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|
<!DOCTYPE html>
<html>
<head>
<title>adblock Map</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css"
integrity="sha256-p4NxAoJBhIIN+hmNHrzRCf9tD/miZyoHS5obTRR9BMY=" crossorigin="" />
<style>
html {
color-scheme: light dark;
--adb-water: #d6e3ec;
--adb-land: #f4f1ea;
--adb-coast: #a9a396;
--adb-grid: #c2d2de;
--adb-label: #97a3ad;
}
@media (prefers-color-scheme: dark) {
html {
--adb-water: #151b21;
--adb-land: #2a3138;
--adb-coast: #4d5862;
--adb-grid: #232b33;
--adb-label: #5d6a75;
}
}
html,
body {
height: 100%;
margin: 0;
}
#map {
height: 100%;
width: 100%;
}
.leaflet-container {
background: var(--adb-water);
}
/* Leaflet positions the icon element itself, so center on the inner span */
.continent span {
position: absolute;
transform: translate(-50%, -50%);
white-space: nowrap;
font-size: 11px;
font-weight: 600;
letter-spacing: 0.18em;
text-transform: uppercase;
color: var(--adb-label);
}
.title {
display: block;
text-align: center;
font-weight: bold;
}
.mono {
font-size: small;
font-family: monospace;
white-space: nowrap;
margin: 0.3em !important;
}
.entry {
margin-top: 0.5em !important;
}
</style>
</head>
<body>
<div id="map"></div>
<script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"
integrity="sha256-20nQCchB9co0qIjJZRGuk2/Z9VM+kNiyxNV1lvTlZBo=" crossorigin=""></script>
<script>
'use strict';
/* maximum display length of the free form GeoIP fields */
const MAX_IP_LEN = 38;
const MAX_AS_LEN = 38;
const MAX_CITY_LEN = 33;
const MAX_DOMAIN_LEN = 38;
/* maximum number of domains listed in a shared popup */
const MAX_DOMAINS = 5;
/* zoom level of the initial view */
const OVERVIEW_ZOOM = 3;
/* continent labels are dropped as soon as the outlines carry the orientation */
const LABEL_ZOOM = 4;
/* The outlines are shipped without attributes, so the labels are placed here */
const CONTINENTS = [
{ name: 'North America', latlng: [48, -100] },
{ name: 'South America', latlng: [-13, -58] },
{ name: 'Europe', latlng: [56, 26] },
{ name: 'Africa', latlng: [4, 20] },
{ name: 'Asia', latlng: [46, 92] },
{ name: 'Oceania', latlng: [-25, 137] },
{ name: 'Antarctica', latlng: [-72, 15] }
];
/* country outlines shipped with the package, Natural Earth 1:110m, public domain */
const WORLD_FILE = 'world.json';
/* optional higher detail outlines, not shipped, see the adblock README */
const WORLD_FILE_HD = 'world-50m.json';
/* spacing of the graticule in degrees */
const GRID_STEP = 20;
/* mapData key holding the geo data of the local uplink(s) */
const HOME_KEY = 'homeIP';
const HOME_STYLE = { color: '#378242', opacity: 1.0, fillColor: '#378242', fillOpacity: 0.5, radius: 6 };
const BLOCKED_STYLE = { color: '#C22121', opacity: 1.0, fillColor: '#C22121', fillOpacity: 0.5, radius: 3 };
/* initialize map */
const map = L.map('map', {
zoom: 3,
minZoom: 2,
maxZoom: 6,
center: [50, 10]
});
map.attributionControl.addAttribution('<a href="https://www.naturalearthdata.com">Natural Earth</a>');
/* the basemap is drawn from local country outlines instead of a tile service */
map.createPane('basemap');
map.getPane('basemap').style.zIndex = 200;
const basemapRenderer = L.canvas({ pane: 'basemap' });
function cssColor(name) {
return getComputedStyle(document.documentElement).getPropertyValue(name).trim();
}
function landStyle() {
return { color: cssColor('--adb-coast'), weight: 0.7, opacity: 1.0, fillColor: cssColor('--adb-land'), fillOpacity: 1.0 };
}
function gridStyle() {
return { color: cssColor('--adb-grid'), weight: 0.6, opacity: 1.0 };
}
/* the empty ocean is hard to read at low zoom levels, so add a plain graticule */
function graticule() {
const lines = [];
let value;
for (value = -80; value <= 80; value += GRID_STEP)
lines.push([[value, -180], [value, 180]]);
for (value = -180; value <= 180; value += GRID_STEP)
lines.push([[-85, value], [85, value]]);
return lines;
}
const gridLayer = L.polyline(graticule(), Object.assign({
pane: 'basemap',
renderer: basemapRenderer,
interactive: false
}, gridStyle())).addTo(map);
let landLayer = null;
const labelLayer = L.layerGroup(CONTINENTS.map(function (item) {
return L.marker(item.latlng, {
pane: 'basemap',
interactive: false,
keyboard: false,
icon: L.divIcon({
className: 'continent',
html: '<span>' + item.name + '</span>',
iconSize: [0, 0]
})
});
}));
function updateLabels() {
const wanted = map.getZoom() <= LABEL_ZOOM;
if (wanted !== map.hasLayer(labelLayer))
wanted ? labelLayer.addTo(map) : labelLayer.remove();
}
map.on('zoomend', updateLabels);
updateLabels();
function loadWorld(file) {
return fetch(file).then(function (response) {
if (!response.ok)
throw new Error(file + ': HTTP ' + response.status);
return response.json();
});
}
/* prefer the optional outlines, their absence is the normal case */
loadWorld(WORLD_FILE_HD)
.catch(function () {
return loadWorld(WORLD_FILE);
})
.then(function (world) {
landLayer = L.geoJSON(world, {
pane: 'basemap',
renderer: basemapRenderer,
interactive: false,
smoothFactor: 1.2,
style: landStyle
}).addTo(map);
})
.catch(function (error) {
/* the markers stay usable on the plain background */
console.error('adblock: unable to load the basemap,', error);
});
/* restyle in place when the browser switches between the light and dark scheme */
const colorScheme = window.matchMedia('(prefers-color-scheme: dark)');
if (colorScheme.addEventListener)
colorScheme.addEventListener('change', function () {
gridLayer.setStyle(gridStyle());
if (landLayer)
landLayer.setStyle(landStyle());
});
/* feature groups, so getBounds() is available for the initial view */
const blockedLayer = L.featureGroup().addTo(map);
const homeLayer = L.featureGroup().addTo(map);
/* accept a coordinate only if it is a finite number in range */
function toLatLng(geo) {
const lat = Number(geo.lat);
const lon = Number(geo.lon);
if (geo.lat === null || geo.lat === undefined || geo.lat === '' ||
geo.lon === null || geo.lon === undefined || geo.lon === '')
return null;
if (!Number.isFinite(lat) || !Number.isFinite(lon))
return null;
if (lat < -90 || lat > 90 || lon < -180 || lon > 180)
return null;
return [lat, lon];
}
/* GeoIP lookups regularly return empty city/as fields, keep the entry anyway */
function fieldText(value, maxLength) {
const text = String(value === null || value === undefined ? '' : value).trim();
if (!text)
return 'n/a';
return text.length > maxLength ? text.slice(0, maxLength - 1) + '\u2026' : text;
}
function plural(count, noun) {
return count + ' ' + noun + (count === 1 ? '' : 's');
}
/*
* Popups are built as DOM nodes, not as HTML strings, so neither the blocked
* domain nor the third party GeoIP fields can be interpreted as markup.
* Passing a function to bindPopup() defers this until the popup is opened.
*/
function buildPopup(title, blocks) {
const content = document.createElement('div');
const heading = document.createElement('span');
heading.className = 'title';
heading.textContent = title;
content.appendChild(heading);
blocks.forEach(function (lines, index) {
const body = document.createElement('p');
body.className = index ? 'mono entry' : 'mono';
lines.forEach(function (line, pos) {
if (pos)
body.appendChild(document.createElement('br'));
body.appendChild(document.createTextNode(line));
});
content.appendChild(body);
});
return content;
}
function locationLines(geo, latlng) {
return [
'City: ' + fieldText(geo.city, MAX_CITY_LEN) + ' (' + fieldText(geo.countryCode, 8) + ')',
'Latitude : ' + latlng[0],
'Longitude: ' + latlng[1]
];
}
function homePopup(entry) {
const geo = entry.items[0].geo;
const more = entry.items.length > 1 ? ' (+' + (entry.items.length - 1) + ' more)' : '';
return buildPopup('local IP', [locationLines(geo, entry.latlng).concat([
'IP: ' + fieldText(geo.query, MAX_IP_LEN) + more,
'AS: ' + fieldText(geo.as, MAX_AS_LEN)
])]);
}
/*
* Blocked ad domains cluster heavily on a few CDN endpoints, so one coordinate
* regularly carries several of them. List them instead of keeping the first one
* and dropping the rest.
*/
function blockedPopup(entry) {
const items = entry.items;
const geo = items[0].geo;
const blocks = [locationLines(geo, entry.latlng)];
if (items.length === 1)
return buildPopup(items[0].name, [blocks[0].concat([
'IP: ' + fieldText(geo.query, MAX_IP_LEN),
'AS: ' + fieldText(geo.as, MAX_AS_LEN)
])]);
items.slice(0, MAX_DOMAINS).forEach(function (item) {
blocks.push([
fieldText(item.name, MAX_DOMAIN_LEN),
fieldText(item.geo.query, MAX_IP_LEN),
fieldText(item.geo.as, MAX_AS_LEN)
]);
});
if (items.length > MAX_DOMAINS)
blocks.push(['(+' + (items.length - MAX_DOMAINS) + ' more)']);
return buildPopup(plural(items.length, 'blocked domain'), blocks);
}
function addMarker(layer, entry, style, popupBuilder) {
L.circleMarker(entry.latlng, style)
.bindPopup(function () {
return popupBuilder(entry);
})
.addTo(layer);
}
/* markers sharing a coordinate become one marker carrying every entry */
function addEntry(list, index, name, geo, latlng) {
const key = latlng[0] + ',' + latlng[1];
const known = index.get(key);
if (known) {
known.items.push({ name: name, geo: geo });
return;
}
const entry = { latlng: latlng, items: [{ name: name, geo: geo }] };
index.set(key, entry);
list.push(entry);
}
/*
* mapData is an array of single key objects, the key being either homeIP or
* a blocked domain:
*
* [ {}, { "homeIP": {...} }, { "ads.example.com": {...} }, ... ]
*/
function collectEntries(parsedData) {
const result = { home: [], blocked: [] };
const homeIndex = new Map();
const blockedIndex = new Map();
parsedData.forEach(function (item) {
if (!item || typeof item !== 'object')
return;
Object.keys(item).forEach(function (name) {
const geo = item[name];
if (!geo || typeof geo !== 'object')
return;
const latlng = toLatLng(geo);
if (!latlng)
return;
if (name === HOME_KEY)
addEntry(result.home, homeIndex, name, geo, latlng);
else
addEntry(result.blocked, blockedIndex, name, geo, latlng);
});
});
return result;
}
/* load the data handed over by the adblock report page */
const mapData = sessionStorage.getItem('mapData');
let parsedData = null;
if (mapData) {
try {
parsedData = JSON.parse(mapData);
} catch (error) {
console.error('adblock: unable to parse mapData,', error);
}
}
if (Array.isArray(parsedData)) {
const entries = collectEntries(parsedData);
/* blocked first, so the local uplink stays on top and clickable */
entries.blocked.forEach(function (entry) {
addMarker(blockedLayer, entry, BLOCKED_STYLE, blockedPopup);
});
entries.home.forEach(function (entry) {
addMarker(homeLayer, entry, HOME_STYLE, homePopup);
});
/* The overall view stays zoomed out, center on the local uplink(s) */
const home = homeLayer.getLayers();
if (home.length)
map.setView(home[0].getLatLng(), OVERVIEW_ZOOM);
else if (blockedLayer.getLayers().length)
map.setView(blockedLayer.getBounds().getCenter(), OVERVIEW_ZOOM);
}
</script>
</body>
</html>
|
