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Merge pull request #182 from wneessen/feature/179_refactor-variable-names-for-readability

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Refactor variable names for readability
This commit is contained in:
Winni Neessen 2024-02-27 12:04:17 +01:00 committed by GitHub
commit 1c883a8ed4
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GPG key ID: B5690EEEBB952194
21 changed files with 1086 additions and 1059 deletions
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22
b64linebreaker.go
View file

@ -20,39 +20,39 @@ type Base64LineBreaker struct {
out io.Writer
}
var nl = []byte(SingleNewLine)
var newlineBytes = []byte(SingleNewLine)
// Write writes the data stream and inserts a SingleNewLine when the maximum
// line length is reached
func (l *Base64LineBreaker) Write(b []byte) (n int, err error) {
func (l *Base64LineBreaker) Write(data []byte) (numBytes int, err error) {
if l.out == nil {
err = fmt.Errorf(ErrNoOutWriter)
return
}
if l.used+len(b) < MaxBodyLength {
copy(l.line[l.used:], b)
l.used += len(b)
return len(b), nil
if l.used+len(data) < MaxBodyLength {
copy(l.line[l.used:], data)
l.used += len(data)
return len(data), nil
}
n, err = l.out.Write(l.line[0:l.used])
numBytes, err = l.out.Write(l.line[0:l.used])
if err != nil {
return
}
excess := MaxBodyLength - l.used
l.used = 0
n, err = l.out.Write(b[0:excess])
numBytes, err = l.out.Write(data[0:excess])
if err != nil {
return
}
n, err = l.out.Write(nl)
numBytes, err = l.out.Write(newlineBytes)
if err != nil {
return
}
return l.Write(b[excess:])
return l.Write(data[excess:])
}
// Close closes the Base64LineBreaker and writes any access data that is still
@ -63,7 +63,7 @@ func (l *Base64LineBreaker) Close() (err error) {
if err != nil {
return
}
_, err = l.out.Write(nl)
_, err = l.out.Write(newlineBytes)
}
return

310
client.go
View file

@ -87,11 +87,11 @@ type DialContextFunc func(ctx context.Context, network, address string) (net.Con
// Client is the SMTP client struct
type Client struct {
// co is the net.Conn that the smtp.Client is based on
co net.Conn
// connection is the net.Conn that the smtp.Client is based on
connection net.Conn
// Timeout for the SMTP server connection
cto time.Duration
connTimeout time.Duration
// dsn indicates that we want to use DSN for the Client
dsn bool
@ -102,8 +102,8 @@ type Client struct {
// dsnrntype defines the DSNRcptNotifyOption in case DSN is enabled
dsnrntype []string
// enc indicates if a Client connection is encrypted or not
enc bool
// isEncrypted indicates if a Client connection is encrypted or not
isEncrypted bool
// noNoop indicates the Noop is to be skipped
noNoop bool
@ -121,17 +121,17 @@ type Client struct {
port int
fallbackPort int
// sa is a pointer to smtp.Auth
sa smtp.Auth
// smtpAuth is a pointer to smtp.Auth
smtpAuth smtp.Auth
// satype represents the authentication type for SMTP AUTH
satype SMTPAuthType
// smtpAuthType represents the authentication type for SMTP AUTH
smtpAuthType SMTPAuthType
// sc is the smtp.Client that is set up when using the Dial*() methods
sc *smtp.Client
// smtpClient is the smtp.Client that is set up when using the Dial*() methods
smtpClient *smtp.Client
// Use SSL for the connection
ssl bool
useSSL bool
// tlspolicy sets the client to use the provided TLSPolicy for the STARTTLS protocol
tlspolicy TLSPolicy
@ -142,11 +142,11 @@ type Client struct {
// user is the SMTP AUTH username
user string
// dl enables the debug logging on the SMTP client
dl bool
// useDebugLog enables the debug logging on the SMTP client
useDebugLog bool
// l is a logger that implements the log.Logger interface
l log.Logger
// logger is a logger that implements the log.Logger interface
logger log.Logger
// dialContextFunc is a custom DialContext function to dial target SMTP server
dialContextFunc DialContextFunc
@ -198,12 +198,12 @@ var (
)
// NewClient returns a new Session client object
func NewClient(h string, o ...Option) (*Client, error) {
func NewClient(host string, opts ...Option) (*Client, error) {
c := &Client{
cto: DefaultTimeout,
host: h,
connTimeout: DefaultTimeout,
host: host,
port: DefaultPort,
tlsconfig: &tls.Config{ServerName: h, MinVersion: DefaultTLSMinVersion},
tlsconfig: &tls.Config{ServerName: host, MinVersion: DefaultTLSMinVersion},
tlspolicy: DefaultTLSPolicy,
}
@ -213,11 +213,11 @@ func NewClient(h string, o ...Option) (*Client, error) {
}
// Override defaults with optionally provided Option functions
for _, co := range o {
if co == nil {
for _, opt := range opts {
if opt == nil {
continue
}
if err := co(c); err != nil {
if err := opt(c); err != nil {
return c, fmt.Errorf("failed to apply option: %w", err)
}
}
@ -231,23 +231,23 @@ func NewClient(h string, o ...Option) (*Client, error) {
}
// WithPort overrides the default connection port
func WithPort(p int) Option {
func WithPort(port int) Option {
return func(c *Client) error {
if p < 1 || p > 65535 {
if port < 1 || port > 65535 {
return ErrInvalidPort
}
c.port = p
c.port = port
return nil
}
}
// WithTimeout overrides the default connection timeout
func WithTimeout(t time.Duration) Option {
func WithTimeout(timeout time.Duration) Option {
return func(c *Client) error {
if t <= 0 {
if timeout <= 0 {
return ErrInvalidTimeout
}
c.cto = t
c.connTimeout = timeout
return nil
}
}
@ -257,7 +257,7 @@ func WithTimeout(t time.Duration) Option {
// Deprecated: use WithSSLPort instead.
func WithSSL() Option {
return func(c *Client) error {
c.ssl = true
c.useSSL = true
return nil
}
}
@ -267,9 +267,9 @@ func WithSSL() Option {
//
// When the SSL connection fails and fallback is set to true,
// the client will attempt to connect on port 25 using plaintext.
func WithSSLPort(fb bool) Option {
func WithSSLPort(fallback bool) Option {
return func(c *Client) error {
c.SetSSLPort(true, fb)
c.SetSSLPort(true, fallback)
return nil
}
}
@ -278,26 +278,26 @@ func WithSSLPort(fb bool) Option {
// to StdErr
func WithDebugLog() Option {
return func(c *Client) error {
c.dl = true
c.useDebugLog = true
return nil
}
}
// WithLogger overrides the default log.Logger that is used for debug logging
func WithLogger(l log.Logger) Option {
func WithLogger(logger log.Logger) Option {
return func(c *Client) error {
c.l = l
c.logger = logger
return nil
}
}
// WithHELO tells the client to use the provided string as HELO/EHLO greeting host
func WithHELO(h string) Option {
func WithHELO(helo string) Option {
return func(c *Client) error {
if h == "" {
if helo == "" {
return ErrInvalidHELO
}
c.helo = h
c.helo = helo
return nil
}
}
@ -305,9 +305,9 @@ func WithHELO(h string) Option {
// WithTLSPolicy tells the client to use the provided TLSPolicy
//
// Deprecated: use WithTLSPortPolicy instead.
func WithTLSPolicy(p TLSPolicy) Option {
func WithTLSPolicy(policy TLSPolicy) Option {
return func(c *Client) error {
c.tlspolicy = p
c.tlspolicy = policy
return nil
}
}
@ -319,52 +319,52 @@ func WithTLSPolicy(p TLSPolicy) Option {
// If the connection fails with TLSOpportunistic,
// a plaintext connection is attempted on port 25 as a fallback.
// NoTLS will allways use port 25.
func WithTLSPortPolicy(p TLSPolicy) Option {
func WithTLSPortPolicy(policy TLSPolicy) Option {
return func(c *Client) error {
c.SetTLSPortPolicy(p)
c.SetTLSPortPolicy(policy)
return nil
}
}
// WithTLSConfig tells the client to use the provided *tls.Config
func WithTLSConfig(co *tls.Config) Option {
func WithTLSConfig(tlsconfig *tls.Config) Option {
return func(c *Client) error {
if co == nil {
if tlsconfig == nil {
return ErrInvalidTLSConfig
}
c.tlsconfig = co
c.tlsconfig = tlsconfig
return nil
}
}
// WithSMTPAuth tells the client to use the provided SMTPAuthType for authentication
func WithSMTPAuth(t SMTPAuthType) Option {
func WithSMTPAuth(authtype SMTPAuthType) Option {
return func(c *Client) error {
c.satype = t
c.smtpAuthType = authtype
return nil
}
}
// WithSMTPAuthCustom tells the client to use the provided smtp.Auth for SMTP authentication
func WithSMTPAuthCustom(a smtp.Auth) Option {
func WithSMTPAuthCustom(smtpAuth smtp.Auth) Option {
return func(c *Client) error {
c.sa = a
c.smtpAuth = smtpAuth
return nil
}
}
// WithUsername tells the client to use the provided string as username for authentication
func WithUsername(u string) Option {
func WithUsername(username string) Option {
return func(c *Client) error {
c.user = u
c.user = username
return nil
}
}
// WithPassword tells the client to use the provided string as password/secret for authentication
func WithPassword(p string) Option {
func WithPassword(password string) Option {
return func(c *Client) error {
c.pass = p
c.pass = password
return nil
}
}
@ -386,9 +386,9 @@ func WithDSN() Option {
// as described in the RFC 1891 and set the MAIL FROM Return option type to the
// given DSNMailReturnOption
// See: https://www.rfc-editor.org/rfc/rfc1891
func WithDSNMailReturnType(mro DSNMailReturnOption) Option {
func WithDSNMailReturnType(option DSNMailReturnOption) Option {
return func(c *Client) error {
switch mro {
switch option {
case DSNMailReturnHeadersOnly:
case DSNMailReturnFull:
default:
@ -396,7 +396,7 @@ func WithDSNMailReturnType(mro DSNMailReturnOption) Option {
}
c.dsn = true
c.dsnmrtype = mro
c.dsnmrtype = option
return nil
}
}
@ -404,13 +404,13 @@ func WithDSNMailReturnType(mro DSNMailReturnOption) Option {
// WithDSNRcptNotifyType enables the Client to request DSNs as described in the RFC 1891
// and sets the RCPT TO notify options to the given list of DSNRcptNotifyOption
// See: https://www.rfc-editor.org/rfc/rfc1891
func WithDSNRcptNotifyType(rno ...DSNRcptNotifyOption) Option {
func WithDSNRcptNotifyType(opts ...DSNRcptNotifyOption) Option {
return func(c *Client) error {
var rnol []string
var rcptOpts []string
var ns, nns bool
if len(rno) > 0 {
for _, crno := range rno {
switch crno {
if len(opts) > 0 {
for _, opt := range opts {
switch opt {
case DSNRcptNotifyNever:
ns = true
case DSNRcptNotifySuccess:
@ -422,7 +422,7 @@ func WithDSNRcptNotifyType(rno ...DSNRcptNotifyOption) Option {
default:
return ErrInvalidDSNRcptNotifyOption
}
rnol = append(rnol, string(crno))
rcptOpts = append(rcptOpts, string(opt))
}
}
if ns && nns {
@ -430,7 +430,7 @@ func WithDSNRcptNotifyType(rno ...DSNRcptNotifyOption) Option {
}
c.dsn = true
c.dsnrntype = rnol
c.dsnrntype = rcptOpts
return nil
}
}
@ -445,9 +445,9 @@ func WithoutNoop() Option {
}
// WithDialContextFunc overrides the default DialContext for connecting SMTP server
func WithDialContextFunc(f DialContextFunc) Option {
func WithDialContextFunc(dialCtxFunc DialContextFunc) Option {
return func(c *Client) error {
c.dialContextFunc = f
c.dialContextFunc = dialCtxFunc
return nil
}
}
@ -463,8 +463,8 @@ func (c *Client) ServerAddr() string {
}
// SetTLSPolicy overrides the current TLSPolicy with the given TLSPolicy value
func (c *Client) SetTLSPolicy(p TLSPolicy) {
c.tlspolicy = p
func (c *Client) SetTLSPolicy(policy TLSPolicy) {
c.tlspolicy = policy
}
// SetTLSPortPolicy overrides the current TLSPolicy with the given TLSPolicy
@ -474,22 +474,22 @@ func (c *Client) SetTLSPolicy(p TLSPolicy) {
// If the connection fails with TLSOpportunistic, a plaintext connection is
// attempted on port 25 as a fallback.
// NoTLS will allways use port 25.
func (c *Client) SetTLSPortPolicy(p TLSPolicy) {
func (c *Client) SetTLSPortPolicy(policy TLSPolicy) {
c.port = DefaultPortTLS
if p == TLSOpportunistic {
if policy == TLSOpportunistic {
c.fallbackPort = DefaultPort
}
if p == NoTLS {
if policy == NoTLS {
c.port = DefaultPort
}
c.tlspolicy = p
c.tlspolicy = policy
}
// SetSSL tells the Client wether to use SSL or not
func (c *Client) SetSSL(s bool) {
c.ssl = s
func (c *Client) SetSSL(ssl bool) {
c.useSSL = ssl
}
// SetSSLPort tells the Client wether or not to use SSL and fallback.
@ -499,124 +499,124 @@ func (c *Client) SetSSL(s bool) {
// Port 25 is used when SSL is unset (false).
// When the SSL connection fails and fb is set to true,
// the client will attempt to connect on port 25 using plaintext.
func (c *Client) SetSSLPort(ssl bool, fb bool) {
func (c *Client) SetSSLPort(ssl bool, fallback bool) {
c.port = DefaultPort
if ssl {
c.port = DefaultPortSSL
}
c.fallbackPort = 0
if fb {
if fallback {
c.fallbackPort = DefaultPort
}
c.ssl = ssl
c.useSSL = ssl
}
// SetDebugLog tells the Client whether debug logging is enabled or not
func (c *Client) SetDebugLog(v bool) {
c.dl = v
if c.sc != nil {
c.sc.SetDebugLog(v)
func (c *Client) SetDebugLog(val bool) {
c.useDebugLog = val
if c.smtpClient != nil {
c.smtpClient.SetDebugLog(val)
}
}
// SetLogger tells the Client which log.Logger to use
func (c *Client) SetLogger(l log.Logger) {
c.l = l
if c.sc != nil {
c.sc.SetLogger(l)
func (c *Client) SetLogger(logger log.Logger) {
c.logger = logger
if c.smtpClient != nil {
c.smtpClient.SetLogger(logger)
}
}
// SetTLSConfig overrides the current *tls.Config with the given *tls.Config value
func (c *Client) SetTLSConfig(co *tls.Config) error {
if co == nil {
func (c *Client) SetTLSConfig(tlsconfig *tls.Config) error {
if tlsconfig == nil {
return ErrInvalidTLSConfig
}
c.tlsconfig = co
c.tlsconfig = tlsconfig
return nil
}
// SetUsername overrides the current username string with the given value
func (c *Client) SetUsername(u string) {
c.user = u
func (c *Client) SetUsername(username string) {
c.user = username
}
// SetPassword overrides the current password string with the given value
func (c *Client) SetPassword(p string) {
c.pass = p
func (c *Client) SetPassword(password string) {
c.pass = password
}
// SetSMTPAuth overrides the current SMTP AUTH type setting with the given value
func (c *Client) SetSMTPAuth(a SMTPAuthType) {
c.satype = a
func (c *Client) SetSMTPAuth(authtype SMTPAuthType) {
c.smtpAuthType = authtype
}
// SetSMTPAuthCustom overrides the current SMTP AUTH setting with the given custom smtp.Auth
func (c *Client) SetSMTPAuthCustom(sa smtp.Auth) {
c.sa = sa
func (c *Client) SetSMTPAuthCustom(smtpAuth smtp.Auth) {
c.smtpAuth = smtpAuth
}
// setDefaultHelo retrieves the current hostname and sets it as HELO/EHLO hostname
func (c *Client) setDefaultHelo() error {
hn, err := os.Hostname()
hostname, err := os.Hostname()
if err != nil {
return fmt.Errorf("failed cto read local hostname: %w", err)
return fmt.Errorf("failed to read local hostname: %w", err)
}
c.helo = hn
c.helo = hostname
return nil
}
// DialWithContext establishes a connection cto the SMTP server with a given context.Context
func (c *Client) DialWithContext(pc context.Context) error {
ctx, cfn := context.WithDeadline(pc, time.Now().Add(c.cto))
defer cfn()
// DialWithContext establishes a connection to the SMTP server with a given context.Context
func (c *Client) DialWithContext(dialCtx context.Context) error {
ctx, cancel := context.WithDeadline(dialCtx, time.Now().Add(c.connTimeout))
defer cancel()
if c.dialContextFunc == nil {
nd := net.Dialer{}
c.dialContextFunc = nd.DialContext
netDialer := net.Dialer{}
c.dialContextFunc = netDialer.DialContext
if c.ssl {
td := tls.Dialer{NetDialer: &nd, Config: c.tlsconfig}
c.enc = true
c.dialContextFunc = td.DialContext
if c.useSSL {
tlsDialer := tls.Dialer{NetDialer: &netDialer, Config: c.tlsconfig}
c.isEncrypted = true
c.dialContextFunc = tlsDialer.DialContext
}
}
var err error
c.co, err = c.dialContextFunc(ctx, "tcp", c.ServerAddr())
c.connection, err = c.dialContextFunc(ctx, "tcp", c.ServerAddr())
if err != nil && c.fallbackPort != 0 {
// TODO: should we somehow log or append the previous error?
c.co, err = c.dialContextFunc(ctx, "tcp", c.serverFallbackAddr())
c.connection, err = c.dialContextFunc(ctx, "tcp", c.serverFallbackAddr())
}
if err != nil {
return err
}
sc, err := smtp.NewClient(c.co, c.host)
client, err := smtp.NewClient(c.connection, c.host)
if err != nil {
return err
}
if sc == nil {
if client == nil {
return fmt.Errorf("SMTP client is nil")
}
c.sc = sc
c.smtpClient = client
if c.l != nil {
c.sc.SetLogger(c.l)
if c.logger != nil {
c.smtpClient.SetLogger(c.logger)
}
if c.dl {
c.sc.SetDebugLog(true)
if c.useDebugLog {
c.smtpClient.SetDebugLog(true)
}
if err := c.sc.Hello(c.helo); err != nil {
if err = c.smtpClient.Hello(c.helo); err != nil {
return err
}
if err := c.tls(); err != nil {
if err = c.tls(); err != nil {
return err
}
if err := c.auth(); err != nil {
if err = c.auth(); err != nil {
return err
}
@ -628,7 +628,7 @@ func (c *Client) Close() error {
if err := c.checkConn(); err != nil {
return err
}
if err := c.sc.Quit(); err != nil {
if err := c.smtpClient.Quit(); err != nil {
return fmt.Errorf("failed to close SMTP client: %w", err)
}
@ -640,7 +640,7 @@ func (c *Client) Reset() error {
if err := c.checkConn(); err != nil {
return err
}
if err := c.sc.Reset(); err != nil {
if err := c.smtpClient.Reset(); err != nil {
return fmt.Errorf("failed to send RSET to SMTP client: %w", err)
}
@ -649,18 +649,18 @@ func (c *Client) Reset() error {
// DialAndSend establishes a connection to the SMTP server with a
// default context.Background and sends the mail
func (c *Client) DialAndSend(ml ...*Msg) error {
func (c *Client) DialAndSend(messages ...*Msg) error {
ctx := context.Background()
return c.DialAndSendWithContext(ctx, ml...)
return c.DialAndSendWithContext(ctx, messages...)
}
// DialAndSendWithContext establishes a connection to the SMTP server with a
// custom context and sends the mail
func (c *Client) DialAndSendWithContext(ctx context.Context, ml ...*Msg) error {
func (c *Client) DialAndSendWithContext(ctx context.Context, messages ...*Msg) error {
if err := c.DialWithContext(ctx); err != nil {
return fmt.Errorf("dial failed: %w", err)
}
if err := c.Send(ml...); err != nil {
if err := c.Send(messages...); err != nil {
return fmt.Errorf("send failed: %w", err)
}
if err := c.Close(); err != nil {
@ -672,17 +672,17 @@ func (c *Client) DialAndSendWithContext(ctx context.Context, ml ...*Msg) error {
// checkConn makes sure that a required server connection is available and extends the
// connection deadline
func (c *Client) checkConn() error {
if c.co == nil {
if c.connection == nil {
return ErrNoActiveConnection
}
if !c.noNoop {
if err := c.sc.Noop(); err != nil {
if err := c.smtpClient.Noop(); err != nil {
return ErrNoActiveConnection
}
}
if err := c.co.SetDeadline(time.Now().Add(c.cto)); err != nil {
if err := c.connection.SetDeadline(time.Now().Add(c.connTimeout)); err != nil {
return ErrDeadlineExtendFailed
}
return nil
@ -696,30 +696,30 @@ func (c *Client) serverFallbackAddr() string {
// tls tries to make sure that the STARTTLS requirements are satisfied
func (c *Client) tls() error {
if c.co == nil {
if c.connection == nil {
return ErrNoActiveConnection
}
if !c.ssl && c.tlspolicy != NoTLS {
est := false
st, _ := c.sc.Extension("STARTTLS")
if !c.useSSL && c.tlspolicy != NoTLS {
hasStartTLS := false
extension, _ := c.smtpClient.Extension("STARTTLS")
if c.tlspolicy == TLSMandatory {
est = true
if !st {
hasStartTLS = true
if !extension {
return fmt.Errorf("STARTTLS mode set to: %q, but target host does not support STARTTLS",
c.tlspolicy)
}
}
if c.tlspolicy == TLSOpportunistic {
if st {
est = true
if extension {
hasStartTLS = true
}
}
if est {
if err := c.sc.StartTLS(c.tlsconfig); err != nil {
if hasStartTLS {
if err := c.smtpClient.StartTLS(c.tlsconfig); err != nil {
return err
}
}
_, c.enc = c.sc.TLSConnectionState()
_, c.isEncrypted = c.smtpClient.TLSConnectionState()
}
return nil
}
@ -729,40 +729,40 @@ func (c *Client) auth() error {
if err := c.checkConn(); err != nil {
return fmt.Errorf("failed to authenticate: %w", err)
}
if c.sa == nil && c.satype != "" {
sa, sat := c.sc.Extension("AUTH")
if !sa {
if c.smtpAuth == nil && c.smtpAuthType != "" {
hasSMTPAuth, smtpAuthType := c.smtpClient.Extension("AUTH")
if !hasSMTPAuth {
return fmt.Errorf("server does not support SMTP AUTH")
}
switch c.satype {
switch c.smtpAuthType {
case SMTPAuthPlain:
if !strings.Contains(sat, string(SMTPAuthPlain)) {
if !strings.Contains(smtpAuthType, string(SMTPAuthPlain)) {
return ErrPlainAuthNotSupported
}
c.sa = smtp.PlainAuth("", c.user, c.pass, c.host)
c.smtpAuth = smtp.PlainAuth("", c.user, c.pass, c.host)
case SMTPAuthLogin:
if !strings.Contains(sat, string(SMTPAuthLogin)) {
if !strings.Contains(smtpAuthType, string(SMTPAuthLogin)) {
return ErrLoginAuthNotSupported
}
c.sa = smtp.LoginAuth(c.user, c.pass, c.host)
c.smtpAuth = smtp.LoginAuth(c.user, c.pass, c.host)
case SMTPAuthCramMD5:
if !strings.Contains(sat, string(SMTPAuthCramMD5)) {
if !strings.Contains(smtpAuthType, string(SMTPAuthCramMD5)) {
return ErrCramMD5AuthNotSupported
}
c.sa = smtp.CRAMMD5Auth(c.user, c.pass)
c.smtpAuth = smtp.CRAMMD5Auth(c.user, c.pass)
case SMTPAuthXOAUTH2:
if !strings.Contains(sat, string(SMTPAuthXOAUTH2)) {
if !strings.Contains(smtpAuthType, string(SMTPAuthXOAUTH2)) {
return ErrXOauth2AuthNotSupported
}
c.sa = smtp.XOAuth2Auth(c.user, c.pass)
c.smtpAuth = smtp.XOAuth2Auth(c.user, c.pass)
default:
return fmt.Errorf("unsupported SMTP AUTH type %q", c.satype)
return fmt.Errorf("unsupported SMTP AUTH type %q", c.smtpAuthType)
}
}
if c.sa != nil {
if err := c.sc.Auth(c.sa); err != nil {
if c.smtpAuth != nil {
if err := c.smtpClient.Auth(c.smtpAuth); err != nil {
return fmt.Errorf("SMTP AUTH failed: %w", err)
}
}

128
client_119.go
View file

@ -10,123 +10,123 @@ package mail
import "strings"
// Send sends out the mail message
func (c *Client) Send(ml ...*Msg) error {
func (c *Client) Send(messages ...*Msg) error {
if cerr := c.checkConn(); cerr != nil {
return &SendError{Reason: ErrConnCheck, errlist: []error{cerr}, isTemp: isTempError(cerr)}
}
var errs []*SendError
for _, m := range ml {
m.sendError = nil
if m.encoding == NoEncoding {
if ok, _ := c.sc.Extension("8BITMIME"); !ok {
se := &SendError{Reason: ErrNoUnencoded, isTemp: false}
m.sendError = se
errs = append(errs, se)
for _, message := range messages {
message.sendError = nil
if message.encoding == NoEncoding {
if ok, _ := c.smtpClient.Extension("8BITMIME"); !ok {
sendErr := &SendError{Reason: ErrNoUnencoded, isTemp: false}
message.sendError = sendErr
errs = append(errs, sendErr)
continue
}
}
f, err := m.GetSender(false)
from, err := message.GetSender(false)
if err != nil {
se := &SendError{Reason: ErrGetSender, errlist: []error{err}, isTemp: isTempError(err)}
m.sendError = se
errs = append(errs, se)
sendErr := &SendError{Reason: ErrGetSender, errlist: []error{err}, isTemp: isTempError(err)}
message.sendError = sendErr
errs = append(errs, sendErr)
continue
}
rl, err := m.GetRecipients()
rcpts, err := message.GetRecipients()
if err != nil {
se := &SendError{Reason: ErrGetRcpts, errlist: []error{err}, isTemp: isTempError(err)}
m.sendError = se
errs = append(errs, se)
sendErr := &SendError{Reason: ErrGetRcpts, errlist: []error{err}, isTemp: isTempError(err)}
message.sendError = sendErr
errs = append(errs, sendErr)
continue
}
if c.dsn {
if c.dsnmrtype != "" {
c.sc.SetDSNMailReturnOption(string(c.dsnmrtype))
c.smtpClient.SetDSNMailReturnOption(string(c.dsnmrtype))
}
}
if err := c.sc.Mail(f); err != nil {
se := &SendError{Reason: ErrSMTPMailFrom, errlist: []error{err}, isTemp: isTempError(err)}
if reserr := c.sc.Reset(); reserr != nil {
se.errlist = append(se.errlist, reserr)
if err = c.smtpClient.Mail(from); err != nil {
sendErr := &SendError{Reason: ErrSMTPMailFrom, errlist: []error{err}, isTemp: isTempError(err)}
if resetSendErr := c.smtpClient.Reset(); resetSendErr != nil {
sendErr.errlist = append(sendErr.errlist, resetSendErr)
}
m.sendError = se
errs = append(errs, se)
message.sendError = sendErr
errs = append(errs, sendErr)
continue
}
failed := false
rse := &SendError{}
rse.errlist = make([]error, 0)
rse.rcpt = make([]string, 0)
rno := strings.Join(c.dsnrntype, ",")
c.sc.SetDSNRcptNotifyOption(rno)
for _, r := range rl {
if err := c.sc.Rcpt(r); err != nil {
rse.Reason = ErrSMTPRcptTo
rse.errlist = append(rse.errlist, err)
rse.rcpt = append(rse.rcpt, r)
rse.isTemp = isTempError(err)
rcptSendErr := &SendError{}
rcptSendErr.errlist = make([]error, 0)
rcptSendErr.rcpt = make([]string, 0)
rcptNotifyOpt := strings.Join(c.dsnrntype, ",")
c.smtpClient.SetDSNRcptNotifyOption(rcptNotifyOpt)
for _, rcpt := range rcpts {
if err = c.smtpClient.Rcpt(rcpt); err != nil {
rcptSendErr.Reason = ErrSMTPRcptTo
rcptSendErr.errlist = append(rcptSendErr.errlist, err)
rcptSendErr.rcpt = append(rcptSendErr.rcpt, rcpt)
rcptSendErr.isTemp = isTempError(err)
failed = true
}
}
if failed {
if reserr := c.sc.Reset(); reserr != nil {
rse.errlist = append(rse.errlist, err)
if resetSendErr := c.smtpClient.Reset(); resetSendErr != nil {
rcptSendErr.errlist = append(rcptSendErr.errlist, err)
}
m.sendError = rse
errs = append(errs, rse)
message.sendError = rcptSendErr
errs = append(errs, rcptSendErr)
continue
}
w, err := c.sc.Data()
writer, err := c.smtpClient.Data()
if err != nil {
se := &SendError{Reason: ErrSMTPData, errlist: []error{err}, isTemp: isTempError(err)}
m.sendError = se
errs = append(errs, se)
sendErr := &SendError{Reason: ErrSMTPData, errlist: []error{err}, isTemp: isTempError(err)}
message.sendError = sendErr
errs = append(errs, sendErr)
continue
}
_, err = m.WriteTo(w)
_, err = message.WriteTo(writer)
if err != nil {
se := &SendError{Reason: ErrWriteContent, errlist: []error{err}, isTemp: isTempError(err)}
m.sendError = se
errs = append(errs, se)
sendErr := &SendError{Reason: ErrWriteContent, errlist: []error{err}, isTemp: isTempError(err)}
message.sendError = sendErr
errs = append(errs, sendErr)
continue
}
m.isDelivered = true
message.isDelivered = true
if err := w.Close(); err != nil {
se := &SendError{Reason: ErrSMTPDataClose, errlist: []error{err}, isTemp: isTempError(err)}
m.sendError = se
errs = append(errs, se)
if err = writer.Close(); err != nil {
sendErr := &SendError{Reason: ErrSMTPDataClose, errlist: []error{err}, isTemp: isTempError(err)}
message.sendError = sendErr
errs = append(errs, sendErr)
continue
}
if err := c.Reset(); err != nil {
se := &SendError{Reason: ErrSMTPReset, errlist: []error{err}, isTemp: isTempError(err)}
m.sendError = se
errs = append(errs, se)
if err = c.Reset(); err != nil {
sendErr := &SendError{Reason: ErrSMTPReset, errlist: []error{err}, isTemp: isTempError(err)}
message.sendError = sendErr
errs = append(errs, sendErr)
continue
}
if err := c.checkConn(); err != nil {
se := &SendError{Reason: ErrConnCheck, errlist: []error{err}, isTemp: isTempError(err)}
m.sendError = se
errs = append(errs, se)
if err = c.checkConn(); err != nil {
sendErr := &SendError{Reason: ErrConnCheck, errlist: []error{err}, isTemp: isTempError(err)}
message.sendError = sendErr
errs = append(errs, sendErr)
continue
}
}
if len(errs) > 0 {
if len(errs) > 1 {
re := &SendError{Reason: ErrAmbiguous}
returnErr := &SendError{Reason: ErrAmbiguous}
for i := range errs {
re.errlist = append(re.errlist, errs[i].errlist...)
re.rcpt = append(re.rcpt, errs[i].rcpt...)
returnErr.errlist = append(returnErr.errlist, errs[i].errlist...)
returnErr.rcpt = append(returnErr.rcpt, errs[i].rcpt...)
}
// We assume that the isTemp flag from the last error we received should be the
// indicator for the returned isTemp flag as well
re.isTemp = errs[len(errs)-1].isTemp
returnErr.isTemp = errs[len(errs)-1].isTemp
return re
return returnErr
}
return errs[0]
}

102
client_120.go
View file

@ -13,97 +13,97 @@ import (
)
// Send sends out the mail message
func (c *Client) Send(ml ...*Msg) (rerr error) {
func (c *Client) Send(messages ...*Msg) (returnErr error) {
if err := c.checkConn(); err != nil {
rerr = &SendError{Reason: ErrConnCheck, errlist: []error{err}, isTemp: isTempError(err)}
returnErr = &SendError{Reason: ErrConnCheck, errlist: []error{err}, isTemp: isTempError(err)}
return
}
for _, m := range ml {
m.sendError = nil
if m.encoding == NoEncoding {
if ok, _ := c.sc.Extension("8BITMIME"); !ok {
m.sendError = &SendError{Reason: ErrNoUnencoded, isTemp: false}
rerr = errors.Join(rerr, m.sendError)
for _, message := range messages {
message.sendError = nil
if message.encoding == NoEncoding {
if ok, _ := c.smtpClient.Extension("8BITMIME"); !ok {
message.sendError = &SendError{Reason: ErrNoUnencoded, isTemp: false}
returnErr = errors.Join(returnErr, message.sendError)
continue
}
}
f, err := m.GetSender(false)
from, err := message.GetSender(false)
if err != nil {
m.sendError = &SendError{Reason: ErrGetSender, errlist: []error{err}, isTemp: isTempError(err)}
rerr = errors.Join(rerr, m.sendError)
message.sendError = &SendError{Reason: ErrGetSender, errlist: []error{err}, isTemp: isTempError(err)}
returnErr = errors.Join(returnErr, message.sendError)
continue
}
rl, err := m.GetRecipients()
rcpts, err := message.GetRecipients()
if err != nil {
m.sendError = &SendError{Reason: ErrGetRcpts, errlist: []error{err}, isTemp: isTempError(err)}
rerr = errors.Join(rerr, m.sendError)
message.sendError = &SendError{Reason: ErrGetRcpts, errlist: []error{err}, isTemp: isTempError(err)}
returnErr = errors.Join(returnErr, message.sendError)
continue
}
if c.dsn {
if c.dsnmrtype != "" {
c.sc.SetDSNMailReturnOption(string(c.dsnmrtype))
c.smtpClient.SetDSNMailReturnOption(string(c.dsnmrtype))
}
}
if err := c.sc.Mail(f); err != nil {
m.sendError = &SendError{Reason: ErrSMTPMailFrom, errlist: []error{err}, isTemp: isTempError(err)}
rerr = errors.Join(rerr, m.sendError)
if reserr := c.sc.Reset(); reserr != nil {
rerr = errors.Join(rerr, reserr)
if err = c.smtpClient.Mail(from); err != nil {
message.sendError = &SendError{Reason: ErrSMTPMailFrom, errlist: []error{err}, isTemp: isTempError(err)}
returnErr = errors.Join(returnErr, message.sendError)
if resetSendErr := c.smtpClient.Reset(); resetSendErr != nil {
returnErr = errors.Join(returnErr, resetSendErr)
}
continue
}
failed := false
rse := &SendError{}
rse.errlist = make([]error, 0)
rse.rcpt = make([]string, 0)
rno := strings.Join(c.dsnrntype, ",")
c.sc.SetDSNRcptNotifyOption(rno)
for _, r := range rl {
if err := c.sc.Rcpt(r); err != nil {
rse.Reason = ErrSMTPRcptTo
rse.errlist = append(rse.errlist, err)
rse.rcpt = append(rse.rcpt, r)
rse.isTemp = isTempError(err)
rcptSendErr := &SendError{}
rcptSendErr.errlist = make([]error, 0)
rcptSendErr.rcpt = make([]string, 0)
rcptNotifyOpt := strings.Join(c.dsnrntype, ",")
c.smtpClient.SetDSNRcptNotifyOption(rcptNotifyOpt)
for _, rcpt := range rcpts {
if err = c.smtpClient.Rcpt(rcpt); err != nil {
rcptSendErr.Reason = ErrSMTPRcptTo
rcptSendErr.errlist = append(rcptSendErr.errlist, err)
rcptSendErr.rcpt = append(rcptSendErr.rcpt, rcpt)
rcptSendErr.isTemp = isTempError(err)
failed = true
}
}
if failed {
if reserr := c.sc.Reset(); reserr != nil {
rerr = errors.Join(rerr, reserr)
if resetSendErr := c.smtpClient.Reset(); resetSendErr != nil {
returnErr = errors.Join(returnErr, resetSendErr)
}
m.sendError = rse
rerr = errors.Join(rerr, m.sendError)
message.sendError = rcptSendErr
returnErr = errors.Join(returnErr, message.sendError)
continue
}
w, err := c.sc.Data()
writer, err := c.smtpClient.Data()
if err != nil {
m.sendError = &SendError{Reason: ErrSMTPData, errlist: []error{err}, isTemp: isTempError(err)}
rerr = errors.Join(rerr, m.sendError)
message.sendError = &SendError{Reason: ErrSMTPData, errlist: []error{err}, isTemp: isTempError(err)}
returnErr = errors.Join(returnErr, message.sendError)
continue
}
_, err = m.WriteTo(w)
_, err = message.WriteTo(writer)
if err != nil {
m.sendError = &SendError{Reason: ErrWriteContent, errlist: []error{err}, isTemp: isTempError(err)}
rerr = errors.Join(rerr, m.sendError)
message.sendError = &SendError{Reason: ErrWriteContent, errlist: []error{err}, isTemp: isTempError(err)}
returnErr = errors.Join(returnErr, message.sendError)
continue
}
m.isDelivered = true
message.isDelivered = true
if err := w.Close(); err != nil {
m.sendError = &SendError{Reason: ErrSMTPDataClose, errlist: []error{err}, isTemp: isTempError(err)}
rerr = errors.Join(rerr, m.sendError)
if err = writer.Close(); err != nil {
message.sendError = &SendError{Reason: ErrSMTPDataClose, errlist: []error{err}, isTemp: isTempError(err)}
returnErr = errors.Join(returnErr, message.sendError)
continue
}
if err := c.Reset(); err != nil {
m.sendError = &SendError{Reason: ErrSMTPReset, errlist: []error{err}, isTemp: isTempError(err)}
rerr = errors.Join(rerr, m.sendError)
if err = c.Reset(); err != nil {
message.sendError = &SendError{Reason: ErrSMTPReset, errlist: []error{err}, isTemp: isTempError(err)}
returnErr = errors.Join(returnErr, message.sendError)
continue
}
if err := c.checkConn(); err != nil {
m.sendError = &SendError{Reason: ErrConnCheck, errlist: []error{err}, isTemp: isTempError(err)}
rerr = errors.Join(rerr, m.sendError)
if err = c.checkConn(); err != nil {
message.sendError = &SendError{Reason: ErrConnCheck, errlist: []error{err}, isTemp: isTempError(err)}
returnErr = errors.Join(returnErr, message.sendError)
}
}

66
client_test.go
View file

@ -49,9 +49,9 @@ func TestNewClient(t *testing.T) {
if c.host != tt.host {
t.Errorf("failed to create new client. Host expected: %s, got: %s", host, c.host)
}
if c.cto != DefaultTimeout {
if c.connTimeout != DefaultTimeout {
t.Errorf("failed to create new client. Timeout expected: %s, got: %s", DefaultTimeout.String(),
c.cto.String())
c.connTimeout.String())
}
if c.port != DefaultPort {
t.Errorf("failed to create new client. Port expected: %d, got: %d", DefaultPort, c.port)
@ -205,8 +205,8 @@ func TestWithTimeout(t *testing.T) {
t.Errorf("failed to create new client: %s", err)
return
}
if c.cto != tt.want {
t.Errorf("failed to set custom timeout. Want: %d, got: %d", tt.want, c.cto)
if c.connTimeout != tt.want {
t.Errorf("failed to set custom timeout. Want: %d, got: %d", tt.want, c.connTimeout)
}
})
}
@ -345,8 +345,8 @@ func TestSetSSL(t *testing.T) {
return
}
c.SetSSL(tt.value)
if c.ssl != tt.value {
t.Errorf("failed to set SSL setting. Got: %t, want: %t", c.ssl, tt.value)
if c.useSSL != tt.value {
t.Errorf("failed to set SSL setting. Got: %t, want: %t", c.useSSL, tt.value)
}
})
}
@ -374,8 +374,8 @@ func TestClient_SetSSLPort(t *testing.T) {
return
}
c.SetSSLPort(tt.value, tt.fb)
if c.ssl != tt.value {
t.Errorf("failed to set SSL setting. Got: %t, want: %t", c.ssl, tt.value)
if c.useSSL != tt.value {
t.Errorf("failed to set SSL setting. Got: %t, want: %t", c.useSSL, tt.value)
}
if c.port != tt.port {
t.Errorf("failed to set SSLPort, wanted port: %d, got: %d", c.port, tt.port)
@ -460,8 +460,8 @@ func TestSetSMTPAuth(t *testing.T) {
return
}
c.SetSMTPAuth(tt.value)
if string(c.satype) != tt.want {
t.Errorf("failed to set SMTP auth type. Expected %s, got: %s", tt.want, string(c.satype))
if string(c.smtpAuthType) != tt.want {
t.Errorf("failed to set SMTP auth type. Expected %s, got: %s", tt.want, string(c.smtpAuthType))
}
})
}
@ -590,10 +590,10 @@ func TestSetSMTPAuthCustom(t *testing.T) {
return
}
c.SetSMTPAuthCustom(tt.value)
if c.sa == nil {
if c.smtpAuth == nil {
t.Errorf("failed to set custom SMTP auth method. SMTP Auth method is empty")
}
p, _, err := c.sa.Start(&si)
p, _, err := c.smtpAuth.Start(&si)
if err != nil {
t.Errorf("SMTP Auth Start() method returned error: %s", err)
}
@ -615,10 +615,10 @@ func TestClient_DialWithContext(t *testing.T) {
t.Errorf("failed to dial with context: %s", err)
return
}
if c.co == nil {
if c.connection == nil {
t.Errorf("DialWithContext didn't fail but no connection found.")
}
if c.sc == nil {
if c.smtpClient == nil {
t.Errorf("DialWithContext didn't fail but no SMTP client found.")
}
if err := c.Close(); err != nil {
@ -640,10 +640,10 @@ func TestClient_DialWithContext_Fallback(t *testing.T) {
t.Errorf("failed to dial with context: %s", err)
return
}
if c.co == nil {
if c.connection == nil {
t.Errorf("DialWithContext didn't fail but no connection found.")
}
if c.sc == nil {
if c.smtpClient == nil {
t.Errorf("DialWithContext didn't fail but no SMTP client found.")
}
if err := c.Close(); err != nil {
@ -670,10 +670,10 @@ func TestClient_DialWithContext_Debug(t *testing.T) {
t.Errorf("failed to dial with context: %s", err)
return
}
if c.co == nil {
if c.connection == nil {
t.Errorf("DialWithContext didn't fail but no connection found.")
}
if c.sc == nil {
if c.smtpClient == nil {
t.Errorf("DialWithContext didn't fail but no SMTP client found.")
}
c.SetDebugLog(true)
@ -694,10 +694,10 @@ func TestClient_DialWithContext_Debug_custom(t *testing.T) {
t.Errorf("failed to dial with context: %s", err)
return
}
if c.co == nil {
if c.connection == nil {
t.Errorf("DialWithContext didn't fail but no connection found.")
}
if c.sc == nil {
if c.smtpClient == nil {
t.Errorf("DialWithContext didn't fail but no SMTP client found.")
}
c.SetDebugLog(true)
@ -714,7 +714,7 @@ func TestClient_DialWithContextInvalidHost(t *testing.T) {
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
c.co = nil
c.connection = nil
c.host = "invalid.addr"
ctx := context.Background()
if err := c.DialWithContext(ctx); err == nil {
@ -730,7 +730,7 @@ func TestClient_DialWithContextInvalidHELO(t *testing.T) {
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
c.co = nil
c.connection = nil
c.helo = ""
ctx := context.Background()
if err := c.DialWithContext(ctx); err == nil {
@ -762,7 +762,7 @@ func TestClient_checkConn(t *testing.T) {
if err != nil {
t.Skipf("failed to create test client: %s. Skipping tests", err)
}
c.co = nil
c.connection = nil
if err := c.checkConn(); err == nil {
t.Errorf("connCheck() should fail but succeeded")
}
@ -799,10 +799,10 @@ func TestClient_DialWithContextOptions(t *testing.T) {
return
}
if !tt.sf {
if c.co == nil && !tt.sf {
if c.connection == nil && !tt.sf {
t.Errorf("DialWithContext didn't fail but no connection found.")
}
if c.sc == nil && !tt.sf {
if c.smtpClient == nil && !tt.sf {
t.Errorf("DialWithContext didn't fail but no SMTP client found.")
}
if err := c.Reset(); err != nil {
@ -1002,16 +1002,16 @@ func TestClient_DialSendCloseBroken(t *testing.T) {
return
}
if tt.closestart {
_ = c.sc.Close()
_ = c.co.Close()
_ = c.smtpClient.Close()
_ = c.connection.Close()
}
if err := c.Send(m); err != nil && !tt.sf {
t.Errorf("Send() failed: %s", err)
return
}
if tt.closeearly {
_ = c.sc.Close()
_ = c.co.Close()
_ = c.smtpClient.Close()
_ = c.connection.Close()
}
if err := c.Close(); err != nil && !tt.sf {
t.Errorf("Close() failed: %s", err)
@ -1062,16 +1062,16 @@ func TestClient_DialSendCloseBrokenWithDSN(t *testing.T) {
return
}
if tt.closestart {
_ = c.sc.Close()
_ = c.co.Close()
_ = c.smtpClient.Close()
_ = c.connection.Close()
}
if err := c.Send(m); err != nil && !tt.sf {
t.Errorf("Send() failed: %s", err)
return
}
if tt.closeearly {
_ = c.sc.Close()
_ = c.co.Close()
_ = c.smtpClient.Close()
_ = c.connection.Close()
}
if err := c.Close(); err != nil && !tt.sf {
t.Errorf("Close() failed: %s", err)

26
file.go
View file

@ -23,17 +23,17 @@ type File struct {
}
// WithFileName sets the filename of the File
func WithFileName(n string) FileOption {
func WithFileName(name string) FileOption {
return func(f *File) {
f.Name = n
f.Name = name
}
}
// WithFileDescription sets an optional file description of the File that will be
// added as Content-Description part
func WithFileDescription(d string) FileOption {
func WithFileDescription(description string) FileOption {
return func(f *File) {
f.Desc = d
f.Desc = description
}
}
@ -41,12 +41,12 @@ func WithFileDescription(d string) FileOption {
// Base64 encoding but there might be exceptions, where this might come handy.
// Please note that quoted-printable should never be used for attachments/embeds. If this
// is provided as argument, the function will automatically override back to Base64
func WithFileEncoding(e Encoding) FileOption {
func WithFileEncoding(encoding Encoding) FileOption {
return func(f *File) {
if e == EncodingQP {
if encoding == EncodingQP {
return
}
f.Enc = e
f.Enc = encoding
}
}
@ -56,19 +56,19 @@ func WithFileEncoding(e Encoding) FileOption {
// could not be guessed. In some cases, however, it might be needed to force
// this to a specific type. For such situations this override method can
// be used
func WithFileContentType(t ContentType) FileOption {
func WithFileContentType(contentType ContentType) FileOption {
return func(f *File) {
f.ContentType = t
f.ContentType = contentType
}
}
// setHeader sets header fields to a File
func (f *File) setHeader(h Header, v string) {
f.Header.Set(string(h), v)
func (f *File) setHeader(header Header, value string) {
f.Header.Set(string(header), value)
}
// getHeader return header fields of a File
func (f *File) getHeader(h Header) (string, bool) {
v := f.Header.Get(string(h))
func (f *File) getHeader(header Header) (string, bool) {
v := f.Header.Get(string(header))
return v, v != ""
}

64
log/jsonlog.go
View file

@ -15,68 +15,68 @@ import (
// JSONlog is the default structured JSON logger that satisfies the Logger interface
type JSONlog struct {
l Level
level Level
log *slog.Logger
}
// NewJSON returns a new JSONlog type that satisfies the Logger interface
func NewJSON(o io.Writer, l Level) *JSONlog {
lo := slog.HandlerOptions{}
switch l {
func NewJSON(output io.Writer, level Level) *JSONlog {
logOpts := slog.HandlerOptions{}
switch level {
case LevelDebug:
lo.Level = slog.LevelDebug
logOpts.Level = slog.LevelDebug
case LevelInfo:
lo.Level = slog.LevelInfo
logOpts.Level = slog.LevelInfo
case LevelWarn:
lo.Level = slog.LevelWarn
logOpts.Level = slog.LevelWarn
case LevelError:
lo.Level = slog.LevelError
logOpts.Level = slog.LevelError
default:
lo.Level = slog.LevelDebug
logOpts.Level = slog.LevelDebug
}
lh := slog.NewJSONHandler(o, &lo)
logHandler := slog.NewJSONHandler(output, &logOpts)
return &JSONlog{
l: l,
log: slog.New(lh),
level: level,
log: slog.New(logHandler),
}
}
// Debugf logs a debug message via the structured JSON logger
func (l *JSONlog) Debugf(lo Log) {
if l.l >= LevelDebug {
func (l *JSONlog) Debugf(log Log) {
if l.level >= LevelDebug {
l.log.WithGroup(DirString).With(
slog.String(DirFromString, lo.directionFrom()),
slog.String(DirToString, lo.directionTo()),
).Debug(fmt.Sprintf(lo.Format, lo.Messages...))
slog.String(DirFromString, log.directionFrom()),
slog.String(DirToString, log.directionTo()),
).Debug(fmt.Sprintf(log.Format, log.Messages...))
}
}
// Infof logs a info message via the structured JSON logger
func (l *JSONlog) Infof(lo Log) {
if l.l >= LevelInfo {
func (l *JSONlog) Infof(log Log) {
if l.level >= LevelInfo {
l.log.WithGroup(DirString).With(
slog.String(DirFromString, lo.directionFrom()),
slog.String(DirToString, lo.directionTo()),
).Info(fmt.Sprintf(lo.Format, lo.Messages...))
slog.String(DirFromString, log.directionFrom()),
slog.String(DirToString, log.directionTo()),
).Info(fmt.Sprintf(log.Format, log.Messages...))
}
}
// Warnf logs a warn message via the structured JSON logger
func (l *JSONlog) Warnf(lo Log) {
if l.l >= LevelWarn {
func (l *JSONlog) Warnf(log Log) {
if l.level >= LevelWarn {
l.log.WithGroup(DirString).With(
slog.String(DirFromString, lo.directionFrom()),
slog.String(DirToString, lo.directionTo()),
).Warn(fmt.Sprintf(lo.Format, lo.Messages...))
slog.String(DirFromString, log.directionFrom()),
slog.String(DirToString, log.directionTo()),
).Warn(fmt.Sprintf(log.Format, log.Messages...))
}
}
// Errorf logs a warn message via the structured JSON logger
func (l *JSONlog) Errorf(lo Log) {
if l.l >= LevelError {
func (l *JSONlog) Errorf(log Log) {
if l.level >= LevelError {
l.log.WithGroup(DirString).With(
slog.String(DirFromString, lo.directionFrom()),
slog.String(DirToString, lo.directionTo()),
).Error(fmt.Sprintf(lo.Format, lo.Messages...))
slog.String(DirFromString, log.directionFrom()),
slog.String(DirToString, log.directionTo()),
).Error(fmt.Sprintf(log.Format, log.Messages...))
}
}

14
log/jsonlog_test.go
View file

@ -30,8 +30,8 @@ type jsonDir struct {
func TestNewJSON(t *testing.T) {
var b bytes.Buffer
l := NewJSON(&b, LevelDebug)
if l.l != LevelDebug {
t.Error("Expected level to be LevelDebug, got ", l.l)
if l.level != LevelDebug {
t.Error("Expected level to be LevelDebug, got ", l.level)
}
if l.log == nil {
t.Error("logger not initialized")
@ -81,7 +81,7 @@ func TestJSONDebugf(t *testing.T) {
}
b.Reset()
l.l = LevelInfo
l.level = LevelInfo
l.Debugf(Log{Direction: DirServerToClient, Format: "test %s", Messages: []interface{}{"foo"}})
if b.String() != "" {
t.Error("Debug message was not expected to be logged")
@ -131,7 +131,7 @@ func TestJSONDebugf_WithDefault(t *testing.T) {
}
b.Reset()
l.l = LevelInfo
l.level = LevelInfo
l.Debugf(Log{Direction: DirServerToClient, Format: "test %s", Messages: []interface{}{"foo"}})
if b.String() != "" {
t.Error("Debug message was not expected to be logged")
@ -181,7 +181,7 @@ func TestJSONInfof(t *testing.T) {
}
b.Reset()
l.l = LevelWarn
l.level = LevelWarn
l.Infof(Log{Direction: DirServerToClient, Format: "test %s", Messages: []interface{}{"foo"}})
if b.String() != "" {
t.Error("Info message was not expected to be logged")
@ -231,7 +231,7 @@ func TestJSONWarnf(t *testing.T) {
}
b.Reset()
l.l = LevelError
l.level = LevelError
l.Warnf(Log{Direction: DirServerToClient, Format: "test %s", Messages: []interface{}{"foo"}})
if b.String() != "" {
t.Error("Warn message was not expected to be logged")
@ -281,7 +281,7 @@ func TestJSONErrorf(t *testing.T) {
}
b.Reset()
l.l = -99
l.level = -99
l.Errorf(Log{Direction: DirServerToClient, Format: "test %s", Messages: []interface{}{"foo"}})
if b.String() != "" {
t.Error("Error message was not expected to be logged")

46
log/stdlog.go
View file

@ -12,7 +12,7 @@ import (
// Stdlog is the default logger that satisfies the Logger interface
type Stdlog struct {
l Level
level Level
err *log.Logger
warn *log.Logger
info *log.Logger
@ -24,45 +24,45 @@ type Stdlog struct {
const CallDepth = 2
// New returns a new Stdlog type that satisfies the Logger interface
func New(o io.Writer, l Level) *Stdlog {
func New(output io.Writer, level Level) *Stdlog {
lf := log.Lmsgprefix | log.LstdFlags
return &Stdlog{
l: l,
err: log.New(o, "ERROR: ", lf),
warn: log.New(o, " WARN: ", lf),
info: log.New(o, " INFO: ", lf),
debug: log.New(o, "DEBUG: ", lf),
level: level,
err: log.New(output, "ERROR: ", lf),
warn: log.New(output, " WARN: ", lf),
info: log.New(output, " INFO: ", lf),
debug: log.New(output, "DEBUG: ", lf),
}
}
// Debugf performs a Printf() on the debug logger
func (l *Stdlog) Debugf(lo Log) {
if l.l >= LevelDebug {
f := fmt.Sprintf("%s %s", lo.directionPrefix(), lo.Format)
_ = l.debug.Output(CallDepth, fmt.Sprintf(f, lo.Messages...))
func (l *Stdlog) Debugf(log Log) {
if l.level >= LevelDebug {
format := fmt.Sprintf("%s %s", log.directionPrefix(), log.Format)
_ = l.debug.Output(CallDepth, fmt.Sprintf(format, log.Messages...))
}
}
// Infof performs a Printf() on the info logger
func (l *Stdlog) Infof(lo Log) {
if l.l >= LevelInfo {
f := fmt.Sprintf("%s %s", lo.directionPrefix(), lo.Format)
_ = l.info.Output(CallDepth, fmt.Sprintf(f, lo.Messages...))
func (l *Stdlog) Infof(log Log) {
if l.level >= LevelInfo {
format := fmt.Sprintf("%s %s", log.directionPrefix(), log.Format)
_ = l.info.Output(CallDepth, fmt.Sprintf(format, log.Messages...))
}
}
// Warnf performs a Printf() on the warn logger
func (l *Stdlog) Warnf(lo Log) {
if l.l >= LevelWarn {
f := fmt.Sprintf("%s %s", lo.directionPrefix(), lo.Format)
_ = l.warn.Output(CallDepth, fmt.Sprintf(f, lo.Messages...))
func (l *Stdlog) Warnf(log Log) {
if l.level >= LevelWarn {
format := fmt.Sprintf("%s %s", log.directionPrefix(), log.Format)
_ = l.warn.Output(CallDepth, fmt.Sprintf(format, log.Messages...))
}
}
// Errorf performs a Printf() on the error logger
func (l *Stdlog) Errorf(lo Log) {
if l.l >= LevelError {
f := fmt.Sprintf("%s %s", lo.directionPrefix(), lo.Format)
_ = l.err.Output(CallDepth, fmt.Sprintf(f, lo.Messages...))
func (l *Stdlog) Errorf(log Log) {
if l.level >= LevelError {
format := fmt.Sprintf("%s %s", log.directionPrefix(), log.Format)
_ = l.err.Output(CallDepth, fmt.Sprintf(format, log.Messages...))
}
}

12
log/stdlog_test.go
View file

@ -13,8 +13,8 @@ import (
func TestNew(t *testing.T) {
var b bytes.Buffer
l := New(&b, LevelDebug)
if l.l != LevelDebug {
t.Error("Expected level to be LevelDebug, got ", l.l)
if l.level != LevelDebug {
t.Error("Expected level to be LevelDebug, got ", l.level)
}
if l.err == nil || l.warn == nil || l.info == nil || l.debug == nil {
t.Error("Loggers not initialized")
@ -37,7 +37,7 @@ func TestDebugf(t *testing.T) {
}
b.Reset()
l.l = LevelInfo
l.level = LevelInfo
l.Debugf(Log{Direction: DirServerToClient, Format: "test %s", Messages: []interface{}{"foo"}})
if b.String() != "" {
t.Error("Debug message was not expected to be logged")
@ -60,7 +60,7 @@ func TestInfof(t *testing.T) {
}
b.Reset()
l.l = LevelWarn
l.level = LevelWarn
l.Infof(Log{Direction: DirServerToClient, Format: "test %s", Messages: []interface{}{"foo"}})
if b.String() != "" {
t.Error("Info message was not expected to be logged")
@ -83,7 +83,7 @@ func TestWarnf(t *testing.T) {
}
b.Reset()
l.l = LevelError
l.level = LevelError
l.Warnf(Log{Direction: DirServerToClient, Format: "test %s", Messages: []interface{}{"foo"}})
if b.String() != "" {
t.Error("Warn message was not expected to be logged")
@ -106,7 +106,7 @@ func TestErrorf(t *testing.T) {
}
b.Reset()
l.l = LevelError - 1
l.level = LevelError - 1
l.Errorf(Log{Direction: DirServerToClient, Format: "test %s", Messages: []interface{}{"foo"}})
if b.String() != "" {
t.Error("Error message was not expected to be logged")

751
msg.go
View file

File diff suppressed because it is too large Load diff

14
msg_test.go
View file

@ -1251,7 +1251,7 @@ func TestMsg_SetBodyString(t *testing.T) {
}
part := m.parts[0]
res := bytes.Buffer{}
if _, err := part.w(&res); err != nil && !tt.sf {
if _, err := part.writeFunc(&res); err != nil && !tt.sf {
t.Errorf("WriteFunc of part failed: %s", err)
}
if res.String() != tt.want {
@ -1286,7 +1286,7 @@ func TestMsg_AddAlternativeString(t *testing.T) {
}
apart := m.parts[1]
res := bytes.Buffer{}
if _, err := apart.w(&res); err != nil && !tt.sf {
if _, err := apart.writeFunc(&res); err != nil && !tt.sf {
t.Errorf("WriteFunc of part failed: %s", err)
}
if res.String() != tt.want {
@ -3174,7 +3174,7 @@ func TestMsg_checkUserAgent(t *testing.T) {
{
name: "check default user agent",
noDefaultUserAgent: false,
wantUserAgent: "go-mail v0.4.1 // https://github.com/wneessen/go-mail",
wantUserAgent: fmt.Sprintf("go-mail v%s // https://github.com/wneessen/go-mail", VERSION),
sf: false,
},
{
@ -3211,3 +3211,11 @@ func TestMsg_checkUserAgent(t *testing.T) {
})
}
}
// TestNewMsgWithMIMEVersion tests WithMIMEVersion and Msg.SetMIMEVersion
func TestNewMsgWithNoDefaultUserAgent(t *testing.T) {
m := NewMsg(WithNoDefaultUserAgent())
if m.noDefaultUserAgent != true {
t.Errorf("WithNoDefaultUserAgent() failed. Expected: %t, got: %t", true, false)
}
}

349
msgwriter.go
View file

@ -35,237 +35,241 @@ const DoubleNewLine = "\r\n\r\n"
// msgWriter handles the I/O to the io.WriteCloser of the SMTP client
type msgWriter struct {
c Charset
d int8
en mime.WordEncoder
bytesWritten int64
charset Charset
depth int8
encoder mime.WordEncoder
err error
mpw [3]*multipart.Writer
n int64
pw io.Writer
w io.Writer
multiPartWriter [3]*multipart.Writer
partWriter io.Writer
writer io.Writer
}
// Write implements the io.Writer interface for msgWriter
func (mw *msgWriter) Write(p []byte) (int, error) {
func (mw *msgWriter) Write(payload []byte) (int, error) {
if mw.err != nil {
return 0, fmt.Errorf("failed to write due to previous error: %w", mw.err)
}
var n int
n, mw.err = mw.w.Write(p)
mw.n += int64(n)
n, mw.err = mw.writer.Write(payload)
mw.bytesWritten += int64(n)
return n, mw.err
}
// writeMsg formats the message and sends it to its io.Writer
func (mw *msgWriter) writeMsg(m *Msg) {
m.addDefaultHeader()
m.checkUserAgent()
mw.writeGenHeader(m)
mw.writePreformattedGenHeader(m)
func (mw *msgWriter) writeMsg(msg *Msg) {
msg.addDefaultHeader()
msg.checkUserAgent()
mw.writeGenHeader(msg)
mw.writePreformattedGenHeader(msg)
// Set the FROM header (or envelope FROM if FROM is empty)
hf := true
f, ok := m.addrHeader[HeaderFrom]
if !ok || (len(f) == 0 || f == nil) {
f, ok = m.addrHeader[HeaderEnvelopeFrom]
if !ok || (len(f) == 0 || f == nil) {
hf = false
hasFrom := true
from, ok := msg.addrHeader[HeaderFrom]
if !ok || (len(from) == 0 || from == nil) {
from, ok = msg.addrHeader[HeaderEnvelopeFrom]
if !ok || (len(from) == 0 || from == nil) {
hasFrom = false
}
}
if hf && (len(f) > 0 && f[0] != nil) {
mw.writeHeader(Header(HeaderFrom), f[0].String())
if hasFrom && (len(from) > 0 && from[0] != nil) {
mw.writeHeader(Header(HeaderFrom), from[0].String())
}
// Set the rest of the address headers
for _, t := range []AddrHeader{HeaderTo, HeaderCc} {
if al, ok := m.addrHeader[t]; ok {
var v []string
for _, a := range al {
v = append(v, a.String())
for _, to := range []AddrHeader{HeaderTo, HeaderCc} {
if addresses, ok := msg.addrHeader[to]; ok {
var val []string
for _, addr := range addresses {
val = append(val, addr.String())
}
mw.writeHeader(Header(t), v...)
mw.writeHeader(Header(to), val...)
}
}
if m.hasMixed() {
mw.startMP("mixed", m.boundary)
if msg.hasMixed() {
mw.startMP("mixed", msg.boundary)
mw.writeString(DoubleNewLine)
}
if m.hasRelated() {
mw.startMP("related", m.boundary)
if msg.hasRelated() {
mw.startMP("related", msg.boundary)
mw.writeString(DoubleNewLine)
}
if m.hasAlt() {
mw.startMP(MIMEAlternative, m.boundary)
if msg.hasAlt() {
mw.startMP(MIMEAlternative, msg.boundary)
mw.writeString(DoubleNewLine)
}
if m.hasPGPType() {
switch m.pgptype {
if msg.hasPGPType() {
switch msg.pgptype {
case PGPEncrypt:
mw.startMP(`encrypted; protocol="application/pgp-encrypted"`, m.boundary)
mw.startMP(`encrypted; protocol="application/pgp-encrypted"`,
msg.boundary)
case PGPSignature:
mw.startMP(`signed; protocol="application/pgp-signature";`, m.boundary)
mw.startMP(`signed; protocol="application/pgp-signature";`,
msg.boundary)
default:
}
mw.writeString(DoubleNewLine)
}
for _, p := range m.parts {
if !p.del {
mw.writePart(p, m.charset)
for _, part := range msg.parts {
if !part.isDeleted {
mw.writePart(part, msg.charset)
}
}
if m.hasAlt() {
if msg.hasAlt() {
mw.stopMP()
}
// Add embeds
mw.addFiles(m.embeds, false)
if m.hasRelated() {
mw.addFiles(msg.embeds, false)
if msg.hasRelated() {
mw.stopMP()
}
// Add attachments
mw.addFiles(m.attachments, true)
if m.hasMixed() {
mw.addFiles(msg.attachments, true)
if msg.hasMixed() {
mw.stopMP()
}
}
// writeGenHeader writes out all generic headers to the msgWriter
func (mw *msgWriter) writeGenHeader(m *Msg) {
gk := make([]string, 0, len(m.genHeader))
for k := range m.genHeader {
gk = append(gk, string(k))
func (mw *msgWriter) writeGenHeader(msg *Msg) {
keys := make([]string, 0, len(msg.genHeader))
for key := range msg.genHeader {
keys = append(keys, string(key))
}
sort.Strings(gk)
for _, k := range gk {
mw.writeHeader(Header(k), m.genHeader[Header(k)]...)
sort.Strings(keys)
for _, key := range keys {
mw.writeHeader(Header(key), msg.genHeader[Header(key)]...)
}
}
// writePreformatedHeader writes out all preformated generic headers to the msgWriter
func (mw *msgWriter) writePreformattedGenHeader(m *Msg) {
for k, v := range m.preformHeader {
mw.writeString(fmt.Sprintf("%s: %s%s", k, v, SingleNewLine))
func (mw *msgWriter) writePreformattedGenHeader(msg *Msg) {
for key, val := range msg.preformHeader {
mw.writeString(fmt.Sprintf("%s: %s%s", key, val, SingleNewLine))
}
}
// startMP writes a multipart beginning
func (mw *msgWriter) startMP(mt MIMEType, b string) {
mp := multipart.NewWriter(mw)
if b != "" {
mw.err = mp.SetBoundary(b)
func (mw *msgWriter) startMP(mimeType MIMEType, boundary string) {
multiPartWriter := multipart.NewWriter(mw)
if boundary != "" {
mw.err = multiPartWriter.SetBoundary(boundary)
}
ct := fmt.Sprintf("multipart/%s;\r\n boundary=%s", mt, mp.Boundary())
mw.mpw[mw.d] = mp
contentType := fmt.Sprintf("multipart/%s;\r\n boundary=%s", mimeType,
multiPartWriter.Boundary())
mw.multiPartWriter[mw.depth] = multiPartWriter
if mw.d == 0 {
mw.writeString(fmt.Sprintf("%s: %s", HeaderContentType, ct))
if mw.depth == 0 {
mw.writeString(fmt.Sprintf("%s: %s", HeaderContentType, contentType))
}
if mw.d > 0 {
mw.newPart(map[string][]string{"Content-Type": {ct}})
if mw.depth > 0 {
mw.newPart(map[string][]string{"Content-Type": {contentType}})
}
mw.d++
mw.depth++
}
// stopMP closes the multipart
func (mw *msgWriter) stopMP() {
if mw.d > 0 {
mw.err = mw.mpw[mw.d-1].Close()
mw.d--
if mw.depth > 0 {
mw.err = mw.multiPartWriter[mw.depth-1].Close()
mw.depth--
}
}
// addFiles adds the attachments/embeds file content to the mail body
func (mw *msgWriter) addFiles(fl []*File, a bool) {
for _, f := range fl {
e := EncodingB64
if _, ok := f.getHeader(HeaderContentType); !ok {
mt := mime.TypeByExtension(filepath.Ext(f.Name))
if mt == "" {
mt = "application/octet-stream"
func (mw *msgWriter) addFiles(files []*File, isAttachment bool) {
for _, file := range files {
encoding := EncodingB64
if _, ok := file.getHeader(HeaderContentType); !ok {
mimeType := mime.TypeByExtension(filepath.Ext(file.Name))
if mimeType == "" {
mimeType = "application/octet-stream"
}
if f.ContentType != "" {
mt = string(f.ContentType)
if file.ContentType != "" {
mimeType = string(file.ContentType)
}
f.setHeader(HeaderContentType, fmt.Sprintf(`%s; name="%s"`, mt,
mw.en.Encode(mw.c.String(), f.Name)))
file.setHeader(HeaderContentType, fmt.Sprintf(`%s; name="%s"`, mimeType,
mw.encoder.Encode(mw.charset.String(), file.Name)))
}
if _, ok := f.getHeader(HeaderContentTransferEnc); !ok {
if f.Enc != "" {
e = f.Enc
if _, ok := file.getHeader(HeaderContentTransferEnc); !ok {
if file.Enc != "" {
encoding = file.Enc
}
f.setHeader(HeaderContentTransferEnc, string(e))
file.setHeader(HeaderContentTransferEnc, string(encoding))
}
if f.Desc != "" {
if _, ok := f.getHeader(HeaderContentDescription); !ok {
f.setHeader(HeaderContentDescription, f.Desc)
if file.Desc != "" {
if _, ok := file.getHeader(HeaderContentDescription); !ok {
file.setHeader(HeaderContentDescription, file.Desc)
}
}
if _, ok := f.getHeader(HeaderContentDisposition); !ok {
d := "inline"
if a {
d = "attachment"
if _, ok := file.getHeader(HeaderContentDisposition); !ok {
disposition := "inline"
if isAttachment {
disposition = "attachment"
}
f.setHeader(HeaderContentDisposition, fmt.Sprintf(`%s; filename="%s"`, d,
mw.en.Encode(mw.c.String(), f.Name)))
file.setHeader(HeaderContentDisposition, fmt.Sprintf(`%s; filename="%s"`,
disposition, mw.encoder.Encode(mw.charset.String(), file.Name)))
}
if !a {
if _, ok := f.getHeader(HeaderContentID); !ok {
f.setHeader(HeaderContentID, fmt.Sprintf("<%s>", f.Name))
if !isAttachment {
if _, ok := file.getHeader(HeaderContentID); !ok {
file.setHeader(HeaderContentID, fmt.Sprintf("<%s>", file.Name))
}
}
if mw.d == 0 {
for h, v := range f.Header {
mw.writeHeader(Header(h), v...)
if mw.depth == 0 {
for header, val := range file.Header {
mw.writeHeader(Header(header), val...)
}
mw.writeString(SingleNewLine)
}
if mw.d > 0 {
mw.newPart(f.Header)
if mw.depth > 0 {
mw.newPart(file.Header)
}
if mw.err == nil {
mw.writeBody(f.Writer, e)
mw.writeBody(file.Writer, encoding)
}
}
}
// newPart creates a new MIME multipart io.Writer and sets the partwriter to it
func (mw *msgWriter) newPart(h map[string][]string) {
mw.pw, mw.err = mw.mpw[mw.d-1].CreatePart(h)
func (mw *msgWriter) newPart(header map[string][]string) {
mw.partWriter, mw.err = mw.multiPartWriter[mw.depth-1].CreatePart(header)
}
// writePart writes the corresponding part to the Msg body
func (mw *msgWriter) writePart(p *Part, cs Charset) {
pcs := p.cset
if pcs.String() == "" {
pcs = cs
func (mw *msgWriter) writePart(part *Part, charset Charset) {
partCharset := part.charset
if partCharset.String() == "" {
partCharset = charset
}
ct := fmt.Sprintf("%s; charset=%s", p.ctype, pcs)
cte := p.enc.String()
if mw.d == 0 {
mw.writeHeader(HeaderContentType, ct)
mw.writeHeader(HeaderContentTransferEnc, cte)
contentType := fmt.Sprintf("%s; charset=%s", part.contentType, partCharset)
contentTransferEnc := part.encoding.String()
if mw.depth == 0 {
mw.writeHeader(HeaderContentType, contentType)
mw.writeHeader(HeaderContentTransferEnc, contentTransferEnc)
mw.writeString(SingleNewLine)
}
if mw.d > 0 {
mh := textproto.MIMEHeader{}
if p.desc != "" {
mh.Add(string(HeaderContentDescription), p.desc)
if mw.depth > 0 {
mimeHeader := textproto.MIMEHeader{}
if part.description != "" {
mimeHeader.Add(string(HeaderContentDescription), part.description)
}
mh.Add(string(HeaderContentType), ct)
mh.Add(string(HeaderContentTransferEnc), cte)
mw.newPart(mh)
mimeHeader.Add(string(HeaderContentType), contentType)
mimeHeader.Add(string(HeaderContentTransferEnc), contentTransferEnc)
mw.newPart(mimeHeader)
}
mw.writeBody(p.w, p.enc)
mw.writeBody(part.writeFunc, part.encoding)
}
// writeString writes a string into the msgWriter's io.Writer interface
@ -274,102 +278,103 @@ func (mw *msgWriter) writeString(s string) {
return
}
var n int
n, mw.err = io.WriteString(mw.w, s)
mw.n += int64(n)
n, mw.err = io.WriteString(mw.writer, s)
mw.bytesWritten += int64(n)
}
// writeHeader writes a header into the msgWriter's io.Writer
func (mw *msgWriter) writeHeader(k Header, vl ...string) {
wbuf := bytes.Buffer{}
cl := MaxHeaderLength - 2
wbuf.WriteString(string(k))
cl -= len(k)
if len(vl) == 0 {
wbuf.WriteString(":\r\n")
func (mw *msgWriter) writeHeader(key Header, values ...string) {
buffer := strings.Builder{}
charLength := MaxHeaderLength - 2
buffer.WriteString(string(key))
charLength -= len(key)
if len(values) == 0 {
buffer.WriteString(":\r\n")
return
}
wbuf.WriteString(": ")
cl -= 2
buffer.WriteString(": ")
charLength -= 2
fs := strings.Join(vl, ", ")
sfs := strings.Split(fs, " ")
for i, v := range sfs {
if cl-len(v) <= 1 {
wbuf.WriteString(fmt.Sprintf("%s ", SingleNewLine))
cl = MaxHeaderLength - 3
fullValueStr := strings.Join(values, ", ")
words := strings.Split(fullValueStr, " ")
for i, val := range words {
if charLength-len(val) <= 1 {
buffer.WriteString(fmt.Sprintf("%s ", SingleNewLine))
charLength = MaxHeaderLength - 3
}
wbuf.WriteString(v)
if i < len(sfs)-1 {
wbuf.WriteString(" ")
cl -= 1
buffer.WriteString(val)
if i < len(words)-1 {
buffer.WriteString(" ")
charLength -= 1
}
cl -= len(v)
charLength -= len(val)
}
bufs := wbuf.String()
bufs = strings.ReplaceAll(bufs, fmt.Sprintf(" %s", SingleNewLine), SingleNewLine)
mw.writeString(bufs)
bufferString := buffer.String()
bufferString = strings.ReplaceAll(bufferString, fmt.Sprintf(" %s", SingleNewLine),
SingleNewLine)
mw.writeString(bufferString)
mw.writeString("\r\n")
}
// writeBody writes an io.Reader into an io.Writer using provided Encoding
func (mw *msgWriter) writeBody(f func(io.Writer) (int64, error), e Encoding) {
var w io.Writer
var ew io.WriteCloser
func (mw *msgWriter) writeBody(writeFunc func(io.Writer) (int64, error), encoding Encoding) {
var writer io.Writer
var encodedWriter io.WriteCloser
var n int64
var err error
if mw.d == 0 {
w = mw.w
if mw.depth == 0 {
writer = mw.writer
}
if mw.d > 0 {
w = mw.pw
if mw.depth > 0 {
writer = mw.partWriter
}
wbuf := bytes.Buffer{}
lb := Base64LineBreaker{}
lb.out = &wbuf
writeBuffer := bytes.Buffer{}
lineBreaker := Base64LineBreaker{}
lineBreaker.out = &writeBuffer
switch e {
switch encoding {
case EncodingQP:
ew = quotedprintable.NewWriter(&wbuf)
encodedWriter = quotedprintable.NewWriter(&writeBuffer)
case EncodingB64:
ew = base64.NewEncoder(base64.StdEncoding, &lb)
encodedWriter = base64.NewEncoder(base64.StdEncoding, &lineBreaker)
case NoEncoding:
_, err = f(&wbuf)
_, err = writeFunc(&writeBuffer)
if err != nil {
mw.err = fmt.Errorf("bodyWriter function: %w", err)
}
n, err = io.Copy(w, &wbuf)
n, err = io.Copy(writer, &writeBuffer)
if err != nil && mw.err == nil {
mw.err = fmt.Errorf("bodyWriter io.Copy: %w", err)
}
if mw.d == 0 {
mw.n += n
if mw.depth == 0 {
mw.bytesWritten += n
}
return
default:
ew = quotedprintable.NewWriter(w)
encodedWriter = quotedprintable.NewWriter(writer)
}
_, err = f(ew)
_, err = writeFunc(encodedWriter)
if err != nil {
mw.err = fmt.Errorf("bodyWriter function: %w", err)
}
err = ew.Close()
err = encodedWriter.Close()
if err != nil && mw.err == nil {
mw.err = fmt.Errorf("bodyWriter close encoded writer: %w", err)
}
err = lb.Close()
err = lineBreaker.Close()
if err != nil && mw.err == nil {
mw.err = fmt.Errorf("bodyWriter close linebreaker: %w", err)
}
n, err = io.Copy(w, &wbuf)
n, err = io.Copy(writer, &writeBuffer)
if err != nil && mw.err == nil {
mw.err = fmt.Errorf("bodyWriter io.Copy: %w", err)
}
// Since the part writer uses the WriteTo() method, we don't need to add the
// bytes twice
if mw.d == 0 {
mw.n += n
if mw.depth == 0 {
mw.bytesWritten += n
}
}

8
msgwriter_test.go
View file

@ -28,7 +28,7 @@ func (bw *brokenWriter) Write([]byte) (int, error) {
// TestMsgWriter_Write tests the WriteTo() method of the msgWriter
func TestMsgWriter_Write(t *testing.T) {
bw := &brokenWriter{}
mw := &msgWriter{w: bw, c: CharsetUTF8, en: mime.QEncoding}
mw := &msgWriter{writer: bw, charset: CharsetUTF8, encoder: mime.QEncoding}
_, err := mw.Write([]byte("test"))
if err == nil {
t.Errorf("msgWriter WriteTo() with brokenWriter should fail, but didn't")
@ -55,7 +55,7 @@ func TestMsgWriter_writeMsg(t *testing.T) {
m.SetBodyString(TypeTextPlain, "This is the body")
m.AddAlternativeString(TypeTextHTML, "This is the alternative body")
buf := bytes.Buffer{}
mw := &msgWriter{w: &buf, c: CharsetUTF8, en: mime.QEncoding}
mw := &msgWriter{writer: &buf, charset: CharsetUTF8, encoder: mime.QEncoding}
mw.writeMsg(m)
ms := buf.String()
@ -134,7 +134,7 @@ func TestMsgWriter_writeMsg_PGP(t *testing.T) {
m.Subject("This is a subject")
m.SetBodyString(TypeTextPlain, "This is the body")
buf := bytes.Buffer{}
mw := &msgWriter{w: &buf, c: CharsetUTF8, en: mime.QEncoding}
mw := &msgWriter{writer: &buf, charset: CharsetUTF8, encoder: mime.QEncoding}
mw.writeMsg(m)
ms := buf.String()
if !strings.Contains(ms, `encrypted; protocol="application/pgp-encrypted"`) {
@ -147,7 +147,7 @@ func TestMsgWriter_writeMsg_PGP(t *testing.T) {
m.Subject("This is a subject")
m.SetBodyString(TypeTextPlain, "This is the body")
buf = bytes.Buffer{}
mw = &msgWriter{w: &buf, c: CharsetUTF8, en: mime.QEncoding}
mw = &msgWriter{writer: &buf, charset: CharsetUTF8, encoder: mime.QEncoding}
mw.writeMsg(m)
ms = buf.String()
if !strings.Contains(ms, `signed; protocol="application/pgp-signature"`) {

66
part.go
View file

@ -14,18 +14,18 @@ type PartOption func(*Part)
// Part is a part of the Msg
type Part struct {
ctype ContentType
cset Charset
desc string
enc Encoding
del bool
w func(io.Writer) (int64, error)
contentType ContentType
charset Charset
description string
encoding Encoding
isDeleted bool
writeFunc func(io.Writer) (int64, error)
}
// GetContent executes the WriteFunc of the Part and returns the content as byte slice
func (p *Part) GetContent() ([]byte, error) {
var b bytes.Buffer
if _, err := p.w(&b); err != nil {
if _, err := p.writeFunc(&b); err != nil {
return nil, err
}
return b.Bytes(), nil
@ -33,83 +33,83 @@ func (p *Part) GetContent() ([]byte, error) {
// GetCharset returns the currently set Charset of the Part
func (p *Part) GetCharset() Charset {
return p.cset
return p.charset
}
// GetContentType returns the currently set ContentType of the Part
func (p *Part) GetContentType() ContentType {
return p.ctype
return p.contentType
}
// GetEncoding returns the currently set Encoding of the Part
func (p *Part) GetEncoding() Encoding {
return p.enc
return p.encoding
}
// GetWriteFunc returns the currently set WriterFunc of the Part
func (p *Part) GetWriteFunc() func(io.Writer) (int64, error) {
return p.w
return p.writeFunc
}
// GetDescription returns the currently set Content-Description of the Part
func (p *Part) GetDescription() string {
return p.desc
return p.description
}
// SetContent overrides the content of the Part with the given string
func (p *Part) SetContent(c string) {
buf := bytes.NewBufferString(c)
p.w = writeFuncFromBuffer(buf)
func (p *Part) SetContent(content string) {
buffer := bytes.NewBufferString(content)
p.writeFunc = writeFuncFromBuffer(buffer)
}
// SetContentType overrides the ContentType of the Part
func (p *Part) SetContentType(c ContentType) {
p.ctype = c
func (p *Part) SetContentType(contentType ContentType) {
p.contentType = contentType
}
// SetCharset overrides the Charset of the Part
func (p *Part) SetCharset(c Charset) {
p.cset = c
func (p *Part) SetCharset(charset Charset) {
p.charset = charset
}
// SetEncoding creates a new mime.WordEncoder based on the encoding setting of the message
func (p *Part) SetEncoding(e Encoding) {
p.enc = e
func (p *Part) SetEncoding(encoding Encoding) {
p.encoding = encoding
}
// SetDescription overrides the Content-Description of the Part
func (p *Part) SetDescription(d string) {
p.desc = d
func (p *Part) SetDescription(description string) {
p.description = description
}
// SetWriteFunc overrides the WriteFunc of the Part
func (p *Part) SetWriteFunc(w func(io.Writer) (int64, error)) {
p.w = w
func (p *Part) SetWriteFunc(writeFunc func(io.Writer) (int64, error)) {
p.writeFunc = writeFunc
}
// Delete removes the current part from the parts list of the Msg by setting the
// del flag to true. The msgWriter will skip it then
// isDeleted flag to true. The msgWriter will skip it then
func (p *Part) Delete() {
p.del = true
p.isDeleted = true
}
// WithPartCharset overrides the default Part charset
func WithPartCharset(c Charset) PartOption {
func WithPartCharset(charset Charset) PartOption {
return func(p *Part) {
p.cset = c
p.charset = charset
}
}
// WithPartEncoding overrides the default Part encoding
func WithPartEncoding(e Encoding) PartOption {
func WithPartEncoding(encoding Encoding) PartOption {
return func(p *Part) {
p.enc = e
p.encoding = encoding
}
}
// WithPartContentDescription overrides the default Part Content-Description
func WithPartContentDescription(d string) PartOption {
func WithPartContentDescription(description string) PartOption {
return func(p *Part) {
p.desc = d
p.description = description
}
}

34
part_test.go
View file

@ -31,15 +31,15 @@ func TestPartEncoding(t *testing.T) {
t.Errorf("newPart() WithPartEncoding() failed: no part returned")
return
}
if part.enc.String() != tt.want {
if part.encoding.String() != tt.want {
t.Errorf("newPart() WithPartEncoding() failed: expected encoding: %s, got: %s", tt.want,
part.enc.String())
part.encoding.String())
}
part.enc = ""
part.encoding = ""
part.SetEncoding(tt.enc)
if part.enc.String() != tt.want {
if part.encoding.String() != tt.want {
t.Errorf("newPart() SetEncoding() failed: expected encoding: %s, got: %s", tt.want,
part.enc.String())
part.encoding.String())
}
})
}
@ -64,9 +64,9 @@ func TestWithPartCharset(t *testing.T) {
t.Errorf("newPart() WithPartCharset() failed: no part returned")
return
}
if part.cset.String() != tt.want {
if part.charset.String() != tt.want {
t.Errorf("newPart() WithPartCharset() failed: expected charset: %s, got: %s",
tt.want, part.cset.String())
tt.want, part.charset.String())
}
})
}
@ -89,14 +89,14 @@ func TestPart_WithPartContentDescription(t *testing.T) {
t.Errorf("newPart() WithPartContentDescription() failed: no part returned")
return
}
if part.desc != tt.desc {
if part.description != tt.desc {
t.Errorf("newPart() WithPartContentDescription() failed: expected: %s, got: %s", tt.desc,
part.desc)
part.description)
}
part.desc = ""
part.description = ""
part.SetDescription(tt.desc)
if part.desc != tt.desc {
t.Errorf("newPart() SetDescription() failed: expected: %s, got: %s", tt.desc, part.desc)
if part.description != tt.desc {
t.Errorf("newPart() SetDescription() failed: expected: %s, got: %s", tt.desc, part.description)
}
})
}
@ -236,7 +236,7 @@ func TestPart_GetContentBroken(t *testing.T) {
t.Errorf("failed: %s", err)
return
}
pl[0].w = func(io.Writer) (int64, error) {
pl[0].writeFunc = func(io.Writer) (int64, error) {
return 0, fmt.Errorf("broken")
}
_, err = pl[0].GetContent()
@ -314,8 +314,8 @@ func TestPart_SetDescription(t *testing.T) {
t.Errorf("Part.GetDescription failed. Expected empty description but got: %s", pd)
}
pl[0].SetDescription(d)
if pl[0].desc != d {
t.Errorf("Part.SetDescription failed. Expected desc to be: %s, got: %s", d, pd)
if pl[0].description != d {
t.Errorf("Part.SetDescription failed. Expected description to be: %s, got: %s", d, pd)
}
pd = pl[0].GetDescription()
if pd != d {
@ -334,8 +334,8 @@ func TestPart_Delete(t *testing.T) {
return
}
pl[0].Delete()
if !pl[0].del {
t.Errorf("Delete failed. Expected: %t, got: %t", true, pl[0].del)
if !pl[0].isDeleted {
t.Errorf("Delete failed. Expected: %t, got: %t", true, pl[0].isDeleted)
}
}

63
random.go
View file

@ -22,54 +22,53 @@ const (
letterIdxMax = 63 / letterIdxBits // # of letter indices fitting in 63 bits
)
// randomStringSecure returns a random, n long string of characters. The character set is based
// on the s (special chars) and h (human readable) boolean arguments. This method uses the
// randomStringSecure returns a random, string of length characters. This method uses the
// crypto/random package and therfore is cryptographically secure
func randomStringSecure(n int) (string, error) {
rs := strings.Builder{}
rs.Grow(n)
crl := len(cr)
func randomStringSecure(length int) (string, error) {
randString := strings.Builder{}
randString.Grow(length)
charRangeLength := len(cr)
rp := make([]byte, 8)
_, err := rand.Read(rp)
randPool := make([]byte, 8)
_, err := rand.Read(randPool)
if err != nil {
return rs.String(), err
return randString.String(), err
}
for i, c, r := n-1, binary.BigEndian.Uint64(rp), letterIdxMax; i >= 0; {
if r == 0 {
_, err := rand.Read(rp)
for idx, char, rest := length-1, binary.BigEndian.Uint64(randPool), letterIdxMax; idx >= 0; {
if rest == 0 {
_, err = rand.Read(randPool)
if err != nil {
return rs.String(), err
return randString.String(), err
}
c, r = binary.BigEndian.Uint64(rp), letterIdxMax
char, rest = binary.BigEndian.Uint64(randPool), letterIdxMax
}
if idx := int(c & letterIdxMask); idx < crl {
rs.WriteByte(cr[idx])
i--
if i := int(char & letterIdxMask); i < charRangeLength {
randString.WriteByte(cr[i])
idx--
}
c >>= letterIdxBits
r--
char >>= letterIdxBits
rest--
}
return rs.String(), nil
return randString.String(), nil
}
// randNum returns a random number with a maximum value of n
func randNum(n int) (int, error) {
if n <= 0 {
return 0, fmt.Errorf("provided number is <= 0: %d", n)
// randNum returns a random number with a maximum value of length
func randNum(length int) (int, error) {
if length <= 0 {
return 0, fmt.Errorf("provided number is <= 0: %d", length)
}
mbi := big.NewInt(int64(n))
if !mbi.IsUint64() {
return 0, fmt.Errorf("big.NewInt() generation returned negative value: %d", mbi)
length64 := big.NewInt(int64(length))
if !length64.IsUint64() {
return 0, fmt.Errorf("big.NewInt() generation returned negative value: %d", length64)
}
rn64, err := rand.Int(rand.Reader, mbi)
randNum64, err := rand.Int(rand.Reader, length64)
if err != nil {
return 0, err
}
rn := int(rn64.Int64())
if rn < 0 {
return 0, fmt.Errorf("generated random number does not fit as int64: %d", rn64)
randomNum := int(randNum64.Int64())
if randomNum < 0 {
return 0, fmt.Errorf("generated random number does not fit as int64: %d", randNum64)
}
return rn, nil
return randomNum, nil
}

20
reader.go
View file

@ -10,8 +10,8 @@ import (
// Reader is a type that implements the io.Reader interface for a Msg
type Reader struct {
buf []byte // contents are the bytes buf[off : len(buf)]
off int // read at &buf[off], write at &buf[len(buf)]
buffer []byte // contents are the bytes buffer[offset : len(buffer)]
offset int // read at &buffer[offset], write at &buffer[len(buffer)]
err error // initialization error
}
@ -21,28 +21,28 @@ func (r *Reader) Error() error {
}
// Read reads the length of p of the Msg buffer to satisfy the io.Reader interface
func (r *Reader) Read(p []byte) (n int, err error) {
func (r *Reader) Read(payload []byte) (n int, err error) {
if r.err != nil {
return 0, r.err
}
if r.empty() || r.buf == nil {
if r.empty() || r.buffer == nil {
r.Reset()
if len(p) == 0 {
if len(payload) == 0 {
return 0, nil
}
return 0, io.EOF
}
n = copy(p, r.buf[r.off:])
r.off += n
n = copy(payload, r.buffer[r.offset:])
r.offset += n
return n, err
}
// Reset resets the Reader buffer to be empty, but it retains the underlying storage
// for use by future writes.
func (r *Reader) Reset() {
r.buf = r.buf[:0]
r.off = 0
r.buffer = r.buffer[:0]
r.offset = 0
}
// empty reports whether the unread portion of the Reader buffer is empty.
func (r *Reader) empty() bool { return len(r.buf) <= r.off }
func (r *Reader) empty() bool { return len(r.buffer) <= r.offset }

4
reader_test.go
View file

@ -65,7 +65,7 @@ func TestReader_Read_error(t *testing.T) {
// TestReader_Read_empty tests the Reader.Read method with an empty buffer
func TestReader_Read_empty(t *testing.T) {
r := Reader{buf: []byte{}}
r := Reader{buffer: []byte{}}
p := make([]byte, 1)
p[0] = 'a'
_, err := r.Read(p)
@ -76,7 +76,7 @@ func TestReader_Read_empty(t *testing.T) {
// TestReader_Read_nil tests the Reader.Read method with a nil buffer
func TestReader_Read_nil(t *testing.T) {
r := Reader{buf: nil, off: -10}
r := Reader{buffer: nil, offset: -10}
p := make([]byte, 0)
_, err := r.Read(p)
if err != nil && !errors.Is(err, io.EOF) {

28
senderror.go
View file

@ -71,34 +71,34 @@ func (e *SendError) Error() string {
return "unknown reason"
}
var em strings.Builder
em.WriteString(e.Reason.String())
var errMessage strings.Builder
errMessage.WriteString(e.Reason.String())
if len(e.errlist) > 0 {
em.WriteRune(':')
errMessage.WriteRune(':')
for i := range e.errlist {
em.WriteRune(' ')
em.WriteString(e.errlist[i].Error())
errMessage.WriteRune(' ')
errMessage.WriteString(e.errlist[i].Error())
if i != len(e.errlist)-1 {
em.WriteString(", ")
errMessage.WriteString(", ")
}
}
}
if len(e.rcpt) > 0 {
em.WriteString(", affected recipient(s): ")
errMessage.WriteString(", affected recipient(s): ")
for i := range e.rcpt {
em.WriteString(e.rcpt[i])
errMessage.WriteString(e.rcpt[i])
if i != len(e.rcpt)-1 {
em.WriteString(", ")
errMessage.WriteString(", ")
}
}
}
return em.String()
return errMessage.String()
}
// Is implements the errors.Is functionality and compares the SendErrReason
func (e *SendError) Is(et error) bool {
func (e *SendError) Is(errType error) bool {
var t *SendError
if errors.As(et, &t) && t != nil {
if errors.As(errType, &t) && t != nil {
return e.Reason == t.Reason && e.isTemp == t.isTemp
}
return false
@ -143,6 +143,6 @@ func (r SendErrReason) String() string {
// isTempError checks the given SMTP error and returns true if the given error is of temporary nature
// and should be retried
func isTempError(e error) bool {
return e.Error()[0] == '4'
func isTempError(err error) bool {
return err.Error()[0] == '4'
}

8
tls.go
View file

@ -8,17 +8,17 @@ package mail
type TLSPolicy int
const (
// TLSMandatory requires that the connection cto the server is
// TLSMandatory requires that the connection to the server is
// encrypting using STARTTLS. If the server does not support STARTTLS
// the connection will be terminated with an error
TLSMandatory TLSPolicy = iota
// TLSOpportunistic tries cto establish an encrypted connection via the
// TLSOpportunistic tries to establish an encrypted connection via the
// STARTTLS protocol. If the server does not support this, it will fall
// back cto non-encrypted plaintext transmission
// back to non-encrypted plaintext transmission
TLSOpportunistic
// NoTLS forces the transaction cto be not encrypted
// NoTLS forces the transaction to be not encrypted
NoTLS
)