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AphrontHTTPHeaderParser.php
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Created
Fri, Nov 22, 07:20

AphrontHTTPHeaderParser.php
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<?php
final class AphrontHTTPHeaderParser extends Phobject {
private $name;
private $content;
private $pairs;
public function parseRawHeader($raw_header) {
$this->name = null;
$this->content = null;
$parts = explode(':', $raw_header, 2);
$this->name = trim($parts[0]);
if (count($parts) > 1) {
$this->content = trim($parts[1]);
}
$this->pairs = null;
return $this;
}
public function getHeaderName() {
$this->requireParse();
return $this->name;
}
public function getHeaderContent() {
$this->requireParse();
return $this->content;
}
public function getHeaderContentAsPairs() {
$content = $this->getHeaderContent();
$state = 'prekey';
$length = strlen($content);
$pair_name = null;
$pair_value = null;
$pairs = array();
$ii = 0;
while ($ii < $length) {
$c = $content[$ii];
switch ($state) {
case 'prekey';
// We're eating space in front of a key.
if ($c == ' ') {
$ii++;
break;
}
$pair_name = '';
$state = 'key';
break;
case 'key';
// We're parsing a key name until we find "=" or ";".
if ($c == ';') {
$state = 'done';
break;
}
if ($c == '=') {
$ii++;
$state = 'value';
break;
}
$ii++;
$pair_name .= $c;
break;
case 'value':
// We found an "=", so now figure out if the value is quoted
// or not.
if ($c == '"') {
$ii++;
$state = 'quoted';
break;
}
$state = 'unquoted';
break;
case 'quoted':
// We're in a quoted string, parse until we find the closing quote.
if ($c == '"') {
$ii++;
$state = 'done';
break;
}
$ii++;
$pair_value .= $c;
break;
case 'unquoted':
// We're in an unquoted string, parse until we find a space or a
// semicolon.
if ($c == ' ' || $c == ';') {
$state = 'done';
break;
}
$ii++;
$pair_value .= $c;
break;
case 'done':
// We parsed something, so eat any trailing whitespace and semicolons
// and look for a new value.
if ($c == ' ' || $c == ';') {
$ii++;
break;
}
$pairs[] = array(
$pair_name,
$pair_value,
);
$pair_name = null;
$pair_value = null;
$state = 'prekey';
break;
}
}
if ($state == 'quoted') {
throw new Exception(
pht(
'Header has unterminated double quote for key "%s".',
$pair_name));
}
if ($pair_name !== null) {
$pairs[] = array(
$pair_name,
$pair_value,
);
}
return $pairs;
}
private function requireParse() {
if ($this->name === null) {
throw new PhutilInvalidStateException('parseRawHeader');
}
}
}

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