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Handle old versions properly

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This commit is contained in:
Roman Tsisyk 2022-09-01 15:53:44 +03:00
parent fbb410b155
commit 46544dd96a
1 changed files with 57 additions and 20 deletions
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77
src/index.ts
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@ -2,17 +2,42 @@ export { };
// TODO: Implement automated version checks from this metaserver script.
// It should check by cron if actual files are really available on all servers.
const LAST_AVAILABLE_VERSION = 220103;
const BEFORE_LAST_AVAILABLE_VERSION = 220204;
const SERVER = {
backblaze: 'https://cdn-us1.organicmaps.app/', // BackBlaze + CloudFlare (US-West) unmetered.
uk1: 'https://cdn-uk1.organicmaps.app/', // Mythic Beasts VPS (London, UK) 200TB/mo.
nl1: 'https://cdn-nl1.organicmaps.app/', // Mythic Beasts VPS (Amsterdam, NL) 200TB/mo.
planet: 'https://cdn.organicmaps.app/', // Hetzner BareMetal (Falkenstein, Germany) unmetered
fi1: 'https://cdn-fi1.organicmaps.app/', // Hetzner Cloud (Helsinki, Finland), 20TB/mo
de1: 'https://cdn-eu2.organicmaps.app/', // Hetzner Cloud (Falkenstein, Germany), 20TB/mo
us2: 'https://cdn-us2.organicmaps.app/', // Hetzner Cloud (Asburn, US East), 20TB/mo
backblaze: {
// BackBlaze + CloudFlare (US-West) unmetered.
url: 'https://cdn-us1.organicmaps.app/',
dataVersions: [210529, 210703, 210729, 210825, 211002, 211022, 211122, 220103, 220204, 220314, 220415, 220515, 220613, 220718, 220816]
},
uk1: {
// Mythic Beasts VPS (London, UK) 200TB/mo.
url: 'https://cdn-uk1.organicmaps.app/',
dataVersions: [220613, 220718, 220816]
},
nl1: {
// // Mythic Beasts VPS (Amsterdam, NL) 200TB/mo.
url: 'https://cdn-nl1.organicmaps.app/',
dataVersions: [220613, 220718, 220816]
},
planet: {
// Hetzner BareMetal (Falkenstein, Germany) unmetered
url: 'https://cdn.organicmaps.app/',
dataVersions: [220103, 220204, 220314, 220415, 220515, 220613, 220718, 220816]
},
fi1: {
// Hetzner Cloud (Helsinki, Finland), 20TB/mo
url: 'https://cdn-fi1.organicmaps.app/',
dataVersions: [220718, 220816]
},
de1: {
// Hetzner Cloud (Falkenstein, Germany), 20TB/mo
url: 'https://cdn-eu2.organicmaps.app/',
dataVersions: [220718, 220816]
},
us2: {
// Hetzner Cloud (Asburn, US East), 20TB/mo
url: 'https://cdn-us2.organicmaps.app/',
dataVersions: [220718, 220816]
}
};
// Main entry point.
@ -24,7 +49,7 @@ addEventListener('fetch', (event) => {
// of their current maps data version, for example, "211022" (October 22, 2021).
// It is lowercased by Cloudflare.
// Returns 0 if data version is absent or invalid, or a valid integer version.
function extractDataVersion(request: Request): Number {
function extractDataVersion(request: Request): number {
const strDataVersion = request.headers.get('x-om-dataversion');
if (strDataVersion) {
const dataVersion = parseInt(strDataVersion);
@ -43,23 +68,35 @@ async function handleRequest(request: Request) {
case '/servers': { // Private for map files.
let servers;
const dataVersion = extractDataVersion(request);
if (dataVersion < LAST_AVAILABLE_VERSION) {
// Old maps versions are available only on BackBlaze.
servers = [SERVER.backblaze];
} else if (dataVersion < BEFORE_LAST_AVAILABLE_VERSION) {
// Some servers have one additional version available.
servers = [SERVER.uk1, SERVER.nl1, SERVER.backblaze];
if (dataVersion == 0) {
servers = [SERVER.backblaze]
} else switch (request.cf?.continent) {
// See https://developers.cloudflare.com/firewall/cf-firewall-language/fields for a list of all continents.
case 'NA': // North America
case 'SA': // South America
case 'OC': // Oceania
servers = [SERVER.backblaze, SERVER.us2, SERVER.uk1, SERVER.nl1, SERVER.planet];
servers = [SERVER.backblaze, SERVER.us2, SERVER.uk1, SERVER.nl1, SERVER.planet]
.filter(server => server.dataVersions.includes(dataVersion))
if (servers.length == 0) {
servers = [SERVER.planet]
}
break;
default: // Every other continent + Tor networks.
servers = [SERVER.planet, SERVER.uk1, SERVER.nl1, SERVER.fi1, SERVER.de1];
servers = [SERVER.planet, SERVER.uk1, SERVER.nl1, SERVER.fi1, SERVER.de1]
.filter(server => server.dataVersions.includes(dataVersion))
if (servers.length == 0) {
if (SERVER.backblaze.dataVersions.includes(dataVersion)) {
servers = [SERVER.backblaze]
} else {
servers = [SERVER.planet]
}
}
}
return new Response(JSON.stringify(servers), {
let donation
const response = servers.map(server => server.url)
return new Response(JSON.stringify(response), {
headers: { 'Content-Type': 'application/json' },
});
}