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// pre.js - linked into each gnunet-web service
// Copyright (C) 2013,2014 David Barksdale <amatus@amatus.name>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
var xhrs = []; // plugin_transport_http_client
var psdb; // plugin_peerstore_emscripten
var WorkerMessageQueue = [];
function flush_worker_message_queue(f) {
WorkerMessageQueue.forEach(f);
WorkerMessageQueue = [];
}
var dev_urandom_bytes = 0;
var random_bytes = [];
var random_offset = 0;
gnunet_prerun = function() {
ENV.GNUNET_PREFIX = "/.";
Module['print'] = function(x) { WorkerMessageQueue.push(x); };
Module['printErr'] = function(x) { Module.print(x); };
[
'ats_proportional',
'block_dht',
'block_fs',
'datacache_heap',
'datastore_heap',
'peerstore_emscripten',
'transport_http_client',
].forEach(function(plugin) {
FS.createPreloadedFile('/', 'libgnunet_plugin_' + plugin + '.js',
'libgnunet_plugin_' + plugin + '.js', true, false);
});
// Create /dev/random but it doesn't need to do anything
var id = FS.makedev(1, 8);
FS.registerDevice(id, {});
FS.mkdev('/dev/random', id);
// Create /dev/urandom
var id = FS.makedev(1, 9);
FS.registerDevice(id, {
read: function(stream, buffer, offset, length, pos) {
dev_urandom_bytes += length;
for (var i = 0; i < length && random_offset < random_bytes.length; i++) {
buffer[offset+i] = random_bytes[random_offset];
random_bytes[random_offset++] = 0;
}
if (i < length)
Module.printErr('Random bytes exausted!');
return i;
},
});
FS.mkdev('/dev/urandom', id);
// Mount IDBFS for services that use it
var match = location.pathname.match('gnunet-service-(.*).js');
if (match) {
var service = match[1];
var mounts = {peerinfo: true, fs: true, nse: true};
if (mounts[service]) {
var mount = '/' + service;
FS.mkdir(mount);
FS.mount(IDBFS, {}, mount);
addRunDependency('syncfs');
FS.syncfs(true, function() { removeRunDependency('syncfs'); });
var syncfs_task;
var sync_callback = function() {
clearTimeout(syncfs_task);
syncfs_task = setTimeout(function() {
FS.syncfs(false, sync_callback);
}, 5000);
};
sync_callback();
}
}
addRunDependency('window-init');
}
if (typeof(Module) === "undefined") Module = { preRun: [] };
Module.preRun.push(gnunet_prerun);
// a map of window index to port
var windows = {};
// next available index
var next_window = 1;
onconnect = function(ev) {
ev.ports[0].onmessage = get_message;
ev.ports[0]._name = next_window;
windows[next_window] = ev.ports[0];
next_window++;
};
// do to any window
function do_to_window(fn) {
for (var w in windows) {
fn(windows[w]);
return;
}
}
function get_message(ev) {
if ('init' == ev.data.type) {
var stdout = new MessageChannel();
var stderr = new MessageChannel();
Module['print'] = function(x) { stdout.port1.postMessage(x); };
Module['printErr'] = function(x) { stderr.port1.postMessage(x); };
flush_worker_message_queue(Module.print);
ev.target.postMessage(
{type: 'init', stdout: stdout.port2, stderr: stderr.port2},
[stdout.port2, stderr.port2]);
FS.writeFile('/private_key', ev.data['private-key'], {encoding: 'binary'});
random_bytes = ev.data['random-bytes'];
random_offset = 0;
removeRunDependency('window-init');
} else if ('connect' == ev.data.type) {
SERVER.connect(ev.data.port, ev.data['client-name']);
}
}
// Ask a window to connect us to a service
function client_connect(service_name, message_port) {
//Module.print('I want to connect to ' + service_name);
do_to_window(function(w) {
//Module.print('I am now connecting to ' + service_name);
w.postMessage({
type: 'client_connect',
service_name: service_name,
client_name: location.pathname,
message_port: message_port}, [message_port]);
});
}
function breakpoint() {
var x = 1; // Something to break on
}
// vim: set expandtab ts=2 sw=2:
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