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x.websocket: move to net.websocket module (#10648)

This commit is contained in:
Tomas Hellström 2021-07-03 01:56:00 +02:00 committed by GitHub
parent c44a47acb1
commit ec973f5c6e
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GPG Key ID: 4AEE18F83AFDEB23
41 changed files with 1656 additions and 67 deletions

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@ -27,25 +27,25 @@ jobs:
- name: v doctor
run: ./v doctor
- name: Run websockets tests
run: ./v -g test vlib/x/websocket/
run: ./v -g test vlib/net/websocket/
## Autobahn integrations tests
- name: Run autobahn services
run: docker-compose -f ${{github.workspace}}/vlib/x/websocket/tests/autobahn/docker-compose.yml up -d
run: docker-compose -f ${{github.workspace}}/vlib/net/websocket/tests/autobahn/docker-compose.yml up -d
- name: Wait for the service to start
run: sleep 10s
- name: Build client test
run: docker exec autobahn_client "/src/v" "/src/vlib/x/websocket/tests/autobahn/autobahn_client.v"
run: docker exec autobahn_client "/src/v" "/src/vlib/net/websocket/tests/autobahn/autobahn_client.v"
- name: Run client test
run: docker exec autobahn_client "/src/vlib/x/websocket/tests/autobahn/autobahn_client"
run: docker exec autobahn_client "/src/vlib/net/websocket/tests/autobahn/autobahn_client"
- name: Build client wss test
run: docker exec autobahn_client "/src/v" "/src/vlib/x/websocket/tests/autobahn/autobahn_client_wss.v"
run: docker exec autobahn_client "/src/v" "/src/vlib/net/websocket/tests/autobahn/autobahn_client_wss.v"
- name: Run client wss test
run: docker exec autobahn_client "/src/vlib/x/websocket/tests/autobahn/autobahn_client_wss"
run: docker exec autobahn_client "/src/vlib/net/websocket/tests/autobahn/autobahn_client_wss"
- name: Run server test
run: docker exec autobahn_server "wstest" "-m" "fuzzingclient" "-s" "/config/fuzzingclient.json"

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@ -44,11 +44,11 @@ const (
'vlib/vweb/request_test.v',
'vlib/net/http/request_test.v',
'vlib/vweb/route_test.v',
'vlib/x/websocket/websocket_test.v',
'vlib/net/websocket/websocket_test.v',
'vlib/crypto/rand/crypto_rand_read_test.v',
]
skip_with_fsanitize_address = [
'vlib/x/websocket/websocket_test.v',
'vlib/net/websocket/websocket_test.v',
]
skip_with_fsanitize_undefined = [
'do_not_remove',
@ -83,7 +83,7 @@ const (
'vlib/vweb/request_test.v',
'vlib/net/http/request_test.v',
'vlib/vweb/route_test.v',
'vlib/x/websocket/websocket_test.v',
'vlib/net/websocket/websocket_test.v',
'vlib/net/http/http_httpbin_test.v',
'vlib/net/http/header_test.v',
]
@ -98,7 +98,7 @@ const (
'vlib/v/tests/orm_sub_struct_test.v',
'vlib/net/websocket/ws_test.v',
'vlib/net/unix/unix_test.v',
'vlib/x/websocket/websocket_test.v',
'vlib/net/websocket/websocket_test.v',
'vlib/vweb/tests/vweb_test.v',
'vlib/vweb/request_test.v',
'vlib/net/http/request_test.v',

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@ -1,7 +1,7 @@
module main
import os
import x.websocket
import net.websocket
import term
// This client should be compiled an run in different konsoles

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@ -1,6 +1,6 @@
module main
import x.websocket
import net.websocket
import term
// this server accepts client connections and broadcast all messages to other connected clients

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@ -2,7 +2,7 @@ module main
import time
import os
import x.websocket
import net.websocket
fn main() {
println('press enter to quit...\n')
@ -12,6 +12,8 @@ fn main() {
os.get_line()
}
// start_server starts the websocket server, it receives messages
// and send it back to the client that sent it
fn start_server() ? {
mut s := websocket.new_server(.ip6, 30000, '')
// Make that in execution test time give time to execute at least one time
@ -36,6 +38,8 @@ fn start_server() ? {
}
}
// start_client starts the websocket client, it writes a message to
// the server and prints all the messages received
fn start_client() ? {
mut ws := websocket.new_client('ws://localhost:30000') ?
// mut ws := websocket.new_client('wss://echo.websocket.org:443')?

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@ -1,9 +1,33 @@
module openssl
import net
import net.openssl as nssl
import time
// SSLConn is the current connection
pub struct SSLConn {
mut:
sslctx &C.SSL_CTX
ssl &C.SSL
handle int
duration time.Duration
}
// new_ssl_conn instance an new SSLCon struct
pub fn new_ssl_conn() &SSLConn {
return &SSLConn{
sslctx: 0
ssl: 0
handle: 0
}
}
// Select operation
enum Select {
read
write
except
}
// shutdown closes the ssl connection and do clean up
pub fn (mut s SSLConn) shutdown() ? {
if s.ssl != 0 {
@ -11,7 +35,7 @@ pub fn (mut s SSLConn) shutdown() ? {
for {
res = C.SSL_shutdown(voidptr(s.ssl))
if res < 0 {
err_res := nssl.ssl_error(res, s.ssl) or {
err_res := ssl_error(res, s.ssl) or {
break // We break to free rest of resources
}
if err_res == .ssl_error_want_read {
@ -99,7 +123,7 @@ pub fn (mut s SSLConn) connect(mut tcp_conn net.TcpConn, hostname string) ? {
for {
res = C.SSL_connect(voidptr(s.ssl))
if res != 1 {
err_res := nssl.ssl_error(res, s.ssl) ?
err_res := ssl_error(res, s.ssl) ?
if err_res == .ssl_error_want_read {
for {
ready := @select(s.handle, .read, s.duration) ?
@ -128,7 +152,7 @@ pub fn (mut s SSLConn) socket_read_into_ptr(buf_ptr &byte, len int) ?int {
for {
res = C.SSL_read(voidptr(s.ssl), buf_ptr, len)
if res < 0 {
err_res := nssl.ssl_error(res, s.ssl) ?
err_res := ssl_error(res, s.ssl) ?
if err_res == .ssl_error_want_read {
for {
ready := @select(s.handle, .read, s.duration) ?
@ -170,7 +194,7 @@ pub fn (mut s SSLConn) write(bytes []byte) ?int {
remaining := bytes.len - total_sent
mut sent := C.SSL_write(voidptr(s.ssl), ptr, remaining)
if sent <= 0 {
err_res := nssl.ssl_error(sent, s.ssl) ?
err_res := ssl_error(sent, s.ssl) ?
if err_res == .ssl_error_want_read {
for {
ready := @select(s.handle, .read, s.duration) ?
@ -202,9 +226,9 @@ This is basically a copy of Emily socket implementation of select.
This have to be consolidated into common net lib features
when merging this to V
*/
[typedef]
pub struct C.fd_set {
}
// [typedef]
// pub struct C.fd_set {
// }
// Select waits for an io operation (specified by parameter `test`) to be available
fn @select(handle int, test Select, timeout time.Duration) ?bool {

227
vlib/net/websocket/events.v Normal file
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@ -0,0 +1,227 @@
module websocket
// MessageEventHandler represents a callback on a new message
struct MessageEventHandler {
handler SocketMessageFn // callback function
handler2 SocketMessageFn2 // callback function with reference
is_ref bool // true if has a reference object
ref voidptr // referenced object
}
// ErrorEventHandler represents a callback on error
struct ErrorEventHandler {
handler SocketErrorFn // callback function
handler2 SocketErrorFn2 // callback function with reference
is_ref bool // true if has a reference object
ref voidptr // referenced object
}
// OpenEventHandler represents a callback when connection is opened
struct OpenEventHandler {
handler SocketOpenFn // callback function
handler2 SocketOpenFn2 // callback function with reference
is_ref bool // true if has a reference object
ref voidptr // referenced object
}
// CloseEventHandler represents a callback on a closing event
struct CloseEventHandler {
handler SocketCloseFn // callback function
handler2 SocketCloseFn2 // callback function with reference
is_ref bool // true if has a reference object
ref voidptr // referenced object
}
pub type AcceptClientFn = fn (mut c ServerClient) ?bool
pub type SocketMessageFn = fn (mut c Client, msg &Message) ?
pub type SocketMessageFn2 = fn (mut c Client, msg &Message, v voidptr) ?
pub type SocketErrorFn = fn (mut c Client, err string) ?
pub type SocketErrorFn2 = fn (mut c Client, err string, v voidptr) ?
pub type SocketOpenFn = fn (mut c Client) ?
pub type SocketOpenFn2 = fn (mut c Client, v voidptr) ?
pub type SocketCloseFn = fn (mut c Client, code int, reason string) ?
pub type SocketCloseFn2 = fn (mut c Client, code int, reason string, v voidptr) ?
// on_connect registers a callback when client connects to the server
pub fn (mut s Server) on_connect(fun AcceptClientFn) ? {
if s.accept_client_callbacks.len > 0 {
return error('only one callback can be registered for accept client')
}
s.accept_client_callbacks << fun
}
// on_message registers a callback on new messages
pub fn (mut s Server) on_message(fun SocketMessageFn) {
s.message_callbacks << MessageEventHandler{
handler: fun
}
}
// on_message_ref registers a callback on new messages and provides a reference object
pub fn (mut s Server) on_message_ref(fun SocketMessageFn2, ref voidptr) {
s.message_callbacks << MessageEventHandler{
handler2: fun
ref: ref
is_ref: true
}
}
// on_close registers a callback on closed socket
pub fn (mut s Server) on_close(fun SocketCloseFn) {
s.close_callbacks << CloseEventHandler{
handler: fun
}
}
// on_close_ref registers a callback on closed socket and provides a reference object
pub fn (mut s Server) on_close_ref(fun SocketCloseFn2, ref voidptr) {
s.close_callbacks << CloseEventHandler{
handler2: fun
ref: ref
is_ref: true
}
}
// on_message registers a callback on new messages
pub fn (mut ws Client) on_message(fun SocketMessageFn) {
ws.message_callbacks << MessageEventHandler{
handler: fun
}
}
// on_message_ref registers a callback on new messages and provides a reference object
pub fn (mut ws Client) on_message_ref(fun SocketMessageFn2, ref voidptr) {
ws.message_callbacks << MessageEventHandler{
handler2: fun
ref: ref
is_ref: true
}
}
// on_error registers a callback on errors
pub fn (mut ws Client) on_error(fun SocketErrorFn) {
ws.error_callbacks << ErrorEventHandler{
handler: fun
}
}
// on_error_ref registers a callback on errors and provides a reference object
pub fn (mut ws Client) on_error_ref(fun SocketErrorFn2, ref voidptr) {
ws.error_callbacks << ErrorEventHandler{
handler2: fun
ref: ref
is_ref: true
}
}
// on_open registers a callback on successful opening the websocket
pub fn (mut ws Client) on_open(fun SocketOpenFn) {
ws.open_callbacks << OpenEventHandler{
handler: fun
}
}
// on_open_ref registers a callback on successful opening the websocket
// and provides a reference object
pub fn (mut ws Client) on_open_ref(fun SocketOpenFn2, ref voidptr) {
ws.open_callbacks << OpenEventHandler{
handler2: fun
ref: ref
is_ref: true
}
}
// on_close registers a callback on closed socket
pub fn (mut ws Client) on_close(fun SocketCloseFn) {
ws.close_callbacks << CloseEventHandler{
handler: fun
}
}
// on_close_ref registers a callback on closed socket and provides a reference object
pub fn (mut ws Client) on_close_ref(fun SocketCloseFn2, ref voidptr) {
ws.close_callbacks << CloseEventHandler{
handler2: fun
ref: ref
is_ref: true
}
}
// send_connect_event invokes the on_connect callback
fn (mut s Server) send_connect_event(mut c ServerClient) ?bool {
if s.accept_client_callbacks.len == 0 {
// If no callback all client will be accepted
return true
}
fun := s.accept_client_callbacks[0]
res := fun(mut c) ?
return res
}
// send_message_event invokes the on_message callback
fn (mut ws Client) send_message_event(msg &Message) {
ws.debug_log('sending on_message event')
for ev_handler in ws.message_callbacks {
if !ev_handler.is_ref {
ev_handler.handler(ws, msg) or { ws.logger.error('send_message_event error: $err') }
} else {
ev_handler.handler2(ws, msg, ev_handler.ref) or {
ws.logger.error('send_message_event error: $err')
}
}
}
}
// send_error_event invokes the on_error callback
fn (mut ws Client) send_error_event(error string) {
ws.debug_log('sending on_error event')
for ev_handler in ws.error_callbacks {
if !ev_handler.is_ref {
ev_handler.handler(mut ws, error) or {
ws.logger.error('send_error_event error: $error, err: $err')
}
} else {
ev_handler.handler2(mut ws, error, ev_handler.ref) or {
ws.logger.error('send_error_event error: $error, err: $err')
}
}
}
}
// send_close_event invokes the on_close callback
fn (mut ws Client) send_close_event(code int, reason string) {
ws.debug_log('sending on_close event')
for ev_handler in ws.close_callbacks {
if !ev_handler.is_ref {
ev_handler.handler(mut ws, code, reason) or {
ws.logger.error('send_close_event error: $err')
}
} else {
ev_handler.handler2(mut ws, code, reason, ev_handler.ref) or {
ws.logger.error('send_close_event error: $err')
}
}
}
}
// send_open_event invokes the on_open callback
fn (mut ws Client) send_open_event() {
ws.debug_log('sending on_open event')
for ev_handler in ws.open_callbacks {
if !ev_handler.is_ref {
ev_handler.handler(mut ws) or { ws.logger.error('send_open_event error: $err') }
} else {
ev_handler.handler2(mut ws, ev_handler.ref) or {
ws.logger.error('send_open_event error: $err')
}
}
}
}

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@ -0,0 +1,185 @@
[manualfree]
module websocket
import encoding.base64
import strings
// handshake manages the websocket handshake process
fn (mut ws Client) handshake() ? {
nonce := get_nonce(ws.nonce_size)
seckey := base64.encode_str(nonce)
mut sb := strings.new_builder(1024)
defer {
unsafe { sb.free() }
}
sb.write_string('GET ')
sb.write_string(ws.uri.resource)
sb.write_string(ws.uri.querystring)
sb.write_string(' HTTP/1.1\r\nHost: ')
sb.write_string(ws.uri.hostname)
sb.write_string(':')
sb.write_string(ws.uri.port)
sb.write_string('\r\nUpgrade: websocket\r\nConnection: Upgrade\r\n')
sb.write_string('Sec-WebSocket-Key: ')
sb.write_string(seckey)
sb.write_string('\r\nSec-WebSocket-Version: 13')
for key in ws.header.keys() {
val := ws.header.custom_values(key).join(',')
sb.write_string('\r\n$key:$val')
}
sb.write_string('\r\n\r\n')
handshake := sb.str()
defer {
unsafe { handshake.free() }
}
handshake_bytes := handshake.bytes()
ws.debug_log('sending handshake: $handshake')
ws.socket_write(handshake_bytes) ?
ws.read_handshake(seckey) ?
unsafe { handshake_bytes.free() }
}
// handle_server_handshake manages websocket server handshake process
fn (mut s Server) handle_server_handshake(mut c Client) ?(string, &ServerClient) {
msg := c.read_handshake_str() ?
handshake_response, client := s.parse_client_handshake(msg, mut c) ?
unsafe { msg.free() }
return handshake_response, client
}
// parse_client_handshake parses result from handshake process
fn (mut s Server) parse_client_handshake(client_handshake string, mut c Client) ?(string, &ServerClient) {
s.logger.debug('server-> client handshake:\n$client_handshake')
lines := client_handshake.split_into_lines()
get_tokens := lines[0].split(' ')
if get_tokens.len < 3 {
return error_with_code('unexpected get operation, $get_tokens', 1)
}
if get_tokens[0].trim_space() != 'GET' {
return error_with_code("unexpected request '${get_tokens[0]}', expected 'GET'",
2)
}
if get_tokens[2].trim_space() != 'HTTP/1.1' {
return error_with_code("unexpected request $get_tokens, expected 'HTTP/1.1'",
3)
}
mut seckey := ''
mut flags := []Flag{}
mut key := ''
for i in 1 .. lines.len {
if lines[i].len <= 0 || lines[i] == '\r\n' {
continue
}
keys := lines[i].split(':')
match keys[0] {
'Upgrade', 'upgrade' {
flags << .has_upgrade
}
'Connection', 'connection' {
flags << .has_connection
}
'Sec-WebSocket-Key', 'sec-websocket-key' {
key = keys[1].trim_space()
s.logger.debug('server-> got key: $key')
seckey = create_key_challenge_response(key) ?
s.logger.debug('server-> challenge: $seckey, response: ${keys[1]}')
flags << .has_accept
}
else {
// we ignore other headers like protocol for now
}
}
unsafe { keys.free() }
}
if flags.len < 3 {
return error_with_code('invalid client handshake, $client_handshake', 4)
}
server_handshake := 'HTTP/1.1 101 Switching Protocols\r\nUpgrade: websocket\r\nConnection: Upgrade\r\nSec-WebSocket-Accept: $seckey\r\n\r\n'
server_client := &ServerClient{
resource_name: get_tokens[1]
client_key: key
client: unsafe { c }
server: unsafe { s }
}
unsafe {
lines.free()
flags.free()
get_tokens.free()
seckey.free()
key.free()
}
return server_handshake, server_client
}
// read_handshake_str returns the handshake response
fn (mut ws Client) read_handshake_str() ?string {
mut total_bytes_read := 0
mut msg := [1024]byte{}
mut buffer := [1]byte{}
for total_bytes_read < 1024 {
bytes_read := ws.socket_read_ptr(&buffer[0], 1) ?
if bytes_read == 0 {
return error_with_code('unexpected no response from handshake', 5)
}
msg[total_bytes_read] = buffer[0]
total_bytes_read++
if total_bytes_read > 5 && msg[total_bytes_read - 1] == `\n`
&& msg[total_bytes_read - 2] == `\r` && msg[total_bytes_read - 3] == `\n`
&& msg[total_bytes_read - 4] == `\r` {
break
}
}
res := msg[..total_bytes_read].bytestr()
return res
}
// read_handshake reads the handshake result and check if valid
fn (mut ws Client) read_handshake(seckey string) ? {
mut msg := ws.read_handshake_str() ?
ws.check_handshake_response(msg, seckey) ?
unsafe { msg.free() }
}
// check_handshake_response checks the response from handshake and returns
// the response and secure key provided by the websocket client
fn (mut ws Client) check_handshake_response(handshake_response string, seckey string) ? {
ws.debug_log('handshake response:\n$handshake_response')
lines := handshake_response.split_into_lines()
header := lines[0]
if !header.starts_with('HTTP/1.1 101') && !header.starts_with('HTTP/1.0 101') {
return error_with_code('handshake_handler: invalid HTTP status response code, $header',
6)
}
for i in 1 .. lines.len {
if lines[i].len <= 0 || lines[i] == '\r\n' {
continue
}
keys := lines[i].split(':')
match keys[0] {
'Upgrade', 'upgrade' {
ws.flags << .has_upgrade
}
'Connection', 'connection' {
ws.flags << .has_connection
}
'Sec-WebSocket-Accept', 'sec-websocket-accept' {
ws.debug_log('seckey: $seckey')
challenge := create_key_challenge_response(seckey) ?
ws.debug_log('challenge: $challenge, response: ${keys[1]}')
if keys[1].trim_space() != challenge {
return error_with_code('handshake_handler: Sec-WebSocket-Accept header does not match computed sha1/base64 response.',
7)
}
ws.flags << .has_accept
unsafe { challenge.free() }
}
else {}
}
unsafe { keys.free() }
}
unsafe { lines.free() }
if ws.flags.len < 3 {
ws.close(1002, 'invalid websocket HTTP headers') ?
return error_with_code('invalid websocket HTTP headers', 8)
}
}

100
vlib/net/websocket/io.v Normal file
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@ -0,0 +1,100 @@
module websocket
import net
import time
// socket_read reads from socket into the provided buffer
fn (mut ws Client) socket_read(mut buffer []byte) ?int {
lock {
if ws.state in [.closed, .closing] || ws.conn.sock.handle <= 1 {
return error('socket_read: trying to read a closed socket')
}
if ws.is_ssl {
r := ws.ssl_conn.read_into(mut buffer) ?
return r
} else {
for {
r := ws.conn.read(mut buffer) or {
if err.code == net.err_timed_out_code {
continue
}
return err
}
return r
}
}
}
return none
}
// socket_read reads from socket into the provided byte pointer and length
fn (mut ws Client) socket_read_ptr(buf_ptr &byte, len int) ?int {
lock {
if ws.state in [.closed, .closing] || ws.conn.sock.handle <= 1 {
return error('socket_read_ptr: trying to read a closed socket')
}
if ws.is_ssl {
r := ws.ssl_conn.socket_read_into_ptr(buf_ptr, len) ?
return r
} else {
for {
r := ws.conn.read_ptr(buf_ptr, len) or {
if err.code == net.err_timed_out_code {
continue
}
return err
}
return r
}
}
}
return none
}
// socket_write writes the provided byte array to the socket
fn (mut ws Client) socket_write(bytes []byte) ?int {
lock {
if ws.state == .closed || ws.conn.sock.handle <= 1 {
ws.debug_log('socket_write: Socket allready closed')
return error('socket_write: trying to write on a closed socket')
}
if ws.is_ssl {
return ws.ssl_conn.write(bytes)
} else {
for {
n := ws.conn.write(bytes) or {
if err.code == net.err_timed_out_code {
continue
}
return err
}
return n
}
panic('reached unreachable code')
}
}
}
// shutdown_socket shuts down the socket properly when connection is closed
fn (mut ws Client) shutdown_socket() ? {
ws.debug_log('shutting down socket')
if ws.is_ssl {
ws.ssl_conn.shutdown() ?
} else {
ws.conn.close() ?
}
}
// dial_socket connects tcp socket and initializes default configurations
fn (mut ws Client) dial_socket() ?&net.TcpConn {
tcp_address := '$ws.uri.hostname:$ws.uri.port'
mut t := net.dial_tcp(tcp_address) ?
optval := int(1)
t.sock.set_option_int(.keep_alive, optval) ?
t.set_read_timeout(30 * time.second)
t.set_write_timeout(30 * time.second)
if ws.is_ssl {
ws.ssl_conn.connect(mut t, ws.uri.hostname) ?
}
return t
}

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@ -0,0 +1,295 @@
module websocket
import encoding.utf8
const (
header_len_offset = 2 // offset for lengthpart of websocket header
buffer_size = 256 // default buffer size
extended_payload16_end_byte = 4 // header length with 16-bit extended payload
extended_payload64_end_byte = 10 // header length with 64-bit extended payload
)
// Fragment represents a websocket data fragment
struct Fragment {
data []byte // included data payload data in a fragment
opcode OPCode // interpretation of the payload data
}
// Frame represents a data frame header
struct Frame {
mut:
// length of the websocket header part
header_len int = 2
// size of total frame
frame_size int = 2
fin bool // true if final fragment of message
rsv1 bool // reserved for future use in websocket RFC
rsv2 bool // reserved for future use in websocket RFC
rsv3 bool // reserved for future use in websocket RFC
opcode OPCode // interpretation of the payload data
has_mask bool // true if the payload data is masked
payload_len int // payload length
masking_key [4]byte // all frames from client to server is masked with this key
}
const (
invalid_close_codes = [999, 1004, 1005, 1006, 1014, 1015, 1016, 1100, 2000, 2999, 5000, 65536]
)
// validate_client validates client frame rules from RFC6455
pub fn (mut ws Client) validate_frame(frame &Frame) ? {
if frame.rsv1 || frame.rsv2 || frame.rsv3 {
ws.close(1002, 'rsv cannot be other than 0, not negotiated') ?
return error('rsv cannot be other than 0, not negotiated')
}
if (int(frame.opcode) >= 3 && int(frame.opcode) <= 7)
|| (int(frame.opcode) >= 11 && int(frame.opcode) <= 15) {
ws.close(1002, 'use of reserved opcode') ?
return error('use of reserved opcode')
}
if frame.has_mask && !ws.is_server {
// server should never send masked frames
// to client, close connection
ws.close(1002, 'client got masked frame') ?
return error('client sent masked frame')
}
if is_control_frame(frame.opcode) {
if !frame.fin {
ws.close(1002, 'control message must not be fragmented') ?
return error('unexpected control frame with no fin')
}
if frame.payload_len > 125 {
ws.close(1002, 'control frames must not exceed 125 bytes') ?
return error('unexpected control frame payload length')
}
}
if frame.fin == false && ws.fragments.len == 0 && frame.opcode == .continuation {
err_msg := 'unexecpected continuation, there are no frames to continue, $frame'
ws.close(1002, err_msg) ?
return error(err_msg)
}
}
// is_control_frame returns true if the frame is a control frame
fn is_control_frame(opcode OPCode) bool {
return opcode !in [.text_frame, .binary_frame, .continuation]
}
// is_data_frame returns true if the frame is a control frame
fn is_data_frame(opcode OPCode) bool {
return opcode in [.text_frame, .binary_frame]
}
// read_payload reads the message payload from the socket
fn (mut ws Client) read_payload(frame &Frame) ?[]byte {
if frame.payload_len == 0 {
return []byte{}
}
mut buffer := []byte{cap: frame.payload_len}
mut read_buf := [1]byte{}
mut bytes_read := 0
for bytes_read < frame.payload_len {
len := ws.socket_read_ptr(&read_buf[0], 1) ?
if len != 1 {
return error('expected read all message, got zero')
}
bytes_read += len
buffer << read_buf[0]
}
if bytes_read != frame.payload_len {
return error('failed to read payload')
}
if frame.has_mask {
for i in 0 .. frame.payload_len {
buffer[i] ^= frame.masking_key[i % 4] & 0xff
}
}
return buffer
}
// validate_utf_8 validates payload for valid utf8 encoding
// - Future implementation needs to support fail fast utf errors for strict autobahn conformance
fn (mut ws Client) validate_utf_8(opcode OPCode, payload []byte) ? {
if opcode in [.text_frame, .close] && !utf8.validate(payload.data, payload.len) {
ws.logger.error('malformed utf8 payload, payload len: ($payload.len)')
ws.send_error_event('Recieved malformed utf8.')
ws.close(1007, 'malformed utf8 payload') ?
return error('malformed utf8 payload')
}
}
// read_next_message reads 1 to n frames to compose a message
pub fn (mut ws Client) read_next_message() ?Message {
for {
frame := ws.parse_frame_header() ?
ws.validate_frame(&frame) ?
frame_payload := ws.read_payload(&frame) ?
if is_control_frame(frame.opcode) {
// Control frames can interject other frames
// and need to be returned immediately
msg := Message{
opcode: OPCode(frame.opcode)
payload: frame_payload.clone()
}
unsafe { frame_payload.free() }
return msg
}
// if the message is fragmented we just put it on fragments
// a fragment is allowed to have zero size payload
if !frame.fin {
ws.fragments << &Fragment{
data: frame_payload.clone()
opcode: frame.opcode
}
unsafe { frame_payload.free() }
continue
}
if ws.fragments.len == 0 {
ws.validate_utf_8(frame.opcode, frame_payload) or {
ws.logger.error('UTF8 validation error: $err, len of payload($frame_payload.len)')
ws.send_error_event('UTF8 validation error: $err, len of payload($frame_payload.len)')
return err
}
msg := Message{
opcode: OPCode(frame.opcode)
payload: frame_payload.clone()
}
unsafe { frame_payload.free() }
return msg
}
defer {
ws.fragments = []
}
if is_data_frame(frame.opcode) {
ws.close(0, '') ?
return error('Unexpected frame opcode')
}
payload := ws.payload_from_fragments(frame_payload) ?
opcode := ws.opcode_from_fragments()
ws.validate_utf_8(opcode, payload) ?
msg := Message{
opcode: opcode
payload: payload.clone()
}
unsafe {
frame_payload.free()
payload.free()
}
return msg
}
return none
}
// payload_from_fragments returs the whole paylaod from fragmented message
fn (ws Client) payload_from_fragments(fin_payload []byte) ?[]byte {
mut total_size := 0
for f in ws.fragments {
if f.data.len > 0 {
total_size += f.data.len
}
}
total_size += fin_payload.len
if total_size == 0 {
return []byte{}
}
mut total_buffer := []byte{cap: total_size}
for f in ws.fragments {
if f.data.len > 0 {
total_buffer << f.data
}
}
total_buffer << fin_payload
return total_buffer
}
// opcode_from_fragments returns the opcode for message from the first fragment sent
fn (ws Client) opcode_from_fragments() OPCode {
return OPCode(ws.fragments[0].opcode)
}
// parse_frame_header parses next message by decoding the incoming frames
pub fn (mut ws Client) parse_frame_header() ?Frame {
mut buffer := [256]byte{}
mut bytes_read := 0
mut frame := Frame{}
mut rbuff := [1]byte{}
mut mask_end_byte := 0
for ws.state == .open {
read_bytes := ws.socket_read_ptr(&rbuff[0], 1) ?
if read_bytes == 0 {
// this is probably a timeout or close
continue
}
buffer[bytes_read] = rbuff[0]
bytes_read++
// parses the first two header bytes to get basic frame information
if bytes_read == u64(websocket.header_len_offset) {
frame.fin = (buffer[0] & 0x80) == 0x80
frame.rsv1 = (buffer[0] & 0x40) == 0x40
frame.rsv2 = (buffer[0] & 0x20) == 0x20
frame.rsv3 = (buffer[0] & 0x10) == 0x10
frame.opcode = OPCode(int(buffer[0] & 0x7F))
frame.has_mask = (buffer[1] & 0x80) == 0x80
frame.payload_len = buffer[1] & 0x7F
// if has mask set the byte postition where mask ends
if frame.has_mask {
mask_end_byte = if frame.payload_len < 126 {
websocket.header_len_offset + 4
} else if frame.payload_len == 126 {
websocket.header_len_offset + 6
} else if frame.payload_len == 127 {
websocket.header_len_offset + 12
} else {
0
} // impossible
}
frame.payload_len = frame.payload_len
frame.frame_size = frame.header_len + frame.payload_len
if !frame.has_mask && frame.payload_len < 126 {
break
}
}
if frame.payload_len == 126 && bytes_read == u64(websocket.extended_payload16_end_byte) {
frame.header_len += 2
frame.payload_len = 0
frame.payload_len |= buffer[2] << 8
frame.payload_len |= buffer[3]
frame.frame_size = frame.header_len + frame.payload_len
if !frame.has_mask {
break
}
}
if frame.payload_len == 127 && bytes_read == u64(websocket.extended_payload64_end_byte) {
frame.header_len += 8
// these shift operators needs 64 bit on clang with -prod flag
mut payload_len := u64(0)
payload_len |= u64(buffer[2]) << 56
payload_len |= u64(buffer[3]) << 48
payload_len |= u64(buffer[4]) << 40
payload_len |= u64(buffer[5]) << 32
payload_len |= u64(buffer[6]) << 24
payload_len |= u64(buffer[7]) << 16
payload_len |= u64(buffer[8]) << 8
payload_len |= u64(buffer[9])
frame.payload_len = int(payload_len)
if !frame.has_mask {
break
}
}
if frame.has_mask && bytes_read == mask_end_byte {
frame.masking_key[0] = buffer[mask_end_byte - 4]
frame.masking_key[1] = buffer[mask_end_byte - 3]
frame.masking_key[2] = buffer[mask_end_byte - 2]
frame.masking_key[3] = buffer[mask_end_byte - 1]
break
}
}
return frame
}
// unmask_sequence unmask any given sequence
fn (f Frame) unmask_sequence(mut buffer []byte) {
for i in 0 .. buffer.len {
buffer[i] ^= f.masking_key[i % 4] & 0xff
}
}

View File

@ -1,7 +1,7 @@
// use this test to test the websocket client in the autobahn test
module main
import x.websocket
import net.websocket
fn main() {
for i in 1 .. 304 {

View File

@ -1,7 +1,7 @@
// use this test to test the websocket client in the autobahn test
module main
import x.websocket
import net.websocket
fn main() {
for i in 1 .. 304 {

View File

@ -1,7 +1,7 @@
// use this to test websocket server to the autobahn test
module main
import x.websocket
import net.websocket
fn main() {
mut s := websocket.new_server(.ip6, 9002, '/')

View File

@ -17,5 +17,5 @@ services:
client:
container_name: autobahn_client
build:
dockerfile: vlib/x/websocket/tests/autobahn/ws_test/Dockerfile
dockerfile: vlib/net/websocket/tests/autobahn/ws_test/Dockerfile
context: ../../../../../

View File

@ -1,7 +1,7 @@
// use this test to test the websocket client in the autobahn test
module main
import x.websocket
import net.websocket
fn main() {
for i in 1 .. 304 {

View File

@ -1,7 +1,7 @@
// use this test to test the websocket client in the autobahn test
module main
import x.websocket
import net.websocket
fn main() {
for i in 1 .. 304 {

View File

@ -0,0 +1,12 @@
FROM thevlang/vlang:buster-build
COPY ./ /src/
WORKDIR /src
RUN make CC=clang
RUN /src/v /src/vlib/net/websocket/tests/autobahn/autobahn_server.v
RUN chmod +x /src/vlib/net/websocket/tests/autobahn/autobahn_server
ENTRYPOINT [ "/src/vlib/net/websocket/tests/autobahn/autobahn_server" ]

16
vlib/net/websocket/uri.v Normal file
View File

@ -0,0 +1,16 @@
module websocket
// Uri represents an Uri for websocket connections
struct Uri {
mut:
url string // url to the websocket endpoint
hostname string // hostname of the websocket endpoint
port string // port of the websocket endpoint
resource string // resource of the websocket endpoint
querystring string // query string of the websocket endpoint
}
// str returns the string representation of the Uri
pub fn (u Uri) str() string {
return u.url
}

View File

@ -0,0 +1,54 @@
module websocket
import rand
import crypto.sha1
import encoding.base64
// htonl64 converts payload length to header bits
fn htonl64(payload_len u64) []byte {
mut ret := []byte{len: 8}
ret[0] = byte(((payload_len & (u64(0xff) << 56)) >> 56) & 0xff)
ret[1] = byte(((payload_len & (u64(0xff) << 48)) >> 48) & 0xff)
ret[2] = byte(((payload_len & (u64(0xff) << 40)) >> 40) & 0xff)
ret[3] = byte(((payload_len & (u64(0xff) << 32)) >> 32) & 0xff)
ret[4] = byte(((payload_len & (u64(0xff) << 24)) >> 24) & 0xff)
ret[5] = byte(((payload_len & (u64(0xff) << 16)) >> 16) & 0xff)
ret[6] = byte(((payload_len & (u64(0xff) << 8)) >> 8) & 0xff)
ret[7] = byte(((payload_len & (u64(0xff) << 0)) >> 0) & 0xff)
return ret
}
// create_masking_key returs a new masking key to use when masking websocket messages
fn create_masking_key() []byte {
mask_bit := byte(rand.intn(255))
buf := []byte{len: 4, init: `0`}
unsafe { C.memcpy(buf.data, &mask_bit, 4) }
return buf
}
// create_key_challenge_response creates a key challange response from security key
fn create_key_challenge_response(seckey string) ?string {
if seckey.len == 0 {
return error('unexpected seckey lengt zero')
}
guid := '258EAFA5-E914-47DA-95CA-C5AB0DC85B11'
sha1buf := seckey + guid
shabytes := sha1buf.bytes()
hash := sha1.sum(shabytes)
b64 := base64.encode(hash)
unsafe {
hash.free()
shabytes.free()
}
return b64
}
// get_nonce creates a randomized array used in handshake process
fn get_nonce(nonce_size int) string {
mut nonce := []byte{len: nonce_size, cap: nonce_size}
alphanum := '0123456789ABCDEFGHIJKLMNOPQRSTUVXYZabcdefghijklmnopqrstuvwxyz'
for i in 0 .. nonce_size {
nonce[i] = alphanum[rand.intn(alphanum.len)]
}
return unsafe { tos(nonce.data, nonce.len) }.clone()
}

View File

@ -0,0 +1,494 @@
// websocket module implements websocket client and a websocket server
// attribution: @thecoderr the author of original websocket client
[manualfree]
module websocket
import net
import net.http
import net.openssl
import net.urllib
import time
import log
import rand
const (
empty_bytearr = []byte{} // used as empty response to avoid allocation
)
// Client represents websocket client
pub struct Client {
is_server bool
mut:
ssl_conn &openssl.SSLConn // secure connection used when wss is used
flags []Flag // flags used in handshake
fragments []Fragment // current fragments
message_callbacks []MessageEventHandler // all callbacks on_message
error_callbacks []ErrorEventHandler // all callbacks on_error
open_callbacks []OpenEventHandler // all callbacks on_open
close_callbacks []CloseEventHandler // all callbacks on_close
pub:
is_ssl bool // true if secure socket is used
uri Uri // uri of current connection
id string // unique id of client
pub mut:
header http.Header // headers that will be passed when connecting
conn &net.TcpConn // underlying TCP socket connection
nonce_size int = 16 // size of nounce used for masking
panic_on_callback bool // set to true of callbacks can panic
state State // current state of connection
logger &log.Log // logger used to log messages
resource_name string // name of current resource
last_pong_ut u64 // last time in unix time we got a pong message
}
// Flag represents different types of headers in websocket handshake
enum Flag {
has_accept // Webs
has_connection
has_upgrade
}
// State represents the state of the websocket connection.
pub enum State {
connecting = 0
open
closing
closed
}
// Message represents a whole message combined from 1 to n frames
pub struct Message {
pub:
opcode OPCode // websocket frame type of this message
payload []byte // payload of the message
}
// OPCode represents the supported websocket frame types
pub enum OPCode {
continuation = 0x00
text_frame = 0x01
binary_frame = 0x02
close = 0x08
ping = 0x09
pong = 0x0A
}
// new_client instance a new websocket client
pub fn new_client(address string) ?&Client {
uri := parse_uri(address) ?
return &Client{
conn: 0
is_server: false
ssl_conn: openssl.new_ssl_conn()
is_ssl: address.starts_with('wss')
logger: &log.Log{
level: .info
}
uri: uri
state: .closed
id: rand.uuid_v4()
header: http.new_header()
}
}
// connect connects to remote websocket server
pub fn (mut ws Client) connect() ? {
ws.assert_not_connected() ?
ws.set_state(.connecting)
ws.logger.info('connecting to host $ws.uri')
ws.conn = ws.dial_socket() ?
// Todo: make setting configurable
ws.conn.set_read_timeout(time.second * 30)
ws.conn.set_write_timeout(time.second * 30)
ws.handshake() ?
ws.set_state(.open)
ws.logger.info('successfully connected to host $ws.uri')
ws.send_open_event()
}
// listen listens and processes incoming messages
pub fn (mut ws Client) listen() ? {
mut log := 'Starting client listener, server($ws.is_server)...'
ws.logger.info(log)
unsafe { log.free() }
defer {
ws.logger.info('Quit client listener, server($ws.is_server)...')
if ws.state == .open {
ws.close(1000, 'closed by client') or {}
}
}
for ws.state == .open {
msg := ws.read_next_message() or {
if ws.state in [.closed, .closing] {
return
}
ws.debug_log('failed to read next message: $err')
ws.send_error_event('failed to read next message: $err')
return err
}
if ws.state in [.closed, .closing] {
return
}
ws.debug_log('got message: $msg.opcode')
match msg.opcode {
.text_frame {
log = 'read: text'
ws.debug_log(log)
unsafe { log.free() }
ws.send_message_event(msg)
unsafe { msg.free() }
}
.binary_frame {
ws.debug_log('read: binary')
ws.send_message_event(msg)
unsafe { msg.free() }
}
.ping {
ws.debug_log('read: ping, sending pong')
ws.send_control_frame(.pong, 'PONG', msg.payload) or {
ws.logger.error('error in message callback sending PONG: $err')
ws.send_error_event('error in message callback sending PONG: $err')
if ws.panic_on_callback {
panic(err)
}
continue
}
if msg.payload.len > 0 {
unsafe { msg.free() }
}
}
.pong {
ws.debug_log('read: pong')
ws.last_pong_ut = time.now().unix
ws.send_message_event(msg)
if msg.payload.len > 0 {
unsafe { msg.free() }
}
}
.close {
log = 'read: close'
ws.debug_log(log)
unsafe { log.free() }
defer {
ws.manage_clean_close()
}
if msg.payload.len > 0 {
if msg.payload.len == 1 {
ws.close(1002, 'close payload cannot be 1 byte') ?
return error('close payload cannot be 1 byte')
}
code := (int(msg.payload[0]) << 8) + int(msg.payload[1])
if code in invalid_close_codes {
ws.close(1002, 'invalid close code: $code') ?
return error('invalid close code: $code')
}
reason := if msg.payload.len > 2 { msg.payload[2..] } else { []byte{} }
if reason.len > 0 {
ws.validate_utf_8(.close, reason) ?
}
if ws.state !in [.closing, .closed] {
// sending close back according to spec
ws.debug_log('close with reason, code: $code, reason: $reason')
r := reason.bytestr()
ws.close(code, r) ?
}
unsafe { msg.free() }
} else {
if ws.state !in [.closing, .closed] {
ws.debug_log('close with reason, no code')
// sending close back according to spec
ws.close(1000, 'normal') ?
}
unsafe { msg.free() }
}
return
}
.continuation {
ws.logger.error('unexpected opcode continuation, nothing to continue')
ws.send_error_event('unexpected opcode continuation, nothing to continue')
ws.close(1002, 'nothing to continue') ?
return error('unexpected opcode continuation, nothing to continue')
}
}
}
}
// manage_clean_close closes connection in a clean websocket way
fn (mut ws Client) manage_clean_close() {
ws.send_close_event(1000, 'closed by client')
}
// ping sends ping message to server
pub fn (mut ws Client) ping() ? {
ws.send_control_frame(.ping, 'PING', []) ?
}
// pong sends pong message to server,
pub fn (mut ws Client) pong() ? {
ws.send_control_frame(.pong, 'PONG', []) ?
}
// write_ptr writes len bytes provided a byteptr with a websocket messagetype
pub fn (mut ws Client) write_ptr(bytes &byte, payload_len int, code OPCode) ?int {
// ws.debug_log('write_ptr code: $code')
if ws.state != .open || ws.conn.sock.handle < 1 {
// todo: send error here later
return error('trying to write on a closed socket!')
}
mut header_len := 2 + if payload_len > 125 { 2 } else { 0 } +
if payload_len > 0xffff { 6 } else { 0 }
if !ws.is_server {
header_len += 4
}
mut header := []byte{len: header_len, init: `0`} // [`0`].repeat(header_len)
header[0] = byte(int(code)) | 0x80
masking_key := create_masking_key()
if ws.is_server {
if payload_len <= 125 {
header[1] = byte(payload_len)
} else if payload_len > 125 && payload_len <= 0xffff {
len16 := C.htons(payload_len)
header[1] = 126
unsafe { C.memcpy(&header[2], &len16, 2) }
} else if payload_len > 0xffff && payload_len <= 0x7fffffff {
len_bytes := htonl64(u64(payload_len))
header[1] = 127
unsafe { C.memcpy(&header[2], len_bytes.data, 8) }
}
} else {
if payload_len <= 125 {
header[1] = byte(payload_len | 0x80)
header[2] = masking_key[0]
header[3] = masking_key[1]
header[4] = masking_key[2]
header[5] = masking_key[3]
} else if payload_len > 125 && payload_len <= 0xffff {
len16 := C.htons(payload_len)
header[1] = (126 | 0x80)
unsafe { C.memcpy(&header[2], &len16, 2) }
header[4] = masking_key[0]
header[5] = masking_key[1]
header[6] = masking_key[2]
header[7] = masking_key[3]
} else if payload_len > 0xffff && payload_len <= 0x7fffffff {
len64 := htonl64(u64(payload_len))
header[1] = (127 | 0x80)
unsafe { C.memcpy(&header[2], len64.data, 8) }
header[10] = masking_key[0]
header[11] = masking_key[1]
header[12] = masking_key[2]
header[13] = masking_key[3]
} else {
ws.close(1009, 'frame too large') ?
return error('frame too large')
}
}
len := header.len + payload_len
mut frame_buf := []byte{len: len}
unsafe {
C.memcpy(&frame_buf[0], &byte(header.data), header.len)
if payload_len > 0 {
C.memcpy(&frame_buf[header.len], bytes, payload_len)
}
}
if !ws.is_server {
for i in 0 .. payload_len {
frame_buf[header_len + i] ^= masking_key[i % 4] & 0xff
}
}
written_len := ws.socket_write(frame_buf) ?
unsafe {
frame_buf.free()
masking_key.free()
header.free()
}
return written_len
}
// write writes a byte array with a websocket messagetype to socket
pub fn (mut ws Client) write(bytes []byte, code OPCode) ?int {
return ws.write_ptr(&byte(bytes.data), bytes.len, code)
}
// write_string, writes a string with a websocket texttype to socket
[deprecated: 'use Client.write_string() instead']
pub fn (mut ws Client) write_str(str string) ?int {
return ws.write_string(str)
}
// write_str, writes a string with a websocket texttype to socket
pub fn (mut ws Client) write_string(str string) ?int {
return ws.write_ptr(str.str, str.len, .text_frame)
}
// close closes the websocket connection
pub fn (mut ws Client) close(code int, message string) ? {
ws.debug_log('sending close, $code, $message')
if ws.state in [.closed, .closing] || ws.conn.sock.handle <= 1 {
ws.debug_log('close: Websocket allready closed ($ws.state), $message, $code handle($ws.conn.sock.handle)')
err_msg := 'Socket allready closed: $code'
return error(err_msg)
}
defer {
ws.shutdown_socket() or {}
ws.reset_state()
}
ws.set_state(.closing)
// mut code32 := 0
if code > 0 {
code_ := C.htons(code)
message_len := message.len + 2
mut close_frame := []byte{len: message_len}
close_frame[0] = byte(code_ & 0xFF)
close_frame[1] = byte(code_ >> 8)
// code32 = (close_frame[0] << 8) + close_frame[1]
for i in 0 .. message.len {
close_frame[i + 2] = message[i]
}
ws.send_control_frame(.close, 'CLOSE', close_frame) ?
unsafe { close_frame.free() }
} else {
ws.send_control_frame(.close, 'CLOSE', []) ?
}
ws.fragments = []
}
// send_control_frame sends a control frame to the server
fn (mut ws Client) send_control_frame(code OPCode, frame_typ string, payload []byte) ? {
ws.debug_log('send control frame $code, frame_type: $frame_typ')
if ws.state !in [.open, .closing] && ws.conn.sock.handle > 1 {
return error('socket is not connected')
}
header_len := if ws.is_server { 2 } else { 6 }
frame_len := header_len + payload.len
mut control_frame := []byte{len: frame_len}
mut masking_key := if !ws.is_server { create_masking_key() } else { websocket.empty_bytearr }
defer {
unsafe {
control_frame.free()
if masking_key.len > 0 {
masking_key.free()
}
}
}
control_frame[0] = byte(int(code) | 0x80)
if !ws.is_server {
control_frame[1] = byte(payload.len | 0x80)
control_frame[2] = masking_key[0]
control_frame[3] = masking_key[1]
control_frame[4] = masking_key[2]
control_frame[5] = masking_key[3]
} else {
control_frame[1] = byte(payload.len)
}
if code == .close {
if payload.len >= 2 {
if !ws.is_server {
mut parsed_payload := []byte{len: payload.len + 1}
unsafe { C.memcpy(parsed_payload.data, &payload[0], payload.len) }
parsed_payload[payload.len] = `\0`
for i in 0 .. payload.len {
control_frame[6 + i] = (parsed_payload[i] ^ masking_key[i % 4]) & 0xff
}
unsafe { parsed_payload.free() }
} else {
unsafe { C.memcpy(&control_frame[2], &payload[0], payload.len) }
}
}
} else {
if !ws.is_server {
if payload.len > 0 {
for i in 0 .. payload.len {
control_frame[header_len + i] = (payload[i] ^ masking_key[i % 4]) & 0xff
}
}
} else {
if payload.len > 0 {
unsafe { C.memcpy(&control_frame[2], &payload[0], payload.len) }
}
}
}
ws.socket_write(control_frame) or {
return error('send_control_frame: error sending $frame_typ control frame.')
}
}
// parse_uri parses the url to a Uri
fn parse_uri(url string) ?&Uri {
u := urllib.parse(url) ?
request_uri := u.request_uri()
v := request_uri.split('?')
mut port := u.port()
uri := u.str()
if port == '' {
port = if uri.starts_with('ws://') {
'80'
} else if uri.starts_with('wss://') {
'443'
} else {
u.port()
}
}
querystring := if v.len > 1 { '?' + v[1] } else { '' }
return &Uri{
url: url
hostname: u.hostname()
port: port
resource: v[0]
querystring: querystring
}
}
// set_state sets current state of the websocket connection
fn (mut ws Client) set_state(state State) {
lock {
ws.state = state
}
}
// assert_not_connected returns error if the connection is not connected
fn (ws Client) assert_not_connected() ? {
match ws.state {
.connecting { return error('connect: websocket is connecting') }
.open { return error('connect: websocket already open') }
.closing { return error('connect: reconnect on closing websocket not supported, please use new client') }
else {}
}
}
// reset_state resets the websocket and initialize default settings
fn (mut ws Client) reset_state() {
lock {
ws.state = .closed
ws.ssl_conn = openssl.new_ssl_conn()
ws.flags = []
ws.fragments = []
}
}
// debug_log handles debug logging output for client and server
fn (mut ws Client) debug_log(text string) {
if ws.is_server {
ws.logger.debug('server-> $text')
} else {
ws.logger.debug('client-> $text')
}
}
// free handles manual free memory of Message struct
pub fn (m &Message) free() {
unsafe { m.payload.free() }
}
// free handles manual free memory of Client struct
pub fn (c &Client) free() {
unsafe {
c.flags.free()
c.fragments.free()
c.message_callbacks.free()
c.error_callbacks.free()
c.open_callbacks.free()
c.close_callbacks.free()
c.header.free()
}
}

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@ -0,0 +1,10 @@
module websocket
// error_code returns the error code
fn error_code() int {
return C.errno
}
const (
error_ewouldblock = C.EWOULDBLOCK // blocking error code
)

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@ -0,0 +1,189 @@
module websocket
import net
import net.openssl
import log
import time
import rand
// Server represents a websocket server connection
pub struct Server {
mut:
logger &log.Log // logger used to log
ls &net.TcpListener // listener used to get incoming connection to socket
accept_client_callbacks []AcceptClientFn // accept client callback functions
message_callbacks []MessageEventHandler // new message callback functions
close_callbacks []CloseEventHandler // close message callback functions
pub:
family net.AddrFamily = .ip
port int // port used as listen to incoming connections
is_ssl bool // true if secure connection (not supported yet on server)
pub mut:
clients map[string]&ServerClient // clients connected to this server
ping_interval int = 30 // interval for sending ping to clients (seconds)
state State // current state of connection
}
// ServerClient represents a connected client
struct ServerClient {
pub:
resource_name string // resource that the client access
client_key string // unique key of client
pub mut:
server &Server
client &Client
}
// new_server instance a new websocket server on provided port and route
pub fn new_server(family net.AddrFamily, port int, route string) &Server {
return &Server{
ls: 0
family: family
port: port
logger: &log.Log{
level: .info
}
state: .closed
}
}
// set_ping_interval sets the interval that the server will send ping messages to clients
pub fn (mut s Server) set_ping_interval(seconds int) {
s.ping_interval = seconds
}
// listen start listen and process to incoming connections from websocket clients
pub fn (mut s Server) listen() ? {
s.logger.info('websocket server: start listen on port $s.port')
s.ls = net.listen_tcp(s.family, ':$s.port') ?
s.set_state(.open)
go s.handle_ping()
for {
mut c := s.accept_new_client() or { continue }
go s.serve_client(mut c)
}
s.logger.info('websocket server: end listen on port $s.port')
}
// Close closes server (not implemented yet)
fn (mut s Server) close() {
// TODO: implement close when moving to net from x.net
}
// handle_ping sends ping to all clients every set interval
fn (mut s Server) handle_ping() {
mut clients_to_remove := []string{}
for s.state == .open {
time.sleep(s.ping_interval * time.second)
for i, _ in s.clients {
mut c := s.clients[i]
if c.client.state == .open {
c.client.ping() or {
s.logger.debug('server-> error sending ping to client')
c.client.close(1002, 'Closing connection: ping send error') or {
// we want to continue even if error
continue
}
clients_to_remove << c.client.id
}
if (time.now().unix - c.client.last_pong_ut) > s.ping_interval * 2 {
clients_to_remove << c.client.id
c.client.close(1000, 'no pong received') or { continue }
}
}
}
// TODO: replace for with s.clients.delete_all(clients_to_remove) if (https://github.com/vlang/v/pull/6020) merges
for client in clients_to_remove {
lock {
s.clients.delete(client)
}
}
clients_to_remove.clear()
}
}
// serve_client accepts incoming connection and sets up the callbacks
fn (mut s Server) serve_client(mut c Client) ? {
c.logger.debug('server-> Start serve client ($c.id)')
defer {
c.logger.debug('server-> End serve client ($c.id)')
}
mut handshake_response, mut server_client := s.handle_server_handshake(mut c) ?
accept := s.send_connect_event(mut server_client) ?
if !accept {
s.logger.debug('server-> client not accepted')
c.shutdown_socket() ?
return
}
// the client is accepted
c.socket_write(handshake_response.bytes()) ?
lock {
s.clients[server_client.client.id] = server_client
}
s.setup_callbacks(mut server_client)
c.listen() or {
s.logger.error(err.msg)
return err
}
}
// setup_callbacks initialize all callback functions
fn (mut s Server) setup_callbacks(mut sc ServerClient) {
if s.message_callbacks.len > 0 {
for cb in s.message_callbacks {
if cb.is_ref {
sc.client.on_message_ref(cb.handler2, cb.ref)
} else {
sc.client.on_message(cb.handler)
}
}
}
if s.close_callbacks.len > 0 {
for cb in s.close_callbacks {
if cb.is_ref {
sc.client.on_close_ref(cb.handler2, cb.ref)
} else {
sc.client.on_close(cb.handler)
}
}
}
// set standard close so we can remove client if closed
sc.client.on_close_ref(fn (mut c Client, code int, reason string, mut sc ServerClient) ? {
c.logger.debug('server-> Delete client')
lock {
sc.server.clients.delete(sc.client.id)
}
}, sc)
}
// accept_new_client creates a new client instance for client that connects to the socket
fn (mut s Server) accept_new_client() ?&Client {
mut new_conn := s.ls.accept() ?
c := &Client{
is_server: true
conn: new_conn
ssl_conn: openssl.new_ssl_conn()
logger: s.logger
state: .open
last_pong_ut: time.now().unix
id: rand.uuid_v4()
}
return c
}
// set_state sets current state in a thread safe way
fn (mut s Server) set_state(state State) {
lock {
s.state = state
}
}
// free manages manual free of memory for Server instance
pub fn (mut s Server) free() {
unsafe {
s.clients.free()
s.accept_client_callbacks.free()
s.message_callbacks.free()
s.close_callbacks.free()
}
}

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@ -1,6 +1,6 @@
import os
import net
import x.websocket
import net.websocket
import time
import rand

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@ -0,0 +1,12 @@
module websocket
import net
// error_code returns the error code
fn error_code() int {
return C.WSAGetLastError()
}
const (
error_ewouldblock = net.WsaError.wsaewouldblock // blocking error code
)

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@ -1,25 +0,0 @@
module openssl
import time
enum Select {
read
write
except
}
pub struct SSLConn {
mut:
sslctx &C.SSL_CTX
ssl &C.SSL
handle int
duration time.Duration
}
pub fn new_ssl_conn() &SSLConn {
return &SSLConn{
sslctx: 0
ssl: 0
handle: 0
}
}

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@ -1,12 +0,0 @@
FROM thevlang/vlang:buster-build
COPY ./ /src/
WORKDIR /src
RUN make CC=clang
RUN /src/v /src/vlib/x/websocket/tests/autobahn/autobahn_server.v
RUN chmod +x /src/vlib/x/websocket/tests/autobahn/autobahn_server
ENTRYPOINT [ "/src/vlib/x/websocket/tests/autobahn/autobahn_server" ]

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@ -1,11 +1,13 @@
// websocket module implements websocket client and a websocket server
// attribution: @thecoderr the author of original websocket client
// advice that the implementation is deprecated and moved to the net.websocket module!
// it will be removed in later versions
[manualfree]
module websocket
import net
import net.http
import x.openssl
import net.openssl
import net.urllib
import time
import log
@ -74,6 +76,7 @@ pub enum OPCode {
}
// new_client instance a new websocket client
[deprecated: 'use net.websocket module instead']
pub fn new_client(address string) ?&Client {
uri := parse_uri(address) ?
return &Client{

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@ -1,7 +1,7 @@
module websocket
import net
import x.openssl
import net.openssl
import log
import time
import rand
@ -35,6 +35,7 @@ pub mut:
}
// new_server instance a new websocket server on provided port and route
[deprecated: 'use net.websocket module instead']
pub fn new_server(family net.AddrFamily, port int, route string) &Server {
return &Server{
ls: 0