OAS: handle urlencoded and multipart form data correctly (#730)

* Start with tests

* Expected file

* Almost works

* Make test stab;e

* 5 examples, not 6

* Add param type

* multipart example

* parsing multipart

* Commit

* Commit

* multipart

* Write encoding into schema

* Stable test

* Add reset

* Refactoring

* Refactoring

* Maintain the required flag

* lint

agent/pkg/oas/counters.go

@@ -1,6 +1,11 @@
 package oas
 
-import "math"
+import (
+	"fmt"
+	"github.com/chanced/openapi"
+	"math"
+	"strings"
+)
 
 type Counter struct {
 	Entries     int     `json:"entries"`
@@ -55,3 +60,56 @@ func (m *CounterMap) addOther(other *CounterMap) {
 		}
 	}
 }
+
+func setCounterMsgIfOk(oldStr string, cnt *Counter) string {
+	tpl := "Mizu observed %d entries (%d failed), at %.3f hits/s, average response time is %.3f seconds"
+	if oldStr == "" || (strings.HasPrefix(oldStr, "Mizu ") && strings.HasSuffix(oldStr, " seconds")) {
+		return fmt.Sprintf(tpl, cnt.Entries, cnt.Failures, cnt.SumDuration/float64(cnt.Entries), cnt.SumRT/float64(cnt.Entries))
+	}
+	return oldStr
+}
+
+type CounterMaps struct {
+	counterTotal    Counter
+	counterMapTotal CounterMap
+}
+
+func (m *CounterMaps) processOp(opObj *openapi.Operation) error {
+	if _, ok := opObj.Extensions.Extension(CountersTotal); ok {
+		counter := new(Counter)
+		err := opObj.Extensions.DecodeExtension(CountersTotal, counter)
+		if err != nil {
+			return err
+		}
+		m.counterTotal.addOther(counter)
+
+		opObj.Description = setCounterMsgIfOk(opObj.Description, counter)
+	}
+
+	if _, ok := opObj.Extensions.Extension(CountersPerSource); ok {
+		counterMap := new(CounterMap)
+		err := opObj.Extensions.DecodeExtension(CountersPerSource, counterMap)
+		if err != nil {
+			return err
+		}
+		m.counterMapTotal.addOther(counterMap)
+	}
+	return nil
+}
+
+func (m *CounterMaps) processOas(oas *openapi.OpenAPI) error {
+	if oas.Extensions == nil {
+		oas.Extensions = openapi.Extensions{}
+	}
+
+	err := oas.Extensions.SetExtension(CountersTotal, m.counterTotal)
+	if err != nil {
+		return err
+	}
+
+	err = oas.Extensions.SetExtension(CountersPerSource, m.counterMapTotal)
+	if err != nil {
+		return nil
+	}
+	return nil
+}