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server.go
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server.go
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package main
import (
"bytes"
"crypto/tls"
b64 "encoding/base64"
"fmt"
"github.com/elazarl/go-bindata-assetfs"
"github.com/kabukky/httpscerts"
"io/ioutil"
"log"
"net/http"
"time"
)
type PostStruct struct {
Buffer string
}
func serve(certificate, key, hostname string, port int) {
virtual_fs := &assetfs.AssetFS{
Asset: Asset,
AssetDir: AssetDir,
AssetInfo: AssetInfo}
//set up custom mux
mux := http.NewServeMux()
mux.Handle("/static/", http.FileServer(virtual_fs))
mux.HandleFunc("/timeline/compose", guiHandler)
mux.HandleFunc("/timeline", handler)
err := httpscerts.Check(certificate, key)
if err != nil {
cert, key, err := httpscerts.GenerateArrays(fmt.Sprintf("%s:%d", hostname, port))
if err != nil {
log.Fatal("Can't create https certs")
}
keyPair, err := tls.X509KeyPair(cert, key)
if err != nil {
log.Fatal("Can't create key pair")
}
var certificates []tls.Certificate
certificates = append(certificates, keyPair)
cfg := &tls.Config{
MinVersion: tls.VersionTLS12,
PreferServerCipherSuites: true,
Certificates: certificates,
}
s := &http.Server{
Addr: fmt.Sprintf("%s:%d", hostname, port),
Handler: mux,
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
MaxHeaderBytes: 1 << 20,
TLSConfig: cfg,
}
fmt.Print(listening(hostname, port, true))
log.Fatal(s.ListenAndServeTLS("", ""))
}
fmt.Print(listening(hostname, port, false))
log.Fatal(http.ListenAndServeTLS(fmt.Sprintf("%s:%d", hostname, port), certificate, key, mux))
}
func listening(hostname string, port int, selfCert bool) string {
var selfCertMsg string
if selfCert {
selfCertMsg = " (self-certified)"
}
return fmt.Sprintf("Listening on port %d%s\n"+
"POST JSON sources to https://%s:%d/timeline\n"+
"Generate report at https://%s:%d/timeline/compose\n", port, selfCertMsg, hostname, port, hostname, port)
}
/*
func serve(certificate, key, hostname string, port int) {
virtual_fs := &assetfs.AssetFS{
Asset: Asset,
AssetDir: AssetDir,
AssetInfo: AssetInfo}
err := httpscerts.Check(certificate, key)
if err != nil {
err = httpscerts.Generate(certificate, key, fmt.Sprintf("%s:%d", hostname, port))
if err != nil {
log.Fatal("Can't create https certs")
}
fmt.Printf("Created %s and %s\n", certificate, key)
}
http.Handle("/static/", http.FileServer(virtual_fs))
http.HandleFunc("/timeline/compose", guiHandler)
http.HandleFunc("/timeline", handler)
fmt.Printf("Listening on port %d\n"+
"POST JSON sources to https://%s:%d/timeline\n"+
"Compose timelines at https://%s:%d/timeline/compose\n", port, hostname, port, hostname, port)
log.Fatal(http.ListenAndServeTLS(fmt.Sprintf("%s:%d", hostname, port), certificate, key, nil))
}
*/
func guiHandler(w http.ResponseWriter, r *http.Request) {
bytes, _ := Asset("static/index.html")
fmt.Fprintf(w, "%s\n", string(bytes))
}
func handler(w http.ResponseWriter, r *http.Request) {
switch r.Method {
case "POST":
handlePost(&w, r)
case "GET":
handleGet(&w, r)
}
}
func handleGet(w *http.ResponseWriter, r *http.Request) {
fmt.Fprintf(*w, "GET request\nRequest struct = %v\n", r)
}
func handlePost(w *http.ResponseWriter, r *http.Request) {
body, err := ioutil.ReadAll(r.Body)
if err != nil {
fmt.Fprintf(*w, "Can't read POST request body: %s\n", err)
return
}
result := processBytes(body)
if result.Code > 0 {
fmt.Fprintf(*w, "<p>%s</p>", result.Message)
return
}
//now display using base64 data
buf := new(bytes.Buffer)
err = result.Context.EncodePNG(buf)
if err != nil {
fmt.Fprintf(*w, "<p>Can't encode resulting image: %v</p>", err)
return
}
//TBD: option to return bytestream
s := b64.StdEncoding.EncodeToString(buf.Bytes())
fmt.Fprintf(*w, "<img class=\"img-responsive\" alt=\"Timeline\" src=\"data:image/png;base64,%s\"/>", s)
}