Connect
Connect to the server with hiredis.
Basic synchronous connection
The example below creates a simple synchronous connection to a local
Redis server and tests the connection, before closing it with
redisFree(). The redisConnect() function takes just a hostname
and port as its arguments, and returns a context object.
#include <stdio.h>
#include "hiredis.h"
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// The `redisContext` type represents the connection
// to the Redis server. Here, we connect to the
// default host and port.
redisContext *c = redisConnect("127.0.0.1", 6379);
// Check if the context is null or if a specific
// error occurred.
if (c == NULL || c->err) {
if (c != NULL) {
printf("Error: %s\n", c->errstr);
// handle error
} else {
printf("Can't allocate redis context\n");
}
exit(1);
}
// Set a string key.
redisReply *reply = redisCommand(c, "SET foo bar");
printf("Reply: %s\n", reply->str); // >>> Reply: OK
freeReplyObject(reply);
// Get the key we have just stored.
reply = redisCommand(c, "GET foo");
printf("Reply: %s\n", reply->str); // >>> Reply: bar
freeReplyObject(reply);
// Close the connection.
redisFree(c);