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#include <uwsgi.h>
extern struct uwsgi_server uwsgi;
struct uwsgi_redislog_state {
int fd;
char *password;
char *address;
char *id;
char *command;
char *prefix;
char msgsize[11];
struct iovec iovec[7];
char response[8];
};
static char *uwsgi_redis_logger_build_command(char *src) {
ssize_t len = 4096;
char *dst = uwsgi_calloc(len);
char *orig_dst = dst;
int count = 2;
char *ptr = src;
// first of all, count the number of spaces
while(*ptr++) { if (*ptr == ' ') count++; }
int pos = snprintf(dst, 4096, "*%d\r\n", count);
dst+=pos;
len -= pos;
ptr = src;
char *base = src;
while(*ptr++) {
if (*ptr == ' ') {
pos = snprintf(dst, len, "$%d\r\n%.*s\r\n", (int) (ptr-base), (int) (ptr-base), base);
if (pos >= len || pos < 0) {
// i do not know what to do, better to exit...
exit(1);
}
base = ptr+1;
dst+=pos;
len-= pos;
}
}
pos = snprintf(dst, len, "$%d\r\n%.*s\r\n", (int) ((ptr-1)-base), (int) ((ptr-1)-base), base);
if (pos > len || pos < 0) {
// i do not know what to do, better to exit...
exit(1);
}
return orig_dst;
}
static ssize_t uwsgi_redis_logger_discard_response(struct uwsgi_redislog_state *uredislog) {
ssize_t ret = 0, ret2;
again:
// read til a \n is found (ugly but fast)
ret2 = read(uredislog->fd, uredislog->response, 8);
if (ret2 <= 0) {
close(uredislog->fd);
uredislog->fd = -1;
return -1;
}
ret += ret2;
if (!memchr(uredislog->response, '\n', ret2)) {
goto again;
}
return ret;
}
ssize_t uwsgi_redis_logger(struct uwsgi_logger *ul, char *message, size_t len) {
ssize_t ret;
struct uwsgi_redislog_state *uredislog = NULL;
if (!ul->configured) {
if (!ul->data) {
ul->data = uwsgi_calloc(sizeof(struct uwsgi_redislog_state));
uredislog = (struct uwsgi_redislog_state *) ul->data;
}
if (ul->arg != NULL) {
char *logarg = uwsgi_str(ul->arg);
char *at = strchr(logarg, '@');
if (at) {
*at = 0;
uredislog->password = logarg;
logarg = at + 1;
}
char *comma1 = strchr(logarg, ',');
if (!comma1) {
char *slash = strchr(logarg, '/');
if (slash) {
*slash = 0;
uredislog->id = slash + 1;
}
uredislog->address = uwsgi_resolve_ip(logarg);
goto done;
}
*comma1 = 0;
char *slash = strchr(logarg, '/');
if (slash) {
*slash = 0;
uredislog->id = slash + 1;
}
uredislog->address = logarg;
comma1++;
if (*comma1 == 0) goto done;
char *comma2 = strchr(comma1,',');
if (!comma2) {
uredislog->command = uwsgi_redis_logger_build_command(comma1);
goto done;
}
*comma2 = 0;
uredislog->command = uwsgi_redis_logger_build_command(comma1);
comma2++;
if (*comma2 == 0) goto done;
uredislog->prefix = comma2;
}
done:
if (!uredislog->password) uredislog->password = NULL;
if (!uredislog->id) uredislog->id = "0";
if (!uredislog->address) uredislog->address = uwsgi_str("127.0.0.1:6379");
if (!uredislog->command) uredislog->command = "*3\r\n$7\r\npublish\r\n$5\r\nuwsgi\r\n";
if (!uredislog->prefix) uredislog->prefix = "";
uredislog->fd = -1;
uredislog->iovec[0].iov_base = uredislog->command;
uredislog->iovec[0].iov_len = strlen(uredislog->command);
uredislog->iovec[1].iov_base = "$";
uredislog->iovec[1].iov_len = 1;
uredislog->iovec[2].iov_base = uredislog->msgsize;
uredislog->iovec[3].iov_base = "\r\n";
uredislog->iovec[3].iov_len = 2;
uredislog->iovec[4].iov_base = uredislog->prefix;
uredislog->iovec[4].iov_len = strlen(uredislog->prefix);
uredislog->iovec[6].iov_base = "\r\n";
uredislog->iovec[6].iov_len = 2;
ul->configured = 1;
}
uredislog = (struct uwsgi_redislog_state *) ul->data;
if (uredislog->fd == -1) {
struct iovec setup_iov;
char setup_buf[4096];
uredislog->fd = uwsgi_connect(uredislog->address, uwsgi.socket_timeout, 0);
if (uredislog->password) {
setup_iov.iov_len = snprintf(
setup_buf, sizeof (setup_buf), "*2\r\n$4\r\nauth\r\n$%zu\r\n%*s\r\n",
strlen(uredislog->password), (int)strlen(uredislog->password), uredislog->password);
setup_iov.iov_base = setup_buf;
ret = writev(uredislog->fd, &setup_iov, 1);
if (ret <= 0) {
close(uredislog->fd);
uredislog->fd = -1;
return -1;
}
uwsgi_redis_logger_discard_response(uredislog);
}
if (uredislog->id) {
setup_iov.iov_len = snprintf(
setup_buf, sizeof (setup_buf), "*2\r\n$6\r\nselect\r\n$%zu\r\n%*s\r\n",
strlen(uredislog->id), (int)strlen(uredislog->id), uredislog->id);
setup_iov.iov_base = setup_buf;
ret = writev(uredislog->fd, &setup_iov, 1);
if (ret <= 0) {
close(uredislog->fd);
uredislog->fd = -1;
return -1;
}
uwsgi_redis_logger_discard_response(uredislog);
}
}
if (uredislog->fd == -1) return -1;
// drop newline
if (message[len-1] == '\n') len--;
uwsgi_num2str2(len + uredislog->iovec[4].iov_len, uredislog->msgsize);
uredislog->iovec[2].iov_len = strlen(uredislog->msgsize);
uredislog->iovec[5].iov_base = message;
uredislog->iovec[5].iov_len = len;
ret = writev(uredislog->fd, uredislog->iovec, 7);
if (ret <= 0) {
close(uredislog->fd);
uredislog->fd = -1;
return -1;
}
uwsgi_redis_logger_discard_response(uredislog);
return ret;
}
void uwsgi_redislog_register() {
uwsgi_register_logger("redislog", uwsgi_redis_logger);
}
struct uwsgi_plugin redislog_plugin = {
.name = "redislog",
.on_load = uwsgi_redislog_register,
};
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