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<?php
namespace Unirest;
class Request
{
private static $cookie = null;
private static $cookieFile = null;
private static $curlOpts = array();
private static $handle = null;
private static $jsonOpts = array();
private static $socketTimeout = null;
private static $enableRetries = false; // should we enable retries feature
private static $maxNumberOfRetries = 3; // total number of allowed retries
private static $retryOnTimeout = false; // Should we retry on timeout?
private static $retryInterval = 1.0; // Initial retry interval in seconds, to be increased by backoffFactor
private static $maximumRetryWaitTime = 120; // maximum retry wait time (commutative)
private static $backoffFactor = 2.0; // backoff factor to be used to increase retry interval
private static $httpStatusCodesToRetry = array(408, 413, 429, 500, 502, 503, 504, 521, 522, 524);
private static $httpMethodsToRetry = array("GET", "PUT");
private static $overrideRetryForNextRequest = OverrideRetry::USE_GLOBAL_SETTINGS;
private static $verifyPeer = true;
private static $verifyHost = true;
private static $defaultHeaders = array();
private static $auth = array (
'user' => '',
'pass' => '',
'method' => CURLAUTH_BASIC
);
private static $proxy = array(
'port' => false,
'tunnel' => false,
'address' => false,
'type' => CURLPROXY_HTTP,
'auth' => array (
'user' => '',
'pass' => '',
'method' => CURLAUTH_BASIC
)
);
protected static $totalNumberOfConnections = 0;
/**
* Set JSON decode mode
*
* @param bool $assoc When TRUE, returned objects will be converted into associative arrays.
* @param integer $depth User specified recursion depth.
* @param integer $options Bitmask of JSON decode options. Currently only JSON_BIGINT_AS_STRING is supported (default is to cast large integers as floats)
* @return array
*/
public static function jsonOpts($assoc = false, $depth = 512, $options = 0)
{
return self::$jsonOpts = array($assoc, $depth, $options);
}
/**
* Verify SSL peer
*
* @param bool $enabled enable SSL verification, by default is true
* @return bool
*/
public static function verifyPeer($enabled)
{
return self::$verifyPeer = $enabled;
}
/**
* Verify SSL host
*
* @param bool $enabled enable SSL host verification, by default is true
* @return bool
*/
public static function verifyHost($enabled)
{
return self::$verifyHost = $enabled;
}
/**
* Set a timeout
*
* @param integer $seconds timeout value in seconds
* @return integer
*/
public static function timeout($seconds)
{
return self::$socketTimeout = $seconds;
}
/**
* Should we enable retries feature
*
* @param bool $enableRetries
* @return bool
*/
public static function enableRetries($enableRetries)
{
return self::$enableRetries = $enableRetries;
}
/**
* Total number of allowed retries
*
* @param integer $maxNumberOfRetries
* @return integer
*/
public static function maxNumberOfRetries($maxNumberOfRetries)
{
return self::$maxNumberOfRetries = $maxNumberOfRetries;
}
/**
* Should we retry on timeout
*
* @param bool $retryOnTimeout
* @return bool
*/
public static function retryOnTimeout($retryOnTimeout)
{
return self::$retryOnTimeout = $retryOnTimeout;
}
/**
* Initial retry interval in seconds, to be increased by backoffFactor
*
* @param float $retryInterval
* @return float
*/
public static function retryInterval($retryInterval)
{
return self::$retryInterval = $retryInterval;
}
/**
* Maximum retry wait time
*
* @param integer $maximumRetryWaitTime
* @return integer
*/
public static function maximumRetryWaitTime($maximumRetryWaitTime)
{
return self::$maximumRetryWaitTime = $maximumRetryWaitTime;
}
/**
* Backoff factor to be used to increase retry interval
*
* @param float $backoffFactor
* @return float
*/
public static function backoffFactor($backoffFactor)
{
return self::$backoffFactor = $backoffFactor;
}
/**
* Http status codes to retry against
*
* @param integer[] $httpStatusCodesToRetry
* @return integer[]
*/
public static function httpStatusCodesToRetry($httpStatusCodesToRetry)
{
return self::$httpStatusCodesToRetry = $httpStatusCodesToRetry;
}
/**
* Http methods to retry against
*
* @param string[] $httpMethodsToRetry
* @return string[]
*/
public static function httpMethodsToRetry($httpMethodsToRetry)
{
return self::$httpMethodsToRetry = $httpMethodsToRetry;
}
/**
* Enable or disable retries for next request, ignoring httpMethods whitelist.
*
* @param string $overrideRetryForNextRequest
* @return string
*/
public static function overrideRetryForNextRequest($overrideRetryForNextRequest)
{
return self::$overrideRetryForNextRequest = $overrideRetryForNextRequest;
}
/**
* Set default headers to send on every request
*
* @param array $headers headers array
* @return array
*/
public static function defaultHeaders($headers)
{
return self::$defaultHeaders = array_merge(self::$defaultHeaders, $headers);
}
/**
* Set a new default header to send on every request
*
* @param string $name header name
* @param string $value header value
* @return string
*/
public static function defaultHeader($name, $value)
{
return self::$defaultHeaders[$name] = $value;
}
/**
* Clear all the default headers
*/
public static function clearDefaultHeaders()
{
return self::$defaultHeaders = array();
}
/**
* Set curl options to send on every request
*
* @param array $options options array
* @return array
*/
public static function curlOpts($options)
{
return self::mergeCurlOptions(self::$curlOpts, $options);
}
/**
* Set a new default header to send on every request
*
* @param string $name header name
* @param string $value header value
* @return string
*/
public static function curlOpt($name, $value)
{
return self::$curlOpts[$name] = $value;
}
/**
* Clear all curl opts
*/
public static function clearCurlOpts()
{
return self::$curlOpts = array();
}
/**
* Set a Mashape key to send on every request as a header
* Obtain your Mashape key by browsing one of your Mashape applications on https://www.mashape.com
*
* Note: Mashape provides 2 keys for each application: a 'Testing' and a 'Production' one.
* Be aware of which key you are using and do not share your Production key.
*
* @param string $key Mashape key
* @return string
*/
public static function setMashapeKey($key)
{
return self::defaultHeader('X-Mashape-Key', $key);
}
/**
* Set a cookie string for enabling cookie handling
*
* @param string $cookie
*/
public static function cookie($cookie)
{
self::$cookie = $cookie;
}
/**
* Set a cookie file path for enabling cookie handling
*
* $cookieFile must be a correct path with write permission
*
* @param string $cookieFile - path to file for saving cookie
*/
public static function cookieFile($cookieFile)
{
self::$cookieFile = $cookieFile;
}
/**
* Set authentication method to use
*
* @param string $username authentication username
* @param string $password authentication password
* @param integer $method authentication method
*/
public static function auth($username = '', $password = '', $method = CURLAUTH_BASIC)
{
self::$auth['user'] = $username;
self::$auth['pass'] = $password;
self::$auth['method'] = $method;
}
/**
* Set proxy to use
*
* @param string $address proxy address
* @param integer $port proxy port
* @param integer $type (Available options for this are CURLPROXY_HTTP, CURLPROXY_HTTP_1_0 CURLPROXY_SOCKS4, CURLPROXY_SOCKS5, CURLPROXY_SOCKS4A and CURLPROXY_SOCKS5_HOSTNAME)
* @param bool $tunnel enable/disable tunneling
*/
public static function proxy($address, $port = 1080, $type = CURLPROXY_HTTP, $tunnel = false)
{
self::$proxy['type'] = $type;
self::$proxy['port'] = $port;
self::$proxy['tunnel'] = $tunnel;
self::$proxy['address'] = $address;
}
/**
* Set proxy authentication method to use
*
* @param string $username authentication username
* @param string $password authentication password
* @param integer $method authentication method
*/
public static function proxyAuth($username = '', $password = '', $method = CURLAUTH_BASIC)
{
self::$proxy['auth']['user'] = $username;
self::$proxy['auth']['pass'] = $password;
self::$proxy['auth']['method'] = $method;
}
/**
* Send a GET request to a URL
*
* @param string $url URL to send the GET request to
* @param array $headers additional headers to send
* @param mixed $parameters parameters to send in the querystring
* @param string $username Authentication username (deprecated)
* @param string $password Authentication password (deprecated)
* @return Response
*/
public static function get($url, $headers = array(), $parameters = null, $username = null, $password = null)
{
return self::send(Method::GET, $url, $parameters, $headers, $username, $password);
}
/**
* Send a HEAD request to a URL
* @param string $url URL to send the HEAD request to
* @param array $headers additional headers to send
* @param mixed $parameters parameters to send in the querystring
* @param string $username Basic Authentication username (deprecated)
* @param string $password Basic Authentication password (deprecated)
* @return Response
*/
public static function head($url, $headers = array(), $parameters = null, $username = null, $password = null)
{
return self::send(Method::HEAD, $url, $parameters, $headers, $username, $password);
}
/**
* Send a OPTIONS request to a URL
* @param string $url URL to send the OPTIONS request to
* @param array $headers additional headers to send
* @param mixed $parameters parameters to send in the querystring
* @param string $username Basic Authentication username
* @param string $password Basic Authentication password
* @return Response
*/
public static function options($url, $headers = array(), $parameters = null, $username = null, $password = null)
{
return self::send(Method::OPTIONS, $url, $parameters, $headers, $username, $password);
}
/**
* Send a CONNECT request to a URL
* @param string $url URL to send the CONNECT request to
* @param array $headers additional headers to send
* @param mixed $parameters parameters to send in the querystring
* @param string $username Basic Authentication username (deprecated)
* @param string $password Basic Authentication password (deprecated)
* @return Response
*/
public static function connect($url, $headers = array(), $parameters = null, $username = null, $password = null)
{
return self::send(Method::CONNECT, $url, $parameters, $headers, $username, $password);
}
/**
* Send POST request to a URL
* @param string $url URL to send the POST request to
* @param array $headers additional headers to send
* @param mixed $body POST body data
* @param string $username Basic Authentication username (deprecated)
* @param string $password Basic Authentication password (deprecated)
* @return Response response
*/
public static function post($url, $headers = array(), $body = null, $username = null, $password = null)
{
return self::send(Method::POST, $url, $body, $headers, $username, $password);
}
/**
* Send DELETE request to a URL
* @param string $url URL to send the DELETE request to
* @param array $headers additional headers to send
* @param mixed $body DELETE body data
* @param string $username Basic Authentication username (deprecated)
* @param string $password Basic Authentication password (deprecated)
* @return Response
*/
public static function delete($url, $headers = array(), $body = null, $username = null, $password = null)
{
return self::send(Method::DELETE, $url, $body, $headers, $username, $password);
}
/**
* Send PUT request to a URL
* @param string $url URL to send the PUT request to
* @param array $headers additional headers to send
* @param mixed $body PUT body data
* @param string $username Basic Authentication username (deprecated)
* @param string $password Basic Authentication password (deprecated)
* @return Response
*/
public static function put($url, $headers = array(), $body = null, $username = null, $password = null)
{
return self::send(Method::PUT, $url, $body, $headers, $username, $password);
}
/**
* Send PATCH request to a URL
* @param string $url URL to send the PATCH request to
* @param array $headers additional headers to send
* @param mixed $body PATCH body data
* @param string $username Basic Authentication username (deprecated)
* @param string $password Basic Authentication password (deprecated)
* @return Response
*/
public static function patch($url, $headers = array(), $body = null, $username = null, $password = null)
{
return self::send(Method::PATCH, $url, $body, $headers, $username, $password);
}
/**
* Send TRACE request to a URL
* @param string $url URL to send the TRACE request to
* @param array $headers additional headers to send
* @param mixed $body TRACE body data
* @param string $username Basic Authentication username (deprecated)
* @param string $password Basic Authentication password (deprecated)
* @return Response
*/
public static function trace($url, $headers = array(), $body = null, $username = null, $password = null)
{
return self::send(Method::TRACE, $url, $body, $headers, $username, $password);
}
/**
* This function is useful for serializing multidimensional arrays, and avoid getting
* the 'Array to string conversion' notice
* @param array|object $data array to flatten.
* @param bool|string $parent parent key or false if no parent
* @return array
*/
public static function buildHTTPCurlQuery($data, $parent = false)
{
$result = array();
if (is_object($data)) {
$data = get_object_vars($data);
}
foreach ($data as $key => $value) {
if ($parent) {
$new_key = sprintf('%s[%s]', $parent, $key);
} else {
$new_key = $key;
}
if (!$value instanceof \CURLFile and (is_array($value) or is_object($value))) {
$result = array_merge($result, self::buildHTTPCurlQuery($value, $new_key));
} else {
$result[$new_key] = $value;
}
}
return $result;
}
protected static function initializeHandle()
{
self::$handle = curl_init();
self::$totalNumberOfConnections = 0;
}
/**
* Send a cURL request
* @param \Unirest\Method|string $method HTTP method to use
* @param string $url URL to send the request to
* @param mixed $body request body
* @param array $headers additional headers to send
* @param string $username Authentication username (deprecated)
* @param string $password Authentication password (deprecated)
* @throws \Unirest\Exception if a cURL error occurs
* @return Response
*/
public static function send($method, $url, $body = null, $headers = array(), $username = null, $password = null)
{
if (self::$handle == null) {
self::initializeHandle();
} else {
curl_reset(self::$handle);
}
if ($method !== Method::GET) {
if ($method === Method::POST) {
curl_setopt(self::$handle, CURLOPT_POST, true);
} else {
if ($method === Method::HEAD) {
curl_setopt(self::$handle, CURLOPT_NOBODY, true);
}
curl_setopt(self::$handle, CURLOPT_CUSTOMREQUEST, $method);
}
curl_setopt(self::$handle, CURLOPT_POSTFIELDS, $body);
} elseif (is_array($body)) {
if (strpos($url, '?') !== false) {
$url .= '&';
} else {
$url .= '?';
}
$url .= urldecode(http_build_query(self::buildHTTPCurlQuery($body)));
}
$curl_base_options = [
CURLOPT_URL => self::validateUrl($url),
CURLOPT_RETURNTRANSFER => true,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_MAXREDIRS => 10,
CURLOPT_HTTPHEADER => self::getFormattedHeaders($headers),
CURLOPT_HEADER => true,
CURLOPT_SSL_VERIFYPEER => self::$verifyPeer,
//CURLOPT_SSL_VERIFYHOST accepts only 0 (false) or 2 (true). Future versions of libcurl will treat values 1 and 2 as equals
CURLOPT_SSL_VERIFYHOST => self::$verifyHost === false ? 0 : 2,
// If an empty string, '', is set, a header containing all supported encoding types is sent
CURLOPT_ENCODING => ''
];
curl_setopt_array(self::$handle, self::mergeCurlOptions($curl_base_options, self::$curlOpts));
if (self::$socketTimeout !== null) {
curl_setopt(self::$handle, CURLOPT_TIMEOUT, self::$socketTimeout);
}
if (self::$cookie) {
curl_setopt(self::$handle, CURLOPT_COOKIE, self::$cookie);
}
if (self::$cookieFile) {
curl_setopt(self::$handle, CURLOPT_COOKIEFILE, self::$cookieFile);
curl_setopt(self::$handle, CURLOPT_COOKIEJAR, self::$cookieFile);
}
// supporting deprecated http auth method
if (!empty($username)) {
curl_setopt_array(self::$handle, array(
CURLOPT_HTTPAUTH => CURLAUTH_BASIC,
CURLOPT_USERPWD => $username . ':' . $password
));
}
if (!empty(self::$auth['user'])) {
curl_setopt_array(self::$handle, array(
CURLOPT_HTTPAUTH => self::$auth['method'],
CURLOPT_USERPWD => self::$auth['user'] . ':' . self::$auth['pass']
));
}
if (self::$proxy['address'] !== false) {
curl_setopt_array(self::$handle, array(
CURLOPT_PROXYTYPE => self::$proxy['type'],
CURLOPT_PROXY => self::$proxy['address'],
CURLOPT_PROXYPORT => self::$proxy['port'],
CURLOPT_HTTPPROXYTUNNEL => self::$proxy['tunnel'],
CURLOPT_PROXYAUTH => self::$proxy['auth']['method'],
CURLOPT_PROXYUSERPWD => self::$proxy['auth']['user'] . ':' . self::$proxy['auth']['pass']
));
}
$retryCount = 0; // current retry count
$waitTime = 0.0; // wait time in secs before current api call
$allowedWaitTime = self::$maximumRetryWaitTime; // remaining allowed wait time in seconds
$httpCode = null;
$headers = array();
do {
// If Retrying i.e. retryCount >= 1
if ($retryCount > 0) {
self::sleep($waitTime);
// calculate remaining allowed wait Time
$allowedWaitTime -= $waitTime;
}
// Execution of api call
$response = curl_exec(self::$handle);
$error = curl_error(self::$handle);
$info = self::getInfo();
if (!$error) {
$header_size = $info['header_size'];
$httpCode = $info['http_code'];
$headers = self::parseHeaders(substr($response, 0, $header_size));
}
if (self::shouldRetryRequest($method)) {
// calculate wait time for retry, and should not retry when wait time becomes 0
$waitTime = self::getRetryWaitTime($httpCode, $headers, $error, $allowedWaitTime, $retryCount);
$retryCount++;
}
} while ($waitTime > 0.0);
// reset request level retries check
self::$overrideRetryForNextRequest = OverrideRetry::USE_GLOBAL_SETTINGS;
if ($error) {
throw new Exception($error);
}
// get response body
$body = substr($response, $header_size);
self::$totalNumberOfConnections += curl_getinfo(self::$handle, CURLINFO_NUM_CONNECTS);
return new Response($httpCode, $body, $headers, self::$jsonOpts);
}
/**
* Halts program flow for given number of seconds, and microseconds
*
* @param $seconds float seconds with upto 6 decimal places, here decimal part will be converted into microseconds
*/
private static function sleep($seconds)
{
$secs = (int) $seconds;
// the fraction part of the $seconds will always be less than 1 sec, extracting micro seconds
$microSecs = (int) (($seconds - $secs) * 1000000);
sleep($secs);
usleep($microSecs);
}
/**
* Check if retries are enabled at global and request level,
* also check whitelisted httpMethods, if retries are only enabled globally.
*
* @param $method string|Method HttpMethod of request
* @return bool
*/
private static function shouldRetryRequest($method)
{
switch (self::$overrideRetryForNextRequest) {
case OverrideRetry::ENABLE_RETRY:
return self::$enableRetries;
case OverrideRetry::USE_GLOBAL_SETTINGS:
return self::$enableRetries && in_array($method, self::$httpMethodsToRetry);
case OverrideRetry::DISABLE_RETRY:
return false;
}
return false;
}
/**
* Generate calculated wait time, and 0.0 if api should not be retried
*
* @param $httpCode int Http status code in response
* @param $headers array Response headers
* @param $error string Error returned by server
* @param $allowedWaitTime int Remaining allowed wait time
* @param $retryCount int Attempt number
* @return float Wait time before sending the next apiCall
*/
private static function getRetryWaitTime($httpCode, $headers, $error, $allowedWaitTime, $retryCount)
{
$retryWaitTime = 0.0;
$retry_after = 0;
if ($error) {
$retry = self::$retryOnTimeout && curl_errno(self::$handle) == CURLE_OPERATION_TIMEDOUT;
} else {
// Successful apiCall with some status code or with Retry-After header
$headers_lower_keys = array_change_key_case($headers);
$retry_after_val = key_exists('retry-after', $headers_lower_keys) ?
$headers_lower_keys['retry-after'] : null;
$retry_after = self::getRetryAfterInSeconds($retry_after_val);
$retry = isset($retry_after_val) || in_array($httpCode, self::$httpStatusCodesToRetry);
}
// Calculate wait time only if max number of retries are not already attempted
if ($retry && $retryCount < self::$maxNumberOfRetries) {
// noise between 0 and 0.1 secs upto 6 decimal places
$noise = rand(0, 100000) / 1000000;
// calculate wait time with exponential backoff and noise in seconds
$waitTime = (self::$retryInterval * pow(self::$backoffFactor, $retryCount)) + $noise;
// select maximum of waitTime and retry_after
$waitTime = floatval(max($waitTime, $retry_after));
if ($waitTime <= $allowedWaitTime) {
// set retry wait time for next api call, only if its under allowed time
$retryWaitTime = $waitTime;
}
}
return $retryWaitTime;
}
/**
* Returns the number of seconds by extracting them from $retry-after header
*
* @param $retry_after mixed could be some numeric value in seconds, or it could be RFC1123
* formatted datetime string
* @return int Number of seconds specified by retry-after param
*/
private static function getRetryAfterInSeconds($retry_after)
{
if (isset($retry_after)) {
if (is_numeric($retry_after)) {
return (int)$retry_after; // if value is already in seconds
} else {
// if value is a date time string in format RFC1123
$retry_after_date = \DateTime::createFromFormat('D, d M Y H:i:s O', $retry_after);
// retry_after_date could either be undefined, or false, or a DateTime object (if valid format string)
return $retry_after_date == false ? 0 : $retry_after_date->getTimestamp() - time();
}
}
return 0;
}
/**
* if PECL_HTTP is not available use a fall back function
*
* thanks to ricardovermeltfoort@gmail.com
* http://php.net/manual/en/function.http-parse-headers.php#112986
* @param string $raw_headers raw headers
* @return array
*/
private static function parseHeaders($raw_headers)
{
if (function_exists('http_parse_headers')) {
return http_parse_headers($raw_headers);
} else {
$key = '';
$headers = array();
foreach (explode("\n", $raw_headers) as $i => $h) {
$h = explode(':', $h, 2);
if (isset($h[1])) {
if (!isset($headers[$h[0]])) {
$headers[$h[0]] = trim($h[1]);
} elseif (is_array($headers[$h[0]])) {
$headers[$h[0]] = array_merge($headers[$h[0]], array(trim($h[1])));
} else {
$headers[$h[0]] = array_merge(array($headers[$h[0]]), array(trim($h[1])));
}
$key = $h[0];
} else {
if (substr($h[0], 0, 1) == "\t") {
$headers[$key] .= "\r\n\t".trim($h[0]);
} elseif (!$key) {
$headers[0] = trim($h[0]);
}
}
}
return $headers;
}
}
public static function getInfo($opt = false)
{
if ($opt) {
$info = curl_getinfo(self::$handle, $opt);
} else {
$info = curl_getinfo(self::$handle);
}
return $info;
}
public static function getCurlHandle()
{
return self::$handle;
}
public static function getFormattedHeaders($headers)
{
$formattedHeaders = array();
$combinedHeaders = array_change_key_case(array_merge(self::$defaultHeaders, (array) $headers));
foreach ($combinedHeaders as $key => $val) {
$formattedHeaders[] = self::getHeaderString($key, $val);
}
if (!array_key_exists('user-agent', $combinedHeaders)) {
$formattedHeaders[] = 'user-agent: unirest-php/2.0';
}
if (!array_key_exists('expect', $combinedHeaders)) {
$formattedHeaders[] = 'expect:';
}
return $formattedHeaders;
}
/**
* Validates and processes the given Url to ensure safe usage with cURL.
* @param string $url The given Url to process
* @return string Pre-processed Url as string
* @throws Exception
*/
public static function validateUrl($url)
{
//perform parameter validation
if (!is_string($url)) {
throw new Exception('Invalid Url.');
}
//ensure that the urls are absolute
$matchCount = preg_match("#^(https?://[^/]+)#", $url, $matches);
if ($matchCount == 0) {
throw new Exception('Invalid Url format.');
}
//get the http protocol match
$protocol = $matches[1];
//remove redundant forward slashes
$query = substr($url, strlen($protocol));
$query = preg_replace("#//+#", "/", $query);
//return process url
return $protocol . $query;
}
private static function getHeaderString($key, $val)
{
$key = trim(strtolower($key));
return $key . ': ' . $val;
}
/**
* @param array $existing_options
* @param array $new_options
* @return array
*/
private static function mergeCurlOptions(&$existing_options, $new_options)
{
$existing_options = $new_options + $existing_options;
return $existing_options;
}
}