74 lines
1.9 KiB
V
74 lines
1.9 KiB
V
module websocket
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fn (mut ws Client) read_handshake(seckey string) {
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l.d('reading handshake...')
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mut bytes_read := 0
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max_buffer := 1024
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buffer_size := 1
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mut buffer := malloc(max_buffer)
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for bytes_read <= max_buffer {
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res := ws.read_from_server(buffer + bytes_read, buffer_size)
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if res == 0 || res == -1 {
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l.f('read_handshake: Failed to read handshake.')
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}
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if buffer[bytes_read] == `\n` && buffer[bytes_read - 1] == `\r` && buffer[bytes_read -
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2] == `\n` && buffer[bytes_read - 3] == `\r` {
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break
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}
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bytes_read += buffer_size
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}
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buffer[max_buffer + 1] = `\0`
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ws.handshake_handler(string(byteptr(buffer)), seckey)
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}
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fn (mut ws Client) handshake_handler(handshake_response, seckey string) {
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l.d('handshake_handler:\r\n${handshake_response}')
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lines := handshake_response.split_into_lines()
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header := lines[0]
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if !header.starts_with('HTTP/1.1 101') && !header.starts_with('HTTP/1.0 101') {
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l.f('handshake_handler: invalid HTTP status response code')
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}
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for i in 1 .. lines.len {
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if lines[i].len <= 0 || lines[i] == '\r\n' {
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continue
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}
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keys := lines[i].split(':')
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match keys[0] {
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'Upgrade', 'upgrade' {
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ws.flags << .has_upgrade
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}
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'Connection', 'connection' {
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ws.flags << .has_connection
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}
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'Sec-WebSocket-Accept', 'sec-websocket-accept' {
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l.d('comparing hashes')
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l.d('seckey: ${seckey}')
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challenge := create_key_challenge_response(seckey)
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l.d('challenge: ${challenge}')
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l.d('response: ${keys[1]}')
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if keys[1].trim_space() != challenge {
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l.e('handshake_handler: Sec-WebSocket-Accept header does not match computed sha1/base64 response.')
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}
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ws.flags << .has_accept
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unsafe {
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challenge.free()
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}
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}
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else {}
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}
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unsafe {
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keys.free()
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}
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}
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if ws.flags.len < 3 {
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ws.close(1002, 'invalid websocket HTTP headers')
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l.e('invalid websocket HTTP headers')
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}
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l.i('handshake successful!')
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unsafe {
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handshake_response.free()
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lines.free()
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header.free()
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}
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}
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