如何在 Google App Engine 中缩小 HTML 响应

Question

我有一个 Spring Boot 应用程序并托管在 Google App Engine 上。 它的工作正常。 我试图缩小 html 响应。 Minify 在我的本地电脑上使用 Tomcat。

但是缩小在 Google App Engine 中不起作用。

pom.xml

<dependency>
    <groupId>com.googlecode.htmlcompressor</groupId>
    <artifactId>htmlcompressor</artifactId>
    <version>1.5.2</version>
</dependency>
<dependency>
    <groupId>com.yahoo.platform.yui</groupId>
    <artifactId>yuicompressor</artifactId>
    <version>2.4.8</version>
    <exclusions>
        <exclusion>
            <artifactId>js</artifactId>
            <groupId>rhino</groupId>
        </exclusion>
    </exclusions>
</dependency>

过滤器.java

@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
    HttpServletResponse httpResponse = (HttpServletResponse) response;
    PrintWriter outWriter;
    try {
        CharResponseWrapper responseWrapper = new CharResponseWrapper((HttpServletResponse) response);
        chain.doFilter(request, responseWrapper);
        String servletResponse = responseWrapper.toString();
        if (servletResponse != null && !servletResponse.equals("")) {
            outWriter = httpResponse.getWriter();
            outWriter.write(compressor.compress(servletResponse));
            outWriter.flush();
            outWriter.close();
        }
    } catch (Exception ex) {

    }
}

CharResponseWrapper.java

package com.app.filter;

import java.io.CharArrayWriter;
import java.io.PrintWriter;

import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;

public class CharResponseWrapper extends HttpServletResponseWrapper 
{
    private final CharArrayWriter output;

    public CharResponseWrapper(HttpServletResponse response)
    {
        super(response);
        output = new CharArrayWriter();
    }

    @Override
    public PrintWriter getWriter() 
    {
        return new PrintWriter(output);
    }
    
    @Override
    public String toString() 
    {
        return output.toString();
    }    
}

在 Google 应用引擎中

CharResponseWrapper responseWrapper = new CharResponseWrapper((HttpServletResponse) response);

responseWrapper为空；

Answer 1

您可以尝试编写一个部署脚本，用缩小的 HTML 复制您的代码，然后在部署时调用它。