Add unit test for Lynx browser POST

content.py

@@ -1497,6 +1497,7 @@ def extract_text_fields_in_post(post_bytes, boundary: str, debug: bool,
     )
     if debug:
         print('DEBUG: POST message_fields: ' + str(message_fields))
+    lynx_content_type = 'Content-Type: text/plain; charset=utf-8'
     # examine each section of the POST, separated by the boundary
     for fld in message_fields:
         if fld == '--':
@@ -1508,6 +1509,9 @@ def extract_text_fields_in_post(post_bytes, boundary: str, debug: bool,
             continue
         post_key = post_str.split('"', 1)[0]
         post_value_str = post_str.split('"', 1)[1]
+        if boundary == '--LYNX':
+            post_value_str = \
+                post_value_str.replace(lynx_content_type, '')
         if ';' in post_value_str:
             if post_key not in fields_with_semicolon_allowed and \
                not post_key.startswith('edited'):

tests.py

@@ -5852,6 +5852,18 @@ def _test_extract_text_fields_from_post():
     assert fields['imageDescription'] == ''
     assert fields['message'] == 'This is a ; test'
 
+    boundary = '--LYNX'
+    form_data = '--LYNX\r\nContent-Disposition: form-data; ' + \
+        'name="fieldName"\r\nContent-Type: text/plain; ' + \
+        'charset=utf-8\r\nThis is a lynx test\r\n--LYNX\r\n' + \
+        'Content-Disposition: form-data; name="submitYes"\r\n' + \
+        'Content-Type: text/plain; charset=utf-8\r\nBUTTON\r\n--LYNX--\r\n'
+    debug = True
+    fields = extract_text_fields_in_post(None, boundary, debug, form_data)
+    print('fields: ' + str(fields))
+    assert fields['fieldName'] == 'This is a lynx test'
+    assert fields['submitYes'] == 'BUTTON'
+
 
 def _test_speaker_replace_link():
     print('testSpeakerReplaceLinks')