我当前正在尝试通过PHP AJAX请求从服务器下载文件。我是这样构建的:
首先,我要获取所有文件(在此示例中只有一个)并建立链接:
$invoice_number_base = 'RE-2018-12-00000039-E';
//Get all generated PDF file names by tmp path and invoice number base
foreach ( glob( '/var/www/vhosts/localhost/httpdocs/wp-content/uploads/wpo_wcpdf/attachments/' . $invoice_number_base . '*.pdf' ) as $file ) { ?>
<a target="_blank" class="admin_et_pb_button"
onclick="showGenInvoice('<?php echo $file ?>')">
<?php echo basename( $file ) ?>
</a>
<?php }
这将在此处生成此链接:
<a target="_blank" class="admin_et_pb_button" onclick="showGenInvoice('/var/www/vhosts/localhost/httpdocs/wp-content/uploads/wpo_wcpdf/attachments/RE-2018-12-00000039-E.pdf')">RE-2018-12-00000039-E.pdf</a>
现在,我已经构建了我的JS函数,以在用户单击按钮时调用AJAX函数:
function showGenInvoice(file) {
var data = {
'action': 'show_gen_invoice',
'file': file
};
jQuery.post(ajaxurl, data, function () {
}).fail(function () {
alert('An error occured!')
});
}
(该函数具有参数链接,其中包含服务器上每个文件的路径)
此后,我在WordPress中构建了AJAX回调:
/**
* Get generated invoice from attachments folder so the invoices which are sent by email
*/
add_action( 'wp_ajax_show_gen_invoice', array( $this, 'show_gen_invoice' ) );
public function show_gen_invoice() {
//Get file path from request
$file = $_POST['file'];
if ( is_admin() && file_exists( $file ) ) {
header( 'Content-Description: File Transfer' );
header( 'Content-Type: application/octet-stream' );
header( 'Content-Disposition: attachment; filename="' . basename( $file ) . '"' );
header( 'Expires: 0' );
header( 'Cache-Control: must-revalidate' );
header( 'Pragma: public' );
header( 'Content-Length: ' . filesize( $file ) );
ob_clean();
flush();
readfile( $file );
wp_die();
} else {
wp_send_json_error( null, 500 );
wp_die();
}
}
但是不幸的是,当我按下按钮时,没有文件被下载。没有错误,什么都没有发生。怎么了?
注意:
文件所在的文件夹受保护,无法访问 带有正常的页面网址和/ uploads /...
更新
请签出我的解决方案!当您想使用PHP从后端从服务器下载某些内容时,此功能非常有用。
答案 0 :(得分:0)
感谢提示。这是我针对该问题的解决方案:
新链接:
//Get invoices tmp path
$tmp_path = WPO_WCPDF()->main->get_tmp_path( 'attachments' );
//Get invoice number
$invoice_number_base = $invoice->get_number()->get_formatted(); ?>
<div class="wpo_wcpdf-generated-invoices-container">
<?php
//Get all generated PDF file names by tmp path and invoice number base
foreach ( glob( $tmp_path . $invoice_number_base . '*.pdf' ) as $invoice ) { ?>
<a target="_blank"
class="admin_et_pb_button"
href="post.php?invoice=<?php echo basename( $invoice ) ?>">
<?php echo basename( $invoice ) ?>
</a>
<?php } ?>
</div>
<?php
在浏览器中显示文件的代码:
/**
* Add file download functionality to admin post
*/
add_action( 'admin_init', 'show_gen_invoice' );
function show_gen_invoice() {
//Check if invoice is set and get value = the path of the invoice
if ( isset( $_REQUEST['invoice'] ) ) {
//Get invoices tmp path
$tmp_path = WPO_WCPDF()->main->get_tmp_path( 'attachments' );
//Get invoice basename
$invoice = urldecode( $_REQUEST['invoice'] );
if ( is_admin() && file_exists( $tmp_path . $invoice ) ) {
$content = file_get_contents( $tmp_path . $invoice );
header( 'Content-Type: application/pdf' );
header( 'Content-Length: ' . filesize( $tmp_path . $invoice ) );
header( 'Content-Disposition: inline; filename=' . $invoice );
header( 'Cache-Control: private, max-age=0, must-revalidate' );
header( 'Pragma: public' );
ini_set( 'zlib.output_compression', '0' );
flush();
die( $content );
}
}
}
我现在已经在浏览器中显示了该文件,但是如果您想直接下载该文件,则可以使用上面的工作代码进行下载。
我现在正在使用admin_init
钩子将代码放入post.php
文件中,在这里我可以使用$_REQUEST
来获取此文件。