使用 Alamofire 上传带参数的文件

问题描述：

我正在尝试使用 Alamofire 上传文件.使用文件 (NSUrl) 时上传工作正常，但是，我似乎无法弄清楚如何使用 NSData 选项?

I am attempting to upload a file using Alamofire. The upload works fine when using a File (NSUrl), however, I cant seem to figure out how to use the NSData option?

这是我的测试:

 var url:NSURL = NSURL.URLWithString("http://localhost:8080/bike.jpeg")

 var err: NSError?
 var imageData :NSData = NSData.dataWithContentsOfURL(url,options: NSDataReadingOptions.DataReadingMappedIfSafe, error: &err)

 Alamofire.upload(.POST, "http://localhost:8080/rest/service/upload/test.png", imageData)
        .progress { (bytesWritten, totalBytesWritten, totalBytesExpectedToWrite) in
            println(totalBytesWritten)
        }
        .responseJSON { (request, response, JSON, error) in
            println(request)
            println(response)
           println(JSON)
 }

我收到状态码 415?

I am getting a status code 415?

另外，如何在上传时发送额外的参数?

Also, how can I send across additional params in the upload?

谢谢

编辑

我没有设置正确的内容类型:

I wasn't setting the correct Content-Type:

var manager = Manager.sharedInstance
manager.session.configuration.HTTPAdditionalHeaders = ["Content-Type": "application/octet-stream"]


let imageData: NSMutableData = NSMutableData.dataWithData(UIImageJPEGRepresentation(imageTest.image, 30));

Alamofire.upload(.POST, "http://localhost:8080/rest/service/upload?attachmentName=file.jpg",  imageData)
        .progress { (bytesWritten, totalBytesWritten, totalBytesExpectedToWrite) in
            println(totalBytesWritten)
        }
        .responseString { (request, response, JSON, error) in
            println(request)
            println(response)
            println(JSON)
}

仍然无法弄清楚如何在上传的同时发送额外的参数.

Still cant figure out how to send additional parameters along with the upload.

答

这里是一个简单的函数，需要目标上传 url、参数和 imageData 并返回 Alamofire.upload 上传带有参数的图像所需的 URLRequestConvertible 和 NSData.

Here is a simple function that requires the target upload url, parameters, and imageData and returns the URLRequestConvertible and NSData that Alamofire.upload requires to upload an image with parameters.

// this function creates the required URLRequestConvertible and NSData we need to use Alamofire.upload
func urlRequestWithComponents(urlString:String, parameters:Dictionary<String, String>, imageData:NSData) -> (URLRequestConvertible, NSData) {

    // create url request to send
    var mutableURLRequest = NSMutableURLRequest(URL: NSURL(string: urlString)!)
    mutableURLRequest.HTTPMethod = Alamofire.Method.POST.rawValue
    let boundaryConstant = "myRandomBoundary12345";
    let contentType = "multipart/form-data;boundary="+boundaryConstant
    mutableURLRequest.setValue(contentType, forHTTPHeaderField: "Content-Type")



    // create upload data to send
    let uploadData = NSMutableData()

    // add image
    uploadData.appendData("
--(boundaryConstant)
".dataUsingEncoding(NSUTF8StringEncoding)!)
    uploadData.appendData("Content-Disposition: form-data; name="file"; filename="file.png"
".dataUsingEncoding(NSUTF8StringEncoding)!)
    uploadData.appendData("Content-Type: image/png

".dataUsingEncoding(NSUTF8StringEncoding)!)
    uploadData.appendData(imageData)

    // add parameters
    for (key, value) in parameters {
        uploadData.appendData("
--(boundaryConstant)
".dataUsingEncoding(NSUTF8StringEncoding)!)
        uploadData.appendData("Content-Disposition: form-data; name="(key)"

(value)".dataUsingEncoding(NSUTF8StringEncoding)!)
    }
    uploadData.appendData("
--(boundaryConstant)--
".dataUsingEncoding(NSUTF8StringEncoding)!)



    // return URLRequestConvertible and NSData
    return (Alamofire.ParameterEncoding.URL.encode(mutableURLRequest, parameters: nil).0, uploadData)
}

以下是如何使用它的示例(请参阅创建并发送请求):

Here's an example of how to use it (see CREATE AND SEND REQUEST):

// init paramters Dictionary
var parameters = [
    "task": "task",
    "variable1": "var"
]

// add addtionial parameters
parameters["userId"] = "27"
parameters["body"] = "This is the body text."

// example image data
let image = UIImage(named: "177143.jpg")
let imageData = UIImagePNGRepresentation(image)



// CREATE AND SEND REQUEST ----------

let urlRequest = urlRequestWithComponents("http://example.com/uploadText/", parameters: parameters, imageData: imageData)

Alamofire.upload(urlRequest.0, urlRequest.1)
    .progress { (bytesWritten, totalBytesWritten, totalBytesExpectedToWrite) in
        println("(totalBytesWritten) / (totalBytesExpectedToWrite)")
    }
    .responseJSON { (request, response, JSON, error) in
        println("REQUEST (request)")
        println("RESPONSE (response)")
        println("JSON (JSON)")
        println("ERROR (error)")
}

如果您需要目标 url 的 php 文件(在同一目录中有一个上传"文件夹):

And if you need the php file for the target url (with an 'uploads' folder in the same directory):

// get picture variables
$file       = $_FILES['file']['tmp_name'];
$fileName   = $_FILES['file']['name'];
$fileType   = $_FILES['file']['type'];

// check extension
$allowedExts = array("jpg", "jpeg", "png");
$rootName = reset(explode(".", $fileName));
$extension = end(explode(".", $fileName));

// create new file name
$time = time();
$newName = $rootName.$time.'.'.$extension;

// temporarily save file
$moved = move_uploaded_file($_FILES["file"]["tmp_name"], "uploads/".$newName );
if ($moved) $path = "uploads/".$newName;

$body = $_POST['body'];
$userId = $_POST['userId'];


$time = time();
if ($moved) {
    $fullUrl = "http://antiblank.com/testPhotoUpload/".$path;
    $arrayToSend = array('status'=>'success','time'=>$time,'body'=>$body,'userId'=>$userId, "imageURL"=>$fullUrl);
} else {
    $arrayToSend = array('status'=>'FAILED','time'=>$time,'body'=>$body,'userId'=>$userId);
}

header('Content-Type:application/json');
echo json_encode($arrayToSend);

使用 Alamofire 上传带参数的文件

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