由于php的curl在curl_setopt($curl, CURLOPT_POSTFIELDS, xxx)时, 当xxx为数组时, 如果值的第一个字符是@, 则认为是文件上传, 当同时需要上传文件, 也需要提交可能首字符为@的其他普通数据时, 存在冲突. 因此, 在api_common.php中的post数据的设置进行了封装

<?php
/**
 * php-curl库封装
 * author: selfimpr
 * blog: http://blog.csdn.net/lgg201
 * mail: lgg860911@yahoo.com.cn
 */

define('API_CURL_UPLOAD_FILE',							'__file');

#支持的请求方法
define('REQUEST_METHOD_GET',							'GET');
define('REQUEST_METHOD_POST',							'POST');
define('REQUEST_METHOD_HEAD',							'HEAD');

#请求行为
define('REQUEST_BEHAVIOR_ALLOW_REDIRECT',				'allow_redirect');
define('REQUEST_BEHAVIOR_MAX_REDIRECT',					'max_redirect');
define('REQUEST_BEHAVIOR_USER_AGENT',					'user_agent');
define('REQUEST_BEHAVIOR_AUTOREFERER',					'autoreferer');
define('REQUEST_BEHAVIOR_UPLOAD',						'upload');
define('REQUEST_BEHAVIOR_CONNECTTIMEOUT',				'connecttimeout');
define('REQUEST_BEHAVIOR_DNS_CACHE_TIMEOUT',			'dns_cache_timeout');
define('REQUEST_BEHAVIOR_TIMEOUT',						'timeout');
define('REQUEST_BEHAVIOR_ENCODING',						'encoding');
define('REQUEST_BEHAVIOR_ERROR_HANDLER',				'error_handler');
define('REQUEST_BEHAVIORS',								'behaviors');
$GLOBALS[REQUEST_BEHAVIORS]	= array(
	REQUEST_BEHAVIOR_ALLOW_REDIRECT				=> TRUE, 
	REQUEST_BEHAVIOR_MAX_REDIRECT				=> 5, 
	REQUEST_BEHAVIOR_USER_AGENT					=> 'curl-lib', 
	REQUEST_BEHAVIOR_AUTOREFERER				=> TRUE, 
	REQUEST_BEHAVIOR_UPLOAD						=> FALSE, 
	REQUEST_BEHAVIOR_CONNECTTIMEOUT				=> 3, 
	REQUEST_BEHAVIOR_DNS_CACHE_TIMEOUT			=> 3600, 
	REQUEST_BEHAVIOR_TIMEOUT					=> 3, 
	REQUEST_BEHAVIOR_ENCODING					=> 'gzip', 
	REQUEST_BEHAVIOR_ERROR_HANDLER				=> '__default_curl_error_handler', 
);

define('MULTIPART_FORM_DATA_HEAD_FMT',				'Content-Type: multipart/form-data; boundary=----------------------------%s');
define('MULTIPART_FORM_DATA_BODY_STRING',			"------------------------------%s\r\nContent-Disposition: form-data; name=\"%s\"\r\n\r\n%s\r\n");
define('MULTIPART_FORM_DATA_BODY_FILE',				"------------------------------%s\r\nContent-Disposition: form-data; name=\"%s\"; filename=\"%s\"\r\nContent-Type: application/octet-stream\r\n\r\n%s\r\n");
define('MULTIPART_FORM_DATA_BODY_END',				"------------------------------%s--\r\n\r\n");

#响应键值
define('RESP_CODE',									'resp_code');
define('RESP_BODY',									'resp_body');
define('RESP_HEADER',								'resp_header');

#HTTP 1xx状态验证
define('HTTP_1XX_RESP',								'/^HTTP\/1.[01] 1\d{2} \w+/');

#默认错误处理的错误消息
define('E_CURL_ERROR_FMT',								'curl "%s" error[%d]: %s');

#默认的curl错误处理
function __default_curl_error_handler($curl, $url, $errno, $errstr) {
	trigger_error(sprintf(E_CURL_ERROR_FMT, $url, $errno, $errstr), E_USER_ERROR);
}
#切换CURL请求方法
function __method_switch($curl, $method) {
	switch ( $method) {
		case REQUEST_METHOD_POST:
			__curl_setopt($curl, CURLOPT_POST, TRUE);
			break;
		case REQUEST_METHOD_HEAD:
			__curl_setopt($curl, CURLOPT_NOBODY, TRUE);
			break;
		case REQUEST_METHOD_GET:
			__curl_setopt($curl, CURLOPT_HTTPGET, TRUE);
			break;
		default:
			break;
	}
}
#设置默认头信息
function __default_header_set($curl) {
	__curl_setopt($curl, CURLOPT_RETURNTRANSFER,			TRUE);
	__curl_setopt($curl, CURLOPT_HEADER,					TRUE);
	__curl_setopt($curl, CURLOPT_FOLLOWLOCATION,			(bool)curl_behavior(REQUEST_BEHAVIOR_ALLOW_REDIRECT));
	__curl_setopt($curl, CURLOPT_MAXREDIRS,					(int)curl_behavior(REQUEST_BEHAVIOR_MAX_REDIRECT));
	__curl_setopt($curl, CURLOPT_USERAGENT,					(string)curl_behavior(REQUEST_BEHAVIOR_USER_AGENT));
	__curl_setopt($curl, CURLOPT_AUTOREFERER,				(bool)c