Compare commits
20 Commits
Author | SHA1 | Date | |
---|---|---|---|
a8aeeaaa6c | |||
f9f6975b87 | |||
b9a6f1d5b0 | |||
489ad9284b | |||
6fdf0d9955 | |||
499a1893f9 | |||
2754447aae | |||
544277cb8a | |||
9a23960d21 | |||
23cca6cce3 | |||
2a9e58cc35 | |||
7d6a9921b5 | |||
3ee46a31f7 | |||
d72310ce10 | |||
1e14166ddb | |||
be38e91548 | |||
6c2057b119 | |||
08d7224016 | |||
bfa3330eb6 | |||
644fa2a49d |
@ -12,6 +12,9 @@ stages:
|
||||
- release
|
||||
- metadata
|
||||
|
||||
before_script:
|
||||
- npm install -g @shipzone/npmci
|
||||
|
||||
# ====================
|
||||
# security stage
|
||||
# ====================
|
||||
@ -36,6 +39,7 @@ auditProductionDependencies:
|
||||
- npmci command npm audit --audit-level=high --only=prod --production
|
||||
tags:
|
||||
- docker
|
||||
allow_failure: true
|
||||
|
||||
auditDevDependencies:
|
||||
image: registry.gitlab.com/hosttoday/ht-docker-node:npmci
|
||||
|
24
.vscode/launch.json
vendored
24
.vscode/launch.json
vendored
@ -2,28 +2,10 @@
|
||||
"version": "0.2.0",
|
||||
"configurations": [
|
||||
{
|
||||
"name": "current file",
|
||||
"type": "node",
|
||||
"command": "npm test",
|
||||
"name": "Run npm test",
|
||||
"request": "launch",
|
||||
"args": [
|
||||
"${relativeFile}"
|
||||
],
|
||||
"runtimeArgs": ["-r", "@gitzone/tsrun"],
|
||||
"cwd": "${workspaceRoot}",
|
||||
"protocol": "inspector",
|
||||
"internalConsoleOptions": "openOnSessionStart"
|
||||
},
|
||||
{
|
||||
"name": "test.ts",
|
||||
"type": "node",
|
||||
"request": "launch",
|
||||
"args": [
|
||||
"test/test.ts"
|
||||
],
|
||||
"runtimeArgs": ["-r", "@gitzone/tsrun"],
|
||||
"cwd": "${workspaceRoot}",
|
||||
"protocol": "inspector",
|
||||
"internalConsoleOptions": "openOnSessionStart"
|
||||
"type": "node-terminal"
|
||||
}
|
||||
]
|
||||
}
|
||||
|
@ -5,7 +5,7 @@
|
||||
"githost": "gitlab.com",
|
||||
"gitscope": "pushrocks",
|
||||
"gitrepo": "smartsocket",
|
||||
"shortDescription": "easy and secure websocket communication",
|
||||
"description": "easy and secure websocket communication",
|
||||
"npmPackagename": "@pushrocks/smartsocket",
|
||||
"license": "MIT",
|
||||
"projectDomain": "push.rocks"
|
||||
|
22531
package-lock.json
generated
22531
package-lock.json
generated
File diff suppressed because it is too large
Load Diff
33
package.json
33
package.json
@ -1,6 +1,6 @@
|
||||
{
|
||||
"name": "@pushrocks/smartsocket",
|
||||
"version": "1.2.2",
|
||||
"version": "1.2.12",
|
||||
"description": "easy and secure websocket communication",
|
||||
"main": "dist_ts/index.js",
|
||||
"typings": "dist_ts/index.d.ts",
|
||||
@ -22,25 +22,26 @@
|
||||
"@apiglobal/typedrequest-interfaces": "^1.0.15",
|
||||
"@pushrocks/isohash": "^1.0.2",
|
||||
"@pushrocks/isounique": "^1.0.4",
|
||||
"@pushrocks/lik": "^4.0.20",
|
||||
"@pushrocks/smartdelay": "^2.0.10",
|
||||
"@pushrocks/lik": "^5.0.0",
|
||||
"@pushrocks/smartdelay": "^2.0.13",
|
||||
"@pushrocks/smartenv": "^4.0.16",
|
||||
"@pushrocks/smartexpress": "^3.0.99",
|
||||
"@pushrocks/smartlog": "^2.0.39",
|
||||
"@pushrocks/smartpromise": "^3.1.3",
|
||||
"@pushrocks/smartexpress": "^3.0.108",
|
||||
"@pushrocks/smartjson": "^4.0.6",
|
||||
"@pushrocks/smartlog": "^2.0.44",
|
||||
"@pushrocks/smartpromise": "^3.1.6",
|
||||
"@pushrocks/smartrx": "^2.0.19",
|
||||
"@pushrocks/smarttime": "^3.0.37",
|
||||
"@types/socket.io": "^2.1.12",
|
||||
"@types/socket.io-client": "^1.4.34",
|
||||
"socket.io": "^3.0.4",
|
||||
"socket.io-client": "^3.0.4"
|
||||
"@pushrocks/smarttime": "^3.0.43",
|
||||
"@types/socket.io": "^3.0.2",
|
||||
"@types/socket.io-client": "^3.0.0",
|
||||
"socket.io": "^3.1.0",
|
||||
"socket.io-client": "^3.1.0"
|
||||
},
|
||||
"devDependencies": {
|
||||
"@gitzone/tsbuild": "^2.1.25",
|
||||
"@gitzone/tsrun": "^1.2.12",
|
||||
"@gitzone/tstest": "^1.0.52",
|
||||
"@pushrocks/tapbundle": "^3.2.9",
|
||||
"@types/node": "^14.14.14",
|
||||
"@gitzone/tsbuild": "^2.1.28",
|
||||
"@gitzone/tsrun": "^1.2.18",
|
||||
"@gitzone/tstest": "^1.0.60",
|
||||
"@pushrocks/tapbundle": "^3.2.15",
|
||||
"@types/node": "^17.0.9",
|
||||
"tslint": "^6.1.3",
|
||||
"tslint-config-prettier": "^1.18.0"
|
||||
},
|
||||
|
5
test/test.reconnect.ts
Normal file
5
test/test.reconnect.ts
Normal file
@ -0,0 +1,5 @@
|
||||
import { tap, expect } from '@pushrocks/tapbundle';
|
||||
|
||||
tap.test('should run a test', async () => {});
|
||||
|
||||
tap.start();
|
@ -90,6 +90,32 @@ tap.test('should react to a new websocket connection from client', async () => {
|
||||
await testSmartsocketClient.connect();
|
||||
});
|
||||
|
||||
tap.test('should be able to tag a connection from client', async (tools) => {
|
||||
await testSmartsocketClient.addTag({
|
||||
id: 'awesome',
|
||||
payload: 'yes',
|
||||
});
|
||||
const tagOnServerSide = await testSmartsocket.socketConnections
|
||||
.findSync((socketConnection) => {
|
||||
return true;
|
||||
})
|
||||
.getTagById('awesome');
|
||||
expect(tagOnServerSide.payload).to.equal('yes');
|
||||
});
|
||||
|
||||
tap.test('should be able to tag a connection from server', async (tools) => {
|
||||
await testSmartsocket.socketConnections
|
||||
.findSync((socketConnection) => {
|
||||
return true;
|
||||
})
|
||||
.addTag({
|
||||
id: 'awesome2',
|
||||
payload: 'absolutely',
|
||||
});
|
||||
const tagOnClientSide = await testSmartsocketClient.socketConnection.getTagById('awesome2');
|
||||
expect(tagOnClientSide.payload).to.equal('absolutely');
|
||||
});
|
||||
|
||||
tap.test('2 clients should connect in parallel', async () => {
|
||||
// TODO: implement parallel test
|
||||
});
|
||||
@ -108,7 +134,7 @@ tap.test('should be able to make a functionCall from server to client', async ()
|
||||
{
|
||||
hi: 'hi there from server',
|
||||
},
|
||||
testSmartsocket.socketConnections.find((socketConnection) => {
|
||||
testSmartsocket.socketConnections.findSync((socketConnection) => {
|
||||
return true;
|
||||
})
|
||||
);
|
||||
@ -118,10 +144,19 @@ tap.test('should be able to make a functionCall from server to client', async ()
|
||||
|
||||
tap.test('client should disconnect and reconnect', async (tools) => {
|
||||
await testSmartsocketClient.disconnect();
|
||||
await tools.delayFor(100);
|
||||
await testSmartsocketClient.connect();
|
||||
});
|
||||
|
||||
tap.test('should be able to locate a connection tag after reconnect', async (tools) => {
|
||||
console.log(testSmartsocket.socketConnections.getArray().length);
|
||||
const tagOnServerSide = await testSmartsocket.socketConnections
|
||||
.findSync((socketConnection) => {
|
||||
return true;
|
||||
})
|
||||
.getTagById('awesome');
|
||||
expect(tagOnServerSide.payload).to.equal('yes');
|
||||
});
|
||||
|
||||
// terminate
|
||||
tap.test('should close the server', async () => {
|
||||
await testSmartsocket.stop();
|
@ -1 +1,2 @@
|
||||
export * from './connection';
|
||||
export * from './tag';
|
||||
|
6
ts/interfaces/tag.ts
Normal file
6
ts/interfaces/tag.ts
Normal file
@ -0,0 +1,6 @@
|
||||
export interface ITag<T = any> {
|
||||
id: string;
|
||||
payload: T;
|
||||
}
|
||||
|
||||
export type TTagStore = { [key: string]: ITag };
|
@ -61,8 +61,8 @@ export class Smartsocket {
|
||||
await plugins.smartdelay.delayFor(1000);
|
||||
this.socketConnections.forEach((socketObjectArg: SocketConnection) => {
|
||||
if (socketObjectArg) {
|
||||
logger.log('info', `disconnect socket with >>alias ${socketObjectArg.alias}`);
|
||||
socketObjectArg.socket.disconnect();
|
||||
logger.log('info', `disconnecting socket with >>alias ${socketObjectArg.alias} due to server stop...`);
|
||||
socketObjectArg.disconnect();
|
||||
}
|
||||
});
|
||||
this.socketConnections.wipe();
|
||||
@ -113,7 +113,7 @@ export class Smartsocket {
|
||||
/**
|
||||
* the standard handler for new socket connections
|
||||
*/
|
||||
private async _handleSocketConnection(socketArg: pluginsTyped.socketIo.Socket) {
|
||||
private async _handleSocketConnection(socketArg: SocketIO.Socket) {
|
||||
const socketConnection: SocketConnection = new SocketConnection({
|
||||
alias: undefined,
|
||||
authenticated: false,
|
||||
@ -124,7 +124,14 @@ export class Smartsocket {
|
||||
});
|
||||
logger.log('info', 'Socket connected. Trying to authenticate...');
|
||||
this.socketConnections.add(socketConnection);
|
||||
const disconnectSubscription = socketConnection.eventSubject.subscribe((eventArg) => {
|
||||
if (eventArg === 'disconnected') {
|
||||
this.socketConnections.remove(socketConnection);
|
||||
disconnectSubscription.unsubscribe();
|
||||
}
|
||||
});
|
||||
await socketConnection.authenticate();
|
||||
await socketConnection.listenToFunctionRequests();
|
||||
await socketConnection.socket.emit('serverFullyReactive');
|
||||
}
|
||||
}
|
||||
|
@ -45,6 +45,40 @@ export class SmartsocketClient {
|
||||
public socketRequests = new plugins.lik.ObjectMap<SocketRequest<any>>();
|
||||
public socketRoles = new plugins.lik.ObjectMap<SocketRole>();
|
||||
|
||||
// tagStore
|
||||
private tagStore: { [key: string]: interfaces.ITag } = {};
|
||||
private tagStoreSubscription: plugins.smartrx.rxjs.Subscription;
|
||||
|
||||
/**
|
||||
* adds a tag to a connection
|
||||
*/
|
||||
public async addTag(tagArg: interfaces.ITag) {
|
||||
if (this.socketConnection) {
|
||||
await this.socketConnection.addTag(tagArg);
|
||||
} else {
|
||||
this.tagStore[tagArg.id] = tagArg;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* gets a tag by id
|
||||
* @param tagIdArg
|
||||
*/
|
||||
public async getTagById(tagIdArg: interfaces.ITag['id']) {
|
||||
return this.tagStore[tagIdArg];
|
||||
}
|
||||
|
||||
/**
|
||||
* removes a tag from a connection
|
||||
*/
|
||||
public async removeTagById(tagIdArg: interfaces.ITag['id']) {
|
||||
if (this.socketConnection) {
|
||||
this.socketConnection.removeTagById(tagIdArg);
|
||||
} else {
|
||||
delete this.tagStore[tagIdArg];
|
||||
}
|
||||
}
|
||||
|
||||
constructor(optionsArg: ISmartsocketClientOptions) {
|
||||
this.alias = optionsArg.alias;
|
||||
this.serverUrl = optionsArg.url;
|
||||
@ -104,11 +138,29 @@ export class SmartsocketClient {
|
||||
logger.log('info', 'server requested authentication');
|
||||
|
||||
// lets register the authenticated event
|
||||
this.socketConnection.socket.on('authenticated', () => {
|
||||
this.socketConnection.socket.on('authenticated', async () => {
|
||||
this.remoteShortId = requestAuthPayload.serverShortId;
|
||||
logger.log('info', 'client is authenticated');
|
||||
this.socketConnection.authenticated = true;
|
||||
this.socketConnection.listenToFunctionRequests();
|
||||
await this.socketConnection.listenToFunctionRequests();
|
||||
});
|
||||
|
||||
this.socketConnection.socket.on('serverFullyReactive', async () => {
|
||||
// lets take care of retagging
|
||||
const oldTagStore = this.tagStore;
|
||||
this.tagStoreSubscription?.unsubscribe();
|
||||
for (const keyArg of Object.keys(this.tagStore)) {
|
||||
this.socketConnection.addTag(this.tagStore[keyArg]);
|
||||
}
|
||||
this.tagStoreSubscription = this.socketConnection.tagStoreObservable.subscribe(
|
||||
(tagStoreArg) => {
|
||||
this.tagStore = tagStoreArg;
|
||||
}
|
||||
);
|
||||
|
||||
for (const tag of Object.keys(oldTagStore)) {
|
||||
await this.addTag(oldTagStore[tag]);
|
||||
}
|
||||
done.resolve();
|
||||
});
|
||||
|
||||
@ -150,6 +202,7 @@ export class SmartsocketClient {
|
||||
* disconnect from the server
|
||||
*/
|
||||
public async disconnect() {
|
||||
this.tagStoreSubscription?.unsubscribe();
|
||||
if (this.socketConnection) {
|
||||
await this.socketConnection.disconnect();
|
||||
this.socketConnection = undefined;
|
||||
@ -176,7 +229,7 @@ export class SmartsocketClient {
|
||||
* try a reconnection
|
||||
*/
|
||||
public async tryDebouncedReconnect() {
|
||||
await plugins.smartdelay.delayForRandom(10000, 60000);
|
||||
await plugins.smartdelay.delayForRandom(10000, 50000);
|
||||
await this.connect();
|
||||
}
|
||||
|
||||
|
@ -8,7 +8,7 @@ import { SocketRequest, ISocketRequestDataObject } from './smartsocket.classes.s
|
||||
import { SocketRole } from './smartsocket.classes.socketrole';
|
||||
|
||||
// socket.io
|
||||
import * as SocketIO from 'socket.io';
|
||||
import * as pluginsTyped from './smartsocket.pluginstyped';
|
||||
import { SmartsocketClient } from './smartsocket.classes.smartsocketclient';
|
||||
import { logger } from './smartsocket.logging';
|
||||
|
||||
@ -57,6 +57,10 @@ export class SocketConnection {
|
||||
public eventSubject = new plugins.smartrx.rxjs.Subject<interfaces.TConnectionStatus>();
|
||||
public eventStatus: interfaces.TConnectionStatus = 'new';
|
||||
|
||||
private tagStore: interfaces.TTagStore = {};
|
||||
public tagStoreObservable = new plugins.smartrx.rxjs.Subject<interfaces.TTagStore>();
|
||||
public remoteTagStoreObservable = new plugins.smartrx.rxjs.Subject<interfaces.TTagStore>();
|
||||
|
||||
constructor(optionsArg: ISocketConnectionConstructorOptions) {
|
||||
this.alias = optionsArg.alias;
|
||||
this.authenticated = optionsArg.authenticated;
|
||||
@ -79,9 +83,49 @@ export class SocketConnection {
|
||||
);
|
||||
await this.disconnect();
|
||||
allSocketConnections.remove(this);
|
||||
this.eventSubject.next('disconnected');
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* adds a tag to a connection
|
||||
*/
|
||||
public async addTag(tagArg: interfaces.ITag) {
|
||||
const done = plugins.smartpromise.defer();
|
||||
this.tagStore[tagArg.id] = tagArg;
|
||||
this.tagStoreObservable.next(this.tagStore);
|
||||
const remoteSubscription = this.remoteTagStoreObservable.subscribe((remoteTagStore) => {
|
||||
if (!remoteTagStore[tagArg.id]) {
|
||||
return;
|
||||
}
|
||||
const localTagString = plugins.smartjson.stringify(tagArg);
|
||||
const remoteTagString = plugins.smartjson.stringify(remoteTagStore[tagArg.id]);
|
||||
if (localTagString === remoteTagString) {
|
||||
remoteSubscription.unsubscribe();
|
||||
done.resolve();
|
||||
}
|
||||
});
|
||||
this.socket.emit('updateTagStore', this.tagStore);
|
||||
await done.promise;
|
||||
}
|
||||
|
||||
/**
|
||||
* gets a tag by id
|
||||
* @param tagIdArg
|
||||
*/
|
||||
public async getTagById(tagIdArg: interfaces.ITag['id']) {
|
||||
return this.tagStore[tagIdArg];
|
||||
}
|
||||
|
||||
/**
|
||||
* removes a tag from a connection
|
||||
*/
|
||||
public async removeTagById(tagIdArg: interfaces.ITag['id']) {
|
||||
delete this.tagStore[tagIdArg];
|
||||
this.tagStoreObservable.next(this.tagStore);
|
||||
this.socket.emit('updateTagStore', this.tagStore);
|
||||
}
|
||||
|
||||
// authenticating --------------------------
|
||||
|
||||
/**
|
||||
@ -91,7 +135,7 @@ export class SocketConnection {
|
||||
const done = plugins.smartpromise.defer();
|
||||
this.socket.on('dataAuth', async (dataArg: ISocketConnectionAuthenticationObject) => {
|
||||
logger.log('info', 'received authentication data. now hashing and comparing...');
|
||||
this.socket.removeListener('dataAuth', () => {});
|
||||
this.socket.removeAllListeners('dataAuth');
|
||||
if (await SocketRole.checkPasswordForRole(dataArg, this.smartsocketRef)) {
|
||||
// TODO: authenticate password
|
||||
this.alias = dataArg.alias;
|
||||
@ -124,7 +168,7 @@ export class SocketConnection {
|
||||
this.socket.on('function', (dataArg: ISocketRequestDataObject<any>) => {
|
||||
// check if requested function is available to the socket's scope
|
||||
// logger.log('info', 'function request received');
|
||||
const referencedFunction: SocketFunction<any> = this.role.allowedFunctions.find(
|
||||
const referencedFunction: SocketFunction<any> = this.role.allowedFunctions.findSync(
|
||||
(socketFunctionArg) => {
|
||||
return socketFunctionArg.name === dataArg.funcCallData.funcName;
|
||||
}
|
||||
@ -150,6 +194,16 @@ export class SocketConnection {
|
||||
);
|
||||
targetSocketRequest.handleResponse(dataArg);
|
||||
});
|
||||
|
||||
this.socket.on('updateTagStore', async (tagStoreArg: interfaces.TTagStore) => {
|
||||
if (!plugins.smartjson.deepEqualObjects(this.tagStore, tagStoreArg)) {
|
||||
this.tagStore = tagStoreArg;
|
||||
this.socket.emit('updateTagStore', this.tagStore);
|
||||
this.tagStoreObservable.next(this.tagStore);
|
||||
}
|
||||
this.remoteTagStoreObservable.next(tagStoreArg);
|
||||
});
|
||||
|
||||
logger.log('info', `now listening to function requests for ${this.alias}`);
|
||||
done.resolve(this);
|
||||
} else {
|
||||
|
@ -58,7 +58,7 @@ export class SocketFunction<T extends plugins.typedrequestInterfaces.ITypedReque
|
||||
smartsocketRefArg: Smartsocket | SmartsocketClient,
|
||||
functionNameArg: string
|
||||
): SocketFunction<Q> {
|
||||
return smartsocketRefArg.socketFunctions.find((socketFunctionArg) => {
|
||||
return smartsocketRefArg.socketFunctions.findSync((socketFunctionArg) => {
|
||||
return socketFunctionArg.name === functionNameArg;
|
||||
});
|
||||
}
|
||||
|
@ -45,7 +45,7 @@ export class SocketRequest<T extends plugins.typedrequestInterfaces.ITypedReques
|
||||
smartsocketRef: Smartsocket | SmartsocketClient,
|
||||
shortIdArg: string
|
||||
): SocketRequest<any> {
|
||||
return smartsocketRef.socketRequests.find((socketRequestArg) => {
|
||||
return smartsocketRef.socketRequests.findSync((socketRequestArg) => {
|
||||
return socketRequestArg.shortid === shortIdArg;
|
||||
});
|
||||
}
|
||||
|
@ -23,7 +23,7 @@ export class SocketRole {
|
||||
referenceSmartsocket: Smartsocket | SmartsocketClient,
|
||||
socketRoleNameArg: string
|
||||
): SocketRole {
|
||||
return referenceSmartsocket.socketRoles.find((socketRoleArg) => {
|
||||
return referenceSmartsocket.socketRoles.findSync((socketRoleArg) => {
|
||||
return socketRoleArg.name === socketRoleNameArg;
|
||||
});
|
||||
}
|
||||
@ -32,8 +32,10 @@ export class SocketRole {
|
||||
dataArg: ISocketConnectionAuthenticationObject,
|
||||
referenceSmartsocket: Smartsocket | SmartsocketClient
|
||||
): Promise<boolean> {
|
||||
const targetPasswordHash = SocketRole.getSocketRoleByName(referenceSmartsocket, dataArg.role)
|
||||
.passwordHash;
|
||||
const targetPasswordHash = SocketRole.getSocketRoleByName(
|
||||
referenceSmartsocket,
|
||||
dataArg.role
|
||||
).passwordHash;
|
||||
const computedCompareHash = await plugins.isohash.sha256FromString(dataArg.password);
|
||||
return targetPasswordHash === computedCompareHash;
|
||||
}
|
||||
|
@ -12,7 +12,10 @@ import { logger } from './smartsocket.logging';
|
||||
export class SocketServer {
|
||||
private smartsocket: Smartsocket;
|
||||
private httpServer: pluginsTyped.http.Server | pluginsTyped.https.Server;
|
||||
// wether httpServer is standalone
|
||||
|
||||
/**
|
||||
* wether httpServer is standalone
|
||||
*/
|
||||
private standaloneServer = false;
|
||||
|
||||
constructor(smartSocketInstance: Smartsocket) {
|
||||
@ -77,5 +80,9 @@ export class SocketServer {
|
||||
/**
|
||||
* closes the server
|
||||
*/
|
||||
public async stop() {}
|
||||
public async stop() {
|
||||
if (this.httpServer) {
|
||||
this.httpServer.close();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
@ -1,3 +0,0 @@
|
||||
import * as plugins from './smartsocket.plugins';
|
||||
|
||||
export class SocketStats {}
|
@ -8,6 +8,7 @@ import * as isohash from '@pushrocks/isohash';
|
||||
import * as isounique from '@pushrocks/isounique';
|
||||
import * as lik from '@pushrocks/lik';
|
||||
import * as smartenv from '@pushrocks/smartenv';
|
||||
import * as smartjson from '@pushrocks/smartjson';
|
||||
import * as smartlog from '@pushrocks/smartlog';
|
||||
import * as smartdelay from '@pushrocks/smartdelay';
|
||||
import * as smartpromise from '@pushrocks/smartpromise';
|
||||
@ -19,6 +20,7 @@ export {
|
||||
isounique,
|
||||
lik,
|
||||
smartenv,
|
||||
smartjson,
|
||||
smartlog,
|
||||
smartdelay,
|
||||
smartpromise,
|
||||
|
@ -13,4 +13,4 @@ export { smartexpress };
|
||||
import type socketIo from 'socket.io';
|
||||
import type socketIoClient from 'socket.io-client';
|
||||
|
||||
export { socketIo, socketIoClient };
|
||||
export { socketIoClient, socketIo };
|
||||
|
Reference in New Issue
Block a user