Support /vsi content with readers.copc and readers.ept (PDAL#4741)

* defer to FileUtils to support /vsi content with readers.copc and readers.ept

* add a /vsi test for readers.copc to test both code paths

Author: hobu

io/private/connector/Connector.cpp

@@ -180,19 +180,20 @@ std::vector<char> Connector::getBinary(uint64_t offset, int32_t size) const
     if (size <= 0)
         return std::vector<char>();
 
-    if (m_arbiter->isLocal(m_filename))
+    if (Utils::startsWith(Utils::toupper(m_filename), "/VSI") || m_arbiter->isLocal(m_filename))
     {
         std::vector<char> buf(size);
-        std::ifstream in(m_filename, std::ios::binary);
-        if (in.fail() )
+        std::istream* in = FileUtils::openFile(m_filename);
+        if (in->fail() )
         {
             std::string message = "Unable to open '" + m_filename + "'.";
             if (!pdal::FileUtils::fileExists(m_filename))
                 message += " File does not exist.";
             throw pdal_error(message);
         }
-        in.seekg(offset);
-        in.read(buf.data(), size);
+        in->seekg(offset);
+        in->read(buf.data(), size);
+        delete in;
         return buf;
     }
     else

test/unit/io/CopcReaderTest.cpp

@@ -698,4 +698,48 @@ TEST(CopcReaderTest, boundedpreview)
     EXPECT_EQ(pdal::Bounds(bounds).to2d(), pdal::Bounds(bounds3d).to2d());
 }
 
+void testURLs(const std::string& url, const BOX2D& bounds)
+{
+
+    CopcReader reader;
+    {
+        Options options;
+        options.add("bounds", bounds);
+        options.add("filename", url);
+        options.add("resolution", 1000);
+
+        reader.setOptions(options);
+    }
+
+    pdal::QuickInfo qi(reader.preview());
+    EXPECT_EQ(61201, qi.m_pointCount);
+
+    pdal::BOX3D bounds3d = qi.m_bounds;
+    EXPECT_EQ(pdal::Bounds(bounds).to2d(), pdal::Bounds(bounds3d).to2d());
+
+}
+
+
+TEST(CopcReaderTest, vsi)
+{
+
+    /*
+          "maxx": 639003.73,
+          "maxy": 853534.37,
+          "maxz": 615.26,
+          "minx": 635579.2,
+          "miny": 848887.49,
+          "minz": 406.56
+    */
+
+    BOX2D bounds(635700,848900, 637000, 853300);
+    std::string url( "https://github.com/PDAL/data/raw/refs/heads/main/autzen/autzen-classified.copc.laz");
+    std::string vsi ("/vsicurl/"+url);
+
+    testURLs(url, bounds);
+    testURLs(vsi, bounds);
+
+
+}
+
 } // namespace pdal