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Fix invalid invocations of errors.LineTooLong. #1335

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merged 1 commit into from
Nov 1, 2016

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filmor
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@filmor filmor commented Oct 26, 2016

What do these changes do?

Fix unhelpful messages on LineTooLong exceptions due to invalid or incomplete calls to their constructor.

Are there changes in behavior for the user?

Only in the message that they see in this case.

Related issue number

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  • Unit tests for the changes exist
  • Documentation reflects the changes
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    • Choose any open position to avoid merge conflicts with other PRs.
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@@ -102,7 +102,8 @@ def parse_headers(self, lines):
header_length += len(line)
if header_length > self.max_field_size:
raise errors.LineTooLong(
'limit request headers fields size')
'request header field %s' % bname.decode("utf8"),
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bname.decode('utf-8') can fail with own exception

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Can it though? This is caught before by "Invalid Header". Changed it anyhow :)

@@ -113,7 +114,8 @@ def parse_headers(self, lines):
else:
if header_length > self.max_field_size:
raise errors.LineTooLong(
'limit request headers fields size')
'request header field %s' % bname.decode("utf8"),
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same as above

@@ -173,7 +175,7 @@ def __call__(self, out, buf):
raw_data = yield from buf.readuntil(
b'\r\n\r\n', self.max_headers)
except errors.LineLimitExceededParserError as exc:
raise errors.LineTooLong(exc.limit) from None
raise errors.LineTooLong('request header', exc.limit) from None
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this looks inconvenient: LineTooLong above is raised with single argument (formated string) and with two args here

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It's not, and the call here is wrong. Check out the constructor of LineTooLong (didn't change that one), it expects a "reason" and a limit that was exceeded. The way this was passed before resulted in a broken error message like "400 got more than Unknown bytes when reading 32768" when it should have read "400 got more than 32768 when reading request header".

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true, missed that one.

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filmor commented Oct 26, 2016

I'll fix the failing tests and add some more.

@filmor filmor changed the title Fix invalid invocations of errors.LineTooLong. [WIP] Fix invalid invocations of errors.LineTooLong. Oct 26, 2016
@filmor filmor changed the title [WIP] Fix invalid invocations of errors.LineTooLong. Fix invalid invocations of errors.LineTooLong. Oct 26, 2016
@asvetlov asvetlov merged commit f5cab5b into aio-libs:master Nov 1, 2016
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asvetlov commented Nov 1, 2016

Thanks!

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3 participants