Press n or j to go to the next uncovered block, b, p or k for the previous block.
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"use strict";
var events = require('events'),
util = require('util'),
crypto = require('crypto'),
nano = require('nano'),
axios = require('axios'),
design = require('./design'),
status_not_found = 404,
status_conflict = 409,
status_db_exists = 412;
function PubKeyStoreCouchDB(config, cb)
{
events.EventEmitter.call(this);
var ths = this,
called_back = false;
this._config = config;
this.db_host = config.db_host || 'http://127.0.0.1';
this.db_port = config.db_port || 5984;
const requestDefaults = {
auth: config.username ? {
username: config.username,
password: config.password
} : undefined,
strictSSL: true,
ca: config.ca,
pool: {
maxSockets: config.maxSockets || Infinity
}
};
this._nano = nano(
{
url: this.db_host + ':' + this.db_port,
requestDefaults
});
this.db_name = config.db_name || 'pub-keys';
this._db = this._nano.use(this.db_name);
if (config.no_changes)
{
return this._db.info(function (err)
{
if (err && (err.statusCode === status_not_found))
{
return cb(new Error('not_found'), ths);
}
return cb(err, ths);
});
}
const relax = this._db.changesReader.request;
this._db.changesReader.request = async function (opts)
{
const promise = relax(opts);
process.nextTick(() => ths._feed.emit('confirm'));
return await promise;
};
this._feed = this._db.changesReader.start(
{
since: 'now'
});
this._feed.on('change', function (change)
{
if (change.id.lastIndexOf('_design/', 0) === 0)
{
return;
}
if (config.verbose)
{
console.log('database change', change);
}
var rev, changes = change.changes, i, chng, crev;
for (i = 0; i < changes.length; i += 1)
{
chng = changes[i];
crev = chng.rev;
if (crev !== undefined)
{
rev = crev;
}
}
ths.emit('change', change.id, rev, !!change.deleted);
});
this._feed.on('error', function (err)
{
if (!this._feed)
{
return;
}
err.feed_error = true;
if ((err.statusCode === status_not_found) ||
(err.message && (err.message.indexOf('missing_target') >= 0)))
{
err.message = 'not_found';
}
if (called_back)
{
ths.emit('error', err);
}
else
{
called_back = true;
cb(err, ths);
}
});
this._feed.once('confirm', function ()
{
if (!called_back)
{
called_back = true;
cb(null, ths);
}
});
}
util.inherits(PubKeyStoreCouchDB, events.EventEmitter);
PubKeyStoreCouchDB.prototype.get_pub_key_by_issuer_id = function (issuer_id, cb)
{
if (!this._db) { return cb(new Error('not_open')); }
if ((issuer_id === null) || (issuer_id === undefined))
{
return cb(null, null);
}
this._db.view('pub_keys', 'by_issuer_id',
{
key: issuer_id
}, function (err, res)
{
if (err) { return cb(err); }
if (res.rows.length === 0) { return cb(null, null); }
var res0 = res.rows[0];
cb(null, res0.value.pub_key, res0.id, res0.value.rev);
});
};
PubKeyStoreCouchDB.prototype.get_uris = function (cb)
{
if (!this._db) { return cb(new Error('not_open')); }
this._db.list(function (err, res)
{
if (err) { return cb(err); }
var i, key, uris = [];
for (i = 0; i < res.rows.length; i += 1)
{
key = res.rows[i].key;
if (key.lastIndexOf('_design/', 0) !== 0)
{
uris.push(key);
}
}
cb(null, uris);
});
};
PubKeyStoreCouchDB.prototype.get_issuer_id = function (uri, cb)
{
if (!this._db) { return cb(new Error('not_open')); }
if ((uri === null) || (uri === undefined))
{
return cb(null, null);
}
this._db.get(uri, function (err, doc)
{
if (err) { return cb(err.statusCode === status_not_found ? null : err, null); }
cb(null, doc.issuer_id, doc._rev);
});
};
PubKeyStoreCouchDB.prototype.get_pub_key_by_uri = function (uri, cb)
{
if (!this._db) { return cb(new Error('not_open')); }
if ((uri === null) || (uri === undefined))
{
return cb(null, null);
}
this._db.get(uri, function (err, doc)
{
if (err) { return cb(err.statusCode === status_not_found ? null : err, null); }
cb(null, doc.pub_key, doc.issuer_id, doc._rev);
});
};
PubKeyStoreCouchDB.prototype.add_pub_key = function (uri, pub_key, options, cb)
{
if (typeof options === 'function')
{
cb = options;
options = {};
}
options = options || {};
cb = cb || function () { return undefined; };
if (!this._db) { return cb(new Error('not_open')); }
if ((uri === null) || (uri === undefined))
{
return cb(new Error('invalid_uri'));
}
var ths = this,
issuer_id = crypto.randomBytes(64).toString('hex'),
doc = { issuer_id: issuer_id, pub_key: pub_key };
if (this._config.no_updates && !options.allow_update)
{
return this._db.insert(doc, uri, function (err, res)
{
if (err) { return cb(err); }
cb(null, issuer_id, res.rev);
});
}
// Find existing revision first otherwise revision may start from 1
// (if doc has been deleted), meaning subsequent deletions will have
// revision 2. When replicating, if the replica has a doc with a higher
// revision, the deletion is lost.
this._db.fetch({ keys: [ uri ] }, function (err, res)
{
if (err) { return cb(err); }
var row = res.rows[0];
if (row.error)
{
if (row.error !== 'not_found') { return cb(row.error); }
}
else
{
doc._rev = row.value.rev;
}
if (!ths._db) { return cb(new Error('not_open')); }
ths._db.insert(doc, uri, function (err, res)
{
// if conflict then try again
if (err)
{
if (err.statusCode === status_conflict)
{
return setTimeout(function ()
{
ths.add_pub_key(uri, pub_key, cb);
}, 1000 + Math.random() * 1000);
}
return cb(err);
}
cb(null, issuer_id, res.rev);
});
});
};
PubKeyStoreCouchDB.prototype.remove_pub_key = function (uri, cb)
{
cb = cb || function () { return undefined; };
if (!this._db) { return cb(new Error('not_open')); }
if ((uri === null) || (uri === undefined))
{
return cb(new Error('invalid_uri'));
}
var ths = this;
this._db.get(uri, function (err, doc)
{
if (err) { return cb(err.statusCode === status_not_found ? null : err); }
if (!ths._db) { return cb(new Error('not_open')); }
ths._db.destroy(uri, doc._rev, cb);
});
};
PubKeyStoreCouchDB.prototype._stop = function (cb)
{
if (this._feed && this._db.changesReader.started)
{
this._feed.once('end', cb);
this._feed = null;
return this._db.changesReader.stop();
}
cb();
};
PubKeyStoreCouchDB.prototype._close_nano = function (cb)
{
if (!this._nano) { return cb(new Error('not_open')); }
this._nano = null;
this._db = null;
cb();
};
PubKeyStoreCouchDB.prototype.close = function (cb)
{
cb = cb || function () { return undefined; };
var ths = this;
this._stop(function ()
{
ths._close_nano(cb);
});
};
PubKeyStoreCouchDB.prototype.create = function (cb)
{
cb = cb || function () { return undefined; };
if (!this._db) { return cb(new Error('not_open')); }
var ths = this;
this._nano.db.create(this.db_name, function (err)
{
if (err && (err.statusCode !== status_db_exists)) { return cb(err); }
if (!ths._db) { return cb(new Error('not_open')); }
/*jslint unparam: true */
ths._db.insert(
{
views: {},
validate_doc_update: design.validate.toString().replace('DB_NAME', ths.db_name)
}, '_design/_auth', function (err)
{
if (err && (err.statusCode !== status_conflict)) { return cb(err); }
if (!ths._db) { return cb(new Error('not_open')); }
ths._db.insert(
{
views: {
by_issuer_id: {
map: design.by_issuer_id
}
}
}, '_design/pub_keys', function (err)
{
if (err && (err.statusCode !== status_conflict)) { return cb(err); }
if (!ths._db) { return cb(new Error('not_open')); }
cb();
});
});
/*jslint unparam: false */
});
};
PubKeyStoreCouchDB.prototype.destroy = function (cb)
{
cb = cb || function () { return undefined; };
var ths = this;
this._stop(function ()
{
if (!ths._db) { return cb(new Error('not_open')); }
ths._nano.db.destroy(ths.db_name, function (err)
{
if (err && (err.statusCode != status_not_found))
{
return cb(err);
}
ths._close_nano(cb);
});
});
};
PubKeyStoreCouchDB.prototype.deploy = function (cb)
{
if (cb) { cb(); }
};
PubKeyStoreCouchDB.prototype.replicate = function (opts, cb)
{
if (typeof opts === 'function')
{
cb = opts;
}
cb = cb || (() => {});
if (!this._db)
{
return cb(new Error('not_open'));
}
this.emit('replicated', function (cb)
{
cb();
});
cb();
};
module.exports = function (config, cb)
{
return new PubKeyStoreCouchDB(config, cb);
};
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