tzssangglass commented on issue #7674:
URL: https://github.com/apache/apisix/issues/7674#issuecomment-1216123324
In any case, I think the immediate cause is that `string.char()` is
converting number that over the range 0..255.
here is the test cases:
```
use t::APISIX 'no_plan';
add_block_preprocessor(sub {
my ($block) = @_;
if (!$block->request) {
$block->set_value("request", "GET /t");
}
if (!defined $block->response_body) {
$block->set_value("response_body", "passed\n");
}
if (!$block->no_error_log && !$block->error_log) {
$block->set_value("no_error_log", "[error]");
}
$block;
});
repeat_each(1);
no_long_string();
no_root_location();
log_level("info");
run_tests;
__DATA__
=== TEST 19: set additional_attributes
--- config
location /t {
content_by_lua_block {
local id_generator = require("opentelemetry.trace.id_generator")
local trace_id =id_generator.new_ids()
-- mock hex2bytes
local function hex2bytes(str)
return (str:gsub('..', function (cc)
local n = tonumber(cc, 16)
if n then
-- hack n to be over the range 0..255
return string.char(256)
end
end))
end
hex2bytes(trace_id)
ngx.say("done")
}
}
--- response_body
done
```
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