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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <hiredis.h>
#ifdef _MSC_VER
#include <winsock2.h> /* For struct timeval */
#endif
static void example_argv_command(redisContext *c, size_t n) {
char **argv, tmp[42];
size_t *argvlen;
redisReply *reply;
/* We're allocating two additional elements for command and key */
argv = malloc(sizeof(*argv) * (2 + n));
argvlen = malloc(sizeof(*argvlen) * (2 + n));
/* First the command */
argv[0] = (char*)"RPUSH";
argvlen[0] = sizeof("RPUSH") - 1;
/* Now our key */
argv[1] = (char*)"argvlist";
argvlen[1] = sizeof("argvlist") - 1;
/* Now add the entries we wish to add to the list */
for (size_t i = 2; i < (n + 2); i++) {
argvlen[i] = snprintf(tmp, sizeof(tmp), "argv-element-%zu", i - 2);
argv[i] = strdup(tmp);
}
/* Execute the command using redisCommandArgv. We're sending the arguments with
* two explicit arrays. One for each argument's string, and the other for its
* length. */
reply = redisCommandArgv(c, n + 2, (const char **)argv, (const size_t*)argvlen);
if (reply == NULL || c->err) {
fprintf(stderr, "Error: Couldn't execute redisCommandArgv\n");
exit(1);
}
if (reply->type == REDIS_REPLY_INTEGER) {
printf("%s reply: %lld\n", argv[0], reply->integer);
}
freeReplyObject(reply);
/* Clean up */
for (size_t i = 2; i < (n + 2); i++) {
free(argv[i]);
}
free(argv);
free(argvlen);
}
int main(int argc, char **argv) {
unsigned int j, isunix = 0;
redisContext *c;
redisReply *reply;
const char *hostname = (argc > 1) ? argv[1] : "127.0.0.1";
if (argc > 2) {
if (*argv[2] == 'u' || *argv[2] == 'U') {
isunix = 1;
/* in this case, host is the path to the unix socket */
printf("Will connect to unix socket @%s\n", hostname);
}
}
int port = (argc > 2) ? atoi(argv[2]) : 6379;
struct timeval timeout = { 1, 500000 }; // 1.5 seconds
if (isunix) {
c = redisConnectUnixWithTimeout(hostname, timeout);
} else {
c = redisConnectWithTimeout(hostname, port, timeout);
}
if (c == NULL || c->err) {
if (c) {
printf("Connection error: %s\n", c->errstr);
redisFree(c);
} else {
printf("Connection error: can't allocate redis context\n");
}
exit(1);
}
/* PING server */
reply = redisCommand(c,"PING");
printf("PING: %s\n", reply->str);
freeReplyObject(reply);
/* Set a key */
reply = redisCommand(c,"SET %s %s", "foo", "hello world");
printf("SET: %s\n", reply->str);
freeReplyObject(reply);
/* Set a key using binary safe API */
reply = redisCommand(c,"SET %b %b", "bar", (size_t) 3, "hello", (size_t) 5);
printf("SET (binary API): %s\n", reply->str);
freeReplyObject(reply);
/* Try a GET and two INCR */
reply = redisCommand(c,"GET foo");
printf("GET foo: %s\n", reply->str);
freeReplyObject(reply);
reply = redisCommand(c,"INCR counter");
printf("INCR counter: %lld\n", reply->integer);
freeReplyObject(reply);
/* again ... */
reply = redisCommand(c,"INCR counter");
printf("INCR counter: %lld\n", reply->integer);
freeReplyObject(reply);
/* Create a list of numbers, from 0 to 9 */
reply = redisCommand(c,"DEL mylist");
freeReplyObject(reply);
for (j = 0; j < 10; j++) {
char buf[64];
snprintf(buf,64,"%u",j);
reply = redisCommand(c,"LPUSH mylist element-%s", buf);
freeReplyObject(reply);
}
/* Let's check what we have inside the list */
reply = redisCommand(c,"LRANGE mylist 0 -1");
if (reply->type == REDIS_REPLY_ARRAY) {
for (j = 0; j < reply->elements; j++) {
printf("%u) %s\n", j, reply->element[j]->str);
}
}
freeReplyObject(reply);
/* See function for an example of redisCommandArgv */
example_argv_command(c, 10);
/* Disconnects and frees the context */
redisFree(c);
return 0;
}
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