mirror of
https://github.com/osnr/TabFS.git
synced 2024-05-17 21:16:35 +02:00
e734173e6f
direct_io option makes it reliably change. Big speedup from... removing prints. Did I even need multithreading?
391 lines
10 KiB
C
391 lines
10 KiB
C
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <pthread.h>
|
|
#include <fuse.h>
|
|
|
|
#define WBY_STATIC
|
|
#define WBY_IMPLEMENTATION
|
|
#define WBY_USE_FIXED_TYPES
|
|
#define WBY_USE_ASSERT
|
|
#include "mmx/web.h"
|
|
|
|
#include "cJSON/cJSON.h"
|
|
#include "cJSON/cJSON.c"
|
|
|
|
struct wby_server server;
|
|
struct wby_con *con = NULL;
|
|
|
|
pthread_cond_t queue_cv = PTHREAD_COND_INITIALIZER;
|
|
pthread_mutex_t queue_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
enum request_response_state {
|
|
EMPTY = 0,
|
|
SEND_REQUEST,
|
|
RECEIVE_RESPONSE,
|
|
HANDLE_RESPONSE
|
|
};
|
|
|
|
struct request_response {
|
|
enum request_response_state state;
|
|
|
|
char *request;
|
|
cJSON *response;
|
|
|
|
clock_t start;
|
|
};
|
|
|
|
#define REQUEST_RESPONSE_QUEUE_SIZE 128
|
|
typedef int request_id;
|
|
struct request_response queue[REQUEST_RESPONSE_QUEUE_SIZE];
|
|
|
|
static request_id enqueue_request(cJSON *req) {
|
|
pthread_mutex_lock(&queue_mutex);
|
|
|
|
// Look for the first free slot.
|
|
request_id id;
|
|
for (id = 0; id < REQUEST_RESPONSE_QUEUE_SIZE; id++) {
|
|
if (queue[id].state == EMPTY) break;
|
|
}
|
|
if (id >= REQUEST_RESPONSE_QUEUE_SIZE) {
|
|
printf("Request-response queue is full!\n");
|
|
exit(1);
|
|
}
|
|
cJSON_AddNumberToObject(req, "id", id);
|
|
|
|
queue[id].state = SEND_REQUEST;
|
|
queue[id].request = cJSON_Print(req);
|
|
queue[id].response = NULL;
|
|
queue[id].start = clock();
|
|
|
|
/* printf("%s\n", queue[id].request); */
|
|
|
|
pthread_mutex_unlock(&queue_mutex);
|
|
|
|
return id;
|
|
}
|
|
|
|
void send_any_enqueued_requests() {
|
|
pthread_mutex_lock(&queue_mutex);
|
|
|
|
if (con == NULL) goto done;
|
|
|
|
for (request_id id = 0; id < REQUEST_RESPONSE_QUEUE_SIZE; id++) {
|
|
if (queue[id].state == SEND_REQUEST) {
|
|
char *request = queue[id].request;
|
|
|
|
wby_frame_begin(con, WBY_WSOP_TEXT_FRAME);
|
|
wby_write(con, request, strlen(request));
|
|
wby_frame_end(con);
|
|
|
|
queue[id].state = RECEIVE_RESPONSE;
|
|
free(request);
|
|
queue[id].request = NULL;
|
|
}
|
|
}
|
|
|
|
done:
|
|
pthread_mutex_unlock(&queue_mutex);
|
|
}
|
|
|
|
static cJSON *await_response(request_id id) {
|
|
pthread_mutex_lock(&queue_mutex);
|
|
|
|
while (queue[id].state != HANDLE_RESPONSE) {
|
|
pthread_cond_wait(&queue_cv, &queue_mutex);
|
|
}
|
|
|
|
cJSON *resp = queue[id].response;
|
|
queue[id].state = EMPTY;
|
|
queue[id].response = NULL;
|
|
|
|
/* printf("Elapsed: %f seconds\n", (double)(clock() - queue[id].start) / CLOCKS_PER_SEC); */
|
|
|
|
pthread_mutex_unlock(&queue_mutex);
|
|
|
|
return resp;
|
|
}
|
|
|
|
#define MAKE_REQ(op, req_body, resp_handler) \
|
|
do { \
|
|
int ret = -1; \
|
|
cJSON *req = NULL; \
|
|
cJSON *resp = NULL; \
|
|
\
|
|
pthread_mutex_lock(&queue_mutex); \
|
|
int disconnected = (con == NULL); \
|
|
pthread_mutex_unlock(&queue_mutex); \
|
|
if (disconnected) { ret = -EIO; goto done; } \
|
|
\
|
|
req = cJSON_CreateObject(); \
|
|
cJSON_AddStringToObject(req, "op", op); \
|
|
req_body \
|
|
\
|
|
request_id id = enqueue_request(req); \
|
|
resp = await_response(id); \
|
|
\
|
|
cJSON *error_item = cJSON_GetObjectItemCaseSensitive(resp, "error"); \
|
|
if (error_item) { \
|
|
ret = -error_item->valueint; \
|
|
if (ret != 0) goto done; \
|
|
} \
|
|
\
|
|
ret = -1; \
|
|
resp_handler \
|
|
\
|
|
done: \
|
|
if (req != NULL) cJSON_Delete(req); \
|
|
if (resp != NULL) cJSON_Delete(resp); \
|
|
return ret; \
|
|
} while (0)
|
|
|
|
#define JSON_GET_PROP_INT(lvalue, key) \
|
|
do { \
|
|
lvalue = cJSON_GetObjectItemCaseSensitive(resp, key)->valueint; \
|
|
} while (0)
|
|
|
|
static int
|
|
hello_getattr(const char *path, struct stat *stbuf)
|
|
{
|
|
memset(stbuf, 0, sizeof(struct stat));
|
|
|
|
MAKE_REQ("getattr", {
|
|
cJSON_AddStringToObject(req, "path", path);
|
|
}, {
|
|
JSON_GET_PROP_INT(stbuf->st_mode, "st_mode");
|
|
JSON_GET_PROP_INT(stbuf->st_nlink, "st_nlink");
|
|
JSON_GET_PROP_INT(stbuf->st_size, "st_size");
|
|
|
|
ret = 0;
|
|
});
|
|
}
|
|
|
|
static int
|
|
hello_open(const char *path, struct fuse_file_info *fi)
|
|
{
|
|
MAKE_REQ("open", {
|
|
cJSON_AddStringToObject(req, "path", path);
|
|
cJSON_AddNumberToObject(req, "flags", fi->flags);
|
|
}, {
|
|
cJSON *fh_item = cJSON_GetObjectItemCaseSensitive(resp, "fh");
|
|
if (fh_item) fi->fh = fh_item->valueint;
|
|
|
|
ret = 0;
|
|
});
|
|
}
|
|
|
|
static int
|
|
hello_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
|
|
off_t offset, struct fuse_file_info *fi)
|
|
{
|
|
// send {op: "readdir", path} to the websocket handler
|
|
MAKE_REQ("readdir", {
|
|
cJSON_AddStringToObject(req, "path", path);
|
|
}, {
|
|
cJSON *entries = cJSON_GetObjectItemCaseSensitive(resp, "entries");
|
|
cJSON *entry;
|
|
cJSON_ArrayForEach(entry, entries) {
|
|
filler(buf, cJSON_GetStringValue(entry), NULL, 0);
|
|
}
|
|
|
|
ret = 0;
|
|
});
|
|
}
|
|
|
|
static int
|
|
hello_read(const char *path, char *buf, size_t size, off_t offset,
|
|
struct fuse_file_info *fi)
|
|
{
|
|
MAKE_REQ("read", {
|
|
cJSON_AddStringToObject(req, "path", path);
|
|
cJSON_AddNumberToObject(req, "size", size);
|
|
cJSON_AddNumberToObject(req, "offset", offset);
|
|
|
|
cJSON_AddNumberToObject(req, "fh", fi->fh);
|
|
cJSON_AddNumberToObject(req, "flags", fi->flags);
|
|
}, {
|
|
size_t resp_size;
|
|
JSON_GET_PROP_INT(resp_size, "size");
|
|
size = resp_size < size ? resp_size : size;
|
|
|
|
cJSON *resp_buf_item = cJSON_GetObjectItemCaseSensitive(resp, "buf");
|
|
char *resp_buf = cJSON_GetStringValue(resp_buf_item);
|
|
size_t resp_buf_len = strlen(resp_buf);
|
|
size = resp_buf_len < size ? resp_buf_len : size;
|
|
|
|
memcpy(buf, resp_buf, size);
|
|
|
|
ret = size;
|
|
});
|
|
}
|
|
|
|
static int hello_release(const char *path, struct fuse_file_info *fi) {
|
|
MAKE_REQ("release", {
|
|
cJSON_AddStringToObject(req, "path", path);
|
|
cJSON_AddNumberToObject(req, "fh", fi->fh);
|
|
}, {
|
|
ret = 0;
|
|
});
|
|
}
|
|
|
|
static struct fuse_operations hello_filesystem_operations = {
|
|
.getattr = hello_getattr, /* To provide size, permissions, etc. */
|
|
.open = hello_open, /* To enforce read-only access. */
|
|
.read = hello_read, /* To provide file content. */
|
|
.release = hello_release,
|
|
.readdir = hello_readdir, /* To provide directory listing. */
|
|
};
|
|
|
|
static int
|
|
dispatch(struct wby_con *connection, void *userdata)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
websocket_connect(struct wby_con *connection, void *userdata)
|
|
{
|
|
/* connection bound userdata */
|
|
connection->user_data = NULL;
|
|
if (0 == strcmp(connection->request.uri, "/"))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
websocket_connected(struct wby_con *connection, void *userdata)
|
|
{
|
|
printf("WebSocket connected\n");
|
|
con = connection;
|
|
}
|
|
|
|
static int
|
|
websocket_frame(struct wby_con *connection, const struct wby_frame *frame, void *userdata)
|
|
{
|
|
unsigned char data[131072] = {0};
|
|
|
|
int i = 0;
|
|
/* printf("WebSocket frame incoming\n"); */
|
|
/* printf(" Frame OpCode: %d\n", frame->opcode); */
|
|
/* printf(" Final frame?: %s\n", (frame->flags & WBY_WSF_FIN) ? "yes" : "no"); */
|
|
/* printf(" Masked? : %s\n", (frame->flags & WBY_WSF_MASKED) ? "yes" : "no"); */
|
|
/* printf(" Data Length : %d\n", (int) frame->payload_length); */
|
|
|
|
if ((unsigned long) frame->payload_length > sizeof(data)) {
|
|
printf("Data too long!\n");
|
|
exit(1);
|
|
}
|
|
|
|
while (i < frame->payload_length) {
|
|
unsigned char buffer[16];
|
|
int remain = frame->payload_length - i;
|
|
size_t read_size = remain > (int) sizeof buffer ? sizeof buffer : (size_t) remain;
|
|
size_t k;
|
|
|
|
/* printf("%08x ", (int) i); */
|
|
if (0 != wby_read(connection, buffer, read_size))
|
|
break;
|
|
/* for (k = 0; k < read_size; ++k) */
|
|
/* printf("%02x ", buffer[k]); */
|
|
/* for (k = read_size; k < 16; ++k) */
|
|
/* printf(" "); */
|
|
/* printf(" | "); */
|
|
/* for (k = 0; k < read_size; ++k) */
|
|
/* printf("%c", isprint(buffer[k]) ? buffer[k] : '?'); */
|
|
/* printf("\n"); */
|
|
for (k = 0; k < read_size; ++k)
|
|
data[i + k] = buffer[k];
|
|
i += (int)read_size;
|
|
}
|
|
|
|
if ((int) strlen((const char *) data) != frame->payload_length) {
|
|
printf("Null in data! [%s]\n", data);
|
|
}
|
|
|
|
// Will be freed at the receiver end.
|
|
cJSON *resp = cJSON_Parse((const char *) data);
|
|
|
|
cJSON *id_item = cJSON_GetObjectItemCaseSensitive(resp, "id");
|
|
if (id_item == NULL) {
|
|
printf("No id in response!\n");
|
|
exit(1);
|
|
}
|
|
request_id id = id_item->valueint;
|
|
|
|
pthread_mutex_lock(&queue_mutex);
|
|
|
|
if (queue[id].state != RECEIVE_RESPONSE) {
|
|
printf("Got response to request in wrong state!\n");
|
|
exit(1);
|
|
}
|
|
queue[id].state = HANDLE_RESPONSE;
|
|
queue[id].response = resp;
|
|
|
|
pthread_cond_signal(&queue_cv);
|
|
pthread_mutex_unlock(&queue_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
websocket_closed(struct wby_con *connection, void *userdata)
|
|
{
|
|
printf("WebSocket closed\n");
|
|
con = NULL;
|
|
}
|
|
|
|
static void
|
|
test_log(const char* text)
|
|
{
|
|
/* printf("[debug] %s\n", text); */
|
|
}
|
|
|
|
void *websocket_main(void *threadid)
|
|
{
|
|
void *memory = NULL;
|
|
wby_size needed_memory = 0;
|
|
|
|
struct wby_config config;
|
|
memset(&config, 0, sizeof config);
|
|
config.userdata = NULL;
|
|
config.address = "127.0.0.1";
|
|
config.port = 8888;
|
|
config.connection_max = 4;
|
|
config.request_buffer_size = 2048;
|
|
config.io_buffer_size = 8192;
|
|
config.log = test_log;
|
|
config.dispatch = dispatch;
|
|
config.ws_connect = websocket_connect;
|
|
config.ws_connected = websocket_connected;
|
|
config.ws_frame = websocket_frame;
|
|
config.ws_closed = websocket_closed;
|
|
|
|
wby_init(&server, &config, &needed_memory);
|
|
memory = calloc(needed_memory, 1);
|
|
wby_start(&server, memory);
|
|
|
|
printf("Awaiting WebSocket connection from Chrome extension.\n");
|
|
for (;;) {
|
|
send_any_enqueued_requests();
|
|
|
|
wby_update(&server);
|
|
}
|
|
|
|
wby_stop(&server);
|
|
free(memory);
|
|
#if defined(_WIN32)
|
|
WSACleanup();
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
pthread_t websocket_thread;
|
|
pthread_create(&websocket_thread, NULL, websocket_main, NULL);
|
|
return fuse_main(argc, argv, &hello_filesystem_operations, NULL);
|
|
|
|
}
|