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<p class="MsoNormal"><span lang="EN-US">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Something I bumped into today – <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">When using the zero flag of ngx_http_compile_complex_value_t (for example, using
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ngx_http_set_complex_value_zero_slot) the length of the resulting string is inconsistent -<o:p></o:p></span></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US">If the complex value is a simple string, the length does not include the null terminator.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US">If the complex value includes variables, the length includes the null terminator.<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This happens because ngx_http_script_done adds code to copy the null explicitly, while simple strings<br>
are copied as-is from val->value at the beginning of ngx_http_complex_value.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I assume that usually the length is not used when asking for a null terminated string.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">However, in my case, I’m parsing the resulting value, and I’m supporting several different formats.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In some flows, I’m parsing the value using nginx functions (e.g. ngx_atoi) while in other flows,
<br>
I’m using a glibc function (strptime).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">IMHO, the correct behavior is to change the impl so that it will never count the null terminator in the length.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Maybe add a ‘zero’ flag on ngx_http_complex_value_t, and do something like –<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">value->len = len – val->zero;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Eran<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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