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mod_proxy, mod_proxy_http: Connection headers must be stripped on the way

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in and out, support an optional function to handle this.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1482075 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Graham Leggett
2013-05-13 20:11:36 +00:00
parent c7fb34dcb0
commit d2e6782ea7
4 changed files with 105 additions and 59 deletions
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86
modules/proxy/proxy_util.c
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@@ -2969,45 +2969,71 @@ PROXY_DECLARE(proxy_balancer_shared *) ap_proxy_find_balancershm(ap_slotmem_prov
return NULL;
}
void proxy_util_register_hooks(apr_pool_t *p)
{
APR_REGISTER_OPTIONAL_FN(ap_proxy_retry_worker);
}
/* Clear all connection-based headers from the incoming headers table */
typedef struct header_dptr {
typedef struct header_connection {
apr_pool_t *pool;
apr_table_t *table;
apr_time_t time;
} header_dptr;
apr_array_header_t *array;
const char *first;
unsigned int closed:1;
} header_connection;
static int clear_conn_headers(void *data, const char *key, const char *val)
static int find_conn_headers(void *data, const char *key, const char *val)
{
apr_table_t *headers = ((header_dptr*)data)->table;
apr_pool_t *pool = ((header_dptr*)data)->pool;
header_connection *x = data;
const char *name;
char *next = apr_pstrdup(pool, val);
while (*next) {
name = next;
while (*next && !apr_isspace(*next) && (*next != ',')) {
++next;
name = ap_get_token(x->pool, &val, 0);
while (name && *name) {
if (!strcasecmp(name, "close")) {
x->closed = 1;
}
while (*next && (apr_isspace(*next) || (*next == ','))) {
*next++ = '\0';
if (!x->first) {
x->first = name;
}
apr_table_unset(headers, name);
else {
if (!x->array) {
x->array = apr_array_make(x->pool, 4, sizeof(char *));
}
const char **elt = apr_array_push(x->array);
*elt = name;
}
while (*val == ',') {
++val;
}
name = ap_get_token(x->pool, &val, 0);
}
return 1;
}
static void proxy_clear_connection(request_rec *r, apr_table_t *headers)
/**
* Remove all headers referred to by the Connection header.
*/
PROXY_DECLARE(int) ap_proxy_clear_connection(request_rec *r,
apr_table_t *headers)
{
header_dptr x;
const char **name;
header_connection x;
x.pool = r->pool;
x.table = headers;
x.array = NULL;
x.first = NULL;
x.closed = 0;
apr_table_unset(headers, "Proxy-Connection");
apr_table_do(clear_conn_headers, &x, r->headers_in, "Connection", NULL);
apr_table_unset(headers, "Connection");
apr_table_do(find_conn_headers, &x, headers, "Connection", NULL);
if (x.first) {
/* fast path - no memory allocated for one header */
apr_table_unset(headers, "Connection");
apr_table_unset(headers, x.first);
}
if (x.array) {
/* two or more headers */
while ((name = apr_array_pop(x.array))) {
apr_table_unset(headers, *name);
}
}
return x.closed;
}
PROXY_DECLARE(int) ap_proxy_create_hdrbrgd(apr_pool_t *p,
@@ -3194,7 +3220,7 @@ PROXY_DECLARE(int) ap_proxy_create_hdrbrgd(apr_pool_t *p,
* apr is compiled with APR_POOL_DEBUG.
*/
headers_in_copy = apr_table_copy(r->pool, r->headers_in);
proxy_clear_connection(r, headers_in_copy);
ap_proxy_clear_connection(r, headers_in_copy);
/* send request headers */
headers_in_array = apr_table_elts(headers_in_copy);
headers_in = (const apr_table_entry_t *) headers_in_array->elts;
@@ -3299,3 +3325,9 @@ PROXY_DECLARE(int) ap_proxy_pass_brigade(apr_bucket_alloc_t *bucket_alloc,
apr_brigade_cleanup(bb);
return OK;
}
void proxy_util_register_hooks(apr_pool_t *p)
{
APR_REGISTER_OPTIONAL_FN(ap_proxy_retry_worker);
APR_REGISTER_OPTIONAL_FN(ap_proxy_clear_connection);
}