[问答]

Websocket服务器无法读取标头字节的原因？

问答对人有帮助，内容完整，我也想知道答案 0 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。 0
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