以数据块拆分数据并上传到服务器

I have a file that needed to be uploaded to a server and I have been told to separate the file into multiple chunks before uploading. So here is the question:

我有一个文件需要上传到服务器，我被告知在上传之前将文件分成多个块。所以这是一个问题：

1) I have converted the file into "Data" type (bytes). How do I split it into chunks of 1MB each?
2) After splitting, how do I upload it using Alamofire? if not possible using Alamofire, pls recommend how do I do it.

1）我已将文件转换为“数据”类型（字节）。如何将其拆分为每个1MB的块？ 2）拆分后，如何使用Alamofire上传？如果不能使用Alamofire，请推荐我该怎么做。

I'm using swift 3 and Code 8.3. Any help is much appreciated.

我正在使用swift 3和Code 8.3。任何帮助深表感谢。

1 个解决方案

#1

I think this may work

我认为这可行

let path = Bundle.main.url(forResource: "test", withExtension: "png")!

do
{
    let data = try Data(contentsOf: path)
    let dataLen = (data as NSData).length
    let fullChunks = Int(dataLen / 1024) // 1 Kbyte
    let totalChunks = fullChunks + (dataLen % 1024 != 0 ? 1 : 0)

    var chunks:[Data] = [Data]()
    for chunkCounter in 0..<totalChunks
    {
        var chunk:Data
        let chunkBase = chunkCounter * 1024
        var diff = 1024
        if chunkCounter == totalChunks - 1
        {
            diff = dataLen - chunkBase
        }

        let range:Range<Data.Index> = Range<Data.Index>(chunkBase..<(chunkBase + diff))
        chunk = data.subdata(in: range)

        chunks.append(chunk)
    }

    // Send chunks as you want
    debugPrint(chunks)
}
catch
{
    // Handle error        
}