80 lines
3.4 KiB
Java
80 lines
3.4 KiB
Java
/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.example.http2.tiles;
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import static io.netty.util.CharsetUtil.UTF_8;
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import java.util.Random;
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/**
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* Static and dynamically generated HTML for the example.
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*/
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public final class Html {
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public static final String IP = System.getProperty("ip", "127.0.0.1");
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public static final byte[] FOOTER = "</body></html>".getBytes(UTF_8);
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public static final byte[] HEADER = ("<!DOCTYPE html><html><head lang=\"en\"><title>Netty HTTP/2 Example</title>"
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+ "<style>body {background:#DDD;} div#netty { line-height:0;}</style>"
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+ "<link rel=\"shortcut icon\" href=\"about:blank\">"
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+ "<meta charset=\"UTF-8\"></head><body>A grid of 200 tiled images is shown below. Compare:"
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+ "<p>[<a href='https://" + url(Http2Server.PORT) + "?latency=0'>HTTP/2, 0 latency</a>] [<a href='http://"
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+ url(HttpServer.PORT) + "?latency=0'>HTTP/1, 0 latency</a>]<br/>" + "[<a href='https://"
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+ url(Http2Server.PORT) + "?latency=30'>HTTP/2, 30ms latency</a>] [<a href='http://" + url(HttpServer.PORT)
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+ "?latency=30'>HTTP/1, 30ms latency</a>]<br/>" + "[<a href='https://" + url(Http2Server.PORT)
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+ "?latency=200'>HTTP/2, 200ms latency</a>] [<a href='http://" + url(HttpServer.PORT)
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+ "?latency=200'>HTTP/1, 200ms latency</a>]<br/>" + "[<a href='https://" + url(Http2Server.PORT)
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+ "?latency=1000'>HTTP/2, 1s latency</a>] [<a href='http://" + url(HttpServer.PORT)
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+ "?latency=1000'>HTTP/1, " + "1s latency</a>]<br/>").getBytes(UTF_8);
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private static final int IMAGES_X_AXIS = 20;
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private static final int IMAGES_Y_AXIS = 10;
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private Html() {
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}
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private static String url(int port) {
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return IP + ":" + port + "/http2";
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}
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public static byte[] body(int latency) {
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int r = Math.abs(new Random().nextInt());
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// The string to be built contains 13192 fixed characters plus the variable latency and random cache-bust.
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int numberOfCharacters = 13192 + stringLength(latency) + stringLength(r);
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StringBuilder sb = new StringBuilder(numberOfCharacters).append("<div id=\"netty\">");
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for (int y = 0; y < IMAGES_Y_AXIS; y++) {
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for (int x = 0; x < IMAGES_X_AXIS; x++) {
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sb.append("<img width=30 height=29 src='/http2?x=")
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.append(x)
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.append("&y=").append(y)
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.append("&cachebust=").append(r)
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.append("&latency=").append(latency)
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.append("'>");
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}
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sb.append("<br/>\r\n");
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}
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sb.append("</div>");
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return sb.toString().getBytes(UTF_8);
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}
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private static int stringLength(int value) {
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return Integer.toString(value).length() * IMAGES_X_AXIS * IMAGES_Y_AXIS;
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}
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}
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