static int lconn_get_reply(lua_State * L)
{
redisContext * pContext = check_connection(L, 1);
int nret = 0;
redisReply * pReply = NULL;
int ok = redisGetReply(pContext, (void **)&pReply);
if (ok != REDIS_OK || pReply == NULL)
{
/* TODO: Shouldn't we clear the context error state somehow after this? */
return push_error(L, pContext);
}
nret = push_reply(L, pReply);
/*
* TODO: Not entirely safe: if above code throws error, reply object is leaked.
*/
freeReplyObject(pReply);
pReply = NULL;
return nret;
}
static void on_redis_response(redisAsyncContext *context, void *reply, void *privdata)
{
redisReply *redisReply = reply;
luv_ref_t *ref = privdata;
int replyArgsCount = 0;
lua_State *L = ref->L;
lua_rawgeti(L, LUA_REGISTRYINDEX, ref->r);
luaL_unref(L, LUA_REGISTRYINDEX, ref->r);
ref_free(ref);
if (redisReply == NULL)
{
luv_push_async_hiredis_error(L, context, "on_redis_response");
lua_pushnil(L);
luv_acall(L, 2, 0, "on_redis_response");
}
else
{
if (redisReply->type != REDIS_REPLY_ERROR)
{
lua_pushnil(L);
++replyArgsCount;
}
replyArgsCount += push_reply(L, redisReply);
luv_acall(L, replyArgsCount, 0, "on_redis_response");
}
}
static int lconn_command(lua_State * L)
{
redisContext * pContext = check_connection(L, 1);
const char * argv[LUAHIREDIS_MAXARGS];
size_t argvlen[LUAHIREDIS_MAXARGS];
int nargs = load_args(L, pContext, 2, argv, argvlen);
int nret = 0;
redisReply * pReply = (redisReply *)redisCommandArgv(
pContext, nargs, argv, argvlen
);
if (pReply == NULL)
{
/* TODO: Shouldn't we clear the context error state somehow after this? */
return push_error(L, pContext);
}
nret = push_reply(L, pReply);
/*
* TODO: Not entirely safe: if above code throws error, reply object is leaked.
*/
freeReplyObject(pReply);
pReply = NULL;
return nret;
}
static int lconn_get_reply(lua_State * L)
{
redisContext * pContext = check_connection(L, 1);
/* int base = lua_gettop(L); */
int nret = 0;
redisReply * pReply = NULL;
int ok = redisGetReply(pContext, (void **)&pReply);
if (ok != REDIS_OK || pReply == NULL)
{
/* TODO: Shouldn't we clear the context error state somehow after this? */
return push_error(L, pContext);
}
/*
if (lua_gettop(L) != base)
{
freeReplyObject(pReply);
return luaL_error(
L, "lhrstackerror1 actual %d expected %d", lua_gettop(L), base
);
}
*/
nret = push_reply(L, pReply);
/*
if (lua_gettop(L) != base + nret)
{
freeReplyObject(pReply);
return luaL_error(
L, "lhrstackerror2 actual %d expected %d base %d", lua_gettop(L),
base + nret, base
);
}
*/
/*
* TODO: Not entirely safe: if above code throws error, reply object is leaked.
*/
freeReplyObject(pReply);
pReply = NULL;
return nret;
}
static int push_reply(lua_State *L, redisReply *redisReply)
{
switch(redisReply->type)
{
case REDIS_REPLY_ERROR:
luv_push_async_error_raw(L, NULL, redisReply->str, "push_reply", NULL);
break;
case REDIS_REPLY_STATUS:
lua_pushlstring(L, redisReply->str, redisReply->len);
break;
case REDIS_REPLY_INTEGER:
lua_pushinteger(L, redisReply->integer);
break;
case REDIS_REPLY_NIL:
lua_pushnil(L);
break;
case REDIS_REPLY_STRING:
lua_pushlstring(L, redisReply->str, redisReply->len);
break;
case REDIS_REPLY_ARRAY:
{
unsigned int i;
lua_createtable(L, redisReply->elements, 0);
for (i = 0; i < redisReply->elements; ++i)
{
push_reply(L, redisReply->element[i]);
lua_rawseti(L, -2, i + 1); /* Store sub-reply */
}
break;
}
default:
return luaL_error(L, "Unknown reply type: %d", redisReply->type);
}
return 1;
}
bool parse_redis_protocol(struct request *req)
{
int ret;
void *reply;
redisReader *reader;
if(strncmp(req->buf, "$-1", 3) == 0)
{
lua_pushboolean(req->vm, false);
return true;
}
else if(strncmp(req->buf, "+OK", 3) == 0)
{
lua_pushboolean(req->vm, true);
return true;
}
reader = redisReaderCreate();
DEBUG_PRINT("req->buf=%s\r\n", req->buf);
redisReaderFeed(reader, req->buf, sdslen(req->buf));
ret = redisReaderGetReply(reader,&reply);
if (ret == REDIS_ERR)
{
freeReplyObject(reply);
redisReaderFree(reader);
return false;
}
push_reply(req->vm, (redisReply*)reply);
//printf("%s\r\n", ((redisReply*)reply)->str);
freeReplyObject(reply);
redisReaderFree(reader);
return true;
}
static int push_reply(lua_State * L, redisReply * pReply)
{
switch (pReply->type)
{
case REDIS_REPLY_STATUS:
luaL_checkstack(L, 2, "not enough stack to push reply");
lua_pushvalue(L, lua_upvalueindex(1)); /* M (module table) */
lua_getfield(L, -1, "status"); /* status = M.status */
lua_remove(L, -2); /* Remove module table from stack */
lua_pushlstring(L, pReply->str, pReply->len); /* name */
lua_gettable(L, -2); /* status[name] */
lua_remove(L, -2); /* Remove status table from stack */
break;
case REDIS_REPLY_ERROR:
/* Not caching errors, they are (hopefully) not that common */
push_new_const(L, pReply->str, pReply->len, REDIS_REPLY_ERROR);
break;
case REDIS_REPLY_INTEGER:
luaL_checkstack(L, 1, "not enough stack to push reply");
lua_pushinteger(L, pReply->integer);
break;
case REDIS_REPLY_NIL:
luaL_checkstack(L, 2, "not enough stack to push reply");
lua_pushvalue(L, lua_upvalueindex(1)); /* module table */
lua_getfield(L, -1, LUAHIREDIS_KEY_NIL);
lua_remove(L, -2); /* module table */
break;
case REDIS_REPLY_STRING:
luaL_checkstack(L, 1, "not enough stack to push reply");
lua_pushlstring(L, pReply->str, pReply->len);
break;
case REDIS_REPLY_ARRAY:
{
unsigned int i = 0;
luaL_checkstack(L, 2, "not enough stack to push reply");
lua_createtable(L, pReply->elements, 0);
for (i = 0; i < pReply->elements; ++i)
{
/*
* Not controlling recursion depth:
* if we parsed the reply somehow,
* we hope to be able to push it.
*/
push_reply(L, pReply->element[i]);
lua_rawseti(L, -2, i + 1); /* Store sub-reply */
}
break;
}
default: /* should not happen */
return luaL_error(L, "command: unknown reply type: %d", pReply->type);
}
/*
* Always returning a single value.
* If changed, change REDIS_REPLY_ARRAY above.
*/
return 1;
}
static int push_reply(lua_State * L, redisReply * pReply)
{
/* int base = lua_gettop(L); */
switch(pReply->type)
{
case REDIS_REPLY_STATUS:
lua_pushvalue(L, lua_upvalueindex(1)); /* M (module table) */
lua_pushlstring(L, pReply->str, pReply->len); /* status */
lua_gettable(L, -2); /* M[status] */
if (lua_isnil(L, -1)) /* Not bothering with metatables */
{
/*
* TODO: Following code is likely to be broken due to early binding
* (imagine that RETURN is a command that returns given string
* as a status):
*
* assert(conn:command("RETURN", "FOO") == hiredis.FOO)
*
* Here hiredis.FOO would be nil before conn:command() is called.
*
* Note that this is not relevant to the current Redis implementation
* (that is 2.2 and before), since it seems that it wouldn't
* return any status code except OK, QUEUED or PONG,
* all of which are alread covered.
*/
lua_pushlstring(L, pReply->str, pReply->len); /* status */
push_new_const(
L, pReply->str, pReply->len, REDIS_REPLY_STATUS /* const */
);
lua_settable(L, -3); /* M[status] = const */
lua_pushlstring(L, pReply->str, pReply->len); /* status */
lua_gettable(L, -2); /* return M[status] */
}
lua_remove(L, -2); /* Remove module table */
break;
case REDIS_REPLY_ERROR:
/* Not caching errors, they are (hopefully) not that common */
push_new_const(L, pReply->str, pReply->len, REDIS_REPLY_ERROR);
break;
case REDIS_REPLY_INTEGER:
lua_pushinteger(L, pReply->integer);
break;
case REDIS_REPLY_NIL:
lua_pushvalue(L, lua_upvalueindex(1)); /* module table */
lua_getfield(L, -1, LUAHIREDIS_KEY_NIL);
lua_remove(L, -2); /* module table */
break;
case REDIS_REPLY_STRING:
lua_pushlstring(L, pReply->str, pReply->len);
break;
case REDIS_REPLY_ARRAY:
{
unsigned int i = 0;
lua_createtable(L, pReply->elements, 0);
for (i = 0; i < pReply->elements; ++i)
{
/*
* Not controlling recursion depth:
* if we parsed the reply somehow,
* we hope to be able to push it.
*/
push_reply(L, pReply->element[i]);
lua_rawseti(L, -2, i + 1); /* Store sub-reply */
}
break;
}
default: /* should not happen */
return luaL_error(L, "command: unknown reply type: %d", pReply->type);
}
/*
if (lua_gettop(L) != base + 1)
{
return luaL_error(L, "pushreplystackerror: actual %d expected %d base %d type %d", lua_gettop(L), base + 1, base, pReply->type);
}
*/
/*
* Always returning a single value.
* If changed, change REDIS_REPLY_ARRAY above.
*/
return 1;
}
