xiaoben-as2-php/protected/controllers/SpecialController.php

<?php
/**
 *
 * 专题宝
 *
 */

class SpecialController extends Controller
{
    //产品内容 关联方法配置id
    const METHOD_CONFIG_ID_TEST = 276;
    //const METHOD_CONFIG_ID_TEST = 303;
    const METHOD_CONFIG_ID_PROD = 276;

    /**
     * 产品列表
     */
    public function actionIndex()
    {
        Url::clean();
        $data = array();
        $printName = Req::get("name");
        $classId = Req::get("classId");

        $newCondition=array();
        $newCondition[] = 'g.product_type=' . ProductDownload::PRODUCT_TYPE_SPECIAL;

        if ($printName) {
            $newCondition[] = 'p.name like "%' . $printName . '%"';
        }
        if ($classId) {
            $newCondition[] = 'p.class_id=' . $classId;
        }

        $newCondition[] = "p.semester_id = '{$this->semesterId}'";
        $magicWordModel = new SGeneralProductSetting();
        $resultList = $magicWordModel->getList($newCondition, array('p.create_time desc'), 9);
        $printList = array();
        if ($resultList["rs"]) {
            foreach ($resultList['rs'] as $k => $v) {
                $printList[$k] = $v;
                $printList[$k]['is_cloud_print'] = Yii::app()->cache->getValue(sprintf("cloud_print_task:general_product:%s:%s:%s", $this->schoolId,$v['class_id'],$v['gp_id']));
            }
        }
        $type = ProductDownload::PRODUCT_TYPE_SPECIAL;
        $productDesc = ProductDownload::$desc;
        $desc = isset($productDesc[$type]) ? $productDesc[$type]: "";

        $classes = $this->schoolManager->getClasses(3);
        $data['pages'] = $resultList['pager'];
        $data['page_total'] = $resultList['pager']->rowsCount;
        $data['printList'] = $printList;
        $data["printName"] = $printName;
        $data["classes"] = $classes;
        $data["classId"] = $classId;
        $data["grade"] = 3;
        $data['printType'] = 'special';
        $data['subjectId'] = $this->subjectId;
        $data['desc'] = $desc;
        $data['type'] = $type;
//        debug($printList);
        $this->render('index', $data);
    }

    /**
     * 学生列表
     */
    public function actionStu()
    {
        $data = array();
        $sname = (string)Req::get("sname"); //学生名字
        $gpId = (string)Req::get("gp_id");
        if (!$gpId) {
            Yii::app()->jump->error('参数错误！');
        }
        //获取班级名称以及产品名称
        $sql = "select g.name,c.class_name,g.class_id,g.create_time,g.semester_id from general_product g join class c on g.class_id = c.class_id where g.gp_id = '{$gpId}'";
        $names = $this->sConn->createCommand($sql)->queryRow();
        if (empty($names)) {
            Yii::app()->jump->error('数据错误！');
        }
        $names['grade'] = 3;

        $data['name'] = isset($names['name']) && isset($names['class_name']) ? $names['class_name'] . $names['name'] : '';

        $sql = "select student_id,is_create_pdf from general_product_student where gp_id = '{$gpId}'";
        $relateStudent = $this->sConn->createCommand($sql)->queryAll();
        $studentIds = array();
        $stuIsPdf = array();
        if ($relateStudent) {
            foreach ($relateStudent as $studentInfo) {
                $studentIds[] = (string)$studentInfo['student_id'];
                $stuIsPdf[(string)$studentInfo['student_id']] = $studentInfo['is_create_pdf'];
            }
        }
        if ($studentIds) {
            $studentNames = SStudentInfo::model()->getStudentNames($studentIds); //求学生名字
            if ($studentNames) {
                if ($sname) {
                    $i = 1;
                    foreach ($studentNames as $k => $v) {
                        if (strpos($v, $sname) !== false) {
                            $data['list'][$i]['stu_id'] = (string)$k;
                            $data['list'][$i]['stu_name'] = $v;
                            $data['list'][$i]['name'] = $names['class_name'] . $v . $names['name'];
                            $data['list'][$i]['is_pdf'] = isset($stuIsPdf[(string)$k]) ? $stuIsPdf[(string)$k] : 0;
                            $i++;
                        }
                    }
                } else {
                    $i = 1;
                    foreach ($studentNames as $k => $v) {
                        $data['list'][$i]['stu_id'] = (string)$k;
                        $data['list'][$i]['stu_name'] = $v;
                        $data['list'][$i]['name'] = $names['class_name'] . $v . $names['name'];
                        $data['list'][$i]['is_pdf'] = isset($stuIsPdf[(string)$k]) ? $stuIsPdf[(string)$k] : 0;
                        $i++;
                    }
                }
            }
        }
        $Sem = new SSemester();
        $code = $Sem->conn->createQuery()
            ->from('semester')
            ->where("semester_id = '" . $names['semester_id'] . "'")
            ->limit(1)
            ->query()
            ->read();
        $intarr = array(
            "schoolId" => $this->schoolId,
            "clazzId" => $names['class_id'],
            "semester" => $code['refer_code'],
            "grade" => $names['grade'],
            "students" => $studentIds,
            "examTime" => $names['create_time'],
            "classify" => 31,
            "subject" => 3
        );
        $basic = imsBasicAuth($this->schoolId . '_' . Yii::app()->session['coachInfo']['coach_name'], Yii::app()->params["zsy_api_key"]);

        $rs = json_decode(Curl::http_post_Basic_json(Yii::app()->params["get_limit_url"], json_encode($intarr), $basic));

        if (!$rs) {
            Yii::app()->jump->error("接口错误");
        }
        if ($rs->errCode != "00") {
            Yii::app()->jump->error($rs->errMsg);
        }
        if (!empty($rs->data)) {
            $data['limitstu'] = $rs->data;
        }
        $data['gp_id'] = $gpId;
        $data['class_id'] = $names['class_id'];
        $data['sname'] = $sname;
        $data['type'] = ProductDownload::PRODUCT_TYPE_SPECIAL;
        $data['printType'] = 'general_product';

        $this->render('stu', $data);
    }

    /**
     * 专题宝设置
     */
    public function actionSetting()
    {
        $rs = $this->apiPost('/product/studentProductMenu', array(
            'product_id' => 17
        ));

        if ($rs->status != 1 && !empty($rs->error)) {
            Yii::app()->jump->error($rs->error);
        }
        //顶级节点即专题数据
        $data = array();
        if ($rs->data) {
            $data['topNode'] = $rs->data;
        } else {
            Yii::app()->jump->error('brain接口异常！');
        }

        $this->render('setting', $data);
    }

    //获取专题下讲列表和试卷列表
    public function actionAjaxSpecialChild()
    {
        $pcId = (string)Req::post("pc_id");
        if (!$pcId) {
            Yii::app()->jump->error('参数错误！');
        }
        $rs = $this->apiPost('/product/studentProductMenu', array(
            'product_id' => 17
        ));

        if ($rs->status != 1 && !empty($rs->error)) {
            echo json_encode(array("status" => 0, "message" => $rs->error));
            exit();
        }

        $lectureList = array();
        if ($rs->data) {
            foreach ($rs->data as $item) {
                if ($item->pc_id == $pcId) {
                    $lectureList = $item->child;
                }
            }
        }

        $paper = $this->apiPost('/all_content/detail', array(
            'catalogIds' => array($pcId)
        ));
        if ($paper->status != 1 && !empty($paper->error)) {
            echo json_encode(array("status" => 0, "message" => $paper->error));
            exit();
        }
        $paperList = array();
        if($paper->data) {
            foreach ($paper->data as $item){
                if($item->paper_id){
                    array_push($paperList,array('paper_id'=>$item->paper_id,'paper_name'=>isset($item->paper_name)?$item->paper_name:"试卷".$item->paper_id));
                }
            }
        }

        echo json_encode(array('status' => 1, 'data' => array('lectureList' => $lectureList,'paperList'=>$paperList)));
        exit;
    }

    //获取每一讲下面方法列表
    public function actionAjaxMethod()
    {
        $pcId = (string)Req::post("pc_id");
        if (!$pcId) {
            Yii::app()->jump->error('参数错误！');
        }
        $rs = $this->apiPost('/all_content/detail', array(
            'catalogIds' => array($pcId)
        ));
        if ($rs->status != 1 && !empty($rs->error)) {
            echo json_encode(array("status" => 0, "message" => $rs->error));
            exit();
        }
        $methodConfigId = YII_ENV == 'pro' || YII_ENV == 'production' ? self::METHOD_CONFIG_ID_PROD : self::METHOD_CONFIG_ID_TEST;
        $methodList = array();
        if ($rs->data) {
            foreach ($rs->data as $item) {
                if ($item->column_id == $methodConfigId) {
                    array_push($methodList, array('method_id' => $item->tag_extend_id, 'method_name' => $item->tag_extend_name));
                }
            }
        }

        echo json_encode(array('status' => 1, 'data' => array('methodList' => $methodList)));
        exit;
    }

    private function getMethodList($pcId){
        $rs = $this->apiPost('/all_content/detail', array(
            'catalogIds' => array($pcId)
        ));
        if ($rs->status != 1 && !empty($rs->error)) {
            echo json_encode(array("status" => 0, "message" => $rs->error));
            exit();
        }
        $methodConfigId = YII_ENV == 'pro' || YII_ENV == 'production' ? self::METHOD_CONFIG_ID_PROD : self::METHOD_CONFIG_ID_TEST;
        $methodList = array();
        if ($rs->data) {
            foreach ($rs->data as $item) {
                if ($item->column_id == $methodConfigId) {
                    array_push($methodList, array('method_id' => $item->tag_extend_id, 'method_name' => $item->tag_extend_name));
                }
            }
        }
        return $methodList;
    }

    /**
     * 生成设置保存
     */
    public function actionAjaxSaveSetting()
    {
        $error = array();

        if (!Yii::app()->request->isAjaxRequest OR !Yii::app()->request->isPostRequest) {
            $error[] = '错误的来源！';
        } else {
            $grade = (int)Req::post('grade');
            $unitIds = (array)Req::post('unitIds');
            $specialIds = (array)Req::post('specialIds');
            $createType = (int)Req::post('createType');
            $isAnswerMerge = (int)Req::post('isAnswerMerge');
            //$trainPushType = (int)Req::post('trainPushType');
            $classIds = (array)Req::post('selectClassIds');
            $names = (array)Req::post('names');
            $specialNames = (array)Req::post('specialNames');
            $specialNodeId = 0;
            $paperIds = (array)Req::post('paperIds');
            $paperNames = (array)Req::post('paperNames');

            $pcIds = array();

            $existMethodIds = array();
            if ($createType == 1) {
                foreach ($specialIds as $key => $specialId) {
                    $specialNodeId = $specialId;
                    //array_push($pcIds, array('pc_id' => $specialId, 'pc_name' => $specialNames[$key], 'parent_id' => 0, 'children' => array()));
                    $rs = $this->apiPost('/product/studentProductMenu', array(
                        'product_id' => 17
                    ));
                    //专题下的讲列表
                    if ($rs->data) {
                        foreach ($rs->data as $item) {
                            if ($item->pc_id == $specialId) {
                                $lectureList = $item->child;
                                if($lectureList) {
                                    foreach ($lectureList as $lecture) {
                                        $methodList = $this->getMethodList($lecture->pc_id);
                                        $_methodIds = _array_column($methodList,'method_id');
                                        $methodIds = array();
                                        foreach ($_methodIds as $_methodId){
                                            if(!in_array($_methodId,$existMethodIds)){
                                                $methodIds[] = $_methodId;
                                                array_push($existMethodIds,$_methodId);
                                            }
                                        }

                                        $pcItem = array('pc_id' => $specialId, 'pc_name' => $specialNames[$key], 'parent_id' => 0, 'children' => array(
                                            'pc_id' => $lecture->pc_id, 'pc_name' => $lecture->pc_name, 'parent_id' => $specialId, 'method_ids' => $methodIds
                                        ));
                                        array_push($pcIds, $pcItem);
                                    }
                                }
                            }
                        }
                    }
                    //专题下所有试卷 FIXME 220104
                    $paper = $this->apiPost('/all_content/detail', array(
                        'catalogIds' => array($specialId)
                    ));
                    if ($paper->status != 1 && !empty($paper->error)) {
                        echo json_encode(array("status" => 0, "message" => $paper->error));
                        exit();
                    }
                    if($paper->data) {
                        foreach ($paper->data as $item){
                            if($item->paper_id){
                                array_push($paperIds, $item->paper_id);
                            }
                        }
                    }

                }
                if (count($specialIds) > 1) {
                    echo json_encode(array('status' => 0, 'error' => '专题选择超出限制'));
                    exit;
                }
            } else {
                $lectures = array();
                $pcIds = array();
                $specialID = array();
                $pcArr = array();
                foreach ($unitIds as $key => $unitId) {

                    $ids = explode('_', $unitId);
                    $specialID[$ids[0]] = $ids[0];
                    $specialNodeId = $ids[0];
                    $nameArr = explode('_', $names[$key]);
                    $lectures[$ids[0]][$ids[1]]['pc_id'] = $ids[1];
                    $lectures[$ids[0]][$ids[1]]['pc_name'] = $nameArr[1];
                    $lectures[$ids[0]][$ids[1]]['parent_id'] = $ids[0];
                    if(!isset($lectures[$ids[0]][$ids[1]]['method_ids'])){
                        $lectures[$ids[0]][$ids[1]]['method_ids'] = array();
                    }
                    if(!in_array($ids[2],$existMethodIds)){
                        $lectures[$ids[0]][$ids[1]]['method_ids'][] = $ids[2];
                        array_push($existMethodIds,$ids[2]);
                    }

                    $specialNames[] = $nameArr[0];
                    $pcArr = array('pc_id' => $ids[0], 'pc_name' => $nameArr[0], 'parent_id' => 0);
                }
                if (count($specialID) > 1) {
                    echo json_encode(array('status' => 0, 'error' => '专题选择超出限制'));
                    exit;
                }
                foreach ($lectures as $key=>$lecture){
                    foreach ($lecture as $item){

                        $pcArr['children'] = $item;
                        array_push($pcIds, $pcArr);
                    }
                }

            }

            if($createType==1 && empty($pcIds)){
                echo json_encode(array('status'=>0, 'error'=> '专题内容无数据！'));exit;
            }

            $limit = SGeneralProductSetting::model()->classHistory($specialNodeId, 29, implode(',',$classIds));
            if($limit){
                echo json_encode(array('status'=>0, 'error'=> implode(',',$limit).'该专题生成次数超出限制'));exit;
            }

            $setting = array(
                'product_id' => 17,
                'pc_ids' => empty($pcIds) ? array(array("pc_id"=>$specialIds[0],"pc_name"=>$specialNames[0],"parent_id"=>0,"children"=>null)) : $pcIds,
                'paper_ids' => $paperIds,   //TODO 试卷
                'create_type' => $createType,
                'is_answer_merge' => $isAnswerMerge ? false : true,
                //'train_push_type' => $trainPushType,
            );
            $time = time();
            $transaction = $this->sConn->beginTransaction();

            try {
                $groupId = getUniqueId($this->schoolId);

                $strModel = new SStudentClassRelation();

                $this->sConn->createCommand()->insert('general_product_setting', array(
                    'gp_group_id' => $groupId,
                    'grade' => $grade,
                    'product_type' => 29,
                    'subject_id' => $this->subjectId,
                    'semester_id' => $this->semesterId,
                    'setting' => json_encode($setting, true),
                    'create_time' => $time,
                    'update_time' => $time,
                ));

                $gpIds = array();
                foreach ($classIds as $classId) {
                    $gpId = getUniqueId($this->schoolId);

                    $this->sConn->createCommand()->insert('general_product', array(
                        'gp_id' => $gpId,
                        'gp_group_id' => $groupId,
                        'class_id' => $classId,
                        'grade' => 3,
                        'name' => $specialNames ? implode(',',array_unique($specialNames)).date('YmdHis',$time) : implode(',',array_unique($paperNames)).date('YmdHis',$time),
                        'subject_id' => $this->subjectId,
                        'semester_id' => $this->semesterId,
                        'create_time' => $time,
                        'update_time' => $time,
                    ));

                    //获取班级学生
                    $stuData = $strModel->getRelationsByClassId_Status_0($classId);
                    foreach ($stuData as $kk => $vv) {
                        $this->sConn->createCommand()->insert('general_product_student', array(
                            'gp_id' => $gpId,
                            'student_id' => $vv['student_id'],
                        ));
                    }
                    //插入一条学生id为0的作为教师产品
                    $this->sConn->createCommand()->insert('general_product_student', array(
                        'gp_id' => $gpId,
                        'student_id' => 0,
                        'is_teaching_pdf' => 1,
                    ));

                    array_push($gpIds, $gpId);
                }
                //发送消息
                //{"school_id":"599","msg_type":90,"subject_id":3,"send_type":"special","product_type":29,"gp_group_id":"780620754713923584","gp_ids":["780620755246600192","780620755766693888"]}

                $sendMsg=array(
                    'school_id'=>$this->schoolId,
                    'msg_type'=>1,
                    'subject_id'=>$this->subjectId,
                    'send_type'=>'special',
                    'product_type'=>29,
                    'gp_group_id'=>$groupId,
                    'gp_ids'=>$gpIds
                );

                $transaction->commit();
                sendDataToKafka('php-product-html',$sendMsg);
            } catch (Exception $e) {
                $transaction->rollBack();
                if (YII_ENV == 'production') {
                    $error[] = '系统错误[SQL]';
                } else {
                    $error[] = $e->getMessage();
                }
            }
        }
        if ($error) {
            echo json_encode(array('status' => 0, 'error' => $error));
            exit;
        } else {
            echo json_encode(array('status' => 1));
            exit;
        }
    }

    //获取专题宝产品班级
    public function actionAjaxGetClasses()
    {
        $result = array();
        $grade = (int)Req::post('grade');
        if ($grade) {
            $sql = "select class_id,class_name from class where semester_id = '{$this->semesterId}' and grade = {$grade} and class_type = 1 and is_hide=0";
            $data = $this->sConn->createCommand($sql)->queryAll();
            if ($data) {
                $basic = imsBasicAuth($this->schoolId . '_' . Yii::app()->session['coachInfo']['coach_name'], Yii::app()->params["zsy_api_key"]);
                $Sem = new SSemester();
                $code = $Sem->conn->createQuery()
                    ->from('semester')
                    ->where("semester_id = '" . $this->semesterId . "'")
                    ->limit(1)
                    ->query()
                    ->read();
                foreach ($data as $k => $v) {
                    $studentIds = SStudentClassRelation::model()->getStudentIdsByClassId_Status_0($v['class_id']);
                    if($studentIds) {
                        $intarr = array(
                            "schoolId" => $this->schoolId,
                            "clazzId" => $v['class_id'],
                            "semester" => $code['refer_code'],
                            "grade" => 3,
                            "students" => $studentIds,
                            "examTime" => time(),
                            "classify" => 31,
                            "subject" => 3
                        );

                        $rs = json_decode(Curl::http_post_Basic_json(Yii::app()->params["get_limit_url"], json_encode($intarr), $basic));
                        if (!$rs) {
                            echo json_encode(array('status' => 0, 'error' => '接口错误'));
                            exit;
                        }
                        if ($rs->errCode != "00") {
                            echo json_encode(array('status' => 0, 'error' => $rs->errMsg));
                            exit;
                        }
                        if (!empty($rs->data)) {
                            array_push($result, array('class_id' => $v['class_id'], 'class_name' => $v['class_name']));
                        }
                    }
                }
            }
        }
        echo json_encode($result);
        exit;
    }

    //专题宝班级重置页面
    public function actionClasses()
    {
        $groupId = Req::get('gp_group_id');
        $name = Req::get('name');

        if (empty($groupId) || empty($name)) {
            Yii::app()->jump->error('参数异常');
        }
        $newCondition[] = 'g.gp_group_id=' . $groupId;
        $model = new SGeneralProductSetting();
        $rs = $model->getList($newCondition, array('g.create_time desc'), 100);
        if (!isset($rs['rs'])) {
            Yii::app()->jump->error('获取班级数据失败');
        }
        $resetTotal=3;//学管重置总次数
        foreach($rs['rs'] as $key=>$item){
            //学管剩余重置次数
            $item['learn_tube_reset_residue_count']=$resetTotal>$item['learn_tube_reset_count']?$resetTotal-$item['learn_tube_reset_count']:0;
            //学管30分钟内只能重置一次
            $item['is_cool_down']=time()-$item['learn_tube_reset_time']<=1800?0:1;
            //冷却文字提示 30分钟内并且剩余次数大于0
            $item['is_cool_down_prompt']=!$item['is_cool_down'] && $item['learn_tube_reset_residue_count']?true:false;
            $rs['rs'][$key]=$item;
        }

        //是不是技术支持
        $isTechnicalSupport=1;
        if(!isset(Yii::app()->session['testFlag']) || Yii::app()->session['testFlag']!=1 ){
            $isTechnicalSupport=0;
        }

        $data['resultList'] = $rs['rs'];
        $data['productName'] = $name;
        $data['currentWeek'] = date('W');
        $data['is_technical_support']=$isTechnicalSupport;
        $this->render('reset', $data);
    }

    //重置操作
    public function actionReset()
    {
        $gpIds = Req::post('classExam');
        if (!$gpIds || !is_array($gpIds)) {
            echo json_encode(array("status" => 0, "message" => "参数错误!"));
            exit;
        }
        $transaction = $this->sConn->beginTransaction();
        try {
            $gpIdsStr=implode(',',$gpIds);
            $sql="select gp_id,reset_times,learn_tube_reset_count from general_product where gp_id in ({$gpIdsStr})";
            $generalProducts=$this->sConn->createCommand($sql)->queryAll();
            $learnTubeResetCounts=_array_column($generalProducts,'learn_tube_reset_count','gp_id');

            foreach ($gpIds as $gpId) {
                $this->sConn->createCommand()->update("general_product_student", array(
                    'is_create_html' => 90,
                    'is_create_pdf' => 90,
                    'is_download' => 0,
                    'pdf_page_num' => 0,
                    'pdf_sheet_num' => 0,), "gp_id = '{$gpId}'");
                if(!isset(Yii::app()->session['testFlag']) || Yii::app()->session['testFlag']!=1 ) {
                    if(!isset($learnTubeResetCounts[$gpId])){
                        continue;
                    }
                    $learnTubeResetCount=$learnTubeResetCounts[$gpId]+1;
                    $this->sConn->createCommand()->update("general_product", array('reset_times' => new CDbExpression('reset_times+1'),'learn_tube_reset_count'=>$learnTubeResetCount,'learn_tube_reset_time'=>time()), "gp_id = '{$gpId}'");
                }else{
                    $this->sConn->createCommand()->update("general_product", array('reset_times' => new CDbExpression('reset_times+1')), "gp_id = '{$gpId}'");
                }
            }
            //发送消息
            $groupModel = SGeneralProduct::model()->find('gp_id=:gp_id',array('gp_id'=>$gpIds[0]));
            if(!$groupModel){
                echo json_encode(array("status" => 0, "message" => "数据异常!"));
                exit;
            }
            // setting更新补提信息
            $this->sConn->createCommand()->update("general_product_setting", array('status' =>1), "gp_group_id = '{$groupModel['gp_group_id']}'");

            $sendMsg=array(
                'school_id'=>$this->schoolId,
                'msg_type'=>90,
                'subject_id'=>$this->subjectId,
                'send_type'=>'special',
                'product_type'=>29,
                'gp_group_id'=>$groupModel['gp_group_id'],
                'gp_ids'=>$gpIds
            );

            $transaction->commit();
            sendDataToKafka('php-product-html',$sendMsg);
        } catch (\Exception $e) {
            $transaction->rollBack();
            echo json_encode(array('status' => 0, 'message' => $e->getMessage()));
            exit;
        }

        echo json_encode(array('status' => 1));
        exit;
    }

    //专题宝教师版
    public function actionTeaching()
    {
        $gpId = Req::get('gpId');
        if (!$gpId) {
            echo json_encode(array("status" => 0, "message" => "参数错误!"));
            exit;
        }
        $rs = SGeneralProductStudent::model()->find('gp_id=:gp_id and is_teaching_pdf=1 and is_create_pdf=1',array('gp_id'=>$gpId));
        if(empty($rs) && empty($rs['pdf_path'])){
            echo json_encode(array("status" => 0, "message" => "pdf未生成"));
            exit;
        }
        if($rs['pdf_create_time']<(time()-604800)){
            echo json_encode(array("status" => 0, "message" => "pdf已失效,请重新生成!"));
            exit;
        }
        echo json_encode(array('status'=>1, 'url'=>Yii::app()->params['static_url'][$this->schoolGroupId].$rs['pdf_path']));exit;
    }

    public function actionDownloadDir(){
        $filename= dirname(dirname(dirname(__FILE__))).'/assets/data/special_method.pdf';
        if (FALSE!== ($handler = fopen($filename, 'r')))
        {
            header('Content-Description: File Transfer');
            header('Content-Type: application/octet-stream');
            header('Content-Disposition: attachment; filename=专题宝方法对应目录.pdf');
            header('Content-Transfer-Encoding: chunked'); //changed to chunked
            header('Expires: 0');
            header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
            header('Pragma: public');

            while (!feof($handler)) {
                file_put_contents("php://output", fread($handler, 4096));
            }
            fclose($handler);

        }
    }
}