drupal7 开发自定义上传、下载模块的上传功能

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：

1 function uploadview_form_submit($form, &$form_state){   
2 //     Load the file via file.fid.  
3     $file = file_load($form_state['values']['my_file_field']);
4     $file->status = FILE_STATUS_PERMANENT;
5     file_save($file);
6 
7     drupal_set_message('保存成功'); 
9 }

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：

drupal7 开发自定义上传、下载模块的上传功能

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',
        ),
    );
}

View Code

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;
}

View Code

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>'
}

View Code

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drupal7 开发自定义上传、下载模块的上传功能

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