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proxy task is not closed imediately, result in hight CPU usage

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lxsang 2021-01-23 09:54:02 +01:00
parent 8b483f0579
commit 1f143327e4
3 changed files with 118 additions and 70 deletions
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112
http_server.c
View File

@ -1,5 +1,6 @@
//#define _GNU_SOURCE
#include <sys/socket.h>
#include <sys/select.h>
#include <poll.h>
#include <netinet/in.h>
#include <dlfcn.h>
#include <sys/stat.h>
@ -301,24 +302,26 @@ void *accept_request(void *data)
task = antd_create_task(NULL, (void *)rq, NULL, rq->client->last_io);
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_WRITABLE | TASK_EVT_ON_READABLE);
fd_set read_flags, write_flags;
// first verify if the socket is ready
antd_client_t *client = (antd_client_t *)rq->client;
FD_ZERO(&read_flags);
FD_SET(rq->client->sock, &read_flags);
FD_ZERO(&write_flags);
FD_SET(rq->client->sock, &write_flags);
struct timeval timeout;
timeout.tv_sec = 0;
timeout.tv_usec = 500;
// select
int sel = select(client->sock + 1, &read_flags, &write_flags, (fd_set *)0, &timeout);
struct pollfd pfd[1];
pfd[0].fd = client->sock;
pfd[0].events = POLLIN | POLLOUT;
int sel = poll(pfd, 1, POLL_EVENT_TO);
if (sel == -1)
{
antd_error(rq->client, 400, "Bad request");
return task;
}
if (sel == 0 || (!FD_ISSET(client->sock, &read_flags) && !FD_ISSET(client->sock, &write_flags)))
if(pfd[0].revents & POLLERR || pfd[0].revents & POLLHUP)
{
antd_error(rq->client, 400, "Bad request");
return task;
}
if (sel == 0 || (!(pfd[0].revents & POLLIN) && !(pfd[0].revents & POLLOUT)))
{
task->handle = accept_request;
return task;
@ -354,7 +357,7 @@ void *accept_request(void *data)
}
else
{
if (!FD_ISSET(client->sock, &read_flags))
if (!((pfd[0].revents & POLLIN)))
{
task->handle = accept_request;
return task;
@ -756,59 +759,63 @@ static void *proxy_monitor(void *data)
{
antd_request_t *rq = (antd_request_t *)data;
antd_client_t *proxy = (antd_client_t *)dvalue(rq->request, "PROXY_HANDLE");
char* method = (char *)dvalue(rq->request, "METHOD");
antd_task_t *task = antd_create_task(NULL, data, NULL, rq->client->last_io);
int ret, max_fd;
fd_set read_flags, write_flags;
// first verify if the socket is ready
FD_ZERO(&read_flags);
FD_SET(rq->client->sock, &read_flags);
FD_SET(proxy->sock, &read_flags);
FD_ZERO(&write_flags);
FD_SET(rq->client->sock, &write_flags);
//FD_SET(proxy->sock, &write_flags);
int ret, sz;
struct pollfd pfd[2];
char *buf = NULL;
struct timeval timeout;
timeout.tv_sec = 0;
timeout.tv_usec = 5000;
max_fd = proxy->sock > rq->client->sock ? proxy->sock: rq->client->sock;
buf = (char *)malloc(BUFFLEN);
//printf("start proxy monitor\n");
// select
do
pfd[0].fd = rq->client->sock;
pfd[1].fd = proxy->sock;
pfd[1].events = POLLIN;
pfd[0].events = POLLIN;
if(rq->client->ssl)
{
ret = select(max_fd + 1, &read_flags, &write_flags, (fd_set *)0, &timeout);
pfd[0].events |= POLLOUT;
}
// select
ret = poll(pfd, 2, POLL_EVENT_TO);
if (ret > 0)
{
if(
pfd[0].revents & POLLERR ||
pfd[0].revents & POLLRDHUP ||
pfd[0].revents & POLLHUP ||
pfd[0].revents & POLLNVAL||
pfd[1].revents & POLLERR ||
pfd[1].revents & POLLHUP ||
pfd[1].revents & POLLRDHUP ||
pfd[1].revents & POLLNVAL
)
{
(void)close(proxy->sock);
return task;
}
buf = (char *)malloc(BUFFLEN);
memset(buf, '\0', BUFFLEN);
if (FD_ISSET(rq->client->sock, &read_flags) || FD_ISSET(rq->client->sock, &write_flags))
if ((pfd[0].revents & POLLIN) || (pfd[0].revents & POLLOUT))
{
ret = antd_recv_upto(rq->client, buf, BUFFLEN);
if(ret == -1)
sz = antd_recv_upto(rq->client, buf, BUFFLEN);
if ( (sz < 0) || (sz == 0 && !rq->client->ssl) || ( antd_send(proxy, buf, sz) != sz ))
{
free(buf);
(void)close(proxy->sock);
return task;
}
antd_send(proxy, buf, ret);
}
if (FD_ISSET(proxy->sock, &read_flags))
if (pfd[1].revents & POLLIN)
{
ret = antd_recv_upto(proxy, buf, BUFFLEN);
if(ret == -1)
if ((sz = antd_recv_upto(proxy, buf, BUFFLEN)) <= 0 || antd_send(rq->client, buf, sz) != sz)
{
free(buf);
(void)close(proxy->sock);
return task;
}
antd_send(rq->client, buf, ret);
}
}
} while (ret > 0);
free(buf);
//printf("monitor return: %d\n", ret);
if(ret == -1)
}
if (ret < 0)
{
(void)close(proxy->sock);
return task;
@ -817,7 +824,14 @@ static void *proxy_monitor(void *data)
task->handle = proxy_monitor;
task->access_time = rq->client->last_io;
// register event
if(rq->client->ssl && (EQU(method, "POST") || ws_enable(rq->request)))
{
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_READABLE | TASK_EVT_ON_WRITABLE);
}
else
{
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_READABLE );
}
antd_task_bind_event(task, proxy->sock, 0, TASK_EVT_ON_READABLE);
return task;
}
@ -834,6 +848,7 @@ static void *proxify(void *data)
char *path = dvalue(rq->request, "PROXY_PATH");
char *query = dvalue(rq->request, "PROXY_QUERY");
dictionary_t xheader = dvalue(rq->request, "REQUEST_HEADER");
char* method = (char *)dvalue(rq->request, "METHOD");
antd_task_t *task = antd_create_task(NULL, data, NULL, rq->client->last_io);
if (!xheader)
{
@ -852,6 +867,7 @@ static void *proxify(void *data)
proxy->ssl = NULL;
proxy->zstream = NULL;
proxy->z_level = ANTD_CNONE;
// store content length here
dput(rq->request, "PROXY_HANDLE", proxy);
str = __s("%s %s?%s HTTP/1.1\r\n", (char *)dvalue(rq->request, "METHOD"), path, query);
@ -882,7 +898,15 @@ static void *proxify(void *data)
task->handle = proxy_monitor;
task->access_time = rq->client->last_io;
// register event
if(rq->client->ssl && (EQU(method, "POST") || ws_enable(rq->request)))
{
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_READABLE | TASK_EVT_ON_WRITABLE);
}
else
{
antd_task_bind_event(task, rq->client->sock, 0, TASK_EVT_ON_READABLE );
}
antd_task_bind_event(task, proxy->sock, 0, TASK_EVT_ON_READABLE);
return task;
}

31
lib/scheduler.c
View File

@ -12,7 +12,6 @@
#define MAX_VALIDITY_INTERVAL 60 // 1minute
#define MAX_FIFO_NAME_SZ 255
#define POLL_EVENT_TO 100 // ms
// callback definition
struct _antd_callback_t
@ -210,6 +209,7 @@ static void destroy_queue(antd_queue_t q, int is_task)
if (it->raw_ptr)
{
free(it->raw_ptr);
it->raw_ptr = NULL;
}
}
// then free the placeholder
@ -637,7 +637,15 @@ static void task_polls_collect(bst_node_t* node, void** argv, int argc)
}
}
}
static void antd_deploy_task(bst_node_t* node, void** argv, int argc)
{
UNUSED(argc);
if(!node || !node->data)
return;
antd_scheduler_t* sched = (antd_scheduler_t*) argv[0];
antd_task_t* task = node->data;
antd_task_schedule(sched, task);
}
static void task_event_collect(bst_node_t* node, void** argv, int argc)
{
UNUSED(argc);
@ -690,6 +698,7 @@ void *antd_scheduler_wait(void *ptr)
void *argv[3];
antd_queue_t exec_list = NULL;
bst_node_t* poll_list = NULL;
bst_node_t* scheduled_list = NULL;
antd_queue_item_t it = NULL;
antd_queue_item_t curr = NULL;
antd_task_evt_item_t *eit = NULL;
@ -745,9 +754,12 @@ void *antd_scheduler_wait(void *ptr)
{
// find the event
task_node = NULL;
eit = NULL;
node = bst_find(poll_list,i);
if(node)
{
eit = (antd_task_evt_item_t *)node->data;
}
if(eit)
{
if( ((eit->flags & TASK_EVT_ON_READABLE) && (pfds[i].revents & POLLIN))
@ -760,7 +772,8 @@ void *antd_scheduler_wait(void *ptr)
scheduler->task_queue = bst_delete(scheduler->task_queue, eit->task->id);
pthread_mutex_unlock(&scheduler->scheduler_lock);
if(task_node)
antd_task_schedule(scheduler, eit->task);
scheduled_list = bst_insert(scheduled_list, eit->task->id, eit->task);
//antd_task_schedule(scheduler, eit->task);
}
else if( (pfds[i].revents & POLLERR) || (pfds[i].revents & POLLHUP) ) {
// task is no longer available
@ -774,7 +787,13 @@ void *antd_scheduler_wait(void *ptr)
}
}
}
if(scheduled_list)
{
argv[0] = scheduler;
bst_for_each(scheduled_list, antd_deploy_task, argv, 1);
bst_free(scheduled_list);
scheduled_list = NULL;
}
}
free(pfds);
}
@ -801,6 +820,10 @@ int antd_scheduler_ok(antd_scheduler_t *scheduler)
int antd_scheduler_next_id(antd_scheduler_t *sched, int input)
{
int id = input;
if(sched->id_allocator < 0)
{
sched->id_allocator = 0;
}
pthread_mutex_lock(&sched->scheduler_lock);
if (id == 0)
{

1
lib/scheduler.h
View File

@ -11,6 +11,7 @@
#define TASK_EVT_ON_READABLE 0x02
#define TASK_EVT_ON_WRITABLE 0x04
#define TASK_EVT_ON_TIMEOUT 0x08
#define POLL_EVENT_TO 100 // ms
typedef struct _antd_scheduler_t antd_scheduler_t;
typedef struct _antd_callback_t antd_callback_t;