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Little refactor for Prometheus metrics parser.

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This commit is contained in:
Stanislav Nikitin 2020-11-29 05:49:45 +05:00
parent 5b1094c258
commit cb5fdd4d8e
Signed by: pztrn
GPG Key ID: 1E944A0F0568B550
1 changed files with 61 additions and 51 deletions
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112
internal/application/parser.go
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@ -39,57 +39,7 @@ func (a *Application) parse(body string) map[string]string {
} else {
value = strings.Split(line, " ")[1]
name = strings.Split(line, "{")[0]
// Parse params into "name:value" string.
valuesString := strings.Split(strings.Split(line, "{")[1], "}")[0]
var (
paramName, paramValue string
paramNameFinished, paramValueStarted, paramValueFinished bool
)
for _, r := range valuesString {
if paramValueFinished && string(r) == "," {
params = append(params, paramName+":"+paramValue)
paramName, paramValue = "", ""
paramNameFinished, paramValueStarted, paramValueFinished = false, false, false
continue
}
if !paramNameFinished {
if string(r) != "=" {
paramName += string(r)
continue
} else {
paramNameFinished = true
continue
}
} else {
if string(r) == "\"" && !paramValueStarted {
paramValueStarted = true
continue
}
if paramValueStarted && string(r) != "\"" {
paramValue += string(r)
continue
}
if paramValueStarted && string(r) == "\"" {
paramValueFinished = true
continue
}
}
}
if paramName != "" && paramValue != "" {
params = append(params, paramName+":"+paramValue)
}
params = a.getParametersForPrometheusMetric(line)
for _, param := range params {
name += "/" + param
@ -103,3 +53,63 @@ func (a *Application) parse(body string) map[string]string {
return data
}
// Parses passed line and returns a slice of strings with parameters parsed.
func (a *Application) getParametersForPrometheusMetric(line string) []string {
valuesString := strings.Split(strings.Split(line, "{")[1], "}")[0]
var (
params []string
paramName, paramValue string
paramNameFinished, paramValueStarted, paramValueFinished bool
)
for _, r := range valuesString {
if paramValueFinished && string(r) == "," {
params = append(params, paramName+":"+paramValue)
paramName, paramValue = "", ""
paramNameFinished, paramValueStarted, paramValueFinished = false, false, false
continue
}
// Sometimes nestif causes questions, like here. Is code below is
// "deply nested"? I think not. So:
// nolint:nestif
if !paramNameFinished {
if string(r) != "=" {
paramName += string(r)
continue
} else {
paramNameFinished = true
continue
}
} else {
if string(r) == "\"" && !paramValueStarted {
paramValueStarted = true
continue
}
if paramValueStarted && string(r) != "\"" {
paramValue += string(r)
continue
}
if paramValueStarted && string(r) == "\"" {
paramValueFinished = true
continue
}
}
}
if paramName != "" && paramValue != "" {
params = append(params, paramName+":"+paramValue)
}
return params
}