fixed issue with xml signature reading

README.md

@@ -10,6 +10,10 @@ Official GPX format is on [topografix](https://www.topografix.com/GPX/1/1/) site
 
 ## Changelog
 
+### 2023-03-26
+
+1) Fixed signature reading
+
 ### 2023-02-13
 
 1) Fixed missed extensions

src/main/kotlin/me/bvn13/sdk/android/gpx/GpxReader.kt

@@ -33,9 +33,7 @@ class GpxReader {
             .trim()
             .replace("'", "\"")
             .replace(" ?", "?")
-        if (GpxConstant.HEADER != signaturePrepared
-            && GpxConstant.HEADER_EXTENDED != signaturePrepared
-        ) {
+        if (!signaturePrepared.startsWith("<?xml") || !signaturePrepared.endsWith("?>")) {
             throw IllegalArgumentException("Wrong xml signature!")
         }
         return readBeginning(dis, Container.empty(container.position))

src/test/kotlin/me/bvn13/sdk/android/gpx/GpxReaderTest.kt

@@ -430,4 +430,84 @@ class GpxReaderTest {
         Assertions.assertEquals(20, gpxType.trk?.get(0)?.trkseg?.get(0)?.trkpt?.size ?: 0)
         Assertions.assertEquals(4, gpxType.trk?.get(0)?.trkseg?.get(0)?.trkpt?.get(0)?.extensions?.size ?: 0)
     }
+
+    @DisplayName("Read track-2023-03-09--21-10-54.gpx")
+    @Test
+    fun readTestGpx_v_1_10_3() {
+        val gpxType = GpxType.read(javaClass.classLoader.getResource("track-2023-03-09--21-10-54.gpx").openStream())
+        Assertions.assertEquals(4, gpxType.trk?.get(0)?.trkseg?.get(0)?.trkpt?.get(0)?.extensions?.size ?: 0)
+    }
+
+    @DisplayName("test xml signature")
+    @Test
+    fun testXmlSignature() {
+        val gpx = """<gpx
+            xmlns="http://www.topografix.com/GPX/1/1"
+            version="1.1"
+            creator="me.bvn13.sdk.android.gpx"
+            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+            xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd">
+            <time>2022-09-24T15:04:00+03:00</time>
+            <metadata>
+            <name>test name</name>
+            <desc></desc>
+            <author>
+            <name></name>
+            </author>
+            </metadata>
+            <trk>
+            <name>track1</name>
+            <trkseg>
+            <trkpt lat="123.0" lon="321.0">
+            </trkpt>
+            </trkseg>
+            </trk>
+            </gpx>"""
+        GpxType.read("""
+            <?xml version="1.0" standalone="yes" encoding="UTF-8"?>
+            $gpx
+            """.trim()
+            .lineSequence()
+            .map {
+                it.trim()
+            }
+            .joinToString("\n")
+            .byteInputStream()
+        )
+        GpxType.read("""
+            <?xml version="1.0" encoding="UTF-8"?>
+            $gpx
+            """.trim()
+            .lineSequence()
+            .map {
+                it.trim()
+            }
+            .joinToString("\n")
+            .byteInputStream()
+        )
+        GpxType.read(
+            """
+            <?xml version="1.0"?>
+            $gpx
+            """.trim()
+                .lineSequence()
+                .map {
+                    it.trim()
+                }
+                .joinToString("\n")
+                .byteInputStream()
+        )
+        GpxType.read(
+            """
+            <?xml?>
+            $gpx
+            """.trim()
+                .lineSequence()
+                .map {
+                    it.trim()
+                }
+                .joinToString("\n")
+                .byteInputStream()
+        )
+    }
 }