/
controllers.go
849 lines (805 loc) · 25.7 KB
/
controllers.go
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package main
import (
"bufio"
"bytes"
"encoding/base64"
"errors"
"fmt"
"html/template"
"io"
"io/fs"
"mime"
"net/mail"
"net/smtp"
"os"
"path/filepath"
"sort"
"strconv"
"strings"
"sync"
textTemplate "text/template"
"time"
"github.com/beego/beego/v2/server/web"
"github.com/jhillyerd/enmime"
"go4.org/must"
"golang.org/x/net/html"
"golang.org/x/text/encoding/charmap"
)
type typeHashID = hashID
var requestMailTemplate *textTemplate.Template
const (
accessSingle = iota
accessDirect
accessOlder
accessFull
)
func check(e error) {
if e != nil {
logger.Panic(e)
}
}
// getLogin takes the value of the HTTP “Authorization” header and returns the
// login name found in it.
func getLogin(authHeader string) (login string) {
components := strings.Split(authHeader, " ")
if len(components) != 2 || components[0] != "Basic" {
logger.Panic("Invalid Authorization header " + authHeader)
}
rawField, err := base64.StdEncoding.DecodeString(components[1])
check(err)
field := string(rawField)
components = strings.SplitN(field, ":", 2)
if len(components) != 2 {
logger.Panic("Invalid Authorization login+password string: " + field)
}
return components[0]
}
// getBodyNode is taken from https://stackoverflow.com/a/38855264/188108 and a
// helper for getBody(). It extracts the <body> element from the given HTML
// tree, or nil if it wasn’t found.
func getBodyNode(root *html.Node) (*html.Node, error) {
var body *html.Node
var crawler func(*html.Node)
crawler = func(node *html.Node) {
if node.Type == html.ElementNode && node.Data == "body" {
body = node
return
}
for child := node.FirstChild; child != nil; child = child.NextSibling {
crawler(child)
}
}
crawler(root)
if body != nil {
return body, nil
}
return nil, errors.New("Missing <body> in the node tree")
}
// substituteImgSrcs replaces in-place the src attributes of <img> tags, if
// they start with “cid:”. In this case, “hashID/img/” is prepended to the URL
// so that they are valid URL in the browser that can be responded to by the
// server.
func substituteImgSrcs(root *html.Node, urlPrefix, queryString string) {
var crawler func(*html.Node)
crawler = func(node *html.Node) {
if node.Type == html.ElementNode && node.Data == "img" {
for i, attribute := range node.Attr {
if attribute.Key == "src" && strings.HasPrefix(attribute.Val, "cid:") {
node.Attr[i].Val = urlPrefix + "/img/" + attribute.Val + queryString
}
}
}
for child := node.FirstChild; child != nil; child = child.NextSibling {
crawler(child)
}
}
crawler(root)
}
// getBody returns everything between <body>…</body> in the given HTML
// document, or the empty string it it wasn’t found. It is needed to embed
// HTML mails in an HTML document.
//
// BUG(bronger): We don’t do security sanitisation of the HTML here,
// e.g. removing all JavaScript, or preventing CSS to leak to the surrounding
// document.
func getBody(htmlDocument string, urlPrefix, queryString string) (string, error) {
root, err := html.Parse(strings.NewReader(htmlDocument))
if err != nil {
return "", err
}
bodyNode, err := getBodyNode(root)
if err != nil {
return "", err
}
substituteImgSrcs(bodyNode, urlPrefix, queryString)
var buffer bytes.Buffer
writer := io.Writer(&buffer)
for child := bodyNode.FirstChild; child != nil; child = child.NextSibling {
err := html.Render(writer, child)
check(err)
}
return buffer.String(), nil
}
// extractMessageID takes the value of the “Message-ID” header field of an
// email and strips whitespace and the <…> brackets. It returns the pure
// message ID, or the empty string if no ID was found.
func extractMessageID(rawHeader string) messageID {
match := referenceRegex.FindStringSubmatch(rawHeader)
if len(match) < 2 {
return ""
}
return messageID(match[1])
}
// collectThread returns the hash IDs of all mails in the thread the given hash
// ID is part of.
func collectThread(hashID hashID) (hashIDs map[hashID]bool) {
var flood func(typeHashID, map[typeHashID]bool)
flood = func(node typeHashID, visitedNodes map[typeHashID]bool) {
visitedNodes[node] = true
childrenLock.RLock()
for child := range children[node] {
if !visitedNodes[child] {
flood(child, visitedNodes)
}
}
childrenLock.RUnlock()
backReferencesLock.RLock()
for ancestor := range backReferences[node] {
if !visitedNodes[ancestor] {
flood(ancestor, visitedNodes)
}
}
backReferencesLock.RUnlock()
}
hashIDs = make(map[typeHashID]bool)
flood(hashID, hashIDs)
return
}
// collectSubthread returns the hash IDs of all mails in the thread the given
// hash ID is root of.
func collectSubthread(hashID hashID) (hashIDs map[hashID]bool) {
var flood func(typeHashID, map[typeHashID]bool)
flood = func(node typeHashID, visitedNodes map[typeHashID]bool) {
visitedNodes[node] = true
childrenLock.RLock()
for child := range children[node] {
if !visitedNodes[child] {
flood(child, visitedNodes)
}
}
childrenLock.RUnlock()
}
hashIDs = make(map[typeHashID]bool)
flood(hashID, hashIDs)
return
}
// existingMail returns whether the given mail exists on the filesystem or not.
// If not, it is only found in the back references of existing mails.
func existingMail(hashID hashID) (existing bool) {
mailPathsLock.RLock()
existing = mailPaths[hashID] != ""
mailPathsLock.RUnlock()
return
}
var cachedRoots sync.Map
// findThreadRoot returns the hash ID of the root element of the thread the
// given mail appears in. If there is no thread, the hash ID of the given mail
// is returned. It returns the empty string if that hash ID cannot be
// extracted, or if the thread has a depth larger than 100.
func findThreadRoot(m *enmime.Envelope) (root hashID) {
messageID := extractMessageID(m.GetHeader("Message-ID"))
if messageID == "" {
return ""
}
hashID := messageIDToHashID(messageID)
if raw, ok := cachedRoots.Load(hashID); ok {
return raw.(typeHashID)
}
nodes := collectThread(hashID)
visitedNodes := make(map[typeHashID]bool, len(nodes))
var threadSize int
var existingCandidates, nonexistingCandidates map[typeHashID]bool
for node := range nodes {
if !visitedNodes[node] {
nodeThread := collectSubthread(node)
for node_ := range nodeThread {
visitedNodes[node_] = true
}
nodeThreadSize := len(nodeThread)
if nodeThreadSize > threadSize {
threadSize = nodeThreadSize
existingCandidates = make(map[typeHashID]bool)
nonexistingCandidates = make(map[typeHashID]bool)
if existingMail(node) {
existingCandidates[node] = true
} else {
nonexistingCandidates[node] = true
}
} else if nodeThreadSize == threadSize {
if existingMail(node) {
existingCandidates[node] = true
} else {
nonexistingCandidates[node] = true
}
}
}
}
var candidates []typeHashID
if len(existingCandidates) > 0 {
for node := range existingCandidates {
candidates = append(candidates, node)
}
if len(candidates) != len(existingCandidates) {
logger.Panic("Duplicate found in existingCandidates")
}
} else {
for node := range nonexistingCandidates {
candidates = append(candidates, node)
}
if len(candidates) != len(nonexistingCandidates) {
logger.Panic("Duplicate found in nonexistingCandidates")
}
}
sort.Slice(candidates, func(i, j int) bool { return candidates[i] < candidates[j] })
root = candidates[0]
for node := range nodes {
if existingMail(node) {
cachedRoots.Store(node, root)
}
}
return root
}
// threadNode represents one mail in a nested thread. All members are
// expotable because they are needed in the templates.
type threadNode struct {
MessageID messageID
From, Subject string
RootURL string
Link template.URL
Children []*threadNode
}
// decodeRFC2047 returns the given raw mail header (RFC-2047-encoded and
// quoted-printable) as a proper string.
func decodeRFC2047(header string) string {
decoder := mime.WordDecoder{
func(charset string, input io.Reader) (io.Reader, error) {
switch charset {
case "windows-1252", "cp1252":
return charmap.Windows1252.NewDecoder().Reader(input), nil
case "iso-8859-2":
return charmap.ISO8859_2.NewDecoder().Reader(input), nil
case "iso-8859-15":
return charmap.ISO8859_15.NewDecoder().Reader(input), nil
}
return nil, fmt.Errorf("unknown encoding %v", header)
},
}
result, err := decoder.DecodeHeader(header)
if err == nil {
return result
} else {
logger.Println("RFC2047 decoding error:", err)
logger.Println("Header was:", header)
return header
}
}
// threadNodeByHashID returns the given message as a single threadNode,
// i.e. the Children are not yet populated. It handles the case the the hashID
// points to a fake thread root, i.e. a mail that is references to by other
// mails, but that is not part of the mail archive.
func threadNodeByHashID(hashID hashID) *threadNode {
mailPathsLock.RLock()
path := mailPaths[hashID]
mailPathsLock.RUnlock()
if path == "" {
return &threadNode{
From: "unknown",
Subject: "unknown",
RootURL: rootURL,
}
}
file, err := os.Open(path)
check(err)
defer must.Close(file)
message, err := mail.ReadMessage(file)
var from, subject string
if err == nil {
from = decodeRFC2047(message.Header.Get("From"))
subject = decodeRFC2047(message.Header.Get("Subject"))
} else {
from = "unknown"
subject = "unknown"
}
messageID := extractMessageID(message.Header.Get("Message-ID"))
return &threadNode{
messageID,
from,
subject,
rootURL,
"",
nil,
}
}
// buildThread returns the thread to the given root hash ID as a nested
// structure of threadNode’s.
func buildThread(root, originHashID hashID, accessMode int) (rootNode *threadNode, originIncluded bool) {
originIncluded = root == originHashID
rootNode = threadNodeByHashID(root)
childrenLock.RLock()
root_children := children[root]
childrenLock.RUnlock()
children := make(map[hashID]bool)
for child := range root_children {
children[child] = true
}
for child := range root_children {
if accessMode != accessFull {
timestampsLock.RLock()
after := timestamps[child].After(timestamps[originHashID])
timestampsLock.RUnlock()
if after {
continue
}
}
grandChild := false
for backReference := range backReferences[child] {
if children[backReference] {
grandChild = true
break
}
}
if grandChild {
continue
}
childNode, originIncludedInChild := buildThread(child, originHashID, accessMode)
if childNode != nil {
originIncluded = originIncluded || originIncludedInChild
rootNode.Children = append(rootNode.Children, childNode)
}
}
if accessMode == accessDirect && len(rootNode.Children) == 0 && root != originHashID {
return nil, false
}
sort.SliceStable(rootNode.Children, func(i, j int) bool {
hashID_i := messageIDToHashID(rootNode.Children[i].MessageID)
hashID_j := messageIDToHashID(rootNode.Children[j].MessageID)
timestampsLock.RLock()
before := timestamps[hashID_i].Before(timestamps[hashID_j])
timestampsLock.RUnlock()
return before
})
return
}
// messageIDtoURL returns a URL-safe string representation of the given message
// ID. It still needs proper percent escaping, it just handles slashes in
// message IDs, which never seem to be esscaped by Go’s template engine. See,
// e.g., <https://github.com/golang/go/issues/3659>.
func messageIDtoURL(messageID messageID) string {
return strings.ReplaceAll(string(messageID), "/", ">")
}
// messageIDfromURL is the inverse of messageIDtoURL. It takes a URL component
// (i.e., something that must never contain slashes) and returns the original
// message ID.
func messageIDfromURL(urlComponent string) messageID {
return messageID(strings.ReplaceAll(urlComponent, ">", "/"))
}
// finalizeThread walks through a thread and removes the links (which is
// identical to the hash ID since this is the only elements in the URL path)
// from the node the hash ID of which matches the given one. The reason is
// that when displaying the thread in the browser, the current email should not
// be hyperlinked.
func finalizeThread(messageID messageID, originHashID hashID, thread *threadNode, queryString template.URL) *threadNode {
if thread.MessageID == "" || thread.MessageID == messageID {
thread.Link = ""
} else {
if hashMessageID(thread.MessageID, "") == originHashID {
thread.Link = template.URL(originHashID)
} else {
thread.Link = template.URL(fmt.Sprintf("%v/%v", originHashID, messageIDtoURL(thread.MessageID)))
}
thread.Link += queryString
}
for _, child := range thread.Children {
finalizeThread(messageID, originHashID, child, queryString)
}
return thread
}
// readMail reads an RFC 5322 file and returns it as a mail object. The
// returned error is non-nil only if the mail file could not be found.
func readMail(mailPath string) (message *enmime.Envelope, err error) {
file, err := os.Open(mailPath)
if errors.Is(err, fs.ErrNotExist) {
return
}
check(err)
defer must.Close(file)
message, err = enmime.ReadEnvelope(file)
check(err)
return
}
// readOriginMail is a helper for getMailAndThreadRoot. It returns hash ID,
// message object, thread root ID, access mode (only one mail, whole thread
// etc.) and token for the *origin* mail, i.e. the one given in the hash
// component of the URL (in contrast to the optional message ID component). It
// may trigger an HTTP 404 if the mail file was not found, and an HTTP 403 if a
// tokenFull is given but invalid.
func readOriginMail(controller *web.Controller) (
hashID hashID, message *enmime.Envelope, threadRoot hashID, messageID messageID, accessMode int, token string) {
hashID = typeHashID(controller.Ctx.Input.Param(":hash"))
mailPathsLock.RLock()
mailPath := mailPaths[hashID]
mailPathsLock.RUnlock()
message, err := readMail(mailPath)
if err != nil {
controller.Abort("404")
}
messageID = extractMessageID(message.GetHeader("Message-ID"))
accessMode = accessSingle
scanForToken := func(name string) bool {
token = controller.GetString("token" + strings.Title(name))
if token != "" {
if token != string(hashMessageID(messageID, name)) {
logger.Printf(
"Denied access because token %v is invalid for message ID %v and access mode %v",
token, messageID, name)
controller.Abort("403")
}
return true
}
return false
}
switch true {
case scanForToken("direct"):
accessMode = accessDirect
case scanForToken("older"):
accessMode = accessOlder
case scanForToken("full"):
accessMode = accessFull
}
if accessMode != accessSingle {
threadRoot = findThreadRoot(message)
}
return
}
// getMailAndThreadRoot encapsulates common code used in some controllers. It
// returns data for both the concrete (given by the message ID in the URL) and
// the original mail (given by the hash in the URL). It checks whether a token
// – if given – is valid and may trigger HTTP 4… errors.
func getMailAndThreadRoot(controller *web.Controller) (accessMode int, token string, messageID messageID,
hashID, threadRoot, originHashID hashID, message *enmime.Envelope, link string) {
messageID = messageIDfromURL(controller.Ctx.Input.Param(":messageid"))
if messageID == "" {
hashID, message, threadRoot, messageID, accessMode, token = readOriginMail(controller)
originHashID = hashID
link = string(hashID)
} else {
var originThreadRoot typeHashID
originHashID, _, originThreadRoot, _, accessMode, token = readOriginMail(controller)
if accessMode == accessSingle {
logger.Println("Denied access because message ID parameter is forbidden for single access mode")
controller.Abort("403")
}
hashID = messageIDToHashID(messageID)
mailPathsLock.RLock()
mailPath := mailPaths[hashID]
mailPathsLock.RUnlock()
var err error
message, err = readMail(mailPath)
if err != nil {
controller.Abort("404")
}
if accessMode != accessSingle {
threadRoot = findThreadRoot(message)
if originThreadRoot != threadRoot {
mailPathsLock.RLock()
originThreadRootPath := mailPaths[originThreadRoot]
threadRootPath := mailPaths[threadRoot]
mailPathsLock.RUnlock()
if originThreadRootPath == "" {
originThreadRootPath = "<invalid hash ID!>"
}
if threadRootPath == "" {
threadRootPath = "<invalid hash ID!>"
}
logger.Printf(
"Denied access because message ID %v and hash ID %v are different threads: %v, %v",
messageID, originHashID, originThreadRootPath, threadRootPath)
controller.Abort("403")
}
}
link = fmt.Sprintf("%v/%v", originHashID, messageIDtoURL(messageID))
}
return
}
// pathToLink generates a nice title for the mail Web page. It extracts the
// “folder/id” from the given full mail path.
func pathToLink(path string) string {
prefix, id := filepath.Split(path)
_, folder := filepath.Split(strings.TrimSuffix(prefix, "/"))
return folder + "/" + id
}
type MainController struct {
web.Controller
}
// Controller for viewing a particular email.
func (this *MainController) Get() {
accessMode, token, messageID, hashID, threadRoot, originHashID, message, link :=
getMailAndThreadRoot(&this.Controller)
var queryString template.URL
if accessMode != accessSingle {
var key string
switch accessMode {
case accessDirect:
key = "tokenDirect"
case accessOlder:
key = "tokenOlder"
case accessFull:
key = "tokenFull"
}
queryString = template.URL("?" + key + "=" + token)
this.Data["queryString"] = queryString
}
if threadRoot != "" {
thread, originIncluded := buildThread(threadRoot, originHashID, accessMode)
if !originIncluded {
logger.Printf("Denied access because selected mail %v is not included in allowed thread", messageID)
this.Abort("403")
}
this.Data["thread"] = finalizeThread(messageID, originHashID, thread, queryString)
}
this.TplName = "index.tpl"
this.Data["rooturl"] = rootURL
this.Data["link"] = template.URL(link)
this.Data["from"] = message.GetHeader("From")
this.Data["subject"] = message.GetHeader("Subject")
this.Data["to"] = message.GetHeader("To")
this.Data["cc"] = message.GetHeader("Cc")
this.Data["date"] = message.GetHeader("Date")
this.Data["text"] = message.Text
mailPathsLock.RLock()
path := mailPaths[hashID]
mailPathsLock.RUnlock()
this.Data["name"] = pathToLink(path)
body, err := getBody(message.HTML, rootURL+"/"+link, string(queryString))
check(err)
this.Data["html"] = template.HTML(body)
var attachments []string
for _, currentAttachment := range message.Attachments {
attachments = append(attachments, currentAttachment.FileName)
}
this.Data["attachments"] = attachments
}
type AttachmentController struct {
web.Controller
}
// Controller for downloading mail attachments.
func (this *AttachmentController) Get() {
_, _, _, _, _, _, message, _ := getMailAndThreadRoot(&this.Controller)
index, err := strconv.Atoi(this.Ctx.Input.Param(":index"))
check(err)
this.Ctx.Output.Header("Content-Disposition",
fmt.Sprintf("attachment; filename=\"%v\"", message.Attachments[index].FileName))
this.Ctx.Output.Header("Content-Type", message.Attachments[index].ContentType)
err = this.Ctx.Output.Body(message.Attachments[index].Content)
check(err)
}
type ImageController struct {
web.Controller
}
// getImage extracts an inline image from a mail. It returns the image data,
// content type, and – if there is one – a filename.
func getImage(message *enmime.Envelope, cid string) ([]byte, string, string, error) {
var allParts []*enmime.Part
allParts = append(allParts, message.Inlines...)
allParts = append(allParts, message.OtherParts...)
for _, part := range allParts {
if part.ContentID != "" {
match := cidRegex.FindStringSubmatch(part.ContentID)
if len(match) == 2 {
partCid := match[1]
if "cid:"+partCid == cid {
return part.Content, part.ContentType, part.FileName, nil
}
} else {
logger.Println("Could not match", part.ContentID)
}
}
}
return nil, "", "", fmt.Errorf("image %v not found in email", cid)
}
// Controller for downloading mail images.
func (this *ImageController) Get() {
_, _, _, _, _, _, message, _ := getMailAndThreadRoot(&this.Controller)
cid := this.Ctx.Input.Param(":cid")
content, contentType, filename, err := getImage(message, cid)
check(err)
if filename == "" {
this.Ctx.Output.Header("Content-Disposition", "inline")
} else {
this.Ctx.Output.Header("Content-Disposition", fmt.Sprintf("attachment; filename=\"%v\"", filename))
}
this.Ctx.Output.Header("Content-Type", contentType)
err = this.Ctx.Output.Body(content)
check(err)
}
// filterHeaders reads the specified mail, removed headers that should not be
// shared with external due to technical or privacy reasons, and returns the
// result. It panics whenever something wents wrong, as it assumes that the
// basic checks (e.g. that the mail file exists) have been made already.
func filterHeaders(hashID hashID) []byte {
mailPathsLock.RLock()
file, err := os.Open(mailPaths[hashID])
mailPathsLock.RUnlock()
check(err)
defer must.Close(file)
scanner := bufio.NewScanner(file)
var lines [][]byte
const (
inHeader = iota
inDeletion
inBody
)
state := inHeader
for scanner.Scan() {
line := make([]byte, len(scanner.Bytes()))
copy(line, scanner.Bytes())
if state != inBody {
if len(line) == 0 {
state = inBody
} else {
if state == inHeader {
allLower := bytes.ToLower(line)
for _, header := range [...]string{"Gcc", "Received", "Sender", "Return-Path",
"X-Envelope-From", "Envelope-From", "Envelope-To", "Delivered-To",
"X-Gnus-Mail-Source", "X-From-Line", "Face", "X-Draft-From"} {
allLowerKey := strings.ToLower(header) + ":"
if bytes.HasPrefix(allLower, []byte(allLowerKey)) {
state = inDeletion
goto Ignore
}
}
} else {
if bytes.HasPrefix(line, []byte(" ")) {
goto Ignore
} else {
state = inHeader
}
}
}
}
lines = append(lines, line)
Ignore:
}
err = scanner.Err()
check(err)
return append(bytes.Join(lines, []byte("\r\n")), []byte("\r\n")...)
}
type SendController struct {
web.Controller
}
// Controller for getting the current email being sent to the logged-in person.
func (this *SendController) Get() {
loginName := getLogin(this.Ctx.Input.Header("Authorization"))
emailAddress := getEmailAddress(loginName)
if emailAddress == "" {
logger.Panicf("email address of %v not found", loginName)
}
_, _, _, hashID, _, _, _, _ := getMailAndThreadRoot(&this.Controller)
mailBody := filterHeaders(hashID)
err := smtp.SendMail(os.Getenv("M2W_SMTP_HOST"), nil, os.Getenv("M2W_SMTP_ENVELOPE_SENDER"),
[]string{emailAddress}, mailBody)
check(err)
this.Data["hash"] = hashID
this.Data["address"] = emailAddress
this.TplName = "sent.tpl"
this.Data["rooturl"] = rootURL
}
type MyMailsController struct {
web.Controller
}
// Controller for searching for mail by message ID/getting an emails by its message ID
func (this *MyMailsController) Get() {
loginName := getLogin(this.Ctx.Input.Header("Authorization"))
emailAddress := getEmailAddress(loginName)
if emailAddress == "" {
logger.Panicf("email address of %v not found", loginName)
}
var rows []mailInfo
mailsByAddressLock.RLock()
for _, mailInfo := range mailsByAddress[emailAddress] {
rows = append(rows, mailInfo)
}
mailsByAddressLock.RUnlock()
logger.Println(len(rows))
sort.SliceStable(rows, func(i, j int) bool {
return rows[i].Timestamp.After(rows[j].Timestamp)
})
limit := len(rows)
for i, mail := range rows {
if time.Since(mail.Timestamp) > thirtyDays {
limit = i
break
}
}
this.Data["rows"] = rows[:limit]
this.TplName = "my_mails.tpl"
this.Data["rooturl"] = rootURL
}
type MailRequestController struct {
web.Controller
}
// Controller for requesting the hash of a certain email.
func (this *MailRequestController) Get() {
loginName := getLogin(this.Ctx.Input.Header("Authorization"))
emailAddress := getEmailAddress(loginName)
if emailAddress == "" {
logger.Panicf("email address of %v not found", loginName)
}
messageID := messageIDfromURL(this.Ctx.Input.Param(":messageid"))
hashID := messageIDToHashID(messageID)
mailPathsLock.RLock()
mailPath := mailPaths[hashID]
mailPathsLock.RUnlock()
if mailPath == "" {
this.Abort("404")
}
file, err := os.Open(mailPath)
check(err)
defer must.Close(file)
message, err := mail.ReadMessage(file)
if err != nil {
logger.Println(err)
this.Abort("404")
}
matches := emailRegex.FindAllStringSubmatch(message.Header.Get("From"), -1)
matches = append(matches, emailRegex.FindAllStringSubmatch(message.Header.Get("To"), -1)...)
matches = append(matches, emailRegex.FindAllStringSubmatch(message.Header.Get("Cc"), -1)...)
matches = append(matches, emailRegex.FindAllStringSubmatch(message.Header.Get("Bcc"), -1)...)
addresses := make(map[string]bool)
for _, match := range matches {
addresses[strings.ToLower(match[0])] = true
}
var found bool
for _, address := range permissions.Addresses[loginName] {
if addresses[address] {
found = true
break
}
}
if !found {
this.Abort("403")
}
adminMails := permissions.Addresses[permissions.Admin]
if len(adminMails) == 0 {
this.Abort("500")
}
adminMail := adminMails[0]
link := fmt.Sprintf("%v/%v", rootURL, hashID)
fullThreadLink := fmt.Sprintf("%v?tokenFull=%v", link, string(hashMessageID(messageID, "full")))
mailContent := new(bytes.Buffer)
err = requestMailTemplate.Execute(mailContent, map[string]string{
"loginName": loginName, "link": link, "fullThreadLink": fullThreadLink})
check(err)
err = enmime.Builder().
From("", adminMail).
Subject("Request for hash ID for mail "+loginName).
ReplyTo("", emailAddress).
Text(mailContent.Bytes()).
To("", adminMail).Send("postfix:587", nil)
check(err)
this.TplName = "mailRequest.tpl"
this.Data["messageid"] = messageID
}
type HealthController struct {
web.Controller
}
// Controller for the /healthz endpoint.
func (this *HealthController) Get() {
err := this.Ctx.Output.Body([]byte{})
check(err)
}
func init() {
templateContent, err := os.ReadFile("requestMail.tpl")
check(err)
requestMailTemplate = textTemplate.Must(textTemplate.New("mail").Parse(string(templateContent)))
}