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App names may now contain dots, such as sneak.berlin: runs of lowercase letters and numbers joined by single dots or by hyphens, 2 to 63 characters. Docker accepts every such name in the app's image name, upaas-<name>; a dot needs a letter or number on both sides because Docker requires it. The rule also keeps a dot off either end, so the name is safe as a directory and log file name. The new and edit app forms use the same pattern. Their old one was not a valid regular expression under the flag browsers compile it with, so browsers ignored it. Model: opus-5-5
51 lines
1.6 KiB
Go
51 lines
1.6 KiB
Go
package handlers
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import (
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"errors"
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"regexp"
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"strconv"
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)
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const (
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// appNameMinLength is the minimum allowed length for an app name.
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appNameMinLength = 2
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// appNameMaxLength is the maximum allowed length for an app name.
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appNameMaxLength = 63
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)
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// validAppNameRe matches runs of lowercase letters and digits joined by
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// single dots or by hyphens, such as "my-app" or "sneak.berlin". Docker
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// accepts every name it allows as the app's image name, upaas-<name>; a
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// dot needs a letter or digit on both sides because Docker requires it.
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// It also keeps the name from being "." or ".." or starting or ending
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// with a dot, so it is safe as a directory and file name. The pattern
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// attribute of the name field on the new and edit app forms is the same.
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var validAppNameRe = regexp.MustCompile(`^[a-z0-9]+((\.|-+)[a-z0-9]+)*$`)
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var (
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errAppNameLength = errors.New(
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"app name must be between " +
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strconv.Itoa(appNameMinLength) + " and " +
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strconv.Itoa(appNameMaxLength) + " characters",
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)
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errAppNamePattern = errors.New(
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"app name must contain only lowercase letters, numbers, hyphens, " +
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"and dots, must start and end with a letter or number, " +
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"and must have a letter or number on both sides of each dot",
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)
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)
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// validateAppName checks that the given app name is safe for use in Docker
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// container names, image tags, and file system paths.
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func validateAppName(name string) error {
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if len(name) < appNameMinLength || len(name) > appNameMaxLength {
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return errAppNameLength
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}
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if !validAppNameRe.MatchString(name) {
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return errAppNamePattern
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}
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return nil
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}
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