Keep Streamable HTTP tests in rmcp_client suite

Co-authored-by: Codex <noreply@openai.com>
This commit is contained in:
Ahmed Ibrahim
2026-04-22 17:51:02 -07:00
co-authored by Codex
parent a92dc1f1b5
commit 6da1978ff4
2 changed files with 802 additions and 846 deletions
+802 -3
View File
@@ -6,6 +6,8 @@ use std::collections::HashMap;
use std::ffi::OsStr;
use std::ffi::OsString;
use std::fs;
use std::net::SocketAddr;
use std::net::TcpListener;
use std::path::Path;
use std::path::PathBuf;
use std::process::Command as StdCommand;
@@ -40,6 +42,7 @@ use codex_protocol::protocol::McpToolCallBeginEvent;
use codex_protocol::protocol::Op;
use codex_protocol::protocol::SandboxPolicy;
use codex_protocol::user_input::UserInput;
use codex_utils_cargo_bin::cargo_bin;
use core_test_support::assert_regex_match;
use core_test_support::remote_env_env_var;
use core_test_support::responses;
@@ -52,9 +55,14 @@ use core_test_support::test_codex::TestCodex;
use core_test_support::test_codex::test_codex;
use core_test_support::wait_for_event;
use core_test_support::wait_for_event_with_timeout;
use reqwest::Client;
use reqwest::StatusCode;
use serde_json::Value;
use serde_json::json;
use serial_test::serial;
use tempfile::tempdir;
use tokio::process::Child;
use tokio::process::Command;
use tokio::time::Instant;
use tokio::time::sleep;
use wiremock::MockServer;
@@ -200,9 +208,6 @@ fn copy_binary_to_remote_env(
Ok(remote_path)
}
#[path = "rmcp_client/streamable_http_tests.rs"]
mod streamable_http_tests;
async fn wait_for_mcp_tool(fixture: &TestCodex, tool_name: &str) -> anyhow::Result<()> {
let tools_ready_deadline = Instant::now() + Duration::from_secs(30);
loop {
@@ -1846,6 +1851,800 @@ async fn remote_stdio_env_var_source_does_not_copy_local_env() -> anyhow::Result
Ok(())
}
/// Remote runtime websocket URL used by remote-aware MCP integration tests.
const REMOTE_EXEC_SERVER_URL_ENV_VAR: &str = "CODEX_TEST_REMOTE_EXEC_SERVER_URL";
/// OAuth metadata path served by the Streamable HTTP MCP test server.
const STREAMABLE_HTTP_METADATA_PATH: &str = "/.well-known/oauth-authorization-server/mcp";
/// Streamable HTTP test server plus the process handle needed for cleanup.
struct StreamableHttpTestServer {
server_url: String,
process: StreamableHttpTestServerProcess,
}
/// Tracks whether the Streamable HTTP test server runs on the host or remotely.
enum StreamableHttpTestServerProcess {
Local(Child),
Remote(RemoteStreamableHttpServer),
}
/// Remote Streamable HTTP server process and copied files to remove on drop.
struct RemoteStreamableHttpServer {
container_name: String,
pid: String,
paths_to_remove: Vec<String>,
}
impl Drop for RemoteStreamableHttpServer {
/// Stops the remote process and removes copied test artifacts best-effort.
fn drop(&mut self) {
self.kill();
if self.paths_to_remove.is_empty() {
return;
}
let script = format!("rm -f {}", self.paths_to_remove.join(" "));
let _ = StdCommand::new("docker")
.args(["exec", &self.container_name, "sh", "-lc", &script])
.output();
}
}
impl RemoteStreamableHttpServer {
/// Stops the remote Streamable HTTP test server process.
fn kill(&self) {
let _ = StdCommand::new("docker")
.args(["exec", &self.container_name, "kill", &self.pid])
.output();
}
}
impl StreamableHttpTestServer {
/// Returns the MCP endpoint URL that Codex should connect to.
fn url(&self) -> &str {
&self.server_url
}
/// Stops the local or remote test server and waits for local process exit.
async fn shutdown(mut self) {
match &mut self.process {
StreamableHttpTestServerProcess::Local(child) => match child.try_wait() {
Ok(Some(_)) => {}
Ok(None) => {
let _ = child.kill().await;
}
Err(error) => {
eprintln!("failed to check streamable http server status: {error}");
let _ = child.kill().await;
}
},
StreamableHttpTestServerProcess::Remote(server) => {
server.kill();
}
}
if let StreamableHttpTestServerProcess::Local(child) = &mut self.process
&& let Err(error) = child.wait().await
{
eprintln!("failed to await streamable http server shutdown: {error}");
}
}
}
/// What this tests: Codex can discover and call a Streamable HTTP MCP tool in
/// both local and remote-aware placements, and the tool observes the expected
/// environment value from the server process that actually handled the request.
#[tokio::test(flavor = "multi_thread", worker_threads = 1)]
async fn streamable_http_tool_call_round_trip() -> anyhow::Result<()> {
skip_if_no_network!(Ok(()));
// Phase 1: script the model responses so Codex will call the MCP echo tool
// and then complete the turn after the tool result is returned.
let server = responses::start_mock_server().await;
let call_id = "call-456";
let server_name = "rmcp_http";
let namespace = format!("mcp__{server_name}__");
mount_sse_once(
&server,
responses::sse(vec![
responses::ev_response_created("resp-1"),
responses::ev_function_call_with_namespace(
call_id,
&namespace,
"echo",
"{\"message\":\"ping\"}",
),
responses::ev_completed("resp-1"),
]),
)
.await;
mount_sse_once(
&server,
responses::sse(vec![
responses::ev_assistant_message(
"msg-1",
"rmcp streamable http echo tool completed successfully.",
),
responses::ev_completed("resp-2"),
]),
)
.await;
// Phase 2: start the Streamable HTTP MCP test server in the active
// placement. In full CI this may be the remote executor container; locally
// it is a host process.
let expected_env_value = "propagated-env-http";
let Some(http_server) =
start_streamable_http_test_server(expected_env_value, /*expected_token*/ None).await?
else {
return Ok(());
};
let server_url = http_server.url().to_string();
// Phase 3: configure Codex with the Streamable HTTP MCP server and build a
// fixture that selects remote MCP placement only when the remote test
// environment is active.
let fixture = test_codex()
.with_config(move |config| {
insert_mcp_server(
config,
server_name,
McpServerTransportConfig::StreamableHttp {
url: server_url,
bearer_token_env_var: None,
http_headers: None,
env_http_headers: None,
},
TestMcpServerOptions {
experimental_environment: remote_aware_experimental_environment(),
..Default::default()
},
);
})
.build_remote_aware(&server)
.await?;
let session_model = fixture.session_configured.model.clone();
// Phase 4: submit the user turn that should trigger the MCP tool call.
fixture
.codex
.submit(Op::UserTurn {
items: vec![UserInput::Text {
text: "call the rmcp streamable http echo tool".into(),
text_elements: Vec::new(),
}],
final_output_json_schema: None,
cwd: fixture.cwd.path().to_path_buf(),
approval_policy: AskForApproval::Never,
approvals_reviewer: None,
sandbox_policy: SandboxPolicy::new_read_only_policy(),
model: session_model,
effort: None,
summary: None,
service_tier: None,
collaboration_mode: None,
personality: None,
environments: None,
})
.await?;
// Phase 5: assert Codex begins the expected tool invocation.
let begin_event = wait_for_event(&fixture.codex, |ev| {
matches!(ev, EventMsg::McpToolCallBegin(_))
})
.await;
let EventMsg::McpToolCallBegin(begin) = begin_event else {
unreachable!("event guard guarantees McpToolCallBegin");
};
assert_eq!(begin.invocation.server, server_name);
assert_eq!(begin.invocation.tool, "echo");
// Phase 6: assert the tool result proves the server handled the request and
// propagated the expected environment value.
let end_event = wait_for_event(&fixture.codex, |ev| {
matches!(ev, EventMsg::McpToolCallEnd(_))
})
.await;
let EventMsg::McpToolCallEnd(end) = end_event else {
unreachable!("event guard guarantees McpToolCallEnd");
};
let result = end
.result
.as_ref()
.expect("rmcp echo tool should return success");
assert_eq!(result.is_error, Some(false));
assert!(
result.content.is_empty(),
"content should default to an empty array"
);
let structured = result
.structured_content
.as_ref()
.expect("structured content");
let Value::Object(map) = structured else {
panic!("structured content should be an object: {structured:?}");
};
let echo_value = map
.get("echo")
.and_then(Value::as_str)
.expect("echo payload present");
assert_eq!(echo_value, "ECHOING: ping");
let env_value = map
.get("env")
.and_then(Value::as_str)
.expect("env snapshot inserted");
assert_eq!(env_value, expected_env_value);
// Phase 7: verify the scripted model calls were consumed and clean up the
// placement-aware MCP server.
wait_for_event(&fixture.codex, |ev| matches!(ev, EventMsg::TurnComplete(_))).await;
server.verify().await;
http_server.shutdown().await;
Ok(())
}
/// This test writes to a fallback credentials file in CODEX_HOME.
/// Ideally, we wouldn't need to serialize the test but it's much more cumbersome to wire CODEX_HOME through the code.
#[test]
#[serial(codex_home)]
fn streamable_http_with_oauth_round_trip() -> anyhow::Result<()> {
const TEST_STACK_SIZE_BYTES: usize = 8 * 1024 * 1024;
let handle = std::thread::Builder::new()
.name("streamable_http_with_oauth_round_trip".to_string())
.stack_size(TEST_STACK_SIZE_BYTES)
.spawn(|| -> anyhow::Result<()> {
let runtime = tokio::runtime::Builder::new_multi_thread()
.worker_threads(1)
.enable_all()
.build()?;
runtime.block_on(streamable_http_with_oauth_round_trip_impl())
})?;
match handle.join() {
Ok(result) => result,
Err(_) => Err(anyhow::anyhow!(
"streamable_http_with_oauth_round_trip thread panicked"
)),
}
}
#[allow(clippy::expect_used)]
async fn streamable_http_with_oauth_round_trip_impl() -> anyhow::Result<()> {
skip_if_no_network!(Ok(()));
// Phase 1: script the model responses so Codex will call the OAuth-backed
// MCP echo tool and then finish the turn after receiving the result.
let server = responses::start_mock_server().await;
let call_id = "call-789";
let server_name = "rmcp_http_oauth";
let tool_name = format!("mcp__{server_name}__echo");
let namespace = format!("mcp__{server_name}__");
mount_sse_once(
&server,
responses::sse(vec![
responses::ev_response_created("resp-1"),
responses::ev_function_call_with_namespace(
call_id,
&namespace,
"echo",
"{\"message\":\"ping\"}",
),
responses::ev_completed("resp-1"),
]),
)
.await;
mount_sse_once(
&server,
responses::sse(vec![
responses::ev_assistant_message(
"msg-1",
"rmcp streamable http oauth echo tool completed successfully.",
),
responses::ev_completed("resp-2"),
]),
)
.await;
// Phase 2: start the Streamable HTTP MCP test server with bearer-token
// enforcement enabled so the client must use stored OAuth credentials.
let expected_env_value = "propagated-env-http-oauth";
let expected_token = "initial-access-token";
let client_id = "test-client-id";
let refresh_token = "initial-refresh-token";
let Some(http_server) =
start_streamable_http_test_server(expected_env_value, Some(expected_token)).await?
else {
return Ok(());
};
let server_url = http_server.url().to_string();
// Phase 3: seed an isolated CODEX_HOME with fallback OAuth tokens for this
// server so the test does not share credentials with other suite cases.
let temp_home = Arc::new(tempdir()?);
let _codex_home_guard = EnvVarGuard::set("CODEX_HOME", temp_home.path().as_os_str());
write_fallback_oauth_tokens(
temp_home.path(),
server_name,
&server_url,
client_id,
expected_token,
refresh_token,
)?;
// Phase 4: configure Codex with the OAuth-backed Streamable HTTP MCP
// server and build the fixture in the active local or remote-aware mode.
let fixture = test_codex()
.with_home(temp_home.clone())
.with_config(move |config| {
// Keep OAuth credentials isolated to this test home because Bazel
// runs the full core suite in one process.
config.mcp_oauth_credentials_store_mode = serde_json::from_value(json!("file"))
.expect("`file` should deserialize as OAuthCredentialsStoreMode");
insert_mcp_server(
config,
server_name,
McpServerTransportConfig::StreamableHttp {
url: server_url,
bearer_token_env_var: None,
http_headers: None,
env_http_headers: None,
},
TestMcpServerOptions {
experimental_environment: remote_aware_experimental_environment(),
..Default::default()
},
);
})
.build_remote_aware(&server)
.await?;
let session_model = fixture.session_configured.model.clone();
// Phase 5: wait for MCP discovery to publish the expected tool before the
// turn is submitted, which keeps failures tied to server startup/discovery.
wait_for_mcp_tool(&fixture, &tool_name).await?;
// Phase 6: submit the user turn that should invoke the OAuth-backed tool.
fixture
.codex
.submit(Op::UserTurn {
items: vec![UserInput::Text {
text: "call the rmcp streamable http oauth echo tool".into(),
text_elements: Vec::new(),
}],
final_output_json_schema: None,
cwd: fixture.cwd.path().to_path_buf(),
approval_policy: AskForApproval::Never,
approvals_reviewer: None,
sandbox_policy: SandboxPolicy::new_read_only_policy(),
model: session_model,
effort: None,
summary: None,
service_tier: None,
collaboration_mode: None,
personality: None,
environments: None,
})
.await?;
// Phase 7: assert Codex begins the expected tool invocation.
let begin_event = wait_for_event(&fixture.codex, |ev| {
matches!(ev, EventMsg::McpToolCallBegin(_))
})
.await;
let EventMsg::McpToolCallBegin(begin) = begin_event else {
unreachable!("event guard guarantees McpToolCallBegin");
};
assert_eq!(begin.invocation.server, server_name);
assert_eq!(begin.invocation.tool, "echo");
// Phase 8: assert the tool result proves the authenticated request reached
// the server and preserved the expected environment value.
let end_event = wait_for_event(&fixture.codex, |ev| {
matches!(ev, EventMsg::McpToolCallEnd(_))
})
.await;
let EventMsg::McpToolCallEnd(end) = end_event else {
unreachable!("event guard guarantees McpToolCallEnd");
};
let result = end
.result
.as_ref()
.expect("rmcp echo tool should return success");
assert_eq!(result.is_error, Some(false));
assert!(
result.content.is_empty(),
"content should default to an empty array"
);
let structured = result
.structured_content
.as_ref()
.expect("structured content");
let Value::Object(map) = structured else {
panic!("structured content should be an object: {structured:?}");
};
let echo_value = map
.get("echo")
.and_then(Value::as_str)
.expect("echo payload present");
assert_eq!(echo_value, "ECHOING: ping");
let env_value = map
.get("env")
.and_then(Value::as_str)
.expect("env snapshot inserted");
assert_eq!(env_value, expected_env_value);
// Phase 9: verify the scripted model calls were consumed and clean up the
// placement-aware MCP server.
wait_for_event(&fixture.codex, |ev| matches!(ev, EventMsg::TurnComplete(_))).await;
server.verify().await;
http_server.shutdown().await;
Ok(())
}
/// Starts the Streamable HTTP MCP test server in the active test placement.
async fn start_streamable_http_test_server(
expected_env_value: &str,
expected_token: Option<&str>,
) -> anyhow::Result<Option<StreamableHttpTestServer>> {
let rmcp_http_server_bin = match cargo_bin("test_streamable_http_server") {
Ok(path) => path,
Err(err) => {
eprintln!("test_streamable_http_server binary not available, skipping test: {err}");
return Ok(None);
}
};
if let Some(container_name) = remote_env_container_name()? {
return Ok(Some(
start_remote_streamable_http_test_server(
&container_name,
&rmcp_http_server_bin,
expected_env_value,
expected_token,
)
.await?,
));
}
let listener = TcpListener::bind("127.0.0.1:0")?;
let port = listener.local_addr()?.port();
drop(listener);
let bind_addr = format!("127.0.0.1:{port}");
let server_url = format!("http://{bind_addr}/mcp");
let mut command = Command::new(&rmcp_http_server_bin);
command
.kill_on_drop(true)
.env("MCP_STREAMABLE_HTTP_BIND_ADDR", &bind_addr)
.env("MCP_TEST_VALUE", expected_env_value);
if let Some(expected_token) = expected_token {
command.env("MCP_EXPECT_BEARER", expected_token);
}
let mut child = command.spawn()?;
wait_for_local_streamable_http_server(&mut child, &server_url, Duration::from_secs(5)).await?;
Ok(Some(StreamableHttpTestServer {
server_url,
process: StreamableHttpTestServerProcess::Local(child),
}))
}
/// Starts the Streamable HTTP MCP test server inside the remote test container.
async fn start_remote_streamable_http_test_server(
container_name: &str,
rmcp_http_server_bin: &Path,
expected_env_value: &str,
expected_token: Option<&str>,
) -> anyhow::Result<StreamableHttpTestServer> {
let remote_path = copy_binary_to_remote_env(
container_name,
rmcp_http_server_bin,
"test_streamable_http_server",
)?;
let bound_addr_file = format!("{remote_path}.addr");
let log_file = format!("{remote_path}.log");
let mut env_assignments = vec![
format!(
"MCP_STREAMABLE_HTTP_BIND_ADDR={}",
sh_single_quote("0.0.0.0:0")
),
format!(
"MCP_STREAMABLE_HTTP_BOUND_ADDR_FILE={}",
sh_single_quote(&bound_addr_file)
),
format!("MCP_TEST_VALUE={}", sh_single_quote(expected_env_value)),
];
if let Some(expected_token) = expected_token {
env_assignments.push(format!(
"MCP_EXPECT_BEARER={}",
sh_single_quote(expected_token)
));
}
let script = format!(
"{} nohup {} > {} 2>&1 < /dev/null & echo $!",
env_assignments.join(" "),
sh_single_quote(&remote_path),
sh_single_quote(&log_file)
);
let start_output = StdCommand::new("docker")
.args(["exec", container_name, "sh", "-lc", &script])
.output()
.context("start remote streamable HTTP MCP test server")?;
ensure!(
start_output.status.success(),
"docker start streamable HTTP MCP test server failed: stdout={} stderr={}",
String::from_utf8_lossy(&start_output.stdout).trim(),
String::from_utf8_lossy(&start_output.stderr).trim()
);
let pid = String::from_utf8(start_output.stdout)
.context("remote streamable HTTP server pid must be utf-8")?
.trim()
.to_string();
ensure!(
!pid.is_empty(),
"remote streamable HTTP server pid is empty"
);
let remote_bind_addr =
wait_for_remote_bound_addr(container_name, &bound_addr_file, Duration::from_secs(5))
.await?;
let container_ip = remote_container_ip(container_name)?;
let server_url = format!("http://{}:{}/mcp", container_ip, remote_bind_addr.port());
// The orchestrator can see the Docker container IP, but the behavior under
// test is whether the remote-side MCP client can reach it. Probe through
// remote HTTP before handing the URL to the Codex fixture.
wait_for_remote_streamable_http_server(&server_url, Duration::from_secs(5)).await?;
if expected_token.is_some() {
wait_for_streamable_http_metadata(&server_url, Duration::from_secs(5)).await?;
}
Ok(StreamableHttpTestServer {
server_url,
process: StreamableHttpTestServerProcess::Remote(RemoteStreamableHttpServer {
container_name: container_name.to_string(),
pid,
paths_to_remove: vec![remote_path, bound_addr_file, log_file],
}),
})
}
/// Single-quotes a value for the small shell snippets sent through Docker.
fn sh_single_quote(value: &str) -> String {
format!("'{}'", value.replace('\'', "'\\''"))
}
/// Waits until the remote test server writes the socket address it bound to.
async fn wait_for_remote_bound_addr(
container_name: &str,
bound_addr_file: &str,
timeout: Duration,
) -> anyhow::Result<SocketAddr> {
let deadline = Instant::now() + timeout;
loop {
let output = StdCommand::new("docker")
.args(["exec", container_name, "cat", bound_addr_file])
.output()
.context("read remote streamable HTTP server bound address")?;
if output.status.success() {
let bound_addr = String::from_utf8(output.stdout)
.context("remote streamable HTTP bound address must be utf-8")?;
return bound_addr
.trim()
.parse()
.context("parse remote streamable HTTP bound address");
}
if Instant::now() >= deadline {
return Err(anyhow::anyhow!(
"timed out waiting for remote streamable HTTP bound address: {}",
String::from_utf8_lossy(&output.stderr).trim()
));
}
sleep(Duration::from_millis(50)).await;
}
}
/// Reads the container IP that the host-side test process can use.
fn remote_container_ip(container_name: &str) -> anyhow::Result<String> {
let output = StdCommand::new("docker")
.args([
"inspect",
"-f",
"{{range .NetworkSettings.Networks}}{{println .IPAddress}}{{end}}",
container_name,
])
.output()
.context("inspect remote MCP test container IP")?;
ensure!(
output.status.success(),
"docker inspect remote MCP test container IP failed: stdout={} stderr={}",
String::from_utf8_lossy(&output.stdout).trim(),
String::from_utf8_lossy(&output.stderr).trim()
);
let inspect_output =
String::from_utf8(output.stdout).context("remote MCP test container IP must be utf-8")?;
let ip = inspect_output
.lines()
.map(str::trim)
.find(|line| !line.is_empty())
.unwrap_or_default()
.to_string();
if ip.is_empty() {
Ok("127.0.0.1".to_string())
} else {
Ok(ip)
}
}
/// Waits for the local Streamable HTTP test server to publish OAuth metadata.
async fn wait_for_local_streamable_http_server(
server_child: &mut Child,
server_url: &str,
timeout: Duration,
) -> anyhow::Result<()> {
let deadline = Instant::now() + timeout;
let metadata_url = streamable_http_metadata_url(server_url);
let client = Client::builder().no_proxy().build()?;
loop {
if let Some(status) = server_child.try_wait()? {
return Err(anyhow::anyhow!(
"streamable HTTP server exited early with status {status}"
));
}
let remaining = deadline.saturating_duration_since(Instant::now());
if remaining.is_zero() {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: deadline reached"
));
}
match tokio::time::timeout(remaining, client.get(&metadata_url).send()).await {
Ok(Ok(response)) if response.status() == StatusCode::OK => return Ok(()),
Ok(Ok(response)) => {
if Instant::now() >= deadline {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: HTTP {}",
response.status()
));
}
}
Ok(Err(error)) => {
if Instant::now() >= deadline {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: {error}"
));
}
}
Err(_) => {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: request timed out"
));
}
}
sleep(Duration::from_millis(50)).await;
}
}
/// Waits for the remote Streamable HTTP test server via remote HTTP.
async fn wait_for_remote_streamable_http_server(
server_url: &str,
timeout: Duration,
) -> anyhow::Result<()> {
let websocket_url = std::env::var(REMOTE_EXEC_SERVER_URL_ENV_VAR).with_context(|| {
format!("{REMOTE_EXEC_SERVER_URL_ENV_VAR} must be set for remote streamable HTTP MCP tests")
})?;
let environment = Environment::create_for_tests(Some(websocket_url))?;
let http_client = environment.get_http_client();
let metadata_url = streamable_http_metadata_url(server_url);
let deadline = Instant::now() + timeout;
loop {
let remaining = deadline.saturating_duration_since(Instant::now());
if remaining.is_zero() {
return Err(anyhow::anyhow!(
"timed out waiting for remote streamable HTTP server metadata at {metadata_url}: deadline reached"
));
}
let request = HttpRequestParams {
method: "GET".to_string(),
url: metadata_url.clone(),
headers: Vec::new(),
body: None,
timeout_ms: Some(remaining.as_millis().clamp(1, 1_000) as u64),
request_id: "buffered-request".to_string(),
stream_response: false,
};
match http_client.http_request(request).await {
Ok(response) if response.status == StatusCode::OK.as_u16() => return Ok(()),
Ok(response) => {
if Instant::now() >= deadline {
return Err(anyhow::anyhow!(
"timed out waiting for remote streamable HTTP server metadata at {metadata_url}: HTTP {}",
response.status
));
}
}
Err(error) => {
if Instant::now() >= deadline {
return Err(anyhow::anyhow!(
"timed out waiting for remote streamable HTTP server metadata at {metadata_url}: {error}"
));
}
}
}
sleep(Duration::from_millis(50)).await;
}
}
/// Waits for OAuth metadata from the host-side test process.
async fn wait_for_streamable_http_metadata(
server_url: &str,
timeout: Duration,
) -> anyhow::Result<()> {
let deadline = Instant::now() + timeout;
let metadata_url = streamable_http_metadata_url(server_url);
let client = Client::builder().no_proxy().build()?;
loop {
let remaining = deadline.saturating_duration_since(Instant::now());
if remaining.is_zero() {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: deadline reached"
));
}
match tokio::time::timeout(remaining, client.get(&metadata_url).send()).await {
Ok(Ok(response)) if response.status() == StatusCode::OK => return Ok(()),
Ok(Ok(response)) => {
if Instant::now() >= deadline {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: HTTP {}",
response.status()
));
}
}
Ok(Err(error)) => {
if Instant::now() >= deadline {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: {error}"
));
}
}
Err(_) => {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: request timed out"
));
}
}
sleep(Duration::from_millis(50)).await;
}
}
/// Builds the OAuth metadata URL for the test Streamable HTTP MCP endpoint.
fn streamable_http_metadata_url(server_url: &str) -> String {
let base_url = server_url.strip_suffix("/mcp").unwrap_or(server_url);
format!("{base_url}{STREAMABLE_HTTP_METADATA_PATH}")
}
fn write_fallback_oauth_tokens(
home: &Path,
server_name: &str,
@@ -1,843 +0,0 @@
//! Core integration coverage for MCP Streamable HTTP servers.
//!
//! These tests live in the core RMCP suite and verify that Codex can discover,
//! connect to, and call Streamable HTTP MCP servers in both local and
//! remote-aware placements.
use std::net::SocketAddr;
use std::net::TcpListener;
use std::path::Path;
use std::process::Command as StdCommand;
use std::sync::Arc;
use std::time::Duration;
use anyhow::Context as _;
use anyhow::ensure;
use codex_config::types::McpServerTransportConfig;
use codex_exec_server::Environment;
use codex_exec_server::HttpRequestParams;
use codex_protocol::protocol::AskForApproval;
use codex_protocol::protocol::EventMsg;
use codex_protocol::protocol::Op;
use codex_protocol::protocol::SandboxPolicy;
use codex_protocol::user_input::UserInput;
use codex_utils_cargo_bin::cargo_bin;
use core_test_support::responses;
use core_test_support::responses::mount_sse_once;
use core_test_support::skip_if_no_network;
use core_test_support::test_codex::test_codex;
use core_test_support::wait_for_event;
use pretty_assertions::assert_eq;
use reqwest::Client;
use reqwest::StatusCode;
use serde_json::Value;
use serde_json::json;
use serial_test::serial;
use tempfile::tempdir;
use tokio::process::Child;
use tokio::process::Command;
use tokio::time::Instant;
use tokio::time::sleep;
use super::EnvVarGuard;
use super::TestMcpServerOptions;
use super::copy_binary_to_remote_env;
use super::insert_mcp_server;
use super::remote_aware_experimental_environment;
use super::remote_env_container_name;
use super::wait_for_mcp_tool;
use super::write_fallback_oauth_tokens;
/// Remote runtime websocket URL used by remote-aware MCP integration tests.
const REMOTE_EXEC_SERVER_URL_ENV_VAR: &str = "CODEX_TEST_REMOTE_EXEC_SERVER_URL";
/// OAuth metadata path served by the Streamable HTTP MCP test server.
const STREAMABLE_HTTP_METADATA_PATH: &str = "/.well-known/oauth-authorization-server/mcp";
/// Streamable HTTP test server plus the process handle needed for cleanup.
struct StreamableHttpTestServer {
server_url: String,
process: StreamableHttpTestServerProcess,
}
/// Tracks whether the Streamable HTTP test server runs on the host or remotely.
enum StreamableHttpTestServerProcess {
Local(Child),
Remote(RemoteStreamableHttpServer),
}
/// Remote Streamable HTTP server process and copied files to remove on drop.
struct RemoteStreamableHttpServer {
container_name: String,
pid: String,
paths_to_remove: Vec<String>,
}
impl Drop for RemoteStreamableHttpServer {
/// Stops the remote process and removes copied test artifacts best-effort.
fn drop(&mut self) {
self.kill();
if self.paths_to_remove.is_empty() {
return;
}
let script = format!("rm -f {}", self.paths_to_remove.join(" "));
let _ = StdCommand::new("docker")
.args(["exec", &self.container_name, "sh", "-lc", &script])
.output();
}
}
impl RemoteStreamableHttpServer {
/// Stops the remote Streamable HTTP test server process.
fn kill(&self) {
let _ = StdCommand::new("docker")
.args(["exec", &self.container_name, "kill", &self.pid])
.output();
}
}
impl StreamableHttpTestServer {
/// Returns the MCP endpoint URL that Codex should connect to.
fn url(&self) -> &str {
&self.server_url
}
/// Stops the local or remote test server and waits for local process exit.
async fn shutdown(mut self) {
match &mut self.process {
StreamableHttpTestServerProcess::Local(child) => match child.try_wait() {
Ok(Some(_)) => {}
Ok(None) => {
let _ = child.kill().await;
}
Err(error) => {
eprintln!("failed to check streamable http server status: {error}");
let _ = child.kill().await;
}
},
StreamableHttpTestServerProcess::Remote(server) => {
server.kill();
}
}
if let StreamableHttpTestServerProcess::Local(child) = &mut self.process
&& let Err(error) = child.wait().await
{
eprintln!("failed to await streamable http server shutdown: {error}");
}
}
}
/// What this tests: Codex can discover and call a Streamable HTTP MCP tool in
/// both local and remote-aware placements, and the tool observes the expected
/// environment value from the server process that actually handled the request.
#[tokio::test(flavor = "multi_thread", worker_threads = 1)]
async fn streamable_http_tool_call_round_trip() -> anyhow::Result<()> {
skip_if_no_network!(Ok(()));
// Phase 1: script the model responses so Codex will call the MCP echo tool
// and then complete the turn after the tool result is returned.
let server = responses::start_mock_server().await;
let call_id = "call-456";
let server_name = "rmcp_http";
let namespace = format!("mcp__{server_name}__");
mount_sse_once(
&server,
responses::sse(vec![
responses::ev_response_created("resp-1"),
responses::ev_function_call_with_namespace(
call_id,
&namespace,
"echo",
"{\"message\":\"ping\"}",
),
responses::ev_completed("resp-1"),
]),
)
.await;
mount_sse_once(
&server,
responses::sse(vec![
responses::ev_assistant_message(
"msg-1",
"rmcp streamable http echo tool completed successfully.",
),
responses::ev_completed("resp-2"),
]),
)
.await;
// Phase 2: start the Streamable HTTP MCP test server in the active
// placement. In full CI this may be the remote executor container; locally
// it is a host process.
let expected_env_value = "propagated-env-http";
let Some(http_server) =
start_streamable_http_test_server(expected_env_value, /*expected_token*/ None).await?
else {
return Ok(());
};
let server_url = http_server.url().to_string();
// Phase 3: configure Codex with the Streamable HTTP MCP server and build a
// fixture that selects remote MCP placement only when the remote test
// environment is active.
let fixture = test_codex()
.with_config(move |config| {
insert_mcp_server(
config,
server_name,
McpServerTransportConfig::StreamableHttp {
url: server_url,
bearer_token_env_var: None,
http_headers: None,
env_http_headers: None,
},
TestMcpServerOptions {
experimental_environment: remote_aware_experimental_environment(),
..Default::default()
},
);
})
.build_remote_aware(&server)
.await?;
let session_model = fixture.session_configured.model.clone();
// Phase 4: submit the user turn that should trigger the MCP tool call.
fixture
.codex
.submit(Op::UserTurn {
items: vec![UserInput::Text {
text: "call the rmcp streamable http echo tool".into(),
text_elements: Vec::new(),
}],
final_output_json_schema: None,
cwd: fixture.cwd.path().to_path_buf(),
approval_policy: AskForApproval::Never,
approvals_reviewer: None,
sandbox_policy: SandboxPolicy::new_read_only_policy(),
model: session_model,
effort: None,
summary: None,
service_tier: None,
collaboration_mode: None,
personality: None,
environments: None,
})
.await?;
// Phase 5: assert Codex begins the expected tool invocation.
let begin_event = wait_for_event(&fixture.codex, |ev| {
matches!(ev, EventMsg::McpToolCallBegin(_))
})
.await;
let EventMsg::McpToolCallBegin(begin) = begin_event else {
unreachable!("event guard guarantees McpToolCallBegin");
};
assert_eq!(begin.invocation.server, server_name);
assert_eq!(begin.invocation.tool, "echo");
// Phase 6: assert the tool result proves the server handled the request and
// propagated the expected environment value.
let end_event = wait_for_event(&fixture.codex, |ev| {
matches!(ev, EventMsg::McpToolCallEnd(_))
})
.await;
let EventMsg::McpToolCallEnd(end) = end_event else {
unreachable!("event guard guarantees McpToolCallEnd");
};
let result = end
.result
.as_ref()
.expect("rmcp echo tool should return success");
assert_eq!(result.is_error, Some(false));
assert!(
result.content.is_empty(),
"content should default to an empty array"
);
let structured = result
.structured_content
.as_ref()
.expect("structured content");
let Value::Object(map) = structured else {
panic!("structured content should be an object: {structured:?}");
};
let echo_value = map
.get("echo")
.and_then(Value::as_str)
.expect("echo payload present");
assert_eq!(echo_value, "ECHOING: ping");
let env_value = map
.get("env")
.and_then(Value::as_str)
.expect("env snapshot inserted");
assert_eq!(env_value, expected_env_value);
// Phase 7: verify the scripted model calls were consumed and clean up the
// placement-aware MCP server.
wait_for_event(&fixture.codex, |ev| matches!(ev, EventMsg::TurnComplete(_))).await;
server.verify().await;
http_server.shutdown().await;
Ok(())
}
/// This test writes to a fallback credentials file in CODEX_HOME.
/// Ideally, we wouldn't need to serialize the test but it's much more cumbersome to wire CODEX_HOME through the code.
#[test]
#[serial(codex_home)]
fn streamable_http_with_oauth_round_trip() -> anyhow::Result<()> {
const TEST_STACK_SIZE_BYTES: usize = 8 * 1024 * 1024;
let handle = std::thread::Builder::new()
.name("streamable_http_with_oauth_round_trip".to_string())
.stack_size(TEST_STACK_SIZE_BYTES)
.spawn(|| -> anyhow::Result<()> {
let runtime = tokio::runtime::Builder::new_multi_thread()
.worker_threads(1)
.enable_all()
.build()?;
runtime.block_on(streamable_http_with_oauth_round_trip_impl())
})?;
match handle.join() {
Ok(result) => result,
Err(_) => Err(anyhow::anyhow!(
"streamable_http_with_oauth_round_trip thread panicked"
)),
}
}
#[allow(clippy::expect_used)]
async fn streamable_http_with_oauth_round_trip_impl() -> anyhow::Result<()> {
skip_if_no_network!(Ok(()));
// Phase 1: script the model responses so Codex will call the OAuth-backed
// MCP echo tool and then finish the turn after receiving the result.
let server = responses::start_mock_server().await;
let call_id = "call-789";
let server_name = "rmcp_http_oauth";
let tool_name = format!("mcp__{server_name}__echo");
let namespace = format!("mcp__{server_name}__");
mount_sse_once(
&server,
responses::sse(vec![
responses::ev_response_created("resp-1"),
responses::ev_function_call_with_namespace(
call_id,
&namespace,
"echo",
"{\"message\":\"ping\"}",
),
responses::ev_completed("resp-1"),
]),
)
.await;
mount_sse_once(
&server,
responses::sse(vec![
responses::ev_assistant_message(
"msg-1",
"rmcp streamable http oauth echo tool completed successfully.",
),
responses::ev_completed("resp-2"),
]),
)
.await;
// Phase 2: start the Streamable HTTP MCP test server with bearer-token
// enforcement enabled so the client must use stored OAuth credentials.
let expected_env_value = "propagated-env-http-oauth";
let expected_token = "initial-access-token";
let client_id = "test-client-id";
let refresh_token = "initial-refresh-token";
let Some(http_server) =
start_streamable_http_test_server(expected_env_value, Some(expected_token)).await?
else {
return Ok(());
};
let server_url = http_server.url().to_string();
// Phase 3: seed an isolated CODEX_HOME with fallback OAuth tokens for this
// server so the test does not share credentials with other suite cases.
let temp_home = Arc::new(tempdir()?);
let _codex_home_guard = EnvVarGuard::set("CODEX_HOME", temp_home.path().as_os_str());
write_fallback_oauth_tokens(
temp_home.path(),
server_name,
&server_url,
client_id,
expected_token,
refresh_token,
)?;
// Phase 4: configure Codex with the OAuth-backed Streamable HTTP MCP
// server and build the fixture in the active local or remote-aware mode.
let fixture = test_codex()
.with_home(temp_home.clone())
.with_config(move |config| {
// Keep OAuth credentials isolated to this test home because Bazel
// runs the full core suite in one process.
config.mcp_oauth_credentials_store_mode = serde_json::from_value(json!("file"))
.expect("`file` should deserialize as OAuthCredentialsStoreMode");
insert_mcp_server(
config,
server_name,
McpServerTransportConfig::StreamableHttp {
url: server_url,
bearer_token_env_var: None,
http_headers: None,
env_http_headers: None,
},
TestMcpServerOptions {
experimental_environment: remote_aware_experimental_environment(),
..Default::default()
},
);
})
.build_remote_aware(&server)
.await?;
let session_model = fixture.session_configured.model.clone();
// Phase 5: wait for MCP discovery to publish the expected tool before the
// turn is submitted, which keeps failures tied to server startup/discovery.
wait_for_mcp_tool(&fixture, &tool_name).await?;
// Phase 6: submit the user turn that should invoke the OAuth-backed tool.
fixture
.codex
.submit(Op::UserTurn {
items: vec![UserInput::Text {
text: "call the rmcp streamable http oauth echo tool".into(),
text_elements: Vec::new(),
}],
final_output_json_schema: None,
cwd: fixture.cwd.path().to_path_buf(),
approval_policy: AskForApproval::Never,
approvals_reviewer: None,
sandbox_policy: SandboxPolicy::new_read_only_policy(),
model: session_model,
effort: None,
summary: None,
service_tier: None,
collaboration_mode: None,
personality: None,
environments: None,
})
.await?;
// Phase 7: assert Codex begins the expected tool invocation.
let begin_event = wait_for_event(&fixture.codex, |ev| {
matches!(ev, EventMsg::McpToolCallBegin(_))
})
.await;
let EventMsg::McpToolCallBegin(begin) = begin_event else {
unreachable!("event guard guarantees McpToolCallBegin");
};
assert_eq!(begin.invocation.server, server_name);
assert_eq!(begin.invocation.tool, "echo");
// Phase 8: assert the tool result proves the authenticated request reached
// the server and preserved the expected environment value.
let end_event = wait_for_event(&fixture.codex, |ev| {
matches!(ev, EventMsg::McpToolCallEnd(_))
})
.await;
let EventMsg::McpToolCallEnd(end) = end_event else {
unreachable!("event guard guarantees McpToolCallEnd");
};
let result = end
.result
.as_ref()
.expect("rmcp echo tool should return success");
assert_eq!(result.is_error, Some(false));
assert!(
result.content.is_empty(),
"content should default to an empty array"
);
let structured = result
.structured_content
.as_ref()
.expect("structured content");
let Value::Object(map) = structured else {
panic!("structured content should be an object: {structured:?}");
};
let echo_value = map
.get("echo")
.and_then(Value::as_str)
.expect("echo payload present");
assert_eq!(echo_value, "ECHOING: ping");
let env_value = map
.get("env")
.and_then(Value::as_str)
.expect("env snapshot inserted");
assert_eq!(env_value, expected_env_value);
// Phase 9: verify the scripted model calls were consumed and clean up the
// placement-aware MCP server.
wait_for_event(&fixture.codex, |ev| matches!(ev, EventMsg::TurnComplete(_))).await;
server.verify().await;
http_server.shutdown().await;
Ok(())
}
/// Starts the Streamable HTTP MCP test server in the active test placement.
async fn start_streamable_http_test_server(
expected_env_value: &str,
expected_token: Option<&str>,
) -> anyhow::Result<Option<StreamableHttpTestServer>> {
let rmcp_http_server_bin = match cargo_bin("test_streamable_http_server") {
Ok(path) => path,
Err(err) => {
eprintln!("test_streamable_http_server binary not available, skipping test: {err}");
return Ok(None);
}
};
if let Some(container_name) = remote_env_container_name()? {
return Ok(Some(
start_remote_streamable_http_test_server(
&container_name,
&rmcp_http_server_bin,
expected_env_value,
expected_token,
)
.await?,
));
}
let listener = TcpListener::bind("127.0.0.1:0")?;
let port = listener.local_addr()?.port();
drop(listener);
let bind_addr = format!("127.0.0.1:{port}");
let server_url = format!("http://{bind_addr}/mcp");
let mut command = Command::new(&rmcp_http_server_bin);
command
.kill_on_drop(true)
.env("MCP_STREAMABLE_HTTP_BIND_ADDR", &bind_addr)
.env("MCP_TEST_VALUE", expected_env_value);
if let Some(expected_token) = expected_token {
command.env("MCP_EXPECT_BEARER", expected_token);
}
let mut child = command.spawn()?;
wait_for_local_streamable_http_server(&mut child, &server_url, Duration::from_secs(5)).await?;
Ok(Some(StreamableHttpTestServer {
server_url,
process: StreamableHttpTestServerProcess::Local(child),
}))
}
/// Starts the Streamable HTTP MCP test server inside the remote test container.
async fn start_remote_streamable_http_test_server(
container_name: &str,
rmcp_http_server_bin: &Path,
expected_env_value: &str,
expected_token: Option<&str>,
) -> anyhow::Result<StreamableHttpTestServer> {
let remote_path = copy_binary_to_remote_env(
container_name,
rmcp_http_server_bin,
"test_streamable_http_server",
)?;
let bound_addr_file = format!("{remote_path}.addr");
let log_file = format!("{remote_path}.log");
let mut env_assignments = vec![
format!(
"MCP_STREAMABLE_HTTP_BIND_ADDR={}",
sh_single_quote("0.0.0.0:0")
),
format!(
"MCP_STREAMABLE_HTTP_BOUND_ADDR_FILE={}",
sh_single_quote(&bound_addr_file)
),
format!("MCP_TEST_VALUE={}", sh_single_quote(expected_env_value)),
];
if let Some(expected_token) = expected_token {
env_assignments.push(format!(
"MCP_EXPECT_BEARER={}",
sh_single_quote(expected_token)
));
}
let script = format!(
"{} nohup {} > {} 2>&1 < /dev/null & echo $!",
env_assignments.join(" "),
sh_single_quote(&remote_path),
sh_single_quote(&log_file)
);
let start_output = StdCommand::new("docker")
.args(["exec", container_name, "sh", "-lc", &script])
.output()
.context("start remote streamable HTTP MCP test server")?;
ensure!(
start_output.status.success(),
"docker start streamable HTTP MCP test server failed: stdout={} stderr={}",
String::from_utf8_lossy(&start_output.stdout).trim(),
String::from_utf8_lossy(&start_output.stderr).trim()
);
let pid = String::from_utf8(start_output.stdout)
.context("remote streamable HTTP server pid must be utf-8")?
.trim()
.to_string();
ensure!(
!pid.is_empty(),
"remote streamable HTTP server pid is empty"
);
let remote_bind_addr =
wait_for_remote_bound_addr(container_name, &bound_addr_file, Duration::from_secs(5))
.await?;
let container_ip = remote_container_ip(container_name)?;
let server_url = format!("http://{}:{}/mcp", container_ip, remote_bind_addr.port());
// The orchestrator can see the Docker container IP, but the behavior under
// test is whether the remote-side MCP client can reach it. Probe through
// remote HTTP before handing the URL to the Codex fixture.
wait_for_remote_streamable_http_server(&server_url, Duration::from_secs(5)).await?;
if expected_token.is_some() {
wait_for_streamable_http_metadata(&server_url, Duration::from_secs(5)).await?;
}
Ok(StreamableHttpTestServer {
server_url,
process: StreamableHttpTestServerProcess::Remote(RemoteStreamableHttpServer {
container_name: container_name.to_string(),
pid,
paths_to_remove: vec![remote_path, bound_addr_file, log_file],
}),
})
}
/// Single-quotes a value for the small shell snippets sent through Docker.
fn sh_single_quote(value: &str) -> String {
format!("'{}'", value.replace('\'', "'\\''"))
}
/// Waits until the remote test server writes the socket address it bound to.
async fn wait_for_remote_bound_addr(
container_name: &str,
bound_addr_file: &str,
timeout: Duration,
) -> anyhow::Result<SocketAddr> {
let deadline = Instant::now() + timeout;
loop {
let output = StdCommand::new("docker")
.args(["exec", container_name, "cat", bound_addr_file])
.output()
.context("read remote streamable HTTP server bound address")?;
if output.status.success() {
let bound_addr = String::from_utf8(output.stdout)
.context("remote streamable HTTP bound address must be utf-8")?;
return bound_addr
.trim()
.parse()
.context("parse remote streamable HTTP bound address");
}
if Instant::now() >= deadline {
return Err(anyhow::anyhow!(
"timed out waiting for remote streamable HTTP bound address: {}",
String::from_utf8_lossy(&output.stderr).trim()
));
}
sleep(Duration::from_millis(50)).await;
}
}
/// Reads the container IP that the host-side test process can use.
fn remote_container_ip(container_name: &str) -> anyhow::Result<String> {
let output = StdCommand::new("docker")
.args([
"inspect",
"-f",
"{{range .NetworkSettings.Networks}}{{println .IPAddress}}{{end}}",
container_name,
])
.output()
.context("inspect remote MCP test container IP")?;
ensure!(
output.status.success(),
"docker inspect remote MCP test container IP failed: stdout={} stderr={}",
String::from_utf8_lossy(&output.stdout).trim(),
String::from_utf8_lossy(&output.stderr).trim()
);
let inspect_output =
String::from_utf8(output.stdout).context("remote MCP test container IP must be utf-8")?;
let ip = inspect_output
.lines()
.map(str::trim)
.find(|line| !line.is_empty())
.unwrap_or_default()
.to_string();
if ip.is_empty() {
Ok("127.0.0.1".to_string())
} else {
Ok(ip)
}
}
/// Waits for the local Streamable HTTP test server to publish OAuth metadata.
async fn wait_for_local_streamable_http_server(
server_child: &mut Child,
server_url: &str,
timeout: Duration,
) -> anyhow::Result<()> {
let deadline = Instant::now() + timeout;
let metadata_url = streamable_http_metadata_url(server_url);
let client = Client::builder().no_proxy().build()?;
loop {
if let Some(status) = server_child.try_wait()? {
return Err(anyhow::anyhow!(
"streamable HTTP server exited early with status {status}"
));
}
let remaining = deadline.saturating_duration_since(Instant::now());
if remaining.is_zero() {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: deadline reached"
));
}
match tokio::time::timeout(remaining, client.get(&metadata_url).send()).await {
Ok(Ok(response)) if response.status() == StatusCode::OK => return Ok(()),
Ok(Ok(response)) => {
if Instant::now() >= deadline {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: HTTP {}",
response.status()
));
}
}
Ok(Err(error)) => {
if Instant::now() >= deadline {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: {error}"
));
}
}
Err(_) => {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: request timed out"
));
}
}
sleep(Duration::from_millis(50)).await;
}
}
/// Waits for the remote Streamable HTTP test server via remote HTTP.
async fn wait_for_remote_streamable_http_server(
server_url: &str,
timeout: Duration,
) -> anyhow::Result<()> {
let websocket_url = std::env::var(REMOTE_EXEC_SERVER_URL_ENV_VAR).with_context(|| {
format!("{REMOTE_EXEC_SERVER_URL_ENV_VAR} must be set for remote streamable HTTP MCP tests")
})?;
let environment = Environment::create_for_tests(Some(websocket_url))?;
let http_client = environment.get_http_client();
let metadata_url = streamable_http_metadata_url(server_url);
let deadline = Instant::now() + timeout;
loop {
let remaining = deadline.saturating_duration_since(Instant::now());
if remaining.is_zero() {
return Err(anyhow::anyhow!(
"timed out waiting for remote streamable HTTP server metadata at {metadata_url}: deadline reached"
));
}
let request = HttpRequestParams {
method: "GET".to_string(),
url: metadata_url.clone(),
headers: Vec::new(),
body: None,
timeout_ms: Some(remaining.as_millis().clamp(1, 1_000) as u64),
request_id: "buffered-request".to_string(),
stream_response: false,
};
match http_client.http_request(request).await {
Ok(response) if response.status == StatusCode::OK.as_u16() => return Ok(()),
Ok(response) => {
if Instant::now() >= deadline {
return Err(anyhow::anyhow!(
"timed out waiting for remote streamable HTTP server metadata at {metadata_url}: HTTP {}",
response.status
));
}
}
Err(error) => {
if Instant::now() >= deadline {
return Err(anyhow::anyhow!(
"timed out waiting for remote streamable HTTP server metadata at {metadata_url}: {error}"
));
}
}
}
sleep(Duration::from_millis(50)).await;
}
}
/// Waits for OAuth metadata from the host-side test process.
async fn wait_for_streamable_http_metadata(
server_url: &str,
timeout: Duration,
) -> anyhow::Result<()> {
let deadline = Instant::now() + timeout;
let metadata_url = streamable_http_metadata_url(server_url);
let client = Client::builder().no_proxy().build()?;
loop {
let remaining = deadline.saturating_duration_since(Instant::now());
if remaining.is_zero() {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: deadline reached"
));
}
match tokio::time::timeout(remaining, client.get(&metadata_url).send()).await {
Ok(Ok(response)) if response.status() == StatusCode::OK => return Ok(()),
Ok(Ok(response)) => {
if Instant::now() >= deadline {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: HTTP {}",
response.status()
));
}
}
Ok(Err(error)) => {
if Instant::now() >= deadline {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: {error}"
));
}
}
Err(_) => {
return Err(anyhow::anyhow!(
"timed out waiting for streamable HTTP server metadata at {metadata_url}: request timed out"
));
}
}
sleep(Duration::from_millis(50)).await;
}
}
/// Builds the OAuth metadata URL for the test Streamable HTTP MCP endpoint.
fn streamable_http_metadata_url(server_url: &str) -> String {
let base_url = server_url.strip_suffix("/mcp").unwrap_or(server_url);
format!("{base_url}{STREAMABLE_HTTP_METADATA_PATH}")
}