bool
is_post_request(TSHttpTxn txnp)
{
TSMLoc req_loc;
TSMBuffer req_bufp;
if (TSHttpTxnClientReqGet(txnp, &req_bufp, &req_loc) == TS_ERROR) {
TSError("Error while retrieving client request header\n");
return false;
}
int method_len = 0;
const char *method = TSHttpHdrMethodGet(req_bufp, req_loc, &method_len);
if (method_len != (int)strlen(TS_HTTP_METHOD_POST) || strncasecmp(method, TS_HTTP_METHOD_POST, method_len) != 0) {
TSHandleMLocRelease(req_bufp, TS_NULL_MLOC, req_loc);
return false;
}
TSHandleMLocRelease(req_bufp, TS_NULL_MLOC, req_loc);
return true;
}
/*
* This function is only called for redirected requests. It illustrates
* several different ways of updating INT64 stats. Some may consider
* the particular use of TSDecrementStat() shown below somewhat contrived.
*/
void
update_redirected_method_stats(TSMBuffer bufp, TSMLoc hdr_loc)
{
const char *txn_method;
int length;
int64_t tempint;
txn_method = TSHttpHdrMethodGet(bufp, hdr_loc, &length);
if (NULL != txn_method) {
if (0 == strncmp(txn_method, TS_HTTP_METHOD_CONNECT, length)) {
TSStatIntIncrement(redirect_count_connect, 1);
} else if (0 == strncmp(txn_method, TS_HTTP_METHOD_DELETE, length)) {
TSStatIntIncrement(redirect_count_delete, 1);
} else if (0 == strncmp(txn_method, TS_HTTP_METHOD_GET, length)) {
TSStatIntIncrement(redirect_count_get, 1);
} else if (0 == strncmp(txn_method, TS_HTTP_METHOD_HEAD, length)) {
TSStatIntIncrement(redirect_count_head, 1);
} else if (0 == strncmp(txn_method, TS_HTTP_METHOD_OPTIONS, length)) {
// This is a bad idea in a real plugin because it causes a race condition
// with other transactions, but is here for illustrative purposes.
tempint = TSStatIntGet(redirect_count_options);
++tempint;
TSStatIntSet(redirect_count_options, tempint);
} else if (0 == strncmp(txn_method, TS_HTTP_METHOD_POST, length)) {
// Illustrative only.
TSStatIntDecrement(redirect_count_post, 1);
TSStatIntIncrement(redirect_count_post, 2);
}
else if (0 == strncmp(txn_method, TS_HTTP_METHOD_PURGE, length)) {
TSStatIntIncrement(redirect_count_purge, 1);
} else if (0 == strncmp(txn_method, TS_HTTP_METHOD_PUT, length)) {
TSStatIntIncrement(redirect_count_put, 1);
} else if (0 == strncmp(txn_method, TS_HTTP_METHOD_TRACE, length)) {
TSStatIntIncrement(redirect_count_trace, 1);
} else {
TSStatIntIncrement(redirect_count_unknown, 1);
}
}
}
/*
* This function is only called for redirected requests. It illustrates
* several different ways of updating INT64 stats. Some may consider
* the particular use of TSDecrementStat() shown below somewhat contrived.
*/
void
update_redirected_method_stats(TSMBuffer bufp, TSMLoc hdr_loc)
{
const char *txn_method;
int length;
int64_t tempint;
txn_method = TSHttpHdrMethodGet(bufp, hdr_loc, &length);
if (NULL != txn_method) {
if (0 == strncmp(txn_method, TS_HTTP_METHOD_CONNECT, length))
INKStatIncrement(method_count_redirected_connect);
else if (0 == strncmp(txn_method, TS_HTTP_METHOD_DELETE, length))
INKStatIncrement(method_count_redirected_delete);
else if (0 == strncmp(txn_method, TS_HTTP_METHOD_GET, length))
INKStatIncrement(method_count_redirected_get);
else if (0 == strncmp(txn_method, TS_HTTP_METHOD_HEAD, length))
INKStatFloatAddTo(method_count_redirected_head, 1);
else if (0 == strncmp(txn_method, TS_HTTP_METHOD_ICP_QUERY, length))
INKStatFloatAddTo(method_count_redirected_icp_query, 1);
else if (0 == strncmp(txn_method, TS_HTTP_METHOD_OPTIONS, length)) {
tempint = INKStatIntGet(method_count_redirected_options);
tempint++;
INKStatIntSet(method_count_redirected_options, tempint);
} else if (0 == strncmp(txn_method, TS_HTTP_METHOD_POST, length)) {
INKStatDecrement(method_count_redirected_post);
INKStatIncrement(method_count_redirected_post);
INKStatIncrement(method_count_redirected_post);
}
else if (0 == strncmp(txn_method, TS_HTTP_METHOD_PURGE, length))
INKStatIncrement(method_count_redirected_purge);
else if (0 == strncmp(txn_method, TS_HTTP_METHOD_PUT, length))
INKStatIncrement(method_count_redirected_put);
else if (0 == strncmp(txn_method, TS_HTTP_METHOD_TRACE, length))
INKStatIncrement(method_count_redirected_trace);
else
INKStatIncrement(method_count_redirected_unknown);
}
}
static int
ts_lua_client_request_get_method(lua_State *L)
{
const char *method;
int method_len;
ts_lua_http_ctx *http_ctx;
http_ctx = ts_lua_get_http_ctx(L);
method = TSHttpHdrMethodGet(http_ctx->client_request_bufp, http_ctx->client_request_hdrp, &method_len);
if (method && method_len) {
lua_pushlstring(L, method, method_len);
} else {
lua_pushnil(L);
}
return 1;
}
static void
handle_purge(TSHttpTxn txnp, PurgeInstance *purge)
{
TSMBuffer reqp;
TSMLoc hdr_loc = NULL, url_loc = NULL;
bool should_purge = false;
if (TS_SUCCESS == TSHttpTxnClientReqGet(txnp, &reqp, &hdr_loc)) {
int method_len = 0;
const char *method = TSHttpHdrMethodGet(reqp, hdr_loc, &method_len);
if ((TS_HTTP_METHOD_PURGE == method) || ((TS_HTTP_METHOD_GET == method) && purge->allow_get)) {
/* First see if we require the "secret" to be passed in a header, and then use that */
if (purge->header) {
TSMLoc field_loc = TSMimeHdrFieldFind(reqp, hdr_loc, purge->header, purge->header_len);
if (field_loc) {
const char *header;
int header_len;
header = TSMimeHdrFieldValueStringGet(reqp, hdr_loc, field_loc, -1, &header_len);
TSDebug(PLUGIN_NAME, "Checking for %.*s == %s ?", header_len, header, purge->secret);
if (header && (header_len == purge->secret_len) && !memcmp(header, purge->secret, header_len)) {
should_purge = true;
}
TSHandleMLocRelease(reqp, hdr_loc, field_loc);
}
} else {
/* We are matching on the path component instead of a header */
if (TS_SUCCESS == TSHttpHdrUrlGet(reqp, hdr_loc, &url_loc)) {
int path_len = 0;
const char *path = TSUrlPathGet(reqp, url_loc, &path_len);
TSDebug(PLUGIN_NAME, "Checking PATH = %.*s", path_len, path);
if (path && (path_len >= purge->secret_len)) {
int s_path = path_len - 1;
while ((s_path >= 0) && ('/' != path[s_path])) { /* No memrchr in OSX */
--s_path;
}
if (!memcmp(s_path > 0 ? path + s_path + 1 : path, purge->secret, purge->secret_len)) {
should_purge = true;
}
}
TSHandleMLocRelease(reqp, hdr_loc, url_loc);
}
}
}
TSHandleMLocRelease(reqp, TS_NULL_MLOC, hdr_loc);
}
/* Setup the continuation to handle this request if appropriate, if not, set the GenID if needed */
if (should_purge) {
TSCont cont = TSContCreate(purge_cont, TSMutexCreate());
TSContDataSet(cont, purge);
TSHttpTxnHookAdd(txnp, TS_HTTP_CACHE_LOOKUP_COMPLETE_HOOK, cont);
TSHttpTxnHookAdd(txnp, TS_HTTP_SEND_RESPONSE_HDR_HOOK, cont);
} else if (purge->gen_id > 0) {
TSHttpTxnConfigIntSet(txnp, TS_CONFIG_HTTP_CACHE_GENERATION, purge->gen_id);
}
}
