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Refine method documentation in client.go

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Correct typos and enhance clarity in method descriptions. Provide additional context for default values and behavior, and specify consequences for security settings in client configurations.
This commit is contained in:
Winni Neessen 2024-10-04 22:23:18 +02:00
parent eeaee3f60a
commit d900f5403e
Signed by: wneessen
GPG key ID: 385AC9889632126E
1 changed files with 42 additions and 29 deletions
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71
client.go
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@ -311,7 +311,7 @@ func WithSSLPort(fallback bool) Option {
}
}
// WithDebugLog neables debug logging for the Client. The debug logger will log incoming and outgoing
// WithDebugLog enables debug logging for the Client. The debug logger will log incoming and outgoing
// communication between the Client and the server to os.StdErr.
//
// Note: The SMTP communication might include unencrypted authentication data, depending if you are
@ -492,8 +492,10 @@ func WithDSNRcptNotifyType(opts ...DSNRcptNotifyOption) Option {
}
}
// WithoutNoop disables the Client Noop check during connections. This is primarily for servers which delay responses
// to SMTP commands that are not the AUTH command. For example Microsoft Exchange's Tarpit.
// WithoutNoop indicates that the Client should skip the "NOOP" command during the dial.
//
// This is useful for servers which delay potentially unwanted clients when they perform commands
// other than AUTH. For example Microsoft Exchange's Tarpit.
func WithoutNoop() Option {
return func(c *Client) error {
c.noNoop = true
@ -501,7 +503,8 @@ func WithoutNoop() Option {
}
}
// WithDialContextFunc overrides the default DialContext for connecting SMTP server
// WithDialContextFunc sets the provided DialContextFunc as DialContext and overrides the default DialContext for
// connecting to the SMTP server
func WithDialContextFunc(dialCtxFunc DialContextFunc) Option {
return func(c *Client) error {
c.dialContextFunc = dialCtxFunc
@ -509,34 +512,35 @@ func WithDialContextFunc(dialCtxFunc DialContextFunc) Option {
}
}
// TLSPolicy returns the currently set TLSPolicy as string
// TLSPolicy returns the TLSPolicy that is currently set on the Client as string
func (c *Client) TLSPolicy() string {
return c.tlspolicy.String()
}
// ServerAddr returns the currently set combination of hostname and port
// ServerAddr returns the server address that is currently set on the Client in the format "host:port".
func (c *Client) ServerAddr() string {
return fmt.Sprintf("%s:%d", c.host, c.port)
}
// SetTLSPolicy overrides the current TLSPolicy with the given TLSPolicy value
// SetTLSPolicy sets or overrides the TLSPolicy that is currently set on the Client with the given
// TLSPolicy.
//
// Note: To follow best-practices for SMTP TLS connections, it is recommended
// to use SetTLSPortPolicy instead.
// Note: To follow best-practices for SMTP TLS connections, it is recommended to use SetTLSPortPolicy
// instead.
func (c *Client) SetTLSPolicy(policy TLSPolicy) {
c.tlspolicy = policy
}
// SetTLSPortPolicy overrides the current TLSPolicy with the given TLSPolicy
// value. The correct port is automatically set.
// SetTLSPortPolicy sets or overrides the TLSPolicy that is currently set on the Client with the given
// TLSPolicy. The correct port is automatically set.
//
// Port 587 is used for TLSMandatory and TLSOpportunistic.
// If the connection fails with TLSOpportunistic, a plaintext connection is
// attempted on port 25 as a fallback.
// NoTLS will allways use port 25.
// If TLSMandatory or TLSOpportunistic are provided as TLSPolicy, port 587 will be used for the connection.
// If the connection fails with TLSOpportunistic, the Client will attempt to connect on port 25 using
// using an unencrypted connection as a fallback. If NoTLS is provided, the Client will always use port 25.
//
// Note: If a different port has already been set otherwise, the port-choosing
// and fallback automatism will be skipped.
// Note: If a different port has already been set otherwise using WithPort, the selected port has higher
// precedence and is used to establish the SSL/TLS connection. In this case the authmatic fallback
// mechanism is skipped at all.
func (c *Client) SetTLSPortPolicy(policy TLSPolicy) {
if c.port == DefaultPort {
c.port = DefaultPortTLS
@ -552,21 +556,21 @@ func (c *Client) SetTLSPortPolicy(policy TLSPolicy) {
c.tlspolicy = policy
}
// SetSSL tells the Client wether to use SSL or not
// SetSSL sets or overrides wether the Client should use implicit SSL/TLS.
func (c *Client) SetSSL(ssl bool) {
c.useSSL = ssl
}
// SetSSLPort tells the Client wether or not to use SSL and fallback.
// The correct port is automatically set.
// SetSSLPort sets or overrides wether the Client should use implicit SSL/TLS with optional fallback. The
// correct port is automatically set.
//
// Port 465 is used when SSL set (true).
// 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.
// If ssl is set to true, the default port 25 will be overriden with port 465. If fallback is set to true
// and the SSL/TLS connection fails, the Client will attempt to connect on port 25 using using an
// unencrypted connection.
//
// Note: If a different port has already been set otherwise, the port-choosing
// and fallback automatism will be skipped.
// Note: If a different port has already been set otherwise using WithPort, the selected port has higher
// precedence and is used to establish the SSL/TLS connection. In this case the authmatic fallback
// mechanism is skipped at all.
func (c *Client) SetSSLPort(ssl bool, fallback bool) {
if c.port == DefaultPort {
if ssl {
@ -582,7 +586,12 @@ func (c *Client) SetSSLPort(ssl bool, fallback bool) {
c.useSSL = ssl
}
// SetDebugLog tells the Client whether debug logging is enabled or not
// SetDebugLog sets or overrides wether the Client is using debug logging. The debug logger will log
// incoming and outgoing communication between the Client and the server to os.StdErr.
//
// Note: The SMTP communication might include unencrypted authentication data, depending if you are
// using SMTP authentication and the type of authentication mechanism. This could pose a data
// protection problem. Use debug logging with care.
func (c *Client) SetDebugLog(val bool) {
c.useDebugLog = val
if c.smtpClient != nil {
@ -590,7 +599,10 @@ func (c *Client) SetDebugLog(val bool) {
}
}
// SetLogger tells the Client which log.Logger to use
// SetLogger sets of overrides the custom logger currently set for the Client. The logger has to satisfy
// the log.Logger interface and is only used when debug logging is enabled on the Client.
//
// By default we use log.Stdlog.
func (c *Client) SetLogger(logger log.Logger) {
c.logger = logger
if c.smtpClient != nil {
@ -598,7 +610,8 @@ func (c *Client) SetLogger(logger log.Logger) {
}
}
// SetTLSConfig overrides the current *tls.Config with the given *tls.Config value
// SetTLSConfig sets or overrides the tls.Config that is currently set for the Client with the given value.
// An error is returned if the provided tls.Config is invalid.
func (c *Client) SetTLSConfig(tlsconfig *tls.Config) error {
c.mutex.Lock()
defer c.mutex.Unlock()