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stackdriver: interpolate stackdriver filter wildcards when asterix is used in filter

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This commit is contained in:
Erik Sundell 2018-10-02 17:07:46 +02:00
parent ed349075a0
commit 4d8f594d31
1 changed files with 55 additions and 1 deletions
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56
pkg/tsdb/stackdriver/stackdriver.go
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@ -15,6 +15,8 @@ import (
"strings"
"time"
"github.com/grafana/grafana/pkg/cmd/grafana-cli/logger"
"golang.org/x/net/context/ctxhttp"
"github.com/grafana/grafana/pkg/api/pluginproxy"
@ -159,6 +161,53 @@ func (e *StackdriverExecutor) buildQueries(tsdbQuery *tsdb.TsdbQuery) ([]*Stackd
return stackdriverQueries, nil
}
func reverse(s string) string {
chars := []rune(s)
for i, j := 0, len(chars)-1; i < j; i, j = i+1, j-1 {
chars[i], chars[j] = chars[j], chars[i]
}
return string(chars)
}
func escapeDoubleBackslash(target string) string {
var re = regexp.MustCompile(`\\`)
return re.ReplaceAllString(target, `\\\\`)
// return strings.Replace(target, `\`, "", -1)
}
func escapeIllegalCharacters(target string) string {
var re = regexp.MustCompile(`[-\/^$+?.()|[\]{}]`)
return string(re.ReplaceAllFunc([]byte(target), func(in []byte) []byte {
return []byte(strings.Replace(string(in), string(in), `\\`+string(in), 1))
}))
}
func replaceSingleAsterixCharacters(target string) string {
return strings.Replace(target, "*", ".*", -1)
}
func interpolateFilterWildcards(value string) string {
if strings.HasSuffix(value, "*") && strings.HasPrefix(value, "*") {
value = strings.Replace(value, "*", "", 1)
value = fmt.Sprintf(`has_substring("%s")`, value)
} else if strings.HasPrefix(value, "*") {
value = strings.Replace(value, "*", "", 1)
value = fmt.Sprintf(`ends_with("%s")`, value)
} else if strings.HasSuffix(value, "*") {
value = reverse(strings.Replace(reverse(value), "*", "", 1))
value = fmt.Sprintf(`starts_with("%s")`, value)
} else if strings.Contains(value, "*") {
value = escapeIllegalCharacters(value)
value = replaceSingleAsterixCharacters(value)
value = strings.Replace(value, `"`, `\\"`, -1)
value = fmt.Sprintf(`monitoring.regex.full_match("^%s$")`, value)
}
logger.Info("filter", "filter", value)
return value
}
func buildFilterString(metricType string, filterParts []interface{}) string {
filterString := ""
for i, part := range filterParts {
@ -166,7 +215,11 @@ func buildFilterString(metricType string, filterParts []interface{}) string {
if part == "AND" {
filterString += " "
} else if mod == 2 {
filterString += fmt.Sprintf(`"%s"`, part)
if strings.Contains(part.(string), "*") {
filterString += interpolateFilterWildcards(part.(string))
} else {
filterString += fmt.Sprintf(`"%s"`, part)
}
} else {
filterString += part.(string)
}
@ -231,6 +284,7 @@ func (e *StackdriverExecutor) executeQuery(ctx context.Context, query *Stackdriv
}
req.URL.RawQuery = query.Params.Encode()
logger.Info("req.URL.RawQuery", "req.URL.RawQuery", req.URL.RawQuery)
queryResult.Meta.Set("rawQuery", req.URL.RawQuery)
alignmentPeriod, ok := req.URL.Query()["aggregation.alignmentPeriod"]