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#include "worker.h"
#include "client.h"
#include "http.h"
#include "cmd.h"
#include "pool.h"
#include "slog.h"
#include "websocket.h"
#include "conf.h"
#include "server.h"
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <event.h>
#include <string.h>
struct worker *
worker_new(struct server *s) {
int ret;
struct worker *w = calloc(1, sizeof(struct worker));
w->s = s;
/* setup communication link */
ret = pipe(w->link);
(void)ret;
/* Redis connection pool */
w->pool = pool_new(w, s->cfg->pool_size_per_thread);
return w;
}
void
worker_can_read(int fd, short event, void *p) {
struct http_client *c = p;
int ret, nparsed;
(void)fd;
(void)event;
ret = http_client_read(c);
if(ret <= 0) {
if((client_error_t)ret == CLIENT_DISCONNECTED) {
return;
} else if (c->failed_alloc || (client_error_t)ret == CLIENT_OOM) {
slog(c->w->s, WEBDIS_DEBUG, "503", 3);
http_send_error(c, 503, "Service Unavailable");
return;
}
}
if(c->is_websocket) {
/* Got websocket data */
ws_add_data(c);
} else {
/* run parser */
nparsed = http_client_execute(c);
if(c->failed_alloc) {
slog(c->w->s, WEBDIS_DEBUG, "503", 3);
http_send_error(c, 503, "Service Unavailable");
} else if (c->parser.flags & F_CONNECTION_CLOSE) {
c->broken = 1;
} else if(c->is_websocket) {
/* we need to use the remaining (unparsed) data as the body. */
if(nparsed < ret) {
http_client_add_to_body(c, c->buffer + nparsed + 1, c->sz - nparsed - 1);
ws_handshake_reply(c);
} else {
c->broken = 1;
}
free(c->buffer);
c->buffer = NULL;
c->sz = 0;
} else if(nparsed != ret) {
slog(c->w->s, WEBDIS_DEBUG, "400", 3);
http_send_error(c, 400, "Bad Request");
} else if(c->request_sz > c->s->cfg->http_max_request_size) {
slog(c->w->s, WEBDIS_DEBUG, "413", 3);
http_send_error(c, 413, "Request Entity Too Large");
}
}
if(c->broken) { /* terminate client */
http_client_free(c);
} else {
/* start monitoring input again */
worker_monitor_input(c);
}
}
/**
* Monitor client FD for possible reads.
*/
void
worker_monitor_input(struct http_client *c) {
event_set(&c->ev, c->fd, EV_READ, worker_can_read, c);
event_base_set(c->w->base, &c->ev);
event_add(&c->ev, NULL);
}
/**
* Called when a client is sent to this worker.
*/
static void
worker_on_new_client(int pipefd, short event, void *ptr) {
struct http_client *c;
unsigned long addr;
(void)event;
(void)ptr;
/* Get client from messaging pipe */
int ret = read(pipefd, &addr, sizeof(addr));
if(ret == sizeof(addr)) {
c = (struct http_client*)addr;
/* monitor client for input */
worker_monitor_input(c);
}
}
static void
worker_pool_connect(struct worker *w) {
int i;
/* create connections */
for(i = 0; i < w->pool->count; ++i) {
pool_connect(w->pool, w->s->cfg->database, 1);
}
}
static void*
worker_main(void *p) {
struct worker *w = p;
struct event ev;
/* setup libevent */
w->base = event_base_new();
/* monitor pipe link */
event_set(&ev, w->link[0], EV_READ | EV_PERSIST, worker_on_new_client, w);
event_base_set(w->base, &ev);
event_add(&ev, NULL);
/* connect to Redis */
worker_pool_connect(w);
/* loop */
event_base_dispatch(w->base);
return NULL;
}
void
worker_start(struct worker *w) {
pthread_create(&w->thread, NULL, worker_main, w);
}
/**
* Queue new client to process
*/
void
worker_add_client(struct worker *w, struct http_client *c) {
/* write into pipe link */
unsigned long addr = (unsigned long)c;
int ret = write(w->link[1], &addr, sizeof(addr));
(void)ret;
}
/**
* Called when a client has finished reading input and can create a cmd
*/
void
worker_process_client(struct http_client *c) {
/* check that the command can be executed */
struct worker *w = c->w;
cmd_response_t ret = CMD_PARAM_ERROR;
switch(c->parser.method) {
case HTTP_GET:
if(c->path_sz == 16 && memcmp(c->path, "/crossdomain.xml", 16) == 0) {
http_crossdomain(c);
return;
}
slog(w->s, WEBDIS_DEBUG, c->path, c->path_sz);
ret = cmd_run(c->w, c, 1+c->path, c->path_sz-1, NULL, 0);
break;
case HTTP_POST:
slog(w->s, WEBDIS_DEBUG, c->path, c->path_sz);
ret = cmd_run(c->w, c, c->body, c->body_sz, NULL, 0);
break;
case HTTP_PUT:
slog(w->s, WEBDIS_DEBUG, c->path, c->path_sz);
ret = cmd_run(c->w, c, 1+c->path, c->path_sz-1,
c->body, c->body_sz);
break;
case HTTP_OPTIONS:
http_send_options(c);
return;
default:
slog(w->s, WEBDIS_DEBUG, "405", 3);
http_send_error(c, 405, "Method Not Allowed");
return;
}
switch(ret) {
case CMD_ACL_FAIL:
case CMD_PARAM_ERROR:
slog(w->s, WEBDIS_DEBUG, "403", 3);
http_send_error(c, 403, "Forbidden");
break;
case CMD_REDIS_UNAVAIL:
slog(w->s, WEBDIS_DEBUG, "503", 3);
http_send_error(c, 503, "Service Unavailable");
break;
default:
break;
}
}
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