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Fix host parsing for IPv6 URI #1112

Merged
merged 6 commits into from
May 8, 2024
Merged

Fix host parsing for IPv6 URI #1112

merged 6 commits into from
May 8, 2024

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waahm7
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@waahm7 waahm7 commented May 8, 2024

Issue #, if available:

Description of changes:
If it's IPv6 literal uri like http://[::1]:80/path, the host is not [::1] and is ::1 only.
RFC: https://datatracker.ietf.org/doc/html/rfc3986#section-3.2.2
urllib3:
image

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

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codecov-commenter commented May 8, 2024

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.14%. Comparing base (6236599) to head (e65e3d4).

Additional details and impacted files
@@            Coverage Diff             @@
##             main    #1112      +/-   ##
==========================================
+ Coverage   83.12%   83.14%   +0.01%     
==========================================
  Files          56       56              
  Lines        5755     5760       +5     
==========================================
+ Hits         4784     4789       +5     
  Misses        971      971              

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@waahm7 waahm7 changed the title WIP | Fix host parsing for IPv6 URI Fix host parsing for IPv6 URI May 8, 2024
source/uri.c Outdated Show resolved Hide resolved
@@ -509,7 +509,7 @@ static int s_test_uri_ipv6_parse(struct aws_allocator *allocator, void *ctx) {
aws_byte_cursor_from_c_str("[2001:db8:85a3:8d3:1319:8a2e:370:7348%25en0]:443");
ASSERT_BIN_ARRAYS_EQUALS(expected_authority.ptr, expected_authority.len, uri.authority.ptr, uri.authority.len);

struct aws_byte_cursor expected_host = aws_byte_cursor_from_c_str("[2001:db8:85a3:8d3:1319:8a2e:370:7348%25en0]");
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can you also verify, whether we should be stripping zone idx or not? what do other libs do?

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It is included
image

source/uri.c Outdated
if (!port_delim) {
parser->uri->port = 0;
parser->uri->host_name = authority_parse_csr;
parser->uri->host_name.ptr = authority_parse_csr.ptr + host_name_offset;
parser->uri->host_name.len = authority_parse_csr.len - host_name_length_correction;
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ugh, not a big fan of manual cursor manipulation?
assign authority_parse_csr to host and then advance and dec len by 1 to remove brackets?

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Thanks, I have updated the code to advance and decrement the length. Initially, I wrote the following code: 1127cad, but later refactored it to reduce code duplication. We can also refactor that version to use 'advance' and 'decrement length.' If you like that version better, I am conflicted between them.

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thanks. i think intent of what you are trying to do is much clearer in the latest version.

one further cleanup we could potentially do is to use aws_byte_cursor_next_split to separate host from port in authority. we can probably even get rid of memchr using that approach. but its a bigger refactoring, so we can do it in future

@waahm7 waahm7 merged commit 24e2396 into main May 8, 2024
51 of 52 checks passed
@waahm7 waahm7 deleted the ecs-ip-enforcement branch May 8, 2024 23:18
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3 participants