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mirror of https://github.com/webui-dev/webui synced 2025-03-28 21:13:17 +00:00
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Fix big-data crash (Civetweb Issue)

Browse Source 
- For same reason, data over 97.6Kb (100000 bytes) may have data loss because of Civetweb has an issue. That's make the webui-protocol-header had incorrect data size so it crashes (over flow) if user access the most significant byte. However, WebUI won't crash now. But we should report this to Civetweb.
This commit is contained in:
Hassan DRAGA 2023-10-07 15:35:45 -04:00
parent 61a92b0da1
commit 9a78898d62
7 changed files with 367 additions and 265 deletions
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383
bridge/webui_bridge.h
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@ -1593,211 +1593,210 @@ unsigned char webui_javascript_bridge[] = {
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};

5
bridge/webui_bridge.ts
View File

@ -574,7 +574,7 @@ class WebuiBridge {
// 1: [TOKEN]
// 2: [ID]
// 3: [CMD]
// 4: [Fn, Null, {Len;Len;...}, Null, {Data,Null,Data,Null...}, Null]
// 4: [Fn, Null, {Len;Len;...}, Null, {Data,Null,Data,Null...}]
const packet = Uint8Array.of(
this.#WEBUI_SIGNATURE,
0, 0, 0, 0, // Token (4 Bytes)
@ -584,8 +584,7 @@ class WebuiBridge {
0,
...new TextEncoder().encode(argsLengths),
0,
...argsValues,
0
...argsValues
)
this.#addToken(packet, this.#token, this.#PROTOCOL_TOKEN)
this.#addID(packet, callId, this.#PROTOCOL_ID)

41
examples/C/call_c_from_js/main.c
View File

@ -57,11 +57,14 @@ void my_function_raw_binary(webui_event_t* e) {
printf("0x%02x ", raw_1[i]);
printf("\n");
// Check raw_2 (Big)
// [0xA1, 0x00..., 0xA2]
bool valid = false;
if(raw_2[0] == 0xA1 && raw_2[len_2 - 1] == 0xA2)
valid = true;
// Print raw_2
printf("my_function_raw_binary 2 (%llu bytes): ", len_2);
for (size_t i = 0; i < len_2; i++)
printf("0x%02x ", raw_2[i]);
printf("\n");
printf("my_function_raw_binary 2 big (%llu bytes): valid data? %s\n", len_2, (valid ? "Yes" : "No"));
}
void my_function_with_response(webui_event_t* e) {
@ -90,15 +93,29 @@ int main() {
" <title>Call C from JavaScript Example</title>"
" <style>"
" body {"
" background: linear-gradient(to left, #36265a, #654da9);"
" color: AliceBlue;"
" font: 16px sans-serif;"
" font-family: 'Arial', sans-serif;"
" color: white;"
" background: linear-gradient(to right, #507d91, #1c596f, #022737);"
" text-align: center;"
" margin-top: 30px;"
" font-size: 18px;"
" }"
" button, input {"
" padding: 10px;"
" margin: 10px;"
" border-radius: 3px;"
" border: 1px solid #ccc;"
" box-shadow: 0 3px 5px rgba(0,0,0,0.1);"
" transition: 0.2s;"
" }"
" button {"
" margin: 5px 0 10px;"
" background: #3498db;"
" color: #fff; "
" cursor: pointer;"
" font-size: 16px;"
" }"
" h1 { text-shadow: -7px 10px 7px rgb(67 57 57 / 76%); }"
" button:hover { background: #c9913d; }"
" input:focus { outline: none; border-color: #3498db; }"
" </style>"
" </head>"
" <body>"
@ -110,12 +127,16 @@ int main() {
" <br>"
" <button onclick=\"webui.call('MyID_Three', true, false);\">Call my_function_boolean()</button>"
" <br>"
" <button onclick=\"webui.call('MyID_RawBinary', new Uint8Array([0x41]), new Uint8Array([0x42, 0x43]));\">Call my_function_raw_binary()</button>"
" <button onclick=\"webui.call('MyID_RawBinary', new Uint8Array([0x41,0x42,0x43]), big_arr);\">Call my_function_raw_binary()</button>"
" <br>"
" <p>Call a C function that returns a response</p>"
" <button onclick=\"MyJS();\">Call my_function_with_response()</button>"
" <div>Double: <input type=\"text\" id=\"MyInputID\" value=\"2\"></div>"
" <script>"
" const arr_size = 10000;"
" const big_arr = new Uint8Array(arr_size);"
" big_arr[0] = 0xA1;"
" big_arr[arr_size - 1] = 0xA2;"
" function MyJS() {"
" const MyInput = document.getElementById('MyInputID');"
" const number = MyInput.value;"

24
examples/C/call_js_from_c/main.c
View File

@ -50,15 +50,29 @@ int main() {
" <title>Call JavaScript from C Example</title>"
" <style>"
" body {"
" background: linear-gradient(to left, #36265a, #654da9);"
" color: AliceBlue;"
" font: 16px sans-serif;"
" font-family: 'Arial', sans-serif;"
" color: white;"
" background: linear-gradient(to right, #507d91, #1c596f, #022737);"
" text-align: center;"
" margin-top: 30px;"
" font-size: 18px;"
" }"
" button, input {"
" padding: 10px;"
" margin: 10px;"
" border-radius: 3px;"
" border: 1px solid #ccc;"
" box-shadow: 0 3px 5px rgba(0,0,0,0.1);"
" transition: 0.2s;"
" }"
" button {"
" margin: 5px 0 10px;"
" background: #3498db;"
" color: #fff; "
" cursor: pointer;"
" font-size: 16px;"
" }"
" h1 { text-shadow: -7px 10px 7px rgb(67 57 57 / 76%); }"
" button:hover { background: #c9913d; }"
" input:focus { outline: none; border-color: #3498db; }"
" </style>"
" </head>"
" <body>"

25
examples/C/serve_a_folder/index.html
View File

@ -5,14 +5,29 @@
<title>WebUI - Serve a Folder Example (C99)</title>
<style>
body {
font-family: 'Arial', sans-serif;
color: white;
background: #0F2027;
background: -webkit-linear-gradient(to right, #3e6983, #314562, #10273e);
background: linear-gradient(to right, #3e6983, #314562, #10273e);
background: linear-gradient(to right, #507d91, #1c596f, #022737);
text-align: center;
font-size: 16px;
font-family: sans-serif;
font-size: 18px;
}
button, input {
padding: 10px;
border-radius: 3px;
border: 1px solid #ccc;
box-shadow: 0 3px 5px rgba(0,0,0,0.1);
transition: 0.2s;
}
button {
background: #3498db;
color: #fff;
cursor: pointer;
font-size: 16px;
}
h1 { text-shadow: -7px 10px 7px rgb(67 57 57 / 76%); }
button:hover { background: #c9913d; }
input:focus { outline: none; border-color: #3498db; }
a:link{color:#fd5723}
a:active{color:#fd5723}
a:visited{color:#fd5723}

24
examples/C/serve_a_folder/second.html
View File

@ -5,14 +5,28 @@
<title>WebUI - Second Page (C99)</title>
<style>
body {
font-family: 'Arial', sans-serif;
color: white;
background: #0F2027;
background: -webkit-linear-gradient(to right, #3e6983, #314562, #10273e);
background: linear-gradient(to right, #3e6983, #314562, #10273e);
background: linear-gradient(to right, #507d91, #1c596f, #022737);
text-align: center;
font-size: 16px;
font-family: sans-serif;
font-size: 18px;
}
button, input {
padding: 10px;
border-radius: 3px;
border: 1px solid #ccc;
box-shadow: 0 3px 5px rgba(0,0,0,0.1);
transition: 0.2s;
}
button {
background: #3498db;
color: #fff;
cursor: pointer;
font-size: 16px;
}
h1 { text-shadow: -7px 10px 7px rgb(67 57 57 / 76%); }
button:hover { background: #c9913d; }
input:focus { outline: none; border-color: #3498db; }
</style>
</head>
<body>

56
src/webui.c
View File

@ -5205,6 +5205,9 @@ static size_t _webui_set_cb_index(char* webui_internal_id) {
}
static void _webui_print_ascii(const char* data, size_t len) {
for (size_t i = 0; i < len; i++) {
if((unsigned char)*data == 0x00)
putchar(0xCF); // ¤
else
printf("%c", (unsigned char)*data);
data++;
}
@ -5994,7 +5997,7 @@ static WEBUI_THREAD_SERVER_START
static void _webui_receive(_webui_window_t* win, int event_type, void* data, size_t len) {
#ifdef WEBUI_LOG
printf("[Core]\t\t_webui_receive()...\n");
printf("[Core]\t\t_webui_receive([%zu], [%d], [%zu])...\n", win->window_number, event_type, len);
#endif
static size_t recvNum = 0;
@ -6045,7 +6048,7 @@ static WEBUI_THREAD_RECEIVE
// Get arguments
_webui_recv_arg_t* arg = (_webui_recv_arg_t*) _arg;
_webui_window_t* win = arg->win;
size_t len = arg->len;
size_t packet_len = arg->len;
size_t recvNum = arg->recvNum;
size_t event_type = arg->event_type;
void* ptr = arg->ptr;
@ -6064,18 +6067,18 @@ static WEBUI_THREAD_RECEIVE
#ifdef WEBUI_LOG
printf("[Core]\t\t[Thread %zu] _webui_receive_thread() -> Data received...\n", recvNum);
printf("[Core]\t\t[Thread %zu] _webui_receive_thread() -> Packet Size : %zu bytes\n", recvNum, len);
printf("[Core]\t\t[Thread %zu] _webui_receive_thread() -> Packet Size : %zu bytes\n", recvNum, packet_len);
printf("[Core]\t\t[Thread %zu] _webui_receive_thread() -> Packet Header : [ ", recvNum);
_webui_print_hex(packet, WEBUI_PROTOCOL_SIZE);
printf("]\n");
printf("[Core]\t\t[Thread %zu] _webui_receive_thread() -> Packet Token: 0x%08X (%" PRIu32 ")\n", recvNum, packet_token, packet_token);
printf("[Core]\t\t[Thread %zu] _webui_receive_thread() -> Packet ID: 0x%04X (%u)\n", recvNum, packet_id, packet_id);
printf("[Core]\t\t[Thread %zu] _webui_receive_thread() -> Packet Data: [", recvNum);
_webui_print_ascii(&packet[WEBUI_PROTOCOL_DATA], (len - WEBUI_PROTOCOL_SIZE));
_webui_print_ascii(&packet[WEBUI_PROTOCOL_DATA], (packet_len - WEBUI_PROTOCOL_SIZE));
printf("]\n");
#endif
if(len >= WEBUI_PROTOCOL_SIZE && (unsigned char)packet[WEBUI_PROTOCOL_SIGN] == WEBUI_SIGNATURE && packet_token == win->token) {
if(packet_len >= WEBUI_PROTOCOL_SIZE && (unsigned char)packet[WEBUI_PROTOCOL_SIGN] == WEBUI_SIGNATURE && packet_token == win->token) {
// Mutex
// wait for previous event to finish
@ -6232,7 +6235,7 @@ static WEBUI_THREAD_RECEIVE
// Function Call
// 0: [Header]
// 1: [Fn, Null, {Len;Len;...}, Null, {Data,Null,Data,Null...}, Null]
// 1: [Fn, Null, {Len;Len;...}, Null, {Data,Null,Data,Null...}]
// Get html element id
char* element = (char*)&packet[WEBUI_PROTOCOL_DATA];
@ -6255,13 +6258,16 @@ static WEBUI_THREAD_RECEIVE
win->events[event_num] = event_inf;
// Loop trough args
size_t data_size_expected = 0;
char* args_lens = (char*)&packet[WEBUI_PROTOCOL_DATA + element_len + 1];
char* args_ptr = (char*)&packet[WEBUI_PROTOCOL_DATA + element_len + 1 + _webui_strlen(args_lens) + 1];
size_t args_len = _webui_strlen(args_lens);
char* args_ptr = (char*)&packet[WEBUI_PROTOCOL_DATA + element_len + 1 + args_len + 1];
char* token = strtok(args_lens, ";");
size_t token_num = 0;
while (token != NULL) {
size_t arg_len = (size_t)strtoul(token, NULL, 10);
data_size_expected = data_size_expected + arg_len + 1;
if(arg_len > 0) {
@ -6279,6 +6285,20 @@ static WEBUI_THREAD_RECEIVE
token = strtok(NULL, ";");
}
// Check data validity
size_t data_size_recv = packet_len - (
WEBUI_PROTOCOL_SIZE + // [Header]
element_len + // [Fn]
1 + // [Null]
args_len + // [{Len;Len;...}]
1); // [Null]
if(data_size_expected == data_size_recv) {
#ifdef WEBUI_LOG
printf("[Core]\t\t[Thread %zu] _webui_receive_thread() -> Expected and received %zu bytes of data.\n", recvNum, data_size_expected);
#endif
// Create new event
webui_event_t e;
e.window = win->window_number;
@ -6315,8 +6335,28 @@ static WEBUI_THREAD_RECEIVE
_webui_send(win, win->token, packet_id, WEBUI_CMD_CALL_FUNC, event_inf->response, _webui_strlen(event_inf->response));
// Free event
_webui_free_mem((void*)webui_internal_id);
_webui_free_mem((void*)event_inf->response);
}
else {
// WebSocket/Civetweb did not send all the data as expected.
#ifdef WEBUI_LOG
printf("[Core]\t\t[Thread %zu] _webui_receive_thread() -> No enough data received. Expected %zu bytes, received %zu bytes.\n", recvNum, data_size_expected, data_size_recv);
#endif
// Send a void response to solve `.call()` promise
// Packet Protocol Format:
// [...]
// [CMD]
// [CallResponse]
// Send the packet
_webui_send(win, win->token, packet_id, WEBUI_CMD_CALL_FUNC, NULL, 0);
}
// Free event
_webui_free_mem((void*)webui_internal_id);
_webui_free_mem((void*)event_inf);
}
#ifdef WEBUI_LOG