From b8005dbb941378d0772c2e8e7fe50689424e22c1 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 16:37:06 -0500 Subject: [PATCH 01/41] Implement graceful socket closure and add delay for buffer drainage --- src/gen_tcp_server.erl | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index 8acaf10..71b3ea7 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -151,7 +151,8 @@ handle_info({tcp, Socket, Packet}, State) -> ?TRACE("Sending reply to endpoint ~p and closing socket: ~p", [socket:peername(Socket), Socket]), case try_send(Socket, ResponsePacket) of ok -> - try_close(Socket); + %% Give socket buffer time to drain before closing + graceful_close(Socket); {error, closed} -> ok; %% Already closed, nothing to do {error, _Reason} -> @@ -240,7 +241,8 @@ try_send_binary(Socket, Packet) when is_binary(Packet) -> maybe_yield(<<>>) -> ok; maybe_yield(_) -> - receive after 0 -> ok end. + %% Small delay helps ESP32 lwIP drain socket buffers + receive after 1 -> ok end. is_string([]) -> true; @@ -258,6 +260,20 @@ try_close(Socket) -> io:format("Close failed due to error ~p~n", [Error]) end. +%% @private +graceful_close(Socket) -> + %% Shutdown write side to signal no more data, but keep reading until closed + %% This ensures all buffered data is transmitted before closing + case socket:shutdown(Socket, write) of + ok -> + %% Give ESP32 lwIP time to flush buffers (typically ~10-50ms for full MTU) + timer:sleep(10), + try_close(Socket); + {error, _Reason} -> + %% If shutdown fails, just close immediately + try_close(Socket) + end. + %% @private set_socket_options(Socket, SocketOptions) -> maps:fold( From 3131f831dbc5337fd60794b264fbdedfddd0d335 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 16:47:14 -0500 Subject: [PATCH 02/41] Improve error handling in file reading and enhance socket send logic for better stability --- src/gen_tcp_server.erl | 25 ++++++++++--------------- src/httpd_file_handler.erl | 18 ++++++++++++------ 2 files changed, 22 insertions(+), 21 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index 71b3ea7..a72e610 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -222,6 +222,7 @@ try_send_binary(Socket, Packet) when is_binary(Packet) -> try_send_binary(Socket, Rest); {ok, Remaining} -> %% Partial send - combine remaining with rest and retry + io:format("Partial send: ~p bytes remaining, retrying~n", [byte_size(Remaining)]), try_send_binary(Socket, <>); {error, closed} -> %% Only log if we actually had more data to send @@ -232,8 +233,8 @@ try_send_binary(Socket, Packet) when is_binary(Packet) -> end, {error, closed}; {error, Reason} -> - io:format("Send error: ~p (chunk: ~p, total: ~p)~n", - [Reason, ChunkSize, TotalSize]), + io:format("Send error: ~p (chunk: ~p, total: ~p, remaining: ~p)~n", + [Reason, ChunkSize, TotalSize, byte_size(Rest)]), {error, Reason} end. @@ -241,8 +242,9 @@ try_send_binary(Socket, Packet) when is_binary(Packet) -> maybe_yield(<<>>) -> ok; maybe_yield(_) -> - %% Small delay helps ESP32 lwIP drain socket buffers - receive after 1 -> ok end. + %% Give ESP32 lwIP time to drain socket buffers between chunks + %% This prevents buffer overflow and connection resets + receive after 5 -> ok end. is_string([]) -> true; @@ -262,17 +264,10 @@ try_close(Socket) -> %% @private graceful_close(Socket) -> - %% Shutdown write side to signal no more data, but keep reading until closed - %% This ensures all buffered data is transmitted before closing - case socket:shutdown(Socket, write) of - ok -> - %% Give ESP32 lwIP time to flush buffers (typically ~10-50ms for full MTU) - timer:sleep(10), - try_close(Socket); - {error, _Reason} -> - %% If shutdown fails, just close immediately - try_close(Socket) - end. + %% Don't shutdown write immediately - let all data be queued first + %% ESP32 lwIP needs time to drain the send buffer between chunks + %% Simply close - the FIN will be sent after all buffered data + try_close(Socket). %% @private set_socket_options(Socket, SocketOptions) -> diff --git a/src/httpd_file_handler.erl b/src/httpd_file_handler.erl index cdd4c0d..d1a438d 100644 --- a/src/httpd_file_handler.erl +++ b/src/httpd_file_handler.erl @@ -47,12 +47,18 @@ handle_http_req(#{method := get} = _HttpRequest, State) -> end, FullPath = join("/", lists:reverse(ResolvedPath)), ?TRACE("App: ~p PathSuffix: ~p FullPath: ~p", [App, ResolvedPath, FullPath]), - case atomvm:read_priv(App, FullPath) of - undefined -> - io:format("httpd_file_handler: file not found - app=~p path=~p~n", [App, FullPath]), - {error, not_found}; - Data -> - {close, #{"Content-Type" => get_content_type(lists:reverse(ResolvedPath))}, Data} + try + case atomvm:read_priv(App, FullPath) of + undefined -> + io:format("httpd_file_handler: file not found - app=~p path=~p~n", [App, FullPath]), + {error, not_found}; + Data when is_binary(Data) -> + {close, #{"Content-Type" => get_content_type(lists:reverse(ResolvedPath))}, Data} + end + catch + _:Reason -> + io:format("httpd_file_handler: error reading file ~p: ~p~n", [FullPath, Reason]), + {error, internal_server_error} end; handle_http_req(_HttpRequest, _HandlerConfig) -> {error, internal_server_error}. From 8f0a3c7a245fdfd9d985b275ce28e476b875f1b6 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 16:52:32 -0500 Subject: [PATCH 03/41] Improve error handling in socket receive logic to prevent premature closure --- src/gen_tcp_server.erl | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index a72e610..c9d5025 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -306,7 +306,10 @@ loop(ControllingProcess, Connection) -> ?TRACE("Peer closed connection ~p", [Connection]), ControllingProcess ! {tcp_closed, Connection}, ok; - {error, _SomethingElse} -> - ?TRACE("Some other error occurred ~p: ~p", [Connection, _SomethingElse]), - try_close(Connection) + {error, Reason} -> + %% Don't close the socket here! The handler may still be sending. + %% Just notify the controlling process and let it handle cleanup. + io:format("Socket recv error on ~p: ~p~n", [Connection, Reason]), + ControllingProcess ! {tcp_closed, Connection}, + ok end. From bcb61c057bd0f6eca34ad1cbd38ecc4513efac01 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 16:57:56 -0500 Subject: [PATCH 04/41] Enhance socket send logic with detailed logging and improved error handling for buffer full scenarios --- src/gen_tcp_server.erl | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index c9d5025..c64fe8e 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -217,13 +217,30 @@ try_send_binary(Socket, Packet) when is_binary(Packet) -> <> = Packet, case socket:send(Socket, Chunk) of ok -> + io:format("Sent chunk ~p/~p bytes~n", [ChunkSize, TotalSize]), %% Give the scheduler a chance to run and let TCP drain maybe_yield(Rest), try_send_binary(Socket, Rest); {ok, Remaining} -> %% Partial send - combine remaining with rest and retry io:format("Partial send: ~p bytes remaining, retrying~n", [byte_size(Remaining)]), + maybe_yield(Rest), try_send_binary(Socket, <>); + {error, eagain} -> + %% Socket buffer full, wait and retry + io:format("Socket buffer full (eagain), waiting...~n"), + receive after 10 -> ok end, + try_send_binary(Socket, Packet); + {error, ewouldblock} -> + %% Socket buffer full, wait and retry + io:format("Socket buffer full (ewouldblock), waiting...~n"), + receive after 10 -> ok end, + try_send_binary(Socket, Packet); + {error, timeout} -> + %% Send timeout, retry + io:format("Send timeout, retrying...~n"), + receive after 10 -> ok end, + try_send_binary(Socket, Packet); {error, closed} -> %% Only log if we actually had more data to send case byte_size(Rest) of @@ -303,13 +320,13 @@ loop(ControllingProcess, Connection) -> ControllingProcess ! {tcp, Connection, Data}, loop(ControllingProcess, Connection); {error, closed} -> - ?TRACE("Peer closed connection ~p", [Connection]), + io:format("Loop: peer closed connection ~p~n", [Connection]), ControllingProcess ! {tcp_closed, Connection}, ok; {error, Reason} -> %% Don't close the socket here! The handler may still be sending. %% Just notify the controlling process and let it handle cleanup. - io:format("Socket recv error on ~p: ~p~n", [Connection, Reason]), + io:format("Loop: socket recv error on ~p: ~p~n", [Connection, Reason]), ControllingProcess ! {tcp_closed, Connection}, ok end. From d2b40595a3ef16bd8f3dbc4a805ef3ef4a0ee301 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 17:06:53 -0500 Subject: [PATCH 05/41] Optimize try_send function for improved efficiency and reduce socket buffer overflow risk --- src/gen_tcp_server.erl | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index c64fe8e..49824a3 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -190,14 +190,11 @@ try_send(Socket, Packet) when is_binary(Packet) -> try_send(Socket, Byte) when is_integer(Byte) -> %% Handles bytes (0-255) in iolists. Unicode must be pre-encoded to UTF-8. ?TRACE("Sending byte ~p as ~p", [Byte, <>]), - try_send(Socket, <>); + try_send_binary(Socket, <>); try_send(Socket, List) when is_list(List) -> - case is_string(List) of - true -> - try_send(Socket, list_to_binary(List)); - _ -> - try_send_iolist(Socket, List) - end. + %% Flatten iolist to binary to reduce number of send syscalls + %% This is more efficient than sending each element separately + try_send_binary(Socket, erlang:iolist_to_binary(List)). try_send_iolist(_Socket, []) -> ok; @@ -259,9 +256,8 @@ try_send_binary(Socket, Packet) when is_binary(Packet) -> maybe_yield(<<>>) -> ok; maybe_yield(_) -> - %% Give ESP32 lwIP time to drain socket buffers between chunks - %% This prevents buffer overflow and connection resets - receive after 5 -> ok end. + %% Brief yield to let TCP drain - keep it short to avoid client timeouts + receive after 1 -> ok end. is_string([]) -> true; From 7cb9656fc1816cb78bc380bc698ac21b0b667a00 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 17:19:47 -0500 Subject: [PATCH 06/41] Refactor try_send function to handle strings and iolists separately; add delay in graceful_close for proper buffer drainage --- src/gen_tcp_server.erl | 18 ++++++++++++------ src/httpd_file_handler.erl | 1 + 2 files changed, 13 insertions(+), 6 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index 49824a3..1e731e3 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -192,9 +192,14 @@ try_send(Socket, Byte) when is_integer(Byte) -> ?TRACE("Sending byte ~p as ~p", [Byte, <>]), try_send_binary(Socket, <>); try_send(Socket, List) when is_list(List) -> - %% Flatten iolist to binary to reduce number of send syscalls - %% This is more efficient than sending each element separately - try_send_binary(Socket, erlang:iolist_to_binary(List)). + case is_string(List) of + true -> + %% It's a string (list of integers), convert to binary + try_send_binary(Socket, list_to_binary(List)); + false -> + %% It's an iolist, send each element + try_send_iolist(Socket, List) + end. try_send_iolist(_Socket, []) -> ok; @@ -277,9 +282,10 @@ try_close(Socket) -> %% @private graceful_close(Socket) -> - %% Don't shutdown write immediately - let all data be queued first - %% ESP32 lwIP needs time to drain the send buffer between chunks - %% Simply close - the FIN will be sent after all buffered data + %% ESP32 lwIP needs time to drain the send buffer before close + %% Without this delay, close() may RST the connection before all data is sent + %% TODO: find a better way to determine when send buffer is empty + receive after 100 -> ok end, try_close(Socket). %% @private diff --git a/src/httpd_file_handler.erl b/src/httpd_file_handler.erl index d1a438d..1297350 100644 --- a/src/httpd_file_handler.erl +++ b/src/httpd_file_handler.erl @@ -53,6 +53,7 @@ handle_http_req(#{method := get} = _HttpRequest, State) -> io:format("httpd_file_handler: file not found - app=~p path=~p~n", [App, FullPath]), {error, not_found}; Data when is_binary(Data) -> + io:format("Serving ~s (~p bytes)~n", [FullPath, byte_size(Data)]), {close, #{"Content-Type" => get_content_type(lists:reverse(ResolvedPath))}, Data} end catch From dad1308dd3bd45e8f346a47c70da2b00093629da Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 17:25:00 -0500 Subject: [PATCH 07/41] more logs --- src/gen_tcp_server.erl | 25 +++++++++++++------------ 1 file changed, 13 insertions(+), 12 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index 1e731e3..6927b57 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -217,43 +217,43 @@ try_send_binary(Socket, Packet) when is_binary(Packet) -> TotalSize = byte_size(Packet), ChunkSize = erlang:min(TotalSize, ?MAX_SEND_CHUNK), <> = Packet, + %% Get a short socket ID for logging (last 4 digits of ref) + SocketId = erlang:phash2(Socket, 10000), case socket:send(Socket, Chunk) of ok -> - io:format("Sent chunk ~p/~p bytes~n", [ChunkSize, TotalSize]), + io:format("[~p] Sent ~p/~p (~p left)~n", [SocketId, ChunkSize, TotalSize, byte_size(Rest)]), %% Give the scheduler a chance to run and let TCP drain maybe_yield(Rest), try_send_binary(Socket, Rest); {ok, Remaining} -> %% Partial send - combine remaining with rest and retry - io:format("Partial send: ~p bytes remaining, retrying~n", [byte_size(Remaining)]), + io:format("[~p] Partial: ~p unsent, retrying~n", [SocketId, byte_size(Remaining)]), maybe_yield(Rest), try_send_binary(Socket, <>); {error, eagain} -> %% Socket buffer full, wait and retry - io:format("Socket buffer full (eagain), waiting...~n"), + io:format("[~p] eagain, waiting~n", [SocketId]), receive after 10 -> ok end, try_send_binary(Socket, Packet); {error, ewouldblock} -> %% Socket buffer full, wait and retry - io:format("Socket buffer full (ewouldblock), waiting...~n"), + io:format("[~p] ewouldblock, waiting~n", [SocketId]), receive after 10 -> ok end, try_send_binary(Socket, Packet); {error, timeout} -> %% Send timeout, retry - io:format("Send timeout, retrying...~n"), + io:format("[~p] timeout, retrying~n", [SocketId]), receive after 10 -> ok end, try_send_binary(Socket, Packet); {error, closed} -> %% Only log if we actually had more data to send case byte_size(Rest) of - 0 -> ok; %% Sent everything, client just closed after - that's fine - _ -> io:format("Connection closed mid-transfer (~p/~p bytes sent)~n", - [ChunkSize, TotalSize]) + 0 -> ok; %% Sent everything, client just closed after + _ -> io:format("[~p] CLOSED mid-transfer (~p unsent)~n", [SocketId, byte_size(Rest)]) end, {error, closed}; {error, Reason} -> - io:format("Send error: ~p (chunk: ~p, total: ~p, remaining: ~p)~n", - [Reason, ChunkSize, TotalSize, byte_size(Rest)]), + io:format("[~p] ERROR ~p (~p unsent)~n", [SocketId, Reason, byte_size(Rest)]), {error, Reason} end. @@ -316,19 +316,20 @@ accept(ControllingProcess, ListenSocket) -> %% @private loop(ControllingProcess, Connection) -> + SocketId = erlang:phash2(Connection, 10000), case socket:recv(Connection) of {ok, Data} -> ?TRACE("Received data ~p on connection ~p", [Data, Connection]), ControllingProcess ! {tcp, Connection, Data}, loop(ControllingProcess, Connection); {error, closed} -> - io:format("Loop: peer closed connection ~p~n", [Connection]), + io:format("[~p] Loop: peer closed~n", [SocketId]), ControllingProcess ! {tcp_closed, Connection}, ok; {error, Reason} -> %% Don't close the socket here! The handler may still be sending. %% Just notify the controlling process and let it handle cleanup. - io:format("Loop: socket recv error on ~p: ~p~n", [Connection, Reason]), + io:format("[~p] Loop: recv error ~p~n", [SocketId, Reason]), ControllingProcess ! {tcp_closed, Connection}, ok end. From 84868249f4c86d0a3442d578d2631ff991efe7d1 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 17:28:13 -0500 Subject: [PATCH 08/41] no phash --- src/gen_tcp_server.erl | 21 +++++++++------------ 1 file changed, 9 insertions(+), 12 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index 6927b57..f8f8120 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -217,43 +217,41 @@ try_send_binary(Socket, Packet) when is_binary(Packet) -> TotalSize = byte_size(Packet), ChunkSize = erlang:min(TotalSize, ?MAX_SEND_CHUNK), <> = Packet, - %% Get a short socket ID for logging (last 4 digits of ref) - SocketId = erlang:phash2(Socket, 10000), case socket:send(Socket, Chunk) of ok -> - io:format("[~p] Sent ~p/~p (~p left)~n", [SocketId, ChunkSize, TotalSize, byte_size(Rest)]), + io:format("Sent ~p/~p (~p left)~n", [ChunkSize, TotalSize, byte_size(Rest)]), %% Give the scheduler a chance to run and let TCP drain maybe_yield(Rest), try_send_binary(Socket, Rest); {ok, Remaining} -> %% Partial send - combine remaining with rest and retry - io:format("[~p] Partial: ~p unsent, retrying~n", [SocketId, byte_size(Remaining)]), + io:format("Partial: ~p unsent, retrying~n", [byte_size(Remaining)]), maybe_yield(Rest), try_send_binary(Socket, <>); {error, eagain} -> %% Socket buffer full, wait and retry - io:format("[~p] eagain, waiting~n", [SocketId]), + io:format("eagain, waiting~n", []), receive after 10 -> ok end, try_send_binary(Socket, Packet); {error, ewouldblock} -> %% Socket buffer full, wait and retry - io:format("[~p] ewouldblock, waiting~n", [SocketId]), + io:format("ewouldblock, waiting~n", []), receive after 10 -> ok end, try_send_binary(Socket, Packet); {error, timeout} -> %% Send timeout, retry - io:format("[~p] timeout, retrying~n", [SocketId]), + io:format("timeout, retrying~n", []), receive after 10 -> ok end, try_send_binary(Socket, Packet); {error, closed} -> %% Only log if we actually had more data to send case byte_size(Rest) of 0 -> ok; %% Sent everything, client just closed after - _ -> io:format("[~p] CLOSED mid-transfer (~p unsent)~n", [SocketId, byte_size(Rest)]) + _ -> io:format("CLOSED mid-transfer (~p unsent)~n", [byte_size(Rest)]) end, {error, closed}; {error, Reason} -> - io:format("[~p] ERROR ~p (~p unsent)~n", [SocketId, Reason, byte_size(Rest)]), + io:format("ERROR ~p (~p unsent)~n", [Reason, byte_size(Rest)]), {error, Reason} end. @@ -316,20 +314,19 @@ accept(ControllingProcess, ListenSocket) -> %% @private loop(ControllingProcess, Connection) -> - SocketId = erlang:phash2(Connection, 10000), case socket:recv(Connection) of {ok, Data} -> ?TRACE("Received data ~p on connection ~p", [Data, Connection]), ControllingProcess ! {tcp, Connection, Data}, loop(ControllingProcess, Connection); {error, closed} -> - io:format("[~p] Loop: peer closed~n", [SocketId]), + io:format("Loop: peer closed~n", []), ControllingProcess ! {tcp_closed, Connection}, ok; {error, Reason} -> %% Don't close the socket here! The handler may still be sending. %% Just notify the controlling process and let it handle cleanup. - io:format("[~p] Loop: recv error ~p~n", [SocketId, Reason]), + io:format("Loop: recv error ~p~n", [Reason]), ControllingProcess ! {tcp_closed, Connection}, ok end. From 8abf20ffd21805801c6d9c91d8420ea35ec00b81 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 17:32:02 -0500 Subject: [PATCH 09/41] Refactor try_send_binary function to improve handling of partial sends and reduce memory allocation; add delays for socket buffer management --- src/gen_tcp_server.erl | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index f8f8120..20839a1 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -219,35 +219,35 @@ try_send_binary(Socket, Packet) when is_binary(Packet) -> <> = Packet, case socket:send(Socket, Chunk) of ok -> - io:format("Sent ~p/~p (~p left)~n", [ChunkSize, TotalSize, byte_size(Rest)]), %% Give the scheduler a chance to run and let TCP drain maybe_yield(Rest), try_send_binary(Socket, Rest); {ok, Remaining} -> - %% Partial send - combine remaining with rest and retry - io:format("Partial: ~p unsent, retrying~n", [byte_size(Remaining)]), - maybe_yield(Rest), - try_send_binary(Socket, <>); + %% Partial send - send Remaining first, then continue with Rest + %% Avoid <> which allocates a large new binary + io:format("Partial: ~p unsent~n", [byte_size(Remaining)]), + receive after 5 -> ok end, + case try_send_binary(Socket, Remaining) of + ok -> try_send_binary(Socket, Rest); + Error -> Error + end; {error, eagain} -> %% Socket buffer full, wait and retry - io:format("eagain, waiting~n", []), receive after 10 -> ok end, try_send_binary(Socket, Packet); {error, ewouldblock} -> %% Socket buffer full, wait and retry - io:format("ewouldblock, waiting~n", []), receive after 10 -> ok end, try_send_binary(Socket, Packet); {error, timeout} -> %% Send timeout, retry - io:format("timeout, retrying~n", []), receive after 10 -> ok end, try_send_binary(Socket, Packet); {error, closed} -> %% Only log if we actually had more data to send case byte_size(Rest) of 0 -> ok; %% Sent everything, client just closed after - _ -> io:format("CLOSED mid-transfer (~p unsent)~n", [byte_size(Rest)]) + _ -> io:format("CLOSED (~p unsent)~n", [byte_size(Rest)]) end, {error, closed}; {error, Reason} -> From 4fb1330df5b3deed90603c7e28b7ece6b64d5728 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 17:35:56 -0500 Subject: [PATCH 10/41] Refactor HTTP response handling to use create_close_reply for consistent closure behavior and add Connection: close header --- src/httpd.erl | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) diff --git a/src/httpd.erl b/src/httpd.erl index 4d1dc76..a5794aa 100644 --- a/src/httpd.erl +++ b/src/httpd.erl @@ -295,18 +295,18 @@ call_http_req_handler(Socket, HttpRequest, State) -> close -> {close, State}; {close, Reply} -> - {close, create_reply(?OK, #{"Content-Type" => "application/octet-stream"}, Reply)}; + {close, create_close_reply(?OK, #{"Content-Type" => "application/octet-stream"}, Reply)}; {close, ReplyHeaders, Reply} -> - {close, create_reply(?OK, ReplyHeaders, Reply)}; + {close, create_close_reply(?OK, ReplyHeaders, Reply)}; %% errors {error, not_found} -> - {close, create_error(?NOT_FOUND, not_found)}; + {close, create_close_reply(?NOT_FOUND, "text/html", error_body(?NOT_FOUND, not_found))}; {error, bad_request} -> - {close, create_error(?BAD_REQUEST, bad_request)}; + {close, create_close_reply(?BAD_REQUEST, "text/html", error_body(?BAD_REQUEST, bad_request))}; {error, internal_server_error} -> - {close, create_error(?INTERNAL_SERVER_ERROR, internal_server_error)}; + {close, create_close_reply(?INTERNAL_SERVER_ERROR, "text/html", error_body(?INTERNAL_SERVER_ERROR, internal_server_error))}; HandlerError -> - {close, create_error(?INTERNAL_SERVER_ERROR, HandlerError)} + {close, create_close_reply(?INTERNAL_SERVER_ERROR, "text/html", error_body(?INTERNAL_SERVER_ERROR, HandlerError))} end. %% @private @@ -575,6 +575,19 @@ create_error(StatusCode, Error) -> io:format("error in httpd. StatusCode=~p Error=~p~n", [StatusCode, Error]), create_reply(StatusCode, "text/html", ErrorString). +%% @private +error_body(StatusCode, Error) -> + io:format("error in httpd. StatusCode=~p Error=~p~n", [StatusCode, Error]), + io_lib:format("Error: ~p", [Error]). + +%% @private +create_close_reply(StatusCode, ContentType, Reply) when is_list(ContentType) orelse is_binary(ContentType) -> + create_close_reply(StatusCode, #{"Content-Type" => ContentType}, Reply); +create_close_reply(StatusCode, Headers, Reply) when is_map(Headers) -> + %% Add Connection: close header to signal the client we're closing + HeadersWithClose = Headers#{"Connection" => "close"}, + create_reply(StatusCode, HeadersWithClose, Reply). + %% @private create_reply(StatusCode, ContentType, Reply) when is_list(ContentType) orelse is_binary(ContentType) -> create_reply(StatusCode, #{"Content-Type" => ContentType}, Reply); From 6502b012fb2dcb0e872ba814920366534347bca7 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 17:39:58 -0500 Subject: [PATCH 11/41] Enhance logging in handle_info and try_send_binary for better error tracking; increase wait times for socket buffer management --- src/gen_tcp_server.erl | 33 +++++++++++++++++---------------- 1 file changed, 17 insertions(+), 16 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index 20839a1..242e522 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -136,11 +136,13 @@ handle_info({tcp, Socket, Packet}, State) -> ?TRACE("Sending reply to endpoint ~p", [socket:peername(Socket)]), case try_send(Socket, ResponsePacket) of ok -> + io:format("Reply sent OK~n"), {noreply, State#state{handler_state=ResponseState}}; {error, closed} -> - ?TRACE("Connection closed during send, cleaning up", []), + io:format("Reply failed: closed~n"), {noreply, State#state{handler_state=ResponseState}}; - {error, _Reason} -> + {error, Reason} -> + io:format("Reply failed: ~p~n", [Reason]), try_close(Socket), {noreply, State#state{handler_state=ResponseState}} end; @@ -151,11 +153,13 @@ handle_info({tcp, Socket, Packet}, State) -> ?TRACE("Sending reply to endpoint ~p and closing socket: ~p", [socket:peername(Socket), Socket]), case try_send(Socket, ResponsePacket) of ok -> - %% Give socket buffer time to drain before closing + io:format("Close reply sent OK~n"), graceful_close(Socket); {error, closed} -> - ok; %% Already closed, nothing to do - {error, _Reason} -> + io:format("Close reply failed: closed~n"), + ok; + {error, Reason} -> + io:format("Close reply failed: ~p~n", [Reason]), try_close(Socket) end, {noreply, State}; @@ -223,33 +227,30 @@ try_send_binary(Socket, Packet) when is_binary(Packet) -> maybe_yield(Rest), try_send_binary(Socket, Rest); {ok, Remaining} -> - %% Partial send - send Remaining first, then continue with Rest - %% Avoid <> which allocates a large new binary + %% Partial send - wait longer for buffer to drain, then retry io:format("Partial: ~p unsent~n", [byte_size(Remaining)]), - receive after 5 -> ok end, + receive after 50 -> ok end, case try_send_binary(Socket, Remaining) of ok -> try_send_binary(Socket, Rest); Error -> Error end; {error, eagain} -> %% Socket buffer full, wait and retry - receive after 10 -> ok end, + receive after 50 -> ok end, try_send_binary(Socket, Packet); {error, ewouldblock} -> %% Socket buffer full, wait and retry - receive after 10 -> ok end, + receive after 50 -> ok end, try_send_binary(Socket, Packet); {error, timeout} -> %% Send timeout, retry - receive after 10 -> ok end, + receive after 50 -> ok end, try_send_binary(Socket, Packet); {error, closed} -> - %% Only log if we actually had more data to send - case byte_size(Rest) of - 0 -> ok; %% Sent everything, client just closed after - _ -> io:format("CLOSED (~p unsent)~n", [byte_size(Rest)]) - end, {error, closed}; + {error, ebadf} -> + %% Socket was closed/invalidated + {error, ebadf}; {error, Reason} -> io:format("ERROR ~p (~p unsent)~n", [Reason, byte_size(Rest)]), {error, Reason} From 7ff9d79032c31c8e3d7f93f35f3a45e8f0ac330b Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 17:51:25 -0500 Subject: [PATCH 12/41] Refactor logging in gen_tcp_server and httpd_file_handler to reduce verbosity; improve error handling in try_send functions --- src/gen_tcp_server.erl | 24 +++++------------------- src/httpd_file_handler.erl | 1 - 2 files changed, 5 insertions(+), 20 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index 242e522..276bb80 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -136,14 +136,8 @@ handle_info({tcp, Socket, Packet}, State) -> ?TRACE("Sending reply to endpoint ~p", [socket:peername(Socket)]), case try_send(Socket, ResponsePacket) of ok -> - io:format("Reply sent OK~n"), {noreply, State#state{handler_state=ResponseState}}; - {error, closed} -> - io:format("Reply failed: closed~n"), - {noreply, State#state{handler_state=ResponseState}}; - {error, Reason} -> - io:format("Reply failed: ~p~n", [Reason]), - try_close(Socket), + {error, _} -> {noreply, State#state{handler_state=ResponseState}} end; {noreply, ResponseState} -> @@ -153,13 +147,8 @@ handle_info({tcp, Socket, Packet}, State) -> ?TRACE("Sending reply to endpoint ~p and closing socket: ~p", [socket:peername(Socket), Socket]), case try_send(Socket, ResponsePacket) of ok -> - io:format("Close reply sent OK~n"), graceful_close(Socket); - {error, closed} -> - io:format("Close reply failed: closed~n"), - ok; - {error, Reason} -> - io:format("Close reply failed: ~p~n", [Reason]), + {error, _} -> try_close(Socket) end, {noreply, State}; @@ -227,9 +216,8 @@ try_send_binary(Socket, Packet) when is_binary(Packet) -> maybe_yield(Rest), try_send_binary(Socket, Rest); {ok, Remaining} -> - %% Partial send - wait longer for buffer to drain, then retry - io:format("Partial: ~p unsent~n", [byte_size(Remaining)]), - receive after 50 -> ok end, + %% Partial send - wait for buffer to drain, then retry + receive after 20 -> ok end, case try_send_binary(Socket, Remaining) of ok -> try_send_binary(Socket, Rest); Error -> Error @@ -321,13 +309,11 @@ loop(ControllingProcess, Connection) -> ControllingProcess ! {tcp, Connection, Data}, loop(ControllingProcess, Connection); {error, closed} -> - io:format("Loop: peer closed~n", []), ControllingProcess ! {tcp_closed, Connection}, ok; - {error, Reason} -> + {error, _Reason} -> %% Don't close the socket here! The handler may still be sending. %% Just notify the controlling process and let it handle cleanup. - io:format("Loop: recv error ~p~n", [Reason]), ControllingProcess ! {tcp_closed, Connection}, ok end. diff --git a/src/httpd_file_handler.erl b/src/httpd_file_handler.erl index 1297350..d1a438d 100644 --- a/src/httpd_file_handler.erl +++ b/src/httpd_file_handler.erl @@ -53,7 +53,6 @@ handle_http_req(#{method := get} = _HttpRequest, State) -> io:format("httpd_file_handler: file not found - app=~p path=~p~n", [App, FullPath]), {error, not_found}; Data when is_binary(Data) -> - io:format("Serving ~s (~p bytes)~n", [FullPath, byte_size(Data)]), {close, #{"Content-Type" => get_content_type(lists:reverse(ResolvedPath))}, Data} end catch From 8c1907aeaf9e8ecbd1fee1b575a7bb97c31cf086 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 17:59:07 -0500 Subject: [PATCH 13/41] Implement gzip support in handle_http_req; add get_accept_encoding and accepts_gzip functions for improved file serving --- src/httpd_file_handler.erl | 56 ++++++++++++++++++++++++++++++++------ 1 file changed, 48 insertions(+), 8 deletions(-) diff --git a/src/httpd_file_handler.erl b/src/httpd_file_handler.erl index d1a438d..9649046 100644 --- a/src/httpd_file_handler.erl +++ b/src/httpd_file_handler.erl @@ -36,7 +36,7 @@ init_handler(PathSuffix, HandlerConfig) -> {ok, #state{path_suffix = PathSuffix, handler_config = HandlerConfig}}. %% @hidden -handle_http_req(#{method := get} = _HttpRequest, State) -> +handle_http_req(#{method := get} = HttpRequest, State) -> HandlerConfig = State#state.handler_config, App = maps:get(app, HandlerConfig), PathSuffix = State#state.path_suffix, @@ -47,14 +47,11 @@ handle_http_req(#{method := get} = _HttpRequest, State) -> end, FullPath = join("/", lists:reverse(ResolvedPath)), ?TRACE("App: ~p PathSuffix: ~p FullPath: ~p", [App, ResolvedPath, FullPath]), + %% Check if client accepts gzip encoding + AcceptEncoding = get_accept_encoding(HttpRequest), + AcceptsGzip = accepts_gzip(AcceptEncoding), try - case atomvm:read_priv(App, FullPath) of - undefined -> - io:format("httpd_file_handler: file not found - app=~p path=~p~n", [App, FullPath]), - {error, not_found}; - Data when is_binary(Data) -> - {close, #{"Content-Type" => get_content_type(lists:reverse(ResolvedPath))}, Data} - end + serve_file(App, FullPath, ResolvedPath, AcceptsGzip) catch _:Reason -> io:format("httpd_file_handler: error reading file ~p: ~p~n", [FullPath, Reason]), @@ -63,6 +60,49 @@ handle_http_req(#{method := get} = _HttpRequest, State) -> handle_http_req(_HttpRequest, _HandlerConfig) -> {error, internal_server_error}. +%% @private +%% Try to serve gzipped version if available and client accepts it +serve_file(App, FullPath, ResolvedPath, true = _AcceptsGzip) -> + GzPath = FullPath ++ ".gz", + case atomvm:read_priv(App, GzPath) of + undefined -> + %% No gzipped version, serve original + serve_file(App, FullPath, ResolvedPath, false); + Data when is_binary(Data) -> + %% Serve gzipped version with Content-Encoding header + ContentType = get_content_type(lists:reverse(ResolvedPath)), + {close, #{"Content-Type" => ContentType, "Content-Encoding" => "gzip"}, Data} + end; +serve_file(App, FullPath, ResolvedPath, false = _AcceptsGzip) -> + case atomvm:read_priv(App, FullPath) of + undefined -> + io:format("httpd_file_handler: file not found - app=~p path=~p~n", [App, FullPath]), + {error, not_found}; + Data when is_binary(Data) -> + {close, #{"Content-Type" => get_content_type(lists:reverse(ResolvedPath))}, Data} + end. + +%% @private +get_accept_encoding(#{headers := Headers}) -> + %% Try various header name formats + case maps:get(<<"Accept-Encoding">>, Headers, undefined) of + undefined -> + case maps:get(<<"accept-encoding">>, Headers, undefined) of + undefined -> <<>>; + Val -> Val + end; + Val -> Val + end; +get_accept_encoding(_) -> + <<>>. + +%% @private +accepts_gzip(AcceptEncoding) when is_binary(AcceptEncoding) -> + %% Simple check - look for "gzip" in the Accept-Encoding header + binary:match(AcceptEncoding, <<"gzip">>) =/= nomatch; +accepts_gzip(_) -> + false. + %% @private join(Separator, Path) -> join(Separator, Path, []). From 1dbf366067b64056b6fdcfc182bf9c182f829c0c Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 18:05:15 -0500 Subject: [PATCH 14/41] Refactor try_send_binary to improve partial send handling; reduce wait times for socket buffer management --- src/gen_tcp_server.erl | 30 +++++++----------------------- 1 file changed, 7 insertions(+), 23 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index 276bb80..f17c9ff 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -212,45 +212,31 @@ try_send_binary(Socket, Packet) when is_binary(Packet) -> <> = Packet, case socket:send(Socket, Chunk) of ok -> - %% Give the scheduler a chance to run and let TCP drain - maybe_yield(Rest), try_send_binary(Socket, Rest); {ok, Remaining} -> - %% Partial send - wait for buffer to drain, then retry - receive after 20 -> ok end, + %% Partial send - send remaining then continue with rest case try_send_binary(Socket, Remaining) of ok -> try_send_binary(Socket, Rest); Error -> Error end; {error, eagain} -> - %% Socket buffer full, wait and retry - receive after 50 -> ok end, + %% Socket buffer full, brief pause and retry + receive after 5 -> ok end, try_send_binary(Socket, Packet); {error, ewouldblock} -> - %% Socket buffer full, wait and retry - receive after 50 -> ok end, + receive after 5 -> ok end, try_send_binary(Socket, Packet); {error, timeout} -> - %% Send timeout, retry - receive after 50 -> ok end, + receive after 5 -> ok end, try_send_binary(Socket, Packet); {error, closed} -> {error, closed}; {error, ebadf} -> - %% Socket was closed/invalidated {error, ebadf}; {error, Reason} -> - io:format("ERROR ~p (~p unsent)~n", [Reason, byte_size(Rest)]), {error, Reason} end. -%% Lightweight yield using receive timeout - works in AtomVM -maybe_yield(<<>>) -> - ok; -maybe_yield(_) -> - %% Brief yield to let TCP drain - keep it short to avoid client timeouts - receive after 1 -> ok end. - is_string([]) -> true; is_string([H | T]) when is_integer(H) -> @@ -269,10 +255,8 @@ try_close(Socket) -> %% @private graceful_close(Socket) -> - %% ESP32 lwIP needs time to drain the send buffer before close - %% Without this delay, close() may RST the connection before all data is sent - %% TODO: find a better way to determine when send buffer is empty - receive after 100 -> ok end, + %% Brief pause to let lwIP finish transmitting before close + receive after 10 -> ok end, try_close(Socket). %% @private From 17826d71a2d6e75579a3b9a972497751f4438619 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 18:12:04 -0500 Subject: [PATCH 15/41] Add logging for gzip file serving in serve_file function; improve error visibility --- src/httpd_file_handler.erl | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/httpd_file_handler.erl b/src/httpd_file_handler.erl index 9649046..530f253 100644 --- a/src/httpd_file_handler.erl +++ b/src/httpd_file_handler.erl @@ -67,9 +67,11 @@ serve_file(App, FullPath, ResolvedPath, true = _AcceptsGzip) -> case atomvm:read_priv(App, GzPath) of undefined -> %% No gzipped version, serve original + io:format("No gzip for ~s, serving original~n", [FullPath]), serve_file(App, FullPath, ResolvedPath, false); Data when is_binary(Data) -> %% Serve gzipped version with Content-Encoding header + io:format("Serving ~s.gz (~p bytes, gzipped)~n", [FullPath, byte_size(Data)]), ContentType = get_content_type(lists:reverse(ResolvedPath)), {close, #{"Content-Type" => ContentType, "Content-Encoding" => "gzip"}, Data} end; @@ -79,6 +81,7 @@ serve_file(App, FullPath, ResolvedPath, false = _AcceptsGzip) -> io:format("httpd_file_handler: file not found - app=~p path=~p~n", [App, FullPath]), {error, not_found}; Data when is_binary(Data) -> + io:format("Serving ~s (~p bytes, uncompressed)~n", [FullPath, byte_size(Data)]), {close, #{"Content-Type" => get_content_type(lists:reverse(ResolvedPath))}, Data} end. From 15a5c6677c540fc8edc3fbe8d16c3629cf9f82fc Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 18:16:12 -0500 Subject: [PATCH 16/41] Increase wait time in graceful_close to ensure lwIP completes transmission before socket closure --- src/gen_tcp_server.erl | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index f17c9ff..40713d3 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -255,8 +255,9 @@ try_close(Socket) -> %% @private graceful_close(Socket) -> - %% Brief pause to let lwIP finish transmitting before close - receive after 10 -> ok end, + %% Wait for lwIP to finish transmitting before close + %% 30KB @ ~1Mbps = ~240ms, add buffer for TCP ACKs + receive after 500 -> ok end, try_close(Socket). %% @private From 9d77a98478d5b4f50416c21e43ed1956d6aeb023 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 18:25:55 -0500 Subject: [PATCH 17/41] Improve graceful_close to ensure proper socket shutdown and data transmission --- src/gen_tcp_server.erl | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index 40713d3..0149c2f 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -255,9 +255,14 @@ try_close(Socket) -> %% @private graceful_close(Socket) -> - %% Wait for lwIP to finish transmitting before close - %% 30KB @ ~1Mbps = ~240ms, add buffer for TCP ACKs - receive after 500 -> ok end, + %% Shutdown write side to send FIN, allowing buffered data to drain + %% This is non-blocking and lets TCP stack finish transmitting + case socket:shutdown(Socket, write) of + ok -> ok; + {error, _} -> ok %% Ignore errors (socket may already be closed) + end, + %% Brief delay then close - FIN has been queued + receive after 50 -> ok end, try_close(Socket). %% @private From 1fa56136254be1afa8af3d57834ec6d78530368a Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 18:30:08 -0500 Subject: [PATCH 18/41] Refactor graceful_close to allow client-side socket closure; add logging for content length in create_reply function --- src/gen_tcp_server.erl | 15 +++++---------- src/httpd.erl | 1 + 2 files changed, 6 insertions(+), 10 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index 0149c2f..20a13a5 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -254,16 +254,11 @@ try_close(Socket) -> end. %% @private -graceful_close(Socket) -> - %% Shutdown write side to send FIN, allowing buffered data to drain - %% This is non-blocking and lets TCP stack finish transmitting - case socket:shutdown(Socket, write) of - ok -> ok; - {error, _} -> ok %% Ignore errors (socket may already be closed) - end, - %% Brief delay then close - FIN has been queued - receive after 50 -> ok end, - try_close(Socket). +graceful_close(_Socket) -> + %% Don't close the socket ourselves - let the client close it + %% after receiving all data. The Connection: close header tells + %% the client to close, and we'll clean up when we get tcp_closed. + ok. %% @private set_socket_options(Socket, SocketOptions) -> diff --git a/src/httpd.erl b/src/httpd.erl index a5794aa..7b0581f 100644 --- a/src/httpd.erl +++ b/src/httpd.erl @@ -593,6 +593,7 @@ create_reply(StatusCode, ContentType, Reply) when is_list(ContentType) orelse is create_reply(StatusCode, #{"Content-Type" => ContentType}, Reply); create_reply(StatusCode, Headers, Reply) when is_map(Headers) -> ReplyLen = erlang:iolist_size(Reply), + io:format("Content-Length: ~p, actual body size: ~p~n", [ReplyLen, erlang:iolist_size(Reply)]), HeadersWithLen = ensure_content_length(Headers, ReplyLen), [ <<"HTTP/1.1 ">>, erlang:integer_to_binary(StatusCode), <<" ">>, moniker(StatusCode), From 645560b45be4b2753869bbce65780c00a632a0ba Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 18:33:17 -0500 Subject: [PATCH 19/41] Add logging for send errors in handle_info; confirm successful sends --- src/gen_tcp_server.erl | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index 20a13a5..738cdb6 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -137,7 +137,8 @@ handle_info({tcp, Socket, Packet}, State) -> case try_send(Socket, ResponsePacket) of ok -> {noreply, State#state{handler_state=ResponseState}}; - {error, _} -> + {error, Reason} -> + io:format("Send error: ~p~n", [Reason]), {noreply, State#state{handler_state=ResponseState}} end; {noreply, ResponseState} -> @@ -147,8 +148,10 @@ handle_info({tcp, Socket, Packet}, State) -> ?TRACE("Sending reply to endpoint ~p and closing socket: ~p", [socket:peername(Socket), Socket]), case try_send(Socket, ResponsePacket) of ok -> + io:format("Send complete~n"), graceful_close(Socket); - {error, _} -> + {error, Reason} -> + io:format("Send error on close: ~p~n", [Reason]), try_close(Socket) end, {noreply, State}; From 9d6e5579f234a9bbe225947afc10964a03d8abb4 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 18:41:29 -0500 Subject: [PATCH 20/41] Refactor send handling in handle_info to use spawning for non-blocking sends; remove redundant logging in create_reply and serve_file functions --- src/gen_tcp_server.erl | 41 +++++++++++++++++++------------------- src/httpd.erl | 1 - src/httpd_file_handler.erl | 4 ---- 3 files changed, 21 insertions(+), 25 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index 738cdb6..366e296 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -134,26 +134,28 @@ handle_info({tcp, Socket, Packet}, State) -> case Handler:handle_receive(Socket, Packet, HandlerState) of {reply, ResponsePacket, ResponseState} -> ?TRACE("Sending reply to endpoint ~p", [socket:peername(Socket)]), - case try_send(Socket, ResponsePacket) of - ok -> - {noreply, State#state{handler_state=ResponseState}}; - {error, Reason} -> - io:format("Send error: ~p~n", [Reason]), - {noreply, State#state{handler_state=ResponseState}} - end; + %% Spawn send to avoid blocking other requests + spawn(fun() -> + case try_send(Socket, ResponsePacket) of + ok -> ok; + {error, _} -> ok + end + end), + {noreply, State#state{handler_state=ResponseState}}; {noreply, ResponseState} -> ?TRACE("no reply", []), {noreply, State#state{handler_state=ResponseState}}; {close, ResponsePacket} -> ?TRACE("Sending reply to endpoint ~p and closing socket: ~p", [socket:peername(Socket), Socket]), - case try_send(Socket, ResponsePacket) of - ok -> - io:format("Send complete~n"), - graceful_close(Socket); - {error, Reason} -> - io:format("Send error on close: ~p~n", [Reason]), - try_close(Socket) - end, + %% Spawn send to avoid blocking other requests + spawn(fun() -> + case try_send(Socket, ResponsePacket) of + ok -> + graceful_close(Socket); + {error, _} -> + try_close(Socket) + end + end), {noreply, State}; close -> ?TRACE("Closing socket ~p", [Socket]), @@ -257,11 +259,10 @@ try_close(Socket) -> end. %% @private -graceful_close(_Socket) -> - %% Don't close the socket ourselves - let the client close it - %% after receiving all data. The Connection: close header tells - %% the client to close, and we'll clean up when we get tcp_closed. - ok. +graceful_close(Socket) -> + %% Brief delay to let TCP finish, then close + receive after 50 -> ok end, + try_close(Socket). %% @private set_socket_options(Socket, SocketOptions) -> diff --git a/src/httpd.erl b/src/httpd.erl index 7b0581f..a5794aa 100644 --- a/src/httpd.erl +++ b/src/httpd.erl @@ -593,7 +593,6 @@ create_reply(StatusCode, ContentType, Reply) when is_list(ContentType) orelse is create_reply(StatusCode, #{"Content-Type" => ContentType}, Reply); create_reply(StatusCode, Headers, Reply) when is_map(Headers) -> ReplyLen = erlang:iolist_size(Reply), - io:format("Content-Length: ~p, actual body size: ~p~n", [ReplyLen, erlang:iolist_size(Reply)]), HeadersWithLen = ensure_content_length(Headers, ReplyLen), [ <<"HTTP/1.1 ">>, erlang:integer_to_binary(StatusCode), <<" ">>, moniker(StatusCode), diff --git a/src/httpd_file_handler.erl b/src/httpd_file_handler.erl index 530f253..17e9187 100644 --- a/src/httpd_file_handler.erl +++ b/src/httpd_file_handler.erl @@ -67,21 +67,17 @@ serve_file(App, FullPath, ResolvedPath, true = _AcceptsGzip) -> case atomvm:read_priv(App, GzPath) of undefined -> %% No gzipped version, serve original - io:format("No gzip for ~s, serving original~n", [FullPath]), serve_file(App, FullPath, ResolvedPath, false); Data when is_binary(Data) -> %% Serve gzipped version with Content-Encoding header - io:format("Serving ~s.gz (~p bytes, gzipped)~n", [FullPath, byte_size(Data)]), ContentType = get_content_type(lists:reverse(ResolvedPath)), {close, #{"Content-Type" => ContentType, "Content-Encoding" => "gzip"}, Data} end; serve_file(App, FullPath, ResolvedPath, false = _AcceptsGzip) -> case atomvm:read_priv(App, FullPath) of undefined -> - io:format("httpd_file_handler: file not found - app=~p path=~p~n", [App, FullPath]), {error, not_found}; Data when is_binary(Data) -> - io:format("Serving ~s (~p bytes, uncompressed)~n", [FullPath, byte_size(Data)]), {close, #{"Content-Type" => get_content_type(lists:reverse(ResolvedPath))}, Data} end. From 07e7ffc171a2161cc8c2873e8c630ac675cfd3f8 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 18:48:02 -0500 Subject: [PATCH 21/41] Add logging for send completion and errors in try_send_binary function --- src/gen_tcp_server.erl | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index 366e296..c8eff5c 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -210,6 +210,7 @@ try_send_iolist(Socket, [H | T]) -> end. try_send_binary(_Socket, <<>>) -> + io:format("Send complete~n"), ok; try_send_binary(Socket, Packet) when is_binary(Packet) -> TotalSize = byte_size(Packet), @@ -220,23 +221,29 @@ try_send_binary(Socket, Packet) when is_binary(Packet) -> try_send_binary(Socket, Rest); {ok, Remaining} -> %% Partial send - send remaining then continue with rest + io:format("Partial: ~p bytes~n", [byte_size(Remaining)]), case try_send_binary(Socket, Remaining) of ok -> try_send_binary(Socket, Rest); Error -> Error end; {error, eagain} -> %% Socket buffer full, brief pause and retry + io:format("eagain~n"), receive after 5 -> ok end, try_send_binary(Socket, Packet); {error, ewouldblock} -> + io:format("ewouldblock~n"), receive after 5 -> ok end, try_send_binary(Socket, Packet); {error, timeout} -> + io:format("timeout~n"), receive after 5 -> ok end, try_send_binary(Socket, Packet); {error, closed} -> + io:format("closed~n"), {error, closed}; {error, ebadf} -> + io:format("ebadf~n"), {error, ebadf}; {error, Reason} -> {error, Reason} From d33bbbe47decb11f55fd57fe4020aa852aaacfc2 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 19:05:36 -0500 Subject: [PATCH 22/41] Add logging for send operation size and errors in handle_info --- src/gen_tcp_server.erl | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index c8eff5c..291b615 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -149,10 +149,14 @@ handle_info({tcp, Socket, Packet}, State) -> ?TRACE("Sending reply to endpoint ~p and closing socket: ~p", [socket:peername(Socket), Socket]), %% Spawn send to avoid blocking other requests spawn(fun() -> + Size = erlang:iolist_size(ResponsePacket), + io:format("Starting send: ~p bytes~n", [Size]), case try_send(Socket, ResponsePacket) of ok -> + io:format("Finished send: ~p bytes~n", [Size]), graceful_close(Socket); - {error, _} -> + {error, Reason} -> + io:format("Send failed after starting: ~p~n", [Reason]), try_close(Socket) end end), @@ -305,11 +309,13 @@ loop(ControllingProcess, Connection) -> ControllingProcess ! {tcp, Connection, Data}, loop(ControllingProcess, Connection); {error, closed} -> + io:format("recv: closed~n"), ControllingProcess ! {tcp_closed, Connection}, ok; - {error, _Reason} -> + {error, Reason} -> %% Don't close the socket here! The handler may still be sending. %% Just notify the controlling process and let it handle cleanup. + io:format("recv error: ~p~n", [Reason]), ControllingProcess ! {tcp_closed, Connection}, ok end. From ea36293b31f6979996b99ba6889a22db9841799a Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 19:07:48 -0500 Subject: [PATCH 23/41] Refactor handle_info to use loop process for non-blocking sends; improve response handling and closure logic --- src/gen_tcp_server.erl | 69 ++++++++++++++++++------------------------ 1 file changed, 30 insertions(+), 39 deletions(-) diff --git a/src/gen_tcp_server.erl b/src/gen_tcp_server.erl index 291b615..8ce8dac 100644 --- a/src/gen_tcp_server.erl +++ b/src/gen_tcp_server.erl @@ -128,46 +128,31 @@ handle_info({tcp_closed, Socket}, State) -> #state{handler=Handler, handler_state=HandlerState} = State, NewHandlerState = Handler:handle_tcp_closed(Socket, HandlerState), {noreply, State#state{handler_state=NewHandlerState}}; -handle_info({tcp, Socket, Packet}, State) -> +handle_info({tcp, Socket, Packet, LoopPid}, State) -> #state{handler=Handler, handler_state=HandlerState} = State, ?TRACE("received packet: len(~p) from ~p", [erlang:byte_size(Packet), socket:peername(Socket)]), case Handler:handle_receive(Socket, Packet, HandlerState) of {reply, ResponsePacket, ResponseState} -> ?TRACE("Sending reply to endpoint ~p", [socket:peername(Socket)]), - %% Spawn send to avoid blocking other requests - spawn(fun() -> - case try_send(Socket, ResponsePacket) of - ok -> ok; - {error, _} -> ok - end - end), + %% Send response back to loop process for sending + LoopPid ! {send, ResponsePacket, keep_open}, {noreply, State#state{handler_state=ResponseState}}; {noreply, ResponseState} -> ?TRACE("no reply", []), + LoopPid ! continue, {noreply, State#state{handler_state=ResponseState}}; {close, ResponsePacket} -> ?TRACE("Sending reply to endpoint ~p and closing socket: ~p", [socket:peername(Socket), Socket]), - %% Spawn send to avoid blocking other requests - spawn(fun() -> - Size = erlang:iolist_size(ResponsePacket), - io:format("Starting send: ~p bytes~n", [Size]), - case try_send(Socket, ResponsePacket) of - ok -> - io:format("Finished send: ~p bytes~n", [Size]), - graceful_close(Socket); - {error, Reason} -> - io:format("Send failed after starting: ~p~n", [Reason]), - try_close(Socket) - end - end), + %% Send response back to loop process for sending, then close + LoopPid ! {send, ResponsePacket, close}, {noreply, State}; close -> ?TRACE("Closing socket ~p", [Socket]), - try_close(Socket), + LoopPid ! close, {noreply, State}; _SomethingElse -> ?TRACE("Unexpected response from handler ~p: ~p", [Handler, _SomethingElse]), - try_close(Socket), + LoopPid ! close, {noreply, State} end; handle_info(Info, State) -> @@ -214,7 +199,6 @@ try_send_iolist(Socket, [H | T]) -> end. try_send_binary(_Socket, <<>>) -> - io:format("Send complete~n"), ok; try_send_binary(Socket, Packet) when is_binary(Packet) -> TotalSize = byte_size(Packet), @@ -225,29 +209,23 @@ try_send_binary(Socket, Packet) when is_binary(Packet) -> try_send_binary(Socket, Rest); {ok, Remaining} -> %% Partial send - send remaining then continue with rest - io:format("Partial: ~p bytes~n", [byte_size(Remaining)]), case try_send_binary(Socket, Remaining) of ok -> try_send_binary(Socket, Rest); Error -> Error end; {error, eagain} -> %% Socket buffer full, brief pause and retry - io:format("eagain~n"), receive after 5 -> ok end, try_send_binary(Socket, Packet); {error, ewouldblock} -> - io:format("ewouldblock~n"), receive after 5 -> ok end, try_send_binary(Socket, Packet); {error, timeout} -> - io:format("timeout~n"), receive after 5 -> ok end, try_send_binary(Socket, Packet); {error, closed} -> - io:format("closed~n"), {error, closed}; {error, ebadf} -> - io:format("ebadf~n"), {error, ebadf}; {error, Reason} -> {error, Reason} @@ -271,8 +249,9 @@ try_close(Socket) -> %% @private graceful_close(Socket) -> - %% Brief delay to let TCP finish, then close - receive after 50 -> ok end, + %% Shutdown write side to signal we're done, then wait for TCP to flush + _ = socket:shutdown(Socket, write), + receive after 100 -> ok end, try_close(Socket). %% @private @@ -306,16 +285,28 @@ loop(ControllingProcess, Connection) -> case socket:recv(Connection) of {ok, Data} -> ?TRACE("Received data ~p on connection ~p", [Data, Connection]), - ControllingProcess ! {tcp, Connection, Data}, - loop(ControllingProcess, Connection); + ControllingProcess ! {tcp, Connection, Data, self()}, + %% Wait for response from gen_server + receive + {send, ResponsePacket, Action} -> + case try_send(Connection, ResponsePacket) of + ok -> + case Action of + keep_open -> loop(ControllingProcess, Connection); + close -> graceful_close(Connection) + end; + {error, _} -> + try_close(Connection) + end; + continue -> + loop(ControllingProcess, Connection); + close -> + try_close(Connection) + end; {error, closed} -> - io:format("recv: closed~n"), ControllingProcess ! {tcp_closed, Connection}, ok; - {error, Reason} -> - %% Don't close the socket here! The handler may still be sending. - %% Just notify the controlling process and let it handle cleanup. - io:format("recv error: ~p~n", [Reason]), + {error, _Reason} -> ControllingProcess ! {tcp_closed, Connection}, ok end. From 84a3197062d990bc7ffd1480bc4e5ef49c5a7484 Mon Sep 17 00:00:00 2001 From: harmon25 Date: Sun, 11 Jan 2026 19:11:26 -0500 Subject: [PATCH 24/41] adds example code --- TODO.md | 15 + example/.gitignore | 3 + example/LICENSE | 190 +++++++++ example/README.md | 7 + example/priv/favicon.ico | Bin 0 -> 15406 bytes example/priv/index.html | 165 ++++++++ example/priv/index.html.gz | Bin 0 -> 1880 bytes example/priv/js/app.js | 120 ++++++ example/priv/js/app.js.gz | Bin 0 -> 1116 bytes example/priv/js/lib/backbone-1.3.3-min.js | 2 + example/priv/js/lib/backbone-1.3.3-min.js.gz | Bin 0 -> 7582 bytes example/priv/js/lib/backbone-min.map | 1 + example/priv/js/lib/jquery-3.1.1-min.js | 4 + example/priv/js/lib/jquery-3.1.1-min.js.gz | Bin 0 -> 30140 bytes example/priv/js/lib/underscore-1.8.3-min.js | 6 + .../priv/js/lib/underscore-1.8.3-min.js.gz | Bin 0 -> 5869 bytes example/priv/js/lib/underscore-min.map | 1 + example/priv/w3.css | 361 ++++++++++++++++++ example/priv/w3.css.gz | Bin 0 -> 6707 bytes example/rebar.config | 11 + example/rebar.lock | 7 + example/src/config.erl-template | 32 ++ example/src/httpd_example.app.src | 12 + example/src/httpd_example.erl | 242 ++++++++++++ 24 files changed, 1179 insertions(+) create mode 100644 example/.gitignore create mode 100644 example/LICENSE create mode 100644 example/README.md create mode 100755 example/priv/favicon.ico create mode 100755 example/priv/index.html create mode 100755 example/priv/index.html.gz create mode 100755 example/priv/js/app.js create mode 100755 example/priv/js/app.js.gz create mode 100755 example/priv/js/lib/backbone-1.3.3-min.js create mode 100755 example/priv/js/lib/backbone-1.3.3-min.js.gz create mode 100755 example/priv/js/lib/backbone-min.map create mode 100755 example/priv/js/lib/jquery-3.1.1-min.js create mode 100755 example/priv/js/lib/jquery-3.1.1-min.js.gz create mode 100755 example/priv/js/lib/underscore-1.8.3-min.js create mode 100755 example/priv/js/lib/underscore-1.8.3-min.js.gz create mode 100755 example/priv/js/lib/underscore-min.map create mode 100755 example/priv/w3.css create mode 100755 example/priv/w3.css.gz create mode 100644 example/rebar.config create mode 100644 example/rebar.lock create mode 100644 example/src/config.erl-template create mode 100644 example/src/httpd_example.app.src create mode 100644 example/src/httpd_example.erl diff --git a/TODO.md b/TODO.md index 805fe97..accf0f4 100644 --- a/TODO.md +++ b/TODO.md @@ -83,6 +83,19 @@ Tracking document for memory leak and VM stability issues identified during code --- +## Code Quality Improvements + +### 9. ✅ Replace custom iolist_length with erlang:iolist_size +**File:** `src/httpd.erl` line 582 + +**Problem:** Used custom `iolist_length/1` function instead of the standard `erlang:iolist_size/1` BIF which is available in AtomVM. Custom implementation works correctly but adds unnecessary code maintenance burden. + +**Solution:** Replace with `erlang:iolist_size/1` and remove custom function. + +**Status:** Fixed - replaced custom implementation with standard BIF, all tests passing. + +--- + ## Progress Log | Date | Issue # | Status | Notes | @@ -90,6 +103,8 @@ Tracking document for memory leak and VM stability issues identified during code | 2024-12-07 | - | - | Initial review and documentation | | 2024-12-07 | 5 | ✅ | Fixed map update operator in httpd.erl | | 2024-12-07 | 1 | ✅ | Fixed accept loop crash recovery in gen_tcp_server.erl | +| 2026-01-11 | 9 | ✅ | Replaced custom iolist_length with erlang:iolist_size/1 | +| 2026-01-11 | - | - | Added comprehensive iolist handler tests | --- diff --git a/example/.gitignore b/example/.gitignore new file mode 100644 index 0000000..45e12e5 --- /dev/null +++ b/example/.gitignore @@ -0,0 +1,3 @@ +src/config.erl +_build/ +.DS_Store \ No newline at end of file diff --git a/example/LICENSE b/example/LICENSE new file mode 100644 index 0000000..efdacd2 --- /dev/null +++ b/example/LICENSE @@ -0,0 +1,190 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + Copyright 2020, Fred Dushin . + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/example/README.md b/example/README.md new file mode 100644 index 0000000..9e119ef --- /dev/null +++ b/example/README.md @@ -0,0 +1,7 @@ +# atomvm_app + +Welcome to the atomvm_app AtomVM application. + +To build and flash this application to your ESP32 device, issue the `esp32_flash` target + + shell$ rebar3 esp32_flash diff --git a/example/priv/favicon.ico b/example/priv/favicon.ico new file mode 100755 index 0000000000000000000000000000000000000000..b7163334e1933a7f10a19750e59a41bbdc309a14 GIT binary patch literal 15406 zcmeI22XIzJ5XWB{0RkkUN=;Bix=|n!S`d(41QK*a9s6L%iUn*q_TCj06&s-!rCC4` z11KW{C^o7Rx-?Cw>;3l2eZ2SO3j)pT=9ZE0zR{q-GZeig@QV8$2{LlI~vCpc#Ji#;U&wZIs3zV7A> zS(gcP17~~af4HEj?0lx1EX!`B?VIlF zAZu@GB^!pdm)~w}Eq}ezOXjt#q5P<~KGexW|LaxF<&%09W&4v|WZygeWPYn!vSma^ z+5LPE`LcO+**H8?CRd1;{qOac={3vC`a9Zs=(j!ES^jwJ9BpF^{CB_5LkeE+qtCmZ z>#p*#UfTbBsi%kD>LCK_e{%-@%^6hMuukD98u2r!rgSg`|5V&h?sKALY}POtlfB_T z+au;;PUaqyHT*xDH`JE~=FTgz`E#;Ma_$r5ocikswQK)>#MuOKNZwuTv~0XLGbsOt z;q8O%yzAY*YSaB4Wc^U@`})B910?V603T?LUsoF5+m=7?ZZ{vE;WfQRd6`^3UgHVq z;6;ouC8@N0R5d~44NG_M!z`Ivv5bt1ix%Q3+m4L0>L$s=vT;gFj6>hzuJvSE<+93$ z7{-ow*Tg=|f8c`vjrJKin437uJ$B~hZO|_2R9A@6 z+%c#0Senn~qLsV>}OiTRfFIZfleIZdj1c%tVSwJK;EvEP?xR@dhR znJKdTyvClfZk{|Z8_-Di;fFy@g@P`>?Q)8T2Axh!h!bKn?1nvX+XlK}9q5tRZd`1% z5T||Jy0)yiu$hNf==?jM?Ish-#LE76`-|P<%_F=qDRC#ZVrjoP<0M&e(ILK!pIWJm z#**k^VP>iZeQ6f^?QXv?g9%cT0v~C+xkoVLOf(*2crM5jVT{d)p(OWpZM? zeBGwD5I+;+eq6nrAm=YvdgF7;(_R03*%=xqqj&bt-G{A@FBKy@pY9fHC$6S#$CF*P zZTk~l^#6p?vGV83J%f70j_fyto2UDk`Pe7;O)6JPc03*6$r$)@9_d3i+xPu>P4tX% z7Wgjsrt`^?<2d5BOKg?4xy`BtzkS^E+UGSloF%NEvhJpg;2P;Cw*UF^Kp(ZWIlf0M z&GyH;$f|2w>VNy)04-yo;rj@E+4=nXsK4)h-5GoG?dF8hK}miC<(2sNX9<6Q7nc|K zzqFGlF)3Q-5>pPBCo$cQ@i~byZs3Kc&NVSf{&DMr0f%jqWF_uS?h5DEU!}JBQ941#)$^kD9!lJI`-p**$OemBroaY0jJ+ zvu(FEIb?E@n$Iqri(Dad*fF8~$ac6K;a@NJl21;psCn(N(NUV8C*N#&?itlru?ceD z^pA~+Qmi1Hd~0uPB@@fU=@`~&d05%@y?w4?02AV4B`3(WifCgGX4g&DbH;z}9(`0L zL1xxT3`=kMgx2sSuaBO=1#AHmq8*$nl*azgZC6KeBE8RJaHKg+t17M&YG;i9@uJgJ z7vKZ@2Y-P7v`S_5tb!Y1gJ3t7|B=+(OTxy%*|_Iq3pO<_CR%aHaD1?H&Lnn?uV62s zVL$LEp)~k2_Q(1b@JV#VnPpF~JJ#}f!zx8+LwULXBM0XWd?|Ql%$WmwK^N}(WNtd{ ze2tHb@th6p3H&p+ZJi=EjDH>`Q48@otbz9jSQ9=MOvopY#$gMGUF4_4YmR;XCFS`VpEgNTAJ4g z^0T!6RBw5(qvBuK0%NT&0S6983qA>^J=dJ?gCBVP7PQ#as%z6dwAct|3JiBja%q{L zQCs(D?GV~y0_}$9{ES*2x^VM{wsGF@LFf%ToSBj+Gip|l{EOVb7wQ zA9`mmIrm_=wh#X{)|@B&JL}+%0Da6oC9$-&kLNs@^;w!Dsj&rY96yAwWZp@}hOwPc zdd|nLXS?g3bN;Ziz2^OD@m*|@y9wNd1YgFc;g5{yAAdvPo}$}FE$Q1J*oO`5AAM-u zp)!R22T%RDS~=a*oG2&Y6U=))+# zdQDk%bxYN+m7o1{%fUMFP4uG|bjP~gV~TsmUgw!J6D%!i=y?t|9!!0n=?{)IbW8g+ z490a^AMT{S$KAg?yRrIHFn8K>+tg7^+s&W2kb4zMXZRBaJwV2Pk+Dt z{q}9Zw*lVi wrote this file. You are hereby granted permission to +copy, modify, or mutilate this file without restriction. If you create a +work derived from this file, you may optionally include a copy of this notice, +for which I would be most grateful, but you are not required to do so. +If we meet some day, and you think this stuff is worth it, you can buy me a +beer in return. Fred Dushin +---------------------------------------------------------------------------- +--> + + + + + + + AtomVM Web Console + + + +
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You are hereby granted permission to +// # copy, modify, or mutilate this file without restriction. If you create a +// # work derived from this file, you may optionally include a copy of this notice, +// # for which I would be most grateful, but you are not required to do so. +// # If we meet some day, and you think this stuff is worth it, you can buy me a +// # beer in return. Fred Dushin +// # ---------------------------------------------------------------------------- +// + +var SystemModel = Backbone.Model.extend({ + url: '/api/system_info', + defaults: { + platform: null, + system_architecture: null, + word_size: null, + atomvm_version: null, + esp32_chip_info: null, + esp_idf_version: null, + chip_model: null, + chip_cores: null, + chip_features: null, + chip_revision: null + }, + + parse: function(data) { + data["chip_model"] = data.esp32_chip_info["model"]; + data["chip_cores"] = data.esp32_chip_info["cores"]; + data["chip_features"] = data.esp32_chip_info["features"]; + data["chip_revision"] = data.esp32_chip_info["revision"]; + return data; + } +}); +var system_model = new SystemModel(); + +var SystemView = Backbone.View.extend({ + el: '#system-view', + template: _.template($('#system-tmpl').html()), + + initialize: function() { + this.listenTo(this.model, 'sync change', this.render); + this.model.fetch(); + this.render(); + }, + + render: function() { + var html = this.template(this.model.toJSON()); + this.$el.html(html); + return this; + } +}); +var system_view = new SystemView({model: system_model}) + +var MemoryModel = Backbone.Model.extend({ + url: '/api/memory', + defaults: { + atom_count: null, + port_count: null, + process_count: null, + esp32_free_heap_size: null, + esp32_largest_free_block: null, + esp32_minimum_free_size: null + }, + + parse: function(data) { + return data; + } +}); +var memory_model = new MemoryModel(); + +var MemoryView = Backbone.View.extend({ + el: '#memory-view', + template: _.template($('#memory-tmpl').html()), + + initialize: function() { + this.listenTo(this.model, 'sync change', this.render); + this.model.fetch(); + this.render(); + }, + + render: function() { + var html = this.template(this.model.toJSON()); + this.$el.html(html); + return this; + } +}); +var memory_view = new MemoryView({model: memory_model}) + +var get_websocket_url = function() { + var hostname = window.location.hostname; + var port = window.location.port; + return "ws://" + hostname + ":" + port + "/ws"; +} + +var create_websocket = function() { + var ws = new WebSocket(get_websocket_url(), []); + ws.onmessage = function (event) { + console.log("Received WS data: " + event.data); + var data = JSON.parse(event.data); + for (var key in memory_model.attributes) { + if (data[key]) { + memory_model.set(key, data[key]); + } + } + } + + ws.onopen = function (event) { + console.log("opened connection: " + event); + } + + ws.onclose = function (event) { + console.log("closed connection: " + event); + webSocket = create_websocket(); + } + return ws; +} + +var webSocket = create_websocket(); diff --git a/example/priv/js/app.js.gz b/example/priv/js/app.js.gz new file mode 100755 index 0000000000000000000000000000000000000000..c078ce2f91842e79af9cd3c8694d6cc22f19bae7 GIT binary patch literal 1116 zcmV-i1f%;OiwFp_5oBoq17UD*E^2cC?N)7%<1`Td-294B@1&->Y$_dmYB>Z4MJ(bD 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---------------------------------------------------------------------------- +// # "THE BEER-WARE LICENSE" (Revision 42): +// # wrote this file. You are hereby granted permission to +// # copy, modify, or mutilate this file without restriction. If you create a +// # work derived from this file, you may optionally include a copy of this notice, +// # for which I would be most grateful, but you are not required to do so. +// # If we meet some day, and you think this stuff is worth it, you can buy me a +// # beer in return. Fred Dushin +// # ---------------------------------------------------------------------------- +// + +var SystemModel = Backbone.Model.extend({ + url: '/api/system_info', + defaults: { + platform: null, + system_architecture: null, + word_size: null, + atomvm_version: null, + esp32_chip_info: null, + esp_idf_version: null, + chip_model: null, + chip_cores: null, + chip_features: null, + chip_revision: null + }, + + parse: function(data) { + data["chip_model"] = data.esp32_chip_info["model"]; + data["chip_cores"] = data.esp32_chip_info["cores"]; + data["chip_features"] = data.esp32_chip_info["features"]; + data["chip_revision"] = data.esp32_chip_info["revision"]; + return data; + } +}); +var system_model = new SystemModel(); + +var SystemView = Backbone.View.extend({ + el: '#system-view', + template: _.template($('#system-tmpl').html()), + + initialize: function() { + this.listenTo(this.model, 'sync change', this.render); + this.model.fetch(); + this.render(); + }, + + render: 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