我正在尝试在 Swift 中构建一个简单的文件上传 iOS 应用程序，但在单击“上传图像”按钮后，控制台中不断出现以下内部服务器错误:
********* response = <NSHTTPURLResponse: 0x7f95284b65c0> { URL: http://website.com/upload.php } { status code: 500, headers {
Age = 0;
"Cache-Control" = "max-age=0";
Connection = "keep-alive";
"Content-Length" = 655;
"Content-Type" = "text/html; charset=iso-8859-1";
Date = "Thu, 30 Jul 2015 04:58:50 GMT";
Expires = "Thu, 30 Jul 2015 04:58:50 GMT";
"X-Cache" = MISS;
"X-Varnish" = 107809910;
} }
********* response data = <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>500 Internal Server Error</title>
</head><body>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error or
misconfiguration and was unable to complete
your request.</p>
<p>Please contact the server administrator at
no-reply@x10hosting.com to inform them of the time this error occurred,
and the actions you performed just before this error.</p>
<p>More information about this error may be available
in the server error log.</p>
<p>Additionally, a 404 Not Found
error was encountered while trying to use an ErrorDocument to handle the request.</p>
</body></html>
这是我的 Swift View Controller 代码:
import UIKit
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
@IBOutlet weak var myImageView: UIImageView!
@IBOutlet weak var myActivityIndicator: UIActivityIndicatorView!
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
@IBAction func selectPhotoPressed() {
var myPickerControl = UIImagePickerController()
myPickerControl.delegate = self
myPickerControl.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
self.presentViewController(myPickerControl, animated: true, completion: nil)
}
@IBAction func uploadImagePressed() {
myImageUploadRequest()
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {
myImageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage
self.dismissViewControllerAnimated(true, completion: nil)
}
func myImageUploadRequest()
{
let myURL = NSURL(string: "http://website.com/upload.php");
let request = NSMutableURLRequest(URL: myURL)
request.HTTPMethod = "POST"
let param = [
"firstName": "John",
"lastName": "Smith",
"userID": "1"
]
let boundary = generateBoundaryString()
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
let imageData = UIImageJPEGRepresentation(myImageView.image, 1)
if (imageData == nil) { return; }
request.HTTPBody = createBodyWithParameters(param, filePathKey: "file", imageDataKey: imageData, boundary: boundary)
myActivityIndicator.startAnimating();
let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
data, response, error in
if error != nil {
println("error=\(error)")
return
}
// print out response object
println("********* response = \(response)")
// print out response bdoy
let responseString = NSString(data: data, encoding: NSUTF8StringEncoding)
println("********* response data = \(responseString)")
dispatch_async(dispatch_get_main_queue(), {
self.myActivityIndicator.stopAnimating()
self.myImageView.image = nil
});
}
task.resume()
}
func createBodyWithParameters(parameters: [String: String]?, filePathKey: String?, imageDataKey: NSData, boundary: String) -> NSData {
var body = NSMutableData();
if parameters != nil {
for (key, value) in parameters! {
body.appendString("-\(boundary)\r\n")
body.appendString("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n")
body.appendString("\(value)\r\n")
}
}
let filename = "user-profile.jpg"
let mimetype = "image/jpg"
body.appendString("--\(boundary)\r\n")
body.appendString("Content-Disposition: form-data; name=\"\(filePathKey!)\"; filename=\"\(filename)\"\r\n")
body.appendString("Content-Type: \(mimetype)\r\n\r\n")
body.appendData(imageDataKey)
body.appendString("\r\n")
body.appendString("--\(boundary)--\r\n")
return body
}
func generateBoundaryString() -> String {
return "Boundary-\(NSUUID().UUIDString)"
}
}
extension NSMutableData {
func appendString(string: String) {
let data = string.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)
appendData(data!)
}
}
后台upload.php文件如下:
<?php
$firstName = $_REQUEST["firstName"];
$lastName = $_REQUEST["lastName"];
$userID = $_REQUEST["userID"];
$target_dir = "uploads";
if (!file_exists($target_dir))
mkdir($target_dir, 0777, true);
$target_dir .= "/" . basename($_FILES["file"]["name"]);
if (move_uploaded_file($_FILES["files"]["tmp_name"], $target_dir)) {
echo json_encode([
"Message" => "The file " . basename($_FILES["file"]["name"]) . "has been uploaded.",
"Status" => "OK",
"userID" => $_REQUEST["userID"]
]);
} else {
echo json_encode([
"Message" => "Sorry, there was an error uploading your file.",
"Status" => "Error",
"userID" => $_REQUEST["userID"]
]);
}
?>
我不确定这里出了什么问题。为了进行故障排除，我将 ini_set('display_errors', 1); 添加到 upload.php 并将文件的权限更改为 777，但继续在控制台中收到该消息。但是，如果我只是在浏览器中访问 http://website.com/upload.php，我会收到 {"Message":"Sorry，上传您的文件时出错。 ","Status":"Error","userID":null}
最佳答案
修复 Boundary createBodyWithParameters 上的破折号，如下所示:
func createBodyWithParameters(parameters: [String: String]?, filePathKey: String?, imageDataKey: NSData, boundary: String) -> NSData {
let body = NSMutableData();
if parameters != nil {
for (key, value) in parameters! {
body.appendString("--\(boundary)\r\n") // <----- "--" Double Dash
body.appendString("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n")
body.appendString("\(value)\r\n")
}
}
let filename = "user-profile.jpg"
let mimetype = "image/jpg"
body.appendString("--\(boundary)\r\n") // <----- "--" Double Dash
body.appendString("Content-Disposition: form-data; name=\"\(filePathKey!)\"; filename=\"\(filename)\"\r\n")
body.appendString("Content-Type: \(mimetype)\r\n\r\n")
body.appendData(imageDataKey)
body.appendString("\r\n")
body.appendString("--\(boundary)--\r\n") // <----- "--" Double Dash
return body
}
关于php - 文件上传应用程序从 PHP 文件返回内部服务器错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31715744/