mirror of
https://github.com/clearlinux/uwsgi.git
synced 2026-09-08 14:41:55 +00:00
487 lines
11 KiB
C
487 lines
11 KiB
C
#ifdef UWSGI_SPOOLER
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#include "uwsgi.h"
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extern struct uwsgi_server uwsgi;
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static void spooler_readdir(char *);
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#ifdef __linux__
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static void spooler_scandir(char *);
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#endif
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void spooler_manage_task(char *, char *);
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// fake function to allow waking the spooler
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void spooler_wakeup() {}
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pid_t spooler_start() {
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int i;
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pid_t pid = uwsgi_fork("uWSGI spooler");
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if (pid < 0) {
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uwsgi_error("fork()");
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exit(1);
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}
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else if (pid == 0) {
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// USR1 will be used to wake up the spooler
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signal(SIGUSR1, spooler_wakeup);
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uwsgi.mywid = -1;
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uwsgi.mypid = getpid();
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// avoid race conditions !!!
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uwsgi.shared->spooler_pid = uwsgi.mypid;
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uwsgi_fixup_fds(0, 0);
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uwsgi_close_all_sockets();
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for (i = 0; i < 0xFF; i++) {
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if (uwsgi.p[i]->post_fork) {
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uwsgi.p[i]->post_fork();
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}
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}
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uwsgi.signal_socket = uwsgi.shared->spooler_signal_pipe[1];
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for (i = 0; i < 0xFF; i++) {
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if (uwsgi.p[i]->spooler_init) {
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uwsgi.p[i]->spooler_init();
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}
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}
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for (i = 0; i < uwsgi.gp_cnt; i++) {
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if (uwsgi.gp[i]->spooler_init) {
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uwsgi.gp[i]->spooler_init();
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}
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}
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spooler();
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}
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else if (pid > 0) {
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uwsgi_log("spawned the uWSGI spooler on dir %s with pid %d\n", uwsgi.spool_dir, pid);
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}
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return pid;
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}
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void destroy_spool(char *dir, char *file) {
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if (chdir(dir)) {
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uwsgi_error("chdir()");
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uwsgi_log("something horrible happened to the spooler. Better to kill it.\n");
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exit(1);
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}
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if (unlink(file)) {
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uwsgi_error("unlink()");
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uwsgi_log("something horrible happened to the spooler. Better to kill it.\n");
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exit(1);
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}
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}
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int spool_request(char *filename, int rn, int core_id, char *buffer, int size, char *priority, time_t at, char *body, size_t body_len) {
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struct timeval tv;
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int fd;
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struct uwsgi_header uh;
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uwsgi_lock(uwsgi.spooler_lock);
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gettimeofday(&tv, NULL);
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if (priority) {
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if (snprintf(filename, 1024, "%s/%s", uwsgi.spool_dir, priority) <= 0) {
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uwsgi_unlock(uwsgi.spooler_lock);
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return 0;
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}
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// no need to check for errors...
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(void) mkdir(filename, 0777);
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if (snprintf(filename, 1024, "%s/%s/uwsgi_spoolfile_on_%s_%d_%d_%d_%llu_%llu", uwsgi.spool_dir, priority, uwsgi.hostname, (int) getpid(), rn, core_id, (unsigned long long) tv.tv_sec, (unsigned long long) tv.tv_usec) <= 0) {
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uwsgi_unlock(uwsgi.spooler_lock);
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return 0;
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}
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}
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else {
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if (snprintf(filename, 1024, "%s/uwsgi_spoolfile_on_%s_%d_%d_%d_%llu_%llu", uwsgi.spool_dir, uwsgi.hostname, (int) getpid(), rn, core_id, (unsigned long long) tv.tv_sec, (unsigned long long) tv.tv_usec) <= 0) {
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uwsgi_unlock(uwsgi.spooler_lock);
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return 0;
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}
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}
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fd = open(filename, O_CREAT | O_EXCL | O_WRONLY, S_IRUSR | S_IWUSR);
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if (fd < 0) {
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uwsgi_error_open(filename);
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uwsgi_unlock(uwsgi.spooler_lock);
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return 0;
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}
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#ifdef __sun__
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if (lockf(fd, F_LOCK, 0)) {
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uwsgi_error("lockf()");
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#else
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if (flock(fd, LOCK_EX)) {
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uwsgi_error("flock()");
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#endif
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close(fd);
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uwsgi_unlock(uwsgi.spooler_lock);
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return 0;
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}
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uh.modifier1 = 17;
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uh.modifier2 = 0;
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uh.pktsize = (uint16_t) size;
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#ifdef __BIG_ENDIAN__
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uh.pktsize = uwsgi_swap16(uh.pktsize);
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#endif
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if (write(fd, &uh, 4) != 4) {
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goto clear;
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}
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if (write(fd, buffer, size) != size) {
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goto clear;
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}
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if (body && body_len > 0) {
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if ((size_t)write(fd, body, body_len) != body_len) {
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goto clear;
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}
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}
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if (at > 0) {
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struct timeval tv[2];
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tv[0].tv_sec = at;
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tv[0].tv_usec = 0;
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tv[1].tv_sec = at;
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tv[1].tv_usec = 0;
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#ifdef __sun__
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if (futimesat(fd, NULL, tv)) {
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#else
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if (futimes(fd, tv)) {
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#endif
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uwsgi_error("futimes()");
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}
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}
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close(fd);
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uwsgi_log("written %d bytes to spool file %s\n", size + body_len + 4, filename);
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uwsgi_unlock(uwsgi.spooler_lock);
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/* wake up the spooler ... (HACKY) */
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if (uwsgi.shared->spooler_pid > 0 ) {
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(void) kill(uwsgi.shared->spooler_pid, SIGUSR1);
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}
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return 1;
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clear:
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uwsgi_unlock(uwsgi.spooler_lock);
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uwsgi_error("write()");
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if (unlink(filename)) {
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uwsgi_error("unlink()");
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}
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close(fd);
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return 0;
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}
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void spooler() {
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// prevent process blindly reading stdin to make mess
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int nullfd;
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// asked by Marco Beri
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#ifdef __HAIKU__
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#ifdef UWSGI_DEBUG
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uwsgi_log("lowering spooler priority to %d\n", B_LOW_PRIORITY);
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#endif
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set_thread_priority(find_thread(NULL), B_LOW_PRIORITY);
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#else
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#ifdef UWSGI_DEBUG
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uwsgi_log("lowering spooler priority to %d\n", PRIO_MAX);
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#endif
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setpriority(PRIO_PROCESS, getpid(), PRIO_MAX);
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#endif
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nullfd = open("/dev/null", O_RDONLY);
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if (nullfd < 0) {
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uwsgi_error_open("/dev/null");
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exit(1);
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}
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if (nullfd != 0) {
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dup2(nullfd, 0);
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close(nullfd);
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}
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int spooler_event_queue = event_queue_init();
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int interesting_fd = -1;
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if (uwsgi.master_process) {
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event_queue_add_fd_read(spooler_event_queue, uwsgi.shared->spooler_signal_pipe[1]);
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}
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for (;;) {
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if (chdir(uwsgi.spool_dir)) {
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uwsgi_error("chdir()");
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exit(1);
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}
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if (uwsgi.spooler_ordered) {
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#ifdef __linux__
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spooler_scandir(uwsgi.spool_dir);
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#else
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spooler_readdir(uwsgi.spool_dir);
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#endif
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}
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else {
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spooler_readdir(uwsgi.spool_dir);
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}
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if (event_queue_wait(spooler_event_queue, uwsgi.shared->spooler_frequency, &interesting_fd) > 0) {
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if (uwsgi.master_process) {
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if (interesting_fd == uwsgi.shared->spooler_signal_pipe[1]) {
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uint8_t uwsgi_signal;
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if (read(interesting_fd, &uwsgi_signal, 1) <= 0) {
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uwsgi_log_verbose("uWSGI spooler screams: UAAAAAAH my master died, i will follow him...\n");
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end_me(0);
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}
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else {
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#ifdef UWSGI_DEBUG
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uwsgi_log_verbose("master sent signal %d to the spooler\n", uwsgi_signal);
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#endif
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if (uwsgi_signal_handler(uwsgi_signal)) {
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uwsgi_log_verbose("error managing signal %d on the spooler\n", uwsgi_signal);
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}
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}
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}
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}
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}
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}
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}
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#ifdef __linux__
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static void spooler_scandir(char *dir) {
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struct dirent **tasklist;
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int n;
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n = scandir(dir, &tasklist, 0, versionsort);
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if (n < 0) {
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uwsgi_error("scandir()");
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return;
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}
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while(n--) {
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spooler_manage_task(dir, tasklist[n]->d_name);
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free(tasklist[n]);
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}
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free(tasklist);
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}
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#endif
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static void spooler_readdir(char *dir) {
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DIR *sdir;
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struct dirent *dp;
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sdir = opendir(dir);
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if (sdir) {
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while ((dp = readdir(sdir)) != NULL) {
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spooler_manage_task(dir, dp->d_name);
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}
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closedir(sdir);
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}
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else {
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uwsgi_error("opendir()");
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}
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}
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void spooler_manage_task(char *dir, char *task) {
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int i, ret;
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char spool_buf[0xffff];
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struct uwsgi_header uh;
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char *body = NULL;
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size_t body_len = 0;
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int spool_fd;
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if (!strncmp("uwsgi_spoolfile_on_", task, 19) || (uwsgi.spooler_ordered && is_a_number(task))) {
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struct stat sf_lstat;
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if (lstat(task, &sf_lstat)) {
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return;
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}
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// a spool request for the future
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if (sf_lstat.st_mtime > time(NULL)) {
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return;
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}
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#ifdef __linux__
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if (S_ISDIR(sf_lstat.st_mode) && uwsgi.spooler_ordered) {
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if (chdir(task)) {
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uwsgi_error("chdir()");
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return;
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}
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char *prio_path = realpath(".", NULL);
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spooler_scandir(prio_path);
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free(prio_path);
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if (chdir(dir)) {
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uwsgi_error("chdir()");
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}
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return;
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}
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#endif
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if (!S_ISREG(sf_lstat.st_mode)) {
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return;
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}
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if (!access(task, R_OK | W_OK)) {
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uwsgi_log("managing spool request %s ...\n", task);
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#ifdef __sun__
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// lockf needs write permission
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spool_fd = open(task, O_RDWR);
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#else
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spool_fd = open(task, O_RDONLY);
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#endif
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if (spool_fd < 0) {
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uwsgi_error_open(task);
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return;
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}
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#ifdef __sun__
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if (lockf(spool_fd, F_LOCK, 0)) {
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uwsgi_error("lockf()");
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#else
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if (flock(spool_fd, LOCK_EX)) {
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uwsgi_error("flock()");
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#endif
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close(spool_fd);
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return;
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}
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if (read(spool_fd, &uh, 4) != 4) {
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uwsgi_error("read()");
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close(spool_fd);
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return;
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}
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#ifdef __BIG_ENDIAN__
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uh.pktsize = uwsgi_swap16(uh.pktsize);
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#endif
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if (read(spool_fd, spool_buf, uh.pktsize) != uh.pktsize) {
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uwsgi_error("read()");
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destroy_spool(dir, task);
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close(spool_fd);
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return;
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}
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// body available ?
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if (sf_lstat.st_size > (uh.pktsize+4)) {
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body_len = sf_lstat.st_size - (uh.pktsize+4);
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body = uwsgi_malloc(body_len);
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if ((size_t)read(spool_fd, body, body_len) != body_len) {
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uwsgi_error("read()");
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destroy_spool(dir, task);
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close(spool_fd);
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free(body);
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return;
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}
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}
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close(spool_fd);
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if (uwsgi.spooler_chdir) {
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if (chdir(uwsgi.spooler_chdir)) {
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uwsgi_error("chdir()");
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}
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}
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int callable_found = 0;
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for(i=0;i<0xff;i++) {
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if (uwsgi.p[i]->spooler) {
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time_t now = time(NULL);
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if(uwsgi.shared->options[UWSGI_OPTION_SPOOLER_HARAKIRI] > 0) {
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set_spooler_harakiri(uwsgi.shared->options[UWSGI_OPTION_SPOOLER_HARAKIRI]);
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}
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ret = uwsgi.p[i]->spooler(task, spool_buf, uh.pktsize, body, body_len);
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if(uwsgi.shared->options[UWSGI_OPTION_SPOOLER_HARAKIRI] > 0) {
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set_spooler_harakiri(0);
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}
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if (body) {
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free(body);
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}
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if (ret == 0) continue;
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callable_found = 1;
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if (ret == -2) {
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uwsgi_log("done with task/spool %s after %d seconds\n", task, time(NULL)-now);
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destroy_spool(dir, task);
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}
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// re-spool it
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break;
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}
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}
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if (!callable_found) {
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uwsgi_log("unable to find the spooler function, have you loaded it into the spooler process ?\n");
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}
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}
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}
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}
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int uwsgi_request_spooler(struct wsgi_request *wsgi_req) {
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int i;
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char spool_filename[1024];
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if (uwsgi.spool_dir == NULL) {
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uwsgi_log("the spooler is inactive !!!...skip\n");
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uwsgi_send_empty_pkt(wsgi_req->poll.fd, NULL, 255, 0);
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return -1;
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}
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i = spool_request(spool_filename, uwsgi.workers[0].requests + 1, wsgi_req->async_id, wsgi_req->buffer, wsgi_req->uh.pktsize, NULL, 0, NULL, 0);
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wsgi_req->uh.modifier1 = 255;
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wsgi_req->uh.pktsize = 0;
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if (i > 0) {
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wsgi_req->uh.modifier2 = 1;
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if (write(wsgi_req->poll.fd, wsgi_req, 4) != 4) {
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uwsgi_log("disconnected client, remove spool file.\n");
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/* client disconnect, remove spool file */
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if (unlink(spool_filename)) {
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uwsgi_error("unlink()");
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uwsgi_log("something horrible happened !!! check your spooler ASAP !!!\n");
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exit(1);
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}
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}
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return 0;
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}
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else {
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/* announce a failed spool request */
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wsgi_req->uh.modifier2 = 0;
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i = write(wsgi_req->poll.fd, wsgi_req, 4);
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if (i != 4) {
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uwsgi_error("write()");
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}
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}
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return -1;
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}
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#else
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#warning "*** Spooler support is disabled ***"
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#endif
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