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Improve client option documentation for clarity and validation

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Enhanced the documentation for NewClient and related option functions to provide clearer descriptions. Added validation details for WithPort and WithTimeout, and improved explanations for SSL/TLS settings.
This commit is contained in:
Winni Neessen 2024-10-04 21:26:29 +02:00
parent 779a3f3942
commit a34f400a05
Signed by: wneessen
GPG key ID: 385AC9889632126E
1 changed files with 17 additions and 11 deletions
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28
client.go
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@ -225,7 +225,11 @@ var (
"combined with any of SUCCESS, FAILURE or DELAY")
)
// NewClient returns a new Session client object
// NewClient creates a new Client instance with the provided host and optional configuration Option functions.
// It initializes default values for connection timeout, port, TLS settings, and HELO/EHLO hostname.
// Option functions, if provided, override default values.
//
// Returns an error if critical defaults are unset.
func NewClient(host string, opts ...Option) (*Client, error) {
c := &Client{
connTimeout: DefaultTimeout,
@ -258,7 +262,8 @@ func NewClient(host string, opts ...Option) (*Client, error) {
return c, nil
}
// WithPort overrides the default connection port
// WithPort sets the port number for the Client and overrides the default port. It validates the port number to
// ensure it is between 1 and 65535. An error is returned if the provided port number is invalid.
func WithPort(port int) Option {
return func(c *Client) error {
if port < 1 || port > 65535 {
@ -269,7 +274,8 @@ func WithPort(port int) Option {
}
}
// WithTimeout overrides the default connection timeout
// WithTimeout sets the connection timeout for the Client to the provided duration and overrides the default
// timeout. An error is returned if the provided timeout is invalid.
func WithTimeout(timeout time.Duration) Option {
return func(c *Client) error {
if timeout <= 0 {
@ -280,7 +286,7 @@ func WithTimeout(timeout time.Duration) Option {
}
}
// WithSSL tells the client to use a SSL/TLS connection
// WithSSL enables implicit SSL/TLS for the Client.
func WithSSL() Option {
return func(c *Client) error {
c.useSSL = true
@ -288,16 +294,16 @@ func WithSSL() Option {
}
}
// WithSSLPort tells the Client wether or not to use SSL and fallback.
// WithSSLPort enables implicit SSL/TLS with an optional fallback for the Client.
// 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 this option is used with NewClient, 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 plaintext.
//
// 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 WithSSLPort(fallback bool) Option {
return func(c *Client) error {
c.SetSSLPort(true, fallback)