KTOR-6709 Fix URLParserException on minimal file url (#4622)

15f09214 · Adrian · GitHub · 5ff1a3ca · 15f09214 · 15f09214
--- a/ktor-http/common/src/io/ktor/http/URLParser.kt
+++ b/ktor-http/common/src/io/ktor/http/URLParser.kt
@@ -136,6 +136,10 @@ internal fun URLBuilder.takeFromUnsafe(urlString: String): URLBuilder {

 private fun URLBuilder.parseFile(urlString: String, startIndex: Int, endIndex: Int, slashCount: Int) {
    when (slashCount) {
+        1 -> {
+            host = ""
+            encodedPath = urlString.substring(startIndex, endIndex)
+        }
        2 -> {
            val nextSlash = urlString.indexOf('/', startIndex)
            if (nextSlash == -1 || nextSlash == endIndex) {

--- a/ktor-http/common/test/io/ktor/tests/http/UrlTest.kt
+++ b/ktor-http/common/test/io/ktor/tests/http/UrlTest.kt
@@ -264,6 +264,15 @@ class UrlTest {
        assertEquals(expectedUrl, result.toString())
    }

+    @Test
+    fun testForFileProtocolMinimalRepresentation() {
+        val result = Url("file:/var/www")
+        assertEquals("file", result.protocol.name)
+        assertEquals("", result.host)
+        assertEquals(listOf("var", "www"), result.rawSegments)
+        assertEquals("file:///var/www", result.toString())
+    }
+
    @Test
    fun testForMailProtocol() {
        val expectedUrl = "mailto:abc@xyz.io"