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Remove data package
This commit is contained in:
Ian Kent
parent
5948ba152d
commit
ac84efffe4
1 changed files with 0 additions and 203 deletions
203
data/message.go
203
data/message.go
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@ -1,203 +0,0 @@
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package data
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import (
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"crypto/rand"
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"encoding/base64"
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"log"
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"regexp"
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"strings"
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"time"
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)
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// MessageID represents the ID of an SMTP message including the hostname part
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type MessageID string
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// NewMessageID generates a new message ID
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func NewMessageID(hostname string) (MessageID, error) {
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size := 32
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rb := make([]byte, size)
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_, err := rand.Read(rb)
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if err != nil {
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return MessageID(""), err
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}
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rs := base64.URLEncoding.EncodeToString(rb)
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return MessageID(rs + "@" + hostname), nil
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}
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// Messages represents an array of Messages
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// - TODO is this even required?
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type Messages []Message
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// Message represents a parsed SMTP message
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type Message struct {
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ID MessageID
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From *Path
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To []*Path
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Content *Content
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Created time.Time
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MIME *MIMEBody // FIXME refactor to use Content.MIME
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}
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// Path represents an SMTP forward-path or return-path
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type Path struct {
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Relays []string
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Mailbox string
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Domain string
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Params string
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}
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// Content represents the body content of an SMTP message
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type Content struct {
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Headers map[string][]string
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Body string
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Size int
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MIME *MIMEBody
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}
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// SMTPMessage represents a raw SMTP message
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type SMTPMessage struct {
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From string
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To []string
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Data string
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Helo string
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}
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// MIMEBody represents a collection of MIME parts
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type MIMEBody struct {
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Parts []*Content
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}
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// Parse converts a raw SMTP message to a parsed MIME message
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func (m *SMTPMessage) Parse(hostname string) *Message {
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var arr []*Path
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for _, path := range m.To {
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arr = append(arr, PathFromString(path))
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}
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id, _ := NewMessageID(hostname)
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msg := &Message{
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ID: id,
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From: PathFromString(m.From),
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To: arr,
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Content: ContentFromString(m.Data),
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Created: time.Now(),
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}
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if msg.Content.IsMIME() {
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log.Printf("Parsing MIME body")
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msg.MIME = msg.Content.ParseMIMEBody()
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}
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msg.Content.Headers["Message-ID"] = []string{string(id)}
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msg.Content.Headers["Received"] = []string{"from " + m.Helo + " by " + hostname + " (Go-MailHog)\r\n id " + string(id) + "; " + time.Now().Format(time.RFC1123Z)}
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msg.Content.Headers["Return-Path"] = []string{"<" + m.From + ">"}
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return msg
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}
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// IsMIME detects a valid MIME header
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func (content *Content) IsMIME() bool {
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header, ok := content.Headers["Content-Type"]
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if !ok {
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return false
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}
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return strings.HasPrefix(header[0], "multipart/")
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}
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// ParseMIMEBody parses SMTP message content into multiple MIME parts
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func (content *Content) ParseMIMEBody() *MIMEBody {
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var parts []*Content
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if hdr, ok := content.Headers["Content-Type"]; ok {
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if len(hdr) > 0 {
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re := regexp.MustCompile("boundary=\"([^\"]+)\"")
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match := re.FindStringSubmatch(hdr[0])
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if len(match) < 2 {
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log.Printf("Boundary not found: %s", hdr[0])
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}
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log.Printf("Got boundary: %s", match[1])
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p := strings.Split(content.Body, "--"+match[1])
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for _, s := range p {
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if len(s) > 0 {
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part := ContentFromString(strings.Trim(s, "\r\n"))
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if part.IsMIME() {
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log.Printf("Parsing inner MIME body")
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part.MIME = part.ParseMIMEBody()
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}
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parts = append(parts, part)
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}
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}
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}
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}
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return &MIMEBody{
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Parts: parts,
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}
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}
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// PathFromString parses a forward-path or reverse-path into its parts
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func PathFromString(path string) *Path {
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var relays []string
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email := path
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if strings.Contains(path, ":") {
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x := strings.SplitN(path, ":", 2)
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r, e := x[0], x[1]
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email = e
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relays = strings.Split(r, ",")
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}
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mailbox, domain := "", ""
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if strings.Contains(email, "@") {
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x := strings.SplitN(email, "@", 2)
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mailbox, domain = x[0], x[1]
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} else {
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mailbox = email
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}
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return &Path{
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Relays: relays,
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Mailbox: mailbox,
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Domain: domain,
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Params: "", // FIXME?
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}
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}
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// ContentFromString parses SMTP content into separate headers and body
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func ContentFromString(data string) *Content {
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log.Printf("Parsing Content from string: '%s'", data)
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x := strings.SplitN(data, "\r\n\r\n", 2)
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h := make(map[string][]string, 0)
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if len(x) == 2 {
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headers, body := x[0], x[1]
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hdrs := strings.Split(headers, "\r\n")
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var lastHdr = ""
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for _, hdr := range hdrs {
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if lastHdr != "" && (strings.HasPrefix(hdr, " ") || strings.HasPrefix(hdr, "\t")) {
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h[lastHdr][len(h[lastHdr])-1] = h[lastHdr][len(h[lastHdr])-1] + hdr
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} else if strings.Contains(hdr, ": ") {
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y := strings.SplitN(hdr, ": ", 2)
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key, value := y[0], y[1]
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// TODO multiple header fields
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h[key] = []string{value}
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lastHdr = key
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} else {
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log.Printf("Found invalid header: '%s'", hdr)
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}
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}
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return &Content{
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Size: len(data),
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Headers: h,
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Body: body,
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}
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}
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return &Content{
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Size: len(data),
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Headers: h,
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Body: x[0],
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}
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}
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