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BUG/MINOR: cache: Check the return value of http_replace_res_status

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Send the full body if the status `304` cannot be applied. This should be the
most graceful failure.

Specific for 2.3, no backport needed.
This commit is contained in:
Tim Duesterhus 2020-10-22 21:15:06 +02:00 committed by William Lallemand
parent 787c63c816
commit e0142340b2
1 changed files with 6 additions and 2 deletions
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8
src/cache.c
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@ -935,8 +935,12 @@ static void http_cache_io_handler(struct appctx *appctx)
/* In case of a conditional request, we might want to send a
* "304 Not Modified" response instead of the stored data. */
if (appctx->ctx.cache.send_notmodified)
http_replace_res_status(res_htx, ist("304"), ist("Not Modified"));
if (appctx->ctx.cache.send_notmodified) {
if (!http_replace_res_status(res_htx, ist("304"), ist("Not Modified"))) {
/* If replacing the status code fails we need to send the full response. */
appctx->ctx.cache.send_notmodified = 0;
}
}
/* Skip response body for HEAD requests or in case of "304 Not
* Modified" response. */