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<?php
/**
* @see https://github.com/zendframework/zend-http for the canonical source repository
* @copyright Copyright (c) 2005-2017 Zend Technologies USA Inc. (http://www.zend.com)
* @license https://github.com/zendframework/zend-http/blob/master/LICENSE.md New BSD License
*/
namespace Zend\Http\Header;
/**
* Content-Location Header
*/
class GenericHeader implements HeaderInterface
{
/**
* @var string
*/
protected $fieldName;
/**
* @var string
*/
protected $fieldValue;
/**
* Factory to generate a header object from a string
*
* @static
* @param string $headerLine
* @return GenericHeader
*/
public static function fromString($headerLine)
{
list($fieldName, $fieldValue) = GenericHeader::splitHeaderLine($headerLine);
$header = new static($fieldName, $fieldValue);
return $header;
}
/**
* Splits the header line in `name` and `value` parts.
*
* @param string $headerLine
* @return string[] `name` in the first index and `value` in the second.
* @throws Exception\InvalidArgumentException If header does not match with the format ``name:value``
*/
public static function splitHeaderLine($headerLine)
{
$parts = explode(':', $headerLine, 2);
if (count($parts) !== 2) {
throw new Exception\InvalidArgumentException('Header must match with the format "name:value"');
}
if (! HeaderValue::isValid($parts[1])) {
throw new Exception\InvalidArgumentException('Invalid header value detected');
}
$parts[1] = ltrim($parts[1]);
return $parts;
}
/**
* Constructor
*
* @param null|string $fieldName
* @param null|string $fieldValue
*/
public function __construct($fieldName = null, $fieldValue = null)
{
if ($fieldName) {
$this->setFieldName($fieldName);
}
if ($fieldValue !== null) {
$this->setFieldValue($fieldValue);
}
}
/**
* Set header field name
*
* @param string $fieldName
* @return GenericHeader
* @throws Exception\InvalidArgumentException If the name does not match with RFC 2616 format.
*/
public function setFieldName($fieldName)
{
if (! is_string($fieldName) || empty($fieldName)) {
throw new Exception\InvalidArgumentException('Header name must be a string');
}
/*
* Following RFC 7230 section 3.2
*
* header-field = field-name ":" [ field-value ]
* field-name = token
* token = 1*tchar
* tchar = "!" / "#" / "$" / "%" / "&" / "'" / "*" / "+" / "-" / "." /
* "^" / "_" / "`" / "|" / "~" / DIGIT / ALPHA
*/
if (! preg_match('/^[!#$%&\'*+\-\.\^_`|~0-9a-zA-Z]+$/', $fieldName)) {
throw new Exception\InvalidArgumentException(
'Header name must be a valid RFC 7230 (section 3.2) field-name.'
);
}
$this->fieldName = $fieldName;
return $this;
}
/**
* Retrieve header field name
*
* @return string
*/
public function getFieldName()
{
return $this->fieldName;
}
/**
* Set header field value
*
* @param string $fieldValue
* @return GenericHeader
*/
public function setFieldValue($fieldValue)
{
$fieldValue = (string) $fieldValue;
HeaderValue::assertValid($fieldValue);
if (preg_match('/^\s+$/', $fieldValue)) {
$fieldValue = '';
}
$this->fieldValue = $fieldValue;
return $this;
}
/**
* Retrieve header field value
*
* @return string
*/
public function getFieldValue()
{
return $this->fieldValue;
}
/**
* Cast to string as a well formed HTTP header line
*
* Returns in form of "NAME: VALUE\r\n"
*
* @return string
*/
public function toString()
{
return $this->getFieldName() . ': ' . $this->getFieldValue();
}
}