server: newSession on disposeBrowserContext

Signed-off-by: Francis Bouvier <francis@lightpanda.io>

src/browser/browser.zig

@@ -64,6 +64,11 @@ pub const Browser = struct {
         self.session.deinit();
     }
 
+    pub fn newSession(self: *Browser, alloc: std.mem.Allocator, loop: *jsruntime.Loop) !void {
+        self.session.deinit();
+        self.session = try Session.init(alloc, loop, "about:blank");
+    }
+
     pub fn currentSession(self: *Browser) *Session {
         return self.session;
     }

src/cdp/target.zig

@@ -226,7 +226,7 @@ fn disposeBrowserContext(
     alloc: std.mem.Allocator,
     id: ?u16,
     scanner: *std.json.Scanner,
-    _: *Ctx,
+    ctx: *Ctx,
 ) ![]const u8 {
 
     // input
@@ -236,7 +236,11 @@ fn disposeBrowserContext(
     const msg = try getMsg(alloc, Params, scanner);
 
     // output
-    return result(alloc, id orelse msg.id.?, null, {}, null);
+    const res = try result(alloc, id orelse msg.id.?, null, .{}, null);
+    defer alloc.free(res);
+    try server.sendSync(ctx, res);
+
+    return error.DisposeBrowserContext;
 }
 
 // TODO: hard coded IDs

src/server.zig

@@ -82,7 +82,10 @@ pub const Cmd = struct {
         }
 
         // read and execute input
-        self.msg_buf.read(self.alloc(), input, self, Cmd.do) catch unreachable;
+        self.msg_buf.read(self.alloc(), input, self, Cmd.do) catch |err| {
+            std.log.err("do error: {any}", .{err});
+            return;
+        };
 
         // continue receving incomming messages asynchronously
         self.loop.io.recv(*Cmd, self, cbk, completion, self.socket, self.buf);
@@ -99,7 +102,13 @@ pub const Cmd = struct {
     }
 
     fn do(self: *Cmd, cmd: []const u8) anyerror!void {
-        const res = try cdp.do(self.alloc(), cmd, self);
+        const res = cdp.do(self.alloc(), cmd, self) catch |err| {
+            if (err == error.DisposeBrowserContext) {
+                try self.newSession();
+                return;
+            }
+            return err;
+        };
 
         // send result
         if (!std.mem.eql(u8, res, "")) {
@@ -108,6 +117,13 @@ pub const Cmd = struct {
         }
     }
 
+    fn newSession(self: *Cmd) !void {
+        std.log.info("new session", .{});
+        try self.browser.newSession(self.alloc(), self.loop);
+        const cmd_opaque = @as(*anyopaque, @ptrCast(self));
+        try self.browser.currentSession().setInspector(cmd_opaque, Cmd.onInspectorResp, Cmd.onInspectorNotif);
+    }
+
     // Inspector
 
     pub fn sendInspector(self: *Cmd, msg: []const u8) void {