com.cerner.beadledom.swagger.SwaggerUiResource Maven / Gradle / Ivy

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package com.cerner.beadledom.swagger;

import com.cerner.beadledom.jaxrs.StreamingWriterOutput;
import com.github.mustachejava.DefaultMustacheFactory;
import com.github.mustachejava.MustacheFactory;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import java.io.InputStream;
import java.util.Set;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.StreamingOutput;
import javax.ws.rs.core.UriInfo;

@Path("/meta/swagger")
public class SwaggerUiResource {
  private static final MustacheFactory MUSTACHE_FACTORY = new DefaultMustacheFactory(
      "com/cerner/beadledom/swagger");

  private static final Set ASSETS = ImmutableSet.of(
      "css/reset.css",
      "css/screen.css",
      "images/explorer_icons.png",
      "images/throbber.gif",
      "lib/backbone-min.js",
      "lib/handlebars-1.0.0.js",
      "lib/highlight.7.3.pack.js",
      "lib/jquery-1.8.0.min.js",
      "lib/jquery.ba-bbq.min.js",
      "lib/jquery.slideto.min.js",
      "lib/jquery.wiggle.min.js",
      "lib/shred.bundle.js",
      "lib/swagger.js",
      "lib/underscore-min.js",
      "lib/shred/content.js",
      "swagger-ui.js"
  );

  @GET
  @Path("/ui")
  @Produces(MediaType.TEXT_HTML)
  public StreamingOutput getSwaggerUi(@Context UriInfo uriInfo) {
    return StreamingWriterOutput.with(writer -> MUSTACHE_FACTORY.compile("ui.mustache").execute(
        writer, ImmutableMap.of(
            "apiDocsUrl",
            uriInfo.getBaseUriBuilder().path(SwaggerApiResource.class).build().toASCIIString()))
    );
  }

  // This is a terrible way to serve static assets, but this shouldn't see a lot of traffic.
  //
  // This is served at /meta/swagger, one level above the UI HTML page /meta/swagger/ui, so that the hard-coded
  // relative link to "images/throbber.gif" in swagger-ui.json will work.
  @GET
  @Path("/{asset: .+}")
  public Response getSwaggerUiAsset(@PathParam("asset") String assetPath) {
    if (!ASSETS.contains(assetPath)) {
      return Response.status(404).build();
    }

    InputStream stream = getClass().getResourceAsStream("ui-dist/" + assetPath);
    return Response.ok(stream).build();
  }
}