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API Reference ​

This page summarizes the main public APIs exposed by Vix Core.

Use it when you want a quick reference for vix::App, routing, handlers, middleware, requests, responses, sessions, transports, TLS, configuration, and the runtime executor.

Public header ​

cpp
#include <vix.hpp>

You can also include the core header directly:

cpp
#include <vix/core.hpp>

Main aliases ​

vix/core.hpp exposes the main developer-facing aliases.

cpp
namespace vix
{
  using App = vix::App;
  using AppPtr = std::shared_ptr<App>;

  using SessionPtr = std::shared_ptr<vix::session::Session>;

  using Request = vix::http::Request;
  using Response = vix::http::ResponseWrapper;

  namespace tmpl = vix::template_;
}

Most examples use:

cpp
vix::App app;
vix::Request &req;
vix::Response &res;
vix::tmpl::Context ctx;

vix::App ​

Header:

cpp
#include <vix/app/App.hpp>

vix::App is the main application object.

It owns or coordinates:

text
Config
Router
RuntimeExecutor
HTTPServer
middleware
templates
static files
server lifecycle

Construction ​

cpp
vix::App app;

Create an app with a custom executor:

cpp
auto executor = std::make_shared<vix::executor::RuntimeExecutor>(4);

vix::App app{executor};

Lifecycle ​

APIPurpose
run(int port = 8080)Start the server and block until shutdown.
run(const vix::config::Config &cfg)Start the server using an explicit config and block.
listen(int port = 8080, ListenCallback cb = {})Start the server asynchronously.
listen(const vix::config::Config &cfg, ListenCallback cb = {})Start asynchronously using an explicit config.
listen_port(int port, ListenPortCallback cb = {})Start and pass the bound port to a callback.
wait()Wait until shutdown is requested.
close()Stop the server and release resources.
is_running()Return whether the app is running.
set_shutdown_callback(cb)Register shutdown logic.
request_stop_from_signal()Request stop from a signal handler.

Example:

cpp
#include <vix.hpp>

int main()
{
  vix::App app;

  app.get("/", [](vix::Request &req, vix::Response &res)
  {
    (void)req;

    res.text("Hello from Vix");
  });

  app.run(8080);

  return 0;
}

Route registration ​

APIPurpose
get(path, handler)Register a GET route.
post(path, handler)Register a POST route.
put(path, handler)Register a PUT route.
patch(path, handler)Register a PATCH route.
del(path, handler)Register a DELETE route.
head(path, handler)Register a HEAD route.
options(path, handler)Register an OPTIONS route.
get_heavy(path, handler)Register a heavy GET route.
post_heavy(path, handler)Register a heavy POST route.

Example:

cpp
app.get("/status", [](vix::Request &req, vix::Response &res)
{
  (void)req;

  res.json({
    "status", "ok"
  });
});

Middleware ​

APIPurpose
use(middleware)Register global middleware.
use(prefix, middleware)Register prefix middleware.
protect(prefix, middleware)Protect a route prefix.
protect_exact(path, middleware)Protect one exact path.

Middleware signature:

cpp
void(vix::Request &req, vix::Response &res, vix::App::Next next)

Example:

cpp
app.use("/admin", [](vix::Request &req, vix::Response &res, vix::App::Next next)
{
  if (!req.has_header("Authorization"))
  {
    res.status(401).json({
      "error", "unauthorized"
    });
    return;
  }

  next();
});

Groups ​

APIPurpose
group(prefix, fn)Create a temporary route group and invoke a callback.
group(prefix)Return a reusable group object.

Example:

cpp
app.group("/api", [](auto &api)
{
  api.get("/status", [](vix::Request &req, vix::Response &res)
  {
    (void)req;

    res.json({"status", "ok"});
  });
});

Static files ​

APIPurpose
static_dir(root, mount, index_file, add_cache_control, cache_control, fallthrough)Mount a static directory.
set_static_handler(fn)Install a custom static file handler implementation.

Common usage:

cpp
app.static_dir("public", "/");

With explicit options:

cpp
app.static_dir(
    "public",
    "/",
    "index.html",
    true,
    "public, max-age=3600",
    true);

Templates ​

APIPurpose
templates(directory)Configure the template root directory.
has_views()Return whether templates are configured.
views()Access the template view facade.

Example:

cpp
app.templates("views");

app.get("/", [](vix::Request &req, vix::Response &res)
{
  (void)req;

  vix::tmpl::Context ctx;
  ctx.set("title", "Home");

  res.render("index.html", ctx);
});

Accessors ​

APIPurpose
config()Return the mutable app configuration.
router()Return the shared router.
server()Return the underlying HTTP server.
executor()Return the runtime executor.
server_ready_info()Return the last server ready info.
has_server_ready_info()Return whether ready info is available.
setDevMode(value)Enable or disable development mode.
isDevMode()Return whether development mode is enabled.

Router ​

Header:

cpp
#include <vix/router/Router.hpp>

vix::router::Router matches HTTP methods and paths to handlers.

Main APIs ​

APIPurpose
setNotFoundHandler(handler)Set a custom not-found handler.
add_route(method, path, handler)Register a route.
add_route(method, path, handler, options)Register a route with options.
add_route(method, path, handler, options, doc)Register a route with options and docs metadata.
handle_request(req, res)Dispatch a request to the matching handler.
is_heavy(req)Return whether the matched route is heavy.
has_route(method, path)Return whether a route exists.
routes()Return registered route records.
strip_query(target)Remove query string from a target.

Example:

cpp
if (app.router()->has_route("GET", "/status"))
{
  vix::print("route exists");
}

Route records ​

cpp
struct RouteRecord
{
  std::string method;
  std::string path;
  bool heavy;
  RouteDoc doc;
};

List routes:

cpp
for (const auto &route : app.router()->routes())
{
  vix::print(route.method, route.path);
}

Route options ​

Header:

cpp
#include <vix/router/RouteOptions.hpp>
cpp
struct RouteOptions
{
  bool heavy{false};
};

Use through app helpers:

cpp
app.get_heavy("/reports", handler);
app.post_heavy("/reports", handler);

Or directly through the router:

cpp
vix::router::RouteOptions opt;
opt.heavy = true;

Route documentation ​

Header:

cpp
#include <vix/router/RouteDoc.hpp>
cpp
struct RouteDoc
{
  std::string summary;
  std::string description;
  std::vector<std::string> tags;

  nlohmann::json request_body;
  nlohmann::json responses;
  nlohmann::json x;

  bool empty() const noexcept;
};

RouteDoc is used by documentation and OpenAPI tooling.

Route node ​

Header:

cpp
#include <vix/router/RouteNode.hpp>

RouteNode is the internal routing tree node.

It stores:

text
children
handler
isParam
paramName
heavy

Main APIs:

APIPurpose
has_handler()Return whether this node has a terminal handler.
has_child(segment)Return whether a child exists.
find_child(segment)Return a child node or nullptr.
get_or_create_child(segment)Get or create a child node.
mark_as_param(name)Mark the node as a path parameter.
set_handler(handler)Assign the terminal request handler.
set_heavy(value)Mark the route as heavy or not heavy.

Most application code does not use RouteNode directly.

Request handlers ​

Headers:

cpp
#include <vix/http/IRequestHandler.hpp>
#include <vix/http/RequestHandler.hpp>

IRequestHandler ​

IRequestHandler is the internal interface used by the router.

cpp
class IRequestHandler
{
public:
  virtual vix::async::core::task<void> handle_request(
      const Request &req,
      Response &res) = 0;
};

The router stores handlers through this interface.

RequestHandler ​

RequestHandler<Handler> adapts a user handler to IRequestHandler.

Common user handler shape:

cpp
[](vix::Request &req, vix::Response &res)
{
  res.text("OK");
}

The adapter handles:

text
route parameter extraction
ResponseWrapper creation
user handler invocation
auto-send return values
response finalization
error handling

Request ​

Header:

cpp
#include <vix/http/Request.hpp>

vix::Request is an alias for vix::http::Request.

Types ​

cpp
using ParamMap = std::unordered_map<std::string, std::string>;
using QueryMap = std::unordered_map<std::string, std::string>;
using HeaderMap = std::unordered_map<std::string, std::string>;
using StatePtr = std::shared_ptr<vix::http::RequestState>;

Method and target ​

APIPurpose
method()Return the HTTP method.
set_method(method)Set the HTTP method.
target()Return the full request target.
set_target(target)Set target and recompute path/query data.
path()Return the path without query string.
query_string()Return the raw query string.

Example:

cpp
res.json({
  "method", req.method(),
  "path", req.path(),
  "target", req.target()
});

Route parameters ​

APIPurpose
params()Return all route parameters.
set_params(params)Replace route parameters.
has_param(name)Check if a route parameter exists.
param(name, fallback)Return a route parameter.
with_params(params)Return a copy with new params.

Example:

cpp
app.get("/users/{id}", [](vix::Request &req, vix::Response &res)
{
  res.json({
    "id", req.param("id")
  });
});

Query parameters ​

APIPurpose
query()Return parsed query parameters.
has_query(name)Check if a query parameter exists.
query_value(name, fallback)Return a query value.

Example:

cpp
const std::string page = req.query_value("page", "1");

Headers ​

APIPurpose
headers()Return all headers.
set_headers(headers)Replace all headers.
header(name)Return one header value or an empty string.
has_header(name)Check whether a header exists.
set_header(name, value)Set one header.
remove_header(name)Remove one header.

Example:

cpp
if (!req.has_header("Authorization"))
{
  res.status(401).json({"error", "unauthorized"});
  return;
}

Body and JSON ​

APIPurpose
body()Return the request body.
set_body(body)Replace the request body.
json()Parse and return the body as JSON.
json_as<T>()Convert JSON body to type T.

Example:

cpp
app.post("/echo", [](vix::Request &req, vix::Response &res)
{
  res.json({
    "body", req.body()
  });
});

State ​

APIPurpose
has_state()Return whether a state container exists.
state()Access request-scoped state.
has_state_type<T>()Return whether state contains T.

Example:

cpp
struct CurrentUser
{
  std::string id;
};

req.state().set(CurrentUser{"42"});

const auto &user = req.state().get<CurrentUser>();

RequestState ​

Header:

cpp
#include <vix/http/RequestState.hpp>

RequestState is type-safe request-scoped storage.

APIs ​

APIPurpose
emplace<T>(args...)Construct and store a value of type T.
set<T>(value)Store or replace a value of type T.
has<T>()Return whether a value of type T exists.
get<T>()Return a stored value or throw if missing.
try_get<T>()Return a pointer to a stored value or nullptr.

Example:

cpp
struct CurrentUser
{
  std::string id;
};

app.use([](vix::Request &req, vix::Response &res, vix::App::Next next)
{
  (void)res;

  req.state().set(CurrentUser{"42"});

  next();
});

app.get("/me", [](vix::Request &req, vix::Response &res)
{
  const auto &user = req.state().get<CurrentUser>();

  res.json({
    "id", user.id
  });
});

Response ​

Headers:

cpp
#include <vix/http/Response.hpp>
#include <vix/http/ResponseWrapper.hpp>

vix::Response is an alias for vix::http::ResponseWrapper.

The lower-level native response object is vix::http::Response.

ResponseWrapper ​

ResponseWrapper is the public helper used in handlers.

Status ​

APIPurpose
status(code)Set the HTTP status code.
set_status(code)Alias for status(code).
status_c<Code>()Set a compile-time status code.
set_status_c<Code>()Alias for status_c<Code>().
sendStatus(code)Send a status response.

Example:

cpp
res.status(201).json({
  "created", true
});

Headers ​

APIPurpose
header(name, value)Set a response header.
set(name, value)Alias for header(name, value).
append(name, value)Append a header value.
type(mime)Set Content-Type.
contentType(mime)Alias for type(mime).
has_header(name)Return whether a header exists.

Example:

cpp
res.header("X-App", "Vix.cpp");
res.type("text/plain; charset=utf-8");

Body helpers ​

APIPurpose
send()Send an empty or current response.
send(value)Send a value.
text(data)Send plain text.
json(value)Send JSON.
redirect(url)Send a redirect.
redirect(code, url)Send a redirect with explicit status.
file(path)Send a file.
render(name, context)Render a template.
has_body()Return whether the body is non-empty.

Example:

cpp
res.text("OK");
res.json({"ok", true});
res.redirect("/login");
res.file("public/index.html");

Native Response ​

Header:

cpp
#include <vix/http/Response.hpp>

vix::http::Response stores the raw HTTP response state.

APIs ​

APIPurpose
status()Return the status code.
set_status(code)Set the status code.
body()Return the body.
set_body(body)Replace the body.
headers()Return response headers.
set_headers(headers)Replace all headers.
has_header(name)Check whether a header exists.
header(name)Return one header value.
set_header(name, value)Set one header.
remove_header(name)Remove one header.
clear_headers()Remove all headers.
should_close()Return whether the connection should close.
set_should_close(value)Set close behavior.
reason()Return custom reason phrase.
set_reason(reason)Set custom reason phrase.
clear_reason()Clear custom reason phrase.
version()Return HTTP version.
set_version(version)Set HTTP version.
to_http_string()Serialize response to raw HTTP text.

Advanced example:

cpp
res.res.set_status(200);
res.res.set_header("X-App", "Vix");
res.res.set_body("hello");

Prefer wrapper methods in normal code:

cpp
res.status(200).text("hello");

Status codes ​

Header:

cpp
#include <vix/http/Status.hpp>

Common constants ​

cpp
vix::http::OK
vix::http::CREATED
vix::http::ACCEPTED
vix::http::NO_CONTENT

vix::http::BAD_REQUEST
vix::http::UNAUTHORIZED
vix::http::FORBIDDEN
vix::http::NOT_FOUND
vix::http::PAYLOAD_TOO_LARGE

vix::http::INTERNAL_ERROR
vix::http::SERVICE_UNAVAILABLE

Helpers ​

APIPurpose
is_valid_status(code)Return whether code is in 100..599.
normalize_status(code)Return the code if valid, otherwise 500.
reason_phrase(code)Return the canonical reason phrase.
status_to_string(code)Return a status string.

Example:

cpp
res.status(vix::http::OK).json({
  "status", "ok"
});

HTTPServer ​

Header:

cpp
#include <vix/server/HTTPServer.hpp>

HTTPServer is the native async HTTP server used by App.

Most applications access it through:

cpp
auto &server = app.server();

APIs ​

APIPurpose
run()Start I/O threads, startup coroutine, and monitor.
start_accept()Start accepting connections.
calculate_io_thread_count()Compute I/O thread count.
getRouter()Return the shared router.
monitor_metrics()Start the metrics monitor.
stop_async()Request asynchronous shutdown.
stop_blocking()Stop and join internal threads.
join_threads()Join server-owned threads.
bound_port()Return the actual bound port.
is_stop_requested()Return whether shutdown was requested.
executor()Return the runtime executor.

Example:

cpp
const int port = app.server().bound_port();

Session ​

Header:

cpp
#include <vix/session/Session.hpp>

Session represents one client connection.

Most applications do not create sessions manually.

APIs ​

APIPurpose
Session(stream, router, config, executor)Create a session from a TCP stream.
Session(transport, router, config, executor)Create a session from a generic transport.
run()Start the session lifecycle.
read_request()Read and parse the next request.
dispatch_request(req)Dispatch a request to the router.
send_response(res)Serialize and write a response.
send_error(status, msg)Send a standard error response.
close_stream_gracefully()Close the transport safely.

Session flow:

text
read request
  -> dispatch request
  -> send response
  -> repeat or close

Transport ​

Header:

cpp
#include <vix/session/Transport.hpp>

Transport is the abstract byte I/O interface used by sessions.

cpp
class Transport
{
public:
  virtual task<std::size_t> async_read(
      std::span<std::byte> buffer,
      cancel_token token) = 0;

  virtual task<std::size_t> async_write(
      std::span<const std::byte> buffer,
      cancel_token token) = 0;

  virtual bool is_open() const noexcept = 0;

  virtual void close() noexcept = 0;
};

APIs ​

APIPurpose
async_read(buffer, token)Read bytes.
async_write(buffer, token)Write bytes.
is_open()Check whether the connection is open.
close()Close the connection.

PlainTransport ​

Header:

cpp
#include <vix/session/PlainTransport.hpp>

PlainTransport adapts a native TCP stream to Transport.

text
tcp_stream
  -> PlainTransport
  -> Session

APIs ​

APIPurpose
PlainTransport(stream)Create a plain transport from a TCP stream.
async_read(buffer, token)Read bytes from the TCP stream.
async_write(buffer, token)Write bytes to the TCP stream.
is_open()Return whether the TCP stream is open.
close()Close the TCP stream.

TLS ​

Headers:

cpp
#include <vix/server/TlsConfig.hpp>
#include <vix/session/TlsSession.hpp>
#include <vix/session/TlsTransport.hpp>

TlsConfig ​

TlsConfig describes TLS settings.

cpp
struct TlsConfig
{
  bool enabled{false};
  std::string cert_file{};
  std::string key_file{};

  bool is_enabled() const noexcept;
  bool is_configured() const noexcept;
  bool is_valid() const noexcept;
};

APIs ​

APIPurpose
enabledEnable or disable TLS.
cert_fileCertificate file path.
key_filePrivate key file path.
is_enabled()Return whether TLS is enabled.
is_configured()Return whether certificate and key paths are set.
is_valid()Return whether TLS is enabled and configured.

Example:

cpp
vix::server::TlsConfig tls;

tls.enabled = true;
tls.cert_file = "/etc/letsencrypt/live/example.com/fullchain.pem";
tls.key_file = "/etc/letsencrypt/live/example.com/privkey.pem";

TlsSession ​

TlsSession owns an accepted TCP stream during TLS setup.

APIs ​

APIPurpose
TlsSession(stream, router, config, executor)Create a TLS session from an accepted TCP stream.
run()Perform TLS handshake and run the HTTP session.

Flow:

text
tcp_stream
  -> TlsSession
  -> TlsTransport
  -> TLS handshake
  -> Session

TlsTransport ​

TlsTransport adapts a TCP stream into encrypted transport.

APIs ​

APIPurpose
TlsTransport(stream, config)Create a TLS transport.
async_handshake(token)Perform TLS server handshake.
async_read(buffer, token)Read decrypted bytes.
async_write(buffer, token)Write encrypted bytes.
is_open()Return whether the transport is open.
close()Close TLS and TCP resources.

Config ​

Header:

cpp
#include <vix/config/Config.hpp>

vix::config::Config stores server and application configuration.

Construction ​

cpp
vix::config::Config cfg;
vix::config::Config production{".env.production"};

General APIs ​

APIPurpose
loadConfig()Reload configuration.
set(key, value)Set a dotted key.
has(key)Return whether a dotted key exists.
getInt(key, fallback)Read an integer value.
getBool(key, fallback)Read a boolean value.
getString(key, fallback)Read a string value.

Server APIs ​

APIPurpose
setServerPort(port)Set server port.
getServerPort()Return server port.
getRequestTimeout()Return request timeout in milliseconds.
getIOThreads()Return I/O thread count.
getSessionTimeoutSec()Return session timeout in seconds.
isBenchMode()Return whether benchmark mode is enabled.

Logging APIs ​

APIPurpose
getLogAsync()Return whether async logging is enabled.
getLogQueueMax()Return async log queue max size.
getLogDropOnOverflow()Return whether logs can be dropped on overflow.

WAF APIs ​

APIPurpose
getWafMode()Return WAF mode.
getWafMaxTargetLen()Return max target length.
getWafMaxBodyBytes()Return max body bytes for WAF checks.

TLS APIs ​

APIPurpose
isTlsEnabled()Return whether TLS is enabled.
getTlsCertFile()Return TLS certificate path.
getTlsKeyFile()Return TLS private key path.
getTlsConfig()Return complete TLS configuration.

Database APIs ​

APIPurpose
getDbHost()Return database host.
getDbUser()Return database user.
getDbName()Return database name.
getDbPort()Return database port.
getDbPasswordFromEnv()Return database password from environment.

Example:

cpp
vix::config::Config cfg;

cfg.setServerPort(8080);
cfg.set("server.tls.enabled", false);

vix::App app;
app.run(cfg);

RuntimeExecutor ​

Header:

cpp
#include <vix/executor/RuntimeExecutor.hpp>

RuntimeExecutor bridges Core to vix::runtime.

Construction ​

cpp
vix::executor::RuntimeExecutor executor{4};

Use with app:

cpp
auto executor = std::make_shared<vix::executor::RuntimeExecutor>(4);

vix::App app{executor};

Lifecycle ​

APIPurpose
start()Start the underlying runtime.
stop()Stop the runtime.
stop_and_wait()Drain current work, then stop.
started()Return whether the executor has started.
running()Return whether the runtime is running.
accepting()Return whether new work is accepted.

Submission ​

APIPurpose
submit(task)Submit a runtime task.
submit(task_fn, affinity)Submit a low-level task function.
post(fn, options)Submit a normal callable.
post_http_fast(fn, affinity)Submit short HTTP fast-path work.

Example:

cpp
executor.post([]()
{
  vix::print("work");
});

Direct runtime task:

cpp
executor.submit([]() -> vix::runtime::TaskResult
{
  return vix::runtime::TaskResult::complete;
});

Metrics ​

APIPurpose
metrics()Return executor metrics.
wait_idle()Wait until pending and active work reach zero.
submitted_tasks()Return accepted submission count.
rejected_tasks()Return rejected submission count.
fast_http_submitted_tasks()Return fast HTTP submission count.

Example:

cpp
const auto m = app.executor().metrics();

res.json({
  "pending", m.pending,
  "active", m.active,
  "timed_out", m.timed_out
});

TaskOptions ​

Header:

cpp
#include <vix/executor/TaskOptions.hpp>
cpp
struct TaskOptions
{
  int priority = 0;
  std::chrono::milliseconds timeout{0};
  std::chrono::milliseconds deadline{0};
  bool may_block = false;
};
FieldPurpose
priorityPriority value reserved for scheduling policy.
timeoutTimeout threshold for metrics.
deadlineDeadline value reserved for scheduling policy.
may_blockMarks whether the task may block.

Example:

cpp
vix::executor::TaskOptions options;

options.timeout = std::chrono::milliseconds(100);

app.executor().post([]()
{
  vix::print("work");
}, options);

Metrics ​

Header:

cpp
#include <vix/executor/Metrics.hpp>
cpp
struct Metrics
{
  std::uint64_t pending{0};
  std::uint64_t active{0};
  std::uint64_t timed_out{0};
};
FieldPurpose
pendingNumber of pending tasks.
activeNumber of active tracked tasks.
timed_outNumber of tasks that exceeded timeout threshold.

Complete example ​

cpp
#include <vix.hpp>

int main()
{
  vix::App app;

  app.use([](vix::Request &req, vix::Response &res, vix::App::Next next)
  {
    (void)res;

    vix::print(req.method(), req.path());

    next();
  });

  app.get("/", [](vix::Request &req, vix::Response &res)
  {
    (void)req;

    res.text("Home");
  });

  app.get("/users/{id}", [](vix::Request &req, vix::Response &res)
  {
    res.json({
      "id", req.param("id"),
      "page", req.query_value("page", "1")
    });
  });

  app.get("/metrics", [&app](vix::Request &req, vix::Response &res)
  {
    (void)req;

    const auto m = app.executor().metrics();

    res.json({
      "pending", m.pending,
      "active", m.active,
      "timed_out", m.timed_out
    });
  });

  app.static_dir("public/assets", "/assets");

  app.run(8080);

  return 0;
}

Header map ​

AreaHeader
Umbrella<vix.hpp>
Core umbrella<vix/core.hpp>
App<vix/app/App.hpp>
Router<vix/router/Router.hpp>
Route docs<vix/router/RouteDoc.hpp>
Route node<vix/router/RouteNode.hpp>
Route options<vix/router/RouteOptions.hpp>
Request<vix/http/Request.hpp>
Request state<vix/http/RequestState.hpp>
Response<vix/http/Response.hpp>
Response wrapper<vix/http/ResponseWrapper.hpp>
Status<vix/http/Status.hpp>
Request handler interface<vix/http/IRequestHandler.hpp>
Request handler adapter<vix/http/RequestHandler.hpp>
HTTP server<vix/server/HTTPServer.hpp>
TLS config<vix/server/TlsConfig.hpp>
Session<vix/session/Session.hpp>
Transport<vix/session/Transport.hpp>
Plain transport<vix/session/PlainTransport.hpp>
TLS session<vix/session/TlsSession.hpp>
TLS transport<vix/session/TlsTransport.hpp>
Config<vix/config/Config.hpp>
Runtime executor<vix/executor/RuntimeExecutor.hpp>
Task options<vix/executor/TaskOptions.hpp>
Metrics<vix/executor/Metrics.hpp>

For normal applications, use:

cpp
#include <vix.hpp>

Then write:

cpp
vix::App app;

app.get("/", [](vix::Request &req, vix::Response &res)
{
  (void)req;

  res.text("Hello from Vix");
});

app.run(8080);

Use direct headers only when you are writing advanced integrations, tests, module-level code, or documentation.

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