[程式][PHP] Google 縮址short url library，for CodeIgniter 的library @ 四處流浪的阿基。I am Vagrant Walker

基本上這是因為工作需要寫的一個Lib.

他可以通用PHP CodeIgniter (CI) 用，但是一般的PHP沒用CI的應該也可以拿去用。

主要是 create_short_url 這個 function。

把你的網址傳進去，就會回傳短網址。

唯一有改良的是。因為google回傳的訊息不固定。所以我又用了一個固定的格式去回傳。

$google_short_return["google_status"] =>狀態只有 success 才是成功，期他的都是錯誤
$google_short_return["google_status_desc"] =>看google回什麼我就直接傳
$google_short_return["google_short_url"] =>只有在狀態成功才會有值

<?php

/**
* Description of Google_Short_Url_Lib
*
* @author Achi Li
*/
class Google_Short_Url_Lib {

    //put your code here
    private $api_url, $api_key, $max_retry;
    private $CI;

//
public function __construct() {

        $this->api_url = "https://www.googleapis.com/urlshortener/v1/url";
        $this->api_key = "APP KEY請自行到google 免費申請";
        $this->max_retry = 5;
    }

    public function get_api_url() {
        return $this->api_url;
    }

    public function get_api_key() {
        return $this->api_key;
    }

public function create_short_url($long_url) {

        for ($i = 0; $i < $this->max_retry; $i++) {
            $curl_result = $this->curl_short_url($long_url);
            $web_info = json_decode($curl_result["web_info"], TRUE);
            if (isset($web_info["error"])) {
                sleep(2);
            } else {
                $i = $this->max_retry;
            }
        }
        $google_short_return = array();
        $google_short_return["api_url"] = $curl_result["url"];
        $google_short_return["http_status"] = $curl_result["http_status"];
        $google_short_return["curl_error_no"] = $curl_result["curl_error_no"];
        $web_info = json_decode($curl_result["web_info"], TRUE);
        if (isset($web_info["error"])) {
            $google_short_return["google_status"] = "error";
            $google_short_return["google_status_desc"] = $web_info["error"]["errors"][0]["message"];
            $google_short_return["google_short_url"] = "";
        } else {
            $google_short_return["google_status"] = "success";
            $google_short_return["google_status_desc"] = "success";
            $google_short_return["google_short_url"] = $web_info["id"];
        }
        return $google_short_return;
    }

public function curl_short_url($long_url) {
$apiKey = $this->get_api_key();

$postData = array('longUrl' => $long_url, 'key' => $apiKey);
$jsonData = json_encode($postData);

        $curlObj = curl_init();
        $api_url = $this->get_api_url() . "?key=" . $apiKey;
        curl_setopt($curlObj, CURLOPT_URL, $api_url);
        curl_setopt($curlObj, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curlObj, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($curlObj, CURLOPT_HEADER, 0);
        curl_setopt($curlObj, CURLOPT_HTTPHEADER, array('Content-type:application/json'));
        curl_setopt($curlObj, CURLOPT_POST, 1);
        curl_setopt($curlObj, CURLOPT_POSTFIELDS, $jsonData);
        $result = curl_exec($curlObj);
        $retcode = curl_getinfo($curlObj, CURLINFO_HTTP_CODE);
        $curl_error = curl_errno($curlObj);

curl_close($curlObj);

        $return_info = array(
            "url" => $api_url,
            "http_status" => $retcode,
            "curl_error_no" => $curl_error,
            "web_info" => str_replace("\xef\xbb\xbf", "", $result)
        );
        return $return_info;
    }

}