Websocket服务器无法读取标头字节的原因？

我正在尝试从我的 ESP32 开发板向所有连接的客户端发布 json 数据。

当我从 Firefox 打开服务器页面时，我看到以下日志：
代码：全选
opened [object WebSocket]
The connection to ws://192.168.3.62/ was interrupted while the page was loading.

以及ESP端对应的日志：
代码：全选
I (7024) ws_echo_server: Starting server on port: '80'
I (7034) ws_echo_server: Registering URI handlers
D (7034) httpd: httpd_thread: web server started
D (7034) httpd: httpd_server: doing select maxfd+1 = 56
D (7044) httpd_uri: httpd_register_uri_handler: [0] installed /
I (7044) ws_echo_server: Websocket server started
I (7054) bsp: httpd-my timer started
D (17234) httpd: httpd_server: processing listen socket 54
D (17234) httpd: httpd_accept_conn: newfd = 57
D (17244) httpd_sess: httpd_sess_new: fd = 57
I (17244) ws_echo_server: Handle hd=0x3ffc5bcc: opening websocket fd=57
D (17244) httpd_sess: httpd_sess_new: active sockets: 1
D (17254) httpd: httpd_accept_conn: complete
D (17254) httpd: httpd_server: doing select maxfd+1 = 58
D (17264) httpd: httpd_process_session: processing socket 57
D (17274) httpd_sess: httpd_sess_process: httpd_req_new
D (17274) httpd_parse: httpd_req_new: New request, has WS? No, sd->ws_handler valid? No, sd->ws_close? No
D (17284) httpd_txrx: httpd_recv_with_opt: requested length = 128
D (17294) httpd_txrx: httpd_recv_with_opt: received length = 128
D (17294) httpd_parse: read_block: received HTTP request block size = 128
D (17304) httpd_parse: cb_url: message begin
D (17304) httpd_parse: cb_url: processing url = /
D (17314) httpd_parse: verify_url: received URI = /
D (17314) httpd_parse: cb_header_field: headers begin
D (17324) httpd_txrx: httpd_unrecv: length = 112
D (17324) httpd_parse: pause_parsing: paused
D (17334) httpd_parse: cb_header_field: processing field = Host
D (17334) httpd_txrx: httpd_recv_with_opt: requested length = 128
D (17344) httpd_txrx: httpd_recv_with_opt: pending length = 112
D (17354) httpd_parse: read_block: received HTTP request block size = 112
D (17354) httpd_parse: continue_parsing: skip pre-parsed data of size = 5
D (17364) httpd_parse: continue_parsing: un-paused
D (17364) httpd_parse: cb_header_value: processing value = 192.168.3.62
D (17374) httpd_parse: cb_header_field: processing field = User-Agent
D (17384) httpd_parse: cb_header_value: processing value = Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:108.0) Gecko/20100101 Firefox/108.0
D (17394) httpd_parse: parse_block: parsed block size = 112
D (17404) httpd_txrx: httpd_recv_with_opt: requested length = 128
D (17404) httpd_txrx: httpd_recv_with_opt: received length = 128
D (17414) httpd_parse: read_block: received HTTP request block size = 128
D (17414) httpd_parse: cb_header_field: processing field = Accept
D (17424) httpd_parse: cb_header_value: processing value = text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
D (17434) httpd_parse: cb_header_field: processing field = Accept-Language
D (17444) httpd_parse: cb_header_value: processing value = en-US,en;q=0.5
D (17454) httpd_parse: parse_block: parsed block size = 240
D (17454) httpd_txrx: httpd_recv_with_opt: requested length = 128
D (17464) httpd_txrx: httpd_recv_with_opt: received length = 88
D (17474) httpd_parse: read_block: received HTTP request block size = 88
D (17474) httpd_parse: cb_header_field: processing field = Accept-Encoding
D (17484) httpd_parse: cb_header_value: processing value = gzip, deflate
D (17494) httpd_parse: cb_header_field: processing field = Connection
D (17494) httpd_parse: cb_header_value: processing value = keep-alive
D (17504) httpd_parse: cb_header_field: processing field = Upgrade-Insecure-Requests
D (17514) httpd_parse: cb_header_value: processing value = 1
D (17514) httpd_parse: cb_headers_complete: bytes read     = 344
D (17524) httpd_parse: cb_headers_complete: content length = 0
D (17524) httpd_parse: pause_parsing: paused
D (17534) httpd_parse: cb_no_body: message complete
D (17534) httpd_parse: httpd_parse_req: parsing complete
D (17544) httpd_uri: httpd_uri: request for / with type 1
D (17544) httpd_uri: httpd_find_uri_handler: [0] = /
I (17554) ws_echo_server: Handshake done, the new connection was opened
D (17564) httpd_txrx: httpd_send_all: sent = 64
D (17564) httpd_txrx: httpd_send_all: sent = 2
D (17574) httpd_txrx: httpd_send_all: sent = 1224
D (17574) httpd_sess: httpd_sess_process: httpd_req_delete
D (17584) httpd_sess: httpd_sess_process: success
D (17584) httpd: httpd_server: doing select maxfd+1 = 58
D (17594) httpd: httpd_server: processing listen socket 54
D (17594) httpd: httpd_accept_conn: newfd = 58
D (17604) httpd_sess: httpd_sess_new: fd = 58
I (17604) ws_echo_server: Handle hd=0x3ffc5bcc: opening websocket fd=58
D (17614) httpd_sess: httpd_sess_new: active sockets: 2
D (17614) httpd: httpd_accept_conn: complete
D (17624) httpd: httpd_server: doing select maxfd+1 = 59
D (17624) httpd: httpd_process_session: processing socket 58
D (17634) httpd_sess: httpd_sess_process: httpd_req_new
D (17634) httpd_parse: httpd_req_new: New request, has WS? No, sd->ws_handler valid? No, sd->ws_close? No
D (17644) httpd_txrx: httpd_recv_with_opt: requested length = 128
D (17654) httpd_txrx: httpd_recv_with_opt: received length = 128
D (17664) httpd_parse: read_block: received HTTP request block size = 128
D (17664) httpd_parse: cb_url: message begin
D (17674) httpd_parse: cb_url: processing url = /
D (17674) httpd_parse: verify_url: received URI = /
D (17684) httpd_parse: cb_header_field: headers begin
D (17684) httpd_txrx: httpd_unrecv: length = 112
D (17694) httpd_parse: pause_parsing: paused
D (17694) httpd_parse: cb_header_field: processing field = Host
D (17704) httpd_txrx: httpd_recv_with_opt: requested length = 128
D (17704) httpd_txrx: httpd_recv_with_opt: pending length = 112
D (17714) httpd_parse: read_block: received HTTP request block size = 112
D (17724) httpd_parse: continue_parsing: skip pre-parsed data of size = 5
D (17724) httpd_parse: continue_parsing: un-paused
D (17734) httpd_parse: cb_header_value: processing value = 192.168.3.62
D (17744) httpd_parse: cb_header_field: processing field = User-Agent
D (17744) httpd_parse: cb_header_value: processing value = Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:108.0) Gecko/20100101 Firefox/108.0
D (17754) httpd_parse: parse_block: parsed block size = 112
D (17764) httpd_txrx: httpd_recv_with_opt: requested length = 128
D (17774) httpd_txrx: httpd_recv_with_opt: received length = 128
D (17774) httpd_parse: read_block: received HTTP request block size = 128
D (17784) httpd_parse: cb_header_field: processing field = Accept
D (17784) httpd_parse: cb_header_value: processing value = */*
D (17794) httpd_parse: cb_header_field: processing field = Accept-Language
D (17804) httpd_parse: cb_header_value: processing value = en-US,en;q=0.5
D (17804) httpd_parse: cb_header_field: processing field = Accept-Encoding
D (17814) httpd_parse: cb_header_value: processing value = gzip, deflate
D (17824) httpd_parse: cb_header_field: processing field = Sec-WebSocket-Version
D (17834) httpd_parse: cb_header_value: processing value = 13
D (17834) httpd_parse: cb_header_field: processing field = Origin
D (17844) httpd_parse: cb_header_value: processing value = http://192.168.
D (17844) httpd_parse: parse_block: parsed block size = 240
D (17854) httpd_txrx: httpd_recv_with_opt: requested length = 128
D (17864) httpd_txrx: httpd_recv_with_opt: received length = 128
D (17864) httpd_parse: read_block: received HTTP request block size = 128
D (17874) httpd_parse: cb_header_value: processing value = 3.62
D (17884) httpd_parse: cb_header_field: processing field = Sec-WebSocket-Extensions
D (17884) httpd_parse: cb_header_value: processing value = permessage-deflate
D (17894) httpd_parse: cb_header_field: processing field = Sec-WebSocket-Key
D (17904) httpd_parse: cb_header_value: processing value = TcVmVF5xRAjn3b2GxQEH8g==
D (17914) httpd_parse: cb_header_field: processing field = Connection
D (17914) httpd_parse: cb_header_value: processing value = keep-alive, Upgrade
D (17924) httpd_parse: parse_block: parsed block size = 368
D (17924) httpd_txrx: httpd_recv_with_opt: requested length = 128
D (17934) httpd_txrx: httpd_recv_with_opt: received length = 67
D (17944) httpd_parse: read_block: received HTTP request block size = 67
D (17944) httpd_parse: cb_header_value: processing value =
D (17954) httpd_parse: cb_header_field: processing field = Pragma
D (17964) httpd_parse: cb_header_value: processing value = no-cache
D (17964) httpd_parse: cb_header_field: processing field = Cache-Control
D (17974) httpd_parse: cb_header_value: processing value = no-cache
D (17974) httpd_parse: cb_header_field: processing field = Upgrade
D (17984) httpd_parse: cb_header_value: processing value = websocket
D (17994) httpd_parse: cb_headers_complete: bytes read     = 453
D (17994) httpd_parse: cb_headers_complete: content length = 0
D (18004) httpd_parse: cb_headers_complete: Got an upgrade request
D (18014) httpd_parse: pause_parsing: paused
D (18014) httpd_parse: cb_no_body: message complete
D (18014) httpd_parse: httpd_parse_req: parsing complete
D (18024) httpd_uri: httpd_uri: request for / with type 1
D (18034) httpd_uri: httpd_find_uri_handler: [0] = /
D (18034) httpd_uri: httpd_uri: Responding WS handshake to sock 58
D (18044) httpd_ws: httpd_ws_respond_server_handshake: Server key before encoding: TcVmVF5xRAjn3b2GxQEH8g==258EAFA5-E914-47DA-95CA-C5AB0DC85B11
I (18054) ws_echo_server: Client type=1 fd=57
I (18054) ws_echo_server: Client type=1 fd=58
D (18064) httpd_ws: httpd_ws_respond_server_handshake: Generated server key: 9W/eJ2hmKdrS0FawDB2hNRayfUU=
I (18074) ws_echo_server: Handshake done, the new connection was opened
D (18084) httpd_txrx: httpd_send_all: sent = 64
W (18084) wifi:idx:0 (ifx:0, 60:aa:ef:13:aa:68), tid:0, ssn:31, winSize:64
D (18094) httpd_txrx: httpd_send_all: sent = 2
D (18094) httpd_txrx: httpd_send_all: sent = 1224
D (18104) httpd_sess: httpd_sess_process: httpd_req_delete
D (18104) httpd_sess: httpd_sess_process: success
D (18114) httpd: httpd_server: doing select maxfd+1 = 59
D (18114) httpd: httpd_process_session: processing socket 58
D (18124) httpd_sess: httpd_sess_process: httpd_req_new
D (18124) httpd_parse: httpd_req_new: New request, has WS? Yes, sd->ws_handler valid? Yes, sd->ws_close? No
D (18134) httpd_txrx: httpd_recv_with_opt: requested length = 1
D (18144) httpd_txrx: httpd_recv_with_opt: received length = 0
W (18154) httpd_ws: httpd_ws_get_frame_type: Failed to read header byte (socket FD invalid), closing socket now
D (18164) httpd_parse: httpd_req_new: New WS request from existing socket, ws_type=8
D (18174) httpd_sess: httpd_sess_process: httpd_req_delete
D (18174) httpd_parse: httpd_req_cleanup: Try closing WS connection at FD: 58
D (18184) httpd_sess: httpd_sess_process: success
D (18184) httpd: httpd_server: doing select maxfd+1 = 59
D (18194) httpd: httpd_server: processing ctrl message
D (18194) httpd: httpd_process_ctrl_msg: work
D (18204) httpd_sess: httpd_sess_delete: fd = 58
I (18204) ws_echo_server: Handle hd=0x3ffc5bcc: closing websocket fd=58
D (18214) httpd_sess: httpd_sess_delete: active sockets: 1
D (18224) httpd: httpd_server: doing select maxfd+1 = 58
I (19054) ws_echo_server: Client type=1 fd=57
I (20054) ws_echo_server: Client type=1 fd=57
I (21054) ws_echo_server: Client type=1 fd=57
I (22054) ws_echo_server: Client type=1 fd=57
I (23054) ws_echo_server: Client type=1 fd=57
I (24054) ws_echo_server: Client type=1 fd=57
I (25054) ws_echo_server: Client type=1 fd=57
I (26054) ws_echo_server: Client type=1 fd=57
I (27054) ws_echo_server: Client type=1 fd=57

所以只打开一个HTTP客户端，WS客户端（描述符）马上关闭。

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