第八天

话说小帅帅自从走进了淘宝开放平台这个迷雾森林，感觉这迷雾森林好大，正当他无所适从的时候。

一位悦耳动听的声音响起来了，甜甜的声音说道：亲，想通过这片森林吗，我将指引你前进。

小帅帅一听，那种感觉，身体不由自主的跟随这声音而去，突然一道强光闪过，啊.....

小帅帅惊醒了。小帅帅一看时间，我滴个天，这么晚了。就这样小帅帅从业一来第一次迟到。

其实小帅帅在平台里面琢磨了一个晚上，整个晚上其实也没琢磨个啥出来。

正当要到公司的时候，手机的铃声响起来了，一看是于老大的电话，接通电话。

于老大问候到：小帅帅，早啊， 你什么时候到公司丫。

小帅帅答到： 于老大，不好意思丫，昨天晚上研究那个淘宝开放平台，研究太玩了，今早睡过头了。不过我快到公司了....

于老大一听，不好意思责怪小帅帅啥，只好说道：辛苦你了，注意休息，学会劳逸结合...

小帅帅，回到： 好的，谢谢于老大的教诲，没事就挂了哈。。（ 0害怕于老大的糖衣炮弹0 ）

小帅帅回到公司后，于老大就给了一份整理后的Topclient给小帅帅，让他去研究下，看样子小帅帅还是乐于研究代码，让他看开放平台，还真看不出什么。

淘宝宝贝API文档：http://open.taobao.com/api/api_cat_detail.htm?spm=a219a.7386789.0.0.AjaroV&cat_id=4&category_id=102

Topclient来自Taobao SDK ，只是稍微修正，去掉了一些框架的依赖，源码为：

<?phpclass TopClient{    public $appkey;    public $secretKey;    public $gatewayUrl = "http://gw.api.taobao.com/router/rest";    public $format = "json";    /** 是否打开入参check**/    public $checkRequest = true;    PRotected $signMethod = "md5";    protected $apiVersion = "2.0";    protected $sdkVersion = "top-sdk-php-20110929";    protected function generateSign($params)    {        ksort($params);        $stringToBeSigned = $this->secretKey;        foreach ($params as $k => $v) {            if ("@" != substr($v, 0, 1)) {                $stringToBeSigned .= "$k$v";            }        }        unset($k, $v);        $stringToBeSigned .= $this->secretKey;        return strtoupper(md5($stringToBeSigned));    }    protected function curl($url, $postFields = null)    {        $ch = curl_init();        curl_setopt($ch, CURLOPT_URL, $url);        curl_setopt($ch, CURLOPT_FAILONERROR, false);        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 15);        curl_setopt($ch, CURLOPT_TIMEOUT, 300);        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);        if (is_array($postFields) && 0 < count($postFields)) {            $postBodyString = "";            $postMultipart = false;            foreach ($postFields as $k => $v) {                if ("@" != substr($v, 0, 1)) //判断是不是文件上传                {                    $postBodyString .= "$k=" . urlencode($v) . "&";                } else //文件上传用multipart/form-data，否则用www-form-urlencoded                {                    $postMultipart = true;                }            }            unset($k, $v);            curl_setopt($ch, CURLOPT_POST, true);            if ($postMultipart) {                curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields);            } else {                curl_setopt($ch, CURLOPT_POSTFIELDS, substr($postBodyString, 0, -1));            }        }        $reponse = curl_exec($ch);        if (curl_errno($ch)) {            throw new Exception(curl_error($ch), 0);        } else {            $httpStatusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);            if (200 !== $httpStatusCode) {                throw new Exception($reponse, $httpStatusCode);            }        }        curl_close($ch);        return $reponse;    }    protected function logCommunicationError($apiName, $requestUrl, $errorCode, $responseTxt)    {        $localIp = isset($_SERVER["SERVER_ADDR"]) ? $_SERVER["SERVER_ADDR"] : "CLI";        $logData = "NAME:$apiName,KEY:$this->appkey,IP:$localIp,URL:$requestUrl,CODE:$errorCode,MSG:" . str_replace("\n", "", $responseTxt);        $file = fopen('taobao.api.error.log','a+');        fwrite($file,$logData);        fclose($file);    }    public function execute($request, $session = null, $need_replace = false)    {        if ($this->checkRequest) {            try {                $request->check();            } catch (Exception $e) {                $result = new stdClass();                $result->code = $e->getCode();                $result->msg = $e->getMessage();                return $result;            }        }        //组装系统参数        $sysParams["v"] = $this->apiVersion;        $sysParams["format"] = $this->format;        $sysParams["method"] = $request->getApiMethodName();        $sysParams["app_key"] = $this->appkey;        $sysParams["timestamp"] = date("Y-m-d H:i:s");        $sysParams["partner_id"] = $this->sdkVersion;        $sysParams["sign_method"] = $this->signMethod;        if (null != $session) {            $sysParams["session"] = $session;        }        //获取业务参数        $apiParams = $request->getApiParas();        //签名        $sysParams["sign"] = $this->generateSign(array_merge($apiParams, $sysParams));        //系统参数放入GET请求串        $requestUrl = $this->gatewayUrl . "?";        foreach ($sysParams as $sysParamKey => $sysParamValue) {            $requestUrl .= "$sysParamKey=" . urlencode($sysParamValue) . "&";        }        $requestUrl = substr($requestUrl, 0, -1);        //发起HTTP请求        try {            $resp = $this->curl($requestUrl, $apiParams);        } catch (Exception $e) {            $this->logCommunicationError($sysParams["method"], $requestUrl, "HTTP_ERROR_" . $e->getCode(), 'RETRY:' . $e->getMessage());            $result = new stdClass();            $result->code = $e->getCode();            $result->msg = $e->getMessage();            return $result;        }        //解析TOP返回结果        $respWellFormed = false;        if ("json" == $this->format) {            if ($need_replace) {                $resp = preg_replace('/[\r\n]+/', '', $resp);            }            $respObject = json_decode($resp);            if (null !== $respObject) {                $respWellFormed = true;                foreach ($respObject as $propKey => $propValue) {                    $respObject = $propValue;                }            }        } else if ("xml" == $this->format) {            $respObject = @simplexml_load_string($resp);            if (false !== $respObject) {                $respWellFormed = true;            }        }        //返回的HTTP文本不是标准JSON或者XML，记下错误日志        if (false === $respWellFormed) {            $this->logCommunicationError($sysParams["method"], $requestUrl, "HTTP_RESPONSE_NOT_WELL_FORMED", $resp);            $result = new stdClass();            $result->code = 0;            $result->msg = "HTTP_RESPONSE_NOT_WELL_FORMED";            return $result;        }        return $respObject;    }}

淘宝宝贝请求类：

<?php/** * TOP API: taobao.item.get request * * @author auto create * @since 1.0, 2011-09-29 15:36:21 */class ItemGetRequest{    /**     * 需要返回的商品对象字段。可选值：Item商品结构体中所有字段均可返回；多个字段用“,”分隔。如果想返回整个子对象，那字段为item_img，如果是想返回子对象里面的字段，那字段为item_img.url。新增返回字段：second_kill（是否秒杀商品）、auto_fill（代充商品类型）,props_name（商品属性名称）     **/    private $fields;    /**     * 商品数字ID     **/    private $numIid;    private $apiParas = array();    public function setFields($fields)    {        $this->fields = $fields;        $this->apiParas["fields"] = $fields;    }    public function getFields()    {        return $this->fields;    }    public function setNumIid($numIid)    {        $this->numIid = $numIid;        $this->apiParas["num_iid"] = $numIid;    }    public function getNumIid()    {        return $this->numIid;    }    public function getApiMethodName()    {        return "taobao.item.get";    }    public function getApiParas()    {        return $this->apiParas;    }    public function check()    {        RequestCheckUtil::checkNotNull($this->fields, "fields");        RequestCheckUtil::checkNotNull($this->numIid, "numIid");        RequestCheckUtil::checkMinValue($this->numIid, 1, "numIid");    }}

数据完整性检测类

<?php/** * API入参静态检查类 * 可以对API的参数类型、长度、最大值等进行校验 * **/class RequestCheckUtil{    /**     * 校验字段 fieldName 的值$value非空     *     **/    public static function checkNotNull($value,$fieldName) {                if(self::checkEmpty($value)){            throw new Exception("client-check-error:Missing Required Arguments: " .$fieldName , 40);        }    }    /**     * 检验字段fieldName的值value 的长度     *     **/    public static function checkMaxLength($value,$maxLength,$fieldName){                if(!self::checkEmpty($value) && strlen($value) > $maxLength){            thr