Merge pull request #133 from rayvincent2/feature/add-urn-reference-support

Add support for urn document references

CMakeLists.txt

@@ -95,7 +95,8 @@ if(valijson_BUILD_TESTS)
 
     set(TEST_SOURCES
         tests/test_adapter_comparison.cpp
-        tests/test_fetch_document_callback.cpp
+        tests/test_fetch_urn_document_callback.cpp
+        tests/test_fetch_absolute_uri_document_callback.cpp
         tests/test_json_pointer.cpp
         tests/test_json11_adapter.cpp
         tests/test_jsoncpp_adapter.cpp

include/valijson/internal/uri.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <regex>
 #include <string>
 
 namespace valijson {
@@ -18,6 +19,18 @@ inline bool isUriAbsolute(const std::string &documentUri)
     return documentUri.find(placeholderMarker) != std::string::npos;
 }
 
+/**
+ * @brief  Placeholder function to check whether a URI is a URN
+ *
+ * This function validates that the URI matches the RFC 8141 spec
+ */
+inline bool isUrn(const std::string &documentUri) {
+  static const std::regex pattern(
+      "^((urn)|(URN)):(?!urn:)([a-zA-Z0-9][a-zA-Z0-9-]{1,31})(:[-a-zA-Z0-9\\\\._~%!$&'()\\/*+,;=]+)+(\\?[-a-zA-Z0-9\\\\._~%!$&'()\\/*+,;:=]+){0,1}(#[-a-zA-Z0-9\\\\._~%!$&'()\\/*+,;:=]+){0,1}$");
+
+  return std::regex_match(documentUri, pattern);
+}
+
 /**
  * Placeholder function to resolve a relative URI within a given scope
  */

include/valijson/schema_parser.hpp

@@ -200,7 +200,7 @@ private:
     {
         if (resolutionScope) {
             if (documentUri) {
-                if (internal::uri::isUriAbsolute(*documentUri)) {
+                if (internal::uri::isUriAbsolute(*documentUri) || internal::uri::isUrn(*documentUri)) {
                     return *documentUri;
                 } else {
                     return internal::uri::resolveRelativeUri(*resolutionScope, *documentUri);
@@ -210,6 +210,8 @@ private:
             }
         } else if (documentUri && internal::uri::isUriAbsolute(*documentUri)) {
             return *documentUri;
+        } else if (documentUri && internal::uri::isUrn(*documentUri)) {
+            return *documentUri;
         } else {
             return opt::optional<std::string>();
         }
@@ -600,7 +602,7 @@ private:
         if ((itr = object.find("id")) != object.end() && itr->second.maybeString()) {
             const std::string id = itr->second.asString();
             rootSchema.setSubschemaId(&subschema, itr->second.asString());
-            if (!currentScope || internal::uri::isUriAbsolute(id)) {
+            if (!currentScope || internal::uri::isUriAbsolute(id) || internal::uri::isUrn(id)) {
                 updatedScope = id;
             } else {
                 updatedScope = internal::uri::resolveRelativeUri(*currentScope, id);
@@ -993,7 +995,7 @@ private:
         const std::string actualJsonPointer = sanitiseJsonPointer(
                 internal::json_reference::getJsonReferencePointer(jsonRef));
 
-        if (documentUri && internal::uri::isUriAbsolute(*documentUri)) {
+        if (documentUri && (internal::uri::isUriAbsolute(*documentUri) || internal::uri::isUrn(*documentUri))) {
             // Resolve reference against remote document
             if (!fetchDoc) {
                 throwRuntimeError("Fetching of remote JSON References not enabled.");

tests/test_fetch_absolute_uri_document_callback.cpp

@@ -12,12 +12,12 @@ using valijson::SchemaParser;
 using valijson::adapters::RapidJsonAdapter;
 using valijson::Validator;
 
-class TestFetchDocumentCallback : public ::testing::Test
+class TestFetchAbsoluteUriDocumentCallback : public ::testing::Test
 {
 
 };
 
-const rapidjson::Document * fetchDocument(const std::string &uri)
+const rapidjson::Document * fetchAbsoluteUriDocument(const std::string &uri)
 {
     EXPECT_STREQ("http://localhost:1234/", uri.c_str());
 
@@ -43,12 +43,12 @@ const rapidjson::Document * fetchDocument(const std::string &uri)
     return fetchedRoot;
 }
 
-void freeDocument(const rapidjson::Document *adapter)
+void freeAbsoluteUriDocument(const rapidjson::Document *adapter)
 {
     delete adapter;
 }
 
-TEST_F(TestFetchDocumentCallback, Basics)
+TEST_F(TestFetchAbsoluteUriDocumentCallback, Basics)
 {
     // Define schema
     rapidjson::Document schemaDocument;
@@ -60,8 +60,8 @@ TEST_F(TestFetchDocumentCallback, Basics)
     // Parse schema document
     Schema schema;
     SchemaParser schemaParser;
-    schemaParser.populateSchema(schemaDocumentAdapter, schema, fetchDocument,
+    schemaParser.populateSchema(schemaDocumentAdapter, schema, fetchAbsoluteUriDocument,
-            freeDocument);
+            freeAbsoluteUriDocument);
 
     // Test resulting schema with a valid document
     rapidjson::Document validDocument;

tests/test_fetch_urn_document_callback.cpp

@@ -0,0 +1,80 @@
+
+#include <gtest/gtest.h>
+
+#include <valijson/adapters/rapidjson_adapter.hpp>
+
+#include <valijson/schema.hpp>
+#include <valijson/schema_parser.hpp>
+#include <valijson/validator.hpp>
+
+using valijson::Schema;
+using valijson::SchemaParser;
+using valijson::adapters::RapidJsonAdapter;
+using valijson::Validator;
+
+class TestFetchUrnDocumentCallback : public ::testing::Test
+{
+
+};
+
+const rapidjson::Document * fetchUrnDocument(const std::string &uri)
+{
+    EXPECT_STREQ("urn:mvn:example.schema.common:status:1.1.0", uri.c_str());
+
+    rapidjson::Document *fetchedRoot = new rapidjson::Document();
+    fetchedRoot->SetObject();
+
+    rapidjson::Value valueOfTypeAttribute;
+    valueOfTypeAttribute.SetString("string", fetchedRoot->GetAllocator());
+
+    rapidjson::Value schemaOfTestProperty;
+    schemaOfTestProperty.SetObject();
+    schemaOfTestProperty.AddMember("type", valueOfTypeAttribute,
+            fetchedRoot->GetAllocator());
+
+    rapidjson::Value propertiesConstraint;
+    propertiesConstraint.SetObject();
+    propertiesConstraint.AddMember("test", schemaOfTestProperty,
+            fetchedRoot->GetAllocator());
+
+    fetchedRoot->AddMember("properties", propertiesConstraint,
+            fetchedRoot->GetAllocator());
+
+    return fetchedRoot;
+}
+
+void freeUrnDocument(const rapidjson::Document *adapter)
+{
+    delete adapter;
+}
+
+TEST_F(TestFetchUrnDocumentCallback, Basics)
+{
+    // Define schema
+    rapidjson::Document schemaDocument;
+    RapidJsonAdapter schemaDocumentAdapter(schemaDocument);
+    schemaDocument.SetObject();
+    schemaDocument.AddMember("$ref", "urn:mvn:example.schema.common:status:1.1.0",
+            schemaDocument.GetAllocator());
+
+    // Parse schema document
+    Schema schema;
+    SchemaParser schemaParser;
+    schemaParser.populateSchema(schemaDocumentAdapter, schema, fetchUrnDocument,
+            freeUrnDocument);
+
+    // Test resulting schema with a valid document
+    rapidjson::Document validDocument;
+    validDocument.SetObject();
+    validDocument.AddMember("test", "valid", schemaDocument.GetAllocator());
+    Validator validator;
+    EXPECT_TRUE(validator.validate(schema, RapidJsonAdapter(validDocument),
+            NULL));
+
+    // Test resulting schema with an invalid document
+    rapidjson::Document invalidDocument;
+    invalidDocument.SetObject();
+    invalidDocument.AddMember("test", 123, schemaDocument.GetAllocator());
+    EXPECT_FALSE(validator.validate(schema, RapidJsonAdapter(invalidDocument),
+            NULL));
+}