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CLEANUP: opentracing: simplify the condition on the empty header

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The second patch from the last series of patches has been redesigned
here, the ist() function is used to set an empty string instead of
working directly with the string pointer.

I thank Tim Dsterhus for his advice.
This commit is contained in:
Miroslav Zagorac 2021-09-12 08:15:37 +02:00 committed by Willy Tarreau
parent ed17ca7006
commit e956c9cdac
1 changed files with 12 additions and 7 deletions
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19
addons/ot/src/http.c
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@ -133,20 +133,25 @@ struct otc_text_map *flt_ot_http_headers_get(struct channel *chn, const char *pr
v = htx_get_blk_value(htx, blk);
/*
* In case the data of the HTTP header is not
* specified, v.ptr will have some non-null
* value and v.len will be equal to 0. The
* otc_text_map_add() function will not
* interpret this well. In this case v.ptr
* is set to an empty string.
*/
if (v.len == 0)
v = ist("");
/*
* Here, an HTTP header (which is actually part
* of the span context is added to the text_map.
*
* Before adding, the prefix is removed from the
* HTTP header name.
*
* In case the data of the HTTP header is not
* specified, v.len will be equal to 0, and
* the function otc_text_map_add() will not
* interpret this well. In this case, instead
* of v.ptr, "" is used.
*/
if (otc_text_map_add(retptr, n.ptr + prefix_len, n.len - prefix_len, (v.len > 0) ? v.ptr : "", v.len, OTC_TEXT_MAP_DUP_KEY | OTC_TEXT_MAP_DUP_VALUE) == -1) {
if (otc_text_map_add(retptr, n.ptr + prefix_len, n.len - prefix_len, v.ptr, v.len, OTC_TEXT_MAP_DUP_KEY | OTC_TEXT_MAP_DUP_VALUE) == -1) {
FLT_OT_ERR("failed to add HTTP header data");
otc_text_map_destroy(&retptr, OTC_TEXT_MAP_FREE_KEY | OTC_TEXT_MAP_FREE_VALUE);