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// cs/net/http/web_app.hh
#ifndef CS_NET_HTTP_WEB_APP_HH
#define CS_NET_HTTP_WEB_APP_HH
#include <chrono>
#include <functional>
#include <iomanip>
#include <iostream>
#include <memory>
#include <type_traits>
#include "cs/apps/trycopilot.ai/api/logs.hh"
#include "cs/apps/trycopilot.ai/protos/gencode/log.proto.hh"
#include "cs/log.hh"
#include "cs/net/http/request.hh"
#include "cs/net/http/response.hh"
#include "cs/net/http/server.hh"
#include "cs/result.hh"
#include "cs/util/di/context.gpt.hh"
namespace cs::net::http {
#define ADD_ROUTE(_app, _method, _path, _fn) \
OK_OR_RET( \
_app.Register(_method, _path, \
[](cs::net::http::Request r, \
decltype(_app)::context_type& c) { \
return _fn(r, c); \
}))
// Use for handlers that must capture (e.g. load endpoint).
#define ADD_ROUTE_CAPTURE(_app, _method, _path, _fn) \
OK_OR_RET(_app.Register(_method, _path, _fn))
template <typename ContextType = ::cs::util::di::Context<>>
class WebApp {
public:
using context_type = ContextType;
explicit WebApp(ContextType& ctx) : context_(&ctx) {}
// Default constructor when ContextType is Context<> (no
// local ctx needed).
template <typename T = ContextType>
explicit WebApp(
std::enable_if_t<
std::is_same_v<T, ::cs::util::di::Context<>>>* =
nullptr)
: context_(&DefaultEmptyContext()) {}
static ::cs::util::di::Context<>& DefaultEmptyContext() {
static ::cs::util::di::Context<> ctx;
return ctx;
}
float GetThreadLoad() const {
return server_ ? server_->GetThreadLoad() : 0.0f;
}
ContextType& ctx() { return *context_; }
const ContextType& ctx() const { return *context_; }
Result Register(std::string method, std::string pattern,
std::function<cs::net::http::Response(
cs::net::http::Request, ContextType&)>
handler) {
handlers_.push_back(
std::make_tuple(method, pattern, handler));
return Ok();
}
Result RunServer(std::string ip_address, int port) {
server_ = std::make_unique<cs::net::http::Server>(
ip_address, port);
OK_OR_RET(server_->Bind());
OK_OR_RET(server_->StartListening(
std::bind(&WebApp<ContextType>::main_handler, this,
std::placeholders::_1)));
return Ok();
}
// Return routes of (HTTP method, pattern)
std::vector<std::tuple<std::string, std::string>>
Routes() {
std::vector<std::tuple<std::string, std::string>>
routes;
for (auto path_info : handlers_) {
const auto [method, pattern, handler] = path_info;
routes.push_back(std::make_tuple(method, pattern));
}
return routes;
}
private:
bool PathMatches(std::string path, std::string pattern) {
if (pattern.size() == 0 || path.size() == 0) {
return false;
}
if (path == pattern) {
return true;
}
if (pattern[pattern.size() - 1] == '*') {
if (path.rfind(pattern.substr(0, pattern.size() - 1),
/*start=*/0) == 0) {
return true;
}
}
return false;
}
cs::net::http::Response main_handler(
cs::net::http::Request request) {
cs::net::http::Response response(HTTP_404_NOT_FOUND);
for (auto path_info : handlers_) {
const auto [method, pattern, handler] = path_info;
if (request.method() != method) {
continue;
}
if (!PathMatches(request.path(), pattern)) {
continue;
}
response = handler(request, ctx());
break;
}
#if 0
// Log http request and response.
// Skip logging database-service requests to prevent
// recursive JSON escaping
bool is_database_service_request =
request.path() == "/rpc/upsert/" ||
request.path() == "/rpc/query/";
// Disabled: http_logs and app_logs logging to prevent database-service requests
if (!is_database_service_request) {
LOG(DEBUG)
<< cs::apps::trycopilotai::api::CreateLogAPI().Process(
cs::apps::trycopilotai::protos::gencode::log::CreateLogRequestBuilderImpl()
.set_request(
cs::apps::trycopilotai::protos::gencode::
log::HttpRequestBuilderImpl()
.set_receive_timestamp(
cs::apps::trycopilotai::
protos::gencode::log::
TimestampBuilderImpl()
.set_iso8601(
cs::util::time::
NowAsISO8601TimeUTC())
.Build())
.set_method(request.method())
.set_path(request.path())
.set_content_type(
response._content_type)
.set_content_length(
response.body().size())
.set_body(request.body())
.Build())
.set_response(
cs::apps::trycopilotai::protos::gencode::
log::HttpResponseBuilderImpl()
.set_send_timestamp(
cs::apps::trycopilotai::
protos::gencode::log::
TimestampBuilderImpl()
.set_iso8601(
cs::util::time::
NowAsISO8601TimeUTC())
.Build())
.set_status(
cs::apps::trycopilotai::
protos::gencode::log::
HttpStatusBuilderImpl()
.set_code(
response
._status
.code)
.set_name(
response
._status
.name)
.Build())
.set_content_type(
response._content_type)
.set_content_length(
response.body().size())
.set_body(response.body())
.Build())
.set_result(
cs::apps::trycopilotai::protos::
gencode::log::ResultBuilderImpl()
.set_code(
response._result.code())
.set_message(response._result
.message())
.Build())
.Build())
<< ENDL;
}
#endif // #if 0
return response;
};
ContextType* context_;
std::vector<std::tuple<
std::string, std::string,
std::function<cs::net::http::Response(
cs::net::http::Request, ContextType&)>>>
handlers_;
std::unique_ptr<cs::net::http::Server> server_;
};
} // namespace cs::net::http
#endif // CS_NET_HTTP_WEB_APP_HH