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feat: Add immutable pointers to meta

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This commit is contained in:
Louis Holbrook
2021-10-25 18:51:08 +00:00
parent d8f51c5bdd
commit fe0835a4e7
8 changed files with 5930 additions and 131 deletions
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5
apps/cic-meta/scripts/initdb/server.postgres.sql
View File

@@ -1,8 +1,9 @@
create table if not exists store (
id serial primary key not null,
owner_fingerprint text not null,
owner_fingerprint text default null,
hash char(64) not null unique,
content text not null
content text not null,
mime_type text
);
create index if not exists idx_fp on store ((lower(owner_fingerprint)));

5
apps/cic-meta/scripts/initdb/server.sqlite.sql
View File

@@ -1,9 +1,10 @@
create table if not exists store (
/*id serial primary key not null,*/
id integer primary key autoincrement,
owner_fingerprint text not null,
owner_fingerprint text default null,
hash char(64) not null unique,
content text not null
content text not null,
mime_type text
);
create index if not exists idx_fp on store ((lower(owner_fingerprint)));

97
apps/cic-meta/scripts/server/handlers.ts
View File

@@ -1,12 +1,13 @@
import * as Automerge from 'automerge';
import * as pgp from 'openpgp';
import * as crypto from 'crypto';
import { Envelope, Syncable } from '@cicnet/crdt-meta';
import { Envelope, Syncable, bytesToHex } from '@cicnet/crdt-meta';
function handleNoMergeGet(db, digest, keystore) {
const sql = "SELECT content FROM store WHERE hash = '" + digest + "'";
return new Promise<string|boolean>((whohoo, doh) => {
const sql = "SELECT owner_fingerprint, content, mime_type FROM store WHERE hash = '" + digest + "'";
return new Promise<any>((whohoo, doh) => {
db.query(sql, (e, rs) => {
if (e !== null && e !== undefined) {
doh(e);
@@ -16,16 +17,36 @@ function handleNoMergeGet(db, digest, keystore) {
return;
}
const immutable = rs.rows[0]['owner_fingerprint'] == undefined;
let mimeType;
if (immutable) {
if (rs.rows[0]['mime_type'] === undefined) {
mimeType = 'application/octet-stream';
} else {
mimeType = rs.rows[0]['mime_type'];
}
} else {
mimeType = 'application/json';
}
const cipherText = rs.rows[0]['content'];
pgp.message.readArmored(cipherText).then((m) => {
const opts = {
message: m,
privateKeys: [keystore.getPrivateKey()],
format: 'binary',
};
pgp.decrypt(opts).then((plainText) => {
const o = Syncable.fromJSON(plainText.data);
const r = JSON.stringify(o.m['data']);
whohoo(r);
let r;
if (immutable) {
r = plainText.data;
} else {
mimeType = 'application/json';
const d = new TextDecoder().decode(plainText.data);
const o = Syncable.fromJSON(d);
r = JSON.stringify(o.m['data']);
}
whohoo([r, mimeType]);
}).catch((e) => {
console.error('decrypt', e);
doh(e);
@@ -57,6 +78,7 @@ function handleServerMergePost(data, db, digest, keystore, signer) {
} else {
e = Envelope.fromJSON(v);
s = e.unwrap();
console.debug('s', s, o)
s.replace(o, 'server merge');
e.set(s);
s.onwrap = (e) => {
@@ -139,7 +161,13 @@ function handleClientMergeGet(db, digest, keystore) {
privateKeys: [keystore.getPrivateKey()],
};
pgp.decrypt(opts).then((plainText) => {
const o = Syncable.fromJSON(plainText.data);
let d;
if (typeof(plainText.data) == 'string') {
d = plainText.data;
} else {
d = new TextDecoder().decode(plainText.data);
}
const o = Syncable.fromJSON(d);
const e = new Envelope(o);
whohoo(e.toJSON());
}).catch((e) => {
@@ -201,10 +229,65 @@ function handleClientMergePut(data, db, digest, keystore, signer) {
});
}
function handleImmutablePost(data, db, digest, keystore, contentType) {
return new Promise<Array<string|boolean>>((whohoo, doh) => {
let data_binary = data;
const h = crypto.createHash('sha256');
h.update(data_binary);
const z = h.digest();
const r = bytesToHex(z);
if (digest) {
if (r != digest) {
doh('hash mismatch: ' + r + ' != ' + digest);
return;
}
} else {
digest = r;
console.debug('calculated digest ' + digest);
}
handleNoMergeGet(db, digest, keystore).then((haveDigest) => {
if (haveDigest !== false) {
whohoo([false, digest]);
return;
}
let message;
if (typeof(data) == 'string') {
data_binary = new TextEncoder().encode(data);
message = pgp.message.fromText(data);
} else {
message = pgp.message.fromBinary(data);
}
const opts = {
message: message,
publicKeys: keystore.getEncryptKeys(),
};
pgp.encrypt(opts).then((cipherText) => {
const sql = "INSERT INTO store (hash, content, mime_type) VALUES ('" + digest + "', '" + cipherText.data + "', '" + contentType + "') ON CONFLICT (hash) DO UPDATE SET content = EXCLUDED.content;";
db.query(sql, (e, rs) => {
if (e !== null && e !== undefined) {
doh(e);
return;
}
whohoo([true, digest]);
});
}).catch((e) => {
doh(e);
});
}).catch((e) => {
doh(e);
});
});
}
export {
handleClientMergePut,
handleClientMergeGet,
handleServerMergePost,
handleServerMergePut,
handleNoMergeGet,
handleImmutablePost,
};

104
apps/cic-meta/scripts/server/server.ts
View File

@@ -118,37 +118,71 @@ async function processRequest(req, res) {
return;
}
let mod = req.method.toLowerCase() + ":automerge:";
let modDetail = undefined;
let immutablePost = false;
try {
digest = parseDigest(req.url);
} catch(e) {
console.error('digest error: ' + e)
res.writeHead(400, {"Content-Type": "text/plain"});
res.end();
return;
if (req.url == '/') {
immutablePost = true;
modDetail = 'immutable';
} else {
console.error('url is not empty (' + req.url + ') and not valid digest error: ' + e)
res.writeHead(400, {"Content-Type": "text/plain"});
res.end();
return;
}
}
const mergeHeader = req.headers['x-cic-automerge'];
let mod = req.method.toLowerCase() + ":automerge:";
switch (mergeHeader) {
case "client":
mod += "client"; // client handles merges
break;
case "server":
mod += "server"; // server handles merges
break;
default:
mod += "none"; // merged object only (get only)
if (modDetail === undefined) {
const mergeHeader = req.headers['x-cic-automerge'];
switch (mergeHeader) {
case "client":
if (immutablePost) {
res.writeHead(400, 'Valid digest missing', {"Content-Type": "text/plain"});
res.end();
return;
}
modDetail = "client"; // client handles merges
break;
case "server":
if (immutablePost) {
res.writeHead(400, 'Valid digest missing', {"Content-Type": "text/plain"});
res.end();
return;
}
modDetail = "server"; // server handles merges
break;
case "immutable":
modDetail = "immutable"; // no merging, literal immutable content with content-addressing
break;
default:
modDetail = "none"; // merged object only (get only)
}
}
mod += modDetail;
let data = '';
// handle bigger chunks of data
let data;
req.on('data', (d) => {
data += d;
if (data === undefined) {
data = d;
} else {
data += d;
}
});
req.on('end', async () => {
console.debug('mode', mod);
let content = '';
req.on('end', async (d) => {
let inputContentType = req.headers['content-type'];
let debugString = 'executing mode ' + mod ;
if (data !== undefined) {
debugString += ' for content type ' + inputContentType + ' length ' + data.length;
}
console.debug(debugString);
let content;
let contentType = 'application/json';
console.debug('handling data', data);
let statusCode = 200;
let r:any = undefined;
try {
switch (mod) {
@@ -176,6 +210,7 @@ async function processRequest(req, res) {
res.end();
return;
}
content = '';
break;
//case 'get:automerge:server':
// content = await handlers.handleServerMergeGet(db, digest, keystore);
@@ -183,12 +218,24 @@ async function processRequest(req, res) {
case 'get:automerge:none':
r = await handlers.handleNoMergeGet(db, digest, keystore);
if (r == false) {
if (r === false) {
res.writeHead(404, {"Content-Type": "text/plain"});
res.end();
return;
}
content = r;
content = r[0];
contentType = r[1];
break;
case 'post:automerge:immutable':
if (inputContentType === undefined) {
inputContentType = 'application/octet-stream';
}
r = await handlers.handleImmutablePost(data, db, digest, keystore, inputContentType);
if (r[0]) {
statusCode = 201;
}
content = r[1];
break;
default:
@@ -210,8 +257,15 @@ async function processRequest(req, res) {
return;
}
const responseContentLength = (new TextEncoder().encode(content)).length;
res.writeHead(200, {
//let responseContentLength;
//if (typeof(content) == 'string') {
// (new TextEncoder().encode(content)).length;
//}
const responseContentLength = content.length;
//if (responseContentLength === undefined) {
// responseContentLength = 0;
//}
res.writeHead(statusCode, {
"Access-Control-Allow-Origin": "*",
"Content-Type": contentType,
"Content-Length": responseContentLength,