cURL 常用操作封装

原文地址：http://www.cnblogs.com/oshine/p/3895998.html
/**
* cURL 常用操作封装
*
* @author oShine
*/
class ExtendedCurl
{
/**
* 返回 JSON 内容为对象
*/
const JSON_OBJECT = 0;

/**
* 返回 JSON 内容为数组
*/
const JSON_ARRAY = 1;

/**
* cURL Handle
*
* @var resource
*/
private $curl;

/**
* 当前（默认） cURL 参数
*
* @var array
*/
private $options = array(
CURLOPT_FAILONERROR => false,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_FOLLOWLOCATION => 1,
CURLOPT_CONNECTTIMEOUT => 15,
CURLOPT_TIMEOUT => 60,
//CURLOPT_COOKIESESSION => 1,
);

/**
* 最后一次请求的错误信息
*
* @var null|string
*/
private $error = null;

/**
* @var int
*/
private $httpCode = null;

/**
* @param array $defaultOptions
* @internal param array $options 可选的覆盖默认 cURL 参数
*/
public function __construct(array $defaultOptions = array())
{
$this->curl = curl_init();
if (!empty($defaultOptions)) {
$this->options = $defaultOptions;
}
}

/**
* 设置 cURL 多个选项
*
* @param array $options
*/
public function setOptions(array $options)
{
foreach ($options as $key => $value) {
$this->setOption($key, $value);
}
}

/**
* 设置 cURL 单个选项
*
* @param $key
* @param $value
*/
public function setOption($key, $value)
{
$this->options[$key] = $value;
}

/**
* 发送 GET 请求并返回解析后的 JSON 内容
*
* @param $url
* @param array $data
* @param int $type
* @return null|object|array
*/
public function getJson($url, array $data = array(), $type = self::JSON_ARRAY)
{
$content = $this->get($url, $data);
return json_decode($content, $type);
}

/**
* 发送 GET 请求
*
* @param $url
* @param array $data
* @return null|string
*/
public function get($url, array $data = array())
{
if (!empty($data)) {
if (false === strpos($url, '?')) {
$url .= '?';
} else {
$url .= '&';
}
$url .= http_build_query($data);
}
$options = array(
CURLOPT_URL => $url,
);
return $this->request($options);
}

/**
* 发送 cURL 请求
*
* @param array $options
* @return mixed
*/
private function request(array $options = array())
{
$this->setOptions($options);
curl_setopt_array($this->curl, $this->options);
$result = curl_exec($this->curl);
$errorNo = curl_errno($this->curl);
$response = curl_getinfo( $this->curl );
if ($errorNo) {
$this->error = '[' . $errorNo . '] ' . curl_error($this->curl);
} else {
$this->error = null;
}
if(isset($response['http_code'])){
$this->httpCode = $response['http_code'];
}

return $result;
}

/**
* 发送 POST 请求并返回解析后的 JSON 内容
*
* @param $url
* @param array $data
* @param int $type
* @return null|object|array
*/
public function postJson($url, array $data = array(), $return = self::JSON_ARRAY)
{
$content = $this->post($url, $data);
return json_decode($content, $return);
}

/**
* 发送 POST 请求
*
* @param $url
* @param array $data
* @return null|string
*/
public function post($url, array $data = array())
{
$options = array(
CURLOPT_URL => $url,
CURLOPT_POST => 1,
);
if (!empty($data)) {
if ($this->isMultiPart($data)) {
$options[CURLOPT_POSTFIELDS] = $data;
} else {
$options[CURLOPT_POSTFIELDS] = http_build_query($data);
}
}
return $this->request($options);
}

private function isMultiPart($data)
{
foreach ($data as $value) {
if ('@' == $value[0])
return true;
}
return false;
}

/**
* 判断最后一次请求是否有错误
*
* @return bool
*/
public function hasError()
{
return null !== $this->error;
}

/**
* 获取最后一次请求的错误信息
*
* @return null|string
*/
public function getError()
{
return $this->error;
}

public function getHttpCode()
{
return $this->httpCode;
}
}