UIImagePNGRepresentation导致HTTP错误403

我今天有一个很特别的问题。我在iOS中创建了一个多部分/表单数据头,然后将其发送到web服务器上的PHP脚本。它只使用字符串作为数据,但当我尝试将图像附加到标头时,它返回403。以下是尝试连接的函数:

func uploadImage(image: UIImage) {
    var url: NSURL = NSURL(string: "https://example.com/uploadPicture.php")!
    var request: NSMutableURLRequest = NSMutableURLRequest(URL: url)

    request.HTTPMethod = "POST"

    var boundary = NSString(format: "dsfghjkergsalkj")
    var contentType = NSString(format: "multipart/form-data; boundary=%@", boundary)
    request.addValue(contentType, forHTTPHeaderField: "Content-Type")
    request.timeoutInterval = 60

    var body = NSMutableData()

    body.appendData(NSString(format: "--%@\r\n", boundary).dataUsingEncoding(NSUTF8StringEncoding)!)
    body.appendData(NSString(format: "Content-Disposition: form-data; name=\"image-name\"\r\n\r\n").dataUsingEncoding(NSUTF8StringEncoding)!)
    body.appendData("yay".dataUsingEncoding(NSUTF8StringEncoding)!)

    body.appendData(NSString(format: "--%@\r\n", boundary).dataUsingEncoding(NSUTF8StringEncoding)!)
    body.appendData(NSString(format: "Content-Type: image/png\r\n").dataUsingEncoding(NSUTF8StringEncoding)!)
    body.appendData(NSString(format: "Content-Transfer-Encoding: binary\r\n").dataUsingEncoding(NSUTF8StringEncoding)!)
    body.appendData(NSString(format: "Content-Disposition: form-data; name=\"profile-img\"; filename=\"profile.png\"\r\n\r\n").dataUsingEncoding(NSUTF8StringEncoding)!)
    body.appendData(NSData(data: UIImagePNGRepresentation(image)))

    //println(NSData(data: UIImagePNGRepresentation(image)))

    body.appendData(NSString(format: "--%@\r\n", boundary).dataUsingEncoding(NSUTF8StringEncoding)!)

    request.HTTPBody = body

    let task = NSURLSession(configuration: .defaultSessionConfiguration(), delegate: nil, delegateQueue: NSOperationQueue.mainQueue()).dataTaskWithRequest(request) {
        data, response, error in

        if (error != nil) {
            println("Error Submitting Request: \(error)")
            return
        }

        var err: NSError?
        var userData: [String: String]!
        userData = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: &err) as? [String: String]

        if(userData != nil) {
            println(data)
            println(userData)
        } else {
            println(data)
            println("No data recieved.")
        }
    }

    task.resume()

}

它应该返回一个JSON关联数组,该数组在键“data”下具有“true”或“false”,如下所示。

if(isset($_FILES['profile-img'])) {
    $arr = ['data': 'true'];
} else {
    $arr = ['data': 'false'];
}

echo json_encode($arr);

相反,它返回一个十六进制字节的长列表,这是403禁止的页面。

发表评论 body.appendData(NSData(data: UIImagePNGRepresentation(image))) 允许连接工作。

这可能是什么原因造成的?我想什么都试过了。

编辑:这里是完整的PHP页面,不多。

<?php

error_reporting(E_ALL);
ini_set('display errors', 1);

if(isset($_FILES['profile-img'])) {
    $arr = ['data': 'true'];
} else {
    $arr = ['data': 'false'];
}

echo json_encode($arr);

/*$uploaddir = './uploads/';
$file = basename($_FILES['profile_img']['name']);
$uploadfile = $uploaddir . $file;

if (move_uploaded_file($_FILES['profile_img']['tmp_name'], $uploadfile)) {
    $arr = ['data': 'true'];
} else {
    $arr = ['data': 'false'];
}

echo json_encode($arr);*/

?>