359 lines
11 KiB
PHP
359 lines
11 KiB
PHP
<?php
|
|
|
|
class HttpException extends \Exception
|
|
{
|
|
public ?Response $response;
|
|
|
|
public function __construct(string $message = '', int $statusCode = 0, ?Response $response = null)
|
|
{
|
|
parent::__construct($message, $statusCode);
|
|
$this->response = $response ?? new Response('', 0);
|
|
}
|
|
|
|
public static function fromResponse(Response $response, string $url): HttpException
|
|
{
|
|
$message = sprintf(
|
|
'%s resulted in %s %s %s',
|
|
$url,
|
|
$response->getCode(),
|
|
$response->getStatusLine(),
|
|
// If debug, include a part of the response body in the exception message
|
|
Debug::isEnabled() ? mb_substr($response->getBody(), 0, 500) : '',
|
|
);
|
|
if (CloudFlareException::isCloudFlareResponse($response)) {
|
|
return new CloudFlareException($message, $response->getCode(), $response);
|
|
}
|
|
return new HttpException(trim($message), $response->getCode(), $response);
|
|
}
|
|
}
|
|
|
|
final class CloudFlareException extends HttpException
|
|
{
|
|
public static function isCloudFlareResponse(Response $response): bool
|
|
{
|
|
$cloudflareTitles = [
|
|
'<title>Just a moment...',
|
|
'<title>Please Wait...',
|
|
'<title>Attention Required!',
|
|
'<title>Security | Glassdoor',
|
|
'<title>Access denied</title>', // cf as seen on patreon.com
|
|
];
|
|
foreach ($cloudflareTitles as $cloudflareTitle) {
|
|
if (str_contains($response->getBody(), $cloudflareTitle)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
|
|
interface HttpClient
|
|
{
|
|
public function request(string $url, array $config = []): Response;
|
|
}
|
|
|
|
final class CurlHttpClient implements HttpClient
|
|
{
|
|
public function request(string $url, array $config = []): Response
|
|
{
|
|
$defaults = [
|
|
'useragent' => null,
|
|
'timeout' => 5,
|
|
'headers' => [],
|
|
'proxy' => null,
|
|
'curl_options' => [],
|
|
'if_not_modified_since' => null,
|
|
'retries' => 2,
|
|
'max_filesize' => null,
|
|
'max_redirections' => 5,
|
|
];
|
|
$config = array_merge($defaults, $config);
|
|
|
|
$ch = curl_init($url);
|
|
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
|
|
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
|
|
curl_setopt($ch, CURLOPT_MAXREDIRS, $config['max_redirections']);
|
|
curl_setopt($ch, CURLOPT_HEADER, false);
|
|
$httpHeaders = [];
|
|
foreach ($config['headers'] as $name => $value) {
|
|
$httpHeaders[] = sprintf('%s: %s', $name, $value);
|
|
}
|
|
curl_setopt($ch, CURLOPT_HTTPHEADER, $httpHeaders);
|
|
if ($config['useragent']) {
|
|
curl_setopt($ch, CURLOPT_USERAGENT, $config['useragent']);
|
|
}
|
|
curl_setopt($ch, CURLOPT_TIMEOUT, $config['timeout']);
|
|
curl_setopt($ch, CURLOPT_ENCODING, '');
|
|
curl_setopt($ch, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
|
|
|
|
if ($config['max_filesize']) {
|
|
// This option inspects the Content-Length header
|
|
curl_setopt($ch, CURLOPT_MAXFILESIZE, $config['max_filesize']);
|
|
curl_setopt($ch, CURLOPT_NOPROGRESS, false);
|
|
// This progress function will monitor responses who omit the Content-Length header
|
|
curl_setopt($ch, CURLOPT_PROGRESSFUNCTION, function ($ch, $downloadSize, $downloaded, $uploadSize, $uploaded) use ($config) {
|
|
if ($downloaded > $config['max_filesize']) {
|
|
// Return a non-zero value to abort the transfer
|
|
return -1;
|
|
}
|
|
return 0;
|
|
});
|
|
}
|
|
|
|
if ($config['proxy']) {
|
|
curl_setopt($ch, CURLOPT_PROXY, $config['proxy']);
|
|
}
|
|
if (curl_setopt_array($ch, $config['curl_options']) === false) {
|
|
throw new \Exception('Tried to set an illegal curl option');
|
|
}
|
|
|
|
if ($config['if_not_modified_since']) {
|
|
curl_setopt($ch, CURLOPT_TIMEVALUE, $config['if_not_modified_since']);
|
|
curl_setopt($ch, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
|
|
}
|
|
|
|
$responseStatusLines = [];
|
|
$responseHeaders = [];
|
|
curl_setopt($ch, CURLOPT_HEADERFUNCTION, function ($ch, $rawHeader) use (&$responseHeaders, &$responseStatusLines) {
|
|
$len = strlen($rawHeader);
|
|
if ($rawHeader === "\r\n") {
|
|
return $len;
|
|
}
|
|
if (preg_match('#^HTTP/(2|1.1|1.0)#', $rawHeader)) {
|
|
$responseStatusLines[] = trim($rawHeader);
|
|
return $len;
|
|
}
|
|
$header = explode(':', $rawHeader);
|
|
if (count($header) === 1) {
|
|
return $len;
|
|
}
|
|
$name = mb_strtolower(trim($header[0]));
|
|
$value = trim(implode(':', array_slice($header, 1)));
|
|
if (!isset($responseHeaders[$name])) {
|
|
$responseHeaders[$name] = [];
|
|
}
|
|
$responseHeaders[$name][] = $value;
|
|
return $len;
|
|
});
|
|
|
|
// This retry logic is a bit hard to understand, but it works
|
|
$tries = 0;
|
|
while (true) {
|
|
$tries++;
|
|
$body = curl_exec($ch);
|
|
if ($body !== false) {
|
|
// The network call was successful, so break out of the loop
|
|
break;
|
|
}
|
|
if ($tries <= $config['retries']) {
|
|
continue;
|
|
}
|
|
// Max retries reached, give up
|
|
$curl_error = curl_error($ch);
|
|
$curl_errno = curl_errno($ch);
|
|
throw new HttpException(sprintf(
|
|
'cURL error %s: %s (%s) for %s',
|
|
$curl_error,
|
|
$curl_errno,
|
|
'https://curl.haxx.se/libcurl/c/libcurl-errors.html',
|
|
$url
|
|
));
|
|
}
|
|
|
|
$statusCode = curl_getinfo($ch, CURLINFO_RESPONSE_CODE);
|
|
curl_close($ch);
|
|
return new Response($body, $statusCode, $responseHeaders);
|
|
}
|
|
}
|
|
|
|
final class Request
|
|
{
|
|
private array $get;
|
|
private array $server;
|
|
private array $attributes;
|
|
|
|
private function __construct()
|
|
{
|
|
}
|
|
|
|
public static function fromGlobals(): self
|
|
{
|
|
$self = new self();
|
|
$self->get = $_GET;
|
|
$self->server = $_SERVER;
|
|
$self->attributes = [];
|
|
return $self;
|
|
}
|
|
|
|
public static function fromCli(array $cliArgs): self
|
|
{
|
|
$self = new self();
|
|
$self->get = $cliArgs;
|
|
return $self;
|
|
}
|
|
|
|
public function get(string $key, $default = null): ?string
|
|
{
|
|
return $this->get[$key] ?? $default;
|
|
}
|
|
|
|
public function server(string $key, string $default = null): ?string
|
|
{
|
|
return $this->server[$key] ?? $default;
|
|
}
|
|
|
|
public function withAttribute(string $name, $value = true): self
|
|
{
|
|
$clone = clone $this;
|
|
$clone->attributes[$name] = $value;
|
|
return $clone;
|
|
}
|
|
|
|
public function attribute(string $key, $default = null)
|
|
{
|
|
return $this->attributes[$key] ?? $default;
|
|
}
|
|
|
|
public function toArray(): array
|
|
{
|
|
return $this->get;
|
|
}
|
|
}
|
|
|
|
final class Response
|
|
{
|
|
public const STATUS_CODES = [
|
|
'100' => 'Continue',
|
|
'101' => 'Switching Protocols',
|
|
'200' => 'OK',
|
|
'201' => 'Created',
|
|
'202' => 'Accepted',
|
|
'203' => 'Non-Authoritative Information',
|
|
'204' => 'No Content',
|
|
'205' => 'Reset Content',
|
|
'206' => 'Partial Content',
|
|
'300' => 'Multiple Choices',
|
|
'301' => 'Moved Permanently',
|
|
'302' => 'Found',
|
|
'303' => 'See Other',
|
|
'304' => 'Not Modified',
|
|
'305' => 'Use Proxy',
|
|
'400' => 'Bad Request',
|
|
'401' => 'Unauthorized',
|
|
'402' => 'Payment Required',
|
|
'403' => 'Forbidden',
|
|
'404' => 'Not Found',
|
|
'405' => 'Method Not Allowed',
|
|
'406' => 'Not Acceptable',
|
|
'407' => 'Proxy Authentication Required',
|
|
'408' => 'Request Timeout',
|
|
'409' => 'Conflict',
|
|
'410' => 'Gone',
|
|
'411' => 'Length Required',
|
|
'412' => 'Precondition Failed',
|
|
'413' => 'Request Entity Too Large',
|
|
'414' => 'Request-URI Too Long',
|
|
'415' => 'Unsupported Media Type',
|
|
'416' => 'Requested Range Not Satisfiable',
|
|
'417' => 'Expectation Failed',
|
|
'429' => 'Too Many Requests',
|
|
'500' => 'Internal Server Error',
|
|
'501' => 'Not Implemented',
|
|
'502' => 'Bad Gateway',
|
|
'503' => 'Service Unavailable',
|
|
'504' => 'Gateway Timeout',
|
|
'505' => 'HTTP Version Not Supported'
|
|
];
|
|
private string $body;
|
|
private int $code;
|
|
private array $headers;
|
|
|
|
public function __construct(
|
|
string $body = '',
|
|
int $code = 200,
|
|
array $headers = []
|
|
) {
|
|
$this->body = $body;
|
|
$this->code = $code;
|
|
$this->headers = [];
|
|
|
|
foreach ($headers as $name => $value) {
|
|
$name = mb_strtolower($name);
|
|
if (!isset($this->headers[$name])) {
|
|
$this->headers[$name] = [];
|
|
}
|
|
if (is_string($value)) {
|
|
$this->headers[$name][] = $value;
|
|
}
|
|
if (is_array($value)) {
|
|
$this->headers[$name] = $value;
|
|
}
|
|
}
|
|
}
|
|
|
|
public function getBody(): string
|
|
{
|
|
return $this->body;
|
|
}
|
|
|
|
public function getCode(): int
|
|
{
|
|
return $this->code;
|
|
}
|
|
|
|
public function getStatusLine(): string
|
|
{
|
|
return self::STATUS_CODES[$this->code] ?? '';
|
|
}
|
|
|
|
public function getHeaders(): array
|
|
{
|
|
return $this->headers;
|
|
}
|
|
|
|
/**
|
|
* HTTP response may have multiple headers with the same name.
|
|
*
|
|
* This method by default, returns only the last header.
|
|
*
|
|
* @return string[]|string|null
|
|
*/
|
|
public function getHeader(string $name, bool $all = false)
|
|
{
|
|
$name = mb_strtolower($name);
|
|
$header = $this->headers[$name] ?? null;
|
|
if (!$header) {
|
|
return null;
|
|
}
|
|
if ($all) {
|
|
return $header;
|
|
}
|
|
return array_pop($header);
|
|
}
|
|
|
|
public function withHeader(string $name, string $value): self
|
|
{
|
|
$clone = clone $this;
|
|
$clone->headers[$name] = [$value];
|
|
return $clone;
|
|
}
|
|
|
|
public function withBody(string $body): self
|
|
{
|
|
$clone = clone $this;
|
|
$clone->body = $body;
|
|
return $clone;
|
|
}
|
|
|
|
public function send(): void
|
|
{
|
|
http_response_code($this->code);
|
|
foreach ($this->headers as $name => $values) {
|
|
foreach ($values as $value) {
|
|
header(sprintf('%s: %s', $name, $value));
|
|
}
|
|
}
|
|
print $this->body;
|
|
}
|
|
}
|