感谢@SJFrK,我的问题已经解决了。以下课程允许我做我需要的。问题在课后。
class Redirects
{
/*
|--------------------------------------------------------------------------
| Placeholder Types
|--------------------------------------------------------------------------
|
| An array of placeholder types thatalow specific characters in a source
| route or URL.
|
*/
private static $placeholders = array(
':all' => '.*',
':alpha' => '[a-z]+',
':alphanum' => '[a-z0-9]+',
':any' => '[a-z0-9\.\-_%=]+',
':num' => '[0-9]+',
':segment' => '[a-z0-9\-\_]+',
':segments' => '[a-z0-9\-\_\/]+',
);
/*
|--------------------------------------------------------------------------
| Computed Replacements
|--------------------------------------------------------------------------
|
| An array that contains converted source placeholders.
|
*/
private static $computed_replacements = array();
/*
|--------------------------------------------------------------------------
| Computed Replacements
|--------------------------------------------------------------------------
|
| Class-scoped string that contains a replacement route or URL from
| site.redirects.
|
*/
private static $destination;
/**
* Check for a redirect. If it exists, then redirect to it's computed replacement.
*
* @return Response
*/
public static function redirect()
{
// Only do this if redirects have been defined.
if (Config::has('site.redirects') && count(Config::get('site.redirects') > 0))
{
$route = URI::current();
// Get the available placeholders from static::$placeholders and
// convert them into applicable options for the pattern.
$available_placeholders = '';
foreach (static::$placeholders as $placeholder => $expression)
$available_placeholders .= ltrim("$placeholder|", ':');
$available_placeholders = rtrim($available_placeholders, '|');
// Define the pattern.
$pattern = '/\((\w+):('.$available_placeholders.')\)/';
// Get the redirects.
$redirects = Config::get('site.redirects');
// For each redirect, convert all the place holders and resulting
// values, and check for a match. If one exists, then redirect to it.
foreach ($redirects as $from => $to) {
static::$computed_replacements = array();
static::$destination = $to;
$from = rtrim($from, '/');
$to = rtrim($to, '/');
// Convert the placeholders in $from (if any)
$converted_placeholders = preg_replace_callback($pattern, function($captures) {
static::$computed_replacements[] = $captures[1];
return '('.static::$placeholders[":{$captures[2]}"].')';
}, $from);
// Get the replacements
$converted_replacements = preg_replace_callback("#^{$converted_placeholders}$#i", function($captures) {
$output = static::$destination;
for ($c = 1, $n = count($captures); $c < $n; ++$c)
{
$value = array_shift(static::$computed_replacements);
$output = str_replace("<$value>", $captures[$c], $output);
}
return $output;
}, $route);
// If the current route matches the converted expression, then redirect.
if (preg_match("!^{$converted_placeholders}$!i", $route))
return Redirect::to($converted_replacements, 301)
->with('moved-from', $route)
->with('moved-from-rule', "'$from': '".static::$destination."'");
}
}
else return;
}
}
我正在编写Laravel(FTW)中的静态网站捆绑包,并且遇到了一些我似乎无法解决的问题。
该应用程序包含一个配置文件(config/site.php
),其中包含一系列重定向查找。我们的想法是检查每个查找URI中的匹配项,然后重定向到替换URI(当然,使用301重定向) - 对于将静态HTML站点移动到我的包中的人来说非常有用。
数组的格式为:
'redirects' => array(
'<source>' => '<destination>'
)
在<source>
中,用户可以包含以下内容:
(:any)
,(:all)
,(:num)
或(:alpha)
- 我添加了最后一个。例如,用户可以使用以下重定向(请注意,我已选择使用<destination>
的角度parenthises,因为它更美观 - 它被转换回其正则表达式等效[见类下文]):
'(:all).html' => '<1>'
这会将以.html
结尾的任何页面指向不包含它的路由。示例:http://example.com/about.html
会重定向到http://example.com/about
。
我希望能够“命名”每个参数以便于阅读(和令人愉快的编码)。我想要做的是在<source>
中为每个占位符命名(当然这是可选的),并定义一个占位符类型。例如:
'(name:all).html' => '<name>'
现在,考虑到占位符可以命名,它们自然可以在<destination>
内的任何顺序,例如(注意目标URI中的顺序更改):
'Products/(name:any)-(category:any)-(id:num).html' => 'products/<category>/<id>/<name>/overview'
使用常规占位符语法,我可以将其解释为:
'Products/(:any)-(:any)-(:num).html' => 'products/<2>/<3>/<1>'
无论如何这都是后备 - 我需要找出如何使用preg_replace
将名称替换为相应的捕获组。但似乎不可能使用命名参数/捕获:
一个简单的方法是在preg_replace
中使用命名参数,但是(据我所知)PHP不支持它。
使用这种方法可以让我使用相同类型的替换工具来完成任务 - 所以没有它可用有点令人失望。
尽管如此,我很乐意回复一些更复杂的事情(无论如何这都是好事)。事情是,我不知道如何 - 并且解决方案不是来找我。我查看过Silex RouteCompiler
类,但完全不了解它。我觉得,考虑到Laravel的主干基于Symfony组件集(很像Silex),可能有更好的方法来实现我的需要。
有没有人有同样的要求,也许找到了解决方案?这里的任何帮助都会非常棒!提前谢谢。
这是处理重定向的类的源代码。我只需在Redirects::handle()
文件中拨打routes.php
。
class Redirects
{
private static $placeholders = array(
':any' => '[a-zA-Z0-9\.\-_%=]+',
':num' => '[0-9]+',
':alpha' => '[a-z]+', //added
':all' => '.*',
);
private static $replacement_identifiers = array(
'(\<([0-9]+)\>)' => '$$1',
);
/**
* Create the applicable regex placeholders
*
* @param string &$from
* @param string &$to
* @return void
*/
protected static function placeholders(string &$from, string &$to)
{
// Replace the <source> with a match expression
foreach (static::$placeholders as $placeholder => $expression)
$from = str_replace("({$placeholder})", "({$expression})", $from);
// Replace the <destination> with a replacement expression
foreach (static::$replacement_identifiers as $identifier => $expression)
if (preg_match($identifier, $to))
$to = preg_replace($identifier, $expression, $to);
}
/**
* Return the response of any redirects, or void if none
*
* @return Response|void
*/
public static function handle()
{
$route = URI::current();
if (Config::has('site.redirects'))
{
$redirects = Config::get('site.redirects');
foreach ($redirects as $from => $to) {
$from = rtrim($from, '/');
static::placeholders($from, $to);
if (preg_match("!^{$from}$!i", $route))
{
if (strpos($to, '$') !== false and strpos($from, '(') !== false)
$to = preg_replace("!^{$from}$!i", $to, $route);
return Redirect::to($to, 301)->with('Moved-From', $route);
}
else return;
}
}
else return;
}
}
答案 0 :(得分:1)
这是一个测试用例,它可以满足您的需求,也许您可以将它合并到您的课程中?:
<?php
class Redirects {
private static $placeholders = array(
':any' => '[a-zA-Z0-9\.\-_%=]+',
':num' => '[0-9]+',
':alpha' => '[a-z]+', //added
':all' => '.*',
);
private static $tmp;
private static $tmpValue;
public static function handle() {
$case = array('Products/(name:any)-(category:any)-(id:num).html' => 'products/<category>/<id>/<name>/overview');
$test = 'Products/productName-categoryName-123.html'; // products/categoryName/123/productName/overview
$pattern = '/\(\s*?(\w*?)\s*?:\s*?(\w*?)\s*?\)/';
foreach ($case as $k => $v) {
self::$tmp = array();
self::$tmpValue = $v;
$step1 = preg_replace_callback($pattern, array(self, 'replace_step1'), $k);
$step2 = preg_replace_callback('#' . $step1 . '#', array(self, 'replace_step2'), $test);
print 'case: ' . $k . '<br>';
print 'step1: ' . $step1 . '<br>';
print 'step2: ' . $step2 . '<br>';
}
}
private static function replace_step1($matches) {
self::$tmp[] = $matches[1];
return '(' . self::$placeholders[':' . $matches[2]] . ')';
}
private static function replace_step2($matches) {
$str = self::$tmpValue;
for ($i = 1, $n = count($matches); $i < $n; ++$i) {
$value = array_shift(self::$tmp);
$str = str_replace('<' . $value . '>', $matches[$i], $str);
}
return $str;
}
}
Redirects::handle();
它首先用真正的PREG占位符替换您的命名占位符,并将它们存储在数组$tmp
中。然后检查测试字符串$test
是否与该模式$step1
匹配,并根据$tmp
数组替换它们。