment.</description>
   </book>
</catalog>
XML,
    code: 200, headers: [
    'Content-Type' => 'application/xml',
]))->name('exports');

Call backend.laravel.vm/api/exports/demo and you're result should be:

    
<?xml version="1.0"?>
<catalog>
    <book id="bk101">
        <author>Gambardella, Matthew</author>
        <title>XML Developer's Guide</title>
        <genre>Computer</genre>
        <price>44.95</price>
        <publish_date>2000-10-01</publish_date>
        <description>An in-depth look at creating applications
      with XML.</description>
    </book>
    <book id="bk102">
        <author>Ralls, Kim</author>
        <title>Midnight Rain</title>
        <genre>Fantasy</genre>
        <price>5.95</price>
        <publish_date>2000-12-16</publish_date>
        <description>A former architect battles corporate zombies,
      an evil sorceress, and her own childhood to become queen
      of the world.</description>
    </book>
    <book id="bk103">
        <author>Corets, Eva</author>
        <title>Maeve Ascendant</title>
        <genre>Fantasy</genre>
        <price>5.95</price>
        <publish_date>2000-11-17</publish_date>
        <description>After the collapse of a nanotechnology
      society in England, the young survivors lay the
      foundation for a new society.</description>
    </book>
    <book id="bk104">
        <author>Corets, Eva</author>
        <title>Oberon's Legacy</title>
        <genre>Fantasy</genre>
        <price>5.95</price>
        <publish_date>2001-03-10</publish_date>
        <description>In post-apocalypse England, the mysterious
      agent known only as Oberon helps to create a new life
      for the inhabitants of London. Sequel to Maeve
      Ascendant.</description>
    </book>
    <book id="bk105">
        <author>Corets, Eva</author>
        <title>The Sundered Grail</title>
        <genre>Fantasy</genre>
        <price>5.95</price>
        <publish_date>2001-09-10</publish_date>
        <description>The two daughters of Maeve, half-sisters,
      battle one another for control of England. Sequel to
      Oberon's Legacy.</description>
    </book>
    <book id="bk106">
        <author>Randall, Cynthia</author>
        <title>Lover Birds</title>
        <genre>Romance</genre>
        <price>4.95</price>
        <publish_date>2000-09-02</publish_date>
        <description>When Carla meets Paul at an ornithology
      conference, tempers fly as feathers get ruffled.</description>
    </book>
    <book id="bk107">
        <author>Thurman, Paula</author>
        <title>Splish Splash</title>
        <genre>Romance</genre>
        <price>4.95</price>
        <publish_date>2000-11-02</publish_date>
        <description>A deep sea diver finds true love twenty
      thousand leagues beneath the sea.</description>
    </book>
    <book id="bk108">
        <author>Knorr, Stefan</author>
        <title>Creepy Crawlies</title>
        <genre>Horror</genre>
        <price>4.95</price>
        <publish_date>2000-12-06</publish_date>
        <description>An anthology of horror stories about roaches,
      centipedes, scorpions  and other insects.</description>
    </book>
    <book id="bk109">
        <author>Kress, Peter</author>
        <title>Paradox Lost</title>
        <genre>Science Fiction</genre>
        <price>6.95</price>
        <publish_date>2000-11-02</publish_date>
        <description>After an inadvertant trip through a Heisenberg
      Uncertainty Device, James Salway discovers the problems
      of being quantum.</description>
    </book>
    <book id="bk110">
        <author>O'Brien, Tim</author>
        <title>Microsoft .NET: The Programming Bible</title>
        <genre>Computer</genre>
        <price>36.95</price>
        <publish_date>2000-12-09</publish_date>
        <description>Microsoft's .NET initiative is explored in
      detail in this deep programmer's reference.</description>
    </book>
    <book id="bk111">
        <author>O'Brien, Tim</author>
        <title>MSXML3: A Comprehensive Guide</title>
        <genre>Computer</genre>
        <price>36.95</price>
        <publish_date>2000-12-01</publish_date>
        <description>The Microsoft MSXML3 parser is covered in
      detail, with attention to XML DOM interfaces, XSLT processing,
      SAX and more.</description>
    </book>
    <book id="bk112">
        <author>Galos, Mike</author>
        <title>Visual Studio 7: A Comprehensive Guide</title>
        <genre>Computer</genre>
        <price>49.95</price>
        <publish_date>2001-04-16</publish_date>
        <description>Microsoft Visual Studio 7 is explored in depth,
      looking at how Visual Basic, Visual C++, C#, and ASP+ are
      integrated into a comprehensive development
      environment.</description>
    </book>
</catalog>

[vjaykoogu]

@diogo-vf are you sure above code works for you ? i had to make few changes to run it locally. I don't see any spaces.

Route::any('exports/{channel}/{type?}', function ($channel, $type = null) {
    $content = <<<XML
<?xml version="1.0"?>
<catalog>
   <!-- Your XML content goes here -->
</catalog>
XML;

    return response($content, 200)
        ->header('Content-Type', 'application/xml');
})->name('exports');

[diogo-vf]

@vjaykoogu Hi,

I have 'auth:sactum' middleware at the top level of my api.php, but the rest is the same.

Route::middleware(['auth:sanctum'])
    ->group(function () {
        Route::any('exports/{channel}/{type?}', `myCallback` )->name('exports');
        Route::post( [...] );
        [...]
    });

[vjaykoogu]

@diogo-vf could you please try in different browser?, This is what i see on my machine.

[diogo-vf]

that's my case

Removing the Content-Type works:

[vjaykoogu]

@diogo-vf Forgot to add Safari Result, I dint make any changes i can see the same on safari too. (my previous screenshot is from Brave browser)

[diogo-vf]

I use Firefox as my main browser

But i can't understand why in your case, you don't have 4spaces when calling the "export"

[diogo-vf]

I tried with chrome and have also the 4 spaces problem.

I've also comment all my routes in my api.php and move

Route::any('exports/{channel}/{type?}', function ($channel, $type = null) {
    $content = <<<XML
<?xml version="1.0"?>
<catalog>
   <!-- Your XML content goes here -->
</catalog>
XML;

    return response($content, 200)
        ->header('Content-Type', 'application/xml');
})->name('exports');

to first line and same result, always 4 spaces 🫤at the beginning of the xml result

[diogo-vf]

To bypass the problem, when I run php artisan optimize it fix the problem.