Created
February 15, 2013 14:27
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Jersey Filter *Prototype* that uses PhantomJS to retrieve pages asked by Googlebot. This way the javascript is interpreted by phantomjs and it provides a static webpage to Google.
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| package main; | |
| import com.google.common.base.Strings; | |
| import com.google.common.io.ByteStreams; | |
| import com.sun.jersey.spi.container.ContainerRequest; | |
| import com.sun.jersey.spi.container.ContainerResponse; | |
| import com.sun.jersey.spi.container.ContainerResponseFilter; | |
| import javax.ws.rs.core.MediaType; | |
| import javax.ws.rs.core.Response; | |
| import java.io.File; | |
| public class SEOFilter implements ContainerResponseFilter { | |
| @Override | |
| public ContainerResponse filter(ContainerRequest request, ContainerResponse response) { | |
| String method = request.getMethod(); | |
| if (!method.equals("GET")) { | |
| return response; | |
| } | |
| String userAgent = Strings.nullToEmpty(request.getRequestHeaders().getFirst("User-agent")); | |
| //if (!userAgent.contains("Chrome")) { | |
| if (!userAgent.contains("Googlebot")) { | |
| return response; | |
| } | |
| String uri = request.getAbsolutePath().toString(); | |
| if (uri.endsWith(".jpg") || uri.endsWith(".gif") || uri.endsWith(".png")) { | |
| return response; | |
| } | |
| if (uri.endsWith(".css") || uri.endsWith(".js") || uri.endsWith(".map")) { | |
| return response; | |
| } | |
| System.out.println("Google is in the house! " + uri); | |
| try { | |
| Process process = new ProcessBuilder("phantomjs", "download.js", uri) | |
| .directory(new File(".")) | |
| .redirectErrorStream(true) | |
| .start(); | |
| process.waitFor(); | |
| byte[] body = ByteStreams.toByteArray(process.getInputStream()); | |
| String page = "<!DOCTYPE html>" + new String(body); | |
| response.setResponse(Response | |
| .fromResponse(response.getResponse()) | |
| .type(MediaType.TEXT_HTML_TYPE) | |
| .entity(page) | |
| .build()); | |
| } catch (Exception e) { | |
| e.printStackTrace(); | |
| } | |
| return response; | |
| } | |
| } |
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