http-headers - 如何使用 NanoHttpd 响应发送文件名

Question

我已经使用 NanoHttpd 在本地网络上成功实现了文件传输。但是，我无法在 NanoHttpd 响应中发送文件名。接收到的文件具有这样的默认名称：localhost_8080。我尝试使用在响应标头中附加文件名Content-disposition，但我的文件传输都失败了。我究竟做错了什么？这是我的实现：

private class WebServer extends NanoHTTPD {
    String MIME_TYPE;
    File file;

    public WebServer() {
        super(PORT);
    }

    @Override
    public Response serve(String uri, Method method,
            Map<String, String> header, Map<String, String> parameters,
            Map<String, String> files) {
        try {
            file=new File(fileToStream);
            fis = new FileInputStream(file);
            bis = new BufferedInputStream(fis);
            MIME_TYPE= URLConnection.guessContentTypeFromName(file.getName());
        } catch (IOException ioe) {
            Log.w("Httpd", ioe.toString());
        }
        NanoHTTPD.Response res=new NanoHTTPD.Response(Status.OK, MIME_TYPE, bis);
        res.addHeader("Content-Disposition: attachment; filename=", file.getName());
        return res;
    }
}

谢谢你的帮助！

Answer 1

You need to specify the response, the MIME type, and the stream of bytes to be sent. After that you just add a header with the file name of the file since its a http method. Here is a sample code that solves the problem

@Override
public Response serve(String uri, Method method,
    Map<String, String> header, Map<String, String> parameters,
    Map<String, String> files) {

    FileInputStream fis = null;
    try {
        fis = new FileInputStream(fileName);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }

    NanoHTTPD.Response res = new NanoHTTPD.Response(Response.Status.OK, "application/vnd.android.package-archive", fis);
    res.addHeader("Content-Disposition", "attachment; filename=\""+fileName+"\""); 
    return res;

}