用jax-rs发送临时文件 [英] Send temp file with jax-rs

问题描述

我正在尝试使用jax-rs发送一个临时文件，并在下载完成后删除该临时文件.为此，我将InputSream细分为子类，以便在流关闭时得到通知.这是我到目前为止所拥有的:

I am trying to send a temporary file with jax-rs and delete the temporary file once the download is done. For that purpose I subclassed InputSream in order to be notified once the stream is closed. This is what I have so far:

@GET
@Path("download/{fileName}")
public Response downloadFile(@PathParam("fileName") String fileName) {
    InputStream inputStream = new InputStreamWithFileDeletion(new getFile(filename));

    Response.ResponseBuilder response = Response.ok((Object) file);
    response.header("Content-Disposition",
            "attachment; filename="+"fileName"+".xls");
    return response.build();
}

InputStreamWithFileDeletion:

InputStreamWithFileDeletion:

public class InputStreamWithFileDeletion extends FileInputStream {
    File f;

    public InputStreamWithFileDeletion(File file) throws FileNotFoundException {
        super(file);
        f = file;
    }

    @Override
    public void close() throws IOException {
        super.close();
        f.delete();
    }
}

不幸的是，一旦下载完成，就不会调用close().我想念什么吗?

Unfortunately, once the download is done, close() is not called. Am I missing something?

推荐答案

更改

Response.ResponseBuilder response = Response.ok((Object) file);

到

Response.ResponseBuilder response = Response.ok(inputStream);

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