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Added avatars to make it a bit more friendly

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This commit is contained in:
Dani
2025-08-22 19:35:00 -04:00
parent 5dfc710ae9
commit 0bf00e3f00
7 changed files with 521 additions and 446 deletions
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627
client/app.js
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@@ -1,339 +1,352 @@
import { encryptString, decryptToString, toBlob } from "./crypto.js";
// ---------- DOM ----------
const els = {
shardUrl: document.getElementById("shardUrl"),
bearer: document.getElementById("bearer"),
passphrase: document.getElementById("passphrase"),
saveConn: document.getElementById("saveConn"),
keySignIn: document.getElementById("keySignIn"),
panicWipe: document.getElementById("panicWipe"),
health: document.getElementById("health"),
visibility: document.getElementById("visibility"),
title: document.getElementById("title"),
body: document.getElementById("body"),
publish: document.getElementById("publish"),
publishStatus: document.getElementById("publishStatus"),
posts: document.getElementById("posts"),
discordStart: document.getElementById("discordStart"),
};
const els = {};
function $(id){ return document.getElementById(id); }
// ---------- Config (no bearer in localStorage) ----------
const LS_KEY = "gc_client_config_v1";
const POSTS_KEY = "gc_posts_index_v1";
function loadConfig(){ try { return JSON.parse(localStorage.getItem(LS_KEY)) ?? {}; } catch { return {}; } }
function saveConfig(c){ localStorage.setItem(LS_KEY, JSON.stringify({ url: c.url, passphrase: c.passphrase })); Object.assign(cfg, c); }
function getPosts(){ try { return JSON.parse(localStorage.getItem(POSTS_KEY)) ?? []; } catch { return []; } }
function setPosts(v){ localStorage.setItem(POSTS_KEY, JSON.stringify(v)); renderPosts(); }
function norm(u){ return (u||"").replace(/\/+$/,""); }
function getBearer(){ return sessionStorage.getItem("gc_bearer") || ""; }
function setBearer(tok){ if (!tok) sessionStorage.removeItem("gc_bearer"); else sessionStorage.setItem("gc_bearer", tok); els.bearer.value = tok ? "••• (session)" : ""; }
const cfg = loadConfig();
// Bind after DOM is ready to avoid nulls
window.addEventListener("DOMContentLoaded", () => {
Object.assign(els, {
shardUrl: $("shardUrl"),
bearer: $("bearer"),
passphrase: $("passphrase"),
saveConn: $("saveConn"),
health: $("health"),
visibility: $("visibility"),
title: $("title"),
body: $("body"),
publish: $("publish"),
publishStatus: $("publishStatus"),
posts: $("posts"),
discordStart: $("discordStart"),
signIn: $("signIn"),
panic: $("panic"),
avatar: $("avatar"),
fp: $("fp"),
flash: $("flash"),
});
// ---------- Security helpers ----------
const enc = new TextEncoder();
const dec = new TextDecoder();
const b64 = (u) => { let s=""; u=new Uint8Array(u); for (let i=0;i<u.length;i++) s+=String.fromCharCode(u[i]); return btoa(s).replace(/\+/g,"-").replace(/\//g,"_").replace(/=+$/,""); };
const ub64 = (s) => { s=s.replace(/-/g,"+").replace(/_/g,"/"); while(s.length%4) s+="="; const bin=atob(s); const b=new Uint8Array(bin.length); for(let i=0;i<bin.length;i++) b[i]=bin.charCodeAt(i); return b.buffer; };
async function sha256Hex(buf){ const h = await crypto.subtle.digest("SHA-256", buf); return [...new Uint8Array(h)].map(x=>x.toString(16).padStart(2,"0")).join(""); }
// Wire handlers (with logging so you can see it fires)
on(els.saveConn, "click", onSaveConn);
on(els.publish, "click", publish);
on(els.discordStart, "click", discordStart);
on(els.signIn, "click", deviceKeySignIn);
on(els.panic, "click", panicWipe);
// Device key (P-256), stored locally (not a bearer)
async function getDevice() {
let dev = JSON.parse(localStorage.getItem('gc_device_key_v1')||'null');
if (!dev) {
const kp = await crypto.subtle.generateKey({name:"ECDSA", namedCurve:"P-256"}, true, ["sign","verify"]);
const pkcs8 = await crypto.subtle.exportKey("pkcs8", kp.privateKey);
const rawPub = await crypto.subtle.exportKey("raw", kp.publicKey); // 65B 0x04||X||Y
dev = { alg:"p256", priv: b64(pkcs8), pub: b64(rawPub) };
localStorage.setItem('gc_device_key_v1', JSON.stringify(dev));
}
return dev;
}
// Proof-of-Possession headers for this request
async function popHeaders(method, pathOnly, bodyBuf){
const dev = await getDevice();
const ts = Math.floor(Date.now()/1000).toString();
const hashHex = await sha256Hex(bodyBuf || new Uint8Array());
const msg = enc.encode(method.toUpperCase()+"\n"+pathOnly+"\n"+ts+"\n"+hashHex);
const priv = await crypto.subtle.importKey("pkcs8", ub64(dev.priv), { name:"ECDSA", namedCurve:"P-256" }, false, ["sign"]);
const sig = await crypto.subtle.sign({ name:"ECDSA", hash:"SHA-256" }, priv, msg);
return {
"X-GC-Key": "p256:"+dev.pub,
"X-GC-TS": ts,
"X-GC-Proof": b64(sig),
};
}
// Idle timeout → clear bearer
(function idleGuard(){
let idle;
const bump=()=>{ clearTimeout(idle); idle=setTimeout(()=>setBearer(""), 30*60*1000); }; // 30 min
["click","keydown","mousemove","touchstart","focus","visibilitychange"].forEach(ev=>addEventListener(ev,bump,{passive:true}));
bump();
})();
// ---------- API base detection ----------
function defaultApiBase() {
try {
const qs = new URLSearchParams(window.location.search);
const qApi = qs.get("api"); if (qApi) return qApi.replace(/\/+$/, "");
} catch {}
const m = document.querySelector('meta[name="gc-api-base"]');
if (m && m.content) return m.content.replace(/\/+$/, "");
try {
const u = new URL(window.location.href);
const proto = u.protocol, host = u.hostname, portStr = u.port;
const bracketHost = host.includes(":") ? `[${host}]` : host;
const port = portStr ? parseInt(portStr, 10) : null;
let apiPort = port;
if (port === 8082) apiPort = 8080;
else if (port === 9082) apiPort = 9080;
else if (port) apiPort = Math.max(1, port - 2);
return apiPort ? `${proto}//${bracketHost}:${apiPort}` : `${proto}//${bracketHost}`;
} catch {
return window.location.origin.replace(/\/+$/, "");
}
}
// ---------- App init ----------
function applyConfig(){
els.shardUrl.value = cfg.url ?? defaultApiBase();
els.passphrase.value = cfg.passphrase ?? "";
els.bearer.value = getBearer() ? "••• (session)" : "";
}
applyConfig(); checkHealth(); syncIndex(); sse();
// ---------- UI wiring ----------
els.saveConn.onclick = async () => {
const c = { url: norm(els.shardUrl.value), passphrase: els.passphrase.value };
saveConfig(c); await checkHealth(); await syncIndex(); sse(true);
};
els.publish.onclick = publish;
els.discordStart.onclick = discordStart;
els.keySignIn.onclick = keySignIn;
els.panicWipe.onclick = panicWipe;
// Panic wipe hotkey (double-tap ESC)
let escT=0;
addEventListener("keydown", (e) => {
if (e.key === "Escape") {
const now = Date.now();
if (now - escT < 600) panicWipe();
escT = now;
}
// Boot
applyConfig();
checkHealth();
syncIndex();
sse();
renderAvatar();
flash("GC client loaded");
});
// ---------- Health / Index / SSE ----------
async function checkHealth() {
if (!cfg.url) return; els.health.textContent = "Checking…";
// ---------- small helpers ----------
function on(el, ev, fn){ if (el) el.addEventListener(ev, (e)=>{ console.log(`[ui] ${ev}#${el.id}`); fn(e); }, false); }
function flash(msg, ms=1800){ if(!els.flash) return; els.flash.textContent=msg; els.flash.style.display="block"; setTimeout(()=>els.flash.style.display="none", ms); }
function norm(u){ return (u||"").replace(/\/+$/,""); }
function defaultApiBase() {
try { const qs = new URLSearchParams(window.location.search); const qApi = qs.get("api"); if (qApi) return qApi.replace(/\/+$/,""); } catch {}
const m = document.querySelector('meta[name="gc-api-base"]'); if (m && m.content) return m.content.replace(/\/+$/,"");
try {
const u = new URL(window.location.href); const proto = u.protocol; const host = u.hostname; const portStr = u.port; const bracketHost = host.includes(":") ? `[${host}]` : host;
const port = portStr ? parseInt(portStr,10) : null; let apiPort = port;
if (port === 8082) apiPort = 8080; else if (port === 9082) apiPort = 9080; else if (port) apiPort = Math.max(1, port-2);
return apiPort ? `${proto}//${bracketHost}:${apiPort}` : `${proto}//${bracketHost}`;
} catch { return window.location.origin.replace(/\/+$/,""); }
}
const LS_KEY = "gc_client_config_v4";
const POSTS_KEY = "gc_posts_index_v4";
const KEY_PKCS8 = "gc_key_pkcs8";
const KEY_PUB_RAW = "gc_key_pub_raw";
function loadConfig(){ try { return JSON.parse(localStorage.getItem(LS_KEY)) ?? {}; } catch { return {}; } }
const cfg = loadConfig();
function saveConfig(c){ localStorage.setItem(LS_KEY, JSON.stringify(Object.assign(cfg,c))); }
function applyConfig(){
if (!els.shardUrl) return;
els.shardUrl.value = cfg.url ?? defaultApiBase();
els.bearer.value = cfg.bearer ?? "";
els.passphrase.value = cfg.passphrase ?? "";
}
async function checkHealth(){
if (!cfg.url) { els.health.textContent="Set URL"; return; }
els.health.textContent="Checking…";
try { const r = await fetch(cfg.url + "/healthz"); els.health.textContent = r.ok ? "Connected ✔" : `Error: ${r.status}`; }
catch { els.health.textContent = "Not reachable"; }
}
async function syncIndex() {
if (!cfg.url) return;
try {
const hdrs = {};
const b = getBearer();
if (b) Object.assign(hdrs, await popHeaders("GET", "/v1/index", new Uint8Array()));
const r = await fetch(cfg.url + "/v1/index", { headers: Object.assign(hdrs, b?{Authorization:"Bearer "+b}:{}) });
if (!r.ok) throw new Error("index fetch failed");
const entries = await r.json();
setPosts(entries.map(e => ({ hash:e.hash, title:"(title unknown — fetch)", bytes:e.bytes, ts:e.stored_at, enc:e.private, tz:e.creator_tz||"" })));
} catch(e){ console.warn("index sync failed", e); }
}
function getPosts(){ try { return JSON.parse(localStorage.getItem(POSTS_KEY)) ?? []; } catch { return []; } }
function setPosts(v){ localStorage.setItem(POSTS_KEY, JSON.stringify(v)); renderPosts(); }
let sseCtrl;
function sse(reset){
if (!cfg.url) return;
if (sseCtrl) { sseCtrl.abort(); sseCtrl = undefined; }
sseCtrl = new AbortController();
const url = cfg.url + "/v1/index/stream";
const b = getBearer();
const start = async () => {
const hdrs = {};
if (b) Object.assign(hdrs, await popHeaders("GET", "/v1/index/stream", new Uint8Array()), { Authorization: "Bearer "+b });
fetch(url, { headers: hdrs, signal: sseCtrl.signal }).then(async resp => {
if (!resp.ok) return;
const reader = resp.body.getReader(); const decoder = new TextDecoder();
let buf = "";
while (true) {
const { value, done } = await reader.read(); if (done) break;
buf += decoder.decode(value, { stream:true });
let idx; while ((idx = buf.indexOf("\n\n")) >= 0) {
const chunk = buf.slice(0, idx); buf = buf.slice(idx+2);
if (chunk.startsWith("data: ")) {
try {
const ev = JSON.parse(chunk.slice(6));
if (ev.event === "put") {
const e = ev.data;
const posts = getPosts();
if (!posts.find(p => p.hash === e.hash)) {
posts.unshift({ hash:e.hash, title:"(title unknown — fetch)", bytes:e.bytes, ts:e.stored_at, enc:e.private, tz:e.creator_tz||"" });
setPosts(posts);
}
} else if (ev.event === "delete") {
const h = ev.data.hash; setPosts(getPosts().filter(p => p.hash !== h));
}
} catch {}
}
}
// ---------- avatar (canvas PNG, onerror-safe) ----------
function b64uEncode(buf){ const bin = Array.from(new Uint8Array(buf)).map(b=>String.fromCharCode(b)).join(""); return btoa(bin).replace(/\+/g,"-").replace(/\//g,"_").replace(/=+$/,""); }
function b64uDecodeToBytes(s){ s=s.replace(/-/g,"+").replace(/_/g,"/"); while(s.length%4) s+="="; const bin=atob(s); const out=new Uint8Array(bin.length); for(let i=0;i<bin.length;i++) out[i]=bin.charCodeAt(i); return out; }
function b64urlToJSON(b){ return JSON.parse(new TextDecoder().decode(b64uDecodeToBytes(b))); }
function parseGC2(tok){ try{ const p=tok.split("."); if(p.length!==3) return {}; const pl=b64urlToJSON(p[1]); return {sub:pl.sub||"", cnf:pl.cnf||""}; }catch{ return {}; } }
async function sha256Hex(str){ const out = await crypto.subtle.digest("SHA-256", new TextEncoder().encode(str)); return Array.from(new Uint8Array(out)).map(b=>b.toString(16).padStart(2,"0")).join(""); }
function hexBytes(hex){ const u=new Uint8Array(hex.length/2); for(let i=0;i<u.length;i++) u[i]=parseInt(hex.substr(i*2,2),16); return u; }
function identiconPNG(hex, size=64){
const cells=5, cell=Math.floor(size/cells), pad=Math.floor((size-cell*cells)/2);
const b=hexBytes(hex); const hue=b[0]/255*360; const bg=`hsl(${hue},35%,16%)`; const fg=`hsl(${(hue+180)%360},70%,60%)`;
const bits=[]; for(const x of b) for(let i=0;i<8;i++) bits.push((x>>i)&1);
const c=document.createElement("canvas"); c.width=c.height=size; const g=c.getContext("2d");
g.fillStyle=bg; g.fillRect(0,0,size,size);
let k=0;
for(let y=0;y<cells;y++){
for(let x=0;x<3;x++){
if(bits[k++]===1){
const px=pad+x*cell, py=pad+y*cell;
g.fillStyle=fg; g.fillRect(px,py,cell-1,cell-1);
const mx=pad+(cells-1-x)*cell;
if(cells-1-x!==x) g.fillRect(mx,py,cell-1,cell-1);
}
}).catch(()=>{});
};
start();
}
}
return c.toDataURL("image/png");
}
// ---------- Auth ----------
async function keySignIn(){
try {
if (!cfg.url) { alert("Set shard URL first."); return; }
// 1) challenge
const cResp = await fetch(cfg.url + "/v1/auth/key/challenge", { method:"POST" });
const cTxt = await cResp.text();
if (!cResp.ok) { alert("Challenge failed: " + cTxt); return; }
const c = JSON.parse(cTxt);
// 2) sign and verify
const dev = await getDevice();
const priv = await crypto.subtle.importKey("pkcs8", ub64(dev.priv), { name:"ECDSA", namedCurve:"P-256" }, false, ["sign"]);
const msg = enc.encode("key-verify\n" + c.nonce);
const sig = await crypto.subtle.sign({ name:"ECDSA", hash:"SHA-256" }, priv, msg);
const vResp = await fetch(cfg.url + "/v1/auth/key/verify", {
method:"POST",
headers: { "Content-Type":"application/json" },
body: JSON.stringify({ nonce:c.nonce, alg:"p256", pub: dev.pub, sig: b64(sig) })
});
const vTxt = await vResp.text();
if (!vResp.ok) { alert("Verify failed: " + vTxt); return; }
const j = JSON.parse(vTxt);
setBearer(j.bearer);
alert("Signed in ✔ (session)");
await syncIndex();
} catch (e) {
alert("Key sign-in exception: " + (e?.message || e));
}
async function renderAvatar(){
if (!els.avatar) return;
let seed=null, label="(pseudonymous)";
if (cfg.bearer){ const p=parseGC2(cfg.bearer); seed=p.cnf||p.sub||null; if(p.sub) label=p.sub; }
if (!seed){ els.avatar.removeAttribute("src"); if (els.fp) els.fp.textContent="(pseudonymous)"; return; }
const hex=await sha256Hex(seed);
const url=identiconPNG(hex, 64);
els.avatar.onerror = ()=>{ els.avatar.removeAttribute("src"); if (els.fp) els.fp.textContent="(pseudonymous)"; };
els.avatar.src=url;
if (els.fp) els.fp.textContent=label+" (pseudonymous)";
}
// ---------- UI handlers ----------
async function onSaveConn(){
const c = {
url: norm(els.shardUrl.value || defaultApiBase()),
bearer: els.bearer.value.trim(),
passphrase: els.passphrase.value,
};
saveConfig(c);
flash("Saved");
await checkHealth();
await syncIndex();
sse(true);
await renderAvatar();
}
async function panicWipe(){
try {
if (cfg.url) await fetch(cfg.url + "/v1/session/clear", { method:"POST" });
} catch {}
sessionStorage.clear();
localStorage.clear();
caches && caches.keys().then(keys => keys.forEach(k => caches.delete(k)));
location.replace("about:blank");
flash("Wiping local state…");
try { if (cfg.url) await fetch(cfg.url + "/v1/session/clear", { method:"POST" }); } catch {}
localStorage.clear(); sessionStorage.clear(); caches?.keys?.().then(keys => keys.forEach(k => caches.delete(k)));
flash("Cleared — reloading"); setTimeout(()=>location.reload(), 300);
}
// ---------- Publishing / Viewing ----------
function msg(t, err=false){ els.publishStatus.textContent=t; els.publishStatus.style.color = err ? "#ff6b6b" : "inherit"; }
async function publish() {
if (!cfg.url) return msg("Set shard URL first.", true);
const b = getBearer(); if (!b) return msg("Sign in first (device key).", true);
const title = els.title.value.trim();
const body = els.body.value;
const vis = els.visibility.value;
try {
let blob, encp=false;
if (vis === "private") {
if (!cfg.passphrase) return msg("Set a passphrase for private posts.", true);
const payload = await encryptString(JSON.stringify({ title, body }), cfg.passphrase);
blob = toBlob(payload); encp=true;
} else {
blob = toBlob(JSON.stringify({ title, body }));
}
const buf = new Uint8Array(await blob.arrayBuffer());
const path = "/v1/object";
const headers = { "Content-Type":"application/octet-stream", Authorization: "Bearer "+b };
if (encp) headers["X-GC-Private"] = "1";
const pop = await popHeaders("PUT", path, buf);
Object.assign(headers, pop);
const r = await fetch(cfg.url + path, { method:"PUT", headers, body: buf });
if (!r.ok) throw new Error(await r.text());
const j = await r.json();
const posts = getPosts();
posts.unshift({ hash:j.hash, title: title || "(untitled)", bytes:j.bytes, ts:j.stored_at, enc:j.private, tz:j.creator_tz||"" });
setPosts(posts);
els.body.value = ""; msg(`Published ${encp?"private":"public"} post. Hash: ${j.hash}`);
} catch(e){ msg("Publish failed: " + (e?.message||e), true); }
}
async function viewPost(p, pre) {
pre.textContent = "Loading…";
try {
const path = "/v1/object/" + p.hash;
const headers = {};
const b = getBearer();
if (b) Object.assign(headers, await popHeaders("GET", path, new Uint8Array()), { Authorization: "Bearer "+b });
const r = await fetch(cfg.url + path, { headers });
if (!r.ok) throw new Error("fetch failed " + r.status);
const buf = new Uint8Array(await r.arrayBuffer());
let text;
if (p.enc) {
if (!cfg.passphrase) throw new Error("passphrase required");
text = await decryptToString(buf, cfg.passphrase);
} else { text = new TextDecoder().decode(buf); }
try {
const j = JSON.parse(text);
pre.textContent = (j.title ? `# ${j.title}\n\n` : "") + (j.body ?? text);
} catch { pre.textContent = text; }
} catch (e) { pre.textContent = "Error: " + (e?.message || e); }
}
async function saveBlob(p) {
const path = "/v1/object/" + p.hash;
const headers = {};
const b = getBearer();
if (b) Object.assign(headers, await popHeaders("GET", path, new Uint8Array()), { Authorization: "Bearer "+b });
const r = await fetch(cfg.url + path, { headers });
if (!r.ok) return alert("download failed " + r.status);
const bl = await r.blob();
const a = document.createElement("a"); a.href = URL.createObjectURL(bl);
a.download = p.hash + (p.enc ? ".gcenc" : ".json"); a.click(); URL.revokeObjectURL(a.href);
}
async function delServer(p) {
const path = "/v1/object/" + p.hash;
const b = getBearer(); if (!b) return alert("Sign in first.");
const headers = { Authorization: "Bearer "+b };
Object.assign(headers, await popHeaders("DELETE", path, new Uint8Array()));
if (!confirm("Delete blob from server by hash?")) return;
const r = await fetch(cfg.url + path, { method:"DELETE", headers });
if (!r.ok) return alert("delete failed " + r.status);
setPosts(getPosts().filter(x=>x.hash!==p.hash));
}
// ---------- Discord SSO ----------
async function discordStart() {
if (!cfg.url) { alert("Set shard URL first."); return; }
async function discordStart(){
if (!cfg.url){ alert("Set shard URL first."); return; }
flash("Starting Discord…");
const r = await fetch(cfg.url + "/v1/auth/discord/start", { headers: { "X-GC-3P-Assent":"1" }});
if (!r.ok) { alert("Discord SSO not available"); return; }
if (!r.ok){ alert("Discord SSO not available"); return; }
const j = await r.json();
location.href = j.url;
}
// ---------- Render ----------
function renderPosts() {
const posts = getPosts(); els.posts.innerHTML = "";
for (const p of posts) {
const div = document.createElement("div"); div.className = "post";
const badge = p.enc ? `<span class="badge">private</span>` : `<span class="badge">public</span>`;
// ---------- device-key sign-in & PoP ----------
async function getOrCreateKeyPair(){
const pkcs8 = sessionStorage.getItem(KEY_PKCS8);
const pubRaw = sessionStorage.getItem(KEY_PUB_RAW);
if (pkcs8 && pubRaw){
try{
const priv = await crypto.subtle.importKey("pkcs8", b64uDecodeToBytes(pkcs8), {name:"ECDSA", namedCurve:"P-256"}, true, ["sign"]);
const pub = await crypto.subtle.importKey("raw", b64uDecodeToBytes(pubRaw), {name:"ECDSA", namedCurve:"P-256"}, true, ["verify"]);
return { priv, pub, pubRawB64u: pubRaw };
}catch{}
}
const kp = await crypto.subtle.generateKey({name:"ECDSA", namedCurve:"P-256"}, true, ["sign","verify"]);
const pkcs8New = await crypto.subtle.exportKey("pkcs8", kp.privateKey);
const pubRawBytes = await crypto.subtle.exportKey("raw", kp.publicKey);
const pkcs8B64 = b64uEncode(pkcs8New);
const pubRawB64 = b64uEncode(pubRawBytes);
sessionStorage.setItem(KEY_PKCS8, pkcs8B64);
sessionStorage.setItem(KEY_PUB_RAW, pubRawB64);
return { priv: kp.privateKey, pub: kp.publicKey, pubRawB64u: pubRawB64 };
}
async function deviceKeySignIn(){
if (!cfg.url){ alert("Set shard URL first."); return; }
flash("Signing in…");
try{
const { priv, pubRawB64u } = await getOrCreateKeyPair();
const rc = await fetch(cfg.url + "/v1/auth/key/challenge", { method:"POST" });
if (!rc.ok) throw new Error("challenge "+rc.status);
const cj = await rc.json();
const msg = new TextEncoder().encode("key-verify\n"+cj.nonce);
const sig = await crypto.subtle.sign({name:"ECDSA", hash:"SHA-256"}, priv, msg); // DER
const body = JSON.stringify({ nonce:cj.nonce, alg:"p256", pub:pubRawB64u, sig:b64uEncode(sig) });
const rv = await fetch(cfg.url + "/v1/auth/key/verify", { method:"POST", headers:{"Content-Type":"application/json"}, body });
if (!rv.ok) throw new Error("verify "+rv.status);
const vj = await rv.json();
saveConfig({ bearer: vj.bearer, url: cfg.url, passphrase: cfg.passphrase });
applyConfig(); await renderAvatar(); await checkHealth(); await syncIndex(); sse(true);
flash("Signed in");
}catch(e){
console.error(e);
alert("Sign-in error: "+(e?.message||e));
}
}
async function signPoPHeaders(method, pathOnly, bodyBytes){
const pubRaw = sessionStorage.getItem(KEY_PUB_RAW);
const pkcs8 = sessionStorage.getItem(KEY_PKCS8);
if (!pubRaw || !pkcs8) return {};
const priv = await crypto.subtle.importKey("pkcs8", b64uDecodeToBytes(pkcs8), {name:"ECDSA", namedCurve:"P-256"}, false, ["sign"]);
const bodyHash = await crypto.subtle.digest("SHA-256", bodyBytes || new Uint8Array());
const hex = Array.from(new Uint8Array(bodyHash)).map(b=>b.toString(16).padStart(2,"0")).join("");
const ts = Math.floor(Date.now()/1000).toString();
const msg = new TextEncoder().encode(method.toUpperCase()+"\n"+pathOnly+"\n"+ts+"\n"+hex);
const sig = await crypto.subtle.sign({name:"ECDSA", hash:"SHA-256"}, priv, msg);
return { "X-GC-Key":"p256:"+pubRaw, "X-GC-TS":ts, "X-GC-Proof":b64uEncode(sig) };
}
async function fetchWithPoP(url, opts){
const u = new URL(url); const path = u.pathname; const method = (opts?.method||"GET").toUpperCase();
const bodyBuf = opts?.body instanceof Blob ? new Uint8Array(await opts.body.arrayBuffer())
: (opts?.body instanceof ArrayBuffer ? new Uint8Array(opts.body) : new Uint8Array());
const pop = await signPoPHeaders(method, path, bodyBuf);
const headers = new Headers(opts?.headers||{});
if (cfg.bearer) headers.set("Authorization", "Bearer "+cfg.bearer);
for (const [k,v] of Object.entries(pop)) headers.set(k,v);
return fetch(url, { ...(opts||{}), headers });
}
// ---------- posts ----------
function msg(t, err=false){ els.publishStatus.textContent=t; els.publishStatus.style.color = err ? "#ff6b6b" : "#8b949e"; }
async function publish(){
if (!cfg.url) return msg("Set shard URL first.", true);
const title = els.title.value.trim(); const body = els.body.value; const vis = els.visibility.value;
try{
let blob, enc=false;
if (vis==="private"){
if (!els.passphrase.value) return msg("Set a passphrase for private posts.", true);
const payload = await encryptString(JSON.stringify({title,body}), els.passphrase.value);
blob = toBlob(payload); enc=true;
} else {
blob = toBlob(JSON.stringify({title,body}));
}
const headers = {"Content-Type":"application/octet-stream"};
if (enc) headers["X-GC-Private"]="1";
const tz = Intl.DateTimeFormat().resolvedOptions().timeZone; if (tz) headers["X-GC-TZ"]=tz;
const r = await fetchWithPoP((cfg.url||defaultApiBase()) + "/v1/object", { method:"PUT", headers, body: blob });
if (!r.ok) throw new Error(await r.text());
const j = await r.json();
const posts = getPosts();
posts.unshift({ hash:j.hash, title: title || "(untitled)", bytes:j.bytes, ts:j.stored_at, enc, author:j.author||null, tz:j.creator_tz||null });
setPosts(posts);
els.body.value=""; msg(`Published ${enc?"private":"public"} post. Hash: ${j.hash}`);
}catch(e){ msg("Publish failed: "+(e?.message||e), true); }
}
async function syncIndex(){
if (!cfg.url) return;
try{
const r = await fetch(cfg.url + "/v1/index");
if (!r.ok) throw new Error("index fetch failed");
const entries = await r.json();
setPosts(entries.map(e=>({hash:e.hash, title:"(title unknown — fetch)", bytes:e.bytes, ts:e.stored_at, enc:e.private, author:e.author||null, tz:e.creator_tz||null})));
}catch(e){ console.warn("index sync failed", e); }
}
let sseCtrl;
function sse(reset=false){
if (!cfg.url) return;
if (sseCtrl){ sseCtrl.abort(); sseCtrl=undefined; if(!reset) return; }
sseCtrl = new AbortController();
fetch(cfg.url + "/v1/index/stream", { signal:sseCtrl.signal }).then(async resp=>{
if (!resp.ok) return;
const reader = resp.body.getReader(); const dec = new TextDecoder(); let buf="";
while(true){ const {value,done}=await reader.read(); if(done) break;
buf += dec.decode(value,{stream:true});
let i; while((i=buf.indexOf("\n\n"))>=0){
const chunk=buf.slice(0,i); buf=buf.slice(i+2);
if (chunk.startsWith("data: ")){
try{
const ev = JSON.parse(chunk.slice(6));
if (ev.event==="put"){
const e=ev.data; const posts=getPosts();
if (!posts.find(p=>p.hash===e.hash)){
posts.unshift({hash:e.hash,title:"(title unknown — fetch)",bytes:e.bytes,ts:e.stored_at,enc:e.private,author:e.author||null,tz:e.creator_tz||null});
setPosts(posts);
}
} else if (ev.event==="delete"){
const h=ev.data.hash; setPosts(getPosts().filter(x=>x.hash!==h));
}
}catch{}
}
}
}
}).catch(()=>{});
}
async function viewPost(p, pre){
pre.textContent="Loading…";
try{
const r = await fetch((cfg.url||defaultApiBase()) + "/v1/object/"+p.hash);
if (!r.ok) throw new Error("fetch failed "+r.status);
const buf = new Uint8Array(await r.arrayBuffer());
let text;
if (p.enc){
if (!els.passphrase.value) throw new Error("passphrase required");
text = await decryptToString(buf, els.passphrase.value);
} else { text = new TextDecoder().decode(buf); }
try{ const j=JSON.parse(text); pre.textContent=(j.title?`# ${j.title}\n\n`:"")+(j.body??text); }
catch{ pre.textContent=text; }
}catch(e){ pre.textContent="Error: "+(e?.message||e); }
}
async function saveBlob(p){
const r = await fetch((cfg.url||defaultApiBase()) + "/v1/object/"+p.hash);
if (!r.ok) return alert("download failed "+r.status);
const b = await r.blob(); const a=document.createElement("a"); a.href=URL.createObjectURL(b);
a.download=p.hash+(p.enc?".gcenc":".json"); a.click(); URL.revokeObjectURL(a.href);
}
async function delServer(p){
if (!confirm("Delete blob from server by hash?")) return;
const r = await fetchWithPoP((cfg.url||defaultApiBase()) + "/v1/object/"+p.hash, { method:"DELETE" });
if (!r.ok) return alert("delete failed "+r.status);
setPosts(getPosts().filter(x=>x.hash!==p.hash));
}
function renderPosts(){
const posts = getPosts(); if (!els.posts) return; els.posts.innerHTML="";
for (const p of posts){
const div = document.createElement("div"); div.className="post";
const badge = p.enc?`<span class="badge">private</span>`:`<span class="badge">public</span>`;
const tz = p.tz?` · tz:${p.tz}`:""; const who = p.author?` · by ${p.author.slice(0,8)}…`:"";
div.innerHTML = `
<div class="meta"><code>${p.hash.slice(0,10)}…</code> · ${p.bytes} bytes · ${p.ts} ${badge}</div>
<div class="meta"><code>${p.hash.slice(0,10)}…</code> · ${p.bytes} bytes · ${p.ts}${tz}${who} ${badge}</div>
<div class="actions">
<button data-act="view">View</button>
<button data-act="save">Save blob</button>
<button data-act="delete">Delete (server)</button>
<button data-act="remove">Remove (local)</button>
<button data-act="view" type="button">View</button>
<button data-act="save" type="button">Save blob</button>
<button data-act="delete" type="button">Delete (server)</button>
<button data-act="remove" type="button">Remove (local)</button>
</div>
<pre class="content"></pre>`;
<pre class="content" style="white-space:pre-wrap;margin-top:.5rem;"></pre>`;
const pre = div.querySelector(".content");
div.querySelector('[data-act="view"]').onclick = () => viewPost(p, pre);
div.querySelector('[data-act="save"]').onclick = () => saveBlob(p);
div.querySelector('[data-act="delete"]').onclick = () => delServer(p);
div.querySelector('[data-act="remove"]').onclick = () => { setPosts(getPosts().filter(x=>x.hash!==p.hash)); };
div.querySelector('[data-act="view"]').onclick = ()=>viewPost(p, pre);
div.querySelector('[data-act="save"]').onclick = ()=>saveBlob(p);
div.querySelector('[data-act="delete"]').onclick = ()=>delServer(p);
div.querySelector('[data-act="remove"]').onclick = ()=>{ setPosts(getPosts().filter(x=>x.hash!==p.hash)); };
els.posts.appendChild(div);
}
}

44
client/avatar.js Normal file
View File

@@ -0,0 +1,44 @@
// Deterministic, local-only avatars. No network calls.
export function avatarDataURL(seed, size = 40) {
// Hash seed → bytes
const h = sha256(seed);
// Colors from bytes
const hue = h[0] % 360;
const bg = `hsl(${(h[1]*3)%360} 25% 14%)`;
const fg = `hsl(${hue} 70% 60%)`;
// 5x5 grid mirrored; draw squares where bits set
const cells = 5, scale = Math.floor(size / cells);
let rects = "";
for (let y = 0; y < cells; y++) {
for (let x = 0; x < Math.ceil(cells/2); x++) {
const bit = (h[(y*3 + x) % h.length] >> (y % 5)) & 1;
if (bit) {
const xL = x*scale, xR = (cells-1-x)*scale, yP = y*scale;
rects += `<rect x="${xL}" y="${yP}" width="${scale}" height="${scale}" rx="2" ry="2" fill="${fg}"/>`;
if (x !== cells-1-x) {
rects += `<rect x="${xR}" y="${yP}" width="${scale}" height="${scale}" rx="2" ry="2" fill="${fg}"/>`;
}
}
}
}
const svg = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 ${cells*scale} ${cells*scale}">
<rect width="100%" height="100%" fill="${bg}"/>${rects}
</svg>`;
return "data:image/svg+xml;base64," + btoa(unescape(encodeURIComponent(svg)));
}
function sha256(s) {
// Simple synchronous hash-ish bytes from string (non-cryptographic; fine for visuals)
let h1 = 0x6a09e667, h2 = 0xbb67ae85;
for (let i=0;i<s.length;i++) {
const c = s.charCodeAt(i);
h1 = (h1 ^ c) * 0x45d9f3b + ((h1<<7) | (h1>>>25));
h2 = (h2 ^ (c<<1)) * 0x27d4eb2d + ((h2<<9) | (h2>>>23));
}
const out = new Uint8Array(32);
for (let i=0;i<32;i++){
out[i] = (h1 >> (i%24)) ^ (h2 >> ((i*3)%24)) ^ (i*31);
}
return out;
}

66
client/index.html
View File

@@ -5,42 +5,54 @@
<title>GreenCoast — Client</title>
<meta name="viewport" content="width=device-width,initial-scale=1"/>
<link rel="stylesheet" href="./styles.css"/>
<!-- Optional: explicit API base -->
<meta name="gc-api-base" content="https://api-gc.fullmooncyberworks.com">
<!-- Optional: set your API base explicitly -->
<!-- <meta name="gc-api-base" content="https://api-gc.fullmooncyberworks.com"> -->
<style>
#flash{position:fixed;right:12px;bottom:12px;background:#0b1222;border:1px solid #1f2937;color:#e5e7eb;
padding:.55rem .7rem;border-radius:.5rem;box-shadow:0 6px 18px rgba(0,0,0,.35);display:none;z-index:9999}
</style>
</head>
<body>
<div class="container">
<h1>GreenCoast (Client)</h1>
<header class="topbar">
<div class="brand">GreenCoast</div>
<div class="actions">
<button id="signIn" type="button">Sign in (device key)</button>
<button id="discordStart" type="button">Discord</button>
<button id="panic" type="button">Panic wipe</button>
</div>
</header>
<div class="container">
<section class="card">
<h2>Connect</h2>
<h2>Connection</h2>
<div class="row">
<label>Shard URL</label>
<input id="shardUrl" placeholder="https://api-gc.fullmooncyberworks.com" />
<input id="shardUrl" placeholder="https://api-gc.fullmooncyberworks.com"/>
</div>
<div class="row">
<label>Bearer (session)</label>
<input id="bearer" placeholder="(auto after sign-in)" disabled />
<label>Bearer</label>
<input id="bearer" placeholder="gc2 token"/>
</div>
<div class="row">
<label>Passphrase (private posts)</label>
<input id="passphrase" type="password" placeholder="••••••••" />
<label>Passphrase</label>
<input id="passphrase" type="password" placeholder="••••••••"/>
</div>
<div class="row">
<label>3rd-party SSO</label>
<div>
<button id="discordStart">Sign in with Discord</button>
<div class="muted" id="ssoNote">
We use external providers only if you choose to. We cannot vouch for their security.
</div>
<button id="saveConn" type="button">Save</button>
<div id="health" class="muted"></div>
<p class="muted">
We do not store PII or logs. Third-party SSO is optional and not endorsed for security.
</p>
</section>
<section class="card">
<h2>Your profile</h2>
<div class="profile">
<img id="avatar" alt="avatar" width="64" height="64"/>
<div class="profile-meta">
<div><code id="fp">(pseudonymous)</code></div>
<div class="muted">Avatar is derived locally from your device key.</div>
</div>
</div>
<div class="actions">
<button id="saveConn">Save</button>
<button id="keySignIn">Sign in (device key)</button>
<button id="panicWipe" class="danger">Panic wipe</button>
</div>
<div id="health" class="muted"></div>
</section>
<section class="card">
@@ -48,8 +60,8 @@
<div class="row">
<label>Visibility</label>
<select id="visibility">
<option value="private">Private (E2EE via passphrase)</option>
<option value="public">Public (plaintext)</option>
<option value="private">Private (E2EE via passphrase)</option>
</select>
</div>
<div class="row">
@@ -60,9 +72,7 @@
<label>Body</label>
<textarea id="body" rows="6" placeholder="Write your post..."></textarea>
</div>
<div class="actions">
<button id="publish">Publish</button>
</div>
<button id="publish" type="button">Publish</button>
<div id="publishStatus" class="muted"></div>
</section>
@@ -72,6 +82,8 @@
</section>
</div>
<div id="flash"></div>
<script type="module" src="./app.js"></script>
</body>
</html>

34
client/styles.css
View File

@@ -1,15 +1,19 @@
:root { color-scheme: light dark; }
body { font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Noto Sans", sans-serif; margin: 0; padding: 2rem; }
.container { max-width: 860px; margin: 0 auto; }
h1 { margin: 0 0 1rem 0; }
.card { border: 1px solid #30363d; border-radius: 16px; padding: 1rem; margin: 1rem 0; box-shadow: 0 2px 6px rgba(0,0,0,.1); }
.row { display: grid; grid-template-columns: 160px 1fr; gap: .8rem; align-items: center; margin: .6rem 0; }
label { opacity: .8; }
input, textarea, select, button { font: inherit; padding: .6rem .7rem; border-radius: 10px; border: 1px solid #30363d; background: transparent; color: inherit; }
button { cursor: pointer; }
button.danger { border-color: #a4002a; color: #a4002a; }
.actions { display: flex; gap: .6rem; flex-wrap: wrap; margin-top: .4rem; }
.muted { opacity: .7; font-size: .9rem; }
.badge { display: inline-block; padding: .1rem .4rem; border-radius: 8px; border: 1px solid #30363d; font-size: .75rem; margin-left: .4rem; }
.post { border-top: 1px dashed #30363d; padding: .6rem 0; }
pre.content { white-space: pre-wrap; margin-top: .5rem; }
:root{--bg:#0f172a;--surface:#111827;--muted:#8b949e;--text:#e5e7eb;--accent:#22c55e;--card:#0b1222;--border:#1f2937}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,Segoe UI,Roboto,Ubuntu,"Helvetica Neue","Noto Sans",Arial,"Apple Color Emoji","Segoe UI Emoji"}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1rem;border-bottom:1px solid var(--border);background:#0b1222;position:sticky;top:0;z-index:10}
.topbar .brand{font-weight:700}
.topbar .actions button{margin-left:.5rem}
.container{max-width:980px;margin:1rem auto;padding:0 1rem}
.card{background:var(--card);border:1px solid var(--border);border-radius:.75rem;padding:1rem;margin-bottom:1rem}
.row{display:flex;gap:.75rem;align-items:center;margin:.5rem 0}
.row label{min-width:140px;color:#cbd5e1}
.row input, .row select, textarea{flex:1;background:#0f172a;border:1px solid var(--border);border-radius:.5rem;padding:.6rem .7rem;color:var(--text)}
button{background:#134e4a;border:1px solid #0f766e;color:white;border-radius:.6rem;padding:.5rem .75rem;cursor:pointer}
button:hover{filter:brightness(1.05)}
.muted{color:var(--muted)}
.profile{display:flex;align-items:center;gap:1rem}
#avatar{border-radius:50%;border:1px solid var(--border);background:#0f172a;image-rendering:pixelated}
.post{border:1px dashed var(--border);border-radius:.5rem;padding:.6rem .7rem;margin-bottom:.6rem}
.post .meta{color:var(--muted);font-size:.9rem;margin-bottom:.25rem}
.badge{background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:.05rem .5rem;font-size:.75rem;margin-left:.5rem}

66
internal/api/http.go
View File

@@ -14,6 +14,7 @@ import (
"io"
"log"
"math/big"
"net"
"net/http"
"os"
"sort"
@@ -115,8 +116,8 @@ func (s *Server) routes() *http.ServeMux {
mux.HandleFunc("/v1/auth/key/verify", s.handleAuthKeyVerify)
// Objects
mux.HandleFunc("/v1/object", s.handlePutObject) // PUT (requires bearer+PoP)
mux.HandleFunc("/v1/object/", s.handleObjectByHash) // GET/DELETE (DELETE requires bearer+PoP)
mux.HandleFunc("/v1/object", s.handlePutObject) // PUT
mux.HandleFunc("/v1/object/", s.handleObjectByHash) // GET/DELETE
// Index
mux.HandleFunc("/v1/index", s.handleIndexList)
@@ -128,7 +129,7 @@ func (s *Server) routes() *http.ServeMux {
// GDPR
mux.HandleFunc("/v1/gdpr/policy", s.handleGDPRPolicy)
// Session panic wipe (no auth; clears browser caches)
// Panic wipe signal (client clears itself)
mux.HandleFunc("/v1/session/clear", s.handleSessionClear)
return mux
@@ -149,7 +150,7 @@ func (s *Server) cors(next http.Handler) http.Handler {
w.Header().Set("X-Content-Type-Options", "nosniff")
w.Header().Set("Strict-Transport-Security", "max-age=15552000; includeSubDomains; preload")
// Preflight is free (don’t rate-limit OPTIONS)
// Preflight is free
if r.Method == http.MethodOptions {
w.WriteHeader(http.StatusNoContent)
return
@@ -175,15 +176,6 @@ func (s *Server) cors(next http.Handler) http.Handler {
})
}
func (s *Server) handleSessionClear(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodPost {
http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
return
}
w.Header().Set("Clear-Site-Data", `"cache","storage"`)
w.WriteHeader(http.StatusNoContent)
}
// ---------- Helpers ----------
func b64u(b []byte) string {
@@ -197,7 +189,7 @@ func b64ud(s string) ([]byte, error) {
}
func nowUTC() time.Time { return time.Now().UTC() }
// Admin allow-list: env GC_ADMIN_SUBS="sub1,sub2"
// Admin allow-list: env GC_ADMIN_SUBS="sub1,sub2" (subs are thumbprints)
func (s *Server) isAdmin(ac authContext) bool {
raw := strings.TrimSpace(os.Getenv("GC_ADMIN_SUBS"))
if raw == "" || ac.CNF == "" {
@@ -212,6 +204,19 @@ func (s *Server) isAdmin(ac authContext) bool {
return false
}
func clientIP(r *http.Request) string {
xff := r.Header.Get("X-Forwarded-For")
if xff != "" {
parts := strings.Split(xff, ",")
return strings.TrimSpace(parts[0])
}
host, _, err := net.SplitHostPort(r.RemoteAddr)
if err == nil {
return host
}
return r.RemoteAddr
}
// ---------- Health ----------
func (s *Server) handleHealth(w http.ResponseWriter, r *http.Request) {
@@ -230,7 +235,7 @@ func (s *Server) handleAuthKeyChallenge(w http.ResponseWriter, r *http.Request)
http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
return
}
// Nonce (32B hex) valid 5 minutes
// Nonce valid 5 minutes
sum := sha256.Sum256([]byte(fmt.Sprintf("%d:%d", time.Now().UnixNano(), time.Now().Unix())))
nonce := hex.EncodeToString(sum[:])
exp := nowUTC().Add(5 * time.Minute)
@@ -371,7 +376,7 @@ func parseECDSADER(der []byte) (*big.Int, *big.Int, bool) {
seqLen = int(der[i])
i++
}
_ = seqLen // not strictly needed
_ = seqLen
// INTEGER R
if i >= len(der) || der[i] != 0x02 {
@@ -536,7 +541,7 @@ func (s *Server) verifyPoP(w http.ResponseWriter, r *http.Request, ac authContex
http.Error(w, "ts window", http.StatusUnauthorized)
return false
}
// Replay cache
// Replay cache cleanup + check
s.rpMu.Lock()
for k, v := range s.replay {
if nowUTC().After(v) {
@@ -635,6 +640,12 @@ func (s *Server) handlePutObject(w http.ResponseWriter, r *http.Request) {
Private: isPrivate,
CreatorTZ: creatorTZ,
}
// Optional author fingerprint for avatars (pseudonymous).
// Disable by setting GC_SUPPRESS_AUTHOR=1
if os.Getenv("GC_SUPPRESS_AUTHOR") != "1" && ac.CNF != "" {
ent.Author = thumbprintFromCNF(ac.CNF)
}
if err := s.idx.Put(ent); err != nil {
http.Error(w, "index error", http.StatusInternalServerError)
return
@@ -667,6 +678,7 @@ func (s *Server) handleObjectByHash(w http.ResponseWriter, r *http.Request) {
defer rc.Close()
w.Header().Set("Content-Type", "application/octet-stream")
w.Header().Set("Content-Length", fmt.Sprintf("%d", size))
w.Header().Set("Content-Disposition", "attachment; filename="+hash)
_, _ = io.Copy(w, rc)
case http.MethodDelete:
@@ -777,22 +789,21 @@ func (s *Server) handleAdminReindex(w http.ResponseWriter, r *http.Request) {
}
var walked, indexed int64
err := s.store.Walk(func(hash string, size int64, mod time.Time) error {
walked++
ent := index.Entry{
Hash: hash,
Bytes: size,
StoredAt: mod.UTC().Format(time.RFC3339Nano),
Private: false,
}
if err := s.idx.Put(ent); err == nil {
indexed++
}
walked++
return nil
return s.idx.Put(ent)
})
if err != nil {
http.Error(w, "walk error", http.StatusInternalServerError)
return
}
ents := s.idx.All()
indexed = int64(len(ents))
w.Header().Set("Content-Type", "application/json; charset=utf-8")
_ = json.NewEncoder(w).Encode(map[string]any{
"walked": walked,
@@ -834,3 +845,14 @@ func (s *Server) handleGDPRPolicy(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
_ = json.NewEncoder(w).Encode(p)
}
// ---------- Session clear ----------
func (s *Server) handleSessionClear(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodPost {
http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
return
}
w.Header().Set("Clear-Site-Data", `"cache","storage"`)
w.WriteHeader(http.StatusNoContent)
}

88
internal/api/ratelimit.go
View File

@@ -1,31 +1,33 @@
package api
import (
"net"
"net/http"
"sync"
"time"
)
// Simple token-bucket rate limiter used by Server.cors middleware.
type tokenBucket struct {
tokens float64
lastFill time.Time
}
type rateLimiter struct {
mu sync.Mutex
bk map[string]*bucket
rate float64 // tokens per second
burst float64
window time.Duration
rate float64 // tokens per second
burst float64
mu sync.Mutex
bk map[string]*tokenBucket
evictDur time.Duration
lastGC time.Time
}
type bucket struct {
tokens float64
last time.Time
}
func newRateLimiter(rps float64, burst int, window time.Duration) *rateLimiter {
func newRateLimiter(rate float64, burst int, evict time.Duration) *rateLimiter {
return &rateLimiter{
bk: make(map[string]*bucket),
rate: rps,
burst: float64(burst),
window: window,
rate: rate,
burst: float64(burst),
bk: make(map[string]*tokenBucket),
evictDur: evict,
lastGC: time.Now(),
}
}
@@ -34,45 +36,37 @@ func (rl *rateLimiter) allow(key string) bool {
rl.mu.Lock()
defer rl.mu.Unlock()
b := rl.bk[key]
if b == nil {
b = &bucket{tokens: rl.burst, last: now}
// GC old buckets occasionally
if now.Sub(rl.lastGC) > rl.evictDur {
for k, b := range rl.bk {
if now.Sub(b.lastFill) > rl.evictDur {
delete(rl.bk, k)
}
}
rl.lastGC = now
}
b, ok := rl.bk[key]
if !ok {
b = &tokenBucket{tokens: rl.burst, lastFill: now}
rl.bk[key] = b
}
// refill
elapsed := now.Sub(b.last).Seconds()
b.tokens = min(rl.burst, b.tokens+elapsed*rl.rate)
b.last = now
if b.tokens < 1.0 {
return false
}
b.tokens -= 1.0
// Refill
elapsed := now.Sub(b.lastFill).Seconds()
b.tokens = minf(rl.burst, b.tokens+elapsed*rl.rate)
b.lastFill = now
// occasional cleanup
for k, v := range rl.bk {
if now.Sub(v.last) > rl.window {
delete(rl.bk, k)
}
if b.tokens >= 1.0 {
b.tokens -= 1.0
return true
}
return true
return false
}
func min(a, b float64) float64 {
func minf(a, b float64) float64 {
if a < b {
return a
}
return b
}
func clientIP(r *http.Request) string {
// Prefer Cloudflare’s header if present; fall back to RemoteAddr.
if ip := r.Header.Get("CF-Connecting-IP"); ip != "" {
return ip
}
host, _, err := net.SplitHostPort(r.RemoteAddr)
if err != nil {
return r.RemoteAddr
}
return host
}

42
internal/index/index.go
View File

@@ -1,62 +1,48 @@
package index
import (
"errors"
"sync"
)
// Entry is the minimal metadata we expose to clients.
// Entry is the index record returned to clients.
// Keep metadata minimal to protect users.
type Entry struct {
Hash string `json:"hash"`
Bytes int64 `json:"bytes"`
StoredAt string `json:"stored_at"` // RFC3339Nano
Private bool `json:"private"` // true if client marked encrypted
CreatorTZ string `json:"creator_tz,omitempty"` // optional IANA TZ from client
StoredAt string `json:"stored_at"` // RFC3339Nano string
Private bool `json:"private"`
CreatorTZ string `json:"creator_tz,omitempty"`
Author string `json:"author,omitempty"` // pseudonymous (thumbprint), optional
}
// Index is an in-memory map from hash -> Entry, safe for concurrent use.
type Index struct {
mu sync.RWMutex
m map[string]Entry
mu sync.RWMutex
data map[string]Entry
}
func New() *Index {
return &Index{m: make(map[string]Entry)}
return &Index{data: make(map[string]Entry)}
}
func (ix *Index) Put(e Entry) error {
if e.Hash == "" {
return errors.New("empty hash")
}
ix.mu.Lock()
ix.m[e.Hash] = e
ix.data[e.Hash] = e
ix.mu.Unlock()
return nil
}
func (ix *Index) Delete(hash string) error {
if hash == "" {
return errors.New("empty hash")
}
ix.mu.Lock()
delete(ix.m, hash)
delete(ix.data, hash)
ix.mu.Unlock()
return nil
}
func (ix *Index) Get(hash string) (Entry, bool) {
ix.mu.RLock()
e, ok := ix.m[hash]
ix.mu.RUnlock()
return e, ok
}
// All returns an unsorted copy of all entries.
func (ix *Index) All() []Entry {
ix.mu.RLock()
out := make([]Entry, 0, len(ix.m))
for _, v := range ix.m {
out = append(out, v)
out := make([]Entry, 0, len(ix.data))
for _, e := range ix.data {
out = append(out, e)
}
ix.mu.RUnlock()
return out