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mailQueue.go
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mailQueue.go
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// ClueGetter - Does things with mail
//
// Copyright 2016 Dolf Schimmel, Freeaqingme.
//
// This Source Code Form is subject to the terms of the two-clause BSD license.
// For its contents, please refer to the LICENSE file.
//
package main
import (
"bytes"
"encoding/json"
"fmt"
"net/http"
"os"
"os/exec"
"path/filepath"
"strconv"
"strings"
"sync"
"time"
)
var mailQueueNames = []string{"incoming", "active", "deferred", "corrupt", "hold"}
func init() {
deleteQueue := make(chan string)
enable := func() bool { return Config.MailQueue.Enabled }
init := func() {
mailQueueStart(deleteQueue)
}
ModuleRegister(&module{
name: "mailQueue",
enable: &enable,
init: &init,
rpc: map[string]chan string{
"mailQueue!delete": deleteQueue,
},
httpHandlers: map[string]httpCallback{
"/mailqueue": mailQueueHttp,
"/mailqueue/delete": mailQueueHttpDelete,
},
})
}
type mailQueueItem struct {
Time time.Time // can be nil
Kv map[string]string
}
type mailQueueGetOptions struct {
Sender string
Recipient string
Instances []string
}
func mailQueueStart(deleteQueue chan string) {
if !Config.Redis.Enabled {
Log.Fatal("The mailQueue module requires the redis module to be enabled")
}
file, err := os.Open(Config.MailQueue.Spool_Dir)
if err != nil {
Log.Fatal("%s could not be opened", Config.MailQueue.Spool_Dir)
}
if fi, err := file.Stat(); err != nil || !fi.IsDir() {
Log.Fatal("%s could not be opened (or is not a directory)", Config.MailQueue.Spool_Dir)
}
for _, queueName := range mailQueueNames {
go mailQueueUpdate(queueName)
go func(queueName string) {
ticker := time.NewTicker(time.Duration(30) * time.Second)
for {
select {
case <-ticker.C:
mailQueueUpdate(queueName)
}
}
}(queueName)
}
go mailQueueHandleDeleteChannel(deleteQueue)
}
func mailQueueHandleDeleteChannel(deleteQueue chan string) {
for queueString := range deleteQueue {
queueIds := strings.Split(queueString, " ")
go mailQueueDeleteItems(queueIds)
}
}
func mailQueueDeleteItems(queueIds []string) {
args := make([]string, 0, len(queueIds)*2)
for _, queueId := range queueIds {
if queueId == "" {
continue
}
if queueId == "ALL" || len(queueId) > 20 {
Log.Notice("Received invalid queue id '%s'. Ignoring", queueId)
continue
}
args = append(args, "-d", queueId)
}
cmd := exec.Command("postsuper", args...)
cmd.Dir = "/"
var out bytes.Buffer
cmd.Stdout = &out
err := cmd.Run()
if err != nil {
Log.Error("Error ocurred while running postsuper: %s", err)
return
}
// If postsuper deleted 0 items, 0 lines are displayed.
// Otherwise it's no. of lines + 1.
linesOut := strings.Split(strings.Trim(out.String(), "\r"), "\n")
amountDeleted := len(linesOut) - 1
if amountDeleted < 0 {
amountDeleted = 0
}
Log.Notice("Deleted queue items. %d requested, %d were present and deleted",
len(queueIds), amountDeleted)
}
func mailQueueGetFromDataStore(options *mailQueueGetOptions) map[string][]*mailQueueItem {
serviceInOneOfInstances := func(service *service, instances []string) bool {
for _, instance := range instances {
if strconv.Itoa(int(service.Instance)) == instance {
return true
}
}
return false
}
senderLocal, senderDomain := messageParseAddress(options.Sender)
rcptLocal, rcptDomain := messageParseAddress(options.Recipient)
out := make(map[string][]*mailQueueItem, 0)
for _, queueName := range mailQueueNames {
out[queueName] = make([]*mailQueueItem, 0)
for _, service := range redisGetServices() {
if !serviceInOneOfInstances(service, options.Instances) {
continue
}
key := fmt.Sprintf("cluegetter-%d-mailqueue-%s-%s",
service.Instance, service.Hostname, queueName)
for _, jsonStr := range redisClient.LRange(key, 0, -1).Val() {
item := &mailQueueItem{}
err := json.Unmarshal([]byte(jsonStr), &item)
if err != nil {
Log.Error("Could not parse json string: %s", err.Error())
continue
}
if options.Sender == "" && options.Recipient == "" {
out[queueName] = append(out[queueName], item)
continue
}
itemSenderLocal, itemSenderDomain := messageParseAddress(item.Kv["sender"])
itemRcptLocal, itemRcptDomain := messageParseAddress(item.Kv["recipient"])
if ((senderLocal == "" || itemSenderLocal == senderLocal) &&
itemSenderDomain == senderDomain) || options.Sender == "" {
if ((rcptLocal == "" || itemRcptLocal == rcptLocal) &&
itemRcptDomain == rcptDomain) || options.Recipient == "" {
out[queueName] = append(out[queueName], item)
}
}
}
}
}
return out
}
func mailQueueUpdate(queueName string) {
defer cluegetterRecover("mailQueueUpdate")
t0 := time.Now()
wg := &sync.WaitGroup{}
path := fmt.Sprintf("%s/%s/", Config.MailQueue.Spool_Dir, queueName)
files := make(chan string, 1024)
envelopes := make(chan *mailQueueItem, 512)
wg.Add(1)
go mailQueueProcessFileList(wg, files, path, envelopes)
go func() {
defer cluegetterRecover("mailQueueUpdate")
count := mailQueueAddToRedis(envelopes, queueName)
Log.Info("Imported %d items from the '%s' mailqueue into Redis in %.2f seconds",
count, queueName, time.Now().Sub(t0).Seconds())
}()
pathLen := len(path)
err := filepath.Walk(path, func(path string, f os.FileInfo, err error) error {
if !f.IsDir() {
files <- path[pathLen:]
}
return nil
})
close(files)
wg.Wait()
close(envelopes)
if err != nil {
Log.Error("Could not walk %s, got error: %s", path, err.Error())
}
}
func mailQueueAddToRedis(envelopes chan *mailQueueItem, queueName string) int {
count := 0
key := fmt.Sprintf("cluegetter-%d-mailqueue-%s-%s", instance, hostname, queueName)
tx, _ := redisNewTransaction(key)
_, err := tx.Exec(func() error {
tx.Del(key)
for envelope := range envelopes {
count++
envelopeStr, _ := json.Marshal(envelope)
tx.LPush(key, string(envelopeStr))
}
tx.Expire(key, time.Duration(5)*time.Minute)
return nil
})
if err != nil {
Log.Error("Could not update mailqueue %s, got error updating Redis: %s", queueName, err.Error())
}
return count
}
func mailQueueProcessFileList(wg *sync.WaitGroup, files chan string, path string, envelopes chan *mailQueueItem) {
defer cluegetterRecover("mailQueueProcessFileList")
filesBatch := make([]string, 0, 256)
for file := range files {
filesBatch = append(filesBatch, file)
if len(filesBatch) >= 256 {
wg.Add(1)
go func(filesBatch []string) {
mailQueueProcessFiles(filesBatch, path, envelopes)
wg.Done()
}(filesBatch)
filesBatch = make([]string, 0, 256)
}
}
go func(filesBatch []string) {
mailQueueProcessFiles(filesBatch, path, envelopes)
wg.Done()
}(filesBatch)
}
func mailQueueProcessFiles(filesBatch []string, path string, envelopes chan *mailQueueItem) {
defer cluegetterRecover("mailQueueProcessFileList")
cmd := exec.Command("postcat", append([]string{"-e"}, filesBatch...)...)
cmd.Dir = path
var out bytes.Buffer
cmd.Stdout = &out
err := cmd.Run()
if err != nil {
Log.Error("Error ocurred while running postcat: %s", err)
return
}
for _, envelope := range strings.Split(out.String(), "*** ENVELOPE RECORDS ")[1:] {
item, err := mailQueueParseEnvelopeString(envelope)
if err != nil {
Log.Error("Could not parse envelope string: %s", err.Error())
continue
}
envelopes <- item
}
}
func mailQueueParseEnvelopeString(envelopeStr string) (*mailQueueItem, error) {
lines := strings.Split(envelopeStr, "\n")
queueId := strings.SplitN(lines[0], " ", 2)[0]
if len(queueId) < 6 {
return nil, fmt.Errorf("Could not determine queue id")
}
item := &mailQueueItem{
Kv: make(map[string]string),
}
for _, line := range lines {
kv := strings.SplitN(line, ": ", 2)
if len(kv) != 2 {
continue
}
if kv[0] == "named_attribute" {
kv = strings.SplitN(kv[1], "=", 2)
if len(kv) != 2 {
Log.Notice("Got named_attribute with no value: %s", kv[0])
continue
}
}
item.Kv[strings.Trim(kv[0], " ")] = strings.Trim(kv[1], " ")
}
if _, ok := item.Kv["create_time"]; !ok {
Log.Notice("Item %s has no field 'create_time'", queueId)
return item, nil
}
tz, _ := time.Now().Local().Zone()
parsedTime, err := time.Parse("Mon Jan _2 15:04:05 2006 MST", item.Kv["create_time"]+" "+tz)
if err != nil {
Log.Notice("Could not parse time ('%s') for item %s, error: %s", item.Kv["create_time"], queueId, err)
return item, nil
}
item.Time = parsedTime
return item, nil
}
func mailQueueHttp(w http.ResponseWriter, r *http.Request) {
r.ParseForm()
data := struct {
*HttpViewData
Instances []*httpInstance
QueueItems map[string][]*mailQueueItem
Sender string
Recipient string
}{
HttpViewData: httpGetViewData(),
Instances: httpGetInstances(),
}
selectedInstances, err := httpParseFilterInstance(r)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
httpSetSelectedInstances(data.Instances, selectedInstances)
data.Sender = r.FormValue("sender")
data.Recipient = r.FormValue("recipient")
data.QueueItems = mailQueueGetFromDataStore(&mailQueueGetOptions{
Sender: data.Sender,
Recipient: data.Recipient,
Instances: selectedInstances,
})
httpRenderOutput(w, r, "mailQueue.html", &data, &data.QueueItems)
}
func mailQueueHttpDelete(w http.ResponseWriter, r *http.Request) {
r.ParseForm()
for k, v := range r.Form {
if k != "queueId[]" {
continue
}
err := redisClient.Publish("cluegetter!!mailQueue!delete", strings.Join(v, " ")).Err()
if err != nil {
panic(err)
}
}
}