preview.php
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<?php
/**
* 此页面用来协助 IE6/7 预览图片，因为 IE 6/7 不支持 base64
*/
$DIR = 'preview';
// Create target dir
if (!file_exists($DIR)) {
@mkdir($DIR);
}
$cleanupTargetDir = true; // Remove old files
$maxFileAge = 5 * 3600; // Temp file age in seconds
if ($cleanupTargetDir) {
if (!is_dir($DIR) || !$dir = opendir($DIR)) {
die('{"jsonrpc" : "2.0", "error" : {"code": 100, "message": "Failed to open temp directory."}, "id" : "id"}');
}
while (($file = readdir($dir)) !== false) {
$tmpfilePath = $DIR . DIRECTORY_SEPARATOR . $file;
// Remove temp file if it is older than the max age and is not the current file
if (@filemtime($tmpfilePath) < time() - $maxFileAge) {
@unlink($tmpfilePath);
}
}
closedir($dir);
}
$src = file_get_contents('php://input');
if (preg_match("#^data:image/(\w+);base64,(.*)$#", $src, $matches)) {
$previewUrl = sprintf(
"%s://%s%s",
isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off' ? 'https' : 'http',
$_SERVER['HTTP_HOST'],
$_SERVER['REQUEST_URI']
);
$previewUrl = str_replace("preview.php", "", $previewUrl);
$base64 = $matches[2];
$type = $matches[1];
if ($type === 'jpeg') {
$type = 'jpg';
}
$filename = md5($base64).".$type";
$filePath = $DIR.DIRECTORY_SEPARATOR.$filename;
if (file_exists($filePath)) {
die('{"jsonrpc" : "2.0", "result" : "'.$previewUrl.'preview/'.$filename.'", "id" : "id"}');
} else {
$data = base64_decode($base64);
file_put_contents($filePath, $data);
die('{"jsonrpc" : "2.0", "result" : "'.$previewUrl.'preview/'.$filename.'", "id" : "id"}');
}
} else {
die('{"jsonrpc" : "2.0", "error" : {"code": 100, "message": "un recoginized source"}}');
}