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https://github.com/TwiN/gatus.git
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Implement any function and prettify displayed condition on failure
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parent
855c106e9b
commit
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@ -48,11 +48,20 @@ const (
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CertificateExpirationPlaceholder = "[CERTIFICATE_EXPIRATION]"
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// LengthFunctionPrefix is the prefix for the length function
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//
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// Usage: len([BODY].articles) == 10, len([BODY].name) > 5
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LengthFunctionPrefix = "len("
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// PatternFunctionPrefix is the prefix for the pattern function
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//
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// Usage: pat(192.168.*.*)
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PatternFunctionPrefix = "pat("
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// AnyFunctionPrefix is the prefix for the any function
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//
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// Usage: any(1.1.1.1, 1.0.0.1)
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AnyFunctionPrefix = "any("
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// FunctionSuffix is the suffix for all functions
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FunctionSuffix = ")"
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@ -67,48 +76,51 @@ type Condition string
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func (c *Condition) evaluate(result *Result) bool {
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condition := string(*c)
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success := false
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var resolvedCondition string
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conditionToDisplay := condition
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if strings.Contains(condition, "==") {
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parts := sanitizeAndResolve(strings.Split(condition, "=="), result)
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success = isEqual(parts[0], parts[1])
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resolvedCondition = fmt.Sprintf("%v == %v", parts[0], parts[1])
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parameters, resolvedParameters := sanitizeAndResolve(strings.Split(condition, "=="), result)
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success = isEqual(resolvedParameters[0], resolvedParameters[1])
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if !success {
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conditionToDisplay = prettify(parameters, resolvedParameters, "==")
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}
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} else if strings.Contains(condition, "!=") {
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parts := sanitizeAndResolve(strings.Split(condition, "!="), result)
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success = !isEqual(parts[0], parts[1])
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resolvedCondition = fmt.Sprintf("%v != %v", parts[0], parts[1])
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parameters, resolvedParameters := sanitizeAndResolve(strings.Split(condition, "!="), result)
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success = !isEqual(resolvedParameters[0], resolvedParameters[1])
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if !success {
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conditionToDisplay = prettify(parameters, resolvedParameters, "!=")
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}
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} else if strings.Contains(condition, "<=") {
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parts := sanitizeAndResolveNumerical(strings.Split(condition, "<="), result)
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success = parts[0] <= parts[1]
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resolvedCondition = fmt.Sprintf("%v <= %v", parts[0], parts[1])
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parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, "<="), result)
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success = resolvedParameters[0] <= resolvedParameters[1]
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if !success {
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conditionToDisplay = prettifyNumericalParameters(parameters, resolvedParameters, "<=")
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}
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} else if strings.Contains(condition, ">=") {
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parts := sanitizeAndResolveNumerical(strings.Split(condition, ">="), result)
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success = parts[0] >= parts[1]
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resolvedCondition = fmt.Sprintf("%v >= %v", parts[0], parts[1])
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parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, ">="), result)
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success = resolvedParameters[0] >= resolvedParameters[1]
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if !success {
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conditionToDisplay = prettifyNumericalParameters(parameters, resolvedParameters, ">=")
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}
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} else if strings.Contains(condition, ">") {
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parts := sanitizeAndResolveNumerical(strings.Split(condition, ">"), result)
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success = parts[0] > parts[1]
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resolvedCondition = fmt.Sprintf("%v > %v", parts[0], parts[1])
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parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, ">"), result)
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success = resolvedParameters[0] > resolvedParameters[1]
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if !success {
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conditionToDisplay = prettifyNumericalParameters(parameters, resolvedParameters, ">")
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}
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} else if strings.Contains(condition, "<") {
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parts := sanitizeAndResolveNumerical(strings.Split(condition, "<"), result)
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success = parts[0] < parts[1]
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resolvedCondition = fmt.Sprintf("%v < %v", parts[0], parts[1])
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parameters, resolvedParameters := sanitizeAndResolveNumerical(strings.Split(condition, "<"), result)
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success = resolvedParameters[0] < resolvedParameters[1]
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if !success {
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conditionToDisplay = prettifyNumericalParameters(parameters, resolvedParameters, "<")
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}
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} else {
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result.Errors = append(result.Errors, fmt.Sprintf("invalid condition '%s' has been provided", condition))
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return false
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}
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conditionToDisplay := condition
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// If the condition isn't a success, return what the resolved condition was too
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// XXX: make this configurable? i.e. show-resolved-conditions-on-failure
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if !success {
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log.Printf("[Condition][evaluate] Condition '%s' did not succeed because '%s' is false", condition, resolvedCondition)
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// Check if the resolved condition was an invalid path
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isResolvedConditionInvalidPath := strings.ReplaceAll(resolvedCondition, fmt.Sprintf("%s ", InvalidConditionElementSuffix), "") == condition
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if isResolvedConditionInvalidPath {
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// Since, in the event of an invalid path, the resolvedCondition contains the condition itself,
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// we'll only display the resolvedCondition
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conditionToDisplay = resolvedCondition
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} else {
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conditionToDisplay = fmt.Sprintf("%s (%s)", condition, resolvedCondition)
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}
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log.Printf("[Condition][evaluate] Condition '%s' did not succeed because '%s' is false", condition, condition)
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}
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result.ConditionResults = append(result.ConditionResults, &ConditionResult{Condition: conditionToDisplay, Success: success})
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return success
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@ -116,33 +128,64 @@ func (c *Condition) evaluate(result *Result) bool {
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// isEqual compares two strings.
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//
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// It also supports the pattern function. That is to say, if one of the strings starts with PatternFunctionPrefix
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// and ends with FunctionSuffix, it will be treated like a pattern.
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// Supports the pattern and the any functions.
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// i.e. if one of the parameters starts with PatternFunctionPrefix and ends with FunctionSuffix, it will be treated like
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// a pattern.
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func isEqual(first, second string) bool {
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var isFirstPattern, isSecondPattern bool
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if strings.HasPrefix(first, PatternFunctionPrefix) && strings.HasSuffix(first, FunctionSuffix) {
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isFirstPattern = true
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first = strings.TrimSuffix(strings.TrimPrefix(first, PatternFunctionPrefix), FunctionSuffix)
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}
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if strings.HasPrefix(second, PatternFunctionPrefix) && strings.HasSuffix(second, FunctionSuffix) {
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isSecondPattern = true
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second = strings.TrimSuffix(strings.TrimPrefix(second, PatternFunctionPrefix), FunctionSuffix)
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}
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if isFirstPattern && !isSecondPattern {
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return pattern.Match(first, second)
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} else if !isFirstPattern && isSecondPattern {
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return pattern.Match(second, first)
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} else {
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return first == second
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firstHasFunctionSuffix := strings.HasSuffix(first, FunctionSuffix)
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secondHasFunctionSuffix := strings.HasSuffix(second, FunctionSuffix)
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if firstHasFunctionSuffix || secondHasFunctionSuffix {
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var isFirstPattern, isSecondPattern bool
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if strings.HasPrefix(first, PatternFunctionPrefix) && firstHasFunctionSuffix {
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isFirstPattern = true
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first = strings.TrimSuffix(strings.TrimPrefix(first, PatternFunctionPrefix), FunctionSuffix)
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}
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if strings.HasPrefix(second, PatternFunctionPrefix) && secondHasFunctionSuffix {
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isSecondPattern = true
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second = strings.TrimSuffix(strings.TrimPrefix(second, PatternFunctionPrefix), FunctionSuffix)
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}
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if isFirstPattern && !isSecondPattern {
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return pattern.Match(first, second)
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} else if !isFirstPattern && isSecondPattern {
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return pattern.Match(second, first)
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}
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var isFirstAny, isSecondAny bool
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if strings.HasPrefix(first, AnyFunctionPrefix) && firstHasFunctionSuffix {
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isFirstAny = true
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first = strings.TrimSuffix(strings.TrimPrefix(first, AnyFunctionPrefix), FunctionSuffix)
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}
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if strings.HasPrefix(second, AnyFunctionPrefix) && secondHasFunctionSuffix {
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isSecondAny = true
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second = strings.TrimSuffix(strings.TrimPrefix(second, AnyFunctionPrefix), FunctionSuffix)
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}
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if isFirstAny && !isSecondAny {
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options := strings.Split(first, ",")
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for _, option := range options {
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if strings.TrimSpace(option) == second {
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return true
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}
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}
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return false
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} else if !isFirstAny && isSecondAny {
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options := strings.Split(second, ",")
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for _, option := range options {
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if strings.TrimSpace(option) == first {
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return true
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}
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}
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return false
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}
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}
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return first == second
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}
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// sanitizeAndResolve sanitizes and resolves a list of element and returns the list of resolved elements
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func sanitizeAndResolve(list []string, result *Result) []string {
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var sanitizedList []string
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// sanitizeAndResolve sanitizes and resolves a list of elements and returns the list of parameters as well as a list
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// of resolved parameters
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func sanitizeAndResolve(elements []string, result *Result) (parameters, resolvedParameters []string) {
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body := strings.TrimSpace(string(result.Body))
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for _, element := range list {
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for _, element := range elements {
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element = strings.TrimSpace(element)
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parameters = append(parameters, element)
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switch strings.ToUpper(element) {
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case StatusPlaceholder:
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element = strconv.Itoa(result.HTTPStatus)
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@ -185,23 +228,48 @@ func sanitizeAndResolve(list []string, result *Result) []string {
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}
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}
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}
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sanitizedList = append(sanitizedList, element)
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resolvedParameters = append(resolvedParameters, element)
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}
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return sanitizedList
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return parameters, resolvedParameters
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}
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func sanitizeAndResolveNumerical(list []string, result *Result) []int64 {
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var sanitizedNumbers []int64
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sanitizedList := sanitizeAndResolve(list, result)
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for _, element := range sanitizedList {
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func sanitizeAndResolveNumerical(list []string, result *Result) (parameters []string, resolvedNumericalParameters []int64) {
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parameters, resolvedParameters := sanitizeAndResolve(list, result)
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for _, element := range resolvedParameters {
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if duration, err := time.ParseDuration(element); duration != 0 && err == nil {
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sanitizedNumbers = append(sanitizedNumbers, duration.Milliseconds())
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resolvedNumericalParameters = append(resolvedNumericalParameters, duration.Milliseconds())
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} else if number, err := strconv.ParseInt(element, 10, 64); err != nil {
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// Default to 0 if the string couldn't be converted to an integer
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sanitizedNumbers = append(sanitizedNumbers, 0)
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resolvedNumericalParameters = append(resolvedNumericalParameters, 0)
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} else {
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sanitizedNumbers = append(sanitizedNumbers, number)
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resolvedNumericalParameters = append(resolvedNumericalParameters, number)
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}
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}
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return sanitizedNumbers
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return parameters, resolvedNumericalParameters
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}
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func prettifyNumericalParameters(parameters []string, resolvedParameters []int64, operator string) string {
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return prettify(parameters, []string{strconv.Itoa(int(resolvedParameters[0])), strconv.Itoa(int(resolvedParameters[1]))}, operator)
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}
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func prettify(parameters []string, resolvedParameters []string, operator string) string {
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// Since, in the event of an invalid path, the resolvedParameters also contain the condition itself,
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// we'll return the resolvedParameters as-is.
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if strings.HasSuffix(resolvedParameters[0], InvalidConditionElementSuffix) || strings.HasSuffix(resolvedParameters[1], InvalidConditionElementSuffix) {
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return fmt.Sprintf("%v %s %v", resolvedParameters[0], operator, resolvedParameters[1])
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}
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// First element is a placeholder
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if parameters[0] != resolvedParameters[0] && parameters[1] == resolvedParameters[1] {
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return fmt.Sprintf("%v (%v) %s %v", parameters[0], resolvedParameters[0], operator, resolvedParameters[1])
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}
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// Second element is a placeholder
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if parameters[0] == resolvedParameters[0] && parameters[1] != resolvedParameters[1] {
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return fmt.Sprintf("%v %s %v (%v)", resolvedParameters[0], operator, parameters[1], resolvedParameters[1])
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}
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// Both elements are placeholders...?
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if parameters[0] != resolvedParameters[0] && parameters[1] != resolvedParameters[1] {
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return fmt.Sprintf("%v (%v) %s %v (%v)", parameters[0], resolvedParameters[0], operator, parameters[1], resolvedParameters[1])
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}
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// Neither elements are placeholders
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return fmt.Sprintf("%v %s %v", parameters[0], operator, parameters[1])
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}
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57
core/condition_bench_test.go
Normal file
57
core/condition_bench_test.go
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@ -0,0 +1,57 @@
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package core
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import "testing"
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func BenchmarkCondition_evaluateWithBodyStringAny(b *testing.B) {
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condition := Condition("[BODY].name == any(john.doe, jane.doe)")
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for n := 0; n < b.N; n++ {
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result := &Result{Body: []byte("{\"name\": \"john.doe\"}")}
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condition.evaluate(result)
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}
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b.ReportAllocs()
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}
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func BenchmarkCondition_evaluateWithBodyStringAnyFailure(b *testing.B) {
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condition := Condition("[BODY].name == any(john.doe, jane.doe)")
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for n := 0; n < b.N; n++ {
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result := &Result{Body: []byte("{\"name\": \"bob.doe\"}")}
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condition.evaluate(result)
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}
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b.ReportAllocs()
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}
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func BenchmarkCondition_evaluateWithBodyString(b *testing.B) {
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condition := Condition("[BODY].name == john.doe")
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for n := 0; n < b.N; n++ {
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result := &Result{Body: []byte("{\"name\": \"john.doe\"}")}
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condition.evaluate(result)
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}
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b.ReportAllocs()
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}
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func BenchmarkCondition_evaluateWithBodyStringFailure(b *testing.B) {
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condition := Condition("[BODY].name == john.doe")
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for n := 0; n < b.N; n++ {
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result := &Result{Body: []byte("{\"name\": \"bob.doe\"}")}
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condition.evaluate(result)
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}
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b.ReportAllocs()
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}
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func BenchmarkCondition_evaluateWithStatus(b *testing.B) {
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condition := Condition("[STATUS] == 200")
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for n := 0; n < b.N; n++ {
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result := &Result{HTTPStatus: 200}
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condition.evaluate(result)
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}
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b.ReportAllocs()
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}
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func BenchmarkCondition_evaluateWithStatusFailure(b *testing.B) {
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condition := Condition("[STATUS] == 200")
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for n := 0; n < b.N; n++ {
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result := &Result{HTTPStatus: 400}
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condition.evaluate(result)
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}
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b.ReportAllocs()
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}
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@ -322,6 +322,53 @@ func TestCondition_evaluateWithStatusPatternFailure(t *testing.T) {
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}
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}
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func TestCondition_evaluateWithBodyStringAny(t *testing.T) {
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condition := Condition("[BODY].name == any(john.doe, jane.doe)")
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result := &Result{Body: []byte("{\"name\": \"john.doe\"}")}
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condition.evaluate(result)
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if !result.ConditionResults[0].Success {
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t.Errorf("Condition '%s' should have been a success", condition)
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}
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result = &Result{Body: []byte("{\"name\": \"jane.doe\"}")}
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condition.evaluate(result)
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if !result.ConditionResults[0].Success {
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t.Errorf("Condition '%s' should have been a success", condition)
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}
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}
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func TestCondition_evaluateWithBodyStringAnyFailure(t *testing.T) {
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condition := Condition("[BODY].name == any(john.doe, jane.doe)")
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result := &Result{Body: []byte("{\"name\": \"bob.doe\"}")}
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condition.evaluate(result)
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if result.ConditionResults[0].Success {
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t.Errorf("Condition '%s' should have been a failure", condition)
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}
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}
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func TestCondition_evaluateWithStatusAny(t *testing.T) {
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condition := Condition("[STATUS] == any(200, 429)")
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statuses := []int{200, 429}
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for _, status := range statuses {
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result := &Result{HTTPStatus: status}
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condition.evaluate(result)
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if !result.ConditionResults[0].Success {
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t.Errorf("Condition '%s' should have been a success", condition)
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}
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}
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}
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func TestCondition_evaluateWithStatusAnyFailure(t *testing.T) {
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condition := Condition("[STATUS] == any(200, 429)")
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statuses := []int{201, 400, 404, 500}
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for _, status := range statuses {
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result := &Result{HTTPStatus: status}
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condition.evaluate(result)
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if result.ConditionResults[0].Success {
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t.Errorf("Condition '%s' should have been a failure", condition)
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}
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}
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}
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func TestCondition_evaluateWithConnected(t *testing.T) {
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condition := Condition("[CONNECTED] == true")
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result := &Result{Connected: true}
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