我有一个C#应用程序,可以截取屏幕截图并创建图像文件。我似乎无法找到如何使用cheverto的upload.php创建文件路径传递的上传方法。 Cheverto只是一个图像库系统。
以下是存储在我服务器上的upload.php:https://chevereto.com/docs/api-v1
<?php
namespace CHV;
use G, Exception;
class Upload {
// filename => name.ext
// file => /full/path/to/name.ext
// name => name
public $source;
public $uploaded;
// Sets the type of resource being uploaded
public function setType($type) {
$this->type = $type;
}
// Set source
public function setSource($source) {
$this->source = $source;
$this->type = G\is_url($this->source) ? 'url' : 'file';
}
// Set destination
public function setDestination($destination) {
$this->destination = G\forward_slash($destination);
}
// Set storage
public function setStorageId($storage_id) {
$this->storage_id = is_numeric($storage_id) ? $storage_id : NULL;
}
// Set file basename
public function setFilename($name) {
$this->name = $name;
}
// Set options
public function setOptions($options) {
$this->options = $options;
}
// Set individual option
public function setOption($key, $value) {
$this->options[$key] = $value;
}
// Default options
public static function getDefaultOptions() {
return array(
'max_size' => G\get_bytes('2 MB'), // it should be 'max_filesize'
'filenaming' => 'original',
'exif' => TRUE,
'allowed_formats' => self::getAvailableImageFormats(), // array
);
}
/**
* Do the thing
* @Exeption 4xx
*/
public function exec() {
// Merge options
$this->options = array_merge(self::getDefaultOptions(), (array) $this->options);
$this->validateInput(); // Exception 1
$this->fetchSource(); // Exception 2
$this->validateSourceFile(); // Exception 3
if(!is_array($this->options['allowed_formats'])) {
$this->options['allowed_formats'] = explode(',', $this->options['allowed_formats']);
}
// Save the source name
$this->source_name = G\get_filename_without_extension($this->type == "url" ? $this->source : $this->source["name"]);
// Set file extension
$this->extension = $this->source_image_fileinfo["extension"];
// Workaround the $name
if(!$this->name) {
$this->name = $this->source_name;
}
// Fix conflicting starting dots (some Apache installs)
$this->name = ltrim($this->name, '.');
// Fix file extension
if(G\get_file_extension($this->name) == $this->extension) {
$this->name = G\get_filename_without_extension($this->name);
}
// Set the fixed filename
$this->fixed_filename = preg_replace('/(.*)\.(th|md|original|lg)\.([\w]+)$/', '$1.$3', $this->name . '.' . $this->extension);
// Workaround for JPEG Exif data
if($this->extension == 'jpg' and array_key_exists('exif', $this->options)) {
$this->source_image_exif = NULL;
if($this->options['exif']) {
// Fetch JPEG Exif data (when available)
if(function_exists('exif_read_data')) {
$this->source_image_exif = @exif_read_data($this->downstream);
if($this->source_image_exif) {
$this->source_image_exif['FileName'] = $this->source_filename;
}
}
} else {
// Remove JPEG Exif data
$img = imagecreatefromjpeg($this->downstream);
if($img) {
imagejpeg($img, $this->downstream, 90);
imagedestroy($img);
}
}
}
/*
* Set uploaded_file
* Local storage uploads will be allocated at the target destination
* External storage will be allocated to the temp directory
*/
$this->uploaded_file = G\name_unique_file($this->destination, $this->options['filenaming'], $this->fixed_filename);
$this->source = [
'filename' => $this->source_filename, // file.ext
'name' => $this->source_name, // file
'image_exif' => $this->source_image_exif, // exif-data array
'fileinfo' => G\get_image_fileinfo($this->downstream), // fileinfo array
];
// Fix image orientation
if($this->source_image_exif and $this->source_image_exif["Orientation"]) {
$this->fixImageOrientation($this->downstream, $this->source_image_exif);
}
$uploaded = @rename($this->downstream, $this->uploaded_file);
@unlink($this->downstream);
if(file_exists($this->downstream)) {
error_log("Warning: temp file " . $this->downstream . "wasn't removed.");
}
if(!$uploaded) {
throw new UploadException("Can't move temp file to its destination", 400);
}
// For some PHP environments
if(!$this->storage_id) {
@chmod($this->uploaded_file, 0644);
}
$this->uploaded = array(
'file' => $this->uploaded_file,
'filename' => G\get_filename($this->uploaded_file),
'name' => G\get_filename_without_extension($this->uploaded_file),
'fileinfo' => G\get_image_fileinfo($this->uploaded_file)
);
}
// Get available (supported) extensions
public static function getAvailableImageFormats() {
$formats = Settings::get('upload_available_image_formats');
return explode(',', $formats);
}
// Failover since v3.8.12
public static function getEnabledImageFormats() {
return Image::getEnabledImageFormats();
}
/**
* validate_input aka "first stage validation"
* This checks for valid input source data
* @Exception 1XX
*/
protected function validateInput() {
$check_missing = ["type", "source", "destination"];
missing_values_to_exception($this, "CHV\UploadException", $check_missing, 100);
// Validate $type
if(!preg_match("/^(url|file)$/", $this->type)) {
throw new UploadException('Invalid $type "'.$this->type.'"', 110);
}
// Handle flood
$flood = self::handleFlood();
if($flood) {
throw new UploadException(strtr('Flood detected. You can only upload %limit% images per %time%', ['%limit%' => $flood['limit'], '%time%' => $flood['by']]), 130);
}
// Validate $source
if($this->type == 'file') {
if(count($this->source) < 5) { // Valid $_FILES ?
throw new UploadException("Invalid file source", 120);
}
} else if($this->type == "url") {
if(!G\is_image_url($this->source) && !G\is_url($this->source)) {
throw new UploadException("Invalid image URL", 122);
}
}
// Validate $destination
if(!is_dir($this->destination)) { // Try to create the missing directory
$base_dir = G\add_ending_slash(G_ROOT_PATH . explode('/', preg_replace('#'.G_ROOT_PATH.'#', '', $this->destination, 1))[0]);
$base_perms = fileperms($base_dir);
$old_umask = umask(0);
$make_destination = mkdir($this->destination, $base_perms, true);
chmod($this->destination, $base_perms);
umask($old_umask);
if(!$make_destination) {
throw new UploadException('$destination '.$this->destination.' is not a dir', 130);
}
}
// Can read $destination dir?
if(!is_readable($this->destination)) {
throw new UploadException("Can't read target destination dir", 131);
}
// Can write $destination dir?
if(!is_writable($this->destination)) {
throw new UploadException("Can't write target destination dir", 132);
}
// Fix $destination trailing
$this->destination = G\add_ending_slash($this->destination);
}
/**
* Fetch the $source file
* @Exception 2XX
*/
protected function fetchSource() {
// Set the downstream file
$this->downstream = @tempnam(sys_get_temp_dir(), 'chvtemp');
if(!$this->downstream || !@is_writable($this->downstream)) {
$this->downstream = @tempnam($this->destination, 'chvtemp');
if(!$this->downstream) {
throw new UploadException("Can't get a tempnam", 200);
}
}
if($this->type == 'file') {
if($this->source['error'] !== UPLOAD_ERR_OK) {
switch($this->source['error']) {
case UPLOAD_ERR_INI_SIZE: // 1
throw new UploadException('File too big', 201);
break;
case UPLOAD_ERR_FORM_SIZE: // 2
throw new UploadException('File exceeds form max size', 201);
break;
case UPLOAD_ERR_PARTIAL: // 3
throw new UploadException('File was partially uploaded', 201);
break;
case UPLOAD_ERR_NO_FILE: // 4
throw new UploadException('No file was uploaded', 201);
break;
case UPLOAD_ERR_NO_TMP_DIR: // 5
throw new UploadException('Missing temp folder', 201);
break;
case UPLOAD_ERR_CANT_WRITE: // 6
throw new UploadException('System write error', 201);
break;
case UPLOAD_ERR_EXTENSION: // 7
throw new UploadException('The upload was stopped', 201);
break;
}
}
if(!@rename($this->source['tmp_name'], $this->downstream)) {
throw new UploadException("Can't move temp file to the target upload dir", 203);
}
} else if($this->type == "url") {
try {
G\fetch_url($this->source, $this->downstream);
} catch(Exception $e) {
throw new UploadException($e->getMessage(), 202);
}
}
$this->source_filename = basename($this->type == "file" ? $this->source["name"] : $this->source);
}
protected function fixImageOrientation($image_filename, $exif) {
if($exif['Orientation'] == 1) return;
switch($this->extension) {
case 'jpg':
$image = imagecreatefromjpeg($image_filename);
break;
}
switch($exif['Orientation']) {
case 3:
$image = imagerotate($image, 180, 0);
break;
case 6:
$image = imagerotate($image, -90, 0);
break;
case 8:
$image = imagerotate($image, 90, 0);
break;
}
imagejpeg($image, $image_filename, 90);
}
/**
* validate_source_file aka "second stage validation"
* This checks for valid input source data
* @Exception 3XX
*/
protected function validateSourceFile() {
// Nothing to do here
if(!file_exists($this->downstream)) {
throw new UploadException("Can't fetch target upload source (downstream)", 300);
}
$this->source_image_fileinfo = G\get_image_fileinfo($this->downstream);
// file info?
if(!$this->source_image_fileinfo) {
throw new UploadException("Can't get target upload source info", 310);
}
// Valid image fileinto?
if($this->source_image_fileinfo['width'] == '' || $this->source_image_fileinfo['height'] == '') {
throw new UploadException("Invalid image", 311);
}
// Available image format?
if(!in_array($this->source_image_fileinfo['extension'], self::getAvailableImageFormats())) {
throw new UploadException("Unavailable image format", 313);
}
// Enabled image format?
if(!in_array($this->source_image_fileinfo['extension'], $this->options['allowed_formats'])) {
throw new UploadException(sprintf("Disabled image format (%s)", $this->source_image_fileinfo['extension']), 314);
}
// Mime
if(!$this->isValidImageMime($this->source_image_fileinfo["mime"])) {
throw new UploadException("Invalid image mimetype", 312);
}
// Size
if(!$this->options['max_size']) {
$this->options['max_size'] = self::getDefaultOptions()['max_size'];
}
if($this->source_image_fileinfo["size"] > $this->options["max_size"]) {
throw new UploadException("File too big - max " . G\format_bytes($this->options["max_size"]), 313);
}
// BMP?
if($this->source_image_fileinfo['extension'] == 'bmp') {
$this->ImageConvert = new ImageConvert($this->downstream, "png", $this->downstream);
$this->downstream = $this->ImageConvert->out;
$this->source_image_fileinfo = G\get_image_fileinfo($this->downstream);
}
}
// Handle flood uploads
protected static function handleFlood() {
$logged_user = Login::getUser();
if(!getSetting('flood_uploads_protection') || $logged_user['is_admin']) {
return FALSE;
}
$flood_limit = [];
foreach(['minute', 'hour', 'day', 'week', 'month'] as $v) {
$flood_limit[$v] = getSetting('flood_uploads_' . $v);
}
try {
$db = DB::getInstance();
$flood_db = $db->queryFetchSingle(
"SELECT
COUNT(IF(image_date_gmt >= DATE_SUB(UTC_TIMESTAMP(), INTERVAL 1 MINUTE), 1, NULL)) AS minute,
COUNT(IF(image_date_gmt >= DATE_SUB(UTC_TIMESTAMP(), INTERVAL 1 HOUR), 1, NULL)) AS hour,
COUNT(IF(image_date_gmt >= DATE_SUB(UTC_TIMESTAMP(), INTERVAL 1 DAY), 1, NULL)) AS day,
COUNT(IF(image_date_gmt >= DATE_SUB(UTC_TIMESTAMP(), INTERVAL 1 WEEK), 1, NULL)) AS week,
COUNT(IF(image_date_gmt >= DATE_SUB(UTC_TIMESTAMP(), INTERVAL 1 MONTH), 1, NULL)) AS month
FROM ".DB::getTable('images')." WHERE image_uploader_ip='".G\get_client_ip()."' AND image_date_gmt >= DATE_SUB(UTC_TIMESTAMP(), INTERVAL 1 MONTH)");
} catch(Exception $e) {} // Silence
$is_flood = FALSE;
$flood_by = '';
foreach(['minute', 'hour', 'day', 'week', 'month'] as $v) {
if($flood_limit[$v] > 0 and $flood_db[$v] >= $flood_limit[$v]) {
$flood_by = $v;
$is_flood = TRUE;
break;
}
}
if($is_flood) {
if(getSetting('flood_uploads_notify') and !$_SESSION['flood_uploads_notify'][$flood_by]) {
try {
$message = strtr('Flooding IP <a href="'.G\get_base_url('search/images/?q=ip:%ip').'">%ip</a>', ['%ip' => G\get_client_ip()]) . '<br>';
if($logged_user) {
$message .= 'User <a href="'.$logged_user['url'].'">'.$logged_user['name'].'</a><br>';
}
$message .= '<br>';
$message .= '<b>Uploads per time period</b>'."<br>";
$message .= 'Minute: '.$flood_db['minute']."<br>";
$message .= 'Hour: '.$flood_db['hour']."<br>";
$message .= 'Week: '.$flood_db['day']."<br>";
$message .= 'Month: '.$flood_db['week']."<br>";
system_notification_email(['subject' => 'Flood report IP '. G\get_client_ip(), 'message' => $message]);
$_SESSION['flood_uploads_notify'][$flood_by] = true;
} catch(Exception $e) {} // Silence
}
return ['flood' => TRUE, 'limit' => $flood_limit[$flood_by], 'count' => $flood_db[$flood_by], 'by' => $flood_by];
}
return FALSE;
}
protected function isValidImageMime($mime) {
return preg_match("@image/(gif|pjpeg|jpeg|png|x-png|bmp|x-ms-bmp|x-windows-bmp)$@", $mime);
}
protected function isValidNamingOption($string) {
return in_array($string, array("mixed", "random", "original"));
}
}
class UploadException extends Exception {}
感谢您的帮助或指导!