drupal7 开发自定义上传、下载模块的上传功能

2022-08-22 16:46:09

关键点有两个：1.在页面上显示出上传的控件，2.代码实现文件上传到服务器的功能

一、显示控件：

先来看关键点1：实现页面显示出上传控件，关键代码：

 $form['my_file_field'] = array(

        '#type' => 'managed_file',

        '#title' => '文件',

        )

    );

做过上传的功能的人，会发现上面的代码值能实现在页面显示上传控件，但是没有限制上传大小。另外需要注意的是，上传的路径和格式也必须在定义该控件的时候指定。完整的上传控件的代码实现：

define("UPLOAD_Base_Path", "public://myfilezjf");

$str_upload_extend='doc docx xls xlsx ppt pptx ';//这里写允许的上传格式

    $SIZE_M=8;//限制大小，单位M

    $form['my_file_field'] = array(

        '#type' => 'managed_file',

        '#title' => '文件',

        '#description' => '格式限制：'.$str_upload_extend.' 大小限制：'.$SIZE_M.'M以内',

        '#upload_location' => UPLOAD_Base_Path,

        '#upload_validators' => array(

            'file_validate_extensions' => array($str_upload_extend),//限制上传文件后缀

            // Pass the maximum file size in bytes

            'file_validate_size' => array($SIZE_M*1024*1024),//限制大小

        )

    );

二、上传代码具体实现关键点:2：实现上传的具体代码：

 function uploadview_form_submit($form, &$form_state){

 //     Load the file via file.fid.

     $file = file_load($form_state['values']['my_file_field']);

     $file->status = FILE_STATUS_PERMANENT;

     file_save($file);

     drupal_set_message('保存成功');

 }

需要特别说明一下的是，第4行代码，就是为文件制定了satus=1，即永久保存的文件，不会被drupal自动删除；否则是status=0，指的是临时文件，会被drupal定期自动删除。

三、完全意义上的实现

到前面两步，我们已经实现了上传的功能，但是怎么查看上传的文件列表，从而进行下载和管理呢？就是你怎么从数据库中查出你做额这个页面的上传的文件呢？

这里我们需要了解，凡是上传的文件都会在file_manage表中保存一条记录，上面说到的status就是该表的属性之一，下面就是一条该表的记录：

但是其他模块上传的文件也会在这张表中留下痕迹，怎么区分呢？目前我能给出的方案就是，单独再建立一张表，两张表进行关联，表结构为：fid int(10) PK， title varchar(255)

完整代码如下：

3.1 upload.module文件：

<?php 

function upload_menu()

{

    $items=array();

    //管理列表

    $items['admin/upload']=array(

        'title' => '上传',

        'description' => '上传',

        'page callback' => 'manage_upload_list',

        'access arguments' => array('access content' ),

        'type' => MENU_NORMAL_ITEM,

        'file' => 'upload.admin.inc',

    );

    //进行上传

    $items['upload']=array(

        'title' => '上传--测试',

        'description' => '上传',

        'page callback' => 'drupal_get_form',

        'page arguments' => array('uploadview_form'),

        'access arguments' => array('to upload' ),

        'type' => MENU_NORMAL_ITEM,

        'file' => 'upload.pages.inc',

    );

    //下载列表

    $items['upload/list']=array(

        'title'=>'下载列表',

        'description' => '下载列表',

        'page callback' => 'download_list',

        'access arguments' => array('to upload' ),

        'type' => MENU_NORMAL_ITEM,

        'file' => 'upload.pages.inc',

    );

    //删除

    $items['admin/upload/%/delete']=array(

        'title'=>'删除',

        'description'=>'删除',

        'page callback'=>'drupal_get_form',

        'page arguments'=>array('upload_delete_confirm',2),

        'access arguments' => array('manage upload' ),

        'type' => MENU_NORMAL_ITEM,

        'file' => 'upload.admin.inc',

    );

    return $items;

}

function upload_permission(){

    return array(

        'manage upload'=>array(

            'title'=>t('管理下载权限')

        ),

        'to upload'=>array(

            'title'=>t('进行上传')

        ),

    );

}

function upload_block_info()

{

    $blocks['upload_download']=array(

        'info'=>t('下载区域'),

        'weight'=>1,

        'status'=>1,

        'region'=>'Sidebar first'

    );

 return $blocks;

}

function upload_block_view($delta='')

{

    $block=array();

    switch ($delta)

    {

        case 'upload_download':

            $block['subject']='下载';

            $block['content']=get_mydownload_block();

            break;

    }

 return $block;

}

function get_mydownload_block()

{

    $str_query="SELECT c_f_u.fid AS fid, c_f_u.title AS title, f_m.uri AS uri, f_m.filename AS filename

                FROM

                custom_file_upload c_f_u

                INNER JOIN file_managed f_m ON c_f_u.fid=f_m.fid

                ORDER BY f_m.timestamp DESC

                LIMIT 10 OFFSET 0 ";

    $content = db_query($str_query);

    $lists=array();

    $output='<div class="item-list">';

    $_count=1;

    if ($content) {

        $output.='<ul>';

        $length=count($content);

        foreach ($content as $data)

        {

            $class='';

            if($_count==1) {//第一个

                $class='class="first"';

            }

            elseif ($_count==$length)//最后一个

            {

                $class='class="last"';

            }

            $url_head='http://'.$_SERVER['HTTP_HOST'].'/drupal755/sites/default/files/';

            $url=$url_head.ltrim($data->uri,'public://');

            $html_h=l($data->title,$url);

            $output.='<li '.$class.'>'.$html_h.'</li>';

            $_count++;

        }

        $output.='</ul>';

    }

    else

    {

        $output.='<p>No Content</p>';

    }

    $output.='</div>';

    if ($_count>=5) {

        $url='http://'.$_SERVER['HTTP_HOST'].'/drupal755/upload/list';

        $output.='<div style="text-align:right;width:100%">'.l('更多>>',$url).'</div>';

    }

    return  $output;

}

function upload_theme(){

    return array(

        'hoyand_paiko_thumb_upload' => array(

            'render element' => 'element',

        ),

    );

}

3.2 upload.pages.inc文件

<?php

define("UPLOAD_Base_Path", "public://myfilezjf");

function  uploadview_form($form, &$form_state){

    //gif png jpg jpeg txt

    $str_upload_extend='doc docx xls xlsx ppt pptx ';//这里写允许的上传格式

    $SIZE_M=8;//限制大小，单位M

    $form['my_file_field'] = array(

        '#type' => 'managed_file',

        '#title' => '文件',

        '#description' => '格式限制：'.$str_upload_extend.' 大小限制：'.$SIZE_M.'M以内',

        '#upload_location' => UPLOAD_Base_Path,

//         '#default_value' => empty($user->picture->fid) ? 0 : $user->picture->fid,

//         '#theme' => 'hoyand_paiko_thumb_upload',  //留意这个我们为他增加了一个theme

        '#upload_validators' => array(

            'file_validate_extensions' => array($str_upload_extend),//限制上传文件后缀

            // Pass the maximum file size in bytes

            'file_validate_size' => array($SIZE_M*1024*1024),//限制大小

        )

    );   

    $form['title']=array(

        '#type'=>'textfield',

        '#title'=>t('名称'),

        '#size' => 30,

        '#required' => TRUE,

    );

//     Add the buttons.

    $form['buttons'] = array();

    $form['buttons']['#weight'] = 100;

    $form['buttons']['submit'] = array(

        '#type' => 'submit',

        '#value' => t('Save'),

        '#weight' => 5,

        '#submit' => array('uploadview_form_submit'),

        '#prefix' => '<div >',

        '#suffix' => '</div>',

    );

    $form['#validate'][] = 'pk_settings_form_validate';

    return $form;

}

function uploadview_form_submit($form, &$form_state){

//     Load the file via file.fid.

    $file = file_load($form_state['values']['my_file_field']);

    $file->status = FILE_STATUS_PERMANENT;

    file_save($file);

    insert_customfile($file->fid,$form_state['values']['title']);//插入custom_file_upload表

    drupal_set_message('保存成功');

}

function insert_customfile($fid,$title="")

{

    db_insert('custom_file_upload')

    ->fields(

        array(

            'fid'=>$fid,

            'title'=>$title

        )

        )->execute();

}

function pk_settings_form_validate($form, &$form_state) {

}

function download_list()

{

    $query = db_select('custom_file_upload','c_f_u');

     $query->join('file_managed','f_m','c_f_u.fid=f_m.fid');

     $objects=$query->extend('PagerDefault')

     ->fields('c_f_u', array( 'fid','title'))

     ->fields('f_m', array( 'uri','filename','timestamp'))

//      ->condition('f_m.status',1)

     ->orderBy('f_m.timestamp','DESC')

     ->limit(10)

     -> execute() ; 

    $output="";

    $rows = array();

    $title_length=25;

    if (true) { 

        foreach ($objects as $key => $object) {

//             debug($object);

            $row = array();

            $title="";

            if (strlen($object -> filename)>$title_length) {

                 $title= drupal_substr($object -> filename,0,50).'...' ;

            }

            else {

                $title= $object -> filename ;

            }

            $url_head='http://'.$_SERVER['HTTP_HOST'].'/drupal755/sites/default/files/';

            $url=$url_head.ltrim($object->uri,'public://');

            $row['title']=l($object->title,$url);

            $row['created']=date('Y-m-d h:m:s',$object->timestamp);

            $rows[] = $row;

        }

        $results=$rows;

        $output .= theme('table', array('rows' => $rows));

        $output .= theme('pager');

    }

    else

    {

       $output="暂无数据";

    }

   return  $output;

}

3.3 upload.admin.inc 文件

<?php

/*管理列表*/

function manage_upload_list()

{

    $output = "";

    $query = db_select('custom_file_upload','c_f_u');

             $query->join('file_managed','f_m','c_f_u.fid=f_m.fid');

    $objects = $query ->extend('PagerDefault')

                ->fields('f_m',array('fid','uri','filename'))

                ->fields('c_f_u',array('title'))

                ->orderBy('f_m.fid','DESC')

                ->limit(2)

                -> execute();

    $rows = array();

    $title_length=25;

    foreach ($objects as $key => $object) {

        $row = array();

        $title="";

        if (strlen($object -> filename)>$title_length) {

            $title= drupal_substr($object -> filename,0,50).'...' ;

        }

        else {

            $title= $object -> filename ;

        }

        $url_head='http://'.$_SERVER['HTTP_HOST'].'/drupal755/sites/default/files/';

        $url=$url_head.ltrim($object->uri,'public://');

        $row['title']=l($object->title,$url);

        $row[]    = array('data' => l(t('删除'), 'admin/upload/'.$object->fid.'/delete'));

        $rows[] = $row;

    }

    $output .= theme('table', array('rows' => $rows));

    $output .= theme('pager');

    return $output;

}

/**留言--删除页面

 * Form constructor for the node deletion confirmation form.

 *

 * @see node_delete_confirm_submit()

 */

function upload_delete_confirm($form, &$form_state, $fid) {

    $form['fid'] = array(

        '#type' => 'hidden',

        '#default_value'=>$fid

    );

     $object=db_query('select title from {custom_file_upload} where fid= :fid ',array(':fid'=>$fid))

    ->fetch();

    // Always provide entity id in the same form key as in the entity edit form.

    return confirm_form($form,

        t('Are you sure you want to delete %title?', array('%title' => $object->title)),

        '/zjf',

        t('This action cannot be undone.'),

        t('Delete'),

        t('Cancel')

        );

}

/**

 * Executes node deletion.

 *

 * @see node_delete_confirm()

 */

function upload_delete_confirm_submit($form, &$form_state) {

    if ($form_state['values']['confirm']) {

        $fid=$form_state['values']['fid'];

        $file = file_load($fid);

        file_delete($file, TRUE); 

        $num_deleted = db_delete('custom_file_upload')

        ->condition('fid', $fid)

        ->execute();

        cache_clear_all();

        //watchdog('content', '@type: deleted %title.', array('@type' => $node->type, '%title' => $node->title));

        drupal_set_message(t('删除成功'));

    }

    $form_state['redirect'] ='admin/upload' ;//  '<front>'

}

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