src: added URL::FromFilePath method

Method returns file URL from native file path.

Backport-PR-URL: #22918
PR-URL: #22251
Reviewed-By: Eugene Ostroukhov <[email protected]>
Reviewed-By: Tiancheng "Timothy" Gu <[email protected]>

Author: alexkozy

src/node_url.cc

@@ -2348,6 +2348,19 @@ std::string URL::ToFilePath() const {
 #endif
 }
 
+URL URL::FromFilePath(const std::string& file_path) {
+  URL url("file://");
+  std::string escaped_file_path;
+  for (size_t i = 0; i < file_path.length(); ++i) {
+    escaped_file_path += file_path[i];
+    if (file_path[i] == '%')
+      escaped_file_path += "25";
+  }
+  URL::Parse(escaped_file_path.c_str(), escaped_file_path.length(), kPathStart,
+             &url.context_, true, nullptr, false);
+  return url;
+}
+
 // This function works by calling out to a JS function that creates and
 // returns the JS URL object. Be mindful of the JS<->Native boundary
 // crossing that is required.

src/node_url.h

@@ -169,6 +169,8 @@ class URL {
   // Get the path of the file: URL in a format consumable by native file system
   // APIs. Returns an empty string if something went wrong.
   std::string ToFilePath() const;
+  // Get the file URL from native file system path.
+  static URL FromFilePath(const std::string& file_path);
 
   const Local<Value> ToObject(Environment* env) const;
 

test/cctest/test_url.cc

@@ -109,3 +109,36 @@ TEST_F(URLTest, ToFilePath) {
 
 #undef T
 }
+
+TEST_F(URLTest, FromFilePath) {
+  URL file_url;
+#ifdef _WIN32
+  file_url = URL::FromFilePath("C:\\Program Files\\");
+  EXPECT_EQ("file:", file_url.protocol());
+  EXPECT_EQ("/C:/Program%20Files/", file_url.path());
+
+  file_url = URL::FromFilePath("C:\\a\\b\\c");
+  EXPECT_EQ("file:", file_url.protocol());
+  EXPECT_EQ("/C:/a/b/c", file_url.path());
+
+  file_url = URL::FromFilePath("b:\\a\\%%.js");
+  EXPECT_EQ("file:", file_url.protocol());
+  EXPECT_EQ("/b:/a/%25%25.js", file_url.path());
+
+  file_url = URL::FromFilePath("\\\\host\\a\\b\\c");
+  EXPECT_EQ("file:", file_url.protocol());
+  EXPECT_EQ("host/a/b/c", file_url.path());
+#else
+  file_url = URL::FromFilePath("/");
+  EXPECT_EQ("file:", file_url.protocol());
+  EXPECT_EQ("/", file_url.path());
+
+  file_url = URL::FromFilePath("/a/b/c");
+  EXPECT_EQ("file:", file_url.protocol());
+  EXPECT_EQ("/a/b/c", file_url.path());
+
+  file_url = URL::FromFilePath("/a/%%.js");
+  EXPECT_EQ("file:", file_url.protocol());
+  EXPECT_EQ("/a/%25%25.js", file_url.path());
+#endif
+}