Add unix expr helper (#1952)
* Add unix expr helper * Add original value not parsed error * return early if cannot parse * Add tests * Fix negative value
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@ -68,6 +68,7 @@ func GetExprEnv(ctx map[string]interface{}) map[string]interface{} {
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"GetDecisionsCount": GetDecisionsCount,
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"GetDecisionsSinceCount": GetDecisionsSinceCount,
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"Sprintf": fmt.Sprintf,
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"ParseUnix": ParseUnix,
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}
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for k, v := range ctx {
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ExprLib[k] = v
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@ -283,10 +284,20 @@ func GetDecisionsSinceCount(value string, since string) int {
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}
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func LookupHost(value string) []string {
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addresses , err := net.LookupHost(value)
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addresses, err := net.LookupHost(value)
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if err != nil {
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log.Errorf("Failed to lookup host '%s' : %s", value, err)
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return []string{}
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}
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return addresses
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}
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func ParseUnix(value string) string {
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//Splitting string here as some unix timestamp may have milliseconds and break ParseInt
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i, err := strconv.ParseInt(strings.Split(value, ".")[0], 10, 64)
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if err != nil || i <= 0 {
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log.Errorf("Unable to parse %s as unix timestamp.", value)
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return ""
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}
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return time.Unix(i, 0).Format(time.RFC3339)
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}
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@ -971,3 +971,63 @@ func TestGetDecisionsSinceCount(t *testing.T) {
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log.Printf("test '%s' : OK", test.name)
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}
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}
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func TestParseUnix(t *testing.T) {
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tests := []struct {
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name string
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env map[string]interface{}
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code string
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result string
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err string
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}{
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{
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name: "ParseUnix() test: valid value with milli",
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env: map[string]interface{}{
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"unix": "1672239773.3590894",
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"ParseUnix": ParseUnix,
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},
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code: "ParseUnix(unix)",
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result: "2022-12-28T15:02:53Z",
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err: "",
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},
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{
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name: "ParseUnix() test: valid value without milli",
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env: map[string]interface{}{
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"unix": "1672239773",
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"ParseUnix": ParseUnix,
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},
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code: "ParseUnix(unix)",
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result: "2022-12-28T15:02:53Z",
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err: "",
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},
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{
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name: "ParseUnix() test: invalid input",
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env: map[string]interface{}{
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"unix": "AbcDefG!#",
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"ParseUnix": ParseUnix,
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},
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code: "ParseUnix(unix)",
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result: "",
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err: "",
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},
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{
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name: "ParseUnix() test: negative value",
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env: map[string]interface{}{
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"unix": "-1000",
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"ParseUnix": ParseUnix,
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},
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code: "ParseUnix(unix)",
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result: "",
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err: "",
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},
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}
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for _, test := range tests {
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program, err := expr.Compile(test.code, expr.Env(test.env))
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require.NoError(t, err)
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output, err := expr.Run(program, test.env)
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require.NoError(t, err)
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require.Equal(t, test.result, output)
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log.Printf("test '%s' : OK", test.name)
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}
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}
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