redisClient *c = zmalloc(sizeof(redisClient));
c->bufpos = 0;
- anetNonBlock(NULL,fd);
- anetTcpNoDelay(NULL,fd);
- if (aeCreateFileEvent(server.el,fd,AE_READABLE,
- readQueryFromClient, c) == AE_ERR)
- {
- close(fd);
- zfree(c);
- return NULL;
+ /* passing -1 as fd it is possible to create a non connected client.
+ * This is useful since all the Redis commands needs to be executed
+ * in the context of a client. When commands are executed in other
+ * contexts (for instance a Lua script) we need a non connected client. */
+ if (fd != -1) {
+ anetNonBlock(NULL,fd);
+ anetTcpNoDelay(NULL,fd);
+ if (aeCreateFileEvent(server.el,fd,AE_READABLE,
+ readQueryFromClient, c) == AE_ERR)
+ {
+ close(fd);
+ zfree(c);
+ return NULL;
+ }
}
selectDb(c,0);
c->reqtype = 0;
c->argc = 0;
c->argv = NULL;
+ c->cmd = NULL;
c->multibulklen = 0;
c->bulklen = -1;
c->sentlen = 0;
c->pubsub_patterns = listCreate();
listSetFreeMethod(c->pubsub_patterns,decrRefCount);
listSetMatchMethod(c->pubsub_patterns,listMatchObjects);
- listAddNodeTail(server.clients,c);
+ if (fd != -1) listAddNodeTail(server.clients,c);
initClientMultiState(c);
return c;
}
/* Set the event loop to listen for write events on the client's socket.
* Typically gets called every time a reply is built. */
int _installWriteEvent(redisClient *c) {
+ if (c->flags & REDIS_LUA_CLIENT) return REDIS_OK;
if (c->fd <= 0) return REDIS_ERR;
if (c->bufpos == 0 && listLength(c->reply) == 0 &&
(c->replstate == REDIS_REPL_NONE ||
}
void addReplyErrorFormat(redisClient *c, const char *fmt, ...) {
+ size_t l, j;
va_list ap;
va_start(ap,fmt);
sds s = sdscatvprintf(sdsempty(),fmt,ap);
va_end(ap);
+ /* Make sure there are no newlines in the string, otherwise invalid protocol
+ * is emitted. */
+ l = sdslen(s);
+ for (j = 0; j < l; j++) {
+ if (s[j] == '\r' || s[j] == '\n') s[j] = ' ';
+ }
_addReplyError(c,s,sdslen(s));
sdsfree(s);
}
for (j = 0; j < c->argc; j++)
decrRefCount(c->argv[j]);
c->argc = 0;
+ c->cmd = NULL;
}
void freeClient(redisClient *c) {
redisAssert(ln != NULL);
listDelNode(server.unblocked_clients,ln);
}
- /* Remove from the list of clients waiting for swapped keys, or ready
- * to be restarted, but not yet woken up again. */
- if (c->flags & REDIS_IO_WAIT) {
- redisAssert(server.ds_enabled);
- if (listLength(c->io_keys) == 0) {
- ln = listSearchKey(server.io_ready_clients,c);
-
- /* When this client is waiting to be woken up (REDIS_IO_WAIT),
- * it should be present in the list io_ready_clients */
- redisAssert(ln != NULL);
- listDelNode(server.io_ready_clients,ln);
- } else {
- while (listLength(c->io_keys)) {
- ln = listFirst(c->io_keys);
- dontWaitForSwappedKey(c,ln->value);
- }
- }
- server.cache_blocked_clients--;
- }
listRelease(c->io_keys);
/* Master/slave cleanup.
* Case 1: we lost the connection with a slave. */
}
}
if (totwritten > 0) c->lastinteraction = time(NULL);
- if (listLength(c->reply) == 0) {
+ if (c->bufpos == 0 && listLength(c->reply) == 0) {
c->sentlen = 0;
aeDeleteFileEvent(server.el,c->fd,AE_WRITABLE);
if (c->multibulklen == 0) {
/* The client should have been reset */
- redisAssert(c->argc == 0);
+ redisAssertWithInfo(c,NULL,c->argc == 0);
/* Multi bulk length cannot be read without a \r\n */
newline = strchr(c->querybuf,'\r');
/* We know for sure there is a whole line since newline != NULL,
* so go ahead and find out the multi bulk length. */
- redisAssert(c->querybuf[0] == '*');
+ redisAssertWithInfo(c,NULL,c->querybuf[0] == '*');
ok = string2ll(c->querybuf+1,newline-(c->querybuf+1),&ll);
if (!ok || ll > 1024*1024) {
addReplyError(c,"Protocol error: invalid multibulk length");
c->argv = zmalloc(sizeof(robj*)*c->multibulklen);
}
- redisAssert(c->multibulklen > 0);
+ redisAssertWithInfo(c,NULL,c->multibulklen > 0);
while(c->multibulklen) {
/* Read bulk length if unknown */
if (c->bulklen == -1) {
/* Keep processing while there is something in the input buffer */
while(sdslen(c->querybuf)) {
/* Immediately abort if the client is in the middle of something. */
- if (c->flags & REDIS_BLOCKED || c->flags & REDIS_IO_WAIT) return;
+ if (c->flags & REDIS_BLOCKED) return;
/* REDIS_CLOSE_AFTER_REPLY closes the connection once the reply is
* written to the client. Make sure to not let the reply grow after
if (p == flags) *p++ = 'N';
if (client->flags & REDIS_MULTI) *p++ = 'x';
if (client->flags & REDIS_BLOCKED) *p++ = 'b';
- if (client->flags & REDIS_IO_WAIT) *p++ = 'i';
if (client->flags & REDIS_DIRTY_CAS) *p++ = 'd';
if (client->flags & REDIS_CLOSE_AFTER_REPLY) *p++ = 'c';
if (client->flags & REDIS_UNBLOCKED) *p++ = 'u';
}
}
+/* Rewrite the command vector of the client. All the new objects ref count
+ * is incremented. The old command vector is freed, and the old objects
+ * ref count is decremented. */
void rewriteClientCommandVector(redisClient *c, int argc, ...) {
va_list ap;
int j;
/* Replace argv and argc with our new versions. */
c->argv = argv;
c->argc = argc;
+ c->cmd = lookupCommand(c->argv[0]->ptr);
+ redisAssertWithInfo(c,NULL,c->cmd != NULL);
va_end(ap);
}
+
+/* Rewrite a single item in the command vector.
+ * The new val ref count is incremented, and the old decremented. */
+void rewriteClientCommandArgument(redisClient *c, int i, robj *newval) {
+ robj *oldval;
+
+ redisAssertWithInfo(c,NULL,i < c->argc);
+ oldval = c->argv[i];
+ c->argv[i] = newval;
+ incrRefCount(newval);
+ decrRefCount(oldval);
+
+ /* If this is the command name make sure to fix c->cmd. */
+ if (i == 0) {
+ c->cmd = lookupCommand(c->argv[0]->ptr);
+ redisAssertWithInfo(c,NULL,c->cmd != NULL);
+ }
+}
projects / redis.git / blobdiff