yet another blueimp vulnerability. Move to composer.

12 files changed, 2134 insertions, 0 deletions

diff --git a/vendor/blueimp/jquery-file-upload/server/gae-go/app.yaml b/vendor/blueimp/jquery-file-upload/server/gae-go/app.yaml
new file mode 100644
index 000000000..b5ac1a2e1
--- /dev/null
+++ b/vendor/blueimp/jquery-file-upload/server/gae-go/app.yaml
@@ -0,0 +1,10 @@
+runtime: go
+api_version: go1
+
+handlers:
+- url: /(favicon\.ico|robots\.txt)
+  static_files: static/\1
+  upload: static/(.*)
+  expiration: '1d'
+- url: /.*
+  script: _go_app
diff --git a/vendor/blueimp/jquery-file-upload/server/gae-go/main.go b/vendor/blueimp/jquery-file-upload/server/gae-go/main.go
new file mode 100644
index 000000000..a92d128c0
--- /dev/null
+++ b/vendor/blueimp/jquery-file-upload/server/gae-go/main.go
@@ -0,0 +1,361 @@
+/*
+ * jQuery File Upload Plugin GAE Go Example
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2011, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+package app
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"github.com/disintegration/gift"
+	"golang.org/x/net/context"
+	"google.golang.org/appengine"
+	"google.golang.org/appengine/memcache"
+	"hash/crc32"
+	"image"
+	"image/gif"
+	"image/jpeg"
+	"image/png"
+	"io"
+	"log"
+	"mime/multipart"
+	"net/http"
+	"net/url"
+	"path/filepath"
+	"regexp"
+	"strings"
+)
+
+const (
+	WEBSITE       = "https://blueimp.github.io/jQuery-File-Upload/"
+	MIN_FILE_SIZE = 1 // bytes
+	// Max file size is memcache limit (1MB) minus key size minus overhead:
+	MAX_FILE_SIZE     = 999000 // bytes
+	IMAGE_TYPES       = "image/(gif|p?jpeg|(x-)?png)"
+	ACCEPT_FILE_TYPES = IMAGE_TYPES
+	THUMB_MAX_WIDTH   = 80
+	THUMB_MAX_HEIGHT  = 80
+	EXPIRATION_TIME   = 300 // seconds
+	// If empty, only allow redirects to the referer protocol+host.
+	// Set to a regexp string for custom pattern matching:
+	REDIRECT_ALLOW_TARGET = ""
+)
+
+var (
+	imageTypes      = regexp.MustCompile(IMAGE_TYPES)
+	acceptFileTypes = regexp.MustCompile(ACCEPT_FILE_TYPES)
+	thumbSuffix     = "." + fmt.Sprint(THUMB_MAX_WIDTH) + "x" +
+		fmt.Sprint(THUMB_MAX_HEIGHT)
+)
+
+func escape(s string) string {
+	return strings.Replace(url.QueryEscape(s), "+", "%20", -1)
+}
+
+func extractKey(r *http.Request) string {
+	// Use RequestURI instead of r.URL.Path, as we need the encoded form:
+	path := strings.Split(r.RequestURI, "?")[0]
+	// Also adjust double encoded slashes:
+	return strings.Replace(path[1:], "%252F", "%2F", -1)
+}
+
+func check(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+type FileInfo struct {
+	Key          string `json:"-"`
+	ThumbnailKey string `json:"-"`
+	Url          string `json:"url,omitempty"`
+	ThumbnailUrl string `json:"thumbnailUrl,omitempty"`
+	Name         string `json:"name"`
+	Type         string `json:"type"`
+	Size         int64  `json:"size"`
+	Error        string `json:"error,omitempty"`
+	DeleteUrl    string `json:"deleteUrl,omitempty"`
+	DeleteType   string `json:"deleteType,omitempty"`
+}
+
+func (fi *FileInfo) ValidateType() (valid bool) {
+	if acceptFileTypes.MatchString(fi.Type) {
+		return true
+	}
+	fi.Error = "Filetype not allowed"
+	return false
+}
+
+func (fi *FileInfo) ValidateSize() (valid bool) {
+	if fi.Size < MIN_FILE_SIZE {
+		fi.Error = "File is too small"
+	} else if fi.Size > MAX_FILE_SIZE {
+		fi.Error = "File is too big"
+	} else {
+		return true
+	}
+	return false
+}
+
+func (fi *FileInfo) CreateUrls(r *http.Request, c context.Context) {
+	u := &url.URL{
+		Scheme: r.URL.Scheme,
+		Host:   appengine.DefaultVersionHostname(c),
+		Path:   "/",
+	}
+	uString := u.String()
+	fi.Url = uString + fi.Key
+	fi.DeleteUrl = fi.Url
+	fi.DeleteType = "DELETE"
+	if fi.ThumbnailKey != "" {
+		fi.ThumbnailUrl = uString + fi.ThumbnailKey
+	}
+}
+
+func (fi *FileInfo) SetKey(checksum uint32) {
+	fi.Key = escape(string(fi.Type)) + "/" +
+		escape(fmt.Sprint(checksum)) + "/" +
+		escape(string(fi.Name))
+}
+
+func (fi *FileInfo) createThumb(buffer *bytes.Buffer, c context.Context) {
+	if imageTypes.MatchString(fi.Type) {
+		src, _, err := image.Decode(bytes.NewReader(buffer.Bytes()))
+		check(err)
+		filter := gift.New(gift.ResizeToFit(
+			THUMB_MAX_WIDTH,
+			THUMB_MAX_HEIGHT,
+			gift.LanczosResampling,
+		))
+		dst := image.NewNRGBA(filter.Bounds(src.Bounds()))
+		filter.Draw(dst, src)
+		buffer.Reset()
+		bWriter := bufio.NewWriter(buffer)
+		switch fi.Type {
+		case "image/jpeg", "image/pjpeg":
+			err = jpeg.Encode(bWriter, dst, nil)
+		case "image/gif":
+			err = gif.Encode(bWriter, dst, nil)
+		default:
+			err = png.Encode(bWriter, dst)
+		}
+		check(err)
+		bWriter.Flush()
+		thumbnailKey := fi.Key + thumbSuffix + filepath.Ext(fi.Name)
+		item := &memcache.Item{
+			Key:   thumbnailKey,
+			Value: buffer.Bytes(),
+		}
+		err = memcache.Set(c, item)
+		check(err)
+		fi.ThumbnailKey = thumbnailKey
+	}
+}
+
+func handleUpload(r *http.Request, p *multipart.Part) (fi *FileInfo) {
+	fi = &FileInfo{
+		Name: p.FileName(),
+		Type: p.Header.Get("Content-Type"),
+	}
+	if !fi.ValidateType() {
+		return
+	}
+	defer func() {
+		if rec := recover(); rec != nil {
+			log.Println(rec)
+			fi.Error = rec.(error).Error()
+		}
+	}()
+	var buffer bytes.Buffer
+	hash := crc32.NewIEEE()
+	mw := io.MultiWriter(&buffer, hash)
+	lr := &io.LimitedReader{R: p, N: MAX_FILE_SIZE + 1}
+	_, err := io.Copy(mw, lr)
+	check(err)
+	fi.Size = MAX_FILE_SIZE + 1 - lr.N
+	if !fi.ValidateSize() {
+		return
+	}
+	fi.SetKey(hash.Sum32())
+	item := &memcache.Item{
+		Key:   fi.Key,
+		Value: buffer.Bytes(),
+	}
+	context := appengine.NewContext(r)
+	err = memcache.Set(context, item)
+	check(err)
+	fi.createThumb(&buffer, context)
+	fi.CreateUrls(r, context)
+	return
+}
+
+func getFormValue(p *multipart.Part) string {
+	var b bytes.Buffer
+	io.CopyN(&b, p, int64(1<<20)) // Copy max: 1 MiB
+	return b.String()
+}
+
+func handleUploads(r *http.Request) (fileInfos []*FileInfo) {
+	fileInfos = make([]*FileInfo, 0)
+	mr, err := r.MultipartReader()
+	check(err)
+	r.Form, err = url.ParseQuery(r.URL.RawQuery)
+	check(err)
+	part, err := mr.NextPart()
+	for err == nil {
+		if name := part.FormName(); name != "" {
+			if part.FileName() != "" {
+				fileInfos = append(fileInfos, handleUpload(r, part))
+			} else {
+				r.Form[name] = append(r.Form[name], getFormValue(part))
+			}
+		}
+		part, err = mr.NextPart()
+	}
+	return
+}
+
+func validateRedirect(r *http.Request, redirect string) bool {
+	if redirect != "" {
+		var redirectAllowTarget *regexp.Regexp
+		if REDIRECT_ALLOW_TARGET != "" {
+			redirectAllowTarget = regexp.MustCompile(REDIRECT_ALLOW_TARGET)
+		} else {
+			referer := r.Referer()
+			if referer == "" {
+				return false
+			}
+			refererUrl, err := url.Parse(referer)
+			if err != nil {
+				return false
+			}
+			redirectAllowTarget = regexp.MustCompile("^" + regexp.QuoteMeta(
+				refererUrl.Scheme+"://"+refererUrl.Host+"/",
+			))
+		}
+		return redirectAllowTarget.MatchString(redirect)
+	}
+	return false
+}
+
+func get(w http.ResponseWriter, r *http.Request) {
+	if r.URL.Path == "/" {
+		http.Redirect(w, r, WEBSITE, http.StatusFound)
+		return
+	}
+	// Use RequestURI instead of r.URL.Path, as we need the encoded form:
+	key := extractKey(r)
+	parts := strings.Split(key, "/")
+	if len(parts) == 3 {
+		context := appengine.NewContext(r)
+		item, err := memcache.Get(context, key)
+		if err == nil {
+			w.Header().Add("X-Content-Type-Options", "nosniff")
+			contentType, _ := url.QueryUnescape(parts[0])
+			if !imageTypes.MatchString(contentType) {
+				contentType = "application/octet-stream"
+			}
+			w.Header().Add("Content-Type", contentType)
+			w.Header().Add(
+				"Cache-Control",
+				fmt.Sprintf("public,max-age=%d", EXPIRATION_TIME),
+			)
+			w.Write(item.Value)
+			return
+		}
+	}
+	http.Error(w, "404 Not Found", http.StatusNotFound)
+}
+
+func post(w http.ResponseWriter, r *http.Request) {
+	result := make(map[string][]*FileInfo, 1)
+	result["files"] = handleUploads(r)
+	b, err := json.Marshal(result)
+	check(err)
+	if redirect := r.FormValue("redirect"); validateRedirect(r, redirect) {
+		if strings.Contains(redirect, "%s") {
+			redirect = fmt.Sprintf(
+				redirect,
+				escape(string(b)),
+			)
+		}
+		http.Redirect(w, r, redirect, http.StatusFound)
+		return
+	}
+	w.Header().Set("Cache-Control", "no-cache")
+	jsonType := "application/json"
+	if strings.Index(r.Header.Get("Accept"), jsonType) != -1 {
+		w.Header().Set("Content-Type", jsonType)
+	}
+	fmt.Fprintln(w, string(b))
+}
+
+func delete(w http.ResponseWriter, r *http.Request) {
+	key := extractKey(r)
+	parts := strings.Split(key, "/")
+	if len(parts) == 3 {
+		result := make(map[string]bool, 1)
+		context := appengine.NewContext(r)
+		err := memcache.Delete(context, key)
+		if err == nil {
+			result[key] = true
+			contentType, _ := url.QueryUnescape(parts[0])
+			if imageTypes.MatchString(contentType) {
+				thumbnailKey := key + thumbSuffix + filepath.Ext(parts[2])
+				err := memcache.Delete(context, thumbnailKey)
+				if err == nil {
+					result[thumbnailKey] = true
+				}
+			}
+		}
+		w.Header().Set("Content-Type", "application/json")
+		b, err := json.Marshal(result)
+		check(err)
+		fmt.Fprintln(w, string(b))
+	} else {
+		http.Error(w, "405 Method not allowed", http.StatusMethodNotAllowed)
+	}
+}
+
+func handle(w http.ResponseWriter, r *http.Request) {
+	params, err := url.ParseQuery(r.URL.RawQuery)
+	check(err)
+	w.Header().Add("Access-Control-Allow-Origin", "*")
+	w.Header().Add(
+		"Access-Control-Allow-Methods",
+		"OPTIONS, HEAD, GET, POST, DELETE",
+	)
+	w.Header().Add(
+		"Access-Control-Allow-Headers",
+		"Content-Type, Content-Range, Content-Disposition",
+	)
+	switch r.Method {
+	case "OPTIONS", "HEAD":
+		return
+	case "GET":
+		get(w, r)
+	case "POST":
+		if len(params["_method"]) > 0 && params["_method"][0] == "DELETE" {
+			delete(w, r)
+		} else {
+			post(w, r)
+		}
+	case "DELETE":
+		delete(w, r)
+	default:
+		http.Error(w, "501 Not Implemented", http.StatusNotImplemented)
+	}
+}
+
+func init() {
+	http.HandleFunc("/", handle)
+}
diff --git a/vendor/blueimp/jquery-file-upload/server/gae-go/static/robots.txt b/vendor/blueimp/jquery-file-upload/server/gae-go/static/robots.txt
new file mode 100644
index 000000000..eb0536286
--- /dev/null
+++ b/vendor/blueimp/jquery-file-upload/server/gae-go/static/robots.txt
@@ -0,0 +1,2 @@
+User-agent: *
+Disallow:
diff --git a/vendor/blueimp/jquery-file-upload/server/gae-python/app.yaml b/vendor/blueimp/jquery-file-upload/server/gae-python/app.yaml
new file mode 100644
index 000000000..0c49462fa
--- /dev/null
+++ b/vendor/blueimp/jquery-file-upload/server/gae-python/app.yaml
@@ -0,0 +1,15 @@
+runtime: python27
+api_version: 1
+threadsafe: true
+
+libraries:
+- name: PIL
+  version: latest
+
+handlers:
+- url: /(favicon\.ico|robots\.txt)
+  static_files: static/\1
+  upload: static/(.*)
+  expiration: '1d'
+- url: /.*
+  script: main.app
diff --git a/vendor/blueimp/jquery-file-upload/server/gae-python/main.py b/vendor/blueimp/jquery-file-upload/server/gae-python/main.py
new file mode 100644
index 000000000..1955ac00a
--- /dev/null
+++ b/vendor/blueimp/jquery-file-upload/server/gae-python/main.py
@@ -0,0 +1,204 @@
+# -*- coding: utf-8 -*-
+#
+# jQuery File Upload Plugin GAE Python Example
+# https://github.com/blueimp/jQuery-File-Upload
+#
+# Copyright 2011, Sebastian Tschan
+# https://blueimp.net
+#
+# Licensed under the MIT license:
+# https://opensource.org/licenses/MIT
+#
+
+from google.appengine.api import memcache, images
+import json
+import os
+import re
+import urllib
+import webapp2
+
+DEBUG=os.environ.get('SERVER_SOFTWARE', '').startswith('Dev')
+WEBSITE = 'https://blueimp.github.io/jQuery-File-Upload/'
+MIN_FILE_SIZE = 1  # bytes
+# Max file size is memcache limit (1MB) minus key size minus overhead:
+MAX_FILE_SIZE = 999000  # bytes
+IMAGE_TYPES = re.compile('image/(gif|p?jpeg|(x-)?png)')
+ACCEPT_FILE_TYPES = IMAGE_TYPES
+THUMB_MAX_WIDTH = 80
+THUMB_MAX_HEIGHT = 80
+THUMB_SUFFIX = '.'+str(THUMB_MAX_WIDTH)+'x'+str(THUMB_MAX_HEIGHT)+'.png'
+EXPIRATION_TIME = 300  # seconds
+# If set to None, only allow redirects to the referer protocol+host.
+# Set to a regexp for custom pattern matching against the redirect value:
+REDIRECT_ALLOW_TARGET = None
+
+class CORSHandler(webapp2.RequestHandler):
+    def cors(self):
+        headers = self.response.headers
+        headers['Access-Control-Allow-Origin'] = '*'
+        headers['Access-Control-Allow-Methods'] =\
+            'OPTIONS, HEAD, GET, POST, DELETE'
+        headers['Access-Control-Allow-Headers'] =\
+            'Content-Type, Content-Range, Content-Disposition'
+
+    def initialize(self, request, response):
+        super(CORSHandler, self).initialize(request, response)
+        self.cors()
+
+    def json_stringify(self, obj):
+        return json.dumps(obj, separators=(',', ':'))
+
+    def options(self, *args, **kwargs):
+        pass
+
+class UploadHandler(CORSHandler):
+    def validate(self, file):
+        if file['size'] < MIN_FILE_SIZE:
+            file['error'] = 'File is too small'
+        elif file['size'] > MAX_FILE_SIZE:
+            file['error'] = 'File is too big'
+        elif not ACCEPT_FILE_TYPES.match(file['type']):
+            file['error'] = 'Filetype not allowed'
+        else:
+            return True
+        return False
+
+    def validate_redirect(self, redirect):
+        if redirect:
+            if REDIRECT_ALLOW_TARGET:
+                return REDIRECT_ALLOW_TARGET.match(redirect)
+            referer = self.request.headers['referer']
+            if referer:
+                from urlparse import urlparse
+                parts = urlparse(referer)
+                redirect_allow_target = '^' + re.escape(
+                    parts.scheme + '://' + parts.netloc + '/'
+                )
+            return re.match(redirect_allow_target, redirect)
+        return False
+
+    def get_file_size(self, file):
+        file.seek(0, 2)  # Seek to the end of the file
+        size = file.tell()  # Get the position of EOF
+        file.seek(0)  # Reset the file position to the beginning
+        return size
+
+    def write_blob(self, data, info):
+        key = urllib.quote(info['type'].encode('utf-8'), '') +\
+            '/' + str(hash(data)) +\
+            '/' + urllib.quote(info['name'].encode('utf-8'), '')
+        try:
+            memcache.set(key, data, time=EXPIRATION_TIME)
+        except: #Failed to add to memcache
+            return (None, None)
+        thumbnail_key = None
+        if IMAGE_TYPES.match(info['type']):
+            try:
+                img = images.Image(image_data=data)
+                img.resize(
+                    width=THUMB_MAX_WIDTH,
+                    height=THUMB_MAX_HEIGHT
+                )
+                thumbnail_data = img.execute_transforms()
+                thumbnail_key = key + THUMB_SUFFIX
+                memcache.set(
+                    thumbnail_key,
+                    thumbnail_data,
+                    time=EXPIRATION_TIME
+                )
+            except: #Failed to resize Image or add to memcache
+                thumbnail_key = None
+        return (key, thumbnail_key)
+
+    def handle_upload(self):
+        results = []
+        for name, fieldStorage in self.request.POST.items():
+            if type(fieldStorage) is unicode:
+                continue
+            result = {}
+            result['name'] = urllib.unquote(fieldStorage.filename)
+            result['type'] = fieldStorage.type
+            result['size'] = self.get_file_size(fieldStorage.file)
+            if self.validate(result):
+                key, thumbnail_key = self.write_blob(
+                    fieldStorage.value,
+                    result
+                )
+                if key is not None:
+                    result['url'] = self.request.host_url + '/' + key
+                    result['deleteUrl'] = result['url']
+                    result['deleteType'] = 'DELETE'
+                    if thumbnail_key is not None:
+                        result['thumbnailUrl'] = self.request.host_url +\
+                             '/' + thumbnail_key
+                else:
+                    result['error'] = 'Failed to store uploaded file.'
+            results.append(result)
+        return results
+
+    def head(self):
+        pass
+
+    def get(self):
+        self.redirect(WEBSITE)
+
+    def post(self):
+        if (self.request.get('_method') == 'DELETE'):
+            return self.delete()
+        result = {'files': self.handle_upload()}
+        s = self.json_stringify(result)
+        redirect = self.request.get('redirect')
+        if self.validate_redirect(redirect):
+            return self.redirect(str(
+                redirect.replace('%s', urllib.quote(s, ''), 1)
+            ))
+        if 'application/json' in self.request.headers.get('Accept'):
+            self.response.headers['Content-Type'] = 'application/json'
+        self.response.write(s)
+
+class FileHandler(CORSHandler):
+    def normalize(self, str):
+        return urllib.quote(urllib.unquote(str), '')
+
+    def get(self, content_type, data_hash, file_name):
+        content_type = self.normalize(content_type)
+        file_name = self.normalize(file_name)
+        key = content_type + '/' + data_hash + '/' + file_name
+        data = memcache.get(key)
+        if data is None:
+            return self.error(404)
+        # Prevent browsers from MIME-sniffing the content-type:
+        self.response.headers['X-Content-Type-Options'] = 'nosniff'
+        content_type = urllib.unquote(content_type)
+        if not IMAGE_TYPES.match(content_type):
+            # Force a download dialog for non-image types:
+            content_type = 'application/octet-stream'
+        elif file_name.endswith(THUMB_SUFFIX):
+            content_type = 'image/png'
+        self.response.headers['Content-Type'] = content_type
+        # Cache for the expiration time:
+        self.response.headers['Cache-Control'] = 'public,max-age=%d' \
+            % EXPIRATION_TIME
+        self.response.write(data)
+
+    def delete(self, content_type, data_hash, file_name):
+        content_type = self.normalize(content_type)
+        file_name = self.normalize(file_name)
+        key = content_type + '/' + data_hash + '/' + file_name
+        result = {key: memcache.delete(key)}
+        content_type = urllib.unquote(content_type)
+        if IMAGE_TYPES.match(content_type):
+            thumbnail_key = key + THUMB_SUFFIX
+            result[thumbnail_key] = memcache.delete(thumbnail_key)
+        if 'application/json' in self.request.headers.get('Accept'):
+            self.response.headers['Content-Type'] = 'application/json'
+        s = self.json_stringify(result)
+        self.response.write(s)
+
+app = webapp2.WSGIApplication(
+    [
+        ('/', UploadHandler),
+        ('/(.+)/([^/]+)/([^/]+)', FileHandler)
+    ],
+    debug=DEBUG
+)
diff --git a/vendor/blueimp/jquery-file-upload/server/gae-python/static/robots.txt b/vendor/blueimp/jquery-file-upload/server/gae-python/static/robots.txt
new file mode 100644
index 000000000..eb0536286
--- /dev/null
+++ b/vendor/blueimp/jquery-file-upload/server/gae-python/static/robots.txt
@@ -0,0 +1,2 @@
+User-agent: *
+Disallow:
diff --git a/vendor/blueimp/jquery-file-upload/server/php/Dockerfile b/vendor/blueimp/jquery-file-upload/server/php/Dockerfile
new file mode 100644
index 000000000..8633fee74
--- /dev/null
+++ b/vendor/blueimp/jquery-file-upload/server/php/Dockerfile
@@ -0,0 +1,38 @@
+FROM php:7-apache
+
+# Enable the Apache Headers module:
+RUN ln -s /etc/apache2/mods-available/headers.load \
+  /etc/apache2/mods-enabled/headers.load
+
+# Enable the Apache Rewrite module:
+RUN ln -s /etc/apache2/mods-available/rewrite.load \
+  /etc/apache2/mods-enabled/rewrite.load
+
+# Install GD, Imagick and ImageMagick as image conversion options:
+RUN DEBIAN_FRONTEND=noninteractive \
+  apt-get update && apt-get install -y --no-install-recommends \
+    libpng-dev \
+    libjpeg-dev \
+    libmagickwand-dev \
+    imagemagick \
+  && pecl install \
+    imagick \
+  && docker-php-ext-enable \
+    imagick \
+  && docker-php-ext-configure \
+    gd --with-jpeg-dir=/usr/include/ \
+  && docker-php-ext-install \
+    gd \
+  # Uninstall obsolete packages:
+  && apt-get autoremove -y \
+    libpng-dev \
+    libjpeg-dev \
+    libmagickwand-dev \
+  # Remove obsolete files:
+  && apt-get clean \
+  && rm -rf \
+    /tmp/* \
+    /usr/share/doc/* \
+    /var/cache/* \
+    /var/lib/apt/lists/* \
+    /var/tmp/*
diff --git a/vendor/blueimp/jquery-file-upload/server/php/UploadHandler.php b/vendor/blueimp/jquery-file-upload/server/php/UploadHandler.php
new file mode 100755
index 000000000..e44004395
--- /dev/null
+++ b/vendor/blueimp/jquery-file-upload/server/php/UploadHandler.php
@@ -0,0 +1,1449 @@
+<?php
+/*
+ * jQuery File Upload Plugin PHP Class
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2010, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+class UploadHandler
+{
+
+    protected $options;
+
+    // PHP File Upload error message codes:
+    // http://php.net/manual/en/features.file-upload.errors.php
+    protected $error_messages = array(
+        1 => 'The uploaded file exceeds the upload_max_filesize directive in php.ini',
+        2 => 'The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form',
+        3 => 'The uploaded file was only partially uploaded',
+        4 => 'No file was uploaded',
+        6 => 'Missing a temporary folder',
+        7 => 'Failed to write file to disk',
+        8 => 'A PHP extension stopped the file upload',
+        'post_max_size' => 'The uploaded file exceeds the post_max_size directive in php.ini',
+        'max_file_size' => 'File is too big',
+        'min_file_size' => 'File is too small',
+        'accept_file_types' => 'Filetype not allowed',
+        'max_number_of_files' => 'Maximum number of files exceeded',
+        'max_width' => 'Image exceeds maximum width',
+        'min_width' => 'Image requires a minimum width',
+        'max_height' => 'Image exceeds maximum height',
+        'min_height' => 'Image requires a minimum height',
+        'abort' => 'File upload aborted',
+        'image_resize' => 'Failed to resize image'
+    );
+
+    protected const IMAGETYPE_GIF = 1;
+    protected const IMAGETYPE_JPEG = 2;
+    protected const IMAGETYPE_PNG = 3;
+
+    protected $image_objects = array();
+
+    public function __construct($options = null, $initialize = true, $error_messages = null) {
+        $this->response = array();
+        $this->options = array(
+            'script_url' => $this->get_full_url().'/'.$this->basename($this->get_server_var('SCRIPT_NAME')),
+            'upload_dir' => dirname($this->get_server_var('SCRIPT_FILENAME')).'/files/',
+            'upload_url' => $this->get_full_url().'/files/',
+            'input_stream' => 'php://input',
+            'user_dirs' => false,
+            'mkdir_mode' => 0755,
+            'param_name' => 'files',
+            // Set the following option to 'POST', if your server does not support
+            // DELETE requests. This is a parameter sent to the client:
+            'delete_type' => 'DELETE',
+            'access_control_allow_origin' => '*',
+            'access_control_allow_credentials' => false,
+            'access_control_allow_methods' => array(
+                'OPTIONS',
+                'HEAD',
+                'GET',
+                'POST',
+                'PUT',
+                'PATCH',
+                'DELETE'
+            ),
+            'access_control_allow_headers' => array(
+                'Content-Type',
+                'Content-Range',
+                'Content-Disposition'
+            ),
+            // By default, allow redirects to the referer protocol+host:
+            'redirect_allow_target' => '/^'.preg_quote(
+              parse_url($this->get_server_var('HTTP_REFERER'), PHP_URL_SCHEME)
+                .'://'
+                .parse_url($this->get_server_var('HTTP_REFERER'), PHP_URL_HOST)
+                .'/', // Trailing slash to not match subdomains by mistake
+              '/' // preg_quote delimiter param
+            ).'/',
+            // Enable to provide file downloads via GET requests to the PHP script:
+            //     1. Set to 1 to download files via readfile method through PHP
+            //     2. Set to 2 to send a X-Sendfile header for lighttpd/Apache
+            //     3. Set to 3 to send a X-Accel-Redirect header for nginx
+            // If set to 2 or 3, adjust the upload_url option to the base path of
+            // the redirect parameter, e.g. '/files/'.
+            'download_via_php' => false,
+            // Read files in chunks to avoid memory limits when download_via_php
+            // is enabled, set to 0 to disable chunked reading of files:
+            'readfile_chunk_size' => 10 * 1024 * 1024, // 10 MiB
+            // Defines which files can be displayed inline when downloaded:
+            'inline_file_types' => '/\.(gif|jpe?g|png)$/i',
+            // Defines which files (based on their names) are accepted for upload.
+            // By default, only allows file uploads with image file extensions.
+            // Only change this setting after making sure that any allowed file
+            // types cannot be executed by the webserver in the files directory,
+            // e.g. PHP scripts, nor executed by the browser when downloaded,
+            // e.g. HTML files with embedded JavaScript code.
+            // Please also read the SECURITY.md document in this repository.
+            'accept_file_types' => '/\.(gif|jpe?g|png)$/i',
+            // Replaces dots in filenames with the given string.
+            // Can be disabled by setting it to false or an empty string.
+            // Note that this is a security feature for servers that support
+            // multiple file extensions, e.g. the Apache AddHandler Directive:
+            // https://httpd.apache.org/docs/current/mod/mod_mime.html#addhandler
+            // Before disabling it, make sure that files uploaded with multiple
+            // extensions cannot be executed by the webserver, e.g.
+            // "example.php.png" with embedded PHP code, nor executed by the
+            // browser when downloaded, e.g. "example.html.gif" with embedded
+            // JavaScript code.
+            'replace_dots_in_filenames' => '-',
+            // The php.ini settings upload_max_filesize and post_max_size
+            // take precedence over the following max_file_size setting:
+            'max_file_size' => null,
+            'min_file_size' => 1,
+            // The maximum number of files for the upload directory:
+            'max_number_of_files' => null,
+            // Reads first file bytes to identify and correct file extensions:
+            'correct_image_extensions' => false,
+            // Image resolution restrictions:
+            'max_width' => null,
+            'max_height' => null,
+            'min_width' => 1,
+            'min_height' => 1,
+            // Set the following option to false to enable resumable uploads:
+            'discard_aborted_uploads' => true,
+            // Set to 0 to use the GD library to scale and orient images,
+            // set to 1 to use imagick (if installed, falls back to GD),
+            // set to 2 to use the ImageMagick convert binary directly:
+            'image_library' => 1,
+            // Uncomment the following to define an array of resource limits
+            // for imagick:
+            /*
+            'imagick_resource_limits' => array(
+                imagick::RESOURCETYPE_MAP => 32,
+                imagick::RESOURCETYPE_MEMORY => 32
+            ),
+            */
+            // Command or path for to the ImageMagick convert binary:
+            'convert_bin' => 'convert',
+            // Uncomment the following to add parameters in front of each
+            // ImageMagick convert call (the limit constraints seem only
+            // to have an effect if put in front):
+            /*
+            'convert_params' => '-limit memory 32MiB -limit map 32MiB',
+            */
+            // Command or path for to the ImageMagick identify binary:
+            'identify_bin' => 'identify',
+            'image_versions' => array(
+                // The empty image version key defines options for the original image.
+                // Keep in mind: these image manipulations are inherited by all other image versions from this point onwards. 
+                // Also note that the property 'no_cache' is not inherited, since it's not a manipulation.
+                '' => array(
+                    // Automatically rotate images based on EXIF meta data:
+                    'auto_orient' => true
+                ),
+                // You can add arrays to generate different versions.
+                // The name of the key is the name of the version (example: 'medium'). 
+                // the array contains the options to apply.
+                /*
+                'medium' => array(
+                    'max_width' => 800,
+                    'max_height' => 600
+                ),
+		        */
+                'thumbnail' => array(
+                    // Uncomment the following to use a defined directory for the thumbnails
+                    // instead of a subdirectory based on the version identifier.
+                    // Make sure that this directory doesn't allow execution of files if you
+                    // don't pose any restrictions on the type of uploaded files, e.g. by
+                    // copying the .htaccess file from the files directory for Apache:
+                    //'upload_dir' => dirname($this->get_server_var('SCRIPT_FILENAME')).'/thumb/',
+                    //'upload_url' => $this->get_full_url().'/thumb/',
+                    // Uncomment the following to force the max
+                    // dimensions and e.g. create square thumbnails:
+                    // 'auto_orient' => true,
+                    // 'crop' => true,
+                    // 'jpeg_quality' => 70,
+                    // 'no_cache' => true, (there's a caching option, but this remembers thumbnail sizes from a previous action!)
+                    // 'strip' => true, (this strips EXIF tags, such as geolocation)
+                    'max_width' => 80, // either specify width, or set to 0. Then width is automatically adjusted - keeping aspect ratio to a specified max_height.
+                    'max_height' => 80 // either specify height, or set to 0. Then height is automatically adjusted - keeping aspect ratio to a specified max_width.
+                )
+            ),
+            'print_response' => true
+        );
+        if ($options) {
+            $this->options = $options + $this->options;
+        }
+        if ($error_messages) {
+            $this->error_messages = $error_messages + $this->error_messages;
+        }
+        if ($initialize) {
+            $this->initialize();
+        }
+    }
+
+    protected function initialize() {
+        switch ($this->get_server_var('REQUEST_METHOD')) {
+            case 'OPTIONS':
+            case 'HEAD':
+                $this->head();
+                break;
+            case 'GET':
+                $this->get($this->options['print_response']);
+                break;
+            case 'PATCH':
+            case 'PUT':
+            case 'POST':
+                $this->post($this->options['print_response']);
+                break;
+            case 'DELETE':
+                $this->delete($this->options['print_response']);
+                break;
+            default:
+                $this->header('HTTP/1.1 405 Method Not Allowed');
+        }
+    }
+
+    protected function get_full_url() {
+        $https = !empty($_SERVER['HTTPS']) && strcasecmp($_SERVER['HTTPS'], 'on') === 0 ||
+            !empty($_SERVER['HTTP_X_FORWARDED_PROTO']) &&
+                strcasecmp($_SERVER['HTTP_X_FORWARDED_PROTO'], 'https') === 0;
+        return
+            ($https ? 'https://' : 'http://').
+            (!empty($_SERVER['REMOTE_USER']) ? $_SERVER['REMOTE_USER'].'@' : '').
+            (isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : ($_SERVER['SERVER_NAME'].
+            ($https && $_SERVER['SERVER_PORT'] === 443 ||
+            $_SERVER['SERVER_PORT'] === 80 ? '' : ':'.$_SERVER['SERVER_PORT']))).
+            substr($_SERVER['SCRIPT_NAME'],0, strrpos($_SERVER['SCRIPT_NAME'], '/'));
+    }
+
+    protected function get_user_id() {
+        @session_start();
+        return session_id();
+    }
+
+    protected function get_user_path() {
+        if ($this->options['user_dirs']) {
+            return $this->get_user_id().'/';
+        }
+        return '';
+    }
+
+    protected function get_upload_path($file_name = null, $version = null) {
+        $file_name = $file_name ? $file_name : '';
+        if (empty($version)) {
+            $version_path = '';
+        } else {
+            $version_dir = @$this->options['image_versions'][$version]['upload_dir'];
+            if ($version_dir) {
+                return $version_dir.$this->get_user_path().$file_name;
+            }
+            $version_path = $version.'/';
+        }
+        return $this->options['upload_dir'].$this->get_user_path()
+            .$version_path.$file_name;
+    }
+
+    protected function get_query_separator($url) {
+        return strpos($url, '?') === false ? '?' : '&';
+    }
+
+    protected function get_download_url($file_name, $version = null, $direct = false) {
+        if (!$direct && $this->options['download_via_php']) {
+            $url = $this->options['script_url']
+                .$this->get_query_separator($this->options['script_url'])
+                .$this->get_singular_param_name()
+                .'='.rawurlencode($file_name);
+            if ($version) {
+                $url .= '&version='.rawurlencode($version);
+            }
+            return $url.'&download=1';
+        }
+        if (empty($version)) {
+            $version_path = '';
+        } else {
+            $version_url = @$this->options['image_versions'][$version]['upload_url'];
+            if ($version_url) {
+                return $version_url.$this->get_user_path().rawurlencode($file_name);
+            }
+            $version_path = rawurlencode($version).'/';
+        }
+        return $this->options['upload_url'].$this->get_user_path()
+            .$version_path.rawurlencode($file_name);
+    }
+
+    protected function set_additional_file_properties($file) {
+        $file->deleteUrl = $this->options['script_url']
+            .$this->get_query_separator($this->options['script_url'])
+            .$this->get_singular_param_name()
+            .'='.rawurlencode($file->name);
+        $file->deleteType = $this->options['delete_type'];
+        if ($file->deleteType !== 'DELETE') {
+            $file->deleteUrl .= '&_method=DELETE';
+        }
+        if ($this->options['access_control_allow_credentials']) {
+            $file->deleteWithCredentials = true;
+        }
+    }
+
+    // Fix for overflowing signed 32 bit integers,
+    // works for sizes up to 2^32-1 bytes (4 GiB - 1):
+    protected function fix_integer_overflow($size) {
+        if ($size < 0) {
+            $size += 2.0 * (PHP_INT_MAX + 1);
+        }
+        return $size;
+    }
+
+    protected function get_file_size($file_path, $clear_stat_cache = false) {
+        if ($clear_stat_cache) {
+            if (version_compare(PHP_VERSION, '5.3.0') >= 0) {
+                clearstatcache(true, $file_path);
+            } else {
+                clearstatcache();
+            }
+        }
+        return $this->fix_integer_overflow(filesize($file_path));
+    }
+
+    protected function is_valid_file_object($file_name) {
+        $file_path = $this->get_upload_path($file_name);
+        if (is_file($file_path) && $file_name[0] !== '.') {
+            return true;
+        }
+        return false;
+    }
+
+    protected function get_file_object($file_name) {
+        if ($this->is_valid_file_object($file_name)) {
+            $file = new \stdClass();
+            $file->name = $file_name;
+            $file->size = $this->get_file_size(
+                $this->get_upload_path($file_name)
+            );
+            $file->url = $this->get_download_url($file->name);
+            foreach ($this->options['image_versions'] as $version => $options) {
+                if (!empty($version)) {
+                    if (is_file($this->get_upload_path($file_name, $version))) {
+                        $file->{$version.'Url'} = $this->get_download_url(
+                            $file->name,
+                            $version
+                        );
+                    }
+                }
+            }
+            $this->set_additional_file_properties($file);
+            return $file;
+        }
+        return null;
+    }
+
+    protected function get_file_objects($iteration_method = 'get_file_object') {
+        $upload_dir = $this->get_upload_path();
+        if (!is_dir($upload_dir)) {
+            return array();
+        }
+        return array_values(array_filter(array_map(
+            array($this, $iteration_method),
+            scandir($upload_dir)
+        )));
+    }
+
+    protected function count_file_objects() {
+        return count($this->get_file_objects('is_valid_file_object'));
+    }
+
+    protected function get_error_message($error) {
+        return isset($this->error_messages[$error]) ?
+            $this->error_messages[$error] : $error;
+    }
+
+    public function get_config_bytes($val) {
+        $val = trim($val);
+        $last = strtolower($val[strlen($val)-1]);
+        $val = (int)$val;
+        switch ($last) {
+            case 'g':
+                $val *= 1024;
+            case 'm':
+                $val *= 1024;
+            case 'k':
+                $val *= 1024;
+        }
+        return $this->fix_integer_overflow($val);
+    }
+
+    protected function validate($uploaded_file, $file, $error, $index) {
+        if ($error) {
+            $file->error = $this->get_error_message($error);
+            return false;
+        }
+        $content_length = $this->fix_integer_overflow(
+            (int)$this->get_server_var('CONTENT_LENGTH')
+        );
+        $post_max_size = $this->get_config_bytes(ini_get('post_max_size'));
+        if ($post_max_size && ($content_length > $post_max_size)) {
+            $file->error = $this->get_error_message('post_max_size');
+            return false;
+        }
+        if (!preg_match($this->options['accept_file_types'], $file->name)) {
+            $file->error = $this->get_error_message('accept_file_types');
+            return false;
+        }
+        if ($uploaded_file && is_uploaded_file($uploaded_file)) {
+            $file_size = $this->get_file_size($uploaded_file);
+        } else {
+            $file_size = $content_length;
+        }
+        if ($this->options['max_file_size'] && (
+                $file_size > $this->options['max_file_size'] ||
+                $file->size > $this->options['max_file_size'])
+            ) {
+            $file->error = $this->get_error_message('max_file_size');
+            return false;
+        }
+        if ($this->options['min_file_size'] &&
+            $file_size < $this->options['min_file_size']) {
+            $file->error = $this->get_error_message('min_file_size');
+            return false;
+        }
+        if (is_int($this->options['max_number_of_files']) &&
+                ($this->count_file_objects() >= $this->options['max_number_of_files']) &&
+                // Ignore additional chunks of existing files:
+                !is_file($this->get_upload_path($file->name))) {
+            $file->error = $this->get_error_message('max_number_of_files');
+            return false;
+        }
+        $max_width = @$this->options['max_width'];
+        $max_height = @$this->options['max_height'];
+        $min_width = @$this->options['min_width'];
+        $min_height = @$this->options['min_height'];
+        if (($max_width || $max_height || $min_width || $min_height)
+            && $this->is_valid_image_file($uploaded_file)) {
+            list($img_width, $img_height) = $this->get_image_size($uploaded_file);
+            // If we are auto rotating the image by default, do the checks on
+            // the correct orientation
+            if (
+                @$this->options['image_versions']['']['auto_orient'] &&
+                function_exists('exif_read_data') &&
+                ($exif = @exif_read_data($uploaded_file)) &&
+                (((int) @$exif['Orientation']) >= 5)
+            ) {
+                $tmp = $img_width;
+                $img_width = $img_height;
+                $img_height = $tmp;
+                unset($tmp);
+            }
+        }
+        if (!empty($img_width)) {
+            if ($max_width && $img_width > $max_width) {
+                $file->error = $this->get_error_message('max_width');
+                return false;
+            }
+            if ($max_height && $img_height > $max_height) {
+                $file->error = $this->get_error_message('max_height');
+                return false;
+            }
+            if ($min_width && $img_width < $min_width) {
+                $file->error = $this->get_error_message('min_width');
+                return false;
+            }
+            if ($min_height && $img_height < $min_height) {
+                $file->error = $this->get_error_message('min_height');
+                return false;
+            }
+        }
+        return true;
+    }
+
+    protected function upcount_name_callback($matches) {
+        $index = isset($matches[1]) ? ((int)$matches[1]) + 1 : 1;
+        $ext = isset($matches[2]) ? $matches[2] : '';
+        return ' ('.$index.')'.$ext;
+    }
+
+    protected function upcount_name($name) {
+        return preg_replace_callback(
+            '/(?:(?: \(([\d]+)\))?(\.[^.]+))?$/',
+            array($this, 'upcount_name_callback'),
+            $name,
+            1
+        );
+    }
+
+    protected function get_unique_filename($file_path, $name, $size, $type, $error,
+            $index, $content_range) {
+        while(is_dir($this->get_upload_path($name))) {
+            $name = $this->upcount_name($name);
+        }
+        // Keep an existing filename if this is part of a chunked upload:
+        $uploaded_bytes = $this->fix_integer_overflow((int)$content_range[1]);
+        while (is_file($this->get_upload_path($name))) {
+            if ($uploaded_bytes === $this->get_file_size(
+                    $this->get_upload_path($name))) {
+                break;
+            }
+            $name = $this->upcount_name($name);
+        }
+        return $name;
+    }
+
+    protected function fix_file_extension($file_path, $name, $size, $type, $error,
+            $index, $content_range) {
+        // Add missing file extension for known image types:
+        if (strpos($name, '.') === false &&
+                preg_match('/^image\/(gif|jpe?g|png)/', $type, $matches)) {
+            $name .= '.'.$matches[1];
+        }
+        if ($this->options['correct_image_extensions']) {
+            switch ($this->imagetype($file_path)) {
+                case self::IMAGETYPE_JPEG:
+                    $extensions = array('jpg', 'jpeg');
+                    break;
+                case self::IMAGETYPE_PNG:
+                    $extensions = array('png');
+                    break;
+                case self::IMAGETYPE_GIF:
+                    $extensions = array('gif');
+                    break;
+            }
+            // Adjust incorrect image file extensions:
+            if (!empty($extensions)) {
+                $parts = explode('.', $name);
+                $extIndex = count($parts) - 1;
+                $ext = strtolower(@$parts[$extIndex]);
+                if (!in_array($ext, $extensions)) {
+                    $parts[$extIndex] = $extensions[0];
+                    $name = implode('.', $parts);
+                }
+            }
+        }
+        return $name;
+    }
+
+    protected function trim_file_name($file_path, $name, $size, $type, $error,
+            $index, $content_range) {
+        // Remove path information and dots around the filename, to prevent uploading
+        // into different directories or replacing hidden system files.
+        // Also remove control characters and spaces (\x00..\x20) around the filename:
+        $name = trim($this->basename(stripslashes($name)), ".\x00..\x20");
+        // Replace dots in filenames to avoid security issues with servers
+        // that interpret multiple file extensions, e.g. "example.php.png":
+        $replacement = $this->options['replace_dots_in_filenames'];
+        if (!empty($replacement)) {
+            $parts = explode('.', $name);
+            if (count($parts) > 2) {
+                $ext = array_pop($parts);
+                $name = implode($replacement, $parts).'.'.$ext;
+            }
+        }
+        // Use a timestamp for empty filenames:
+        if (!$name) {
+            $name = str_replace('.', '-', microtime(true));
+        }
+        return $name;
+    }
+
+    protected function get_file_name($file_path, $name, $size, $type, $error,
+            $index, $content_range) {
+        $name = $this->trim_file_name($file_path, $name, $size, $type, $error,
+            $index, $content_range);
+        return $this->get_unique_filename(
+            $file_path,
+            $this->fix_file_extension($file_path, $name, $size, $type, $error,
+                $index, $content_range),
+            $size,
+            $type,
+            $error,
+            $index,
+            $content_range
+        );
+    }
+
+    protected function get_scaled_image_file_paths($file_name, $version) {
+        $file_path = $this->get_upload_path($file_name);
+        if (!empty($version)) {
+            $version_dir = $this->get_upload_path(null, $version);
+            if (!is_dir($version_dir)) {
+                mkdir($version_dir, $this->options['mkdir_mode'], true);
+            }
+            $new_file_path = $version_dir.'/'.$file_name;
+        } else {
+            $new_file_path = $file_path;
+        }
+        return array($file_path, $new_file_path);
+    }
+
+    protected function gd_get_image_object($file_path, $func, $no_cache = false) {
+        if (empty($this->image_objects[$file_path]) || $no_cache) {
+            $this->gd_destroy_image_object($file_path);
+            $this->image_objects[$file_path] = $func($file_path);
+        }
+        return $this->image_objects[$file_path];
+    }
+
+    protected function gd_set_image_object($file_path, $image) {
+        $this->gd_destroy_image_object($file_path);
+        $this->image_objects[$file_path] = $image;
+    }
+
+    protected function gd_destroy_image_object($file_path) {
+        $image = (isset($this->image_objects[$file_path])) ? $this->image_objects[$file_path] : null ;
+        return $image && imagedestroy($image);
+    }
+
+    protected function gd_imageflip($image, $mode) {
+        if (function_exists('imageflip')) {
+            return imageflip($image, $mode);
+        }
+        $new_width = $src_width = imagesx($image);
+        $new_height = $src_height = imagesy($image);
+        $new_img = imagecreatetruecolor($new_width, $new_height);
+        $src_x = 0;
+        $src_y = 0;
+        switch ($mode) {
+            case '1': // flip on the horizontal axis
+                $src_y = $new_height - 1;
+                $src_height = -$new_height;
+                break;
+            case '2': // flip on the vertical axis
+                $src_x  = $new_width - 1;
+                $src_width = -$new_width;
+                break;
+            case '3': // flip on both axes
+                $src_y = $new_height - 1;
+                $src_height = -$new_height;
+                $src_x  = $new_width - 1;
+                $src_width = -$new_width;
+                break;
+            default:
+                return $image;
+        }
+        imagecopyresampled(
+            $new_img,
+            $image,
+            0,
+            0,
+            $src_x,
+            $src_y,
+            $new_width,
+            $new_height,
+            $src_width,
+            $src_height
+        );
+        return $new_img;
+    }
+
+    protected function gd_orient_image($file_path, $src_img) {
+        if (!function_exists('exif_read_data')) {
+            return false;
+        }
+        $exif = @exif_read_data($file_path);
+        if ($exif === false) {
+            return false;
+        }
+        $orientation = (int)@$exif['Orientation'];
+        if ($orientation < 2 || $orientation > 8) {
+            return false;
+        }
+        switch ($orientation) {
+            case 2:
+                $new_img = $this->gd_imageflip(
+                    $src_img,
+                    defined('IMG_FLIP_VERTICAL') ? IMG_FLIP_VERTICAL : 2
+                );
+                break;
+            case 3:
+                $new_img = imagerotate($src_img, 180, 0);
+                break;
+            case 4:
+                $new_img = $this->gd_imageflip(
+                    $src_img,
+                    defined('IMG_FLIP_HORIZONTAL') ? IMG_FLIP_HORIZONTAL : 1
+                );
+                break;
+            case 5:
+                $tmp_img = $this->gd_imageflip(
+                    $src_img,
+                    defined('IMG_FLIP_HORIZONTAL') ? IMG_FLIP_HORIZONTAL : 1
+                );
+                $new_img = imagerotate($tmp_img, 270, 0);
+                imagedestroy($tmp_img);
+                break;
+            case 6:
+                $new_img = imagerotate($src_img, 270, 0);
+                break;
+            case 7:
+                $tmp_img = $this->gd_imageflip(
+                    $src_img,
+                    defined('IMG_FLIP_VERTICAL') ? IMG_FLIP_VERTICAL : 2
+                );
+                $new_img = imagerotate($tmp_img, 270, 0);
+                imagedestroy($tmp_img);
+                break;
+            case 8:
+                $new_img = imagerotate($src_img, 90, 0);
+                break;
+            default:
+                return false;
+        }
+        $this->gd_set_image_object($file_path, $new_img);
+        return true;
+    }
+
+    protected function gd_create_scaled_image($file_name, $version, $options) {
+        if (!function_exists('imagecreatetruecolor')) {
+            error_log('Function not found: imagecreatetruecolor');
+            return false;
+        }
+        list($file_path, $new_file_path) =
+            $this->get_scaled_image_file_paths($file_name, $version);
+        $type = strtolower(substr(strrchr($file_name, '.'), 1));
+        switch ($type) {
+            case 'jpg':
+            case 'jpeg':
+                $src_func = 'imagecreatefromjpeg';
+                $write_func = 'imagejpeg';
+                $image_quality = isset($options['jpeg_quality']) ?
+                    $options['jpeg_quality'] : 75;
+                break;
+            case 'gif':
+                $src_func = 'imagecreatefromgif';
+                $write_func = 'imagegif';
+                $image_quality = null;
+                break;
+            case 'png':
+                $src_func = 'imagecreatefrompng';
+                $write_func = 'imagepng';
+                $image_quality = isset($options['png_quality']) ?
+                    $options['png_quality'] : 9;
+                break;
+            default:
+                return false;
+        }
+        $src_img = $this->gd_get_image_object(
+            $file_path,
+            $src_func,
+            !empty($options['no_cache'])
+        );
+        $image_oriented = false;
+        if (!empty($options['auto_orient']) && $this->gd_orient_image(
+                $file_path,
+                $src_img
+            )) {
+            $image_oriented = true;
+            $src_img = $this->gd_get_image_object(
+                $file_path,
+                $src_func
+            );
+        }
+        $max_width = $img_width = imagesx($src_img);
+        $max_height = $img_height = imagesy($src_img);
+        if (!empty($options['max_width'])) {
+            $max_width = $options['max_width'];
+        }
+        if (!empty($options['max_height'])) {
+            $max_height = $options['max_height'];
+        }
+        $scale = min(
+            $max_width / $img_width,
+            $max_height / $img_height
+        );
+        if ($scale >= 1) {
+            if ($image_oriented) {
+                return $write_func($src_img, $new_file_path, $image_quality);
+            }
+            if ($file_path !== $new_file_path) {
+                return copy($file_path, $new_file_path);
+            }
+            return true;
+        }
+        if (empty($options['crop'])) {
+            $new_width = $img_width * $scale;
+            $new_height = $img_height * $scale;
+            $dst_x = 0;
+            $dst_y = 0;
+            $new_img = imagecreatetruecolor($new_width, $new_height);
+        } else {
+            if (($img_width / $img_height) >= ($max_width / $max_height)) {
+                $new_width = $img_width / ($img_height / $max_height);
+                $new_height = $max_height;
+            } else {
+                $new_width = $max_width;
+                $new_height = $img_height / ($img_width / $max_width);
+            }
+            $dst_x = 0 - ($new_width - $max_width) / 2;
+            $dst_y = 0 - ($new_height - $max_height) / 2;
+            $new_img = imagecreatetruecolor($max_width, $max_height);
+        }
+        // Handle transparency in GIF and PNG images:
+        switch ($type) {
+            case 'gif':
+            case 'png':
+                imagecolortransparent($new_img, imagecolorallocate($new_img, 0, 0, 0));
+            case 'png':
+                imagealphablending($new_img, false);
+                imagesavealpha($new_img, true);
+                break;
+        }
+        $success = imagecopyresampled(
+            $new_img,
+            $src_img,
+            $dst_x,
+            $dst_y,
+            0,
+            0,
+            $new_width,
+            $new_height,
+            $img_width,
+            $img_height
+        ) && $write_func($new_img, $new_file_path, $image_quality);
+        $this->gd_set_image_object($file_path, $new_img);
+        return $success;
+    }
+
+    protected function imagick_get_image_object($file_path, $no_cache = false) {
+        if (empty($this->image_objects[$file_path]) || $no_cache) {
+            $this->imagick_destroy_image_object($file_path);
+            $image = new \Imagick();
+            if (!empty($this->options['imagick_resource_limits'])) {
+                foreach ($this->options['imagick_resource_limits'] as $type => $limit) {
+                    $image->setResourceLimit($type, $limit);
+                }
+            }
+            $image->readImage($file_path);
+            $this->image_objects[$file_path] = $image;
+        }
+        return $this->image_objects[$file_path];
+    }
+
+    protected function imagick_set_image_object($file_path, $image) {
+        $this->imagick_destroy_image_object($file_path);
+        $this->image_objects[$file_path] = $image;
+    }
+
+    protected function imagick_destroy_image_object($file_path) {
+        $image = (isset($this->image_objects[$file_path])) ? $this->image_objects[$file_path] : null ;
+        return $image && $image->destroy();
+    }
+
+    protected function imagick_orient_image($image) {
+        $orientation = $image->getImageOrientation();
+        $background = new \ImagickPixel('none');
+        switch ($orientation) {
+            case \imagick::ORIENTATION_TOPRIGHT: // 2
+                $image->flopImage(); // horizontal flop around y-axis
+                break;
+            case \imagick::ORIENTATION_BOTTOMRIGHT: // 3
+                $image->rotateImage($background, 180);
+                break;
+            case \imagick::ORIENTATION_BOTTOMLEFT: // 4
+                $image->flipImage(); // vertical flip around x-axis
+                break;
+            case \imagick::ORIENTATION_LEFTTOP: // 5
+                $image->flopImage(); // horizontal flop around y-axis
+                $image->rotateImage($background, 270);
+                break;
+            case \imagick::ORIENTATION_RIGHTTOP: // 6
+                $image->rotateImage($background, 90);
+                break;
+            case \imagick::ORIENTATION_RIGHTBOTTOM: // 7
+                $image->flipImage(); // vertical flip around x-axis
+                $image->rotateImage($background, 270);
+                break;
+            case \imagick::ORIENTATION_LEFTBOTTOM: // 8
+                $image->rotateImage($background, 270);
+                break;
+            default:
+                return false;
+        }
+        $image->setImageOrientation(\imagick::ORIENTATION_TOPLEFT); // 1
+        return true;
+    }
+
+    protected function imagick_create_scaled_image($file_name, $version, $options) {
+        list($file_path, $new_file_path) =
+            $this->get_scaled_image_file_paths($file_name, $version);
+        $image = $this->imagick_get_image_object(
+            $file_path,
+            !empty($options['crop']) || !empty($options['no_cache'])
+        );
+        if ($image->getImageFormat() === 'GIF') {
+            // Handle animated GIFs:
+            $images = $image->coalesceImages();
+            foreach ($images as $frame) {
+                $image = $frame;
+                $this->imagick_set_image_object($file_name, $image);
+                break;
+            }
+        }
+        $image_oriented = false;
+        if (!empty($options['auto_orient'])) {
+            $image_oriented = $this->imagick_orient_image($image);
+        } 
+	    
+        $image_resize = false; 
+        $new_width = $max_width = $img_width = $image->getImageWidth();
+        $new_height = $max_height = $img_height = $image->getImageHeight(); 
+		  
+        // use isset(). User might be setting max_width = 0 (auto in regular resizing). Value 0 would be considered empty when you use empty()
+        if (isset($options['max_width'])) {
+            $image_resize = true; 
+            $new_width = $max_width = $options['max_width']; 
+        }
+        if (isset($options['max_height'])) {
+            $image_resize = true;
+            $new_height = $max_height = $options['max_height'];
+        }
+        
+        $image_strip = (isset($options['strip']) ? $options['strip'] : false);
+ 
+        if ( !$image_oriented && ($max_width >= $img_width) && ($max_height >= $img_height) && !$image_strip && empty($options["jpeg_quality"]) ) {        
+            if ($file_path !== $new_file_path) {
+                return copy($file_path, $new_file_path);
+            }
+            return true;
+        }
+        $crop = (isset($options['crop']) ? $options['crop'] : false);
+        
+        if ($crop) {
+            $x = 0;
+            $y = 0;
+            if (($img_width / $img_height) >= ($max_width / $max_height)) {
+                $new_width = 0; // Enables proportional scaling based on max_height
+                $x = ($img_width / ($img_height / $max_height) - $max_width) / 2;
+            } else {
+                $new_height = 0; // Enables proportional scaling based on max_width
+                $y = ($img_height / ($img_width / $max_width) - $max_height) / 2;
+            }
+        }
+        $success = $image->resizeImage(
+            $new_width,
+            $new_height,
+            isset($options['filter']) ? $options['filter'] : \imagick::FILTER_LANCZOS,
+            isset($options['blur']) ? $options['blur'] : 1,
+            $new_width && $new_height // fit image into constraints if not to be cropped
+        );
+        if ($success && $crop) {
+            $success = $image->cropImage(
+                $max_width,
+                $max_height,
+                $x,
+                $y
+            );
+            if ($success) {
+                $success = $image->setImagePage($max_width, $max_height, 0, 0);
+            }
+        }
+        $type = strtolower(substr(strrchr($file_name, '.'), 1));
+        switch ($type) {
+            case 'jpg':
+            case 'jpeg':
+                if (!empty($options['jpeg_quality'])) {
+                    $image->setImageCompression(\imagick::COMPRESSION_JPEG);
+                    $image->setImageCompressionQuality($options['jpeg_quality']);
+                }
+                break;
+        }
+        if ( $image_strip ) {
+            $image->stripImage();
+        }
+        return $success && $image->writeImage($new_file_path);
+    }
+
+    protected function imagemagick_create_scaled_image($file_name, $version, $options) {
+        list($file_path, $new_file_path) =
+            $this->get_scaled_image_file_paths($file_name, $version);
+        $resize = @$options['max_width']
+            .(empty($options['max_height']) ? '' : 'X'.$options['max_height']);
+        if (!$resize && empty($options['auto_orient'])) {
+            if ($file_path !== $new_file_path) {
+                return copy($file_path, $new_file_path);
+            }
+            return true;
+        }
+        $cmd = $this->options['convert_bin'];
+        if (!empty($this->options['convert_params'])) {
+            $cmd .= ' '.$this->options['convert_params'];
+        }
+        $cmd .= ' '.escapeshellarg($file_path);
+        if (!empty($options['auto_orient'])) {
+            $cmd .= ' -auto-orient';
+        }
+        if ($resize) {
+            // Handle animated GIFs:
+            $cmd .= ' -coalesce';
+            if (empty($options['crop'])) {
+                $cmd .= ' -resize '.escapeshellarg($resize.'>');
+            } else {
+                $cmd .= ' -resize '.escapeshellarg($resize.'^');
+                $cmd .= ' -gravity center';
+                $cmd .= ' -crop '.escapeshellarg($resize.'+0+0');
+            }
+            // Make sure the page dimensions are correct (fixes offsets of animated GIFs):
+            $cmd .= ' +repage';
+        }
+        if (!empty($options['convert_params'])) {
+            $cmd .= ' '.$options['convert_params'];
+        }
+        $cmd .= ' '.escapeshellarg($new_file_path);
+        exec($cmd, $output, $error);
+        if ($error) {
+            error_log(implode('\n', $output));
+            return false;
+        }
+        return true;
+    }
+
+    protected function get_image_size($file_path) {
+        if ($this->options['image_library']) {
+            if (extension_loaded('imagick')) {
+                $image = new \Imagick();
+                try {
+                    if (@$image->pingImage($file_path)) {
+                        $dimensions = array($image->getImageWidth(), $image->getImageHeight());
+                        $image->destroy();
+                        return $dimensions;
+                    }
+                    return false;
+                } catch (\Exception $e) {
+                    error_log($e->getMessage());
+                }
+            }
+            if ($this->options['image_library'] === 2) {
+                $cmd = $this->options['identify_bin'];
+                $cmd .= ' -ping '.escapeshellarg($file_path);
+                exec($cmd, $output, $error);
+                if (!$error && !empty($output)) {
+                    // image.jpg JPEG 1920x1080 1920x1080+0+0 8-bit sRGB 465KB 0.000u 0:00.000
+                    $infos = preg_split('/\s+/', substr($output[0], strlen($file_path)));
+                    $dimensions = preg_split('/x/', $infos[2]);
+                    return $dimensions;
+                }
+                return false;
+            }
+        }
+        if (!function_exists('getimagesize')) {
+            error_log('Function not found: getimagesize');
+            return false;
+        }
+        return @getimagesize($file_path);
+    }
+
+    protected function create_scaled_image($file_name, $version, $options) {
+        if ($this->options['image_library'] === 2) {
+            return $this->imagemagick_create_scaled_image($file_name, $version, $options);
+        }
+        if ($this->options['image_library'] && extension_loaded('imagick')) {
+            return $this->imagick_create_scaled_image($file_name, $version, $options);
+        }
+        return $this->gd_create_scaled_image($file_name, $version, $options);
+    }
+
+    protected function destroy_image_object($file_path) {
+        if ($this->options['image_library'] && extension_loaded('imagick')) {
+            return $this->imagick_destroy_image_object($file_path);
+        }
+    }
+
+    protected function imagetype($file_path) {
+        $fp = fopen($file_path, 'r');
+        $data = fread($fp, 4);
+        fclose($fp);
+        // GIF: 47 49 46
+        if (substr($data, 0, 3) === 'GIF') {
+            return self::IMAGETYPE_GIF;
+        }
+        // JPG: FF D8
+        if (bin2hex(substr($data, 0, 2)) === 'ffd8') {
+            return self::IMAGETYPE_JPEG;
+        }
+        // PNG: 89 50 4E 47
+        if (bin2hex(@$data[0]).substr($data, 1, 4) === '89PNG') {
+            return self::IMAGETYPE_PNG;
+        }
+        return false;
+    }
+
+    protected function is_valid_image_file($file_path) {
+        return !!$this->imagetype($file_path);
+    }
+
+    protected function handle_image_file($file_path, $file) {
+        $failed_versions = array();
+        foreach ($this->options['image_versions'] as $version => $options) {
+            if ($this->create_scaled_image($file->name, $version, $options)) {
+                if (!empty($version)) {
+                    $file->{$version.'Url'} = $this->get_download_url(
+                        $file->name,
+                        $version
+                    );
+                } else {
+                    $file->size = $this->get_file_size($file_path, true);
+                }
+            } else {
+                $failed_versions[] = $version ? $version : 'original';
+            }
+        }
+        if (count($failed_versions)) {
+            $file->error = $this->get_error_message('image_resize')
+                    .' ('.implode($failed_versions, ', ').')';
+        }
+        // Free memory:
+        $this->destroy_image_object($file_path);
+    }
+
+    protected function handle_file_upload($uploaded_file, $name, $size, $type, $error,
+            $index = null, $content_range = null) {
+        $file = new \stdClass();
+        $file->name = $this->get_file_name($uploaded_file, $name, $size, $type, $error,
+            $index, $content_range);
+        $file->size = $this->fix_integer_overflow((int)$size);
+        $file->type = $type;
+        if ($this->validate($uploaded_file, $file, $error, $index)) {
+            $this->handle_form_data($file, $index);
+            $upload_dir = $this->get_upload_path();
+            if (!is_dir($upload_dir)) {
+                mkdir($upload_dir, $this->options['mkdir_mode'], true);
+            }
+            $file_path = $this->get_upload_path($file->name);
+            $append_file = $content_range && is_file($file_path) &&
+                $file->size > $this->get_file_size($file_path);
+            if ($uploaded_file && is_uploaded_file($uploaded_file)) {
+                // multipart/formdata uploads (POST method uploads)
+                if ($append_file) {
+                    file_put_contents(
+                        $file_path,
+                        fopen($uploaded_file, 'r'),
+                        FILE_APPEND
+                    );
+                } else {
+                    move_uploaded_file($uploaded_file, $file_path);
+                }
+            } else {
+                // Non-multipart uploads (PUT method support)
+                file_put_contents(
+                    $file_path,
+                    fopen($this->options['input_stream'], 'r'),
+                    $append_file ? FILE_APPEND : 0
+                );
+            }
+            $file_size = $this->get_file_size($file_path, $append_file);
+            if ($file_size === $file->size) {
+                $file->url = $this->get_download_url($file->name);
+                if ($this->is_valid_image_file($file_path)) {
+                    $this->handle_image_file($file_path, $file);
+                }
+            } else {
+                $file->size = $file_size;
+                if (!$content_range && $this->options['discard_aborted_uploads']) {
+                    unlink($file_path);
+                    $file->error = $this->get_error_message('abort');
+                }
+            }
+            $this->set_additional_file_properties($file);
+        }
+        return $file;
+    }
+
+    protected function readfile($file_path) {
+        $file_size = $this->get_file_size($file_path);
+        $chunk_size = $this->options['readfile_chunk_size'];
+        if ($chunk_size && $file_size > $chunk_size) {
+            $handle = fopen($file_path, 'rb');
+            while (!feof($handle)) {
+                echo fread($handle, $chunk_size);
+                @ob_flush();
+                @flush();
+            }
+            fclose($handle);
+            return $file_size;
+        }
+        return readfile($file_path);
+    }
+
+    protected function body($str) {
+        echo $str;
+    }
+
+    protected function header($str) {
+        header($str);
+    }
+
+    protected function get_upload_data($id) {
+        return @$_FILES[$id];
+    }
+
+    protected function get_post_param($id) {
+        return @$_POST[$id];
+    }
+
+    protected function get_query_param($id) {
+        return @$_GET[$id];
+    }
+
+    protected function get_server_var($id) {
+        return @$_SERVER[$id];
+    }
+
+    protected function handle_form_data($file, $index) {
+        // Handle form data, e.g. $_POST['description'][$index]
+    }
+
+    protected function get_version_param() {
+        return $this->basename(stripslashes($this->get_query_param('version')));
+    }
+
+    protected function get_singular_param_name() {
+        return substr($this->options['param_name'], 0, -1);
+    }
+
+    protected function get_file_name_param() {
+        $name = $this->get_singular_param_name();
+        return $this->basename(stripslashes($this->get_query_param($name)));
+    }
+
+    protected function get_file_names_params() {
+        $params = $this->get_query_param($this->options['param_name']);
+        if (!$params) {
+            return null;
+        }
+        foreach ($params as $key => $value) {
+            $params[$key] = $this->basename(stripslashes($value));
+        }
+        return $params;
+    }
+
+    protected function get_file_type($file_path) {
+        switch (strtolower(pathinfo($file_path, PATHINFO_EXTENSION))) {
+            case 'jpeg':
+            case 'jpg':
+                return 'image/jpeg';
+            case 'png':
+                return 'image/png';
+            case 'gif':
+                return 'image/gif';
+            default:
+                return '';
+        }
+    }
+
+    protected function download() {
+        switch ($this->options['download_via_php']) {
+            case 1:
+                $redirect_header = null;
+                break;
+            case 2:
+                $redirect_header = 'X-Sendfile';
+                break;
+            case 3:
+                $redirect_header = 'X-Accel-Redirect';
+                break;
+            default:
+                return $this->header('HTTP/1.1 403 Forbidden');
+        }
+        $file_name = $this->get_file_name_param();
+        if (!$this->is_valid_file_object($file_name)) {
+            return $this->header('HTTP/1.1 404 Not Found');
+        }
+        if ($redirect_header) {
+            return $this->header(
+                $redirect_header.': '.$this->get_download_url(
+                    $file_name,
+                    $this->get_version_param(),
+                    true
+                )
+            );
+        }
+        $file_path = $this->get_upload_path($file_name, $this->get_version_param());
+        // Prevent browsers from MIME-sniffing the content-type:
+        $this->header('X-Content-Type-Options: nosniff');
+        if (!preg_match($this->options['inline_file_types'], $file_name)) {
+            $this->header('Content-Type: application/octet-stream');
+            $this->header('Content-Disposition: attachment; filename="'.$file_name.'"');
+        } else {
+            $this->header('Content-Type: '.$this->get_file_type($file_path));
+            $this->header('Content-Disposition: inline; filename="'.$file_name.'"');
+        }
+        $this->header('Content-Length: '.$this->get_file_size($file_path));
+        $this->header('Last-Modified: '.gmdate('D, d M Y H:i:s T', filemtime($file_path)));
+        $this->readfile($file_path);
+    }
+
+    protected function send_content_type_header() {
+        $this->header('Vary: Accept');
+        if (strpos($this->get_server_var('HTTP_ACCEPT'), 'application/json') !== false) {
+            $this->header('Content-type: application/json');
+        } else {
+            $this->header('Content-type: text/plain');
+        }
+    }
+
+    protected function send_access_control_headers() {
+        $this->header('Access-Control-Allow-Origin: '.$this->options['access_control_allow_origin']);
+        $this->header('Access-Control-Allow-Credentials: '
+            .($this->options['access_control_allow_credentials'] ? 'true' : 'false'));
+        $this->header('Access-Control-Allow-Methods: '
+            .implode(', ', $this->options['access_control_allow_methods']));
+        $this->header('Access-Control-Allow-Headers: '
+            .implode(', ', $this->options['access_control_allow_headers']));
+    }
+
+    public function generate_response($content, $print_response = true) {
+        $this->response = $content;
+        if ($print_response) {
+            $json = json_encode($content);
+            $redirect = stripslashes($this->get_post_param('redirect'));
+            if ($redirect && preg_match($this->options['redirect_allow_target'], $redirect)) {
+                $this->header('Location: '.sprintf($redirect, rawurlencode($json)));
+                return;
+            }
+            $this->head();
+            if ($this->get_server_var('HTTP_CONTENT_RANGE')) {
+                $files = isset($content[$this->options['param_name']]) ?
+                    $content[$this->options['param_name']] : null;
+                if ($files && is_array($files) && is_object($files[0]) && $files[0]->size) {
+                    $this->header('Range: 0-'.(
+                        $this->fix_integer_overflow((int)$files[0]->size) - 1
+                    ));
+                }
+            }
+            $this->body($json);
+        }
+        return $content;
+    }
+
+    public function get_response () {
+        return $this->response;
+    }
+
+    public function head() {
+        $this->header('Pragma: no-cache');
+        $this->header('Cache-Control: no-store, no-cache, must-revalidate');
+        $this->header('Content-Disposition: inline; filename="files.json"');
+        // Prevent Internet Explorer from MIME-sniffing the content-type:
+        $this->header('X-Content-Type-Options: nosniff');
+        if ($this->options['access_control_allow_origin']) {
+            $this->send_access_control_headers();
+        }
+        $this->send_content_type_header();
+    }
+
+    public function get($print_response = true) {
+        if ($print_response && $this->get_query_param('download')) {
+            return $this->download();
+        }
+        $file_name = $this->get_file_name_param();
+        if ($file_name) {
+            $response = array(
+                $this->get_singular_param_name() => $this->get_file_object($file_name)
+            );
+        } else {
+            $response = array(
+                $this->options['param_name'] => $this->get_file_objects()
+            );
+        }
+        return $this->generate_response($response, $print_response);
+    }
+
+    public function post($print_response = true) {
+        if ($this->get_query_param('_method') === 'DELETE') {
+            return $this->delete($print_response);
+        }
+        $upload = $this->get_upload_data($this->options['param_name']);
+        // Parse the Content-Disposition header, if available:
+        $content_disposition_header = $this->get_server_var('HTTP_CONTENT_DISPOSITION');
+        $file_name = $content_disposition_header ?
+            rawurldecode(preg_replace(
+                '/(^[^"]+")|("$)/',
+                '',
+                $content_disposition_header
+            )) : null;
+        // Parse the Content-Range header, which has the following form:
+        // Content-Range: bytes 0-524287/2000000
+        $content_range_header = $this->get_server_var('HTTP_CONTENT_RANGE');
+        $content_range = $content_range_header ?
+            preg_split('/[^0-9]+/', $content_range_header) : null;
+        $size =  $content_range ? $content_range[3] : null;
+        $files = array();
+        if ($upload) {
+            if (is_array($upload['tmp_name'])) {
+                // param_name is an array identifier like "files[]",
+                // $upload is a multi-dimensional array:
+                foreach ($upload['tmp_name'] as $index => $value) {
+                    $files[] = $this->handle_file_upload(
+                        $upload['tmp_name'][$index],
+                        $file_name ? $file_name : $upload['name'][$index],
+                        $size ? $size : $upload['size'][$index],
+                        $upload['type'][$index],
+                        $upload['error'][$index],
+                        $index,
+                        $content_range
+                    );
+                }
+            } else {
+                // param_name is a single object identifier like "file",
+                // $upload is a one-dimensional array:
+                $files[] = $this->handle_file_upload(
+                    isset($upload['tmp_name']) ? $upload['tmp_name'] : null,
+                    $file_name ? $file_name : (isset($upload['name']) ?
+                            $upload['name'] : null),
+                    $size ? $size : (isset($upload['size']) ?
+                            $upload['size'] : $this->get_server_var('CONTENT_LENGTH')),
+                    isset($upload['type']) ?
+                            $upload['type'] : $this->get_server_var('CONTENT_TYPE'),
+                    isset($upload['error']) ? $upload['error'] : null,
+                    null,
+                    $content_range
+                );
+            }
+        }
+        $response = array($this->options['param_name'] => $files);
+        return $this->generate_response($response, $print_response);
+    }
+
+    public function delete($print_response = true) {
+        $file_names = $this->get_file_names_params();
+        if (empty($file_names)) {
+            $file_names = array($this->get_file_name_param());
+        }
+        $response = array();
+        foreach ($file_names as $file_name) {
+            $file_path = $this->get_upload_path($file_name);
+            $success = is_file($file_path) && $file_name[0] !== '.' && unlink($file_path);
+            if ($success) {
+                foreach ($this->options['image_versions'] as $version => $options) {
+                    if (!empty($version)) {
+                        $file = $this->get_upload_path($file_name, $version);
+                        if (is_file($file)) {
+                            unlink($file);
+                        }
+                    }
+                }
+            }
+            $response[$file_name] = $success;
+        }
+        return $this->generate_response($response, $print_response);
+    }
+
+    protected function basename($filepath, $suffix = null) {
+        $splited = preg_split('/\//', rtrim ($filepath, '/ '));
+        return substr(basename('X'.$splited[count($splited)-1], $suffix), 1);
+    }
+}
diff --git a/vendor/blueimp/jquery-file-upload/server/php/docker-compose.yml b/vendor/blueimp/jquery-file-upload/server/php/docker-compose.yml
new file mode 100644
index 000000000..74eabf7dc
--- /dev/null
+++ b/vendor/blueimp/jquery-file-upload/server/php/docker-compose.yml
@@ -0,0 +1,9 @@
+version: '2.3'
+services:
+  apache:
+    build: ./
+    network_mode: bridge
+    ports:
+      - "80:80"
+    volumes:
+      - "../../:/var/www/html"
diff --git a/vendor/blueimp/jquery-file-upload/server/php/files/.gitignore b/vendor/blueimp/jquery-file-upload/server/php/files/.gitignore
new file mode 100644
index 000000000..e24a60fae
--- /dev/null
+++ b/vendor/blueimp/jquery-file-upload/server/php/files/.gitignore
@@ -0,0 +1,3 @@
+*
+!.gitignore
+!.htaccess
diff --git a/vendor/blueimp/jquery-file-upload/server/php/files/.htaccess b/vendor/blueimp/jquery-file-upload/server/php/files/.htaccess
new file mode 100644
index 000000000..6f454afb9
--- /dev/null
+++ b/vendor/blueimp/jquery-file-upload/server/php/files/.htaccess
@@ -0,0 +1,26 @@
+# To enable the Headers module, execute the following command and reload Apache:
+# sudo a2enmod headers
+
+# The following directives prevent the execution of script files
+# in the context of the website.
+# They also force the content-type application/octet-stream and
+# force browsers to display a download dialog for non-image files.
+SetHandler default-handler
+ForceType application/octet-stream
+Header set Content-Disposition attachment
+
+# The following unsets the forced type and Content-Disposition headers
+# for known image files:
+<FilesMatch "(?i)\.(gif|jpe?g|png)$">
+	ForceType none
+	Header unset Content-Disposition
+</FilesMatch>
+
+# The following directive prevents browsers from MIME-sniffing the content-type.
+# This is an important complement to the ForceType directive above:
+Header set X-Content-Type-Options nosniff
+
+# Uncomment the following lines to prevent unauthorized download of files:
+#AuthName "Authorization required"
+#AuthType Basic
+#require valid-user
diff --git a/vendor/blueimp/jquery-file-upload/server/php/index.php b/vendor/blueimp/jquery-file-upload/server/php/index.php
new file mode 100644
index 000000000..9c2cfb8eb
--- /dev/null
+++ b/vendor/blueimp/jquery-file-upload/server/php/index.php
@@ -0,0 +1,15 @@
+<?php
+/*
+ * jQuery File Upload Plugin PHP Example
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2010, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+exit;
+error_reporting(E_ALL | E_STRICT);
+require('UploadHandler.php');
+$upload_handler = new UploadHandler();