gosora/routes.go

291 lines
8.1 KiB
Go

/*
*
* Gosora Route Handlers
* Copyright Azareal 2016 - 2020
*
*/
package main
import (
"crypto/sha256"
"encoding/hex"
"encoding/json"
"errors"
"log"
"net/http"
"strconv"
"strings"
"unicode"
c "github.com/Azareal/Gosora/common"
"github.com/Azareal/Gosora/common/phrases"
)
// A blank list to fill out that parameter in Page for routes which don't use it
var tList []interface{}
var successJSONBytes = []byte(`{"success":"1"}`)
// TODO: Refactor this
// TODO: Use the phrase system
var phraseLoginAlerts = []byte(`{"msgs":[{"msg":"Login to see your alerts","path":"/accounts/login"}],"msgCount":0}`)
// TODO: Refactor this endpoint
// TODO: Move this into the routes package
func routeAPI(w http.ResponseWriter, r *http.Request, user c.User) c.RouteError {
// TODO: Don't make this too JSON dependent so that we can swap in newer more efficient formats
w.Header().Set("Content-Type", "application/json")
err := r.ParseForm()
if err != nil {
return c.PreErrorJS("Bad Form", w, r)
}
action := r.FormValue("action")
if action != "get" && action != "set" {
return c.PreErrorJS("Invalid Action", w, r)
}
switch r.FormValue("module") {
// TODO: Split this into it's own function
case "dismiss-alert":
asid, err := strconv.Atoi(r.FormValue("asid"))
if err != nil {
return c.PreErrorJS("Invalid asid", w, r)
}
res, err := stmts.deleteActivityStreamMatch.Exec(user.ID, asid)
if err != nil {
return c.InternalError(err, w, r)
}
count, err := res.RowsAffected()
if err != nil {
return c.InternalError(err, w, r)
}
// Don't want to throw an internal error due to a socket closing
if c.EnableWebsockets && count > 0 {
_ = c.WsHub.PushMessage(user.ID, `{"event":"dismiss-alert","asid":`+strconv.Itoa(asid)+`}`)
}
w.Write(successJSONBytes)
// TODO: Split this into it's own function
case "alerts": // A feed of events tailored for a specific user
if !user.Loggedin {
w.Write(phraseLoginAlerts)
return nil
}
var msglist string
var msgCount int
err = stmts.getActivityCountByWatcher.QueryRow(user.ID).Scan(&msgCount)
if err == ErrNoRows {
return c.PreErrorJS("Couldn't find the parent topic", w, r)
} else if err != nil {
return c.InternalErrorJS(err, w, r)
}
rows, err := stmts.getActivityFeedByWatcher.Query(user.ID)
if err != nil {
return c.InternalErrorJS(err, w, r)
}
defer rows.Close()
var actors []int
var alerts []c.Alert
for rows.Next() {
var alert c.Alert
err = rows.Scan(&alert.ASID, &alert.ActorID, &alert.TargetUserID, &alert.Event, &alert.ElementType, &alert.ElementID)
if err != nil {
return c.InternalErrorJS(err, w, r)
}
alerts = append(alerts, alert)
actors = append(actors, alert.ActorID)
}
err = rows.Err()
if err != nil {
return c.InternalErrorJS(err, w, r)
}
// Might not want to error here, if the account was deleted properly, we might want to figure out how we should handle deletions in general
list, err := c.Users.BulkGetMap(actors)
if err != nil {
log.Print("actors:", actors)
return c.InternalErrorJS(err, w, r)
}
var ok bool
for _, alert := range alerts {
alert.Actor, ok = list[alert.ActorID]
if !ok {
return c.InternalErrorJS(errors.New("No such actor"), w, r)
}
res, err := c.BuildAlert(alert, user)
if err != nil {
return c.LocalErrorJS(err.Error(), w, r)
}
msglist += res + ","
}
if len(msglist) != 0 {
msglist = msglist[0 : len(msglist)-1]
}
_, _ = w.Write([]byte(`{"msgs":[` + msglist + `],"msgCount":` + strconv.Itoa(msgCount) + `}`))
default:
return c.PreErrorJS("Invalid Module", w, r)
}
return nil
}
// TODO: Remove this line after we move routeAPIPhrases to the routes package
var cacheControlMaxAge = "max-age=" + strconv.Itoa(int(c.Day))
// TODO: Be careful with exposing the panel phrases here, maybe move them into a different namespace? We also need to educate the admin that phrases aren't necessarily secret
// TODO: Move to the routes package
var phraseWhitelist = []string{
"topic",
"status",
"alerts",
"paginator",
"analytics",
"panel", // We're going to handle this specially below as this is a security boundary
}
func routeAPIPhrases(w http.ResponseWriter, r *http.Request, user c.User) c.RouteError {
// TODO: Don't make this too JSON dependent so that we can swap in newer more efficient formats
h := w.Header()
h.Set("Content-Type", "application/json")
h.Set("Cache-Control", cacheControlMaxAge) //Cache-Control: max-age=31536000
err := r.ParseForm()
if err != nil {
return c.PreErrorJS("Bad Form", w, r)
}
query := r.FormValue("query")
if query == "" {
return c.PreErrorJS("No query provided", w, r)
}
var negations []string
var positives []string
queryBits := strings.Split(query, ",")
for _, queryBit := range queryBits {
queryBit = strings.TrimSpace(queryBit)
if queryBit[0] == '!' && len(queryBit) > 1 {
queryBit = strings.TrimPrefix(queryBit, "!")
for _, char := range queryBit {
if !unicode.IsLetter(char) && char != '-' && char != '_' {
return c.PreErrorJS("No symbols allowed, only - and _", w, r)
}
}
negations = append(negations, queryBit)
} else {
for _, char := range queryBit {
if !unicode.IsLetter(char) && char != '-' && char != '_' {
return c.PreErrorJS("No symbols allowed, only - and _", w, r)
}
}
positives = append(positives, queryBit)
}
}
if len(positives) == 0 {
return c.PreErrorJS("You haven't requested any phrases", w, r)
}
var etag string
_, ok := w.(c.GzipResponseWriter)
if ok {
etag = "\""+strconv.FormatInt(c.StartTime.Unix(), 10)+"-g\""
} else {
etag = "\""+strconv.FormatInt(c.StartTime.Unix(), 10)+"\""
}
var plist map[string]string
var posLoop = func(positive string) c.RouteError {
// ! Constrain it to a subset of phrases for now
for _, item := range phraseWhitelist {
if strings.HasPrefix(positive, item) {
// TODO: Break this down into smaller security boundaries based on control panel sections?
if strings.HasPrefix(positive,"panel") {
w.Header().Set("Cache-Control", "private")
ok = user.IsSuperMod
} else {
ok = true
w.Header().Set("ETag", etag)
if match := r.Header.Get("If-None-Match"); match != "" {
if strings.Contains(match, etag) {
w.WriteHeader(http.StatusNotModified)
return nil
}
}
}
break
}
}
if !ok {
return c.PreErrorJS("Outside of phrase prefix whitelist", w, r)
}
return nil
}
// A little optimisation to avoid copying entries from one map to the other, if we don't have to mutate it
if len(positives) > 1 {
plist = make(map[string]string)
for _, positive := range positives {
rerr := posLoop(positive)
if rerr != nil {
return rerr
}
pPhrases, ok := phrases.GetTmplPhrasesByPrefix(positive)
if !ok {
return c.PreErrorJS("No such prefix", w, r)
}
for name, phrase := range pPhrases {
plist[name] = phrase
}
}
} else {
rerr := posLoop(positives[0])
if rerr != nil {
return rerr
}
pPhrases, ok := phrases.GetTmplPhrasesByPrefix(positives[0])
if !ok {
return c.PreErrorJS("No such prefix", w, r)
}
plist = pPhrases
}
for _, negation := range negations {
for name, _ := range plist {
if strings.HasPrefix(name, negation) {
delete(plist, name)
}
}
}
// TODO: Cache the output of this, especially for things like topic, so we don't have to waste more time than we need on this
jsonBytes, err := json.Marshal(plist)
if err != nil {
return c.InternalError(err, w, r)
}
w.Write(jsonBytes)
return nil
}
// A dedicated function so we can shake things up every now and then to make the token harder to parse
// TODO: Are we sure we want to do this by ID, just in case we reuse this and have multiple antispams on the page?
func routeJSAntispam(w http.ResponseWriter, r *http.Request, user c.User) c.RouteError {
h := sha256.New()
h.Write([]byte(c.JSTokenBox.Load().(string)))
h.Write([]byte(user.LastIP))
jsToken := hex.EncodeToString(h.Sum(nil))
var innerCode = "`document.getElementByld('golden-watch').value = '" + jsToken + "';`"
w.Write([]byte(`let hihi = ` + innerCode + `;
hihi = hihi.replace('ld','Id');
eval(hihi);`))
return nil
}