如何像 Servlet 一样在 Wicket 中处理二进制流?

问题描述

使用 Servlet，我可以执行以下操作来处理二进制流:

Using Servlet, I can do the following to process binary stream:

public void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

    InputStream inputStream = req.getInputStream();
    byte[] data = IOUtils.toByteArray(inputStream);

    // ...
    Result result = process(data);
    // ...

    ServletOutputStream op = resp.getOutputStream();
    result.writeTo(resp.getOutputStream());
}

我如何在 Wicket 中做到这一点?(创建页面后我没有任何线索扩展 WebPage 类)

How I can do this in Wicket? (I have no clue after creating a page extends WebPage class)

推荐答案

我现在使用AbstractResourceStreamWriter来实现解决方案:

I am now using AbstractResourceStreamWriter to implement the solution:

public MyApiPage(final PageParameters pageParameters) {

    HttpServletRequest httpServletRequest = getHttpRequest();
    byte[] data = IOUtils.toByteArray(httpServletRequest.getInputStream());
    IResourceStream resourceStream = new MyApiResourceStream(data);
    getRequestCycle().scheduleRequestHandlerAfterCurrent(new ResourceStreamRequestHandler(resourceStream));
}

private class MyApiResourceStream extends AbstractResourceStreamWriter {

    private byte[] data;
    public MyApiResourceStream(byte[] data) {
        this.data = data;
    }

    @Override
    public void write(Response webResponse) {
        byte[] convertedData = // do some works here...
        webResponse.write(convertedData);

    }
}

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