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server.go
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server.go
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package web
import (
"context"
"fmt"
"net/http"
"os/exec"
"strings"
"time"
"github.com/CHTJonas/go-lg/assets"
"github.com/CHTJonas/go-lg/internal/storage"
"github.com/cbroglie/mustache"
"github.com/gorilla/mux"
"go.uber.org/ratelimit"
)
type Server struct {
r *mux.Router
s *storage.Store
srv *http.Server
version string
rl ratelimit.Limiter
}
func NewServer(store *storage.Store, version string) *Server {
s := &Server{
s: store,
version: version,
rl: ratelimit.New(5),
}
r := mux.NewRouter().StrictSlash(true)
r.PathPrefix("/static/").Handler(assets.Server())
r.HandleFunc("/", s.getHomePage)
r.HandleFunc("/ping", s.getPingForm)
r.HandleFunc("/ping/action", s.submitPingForm)
r.HandleFunc("/ping/{uid}", s.getPingResults)
r.HandleFunc("/traceroute", s.getTracerouteForm)
r.HandleFunc("/traceroute/action", s.submitTracerouteForm)
r.HandleFunc("/traceroute/{uid}", s.getTracerouteResults)
r.HandleFunc("/whois", s.getWHOISForm)
r.HandleFunc("/whois/action", s.submitWHOISForm)
r.HandleFunc("/whois/{uid}", s.getWHOISResults)
r.HandleFunc("/host", s.getHostForm)
r.HandleFunc("/host/action", s.submitHostForm)
r.HandleFunc("/host/{uid}", s.getHostResults)
r.HandleFunc("/dig", s.getDigForm)
r.HandleFunc("/dig/action", s.submitDigForm)
r.HandleFunc("/dig/{uid}", s.getDigResults)
r.HandleFunc("/robots.txt", s.getRobotsTXT)
r.Use(s.loggingMiddleware)
r.Use(serverHeaderMiddleware)
r.Use(proxyMiddleware)
r.Use(s.rateLimitingMiddleware)
s.r = r
return s
}
func (serv *Server) Start(addr string) error {
serv.srv = &http.Server{
Addr: addr,
Handler: serv.r,
WriteTimeout: time.Second * 60,
ReadTimeout: time.Second * 60,
IdleTimeout: time.Second * 90,
}
return serv.srv.ListenAndServe()
}
func (serv *Server) Stop(ctx context.Context) error {
serv.srv.SetKeepAlivesEnabled(false)
return serv.srv.Shutdown(ctx)
}
func (serv *Server) getHomePage(w http.ResponseWriter, r *http.Request) {
partial, _ := assets.ReadFile("home.html.mustache")
layout, _ := assets.ReadFile("layout.html.mustache")
context := map[string]string{"title": "Home Page", "version": serv.version}
str, _ := mustache.RenderInLayout(string(partial), string(layout), context)
fmt.Fprint(w, str)
}
func (serv *Server) getPingForm(w http.ResponseWriter, r *http.Request) {
partial, _ := assets.ReadFile("form.html.mustache")
layout, _ := assets.ReadFile("layout.html.mustache")
context := map[string]string{"title": "Ping Report", "submissionURL": "/ping/action", "placeholder": "Hostname or IP", "checkboxes": "yes"}
str, _ := mustache.RenderInLayout(string(partial), string(layout), context)
fmt.Fprint(w, str)
}
func (serv *Server) submitPingForm(w http.ResponseWriter, r *http.Request) {
target := r.URL.Query().Get("target")
protocolVersion := r.URL.Query().Get("protocolVersion")
var cmd *exec.Cmd
if protocolVersion == "4" {
cmd = exec.Command("ping", "-4", "-c", "4", target)
} else if protocolVersion == "6" {
cmd = exec.Command("ping", "-6", "-c", "4", target)
} else {
cmd = exec.Command("ping", "-c", "4", target)
}
stdout, _ := cmd.Output()
uid, _ := serv.s.TrimWrite("ping", stdout)
redirect("ping", uid, w, r)
}
func (serv *Server) getPingResults(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
stdout := serv.s.Read("ping", vars["uid"])
if len(stdout) == 0 {
stdout = []byte("HTTP 404 Report Not Found")
w.WriteHeader(http.StatusNotFound)
}
partial, _ := assets.ReadFile("form.html.mustache")
layout, _ := assets.ReadFile("layout.html.mustache")
context := map[string]string{"title": "Ping Report", "code": string(stdout), "submissionURL": "/ping/action", "placeholder": "Hostname or IP", "checkboxes": "yes"}
str, _ := mustache.RenderInLayout(string(partial), string(layout), context)
fmt.Fprint(w, str)
}
func (serv *Server) getTracerouteForm(w http.ResponseWriter, r *http.Request) {
partial, _ := assets.ReadFile("form.html.mustache")
layout, _ := assets.ReadFile("layout.html.mustache")
context := map[string]string{"title": "Traceroute Report", "submissionURL": "/traceroute/action", "placeholder": "Hostname or IP", "checkboxes": "yes"}
str, _ := mustache.RenderInLayout(string(partial), string(layout), context)
fmt.Fprint(w, str)
}
func (serv *Server) submitTracerouteForm(w http.ResponseWriter, r *http.Request) {
target := r.URL.Query().Get("target")
protocolVersion := r.URL.Query().Get("protocolVersion")
var cmd *exec.Cmd
if protocolVersion == "4" {
cmd = exec.Command("mtr", "-4", "-c", "4", "-bez", "-w", target)
} else if protocolVersion == "6" {
cmd = exec.Command("mtr", "-6", "-c", "4", "-bez", "-w", target)
} else {
cmd = exec.Command("mtr", "-c", "4", "-bez", "-w", target)
}
stdout, _ := cmd.Output()
uid, _ := serv.s.TrimWrite("traceroute", stdout)
redirect("traceroute", uid, w, r)
}
func (serv *Server) getTracerouteResults(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
stdout := serv.s.Read("traceroute", vars["uid"])
if len(stdout) == 0 {
stdout = []byte("HTTP 404 Report Not Found")
w.WriteHeader(http.StatusNotFound)
}
partial, _ := assets.ReadFile("form.html.mustache")
layout, _ := assets.ReadFile("layout.html.mustache")
context := map[string]string{"title": "Traceroute Report", "code": string(stdout), "submissionURL": "/traceroute/action", "placeholder": "Hostname or IP", "checkboxes": "yes"}
str, _ := mustache.RenderInLayout(string(partial), string(layout), context)
fmt.Fprint(w, str)
}
func (serv *Server) getWHOISForm(w http.ResponseWriter, r *http.Request) {
partial, _ := assets.ReadFile("form.html.mustache")
layout, _ := assets.ReadFile("layout.html.mustache")
context := map[string]string{"title": "WHOIS Report", "submissionURL": "/whois/action", "placeholder": "Query"}
str, _ := mustache.RenderInLayout(string(partial), string(layout), context)
fmt.Fprint(w, str)
}
func (serv *Server) submitWHOISForm(w http.ResponseWriter, r *http.Request) {
target := r.URL.Query().Get("target")
cmd := exec.Command("whois", target)
stdout, _ := cmd.Output()
uid, _ := serv.s.TrimWrite("whois", stdout)
redirect("whois", uid, w, r)
}
func (serv *Server) getWHOISResults(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
stdout := serv.s.Read("whois", vars["uid"])
if len(stdout) == 0 {
stdout = []byte("HTTP 404 Report Not Found")
w.WriteHeader(http.StatusNotFound)
}
partial, _ := assets.ReadFile("form.html.mustache")
layout, _ := assets.ReadFile("layout.html.mustache")
context := map[string]string{"title": "WHOIS Report", "code": string(stdout), "submissionURL": "/whois/action", "placeholder": "Query"}
str, _ := mustache.RenderInLayout(string(partial), string(layout), context)
fmt.Fprint(w, str)
}
func (serv *Server) getHostForm(w http.ResponseWriter, r *http.Request) {
partial, _ := assets.ReadFile("form.html.mustache")
layout, _ := assets.ReadFile("layout.html.mustache")
context := map[string]string{"title": "Host Report", "submissionURL": "/host/action", "placeholder": "Hostname or IP"}
str, _ := mustache.RenderInLayout(string(partial), string(layout), context)
fmt.Fprint(w, str)
}
func (serv *Server) submitHostForm(w http.ResponseWriter, r *http.Request) {
target := r.URL.Query().Get("target")
cmd := exec.Command("host", strings.Split(target, " ")...)
stdout, _ := cmd.Output()
uid, _ := serv.s.TrimWrite("host", stdout)
redirect("host", uid, w, r)
}
func (serv *Server) getHostResults(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
stdout := serv.s.Read("host", vars["uid"])
if len(stdout) == 0 {
stdout = []byte("HTTP 404 Report Not Found")
w.WriteHeader(http.StatusNotFound)
}
partial, _ := assets.ReadFile("form.html.mustache")
layout, _ := assets.ReadFile("layout.html.mustache")
context := map[string]string{"title": "Host Report", "code": string(stdout), "submissionURL": "/host/action", "placeholder": "Hostname or IP"}
str, _ := mustache.RenderInLayout(string(partial), string(layout), context)
fmt.Fprint(w, str)
}
func (serv *Server) getDigForm(w http.ResponseWriter, r *http.Request) {
partial, _ := assets.ReadFile("form.html.mustache")
layout, _ := assets.ReadFile("layout.html.mustache")
context := map[string]string{"title": "DIG Report", "submissionURL": "/dig/action", "placeholder": "Query"}
str, _ := mustache.RenderInLayout(string(partial), string(layout), context)
fmt.Fprint(w, str)
}
func (serv *Server) submitDigForm(w http.ResponseWriter, r *http.Request) {
target := r.URL.Query().Get("target")
cmd := exec.Command("dig", strings.Split(target, " ")...)
stdout, _ := cmd.Output()
uid, _ := serv.s.TrimWrite("dig", stdout)
redirect("dig", uid, w, r)
}
func (serv *Server) getDigResults(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
stdout := serv.s.Read("dig", vars["uid"])
if len(stdout) == 0 {
stdout = []byte("HTTP 404 Report Not Found")
w.WriteHeader(http.StatusNotFound)
}
partial, _ := assets.ReadFile("form.html.mustache")
layout, _ := assets.ReadFile("layout.html.mustache")
context := map[string]string{"title": "DIG Report", "code": string(stdout), "submissionURL": "/dig/action", "placeholder": "Query"}
str, _ := mustache.RenderInLayout(string(partial), string(layout), context)
fmt.Fprint(w, str)
}
func (serv *Server) getRobotsTXT(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, "User-agent: *")
fmt.Fprintln(w, "Disallow: /ping/*")
fmt.Fprintln(w, "Disallow: /traceroute/*")
fmt.Fprintln(w, "Disallow: /whois/*")
fmt.Fprintln(w, "Disallow: /host/*")
fmt.Fprintln(w, "Disallow: /dig/*")
}
func redirect(base string, uid string, w http.ResponseWriter, r *http.Request) {
http.Redirect(w, r, "/"+base+"/"+uid, http.StatusTemporaryRedirect)
}