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urlapi: preserve empty markers in relative URLs

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Verified in test 1560

Closes #22298
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Alb3e3 2026-07-10 23:22:11 +02:00 • committed by Daniel Stenberg
parent 4dc236a109
commit c221469032
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2 changed files with 21 additions and 11 deletions
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11
lib/urlapi.c
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@ -1279,16 +1279,16 @@ static CURLUcode redirect_url(const char *base, const char *relurl,
case '#':
/* fragment-only change */
if(u->fragment)
if(u->fragment_present)
cutoff = strchr(protsep, '#');
break;
default:
/* path or query-only change */
if(u->query && u->query[0])
if(u->query_present)
/* remove existing query */
cutoff = strchr(protsep, '?');
else if(u->fragment && u->fragment[0])
else if(u->fragment_present)
/* Remove existing fragment */
cutoff = strchr(protsep, '#');
@ -1772,7 +1772,10 @@ static CURLUcode set_url(CURLU *u, const char *url, size_t part_size,
/* if the old URL is incomplete (we cannot get an absolute URL in
'oldurl'), replace the existing with the new.
Always include "scheme://" to make the URL "complete" */
uc = curl_url_get(u, CURLUPART_URL, &oldurl, flags & ~CURLU_NO_GUESS_SCHEME);
/* Preserve empty query/fragment separators: they affect where relative
references splice into the base URL. */
uc = curl_url_get(u, CURLUPART_URL, &oldurl,
(flags & ~CURLU_NO_GUESS_SCHEME) | CURLU_GET_EMPTY);
if(uc == CURLUE_OUT_OF_MEMORY)
return uc;
else if(uc)