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我正在创建页面,用户可以上传/下载存储在mysql数据库中的pdf文件,当我下载文件时,它变得损坏/损坏的问题为什么存储在mysql数据库中的PDF文件在下载时被损坏/损坏?
NP:存储为blob的文件数据数据库。
下面是我的代码:
// Gather all required data
$name = $dbLink->real_escape_string($_FILES['uploaded_file']['name']);
$mime = $dbLink->real_escape_string($_FILES['uploaded_file']['type']);
$data = $dbLink->real_escape_string(file_get_contents($_FILES ['uploaded_file']['tmp_name']));
$size = intval($_FILES['uploaded_file']['size']);
// Create the SQL query
$query = "
INSERT INTO `file` (
`name`, `mime`, `size`, `data`, `created`
)
VALUES (
'{$name}', '{$mime}', {$size}, '{$data}', NOW()
)";
// Execute the query
$result = $dbLink->query($query);
// Check if it was successfull
if($result) {
echo 'Success! Your file was successfully added!';
}
else {
echo 'Error! Failed to insert the file'
. "<pre>{$dbLink->error}</pre>";
}
}
else {
echo 'An error accured while the file was being uploaded. '
. 'Error code: '. intval($_FILES['uploaded_file']['error']);
}
// Close the mysql connection
$dbLink->close();
}
else {
echo 'Error! A file was not sent!';
}
download code:
// Fetch the file information
$query = "
SELECT `mime`, `name`, `size`, `data`
FROM `file`
WHERE `id` = {$id}";
$result = $dbLink->query($query);
if($result) {
// Make sure the result is valid
if($result->num_rows == 1) {
// Get the row
$row = mysqli_fetch_assoc($result);
// Print headers
//header('Content-Type: application/pdf');
header("Content-Type: application/force-download");
header("Pragma: public");
header("Content-Description: File Transfer");
header("Content-Type: ".$row['mime']);
header("Content-Length: ".$row['size']);
header("Content-Disposition: attachment; filename=".$row['name']);
header("Content-Transfer-Encoding: binary");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
// Print data
@readfile($row['data']);
}
else {
echo 'Error! No file exists with that ID.';
}
// Free the mysqli resources
@mysqli_free_result($result);
}
else {
echo "Error! Query failed: <pre>{$dbLink->error}</pre>";
}
@mysqli_close($dbLink);
}
}
else {
echo 'Error! No ID was passed.';
}
糟糕的想法来存储在数据库中的文件内容,请参阅http://stackoverflow.com/questions/3748/storing-images-in-db-yea-or-nay – 2012-03-15 02:33:14
@ Bubby4j这是一个学校项目,所以我没有选择:S – 2012-03-15 02:40:25
保存为blob? – EGHDK 2012-07-08 01:53:17