Send File & return to previous page

[lokust]

The following script sends a file to a given email along with a message.
I am posting the file to the script as a query string, eg. I link to script like this:

<a href="php/sendfile.php?remote=sendfile/abc.pdf">receive pdf</a>

My question: How can I return to the original page (the page which links to the script) instead of returning to the script after the file has been sent successfully?
Could header( "Location: be used in combination with javascript:history.go(-1) ?
If so where would it be placed in the script?

Hope that makes sense. Thanks for any help.

<?php
/*
Hack Name: PHP Send File By Email
Hack URI: http://frenchfragfactory.net/ozh/my-projects/php-send-file-by-email-sendmail-attachment/
Description: Fetch a file and send it as an email attachment
Version: 1.0
Author: Ozh
Author URI: http://planetOzh.com
*/

/***********************************
* CONFIGURE THE SCRIPT
* Edit here to suit your needs
***********************************/

$sendfile['email_from'] = "Name <[e-mail]>";
    // Who the email is from

$sendfile['email_subject'] = "File : %f (%s bytes)";
    // The Subject of the email (%f will be file name, %s size)

$sendfile['email_message'] = "File name : %f\nSize: %s bytes\nDownloaded from : %l\n\n%t";
    // Message along with attachment (%f: file name, %s: size, %l: original location, %t: free text)

$sendfile['email_to'] = "[e-mail]";
    // Default value of recipient's email when nothing specified

$sendfile['file_dir'] = "/home/lokust/public_html/sendfile_temp/";
    // Directory in which sent files will be mirrored first. Create this directory and chmod it 777 (make it writeable)

$sendfile['file_delete'] = 1;
    // Default behaviour of the script once the file has been sent by email. Delete it (1) or keep it on server (0)

$sendfile['file_log'] = "sendfile.log";
    // Log file in which dates and URL of files sent are stored


/***********************************
* END CONFIG
* Do not modify below, unless you know
* what you are doing
***********************************/

$sendfile['remote'] = stripslashes(init('remote'));
$sendfile['local'] = stripslashes(init('local'));
$sendfile['deletefile'] = init('deletefile');
$sendfile['dest'] = init('dest');
$sendfile['text'] = stripslashes(init('text'));
$sendfile['log'] = stripslashes(init('log'));
$sendfile['action'] = init('action');
$sendfile['bintext'] = init('bintext');

html();

if (!$sendfile['remote'] and $sendfile['action']) {
    print '<p class="error"><b>ERROR</b> : You did not specify any file to send ! Try again !</p>';
    $sendfile['action'] = '';
}

switch ($sendfile['action']) {
    case 'mirror':
        mirrorfile($sendfile['remote']);
        break;
    case 'send':
        sendfile($sendfile['local']);
    default:
        printform();
}

function init($in='') {
    return @$_GET[$in]?@$_GET[$in]:@$_POST[$in];
}

function logsend() {
    global $sendfile;

$log=fopen($sendfile['file_log'],"a");
$stamp = date("Y/m/d G:i:s");
$msg = "$stamp :\n\tFile ${sendfile['remote']}\n\tSent to ${sendfile['dest']}\n\n";
fputs($log,$msg);
fclose($log);
}

function sendfile($input) {

global $sendfile;

/* PREPARE VARIABLES */
if (!$sendfile['dest']) $sendfile['dest'] = $sendfile['email_to'];
if ($sendfile['log']) print $sendfile['log'];

print "<p class=\"info\">Sending file to <b>" .  $sendfile['dest'] . "</b> ...</p>";

$sendfile['email_subject'] = str_replace ('%f',basename($input),$sendfile['email_subject']);
$sendfile['email_subject'] = str_replace ('%s',filesize($input),$sendfile['email_subject']);

$sendfile['email_message'] = str_replace ('%f',basename($input),$sendfile['email_message']);
$sendfile['email_message'] = str_replace ('%s',filesize($input),$sendfile['email_message']);
$sendfile['email_message'] = str_replace ('%l',$sendfile['remote'],$sendfile['email_message']);
$sendfile['email_message'] = str_replace ('%t',$sendfile['text'],$sendfile['email_message']);


/* PREPARE MAIL HEADERS */
$headers = "From: ".$sendfile['email_from'];
$semi_rand = md5(time());
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";

$headers .= "\nMIME-Version: 1.0\n" .
            "Content-Type: multipart/mixed;\n" .
            " boundary=\"{$mime_boundary}\"";

$email_message = "This is a multi-part message in MIME format.\n\n" .
                "--{$mime_boundary}\n" .
               "Content-Type:text/plain; charset=\"iso-8859-1\"\n" .
               "Content-Transfer-Encoding: 7bit\n\n" .
        @$sendfile['email_message'] . "\n\n" .
        "-- \n" ;

/* PREPARE ATTACHMENT */
$fileatt = basename($input) ;
$fileatt_type = "application/octet-stream";

$file = fopen($input,"r${sendfile['bintext']}");
$data = fread($file,filesize($input));
fclose($file);

$data = chunk_split(base64_encode($data));

$email_message .= "--{$mime_boundary}\n" .
    "Content-Type: {$fileatt};\n" .
    " name=\"{$fileatt}\"\n" .
    "Content-Transfer-Encoding: base64\n\n" .
    $data . "\n\n" .
    "--{$mime_boundary}--\n";

/* SEND FILE */
$ok = @mail($sendfile['dest'], $sendfile['email_subject'], $email_message, $headers);

if($ok) {
    echo '<p class="info">File successfully sent!</p>';
    logsend();
} else {
    echo('<p class="error"><b>ERROR</b> : could not send email.</p>');
}

if($sendfile['deletefile'] and ($input != __FILE__) ) {
    $ok=unlink($input);
    if ($ok==FALSE) {
        echo '<p class="error"><b>ERROR</b> : could not delete file from server.</p>';
    } else {
        echo '';
    }
}
}

function mirrorfile($url) {

global $sendfile;

if (!$sendfile['local']) $sendfile['local'] = basename($url);

$msg = '';

// open source file
$hfici=@fopen($url,"r${sendfile['bintext']}");

// woks fine ?
if($hfici==FALSE){
    // No :/
    $msg="<b>ERROR</b> : couldn't read source file <b>$url</b>.";
} else {
    // Yes : create target file
    $hfico=@fopen($sendfile['file_dir'] . '/' . $sendfile['local'],"w${sendfile['bintext']}");
    // works fine ?
    if($hfico==FALSE){
        // No :/
        $msg="<b>ERROR</b> : couldn't locally write file";
    }
    else {
        // Yes : read remote and write local
        while($buf=fread($hfici,1024)){
            fwrite($hfico, $buf);
        }
        fclose($hfici);
        fclose($hfico);
    }
}
if ($msg) {
    print "<p class='error'>$msg</p>";
    printform();
} else {
    print '<form method="post" action="'. basename(__FILE__) . '" name="form_send">';
    print '<input type="hidden" name="remote" value="' . $sendfile['remote'] . '">';
    print '<input type="hidden" name="local" value="' . $sendfile['file_dir'] . '/' . $sendfile['local'] . '">';
    print '<input type="hidden" name="deletefile" value="' . $sendfile['deletefile'] . '">';
    print '<input type="hidden" name="dest" value="' . $sendfile['dest'] . '">';
    print '<input type="hidden" name="text" value="' . $sendfile['text'] . '">';
    print '<input type="hidden" name="bintext" value="' . $sendfile['bintext'] . '">';
    print '<input type="hidden" name="log" value="' . htmlentities($log . $log2) . '">';
    print '<input type="hidden" name="action" value="send">';
    //print '<input type="submit">';
    print '</form>';
    print <<<JS
    <script>
    document.form_send.submit();
    </script>
JS;
    }
}

function printform() {

global $sendfile;

if ($sendfile['file_delete']) {
    $checked_del = 'checked';
    $checked_keep = '';
} else {
    $checked_del = '';
    $checked_keep = 'checked';
}

$this = basename(__FILE__);

print <<<HTML
</div>
<div id="box">
<fieldset id="form"><legend><a href="$this">Send a File</a></legend>

<form method="post" name="form_mirror">

<input class="wide" type="hidden" name="remote">
<input class="wide" type="hidden" name="local">
<input type="hidden" name="bintext" value="b" id="bintext_b">
<input type="hidden" name="deletefile" value="1" id="radio_del" $checked_del>

<p><span class="label">Send file to</span><input class="wide"  type="text" name="dest"></p>
<p><span class="label">Additional message</span><textarea name="text"></textarea></p>
<p><span class="label">&nbsp; </span><input class="wide"  type="submit" value="Send"></p>
<input type="hidden" name="action" value="mirror">

</form>

</fieldset>

</div>
HTML;
}

function html() {
    print <<<HTML
<html>
<head>
<title>PHP Send File</title>
</head>
<body>
<link rel="stylesheet" type="text/css" media="all" href="../css/mainII.css">
<div id="log">
HTML;
}
?>

[drew010]

you could use $_SERVER['HTTP_REFERER'] but thats not guaranteed to always exist or be accurate if the person is behind a proxy or network that blocks those headers. some browser plugins can change it too.

best thing to do would be to add ?from=<?php echo $SERVER['PHP_SELF']; ?> to the query string on that download file and then send them back to the page by using $GET['from']

[lokust]

Hello Drew.

So the query string would now read:

<a href="php/sendfile.php?remote=sendfile/abc.pdf?from=<?php echo $_SERVER['PHP_SELF']; ?>">receive pdf</a>

then send them back to the page by using $_GET['from']

Would something like this do it?

<?php
$goto = $_GET['from'];
header( "Location: $goto);
?>

Where would it be placed in the code?

[drew010]

im not sure exactly where the final part of the script is after a message is sent, but header only works if you dont output any data. i think it might go here

    if($ok) {
        //echo '<p class="info">File successfully sent!</p>';  //take this out
        logsend();
        //redirect here
    } else {
        echo('<p class="error"><b>ERROR</b> : could not send email.</p>');
    } 

[lokust]

just one thing.

I'm posting the file on the query string so:

?remote=sendfile/abc.pdf?from=<?php echo $_SERVER['PHP_SELF']; ?

throws an error "ERROR : couldn't read source file".

I guess to use this method I would have to filter the query string - everything after and including the second "?" should be deleted before the $remote variable is set and after the $from variable is set.

[drew010]

it will work if that second ? is changed to &
?remote=sendfile/abc.pdf&from=<?php echo $_SERVER['PHP_SELF']; ?>

[lokust]

That did it - the file is sending correctly (thanks!) though I get this error:

Warning: Cannot modify header information - headers already sent by (output started at /home/lokust/public_html/sendfile.php:262) in /home/lokust/public_html/sendfile.php on line 143

Line 262 is the "}"

in

HTML;
}
?>

The code I have now:

if($ok) {
        //echo '<p class="info">File successfully sent!</p>';
        logsend();
		$goto = $_GET['from'];
		header("Location: $goto");
    } else {
        echo('<p class="error"><b>ERROR</b> : could not send email.</p>');
    }

[drew010]

check line 143, it sounds like there is something being output there. you cannot send a header after any output to the browser, even spaces or newlines. you can put "exit;" (no quotes) after the header call, but make sure nothing is output prior to that line.

[lokust]

line 143 is: header( "Location: $goto");
I've removed all spacing - get the same error.

I think the problem is that HTML output begins here at the top: html(); ??

[drew010]

yeah, that would be whats causing it.

[lokust]

well i guess i'm screwed then. 😃

[lokust]

I hacked it together and it does what I want, here's the code:

<?php

$sendfile['email_from'] = "Hey Ho <[e-mail]>";
    // Who the email is from

$sendfile['email_subject'] = "Hey Ho Information";
    // The Subject of the email

$sendfile['email_message'] = "Thank you for your interest.";
    // Message along with attachment 

$sendfile['email_to'] = "[e-mail]";
    // Default value of recipient's email when nothing specified

$sendfile['file_dir'] = "/home/lokust/public_html/clients/username/www/php/sendfile_temp/";
    // Directory in which sent files will be mirrored first. Create this directory and chmod it 777 (make it writeable)

$sendfile['file_delete'] = 1;
    // Default behaviour of the script once the file has been sent by email. Delete it (1) or keep it on server (0)

$sendfile['file_log'] = "sendfile.log";
    // Log file in which dates and URL of files sent are stored


/***********************************
* END CONFIG
* Do not modify below, unless you know
* what you are doing
***********************************/

$sendfile['remote'] = stripslashes(init('remote'));
$sendfile['local'] = stripslashes(init('local'));
$sendfile['deletefile'] = init('deletefile');
$sendfile['requireddest'] = init('requireddest');
$sendfile['text'] = stripslashes(init('text'));
$sendfile['log'] = stripslashes(init('log'));
$sendfile['action'] = init('action');
$sendfile['bintext'] = init('bintext');

html();

if (!$sendfile['remote'] and $sendfile['action']) {
    print '<p class="error"><b>ERROR</b> : You did not specify any file to send ! <a href=\"javascript:history.go(-1)\">Go back</a></p>';
    $sendfile['action'] = '';
}

switch ($sendfile['action']) {
    case 'mirror':
        mirrorfile($sendfile['remote']);
        break;
    case 'send':
        sendfile($sendfile['local']);
    default:
        printform();
}

function init($in='') {
    return @$_GET[$in]?@$_GET[$in]:@$_POST[$in];
}

function logsend() {
    global $sendfile;

$log=fopen($sendfile['file_log'],"a");
$stamp = date("Y/m/d G:i:s");
$msg = "$stamp :\n\tFile ${sendfile['remote']}\n\tSent to ${sendfile['requireddest']}\n\n";
fputs($log,$msg);
fclose($log);
}

function sendfile($input) {

global $sendfile;

/* PREPARE VARIABLES */
if (!$sendfile['requireddest']) $sendfile['requireddest'] = $sendfile['email_to'];
if ($sendfile['log']) print $sendfile['log'];

print "<p class=\"info\">Sending file to <b>" .  $sendfile['requireddest'] . "</b> ...</p>";

$sendfile['email_subject'] = str_replace ('%f',basename($input),$sendfile['email_subject']);
$sendfile['email_subject'] = str_replace ('%s',filesize($input),$sendfile['email_subject']);

$sendfile['email_message'] = str_replace ('%f',basename($input),$sendfile['email_message']);
$sendfile['email_message'] = str_replace ('%s',filesize($input),$sendfile['email_message']);
$sendfile['email_message'] = str_replace ('%l',$sendfile['remote'],$sendfile['email_message']);
$sendfile['email_message'] = str_replace ('%t',$sendfile['text'],$sendfile['email_message']);


/* PREPARE MAIL HEADERS */
$headers = "From: ".$sendfile['email_from'];
$semi_rand = md5(time());
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";

$headers .= "\nMIME-Version: 1.0\n" .
            "Content-Type: multipart/mixed;\n" .
            " boundary=\"{$mime_boundary}\"";

$email_message = "This is a multi-part message in MIME format.\n\n" .
                "--{$mime_boundary}\n" .
               "Content-Type:text/plain; charset=\"iso-8859-1\"\n" .
               "Content-Transfer-Encoding: 7bit\n\n" .
        @$sendfile['email_message'] . "\n\n" .
        "-- \nHey Ho\n" .
        "http://www.heyho.co.uk\n\n" ;

/* PREPARE ATTACHMENT */
$fileatt = basename($input) ;
$fileatt_type = "application/octet-stream";

$file = fopen($input,"r${sendfile['bintext']}");
$data = fread($file,filesize($input));
fclose($file);

$data = chunk_split(base64_encode($data));

$email_message .= "--{$mime_boundary}\n" .
    "Content-Type: {$fileatt};\n" .
    " name=\"{$fileatt}\"\n" .
    "Content-Transfer-Encoding: base64\n\n" .
    $data . "\n\n" .
    "--{$mime_boundary}--\n";

/* SEND FILE */
$ok = @mail($sendfile['requireddest'], $sendfile['email_subject'], $email_message, $headers);

if($ok) {
    echo '<p class="info">File successfully sent!</p>';
    logsend();
	echo '<p class="info"><a href="javascript:history.go(-3)"><< go back</a></p>';
	exit();
} 

if($sendfile['deletefile'] and ($input != __FILE__) ) {
    $ok=unlink($input);
    if ($ok==FALSE) {
        echo '<p class="error"><b>ERROR</b> : could not delete file from server.</p>';
    } //else {
        //echo '<p class="info">File successfully deleted.</p>';
   // }
}
}

function mirrorfile($url) {

global $sendfile;

if (!$sendfile['local']) $sendfile['local'] = basename($url);

//$log = "<p class=\"info\">Mirroring file <b>$url</b> ...</p>";

print $log;

$msg = '';

// open source file
$hfici=@fopen($url,"r${sendfile['bintext']}");

// woks fine ?
if($hfici==FALSE){
    // No :/
    $msg="<b>ERROR</b> : couldn't read source file <b>$url</b>.";
} else {
    // Yes : create target file
    $hfico=@fopen($sendfile['file_dir'] . '/' . $sendfile['local'],"w${sendfile['bintext']}");
    // works fine ?
    if($hfico==FALSE){
        // No :/
        $msg="<b>ERROR</b> : couldn't locally write file";
    }
    else {
        // Yes : read remote and write local
        while($buf=fread($hfici,1024)){
            fwrite($hfico, $buf);
        }
        fclose($hfici);
        fclose($hfico);
    }
}
if ($msg) {
    print "<p class='error'>$msg</p>";
    printform();
} else {
    //$log2 = "<p class='info'>File locally mirrored !</p><p class='info'>Preparing mail and attachment ...</p>";
    print $log2;
    print '<form method="post" action="'. basename(__FILE__) . '" name="form_send">';
    print '<input type="hidden" name="remote" value="' . $sendfile['remote'] . '">';
    print '<input type="hidden" name="local" value="' . $sendfile['file_dir'] . '/' . $sendfile['local'] . '">';
    print '<input type="hidden" name="deletefile" value="' . $sendfile['deletefile'] . '">';
    print '<input type="hidden" name="requireddest" value="' . $sendfile['requireddest'] . '">';
    print '<input type="hidden" name="text" value="' . $sendfile['text'] . '">';
    print '<input type="hidden" name="bintext" value="' . $sendfile['bintext'] . '">';
    print '<input type="hidden" name="log" value="' . htmlentities($log . $log2) . '">';
    print '<input type="hidden" name="action" value="send">';
    //print '<input type="submit">';
    print '</form>';
    print <<<JS
    <script>
    document.form_send.submit();
    </script>
JS;
    }
}

function printform() {

global $sendfile;

if ($sendfile['file_delete']) {
    $checked_del = 'checked';
    $checked_keep = '';
} else {
    $checked_del = '';
    $checked_keep = 'checked';
}

$this = basename(__FILE__);

print <<<HTML
</div>
<div id="box">
<fieldset id="form"><legend>Send a File</legend>

<form onSubmit="return checkrequired(this)" method="post" name="form_mirror">

<input class="wide" type="hidden" name="remote">
<input class="wide" type="hidden" name="local">
<input type="hidden" name="bintext" value="b" id="bintext_b">
<input type="hidden" name="deletefile" value="1" id="radio_del" $checked_del>
<dl>
<dt>Send file to:</dt>
<dd><input type="text" name="requireddest"></dd>
<dt>Additional message:</dt>
<dd><textarea name="text"></textarea></dd>
<dd><input type="submit" value="Send" id="subMit"></dd>
</dl>
<input type="hidden" name="action" value="mirror">

</form>

</fieldset>
<p><a href="javascript:history.go(-1)"><< go back</a></p>

</div>
HTML;
}

function html() {
    print <<<HTML
<html>
<head>
<title>File Sender</title>
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
function checkrequired(which) {
var pass=true;
if (document.images) {
for (i=0;i<which.length;i++) {
var tempobj=which.elements[i];
if (tempobj.name.substring(0,8)=="required") {
if (((tempobj.type=="text"||tempobj.type=="textarea")&&
tempobj.value=='')||(tempobj.type.toString().charAt(0)=="s"&&
tempobj.selectedIndex==0)) {
pass=false;
break;
         }
      }
   }
}
if (!pass) {
shortFieldName=tempobj.name.substring(8,30).toUpperCase();
alert("Please make sure you enter the destination email in the field: Send file to:.");
return false;
}
else
return true;
}
//  End -->
</script>
</head>
<body>

<style type="text/css">
body {background-color:#fff;text-align:center;color:#000;font-family:verdana,arial,sans-serif;font-size: 70%;}
dl {font-size: 1em;padding: 2px 0 5px 0; text-align: center; font-family:verdana,arial,sans-serif;}
input, textarea {width: 200px;border: 1px solid #ccc;background: #f1f1f1;}
form input#subMit {width: 70px;font-weight: bold;margin-top: 10px;font-size: 1em;}
dt {margin: 3px 0 0 0;font-size: 1.1em;}
dd {margin: 0;padding-top: 3px;}
fieldset {	background-color: #fff;border: 1px solid #ccc;}
legend {padding: 4px;border: 1px solid #ccc;font-size: 1.1em;background-color: #fff;}
p {text-align:left; font-size: 1.1em;}
</style>
<div id="log">
HTML;
}
?>