blocks|key|981586|text|从GitHub中可以看到，asset方法正在调用getScheme来确定方案应该是什么。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|981587|https://github.com/illuminate/routing/blob/master/UrlGenerator.php#L303|981588|public+function+formatScheme($secure+=+null)
{
++++if+(!+is_null($secure))+{
++++++++return+$secure+?+'https://'+:+'http://';
++++}
++++if+(is_null($this->cachedScheme))+{
++++++++$this->cachedScheme+=+$this->forceScheme+?:+$this->request->getScheme().'://';
++++}
++++return+$this->cachedScheme;
}|code-block|syntax|javascript|981589|因此，如果您不提供asset第二个参数$secure，那么它将使用请求方案。否则，您可以提供$secure来强制执行所需的方案，而不管请求中的方案是什么。|981590|如果您查看代码，您将看到，如果$secure为null且没有设置缓存，则缓存将设置为请求方案(即$this->request->getScheme())，并因此返回。|981591|entityMap|0|LINK|mutability|MUTABLE|url^0|D|5|O|9|0|0|1Z|0|0|0|9|5|J|7|1A|7|0|F|7|1C|R|0^^$0|@$1|2|3|4|5|6|7|X|8|@$9|Y|A|Z|B|C]|$9|10|A|11|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|12|8|@]|D|@$9|13|A|14|1|15]]|E|$]]|$1|H|3|I|5|J|7|16|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|17|8|@$9|18|A|19|B|C]|$9|1A|A|1B|B|C]|$9|1C|A|1D|B|C]]|D|@]|E|$]]|$1|O|3|P|5|6|7|1E|8|@$9|1F|A|1G|B|C]|$9|1H|A|1I|B|C]]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|1J|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|G]]]]

As you can see from GitHub the <code>asset</code> method is calling <code>getScheme</code> to determine what the scheme should be.

<a href="https://github.com/illuminate/routing/blob/master/UrlGenerator.php#L303" rel="nofollow noreferrer">https://github.com/illuminate/routing/blob/master/UrlGenerator.php#L303</a>

<pre><code>public function formatScheme($secure = null)
{
 if (! is_null($secure)) {
 return $secure ? 'https://' : 'http://';
 }
 if (is_null($this-&gt;cachedScheme)) {
 $this-&gt;cachedScheme = $this-&gt;forceScheme ?: $this-&gt;request-&gt;getScheme().'://';
 }
 return $this-&gt;cachedScheme;
}
</code></pre>

So if you don't provide the <code>asset</code> 2nd parameter <code>$secure</code> then it uses the request scheme. Otherwise you can provide <code>$secure</code> to force the desired scheme regardless of what is the scheme in the request.

If you look at the code you'll see that if <code>$secure</code> is null and no cache is set than the cache is set to the request scheme (i.e. <code>$this-&gt;request-&gt;getScheme()</code>) and therefore returned.

blocks|key|981673|text|请停止为已经存在的事情编写代码。有一个ASSET_URL+env变量。使用它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|981674|ASSET_URL=https://your.app.url+#in+env+for+production

ASSET_URL=http://your.app.url+#in+env+for+local+development|code-block|syntax|javascript|981675|(+https://stackoverflow.com/a/68287406/7481663+)|offset|length|981676|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/68287406/7481663^0|0|0|2|18|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Please stop writing code for doing things that already exist.
There is a ASSET_URL env variable. Use it.
<pre><code>ASSET_URL=https://your.app.url #in env for production

ASSET_URL=http://your.app.url #in env for local development
</code></pre>
( <a href="https://stackoverflow.com/a/68287406/7481663">https://stackoverflow.com/a/68287406/7481663</a> )

blocks|key|787118|text|你不是在找secure_asset吗？|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|787119|https://laravel.com/docs/5.3/helpers#method-secure-asset|787120|entityMap|0|LINK|mutability|MUTABLE|url^0|5|C|0|0|1K|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@]|D|@$9|S|A|T|1|U]]|E|$]]|$1|H|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|G]]]]

isn't it <code>secure_asset</code> you're looking for?

<a href="https://laravel.com/docs/5.3/helpers#method-secure-asset" rel="nofollow noreferrer">https://laravel.com/docs/5.3/helpers#method-secure-asset</a>

blocks|key|787157|text|在同一个文件中，您有一个getScheme()方法的定义，该方法使用$secure参数。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|787158|如果$secure参数是默认的null值，则可以从当前方案中猜测该方案，也可以从以前保存的方案中检索该方案(如果没有使用forceSchema()强制)。|offset|length|style|CODE|787159|您可以告诉$secure参数是这样工作的：|787160|true将强制https|unordered-list-item|787161|false将强制http|787162|null将使用从当前方案中猜测的最佳方案。|787163|下面是getScheme()方法的代码：|787164|protected+function+getScheme($secure)
{
++++if+(is_null($secure))+{
++++++++if+(is_null($this->cachedSchema))+{
++++++++++++$this->cachedSchema+=+$this->forceSchema+?:+$this->request->getScheme().'://';
++++++++}
++++++++return+$this->cachedSchema;
++++}
++++return+$secure+?+'https://'+:+'http://';
}|code-block|syntax|javascript|787165|entityMap^0|0|F|4|0|0|0|4|0|0|5|0|0|4|0|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|10|8|@$D|11|E|12|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|13|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|14|8|@$D|15|E|16|F|G]]|9|@]|A|$]]|$1|M|3|N|5|L|7|17|8|@$D|18|E|19|F|G]]|9|@]|A|$]]|$1|O|3|P|5|L|7|1A|8|@$D|1B|E|1C|F|G]]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1D|8|@]|9|@]|A|$]]|$1|S|3|T|5|U|7|1E|8|@]|9|@]|A|$V|W]]|$1|X|3|-4|5|6|7|1F|8|@]|9|@]|A|$]]]|Y|$]]

On the very same file, you have a definition of the getScheme() method, which uses the $secure parameter.

If the $secure parameter is the default <code>null</code> value, the scheme is either guessed from the current scheme, or retrieved from the previous saved scheme (If it hasn't been forced with forceSchema()).

You could tell the $secure parameter works that way :

<ul>
<li><code>true</code> will force https</li>
<li><code>false</code> will force http</li>
<li><code>null</code> will use the best scheme, guessed from the current scheme</li>
</ul>

Here's the code from the getScheme() method :

<pre><code>protected function getScheme($secure)
{
 if (is_null($secure)) {
 if (is_null($this-&gt;cachedSchema)) {
 $this-&gt;cachedSchema = $this-&gt;forceSchema ?: $this-&gt;request-&gt;getScheme().'://';
 }
 return $this-&gt;cachedSchema;
 }
 return $secure ? 'https://' : 'http://';
}
</code></pre>

blocks|key|981656|text|是的，这是因为反向代理将执行SSL终止，这意味着浏览器请求https，但是从代理到应用程序的请求是http。这有许多好处(提高性能)，但它确实有这个副作用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|981657|我认为该解决方案将作为一个环境变量，它告诉您强制https+(当使用web进行分阶段或生产时)，或者在本地开发时以http的形式离开。|981658|我认为是最有效的。我这么说是因为你的应用程序永远不知道什么时候使用https。|981659|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Yes, that happens because the reverse proxy will do SSL termination, which means that the browser requests https, but the request that goes from the proxy to the app is http. This has many benefits (improved performance) but it does have this side-effect.
I think the solution would go as an environment variable that tells you to force https (when using the web on staging or production) or to leave as http when e.g. developing locally.
I think is the most effective. I say this because your app will never know when to use https or not.

blocks|key|787171|text|如果有人像我一样陷入同样的问题，为了让asset函数获得正确的模式，您必须启用TrustedProxies。在laravel中，有一个中间件可以在\App\Http\Middleware\TrustedProxies中为您实现这一点，但是您必须在默认的中间件中包含它，然后它才能生效。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|787172|Laravel使用fideloper/TrustedProxy包，它在Request对象中设置trustedProxies数组，并对其进行检查，以批准标头中提供的X-Forwarded-Proto。|787173|您可以查看以下链接以获得更多详细信息|787174|详细解释了Laravel可信代理|787175|为了建立它|787176|entityMap|0|LINK|mutability|MUTABLE|url|https://fideloper.com/laravel-4-trusted-proxies|1|https://packagist.org/packages/fideloper/proxy^0|J|5|13|E|21|Z|0|9|M|Z|7|1B|E|29|H|0|0|0|G|0|0|0|5|1|0^^$0|@$1|2|3|4|5|6|7|X|8|@$9|Y|A|Z|B|C]|$9|10|A|11|B|C]|$9|12|A|13|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|14|8|@$9|15|A|16|B|C]|$9|17|A|18|B|C]|$9|19|A|1A|B|C]|$9|1B|A|1C|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1D|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|1E|8|@]|D|@$9|1F|A|1G|1|1H]]|E|$]]|$1|L|3|M|5|6|7|1I|8|@]|D|@$9|1J|A|1K|1|1L]]|E|$]]|$1|N|3|-4|5|6|7|1M|8|@]|D|@]|E|$]]]|O|$P|$5|Q|R|S|E|$T|U]]|V|$5|Q|R|S|E|$T|W]]]]

In case anyone falls into this same issue like I did in order to allow the <code>asset</code> function to get the proper schema you would have to enable <code>TrustedProxies</code>.
In laravel there is a middleware that does that for you in <code>\App\Http\Middleware\TrustedProxies</code> but you must included it in your default middleware before it can take effect.
Laravel uses the <code>fideloper/TrustedProxy</code> package which sets the <code>trustedProxies</code> array in the <code>Request</code> object which is checked in order to approve the <code>X-Forwarded-Proto</code> provided in the header.
You can check the following link to get more details
<a href="https://fideloper.com/laravel-4-trusted-proxies" rel="nofollow noreferrer">Explains in Laravel Trusted Proxy in details</a>
<a href="https://packagist.org/packages/fideloper/proxy" rel="nofollow noreferrer">For Setting it up</a>

blocks|key|787226|text|我在一些在Laravel4.2中构建的遗留系统中做了一些维护工作，在这种情况下我遇到了绊脚石。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|787227|在了解了生成器如何实例化和使用之后，我解决了在应用程序的环境检测到UrlGenerator+forcedSchema属性之后设置start.php属性的问题。|offset|length|style|CODE|787228|//+The+if+condition+depends+on+what+identifies+your+https+host
if(+str_contains($_SERVER['HTTP_HOST'],+'secure_app_host_fragment')){
++++$app['url']->forceSchema('https');
}|code-block|syntax|javascript|787229|代码：https://github.com/laravel/framework/blob/7d9e7068c49f945385673014d4cba4de28accd5e/src/Illuminate/Routing/UrlGenerator.php#L204|787230|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/laravel/framework/blob/7d9e7068c49f945385673014d4cba4de28accd5e/src/Illuminate/Routing/UrlGenerator.php#L204^0|0|X|C|1A|C|1S|9|0|0|3|3J|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@$D|Y|E|Z|F|G]|$D|10|E|11|F|G]|$D|12|E|13|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|14|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|15|8|@]|9|@$D|16|E|17|1|18]]|A|$]]|$1|O|3|-4|5|6|7|19|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

I was doing some maintenance in some legacy systems built in Laravel 4.2 and stumbled in this situation.
After giving a look at how the Generators are instantiated and used, I solved the problem setting the <code>UrlGenerator</code> <code>forcedSchema</code> property after the environment detection at the <code>start.php</code> file of the application.
<pre><code>// The if condition depends on what identifies your https host
if( str_contains($_SERVER['HTTP_HOST'], 'secure_app_host_fragment')){
 $app['url']-&gt;forceSchema('https');
}
</code></pre>
Code:
<a href="https://github.com/laravel/framework/blob/7d9e7068c49f945385673014d4cba4de28accd5e/src/Illuminate/Routing/UrlGenerator.php#L204" rel="nofollow noreferrer">https://github.com/laravel/framework/blob/7d9e7068c49f945385673014d4cba4de28accd5e/src/Illuminate/Routing/UrlGenerator.php#L204</a>

I'm using <code>asset()</code> public method to generate correct url in laravel.

in docs it says:

<a href="https://i.stack.imgur.com/ny6fY.png" rel="noreferrer"><img src="https://i.stack.imgur.com/ny6fY.png" alt="enter image description here"></a>

So in theory it should detect correct scheme itself.

But in code I see: <a href="https://github.com/illuminate/routing/blob/master/UrlGenerator.php#L210" rel="noreferrer">https://github.com/illuminate/routing/blob/master/UrlGenerator.php#L210</a>

<pre><code>public function asset($path, $secure = null)
 {
</code></pre>

default for secure is null. So this method is no good for both http/https.

what am I missing here?

I'm using reverse proxy, could it because of that?

laravel asset() method doesn't return https

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在使用asset()的公共方法生成正确的url在laravel。医生里写着：​​因此，在理论上，它应该检测出正确的方案本身。但是在我看到的代码中：public function asset($path, $secure = null)    {“安全”的默认值为空。因此，这个方法对http/https都没有好处。我在这里错过了什么？我用的是反向代理，是因为这个吗？

问laravel asset()方法不返回https
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