Hi ,
I am trying to set up a route that
1) receives a http get request
2) extract a query parameter from the HttpRequest.
3) forward the extracted query parameter to another endpoint.
4) Return an 1 by 1 pixel image to the http get request sender.
I managed to do all the above, but the returned 1 by 1 image also contains the
original query parameter.
Below is my code.
public class JettyHttpServerDemo {
private CamelContext context;
public void run() throws Exception {
context = new DefaultCamelContext();
// add our route to the CamelContext
context.addRoutes(new RouteBuilder() {
@Override
public void configure() {
from("jetty:http://localhost:8081/test?matchOnUriPrefix=true";)
.process(new ImageProcessor()).to("stream:out");
}
});
context.start();
Thread.sleep(1000000);
}
private static class ImageProcessor implements Processor {
private BufferedImage pixel;
public ImageProcessor() {
pixel = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
pixel.setRGB(0, 0, (0xFF));
}
public void process(Exchange exchange) throws Exception {
HttpServletRequest request = exchange.getIn().getBody(
HttpServletRequest.class);
String name = request.getParameter("name");
exchange.getIn().setBody("name=" + name);
// send a response with 1 pixel.
HttpServletResponse response = exchange.getIn().getBody(
HttpServletResponse.class);
response.setContentType("image/png");
OutputStream os = response.getOutputStream();
ImageIO.write(pixel, "png", os);
}
}
public static void main(String[] args) throws Exception {
JettyHttpServerDemo demo = new JettyHttpServerDemo();
demo.run();
}
-----------------
public class JettyHttpGetClient {
private CamelContext context;
public void send() throws Exception{
context = new DefaultCamelContext();
ProducerTemplate template = context.createProducerTemplate();
Exchange exchange = template.send("http://localhost:8081/test";, new
Processor() {
public void process(Exchange exchange) throws Exception {
exchange.getIn().setHeader(Exchange.HTTP_QUERY, "name=foo");
}
});
Message out = exchange.getOut();
InputStream reply = (InputStream) exchange.getOut().getBody();
// replyStr also contains the query parameter name=foo !
String replyStr= inputStreamToString(reply);
System.out.println("Response from http server has size :"+
replyStr.length());
System.out.println("Response from http server is :"+ replyStr);
System.out.println("status header is
"+out.getHeader(Exchange.HTTP_RESPONSE_CODE));
}
private String inputStreamToString(InputStream inputStream) throws
Exception{
BufferedReader in = new BufferedReader(
new InputStreamReader(inputStream));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
return response.toString();
}
public static void main(String [] args) throws Exception{
JettyHttpGetClient client = new JettyHttpGetClient();
client.send();
}
}
-----------------------------
In debug mode, I can see that replyStr also contains "name=foo".
Is there a way to return a 1 by 1 pixel image without the original query
parameter ?
Thanks in advance for any assistance !
Shing
