Question

我在名为jetty的服务器上传文件时遇到问题。

我有用于多部分文件上传的代码

   func post(url: String,ticketId: String, workLogDecs: String, status: String,img: UIImage){

    var request = NSMutableURLRequest(URL: NSURL(string: "\(baseURL)\(url)")!)


    let imageData = UIImageJPEGRepresentation(img, 1)


    let parameters = ["workLogDesc":"\(workLogDecs)","requestId":"\(ticketId)","status":"\(status)"]

    let boundary = generateBoundaryString()

    request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")





    request.HTTPBody = createBodyWithParameters(parameters, filePathKey: "files", imageDataKey: imageData, boundary: boundary)

    let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
        data, response, error in

        if error != nil {
            println("error=\(error)")

            var userInfo = error.userInfo
            var errorString = userInfo?.description

            println("errorString \(errorString)")
            return

        }

        // You can print out response object
        println("******* response = \(response)")

        // Print out reponse body
        let responseString = NSString(data: data, encoding: NSUTF8StringEncoding)
        println("****** response data = \(responseString!)")
    }
    task.resume()
}

这是我用params创建body的代码：

    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 = "test.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)"
}

我使用扩展名：

extension NSMutableData {
func appendString(string: String) {
    let data = string.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)
    appendData(data!)
}

我的问题是我收到错误并说“无法解析响应”

这是我的错误日志：

Error Domain=NSURLErrorDomain Code=-1017 "cannot parse response" UserInfo=0x7ff43a74c850 {NSUnderlyingError=0x7ff43a6b4660 "The operation couldn’t be completed. (kCFErrorDomainCFNetwork error -1017.)", NSErrorFailingURLStringKey=http://192.168.137.160:8082/ws/worklog/new, NSErrorFailingURLKey=http://192.168.137.160:8082/ws/worklog/new, _kCFStreamErrorDomainKey=4, _kCFStreamErrorCodeKey=-1, NSLocalizedDescription=cannot parse response}

我的代码有问题。我是这个多部分文件上传的新手。如果还有其他方法可以帮助我。感谢。

Answer 1

看起来您的代码可能来自this answer，但引入了一些问题：

如果您使用单个短划线，则需要两个破折号，例如：

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")
    }
}

和

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")

注意，对你的破折号要非常非常小心。问题代码示例中的破折号似乎是连字符，而不仅仅是连字符。（有些文字处理器会用一个短划线代替两个连字符......它也解释了第1点，那个额外的连字符消失了。）
此外，您似乎没有设置请求的HTTPMethod：
```
request.HTTPMethod = "POST"
```

最后一点是您问题中错误的实际来源。但是你还必须修复连字符，否则请求仍然会失败。

Swift

1 个答案: