html之Swift之multipart/form-data之如何定义边界/填充 HTML 正文

我正在尝试在 Swift 中为 multipart/form-data-request 定义边界。我的问题是如何在 Swift 中定义这个边界(最有效的方式)。我想发送一个包含 ID 和姓名等数据的请求。

实际状态:

 let url = NSURL(string: "http://test.bla") 
 let request = NSMutableURLRequest(URL: url!) 
 
 // Set HTTPMethod for actual request 
 request.HTTPMethod = "POST" 

实际问题:

• 如何定义边界
• 如何用必要的数据填充 html 正文

请您参考如下方法:

这是上传图片需要定义边界的代码

    var TWITTERFON_FORM_BOUNDARY:String = "AaB03x" 
    let url = NSURL(string: url)! 
    var request:NSMutableURLRequest = NSMutableURLRequest(URL: url, cachePolicy: NSURLRequestCachePolicy.ReloadIgnoringLocalCacheData, timeoutInterval: 10) 
    var MPboundary:String = "--\(TWITTERFON_FORM_BOUNDARY)" 
    var endMPboundary:String = "\(MPboundary)--" 
    var data:NSData = UIImagePNGRepresentation(image) 
    var body:NSMutableString = NSMutableString(); 
    // params 
    if parameters != nil { 
        for (key, value) in parameters! { 
            body.appendFormat("\(MPboundary)\r\n") 
            body.appendFormat("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n") 
            body.appendFormat("\(value)\r\n") 
        } 
    } 
    // image upload 
    body.appendFormat("%@\r\n",MPboundary) 
    body.appendFormat("Content-Disposition: form-data; name=\"\(filename)\"; filename=\"pen111.png\"\r\n") 
    body.appendFormat("Content-Type: image/png\r\n\r\n") 
    var end:String = "\r\n\(endMPboundary)" 
    var myRequestData:NSMutableData = NSMutableData(); 
    myRequestData.appendData(body.dataUsingEncoding(NSUTF8StringEncoding)!) 
    myRequestData.appendData(data) 
    myRequestData.appendData(end.dataUsingEncoding(NSUTF8StringEncoding)!) 
    var content:String = "multipart/form-data; boundary=\(TWITTERFON_FORM_BOUNDARY)" 
    request.setValue(content, forHTTPHeaderField: "Content-Type") 
    request.setValue("\(myRequestData.length)", forHTTPHeaderField: "Content-Length") 
    request.HTTPBody = myRequestData 
    request.HTTPMethod = "POST" 
    .........