Make 204 cacheable again (#9333)

maskit · web-flow · commit 3dcf2a8a0fae · 2023-01-25T16:38:44.000-07:00
diff --git a/iocore/cache/Cache.cc b/iocore/cache/Cache.cc
@@ -453,7 +453,7 @@ CacheVC::set_http_info(CacheHTTPInfo *ainfo)
   }
 
   MIMEField *field = ainfo->m_alt->m_response_hdr.field_find(MIME_FIELD_CONTENT_LENGTH, MIME_LEN_CONTENT_LENGTH);
-  if (field && !field->value_get_int64()) {
+  if ((field && !field->value_get_int64()) || ainfo->m_alt->m_response_hdr.status_get() == HTTP_STATUS_NO_CONTENT) {
     f.allow_empty_doc = 1;
     // Set the object size here to zero in case this is a cache replace where the new object
     // length is zero but the old object was not.

Original file line number	Diff line number	Diff line change
`@@ -453,7 +453,7 @@ CacheVC::set_http_info(CacheHTTPInfo *ainfo)`
`453`	`453`	`}`
`454`	`454`
`455`	`455`	`MIMEField *field = ainfo->m_alt->m_response_hdr.field_find(MIME_FIELD_CONTENT_LENGTH, MIME_LEN_CONTENT_LENGTH);`
`456`		`- if (field && !field->value_get_int64()) {`
	`456`	`+ if ((field && !field->value_get_int64()) \|\| ainfo->m_alt->m_response_hdr.status_get() == HTTP_STATUS_NO_CONTENT) {`
`457`	`457`	`f.allow_empty_doc = 1;`
`458`	`458`	`// Set the object size here to zero in case this is a cache replace where the new object`
`459`	`459`	`// length is zero but the old object was not.`