send image server, not sending, because?

Question

gdScript-->

extends Node2D

# class member variables go here, for example:
# var a = 2
# var b = "textvar"


var headers=[];
func _ready():
    # Called every time the node is added to the scene.
    # Initialization here

    var http=HTTPClient.new()
    var r=PoolByteArray();

    http.connect_to_host("http://localhost",80)
    var file = File.new()
    file.open("img/t.png", File.READ)

    var content = file.get_buffer(file.get_len());

    file.close()
    r.append_array(content)



    headers.append("Content-Length: "+String(r.size()));
    headers.append("Content-Disposition: form-data; name=fileToUpload; filename=t.png");
    headers.append("Content-Type: multipart/form-data,  boundary=----WebKitFormBoundaryePkpFF7tjBAqx29L");



    while( http.get_status()==HTTPClient.STATUS_CONNECTING or http.get_status()==HTTPClient.STATUS_RESOLVING):
        http.poll()
        OS.delay_msec(500)
    var result = http.request_raw(HTTPClient.METHOD_POST, "/teste/teste.php", headers, r)


    while (http.get_status() == HTTPClient.STATUS_REQUESTING):
        http.poll()
        OS.delay_msec(500)

    if http.get_status() != HTTPClient.STATUS_BODY and http.get_status() != HTTPClient.STATUS_CONNECTED:
        return

    if !http.has_response():
       return

    var rb=PoolByteArray()

    while(http.get_status()==HTTPClient.STATUS_BODY):
        http.poll()
        var chunk = http.read_response_body_chunk() # Get a chunk

php -->

<?php
$target_dir = "uploads/";
echo $_FILES["fileToUpload"]["name"];
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);

$uploadOk = 1;
$imageFileType = strtolower(pathinfo($target_file,PATHINFO_EXTENSION));
// Check if image file is a actual image or fake image
if(isset($_POST["submit"])) {
    $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
    if($check !== false) {
        echo "File is an image - " . $check["mime"] . ".";
        $uploadOk = 1;
    } else {
        echo "File is not an image.";
        $uploadOk = 0;
    }
}
// Check if file already exists
if (file_exists($target_file)) {
    echo "Sorry, file already exists.";
    $uploadOk = 0;
}
// Check file size
if ($_FILES["fileToUpload"]["size"] > 500000) {
    echo "Sorry, your file is too large.";
    $uploadOk = 0;
}
// Allow certain file formats
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
    echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
    $uploadOk = 0;
}
// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
    echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {
    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
        echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
    } else {
        echo "Sorry, there was an error uploading your file.";
    }
}
?>