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mcp: use sentinel-terminated strings for tool params

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This commit is contained in:
Adrià Arrufat
2026-03-01 20:58:00 +09:00
parent fcad67a854
commit 01798ed7f8
1 changed files with 16 additions and 17 deletions
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33
src/mcp/tools.zig
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@@ -21,19 +21,19 @@ pub fn handleList(server: *Server, arena: std.mem.Allocator, req: protocol.Reque
}
const GotoParams = struct {
url: []const u8,
url: [:0]const u8,
};
const SearchParams = struct {
text: []const u8,
text: [:0]const u8,
};
const EvaluateParams = struct {
script: []const u8,
script: [:0]const u8,
};
const OverParams = struct {
result: []const u8,
result: [:0]const u8,
};
const ToolStreamingText = struct {
@@ -101,7 +101,7 @@ pub fn handleCall(server: *Server, arena: std.mem.Allocator, req: protocol.Reque
return sendError(server, req.id.?, -32602, "Invalid arguments for goto");
};
performGoto(server, arena, args.url) catch {
performGoto(server, args.url) catch {
return sendError(server, req.id.?, -32603, "Internal error during navigation");
};
@@ -120,11 +120,11 @@ pub fn handleCall(server: *Server, arena: std.mem.Allocator, req: protocol.Reque
component.formatQuery(&url_aw.writer) catch {
return sendError(server, req.id.?, -32603, "Internal error formatting query");
};
const url = std.fmt.allocPrint(arena, "https://duckduckgo.com/?q={s}", .{url_aw.written()}) catch {
const url = std.fmt.allocPrintSentinel(arena, "https://duckduckgo.com/?q={s}", .{url_aw.written()}, 0) catch {
return sendError(server, req.id.?, -32603, "Internal error formatting URL");
};
performGoto(server, arena, url) catch {
performGoto(server, url) catch {
return sendError(server, req.id.?, -32603, "Internal error during search navigation");
};
@@ -132,12 +132,12 @@ pub fn handleCall(server: *Server, arena: std.mem.Allocator, req: protocol.Reque
try sendResult(server, req.id.?, .{ .content = &content });
} else if (std.mem.eql(u8, call_params.name, "markdown")) {
const MarkdownParams = struct {
url: ?[]const u8 = null,
url: ?[:0]const u8 = null,
};
if (call_params.arguments) |args_raw| {
if (std.json.parseFromValueLeaky(MarkdownParams, arena, args_raw, .{ .ignore_unknown_fields = true })) |args| {
if (args.url) |u| {
performGoto(server, arena, u) catch {
performGoto(server, u) catch {
return sendError(server, req.id.?, -32603, "Internal error during navigation");
};
}
@@ -155,12 +155,12 @@ pub fn handleCall(server: *Server, arena: std.mem.Allocator, req: protocol.Reque
try sendResult(server, req.id.?, result);
} else if (std.mem.eql(u8, call_params.name, "links")) {
const LinksParams = struct {
url: ?[]const u8 = null,
url: ?[:0]const u8 = null,
};
if (call_params.arguments) |args_raw| {
if (std.json.parseFromValueLeaky(LinksParams, arena, args_raw, .{ .ignore_unknown_fields = true })) |args| {
if (args.url) |u| {
performGoto(server, arena, u) catch {
performGoto(server, u) catch {
return sendError(server, req.id.?, -32603, "Internal error during navigation");
};
}
@@ -182,8 +182,8 @@ pub fn handleCall(server: *Server, arena: std.mem.Allocator, req: protocol.Reque
}
const EvaluateParamsEx = struct {
script: []const u8,
url: ?[]const u8 = null,
script: [:0]const u8,
url: ?[:0]const u8 = null,
};
const args = std.json.parseFromValueLeaky(EvaluateParamsEx, arena, call_params.arguments.?, .{ .ignore_unknown_fields = true }) catch {
@@ -191,7 +191,7 @@ pub fn handleCall(server: *Server, arena: std.mem.Allocator, req: protocol.Reque
};
if (args.url) |url| {
performGoto(server, arena, url) catch {
performGoto(server, url) catch {
return sendError(server, req.id.?, -32603, "Internal error during navigation");
};
}
@@ -224,9 +224,8 @@ pub fn handleCall(server: *Server, arena: std.mem.Allocator, req: protocol.Reque
}
}
fn performGoto(server: *Server, arena: std.mem.Allocator, url: []const u8) !void {
const url_z = try arena.dupeZ(u8, url);
_ = server.page.navigate(url_z, .{
fn performGoto(server: *Server, url: [:0]const u8) !void {
_ = server.page.navigate(url, .{
.reason = .address_bar,
.kind = .{ .push = null },
}) catch {