mirror of
https://github.com/ethereum/go-ethereum.git
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9822d7405e
* Conceals rw in messenger type * Adds generic remote control for nodes in network sim * Adds msg type and event to sim, journal * Msg http output, http options handler * Msg event added to "cytoscape" for output to visualizer * Msg event structure changed to fit "cytodata" logic * Fix for handling CORS/PUT requests: * fallthrough OPTIONS method handler * Access-Control-Allow-Methods header added (note that the servermux panics if sent empty method value through http)
67 lines
1.9 KiB
Go
67 lines
1.9 KiB
Go
package simulations
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import (
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"fmt"
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"net"
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"net/http"
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"strings"
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"time"
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"github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/logger/glog"
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)
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type Controller interface {
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Resource(id string) (Controller, error)
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Handle(method string) (returnHandler, error)
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SetResource(id string, c Controller)
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}
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// starts up http server
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func StartRestApiServer(port string, c Controller) {
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serveMux := http.NewServeMux()
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serveMux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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handle(w, r, c)
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})
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fd, err := net.Listen("tcp", ":"+port)
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if err != nil {
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glog.Errorf("Can't listen on :%s: %v", port, err)
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return
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}
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go http.Serve(fd, serveMux)
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glog.V(logger.Info).Infof("Swarm Network Controller HTTP server started on localhost:%s", port)
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}
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func handle(w http.ResponseWriter, r *http.Request, c Controller) {
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requestURL := r.URL
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glog.V(logger.Debug).Infof("HTTP %s request URL: '%s', Host: '%s', Path: '%s', Referer: '%s', Accept: '%s'", r.Method, r.RequestURI, requestURL.Host, requestURL.Path, r.Referer(), r.Header.Get("Accept"))
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uri := requestURL.Path
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w.Header().Set("Content-Type", "text/json")
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w.Header().Set("Access-Control-Allow-Origin", "*")
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w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
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defer r.Body.Close()
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parts := strings.Split(uri, "/")
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var err error
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for _, id := range parts {
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if len(id) == 0 {
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continue
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}
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c, err = c.Resource(id)
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if err != nil {
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http.Error(w, fmt.Sprintf("resource %v not found", id), http.StatusNotFound)
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return
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}
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}
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handler, err := c.Handle(r.Method)
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if err != nil {
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http.Error(w, fmt.Sprintf("method %v not allowed (%v)", r.Method, err), http.StatusMethodNotAllowed)
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return
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}
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// on return we close the request Body so we assume it is read synchronously
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response, err := handler(r.Body)
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if err != nil {
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http.Error(w, fmt.Sprintf("handler error: %v", err), http.StatusBadRequest)
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return
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}
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http.ServeContent(w, r, "", time.Now(), response)
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}
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