Fix `Couldn't parse: falling back to Raw` for empty JSON array (#6619)

#### Description

fix #6603 

#### Checklist

 - [x] I have updated tests where applicable.
 - [ ] I have added an entry to the CHANGELOG.

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

mitmproxy/contentviews/graphql.py

@@ -30,7 +30,12 @@ def is_graphql_query(data):
 
 
 def is_graphql_batch_query(data):
-    return isinstance(data, list) and isinstance(data[0], dict) and "query" in data[0]
+    return (
+        isinstance(data, list)
+        and len(data) > 0
+        and isinstance(data[0], dict)
+        and "query" in data[0]
+    )
 
 
 class ViewGraphQL(base.View):

test/mitmproxy/contentviews/test_graphql.py

@@ -19,6 +19,7 @@ def test_render_priority():
     assert 0 == v.render_priority(
         b"""[{"xquery": "query P { \\n }"}]""", content_type="application/json"
     )
+    assert 0 == v.render_priority(b"""[]""", content_type="application/json")
     assert 0 == v.render_priority(b"}", content_type="application/json")
 
 

test/mitmproxy/contentviews/test_json.py

@@ -78,6 +78,22 @@ def test_format_json():
         [("text", "    "), ("text", "]"), ("text", "")],
         [("text", ""), ("text", "}")],
     ]
+    assert list(json.format_json({"list": []})) == [
+        [("text", "{"), ("text", "")],
+        [
+            ("text", "    "),
+            ("Token_Name_Tag", '"list"'),
+            ("text", ": "),
+            ("text", "[]"),
+            ("text", ""),
+        ],
+        [("text", ""), ("text", "}")],
+    ]
+    assert list(json.format_json(None)) == [[("Token_Keyword_Constant", "null")]]
+    assert list(json.format_json(True)) == [[("Token_Keyword_Constant", "true")]]
+    assert list(json.format_json(1)) == [[("Token_Literal_Number", "1")]]
+    assert list(json.format_json("test")) == [[("Token_Literal_String", '"test"')]]
+    assert list(json.format_json([])) == [[("text", "[]")]]
 
 
 def test_view_json():
@@ -88,6 +104,7 @@ def test_view_json():
     assert v(b"[1, 2, 3, 4, 5]")
     assert v(b'{"foo" : 3}')
     assert v(b'{"foo": true, "nullvalue": null}')
+    assert v(b"[]")
 
 
 @given(binary())