1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
// Copyright 2025 Oxibase Contributors
//
// 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.
// See the License for the specific language governing permissions and
// limitations under the License.
use crate::server::AppState;
use axum::{
extract::{
ws::{Message, WebSocket, WebSocketUpgrade},
State,
},
http::header,
response::IntoResponse,
};
use tokio::sync::mpsc;
/// Serves the vanilla JavaScript DAP client
pub async fn serve_dap_client() -> impl IntoResponse {
let js = include_str!("../bin/workspace/static/js/dap-client.js");
([(header::CONTENT_TYPE, "application/javascript")], js)
}
/// Upgrades the connection to a WebSocket for DAP communication
pub async fn dap_ws_handler(
ws: WebSocketUpgrade,
State(state): State<AppState>,
) -> impl IntoResponse {
ws.on_upgrade(move |socket| handle_socket(socket, state))
}
async fn handle_socket(mut socket: WebSocket, state: AppState) {
let mut buffer = String::new();
// Set up a channel for the DebugController to send events back to the client
let (tx, mut rx) = mpsc::unbounded_channel::<serde_json::Value>();
{
let mut client_tx = state.debug_controller.client_tx.lock().unwrap();
*client_tx = Some(tx);
}
loop {
tokio::select! {
Some(msg) = socket.recv() => {
if let Ok(msg) = msg {
match msg {
Message::Text(text) => {
buffer.push_str(&text);
process_dap_buffer(&mut buffer, &mut socket, &state).await;
}
Message::Close(_) => break,
_ => {}
}
} else {
break;
}
}
Some(event) = rx.recv() => {
if let Ok(json_str) = serde_json::to_string(&event) {
if send_dap_message(&mut socket, &json_str).await.is_err() {
break;
}
}
}
}
}
// Cleanup
{
let mut client_tx = state.debug_controller.client_tx.lock().unwrap();
*client_tx = None;
}
}
async fn process_dap_buffer(buffer: &mut String, socket: &mut WebSocket, state: &AppState) {
loop {
// Look for the end of the headers
if let Some(header_end) = buffer.find("\r\n\r\n") {
let headers = &buffer[..header_end];
// Extract Content-Length
let mut content_length: Option<usize> = None;
for line in headers.split("\r\n") {
if line.to_lowercase().starts_with("content-length:") {
let parts: Vec<&str> = line.split(':').collect();
if parts.len() == 2 {
if let Ok(len) = parts[1].trim().parse::<usize>() {
content_length = Some(len);
}
}
}
}
if let Some(len) = content_length {
let body_start = header_end + 4;
if buffer.len() >= body_start + len {
// We have the full message
let payload = &buffer[body_start..body_start + len];
// Parse the JSON payload
if let Ok(json) = serde_json::from_str::<serde_json::Value>(payload) {
println!("Received DAP JSON: {}", json);
// Pass JSON to internal DebugController here
if let Some(type_val) = json.get("type").and_then(|v| v.as_str()) {
if type_val == "request" {
if let Some(cmd) = json.get("command").and_then(|v| v.as_str()) {
let seq = json.get("seq").and_then(|v| v.as_i64()).unwrap_or(1);
if cmd == "initialize" {
let resp = serde_json::json!({
"seq": 1,
"type": "response",
"request_seq": seq,
"command": "initialize",
"success": true,
"body": {
"supportsConfigurationDoneRequest": true,
"supportsFunctionBreakpoints": true,
}
});
if let Ok(resp_str) = serde_json::to_string(&resp) {
let _ = send_dap_message(socket, &resp_str).await;
}
let event = serde_json::json!({
"seq": 2,
"type": "event",
"event": "initialized"
});
if let Ok(event_str) = serde_json::to_string(&event) {
let _ = send_dap_message(socket, &event_str).await;
}
} else if cmd == "setBreakpoints" {
// Update DebugController breakpoints
if let Some(args) = json.get("arguments") {
if let Some(source) = args.get("source") {
if let Some(path) =
source.get("path").and_then(|v| v.as_str())
{
let mut lines = Vec::new();
if let Some(bps) = args
.get("breakpoints")
.and_then(|v| v.as_array())
{
for bp in bps {
if let Some(line) = bp
.get("line")
.and_then(|v| v.as_u64())
{
lines.push(line as usize);
}
}
}
println!(
"DAP setBreakpoints for {} at lines {:?}",
path, lines
);
state
.debug_controller
.set_breakpoints(path, lines);
}
}
}
// Reply
let resp = serde_json::json!({
"seq": 1,
"type": "response",
"request_seq": seq,
"command": "setBreakpoints",
"success": true,
"body": {
"breakpoints": []
}
});
if let Ok(resp_str) = serde_json::to_string(&resp) {
let _ = send_dap_message(socket, &resp_str).await;
}
} else if cmd == "continue" {
state
.debug_controller
.resume(crate::common::debug::ResumeAction::Continue);
let resp = serde_json::json!({
"seq": 1,
"type": "response",
"request_seq": seq,
"command": "continue",
"success": true
});
if let Ok(resp_str) = serde_json::to_string(&resp) {
let _ = send_dap_message(socket, &resp_str).await;
}
// Emit continued event
let event = serde_json::json!({
"seq": 2,
"type": "event",
"event": "continued",
"body": {
"threadId": 1,
"allThreadsContinued": true
}
});
if let Ok(event_str) = serde_json::to_string(&event) {
let _ = send_dap_message(socket, &event_str).await;
}
} else if cmd == "next" {
state
.debug_controller
.resume(crate::common::debug::ResumeAction::StepOver);
let resp = serde_json::json!({
"seq": 1,
"type": "response",
"request_seq": seq,
"command": "next",
"success": true
});
if let Ok(resp_str) = serde_json::to_string(&resp) {
let _ = send_dap_message(socket, &resp_str).await;
}
} else if cmd == "disconnect" {
state
.debug_controller
.resume(crate::common::debug::ResumeAction::Disconnect);
let resp = serde_json::json!({
"seq": 1,
"type": "response",
"request_seq": seq,
"command": "disconnect",
"success": true
});
if let Ok(resp_str) = serde_json::to_string(&resp) {
let _ = send_dap_message(socket, &resp_str).await;
}
} else if cmd == "threads" {
let resp = serde_json::json!({
"seq": 1,
"type": "response",
"request_seq": seq,
"command": "threads",
"success": true,
"body": {
"threads": [{"id": 1, "name": "Main Thread"}]
}
});
if let Ok(resp_str) = serde_json::to_string(&resp) {
let _ = send_dap_message(socket, &resp_str).await;
}
} else if cmd == "stackTrace" {
let resp = serde_json::json!({
"seq": 1,
"type": "response",
"request_seq": seq,
"command": "stackTrace",
"success": true,
"body": {
"stackFrames": [
{"id": 1, "name": "Execution Context", "line": 0, "column": 0}
]
}
});
if let Ok(resp_str) = serde_json::to_string(&resp) {
let _ = send_dap_message(socket, &resp_str).await;
}
} else if cmd == "scopes" {
let resp = serde_json::json!({
"seq": 1,
"type": "response",
"request_seq": seq,
"command": "scopes",
"success": true,
"body": {
"scopes": [
{"name": "Locals", "variablesReference": 1, "expensive": false},
{"name": "Globals", "variablesReference": 2, "expensive": false}
]
}
});
if let Ok(resp_str) = serde_json::to_string(&resp) {
let _ = send_dap_message(socket, &resp_str).await;
}
} else if cmd == "variables" {
let vars_ref = json
.get("arguments")
.and_then(|a| a.get("variablesReference"))
.and_then(|v| v.as_i64())
.unwrap_or(0);
let mut vars = Vec::new();
{
let pause_state =
state.debug_controller.pause_mutex.lock().unwrap();
if vars_ref == 1 {
if let Some(locals) = &pause_state.current_locals {
if let Some(obj) = locals.as_object() {
for (k, v) in obj {
vars.push(serde_json::json!({
"name": k,
"value": v.to_string(),
"type": "object",
"variablesReference": 0
}));
}
}
}
} else if vars_ref == 2 {
if let Some(globals) = &pause_state.current_globals
{
if let Some(obj) = globals.as_object() {
for (k, v) in obj {
vars.push(serde_json::json!({
"name": k,
"value": v.to_string(),
"type": "object",
"variablesReference": 0
}));
}
}
}
}
}
let resp = serde_json::json!({
"seq": 1,
"type": "response",
"request_seq": seq,
"command": "variables",
"success": true,
"body": {
"variables": vars
}
});
if let Ok(resp_str) = serde_json::to_string(&resp) {
let _ = send_dap_message(socket, &resp_str).await;
}
}
}
}
}
} else {
eprintln!("Failed to parse DAP JSON: {}", payload);
}
// Remove processed message from buffer
*buffer = buffer[body_start + len..].to_string();
continue; // Check if there's another message in the buffer
}
}
}
break; // Need more data
}
}
async fn send_dap_message(socket: &mut WebSocket, json_str: &str) -> Result<(), axum::Error> {
let payload = format!("Content-Length: {}\r\n\r\n{}", json_str.len(), json_str);
socket.send(Message::Text(payload.into())).await
}