✨ Added param extractor

extractor.go

@@ -48,6 +48,8 @@ func createExtractors(lookups, authScheme string) ([]ValuesExtractor, error) {
 		switch parts[0] {
 		case "query":
 			extractors = append(extractors, valuesFromQuery(parts[1]))
+		case "param":
+			extractors = append(extractors, valuesFromParam(parts[1]))
 		case "cookie":
 			extractors = append(extractors, valuesFromCookie(parts[1]))
 		case "form":
@@ -121,6 +123,22 @@ func valuesFromQuery(param string) ValuesExtractor {
 	}
 }
 
+// valuesFromParam returns a function that extracts values from the url param string.
+func valuesFromParam(param string) ValuesExtractor {
+	return func(ctx *http.RequestCtx) ([][]byte, error) {
+		if !ctx.PostArgs().Has(param) {
+			return nil, errParamExtractorValueMissing
+		}
+
+		result := ctx.PostArgs().PeekMulti(param)
+		if len(result) > extractorLimit-1 {
+			result = result[:extractorLimit]
+		}
+
+		return result, nil
+	}
+}
+
 // valuesFromCookie returns a function that extracts values from the named cookie.
 func valuesFromCookie(name string) ValuesExtractor {
 	return func(ctx *http.RequestCtx) ([][]byte, error) {