Supratim Ghose
39 lines
1.2 KiB
Go
39 lines
1.2 KiB
Go
package server
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import (
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"regexp"
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"strings"
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)
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// splitPattern is the regex pattern used to split external host definitions.
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// kept as a const so the literal is easy to see and reuse in tests or docs.
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const splitPattern = ",|\n"
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// splitRe is the compiled regexp for splitPattern. Compiling once at package
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// initialization avoids repeated compilation on every call to
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// SplitExternalHosts and is slightly more efficient.
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var splitRe = regexp.MustCompile(splitPattern)
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// SplitExternalHosts splits a string containing external hostnames by comma and/or newline delimiters.
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// It trims whitespace around each hostname and filters out empty strings.
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// Examples:
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// - "host1.com,host2.com" -> ["host1.com", "host2.com"]
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// - "host1.com, host2.com" -> ["host1.com", "host2.com"]
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// - "host1.com\nhost2.com" -> ["host1.com", "host2.com"]
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// - "host1.com,\nhost2.com" -> ["host1.com", "host2.com"]
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func SplitExternalHosts(s string) []string {
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// Use regexp to split on either comma or newline
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parts := splitRe.Split(s, -1)
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// Trim whitespace and filter out empty strings
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result := make([]string, 0, len(parts))
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for _, part := range parts {
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trimmed := strings.TrimSpace(part)
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if trimmed != "" {
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result = append(result, trimmed)
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}
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}
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return result
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}
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