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#define HTTPD_TEST_REQUIRE_APACHE 2
#if CONFIG_FOR_HTTPD_TEST
<Location /input_body_filter>
SetHandler input-body-filter
InputBodyFilter On
</Location>
#endif
#include "httpd.h"
#include "http_config.h"
#include "http_protocol.h"
#include "http_request.h"
#include "http_log.h"
#include "ap_config.h"
#include "util_filter.h"
#include "apr_buckets.h"
#include "apr_strings.h"
module AP_MODULE_DECLARE_DATA input_body_filter_module;
#define INPUT_BODY_FILTER_NAME "INPUT_BODY_FILTER"
typedef struct {
int enabled;
} input_body_filter_dcfg_t;
static void *input_body_filter_dcfg_create(apr_pool_t *p, char *dummy)
{
input_body_filter_dcfg_t *dcfg =
(input_body_filter_dcfg_t *)apr_pcalloc(p, sizeof(*dcfg));
return dcfg;
}
static int input_body_filter_fixup_handler(request_rec *r)
{
if ((r->method_number == M_POST) && r->handler &&
!strcmp(r->handler, "input-body-filter"))
{
r->handler = "echo_post";
}
return OK;
}
static int input_body_filter_response_handler(request_rec *r)
{
if (strcmp(r->handler, "echo_post")) {
return DECLINED;
}
if (r->method_number != M_POST) {
ap_rputs("1..1\nok 1\n", r);
return OK;
}
else {
return DECLINED;
}
}
static void reverse_string(char *string, int len)
{
register char *up, *down;
register unsigned char tmp;
up = string;
down = string + len - 1;
while (down > up) {
tmp = *up;
*up++ = *down;
*down-- = tmp;
}
}
typedef struct input_body_ctx_t {
apr_bucket_brigade *b;
} input_body_ctx_t;
static int input_body_filter_handler(ap_filter_t *f, apr_bucket_brigade *bb,
ap_input_mode_t mode,
apr_read_type_e block,
apr_off_t readbytes)
{
request_rec *r = f->r;
conn_rec *c = r->connection;
apr_status_t rv;
input_body_ctx_t *ctx = f->ctx;
if (!ctx) {
f->ctx = ctx = apr_pcalloc(r->pool, sizeof(*ctx));
ctx->b = apr_brigade_create(r->pool, c->bucket_alloc);
}
if (APR_BRIGADE_EMPTY(ctx->b))
{
if ((rv = ap_get_brigade(f->next, ctx->b, mode, block,
readbytes)) != APR_SUCCESS) {
return rv;
}
}
while (!APR_BRIGADE_EMPTY(ctx->b)) {
const char *data;
apr_size_t len;
apr_bucket *bucket;
bucket = APR_BRIGADE_FIRST(ctx->b);
if (APR_BUCKET_IS_EOS(bucket)) {
APR_BUCKET_REMOVE(bucket);
APR_BRIGADE_INSERT_TAIL(bb, bucket);
break;
}
rv = apr_bucket_read(bucket, &data, &len, block);
if (rv != APR_SUCCESS) {
return rv;
}
APR_BUCKET_REMOVE(bucket);
if (len) {
char *reversed = apr_pstrndup(r->pool, data, len);
reverse_string(reversed, len);
bucket = apr_bucket_pool_create(reversed, len, r->pool,
c->bucket_alloc);
}
APR_BRIGADE_INSERT_TAIL(bb, bucket);
}
return OK;
}
static void input_body_filter_insert_filter(request_rec *r)
{
input_body_filter_dcfg_t *dcfg =
ap_get_module_config(r->per_dir_config,
&input_body_filter_module);
if (dcfg->enabled) {
ap_add_input_filter(INPUT_BODY_FILTER_NAME, NULL, r, r->connection);
}
}
static void input_body_filter_register_hooks(apr_pool_t *p)
{
ap_hook_fixups(input_body_filter_fixup_handler,
NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_handler(input_body_filter_response_handler,
NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_insert_filter(input_body_filter_insert_filter,
NULL, NULL, APR_HOOK_MIDDLE);
ap_register_input_filter(INPUT_BODY_FILTER_NAME,
input_body_filter_handler,
NULL,
AP_FTYPE_RESOURCE);
}
static const command_rec input_body_filter_cmds[] = {
AP_INIT_FLAG("InputBodyFilter", ap_set_flag_slot,
(void *)APR_OFFSETOF(input_body_filter_dcfg_t, enabled),
OR_ALL, "Enable input body filter"),
{ NULL }
};
module AP_MODULE_DECLARE_DATA input_body_filter_module = {
STANDARD20_MODULE_STUFF,
input_body_filter_dcfg_create, /* create per-dir config structures */
NULL, /* merge per-dir config structures */
NULL, /* create per-server config structures */
NULL, /* merge per-server config structures */
input_body_filter_cmds, /* table of config file commands */
input_body_filter_register_hooks /* register hooks */
};
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