php怎樣調用phantomJS截圖

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php調用phantomJS截圖

• 知識儲備

*unix系統安裝phantomjs,權限相關知識

基本JavaScript語法知識

php exec函數調用REPL phantomjs

phantomjs js截圖文檔 http://javascript.ruanyifeng.com/tool/phantomjs.html

• 代碼(php 代碼環境為yii2框架)

<?php
namespace weapp\library\phantomjs;
use weapp\library\BizException;
class ScreenShot
{
    /** @var string 獲取phantomjs 參數中 js文件的決定路徑 */
    private $js_path;
    /** @var bool|string 獲取php 有777權限的臨時文件目錄 */
    private $temp_dir;
    function __construct()
    {
        $dir = __DIR__;
        $this->js_path = "{$dir}/script.js";
        /** @var bool|string 獲取php 有777權限的臨時文件目錄 */
        $this->temp_dir = \Yii::getAlias('@runtime');
    }
    /**
     * 截圖并上傳
     * @param string $url
     * @param string $filename
     * @return string
     * @throws BizException
     */
    public function screenShotThenSaveToOss(string $url, string $filename = 'temp.jpg')
    {
        //輸出圖片的路徑
        $outputFilePath = "{$this->temp_dir}/$filename";
        //執行的phantomjs命令
        //phantomjs 可執行文件必須是 絕對路徑 否則導致 exec 函數返回值127錯誤
        $cmd = "\usr\local\bin\phantomjs {$this->js_path} '$url' '$outputFilePath'";
        //捕捉不到phantomjs命令輸出結果
        exec($cmd, $output);
        //檢查截圖文件是否存在
        $isShotImgaeExist = file_exists($outputFilePath);
        if (!$isShotImgaeExist) {
            throw new BizException(0, 'phantomjs截圖失敗', BizException::SELF_DEFINE);
        }
        //保存截圖到oss
        $result = $this->postScreenShotImageToOss($outputFilePath);
        //刪除臨時文件夾的截圖圖片
        unlink($outputFilePath);
        return $result;
    }
    /**
     * 上傳截圖到阿里云直傳oss
     * @param string $screenshot_path
     * @return string
     */
    public function postScreenShotImageToOss(string $screenshot_path): string
    {
        $ossKey = 'raw_file_name';
        $file = new \CURLFile($screenshot_path, 'image/jpeg', 'file');
        $tokenArray = $this->getOssPolicyToken('fetch');
        $url = $tokenArray->host;
        $postData = [
            'key' => "{$tokenArray->dir}/$ossKey",
            'policy' => $tokenArray->policy,
            'OSSAccessKeyId' => $tokenArray->accessid,
            'success_action_status' => '200',
            'signature' => $tokenArray->signature,
            'callback' => $tokenArray->callback,
            'file' => $file
        ];
        $ch = curl_init();
        //$data = array('name' => 'Foo', 'file' => '@/home/user/test.png');
        curl_setopt($ch, CURLOPT_URL, $url);
        // Disable SSL verification
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_SAFE_UPLOAD, true); // required as of PHP 5.6.0
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_TIMEOUT, 20);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);
        //curl_setopt($ch, CURLOPT_HTTPHEADER, ["Content-Type: $mime_type"]);
        $res = curl_exec($ch);
        $res = json_decode($res);
        curl_close($ch);
        if (empty($res) || $res->code != 0) {
            return '';
        } else {
            return $res->data->url;
        }
    }
    /**
     * 調用管理后臺阿里云oss token接口
     * @param null $url
     * @return array
     */
    public function getOssPolicyToken($url = null)
    {
        $url = \Yii::$app->params['oss_screen_shot_token_api'];
        $ch = curl_init();
        // Disable SSL verification
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        // Will return the response, if false it print the response
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        // Set the url
        curl_setopt($ch, CURLOPT_URL, $url);
        // Execute
        $result = curl_exec($ch);
        // Closing
        curl_close($ch);
        $res = json_decode($result);
        if (empty($res) || $res->code != 0) {
            return [];
        } else {
            return $res->data;
        }
    }
}
phantomjs javascript腳本內容
"use strict";
var system = require('system');
var webPage = require('webpage');
var page = webPage.create();
//設置phantomjs的瀏覽器user-agent
page.settings.userAgent = 'Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/604.1.38 (KHTML, like Gecko) Version/11.0 Mobile/15A372 Safari/604.1';
//獲取php exec 函數的命令行參數
if (system.args.length !== 3) {
    console.log(system.args);
    console.log('參數錯誤');
    console.log('第2個參數為url地址 第3個參數為截圖文件名稱');
    phantom.exit(1);
}
//命令行 截圖網址參數
var url = system.args[1];
//圖片輸出路徑
var filePath = system.args[2];
console.log('-------');
console.log(url);
console.log('-------');
console.log(filePath);
console.log('-------');
//設置瀏覽器視口
page.viewportSize = {width: 480, height: 960};
//打開網址
page.open(url, function start(status) {
    //1000ms之后開始截圖
    setTimeout(function () {
        //截圖格式為jpg 80%的圖片質量
        page.render(filePath, {format: 'jpg', quality: '80'});
        console.log('success');
        //退出phantomjs 避免phantomjs導致內存泄露
        phantom.exit();
    }, 1000);
});

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