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Make no-cache a tristate. In the case of a forced reload, we want to revalidate once only.

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svn path=/trunk/netsurf/; revision=11791
This commit is contained in:
John Mark Bell 2011-02-24 21:22:24 +00:00
parent 00bf0fbd24
commit d25a88145b
1 changed files with 21 additions and 6 deletions
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27
content/llcache.c
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@ -86,6 +86,12 @@ typedef struct {
bool tried_with_auth; /**< Whether we've tried with auth */
} llcache_fetch_ctx;
typedef enum {
LLCACHE_VALIDATE_FRESH, /**< Only revalidate if not fresh */
LLCACHE_VALIDATE_ALWAYS, /**< Always revalidate */
LLCACHE_VALIDATE_ONCE /**< Revalidate once only */
} llcache_validate;
/** Cache control data */
typedef struct {
time_t req_time; /**< Time of request */
@ -95,7 +101,7 @@ typedef struct {
#define INVALID_AGE -1
int age; /**< Age: response header */
int max_age; /**< Max-Age Cache-control parameter */
bool no_cache; /**< No-Cache Cache-control parameter */
llcache_validate no_cache; /**< No-Cache Cache-control parameter */
char *etag; /**< Etag: response header */
time_t last_modified; /**< Last-Modified: response header */
} llcache_cache_control;
@ -506,8 +512,10 @@ nserror llcache_handle_force_stream(llcache_handle *handle)
/* See llcache.h for documentation */
nserror llcache_handle_invalidate_cache_data(llcache_handle *handle)
{
if (handle->object != NULL && handle->object->fetch.fetch == NULL) {
handle->object->cache.no_cache = true;
if (handle->object != NULL && handle->object->fetch.fetch == NULL &&
handle->object->cache.no_cache ==
LLCACHE_VALIDATE_FRESH) {
handle->object->cache.no_cache = LLCACHE_VALIDATE_ONCE;
}
return NSERROR_OK;
@ -902,7 +910,8 @@ bool llcache_object_is_fresh(const llcache_object *object)
* its current age is within the freshness lifetime
* or if we're still fetching the object
*/
return (cd->no_cache == false && (freshness_lifetime > current_age ||
return (cd->no_cache == LLCACHE_VALIDATE_FRESH &&
(freshness_lifetime > current_age ||
object->fetch.state != LLCACHE_FETCH_COMPLETE));
}
@ -968,7 +977,7 @@ nserror llcache_object_clone_cache_data(llcache_object *source,
if (source->cache.max_age != INVALID_AGE)
destination->cache.max_age = source->cache.max_age;
if (source->cache.no_cache)
if (source->cache.no_cache != LLCACHE_VALIDATE_FRESH)
destination->cache.no_cache = source->cache.no_cache;
if (source->cache.last_modified != 0)
@ -2104,6 +2113,12 @@ nserror llcache_fetch_notmodified(llcache_object *object,
false);
/* Bring candidate's cache data up to date */
llcache_object_cache_update(object->candidate);
/* Revert no-cache to normal, if required */
if (object->candidate->cache.no_cache ==
LLCACHE_VALIDATE_ONCE) {
object->candidate->cache.no_cache =
LLCACHE_VALIDATE_FRESH;
}
/* Candidate is now our object */
*replacement = object->candidate;
@ -2262,7 +2277,7 @@ nserror llcache_fetch_parse_header(llcache_object *object, const char *data,
strncasecmp(start, "no-store", 8) == 0))
/* When we get a disk cache we should
* distinguish between these two */
object->cache.no_cache = true;
object->cache.no_cache = LLCACHE_VALIDATE_ALWAYS;
else if (7 < comma - start &&
strncasecmp(start, "max-age", 7) == 0) {
/* Find '=' */