// POSTVulnerabilities manually inserts a vulnerability into the database if it
// does not exist yet.
func POSTVulnerabilities(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
var parameters *database.AbstractVulnerability
if s, err := jsonhttp.ParseBody(r, ¶meters); err != nil {
jsonhttp.RenderError(w, s, err)
return
}
// Ensure that the vulnerability does not exist.
vulnerability, err := database.FindOneVulnerability(parameters.ID, []string{})
if err != nil && err != cerrors.ErrNotFound {
jsonhttp.RenderError(w, 0, err)
return
}
if vulnerability != nil {
jsonhttp.RenderError(w, 0, cerrors.NewBadRequestError("vulnerability already exists"))
return
}
// Insert packages.
packages := database.AbstractPackagesToPackages(parameters.AffectedPackages)
err = database.InsertPackages(packages)
if err != nil {
jsonhttp.RenderError(w, 0, err)
return
}
var pkgNodes []string
for _, p := range packages {
pkgNodes = append(pkgNodes, p.Node)
}
// Insert vulnerability.
notifications, err := database.InsertVulnerabilities([]*database.Vulnerability{parameters.ToVulnerability(pkgNodes)})
if err != nil {
jsonhttp.RenderError(w, 0, err)
return
}
// Insert notifications.
err = database.InsertNotifications(notifications, database.GetDefaultNotificationWrapper())
if err != nil {
jsonhttp.RenderError(w, 0, err)
return
}
jsonhttp.Render(w, http.StatusCreated, nil)
}
// Run pops notifications from the database, lock them, send them, mark them as
// send and unlock them
//
// It uses an exponential backoff when POST requests fail
func (notifier *HTTPNotifier) Run(st *utils.Stopper) {
defer st.End()
whoAmI := uuid.New()
log.Infof("HTTP notifier started. URL: %s. Lock Identifier: %s", notifier.url, whoAmI)
for {
node, notification, err := database.FindOneNotificationToSend(database.GetDefaultNotificationWrapper())
if notification == nil || err != nil {
if err != nil {
log.Warningf("could not get notification to send: %s.", err)
}
if !st.Sleep(checkInterval) {
break
}
continue
}
// Try to lock the notification
hasLock, hasLockUntil := database.Lock(node, lockDuration, whoAmI)
if !hasLock {
continue
}
for backOff := time.Duration(0); ; backOff = timeutil.ExpBackoff(backOff, maxBackOff) {
// Backoff, it happens when an error occurs during the communication
// with the notification endpoint
if backOff > 0 {
// Renew lock before going to sleep if necessary
if time.Now().Add(backOff).After(hasLockUntil.Add(-refreshLockAnticipation)) {
hasLock, hasLockUntil = database.Lock(node, lockDuration, whoAmI)
if !hasLock {
log.Warning("lost lock ownership, aborting")
break
}
}
// Sleep
if !st.Sleep(backOff) {
return
}
}
// Get notification content
content, err := notification.GetContent()
if err != nil {
log.Warningf("could not get content of notification '%s': %s", notification.GetName(), err.Error())
break
}
// Marshal the notification content
jsonContent, err := json.Marshal(struct {
Name, Type string
Content interface{}
}{
Name: notification.GetName(),
Type: notification.GetType(),
Content: content,
})
if err != nil {
log.Errorf("could not marshal content of notification '%s': %s", notification.GetName(), err.Error())
break
}
// Post notification
req, _ := http.NewRequest("POST", notifier.url, bytes.NewBuffer(jsonContent))
req.Header.Set("Content-Type", "application/json")
client := &http.Client{}
res, err := client.Do(req)
if err != nil {
log.Warningf("could not post notification '%s': %s", notification.GetName(), err.Error())
continue
}
res.Body.Close()
if res.StatusCode != 200 && res.StatusCode != 201 {
log.Warningf("could not post notification '%s': got status code %d", notification.GetName(), res.StatusCode)
continue
}
// Mark the notification as sent
database.MarkNotificationAsSent(node)
log.Infof("sent notification '%s' successfully", notification.GetName())
break
}
if hasLock {
database.Unlock(node, whoAmI)
}
}
log.Info("HTTP notifier stopped")
}