Fixed #176 and made tests run in Python 2.7 (which is what the #176 b…

…ug was about).

tests/test_0001-source-class.py

@@ -169,14 +169,14 @@ def test_http_port():
 @pytest.mark.network
 def test_http_size():
     with uproot4.source.http.HTTPSource(
-        "https://scikit-hep.org/uproot/examples/Zmumu.root",
+        "https://scikit-hep.org/uproot3/examples/Zmumu.root",
         timeout=10,
         num_fallback_workers=1,
     ) as source:
         size1 = source.num_bytes
 
     with uproot4.source.http.MultithreadedHTTPSource(
-        "https://scikit-hep.org/uproot/examples/Zmumu.root", num_workers=1, timeout=10
+        "https://scikit-hep.org/uproot3/examples/Zmumu.root", num_workers=1, timeout=10
     ) as source:
         size2 = source.num_bytes
 
@@ -186,14 +186,14 @@ def test_http_size():
 @pytest.mark.network
 def test_http_size_port():
     with uproot4.source.http.HTTPSource(
-        "https://scikit-hep.org:443/uproot/examples/Zmumu.root",
+        "https://scikit-hep.org:443/uproot3/examples/Zmumu.root",
         timeout=10,
         num_fallback_workers=1,
     ) as source:
         size1 = source.num_bytes
 
     with uproot4.source.http.MultithreadedHTTPSource(
-        "https://scikit-hep.org:443/uproot/examples/Zmumu.root",
+        "https://scikit-hep.org:443/uproot3/examples/Zmumu.root",
         num_workers=1,
         timeout=10,
     ) as source:
@@ -217,7 +217,7 @@ def test_http_fail():
 def test_no_multipart():
     for num_workers in [1, 2]:
         with uproot4.source.http.MultithreadedHTTPSource(
-            "https://scikit-hep.org/uproot/examples/Zmumu.root",
+            "https://scikit-hep.org/uproot3/examples/Zmumu.root",
             num_workers=num_workers,
             timeout=10,
         ) as source:
@@ -246,7 +246,7 @@ def test_no_multipart_fail():
 def test_fallback():
     for num_workers in [1, 2]:
         with uproot4.source.http.HTTPSource(
-            "https://scikit-hep.org/uproot/examples/Zmumu.root",
+            "https://scikit-hep.org/uproot3/examples/Zmumu.root",
             timeout=10,
             num_fallback_workers=num_workers,
         ) as source:

tests/test_0006-notify-when-downloaded.py

@@ -126,7 +126,7 @@ def test_http_workers():
 def test_http_fallback():
     notifications = queue.Queue()
     with uproot4.source.http.HTTPSource(
-        "https://scikit-hep.org/uproot/examples/Zmumu.root",
+        "https://scikit-hep.org/uproot3/examples/Zmumu.root",
         timeout=10,
         num_fallback_workers=1,
     ) as source:
@@ -143,7 +143,7 @@ def test_http_fallback():
 def test_http_fallback_workers():
     notifications = queue.Queue()
     with uproot4.source.http.HTTPSource(
-        "https://scikit-hep.org/uproot/examples/Zmumu.root",
+        "https://scikit-hep.org/uproot3/examples/Zmumu.root",
         timeout=10,
         num_fallback_workers=5,
     ) as source:

tests/test_0045-lazy-arrays-1.py

@@ -151,7 +151,8 @@ def test_awkward_pluralization():
 
 
 def test_lazy_called_on_nonexistent_file():
+    awkward1 = pytest.importorskip("awkward1")
     filename = "nonexistent_file.root"
-    with pytest.raises(FileNotFoundError) as excinfo:
+    with pytest.raises(uproot4._util._FileNotFoundError) as excinfo:
         uproot4.lazy(filename)
     assert filename in str(excinfo.value)

tests/test_0066-fix-http-fallback-freeze.py

@@ -11,7 +11,7 @@
 @pytest.mark.network
 def test():
     with uproot4.open(
-        {"http://scikit-hep.org/uproot/examples/HZZ.root": "events"}
+        {"http://scikit-hep.org/uproot3/examples/HZZ.root": "events"}
     ) as t:
-        t["MET_px"].array()
-        t["MET_py"].array()
+        t["MET_px"].array(library="np")
+        t["MET_py"].array(library="np")

tests/test_0088-read-with-http.py

@@ -16,6 +16,16 @@ def test_issue176():
         assert len(data) == 100000
 
 
+@pytest.mark.network
+def test_issue176_again():
+    with uproot4.open(
+        "https://starterkit.web.cern.ch/starterkit/data/advanced-python-2019/dalitzdata.root"
+    ) as f:
+        data = f["tree"].arrays(["Y1", "Y2"], library="np")
+        assert len(data["Y1"]) == 100000
+        assert len(data["Y2"]) == 100000
+
+
 @pytest.mark.network
 def test_issue121():
     with uproot4.open(

tests/test_0172-allow-allocators-in-vector-typenames.py

@@ -15,4 +15,4 @@ def test():
         assert (
             t["rec_part_px_VecOps"].typename == "std::vector<float>"
         )  # without the allocator
-        t["rec_part_px_VecOps"].array()
+        t["rec_part_px_VecOps"].array(library="np")

tests/test_0173-empty-and-multiprocessing-bugs.py

@@ -23,7 +23,7 @@ def readone(filename):
         f.decompression_executor = uproot4.ThreadPoolExecutor()
         t = f["events"]
         b = t["px1"]
-        b.array()
+        b.array(library="np")
 
 
 def test_multiprocessing():

tests/test_0182-complain-about-missing-files.py

@@ -15,9 +15,12 @@ def test():
     bad = one.replace(".root", "-DOES-NOT-EXIST.root")
     okay = one.replace(".root", "-DOES-NOT-EXIST-*.root")
 
-    assert len(list(uproot4.iterate([one, two], step_size="1 TB"))) == 2
+    assert len(list(uproot4.iterate([one, two], step_size="1 TB", library="np"))) == 2
 
     with pytest.raises(uproot4._util._FileNotFoundError):
-        list(uproot4.iterate([one, two, bad]))
+        list(uproot4.iterate([one, two, bad], library="np"))
 
-    assert len(list(uproot4.iterate([one, two, okay], step_size="1 TB"))) == 2
+    assert (
+        len(list(uproot4.iterate([one, two, okay], step_size="1 TB", library="np")))
+        == 2
+    )

uproot4/source/http.py

@@ -372,8 +372,13 @@ def handle_multipart(self, source, futures, results, response):
         Helper function for :py:meth:`~uproot4.source.http.HTTPResource.multifuture`
         to handle the multipart GET response.
         """
+        if hasattr(response, "readline"):
+            response_buffer = response
+        else:
+            response_buffer = _ResponseBuffer(response)
+
         for i in uproot4._util.range(len(futures)):
-            range_string, size = self.next_header(response)
+            range_string, size = self.next_header(response_buffer)
             if range_string is None:
                 raise OSError(
                     """found {0} of {1} expected headers in HTTP multipart
@@ -397,7 +402,7 @@ def handle_multipart(self, source, futures, results, response):
                 )
 
             length = stop - start
-            results[start, stop] = response.read(length)
+            results[start, stop] = response_buffer.read(length)
 
             if len(results[start, stop]) != length:
                 raise OSError(
@@ -413,12 +418,12 @@ def handle_multipart(self, source, futures, results, response):
 
             future._run(self)
 
-    def next_header(self, response):
+    def next_header(self, response_buffer):
         """
         Helper function for :py:meth:`~uproot4.source.http.HTTPResource.multifuture`
-        to return the next header from the ``response``.
+        to return the next header from the ``response_buffer``.
         """
-        line = response.fp.readline()
+        line = response_buffer.readline()
         range_string, size = None, None
         while range_string is None:
             m = self._content_range_size.match(line)
@@ -430,7 +435,7 @@ def next_header(self, response):
                 if m is not None:
                     range_string = m.group(1)
                     size = None
-            line = response.fp.readline()
+            line = response_buffer.readline()
             if len(line.strip()) == 0:
                 break
         return range_string, size
@@ -452,6 +457,39 @@ def task(resource):
         return uproot4.source.futures.ResourceFuture(task)
 
 
+class _ResponseBuffer(object):
+    CHUNK = 1024
+
+    def __init__(self, stream):
+        self.already_read = b""
+        self.stream = stream
+
+    def read(self, length):
+        if length < len(self.already_read):
+            out = self.already_read[:length]
+            self.already_read = self.already_read[length:]
+            return out
+
+        elif len(self.already_read) > 0:
+            out = self.already_read
+            self.already_read = b""
+            return out + self.stream.read(length - len(out))
+
+        else:
+            return self.stream.read(length)
+
+    def readline(self):
+        while True:
+            try:
+                index = self.already_read.index(b"\n")
+            except ValueError:
+                self.already_read = self.already_read + self.stream.read(self.CHUNK)
+            else:
+                out = self.already_read[: index + 1]
+                self.already_read = self.already_read[index + 1 :]
+                return out
+
+
 class HTTPSource(uproot4.source.chunk.Source):
     """
     Args: