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23 lines
430 B
Go
23 lines
430 B
Go
package gravatar
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import (
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"crypto/sha256"
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"fmt"
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"strings"
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)
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const baseUrl = "https://www.gravatar.com/avatar"
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const defaultSize = 80
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const maxSize = 2048
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func Url(email string, size int) string {
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email = strings.ToLower(email)
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email = strings.TrimSpace(email)
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hash := sha256.Sum256([]byte(email))
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if size < 1 {
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size = defaultSize
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}
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size = min(maxSize, size)
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return fmt.Sprintf("%s/%x?s=%d", baseUrl, hash, size)
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}
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