Fixes oapi-codegen#17

Parameters should be unscaped before being sent for validation.
gorillamux returns escaped parameters, but openapi3filter expects
unescaped parameters.

Author: florentchauveau

oapi_validate.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"log"
 	"net/http"
+	"net/url"
 	"os"
 	"strings"
 
@@ -128,6 +129,14 @@ func ValidateRequestFromContext(ctx echo.Context, router routers.Router, options
 		}
 	}
 
+	// because gorillamux.NewRouter() uses mux.NewRouter().UseEncodedPath()
+	// we need to unescape the path parameters for openapi3filter
+	for k, v := range pathParams {
+		if v, err := url.PathUnescape(v); err == nil {
+			pathParams[k] = v
+		}
+	}
+
 	validationInput := &openapi3filter.RequestValidationInput{
 		Request:    req,
 		PathParams: pathParams,