swarm: codebase split from go-ethereum (#1405)

network/simulation/http.go

@@ -0,0 +1,68 @@
+// Copyright 2018 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package simulation
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/p2p/simulations"
+)
+
+// Package defaults.
+var (
+	DefaultHTTPSimAddr = ":8888"
+)
+
+//WithServer implements the builder pattern constructor for Simulation to
+//start with a HTTP server
+func (s *Simulation) WithServer(addr string) *Simulation {
+	//assign default addr if nothing provided
+	if addr == "" {
+		addr = DefaultHTTPSimAddr
+	}
+	log.Info(fmt.Sprintf("Initializing simulation server on %s...", addr))
+	//initialize the HTTP server
+	s.handler = simulations.NewServer(s.Net)
+	s.runC = make(chan struct{})
+	//add swarm specific routes to the HTTP server
+	s.addSimulationRoutes()
+	s.httpSrv = &http.Server{
+		Addr:    addr,
+		Handler: s.handler,
+	}
+	go func() {
+		err := s.httpSrv.ListenAndServe()
+		if err != nil {
+			log.Error("Error starting the HTTP server", "error", err)
+		}
+	}()
+	return s
+}
+
+//register additional HTTP routes
+func (s *Simulation) addSimulationRoutes() {
+	s.handler.POST("/runsim", s.RunSimulation)
+}
+
+// RunSimulation is the actual POST endpoint runner
+func (s *Simulation) RunSimulation(w http.ResponseWriter, req *http.Request) {
+	log.Debug("RunSimulation endpoint running")
+	s.runC <- struct{}{}
+	w.WriteHeader(http.StatusOK)
+}