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mcp: improve robustness of server and test harness

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- Refactor router and test harness for non-blocking I/O using buffered polling.
- Implement reliable test failure reporting from sub-threads to the main test runner.
- Encapsulate pipe management using idiomatic std.fs.File methods.
- Fix invalid JSON generation in resource streaming due to duplicate fields.
- Improve shutdown sequence for clean test exits.
This commit is contained in:
Adrià Arrufat
2026-03-02 16:50:47 +09:00
parent 64107f5957
commit a7872aa054
4 changed files with 203 additions and 174 deletions
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14
src/mcp/resources.zig
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@@ -44,17 +44,9 @@ const ResourceStreamingResult = struct {
const StreamingText = struct {
server: *Server,
uri: []const u8,
format: enum { html, markdown },
pub fn jsonStringify(self: @This(), jw: *std.json.Stringify) !void {
try jw.beginObject();
try jw.objectField("uri");
try jw.write(self.uri);
try jw.objectField("mimeType");
try jw.write(if (self.format == .html) "text/html" else "text/markdown");
try jw.objectField("text");
try jw.beginWriteRaw();
try jw.writer.writeByte('"');
var escaped = protocol.JsonEscapingWriter.init(jw.writer);
@@ -68,8 +60,6 @@ const ResourceStreamingResult = struct {
}
try jw.writer.writeByte('"');
jw.endWriteRaw();
try jw.endObject();
}
};
};
@@ -88,7 +78,7 @@ pub fn handleRead(server: *Server, arena: std.mem.Allocator, req: protocol.Reque
.contents = &.{.{
.uri = params.uri,
.mimeType = "text/html",
.text = .{ .server = server, .uri = params.uri, .format = .html },
.text = .{ .server = server, .format = .html },
}},
};
try server.sendResult(req.id.?, result);
@@ -97,7 +87,7 @@ pub fn handleRead(server: *Server, arena: std.mem.Allocator, req: protocol.Reque
.contents = &.{.{
.uri = params.uri,
.mimeType = "text/markdown",
.text = .{ .server = server, .uri = params.uri, .format = .markdown },
.text = .{ .server = server, .format = .markdown },
}},
};
try server.sendResult(req.id.?, result);