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-rwxr-xr-xLib/cgi.py2
-rw-r--r--Lib/test/test_cgi.py46
-rw-r--r--Misc/NEWS2
3 files changed, 49 insertions, 1 deletions
diff --git a/Lib/cgi.py b/Lib/cgi.py
index e3cf33e..4de82ea 100755
--- a/Lib/cgi.py
+++ b/Lib/cgi.py
@@ -699,7 +699,7 @@ class FieldStorage:
self.encoding, self.errors)
self.bytes_read += part.bytes_read
self.list.append(part)
- if self.bytes_read >= self.length:
+ if part.done or self.bytes_read >= self.length > 0:
break
self.skip_lines()
diff --git a/Lib/test/test_cgi.py b/Lib/test/test_cgi.py
index 0a1e8d3..d80ec07 100644
--- a/Lib/test/test_cgi.py
+++ b/Lib/test/test_cgi.py
@@ -279,6 +279,27 @@ Content-Type: text/plain
check('x' * (maxline - 1) + '\r')
check('x' * (maxline - 1) + '\r' + 'y' * (maxline - 1))
+ def test_fieldstorage_multipart_w3c(self):
+ # Test basic FieldStorage multipart parsing (W3C sample)
+ env = {
+ 'REQUEST_METHOD': 'POST',
+ 'CONTENT_TYPE': 'multipart/form-data; boundary={}'.format(BOUNDARY_W3),
+ 'CONTENT_LENGTH': str(len(POSTDATA_W3))}
+ fp = BytesIO(POSTDATA_W3.encode('latin-1'))
+ fs = cgi.FieldStorage(fp, environ=env, encoding="latin-1")
+ self.assertEqual(len(fs.list), 2)
+ self.assertEqual(fs.list[0].name, 'submit-name')
+ self.assertEqual(fs.list[0].value, 'Larry')
+ self.assertEqual(fs.list[1].name, 'files')
+ files = fs.list[1].value
+ self.assertEqual(len(files), 2)
+ expect = [{'name': None, 'filename': 'file1.txt', 'value': b'... contents of file1.txt ...'},
+ {'name': None, 'filename': 'file2.gif', 'value': b'...contents of file2.gif...'}]
+ for x in range(len(files)):
+ for k, exp in expect[x].items():
+ got = getattr(files[x], k)
+ self.assertEqual(got, exp)
+
_qs_result = {
'key1': 'value1',
'key2': ['value2x', 'value2y'],
@@ -428,6 +449,31 @@ Content-Disposition: form-data; name="id"
-----------------------------721837373350705526688164684
"""
+# http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4
+BOUNDARY_W3 = "AaB03x"
+POSTDATA_W3 = """--AaB03x
+Content-Disposition: form-data; name="submit-name"
+
+Larry
+--AaB03x
+Content-Disposition: form-data; name="files"
+Content-Type: multipart/mixed; boundary=BbC04y
+
+--BbC04y
+Content-Disposition: file; filename="file1.txt"
+Content-Type: text/plain
+
+... contents of file1.txt ...
+--BbC04y
+Content-Disposition: file; filename="file2.gif"
+Content-Type: image/gif
+Content-Transfer-Encoding: binary
+
+...contents of file2.gif...
+--BbC04y--
+--AaB03x--
+"""
+
def test_main():
run_unittest(CgiTests)
diff --git a/Misc/NEWS b/Misc/NEWS
index 13694f5..d8a4ba0 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -142,6 +142,8 @@ Core and Builtins
Library
-------
+- Issue #18013: Fix cgi.FieldStorage to parse the W3C sample form.
+
- Issue #18020: improve html.escape speed by an order of magnitude.
Patch by Matt Bryant.