add json api test server #14
14
README.md
14
README.md
@ -75,6 +75,20 @@ Requests/sec: 50056.01
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Transfer/sec: 34.23MB
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```
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### oDinZu Drogon HTTP Server GET/JSON REQ with 2 IO threads
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```
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wrk -c200 -d5 -t4 http://localhost:8848/3a322920d42ef0763152a6efff2ed51985530aedd45370f92fd0f0b8dcc30220
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Running 5s test @ http://localhost:8848/3a322920d42ef0763152a6efff2ed51985530aedd45370f92fd0f0b8dcc30220
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4 threads and 200 connections
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Thread Stats Avg Stdev Max +/- Stdev
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Latency 7.54ms 23.66ms 413.86ms 98.15%
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Req/Sec 10.37k 0.90k 13.36k 87.00%
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206443 requests in 5.00s, 141.16MB read
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Non-2xx or 3xx responses: 206443
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Requests/sec: 41253.06
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Transfer/sec: 28.21MB
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```
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## Development & Contributing
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### Developer Dependency Requirements
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255
vendors/drogon/local-api-server/main.cc
vendored
255
vendors/drogon/local-api-server/main.cc
vendored
@ -1,71 +1,212 @@
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#include <drogon/WebSocketController.h>
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#include <drogon/PubSubService.h>
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#include <drogon/HttpAppFramework.h>
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#include <drogon/drogon.h>
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using namespace drogon;
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class WebSocketChat : public drogon::WebSocketController<WebSocketChat>
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HttpResponsePtr makeFailedResponse()
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{
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Json::Value json;
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json["ok"] = false;
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auto resp = HttpResponse::newHttpJsonResponse(json);
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resp->setStatusCode(k500InternalServerError);
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return resp;
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}
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HttpResponsePtr makeSuccessResponse()
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{
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Json::Value json;
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json["ok"] = true;
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auto resp = HttpResponse::newHttpJsonResponse(json);
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return resp;
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}
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std::string getRandomString(size_t n)
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{
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std::vector<unsigned char> random(n);
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utils::secureRandomBytes(random.data(), random.size());
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// This is cryptographically safe as 256 mod 16 == 0
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static const std::string alphabets = "0123456789abcdef";
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assert(256 % alphabets.size() == 0);
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std::string randomString(n, '\0');
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for (size_t i = 0; i < n; i++)
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randomString[i] = alphabets[random[i] % alphabets.size()];
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return randomString;
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}
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struct DataItem
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{
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Json::Value item;
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std::mutex mtx;
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};
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class JsonStore : public HttpController<JsonStore>
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{
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public:
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virtual void handleNewMessage(const WebSocketConnectionPtr &,
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std::string &&,
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const WebSocketMessageType &) override;
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virtual void handleConnectionClosed(
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const WebSocketConnectionPtr &) override;
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virtual void handleNewConnection(const HttpRequestPtr &,
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const WebSocketConnectionPtr &) override;
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WS_PATH_LIST_BEGIN
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WS_PATH_ADD("/chat", Get);
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WS_PATH_LIST_END
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private:
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PubSubService<std::string> chatRooms_;
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};
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METHOD_LIST_BEGIN
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ADD_METHOD_TO(JsonStore::getToken, "/get-token", Get);
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ADD_METHOD_VIA_REGEX(JsonStore::getItem, "/([a-f0-9]{64})/(.*)", Get);
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ADD_METHOD_VIA_REGEX(JsonStore::createItem, "/([a-f0-9]{64})", Post);
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ADD_METHOD_VIA_REGEX(JsonStore::deleteItem, "/([a-f0-9]{64})", Delete);
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ADD_METHOD_VIA_REGEX(JsonStore::updateItem, "/([a-f0-9]{64})/(.*)", Put);
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METHOD_LIST_END
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struct Subscriber
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{
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std::string chatRoomName_;
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drogon::SubscriberID id_;
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};
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void WebSocketChat::handleNewMessage(const WebSocketConnectionPtr &wsConnPtr,
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std::string &&message,
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const WebSocketMessageType &type)
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{
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// write your application logic here
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LOG_DEBUG << "new websocket message:" << message;
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if (type == WebSocketMessageType::Ping)
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void getToken(const HttpRequestPtr &,
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std::function<void(const HttpResponsePtr &)> &&callback)
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{
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LOG_DEBUG << "recv a ping";
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std::string randomString = getRandomString(64);
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Json::Value res;
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res["token"] = randomString;
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callback(HttpResponse::newHttpJsonResponse(std::move(res)));
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}
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else if (type == WebSocketMessageType::Text)
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void getItem(const HttpRequestPtr &,
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std::function<void(const HttpResponsePtr &)> &&callback,
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const std::string &token,
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const std::string &path)
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{
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auto &s = wsConnPtr->getContextRef<Subscriber>();
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chatRooms_.publish(s.chatRoomName_, message);
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auto itemPtr = [this, &token]() -> std::shared_ptr<DataItem> {
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// It is possible that the item is being removed while another
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// thread tries to look it up. The mutex here prevents that from
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// happening.
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std::lock_guard<std::mutex> lock(storageMtx_);
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auto it = dataStore_.find(token);
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if (it == dataStore_.end())
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return nullptr;
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return it->second;
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}();
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if (itemPtr == nullptr)
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{
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callback(makeFailedResponse());
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return;
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}
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auto &item = *itemPtr;
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// Prevents another thread from writing to the same item while this
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// thread reads. Could cause blockage if multiple clients are asking to
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// read the same object. But that should be rare.
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std::lock_guard<std::mutex> lock(item.mtx);
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Json::Value *valuePtr = walkJson(item.item, path);
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if (valuePtr == nullptr)
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{
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callback(makeFailedResponse());
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return;
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}
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auto resp = HttpResponse::newHttpJsonResponse(*valuePtr);
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callback(resp);
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}
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}
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void WebSocketChat::handleConnectionClosed(const WebSocketConnectionPtr &conn)
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{
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LOG_DEBUG << "websocket closed!";
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auto &s = conn->getContextRef<Subscriber>();
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chatRooms_.unsubscribe(s.chatRoomName_, s.id_);
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}
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void updateItem(const HttpRequestPtr &req,
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std::function<void(const HttpResponsePtr &)> &&callback,
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const std::string &token,
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const std::string &path)
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{
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auto jsonPtr = req->jsonObject();
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auto itemPtr = [this, &token]() -> std::shared_ptr<DataItem> {
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// It is possible that the item is being removed while another
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// thread tries to look it up. The mutex here prevents that from
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// happening.
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std::lock_guard<std::mutex> lock(storageMtx_);
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auto it = dataStore_.find(token);
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if (it == dataStore_.end())
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return nullptr;
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return it->second;
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}();
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void WebSocketChat::handleNewConnection(const HttpRequestPtr &req,
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const WebSocketConnectionPtr &conn)
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{
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LOG_DEBUG << "new websocket connection!";
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conn->send("haha!!!");
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Subscriber s;
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s.chatRoomName_ = req->getParameter("room_name");
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s.id_ = chatRooms_.subscribe(s.chatRoomName_,
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[conn](const std::string &topic,
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const std::string &message) {
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// Suppress unused variable warning
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(void)topic;
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conn->send(message);
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});
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conn->setContext(std::make_shared<Subscriber>(std::move(s)));
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}
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if (itemPtr == nullptr || jsonPtr == nullptr)
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{
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callback(makeFailedResponse());
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return;
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}
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auto &item = *itemPtr;
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std::lock_guard<std::mutex> lock(item.mtx);
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Json::Value *valuePtr = walkJson(item.item, path, 1);
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if (valuePtr == nullptr)
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{
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callback(makeFailedResponse());
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return;
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}
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std::string key = utils::splitString(path, "/").back();
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(*valuePtr)[key] = *jsonPtr;
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callback(makeSuccessResponse());
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}
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void createItem(const HttpRequestPtr &req,
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std::function<void(const HttpResponsePtr &)> &&callback,
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const std::string &token)
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{
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auto jsonPtr = req->jsonObject();
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if (jsonPtr == nullptr)
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{
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callback(makeFailedResponse());
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return;
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}
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std::lock_guard<std::mutex> lock(storageMtx_);
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if (dataStore_.find(token) == dataStore_.end())
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{
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auto item = std::make_shared<DataItem>();
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item->item = std::move(*jsonPtr);
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dataStore_.insert({token, std::move(item)});
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callback(makeSuccessResponse());
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}
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else
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{
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callback(makeFailedResponse());
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}
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}
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void deleteItem(const HttpRequestPtr &,
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std::function<void(const HttpResponsePtr &)> &&callback,
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const std::string &token)
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{
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std::lock_guard<std::mutex> lock(storageMtx_);
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dataStore_.erase(token);
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callback(makeSuccessResponse());
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}
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protected:
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static Json::Value *walkJson(Json::Value &json,
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const std::string &path,
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size_t ignore_back = 0)
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{
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auto pathElem = utils::splitString(path, "/", false);
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if (pathElem.size() >= ignore_back)
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pathElem.resize(pathElem.size() - ignore_back);
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Json::Value *valuePtr = &json;
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for (const auto &elem : pathElem)
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{
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if (valuePtr->isArray())
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{
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Json::Value &value = (*valuePtr)[std::stoi(elem)];
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if (value.isNull())
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return nullptr;
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valuePtr = &value;
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}
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else
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{
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Json::Value &value = (*valuePtr)[elem];
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if (value.isNull())
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return nullptr;
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valuePtr = &value;
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}
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}
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return valuePtr;
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}
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std::unordered_map<std::string, std::shared_ptr<DataItem>> dataStore_;
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std::mutex storageMtx_;
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};
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int main()
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{
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Block a user