mirror of
https://github.com/falk-werner/webfuse
synced 2024-10-27 20:34:10 +00:00
98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
#include "wsfs/operations.h"
|
|
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <limits.h>
|
|
#include <jansson.h>
|
|
#include <libwebsockets.h>
|
|
|
|
#include "wsfs/jsonrpc/server.h"
|
|
|
|
#define WSFS_MAX_READ_LENGTH 4096
|
|
|
|
static wsfs_status wsfs_fill_buffer(
|
|
char * buffer,
|
|
size_t buffer_size,
|
|
char const * format,
|
|
char const * data,
|
|
size_t count)
|
|
{
|
|
wsfs_status status = WSFS_GOOD;
|
|
|
|
size_t const copy_count = (buffer_size < count) ? buffer_size : count;
|
|
if (0 < copy_count)
|
|
{
|
|
if (0 == strcmp("identity", format))
|
|
{
|
|
memcpy(buffer, data, copy_count);
|
|
}
|
|
else if (0 == strcmp("base64", format))
|
|
{
|
|
lws_b64_decode_string(data, buffer, copy_count);
|
|
}
|
|
else
|
|
{
|
|
status = WSFS_BAD;
|
|
}
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static void wsfs_operation_read_finished(void * user_data, wsfs_status status, json_t const * data)
|
|
{
|
|
fuse_req_t request = user_data;
|
|
|
|
char * buffer = NULL;
|
|
size_t length = 0;
|
|
if (NULL != data)
|
|
{
|
|
json_t * data_holder = json_object_get(data, "data");
|
|
json_t * format_holder = json_object_get(data, "format");
|
|
json_t * count_holder = json_object_get(data, "count");
|
|
|
|
if ((NULL != data_holder) && (json_is_string(data_holder)) &&
|
|
(NULL != format_holder) && (json_is_string(format_holder)) &&
|
|
(NULL != count_holder) && (json_is_integer(count_holder)))
|
|
{
|
|
char const * const data = json_string_value(data_holder);
|
|
char const * const format = json_string_value(format_holder);
|
|
length = (size_t) json_integer_value(count_holder);
|
|
buffer = malloc(length);
|
|
|
|
status = wsfs_fill_buffer(buffer, length, format, data, length);
|
|
}
|
|
else
|
|
{
|
|
status = WSFS_BAD_FORMAT;
|
|
}
|
|
}
|
|
|
|
if (WSFS_GOOD == status)
|
|
{
|
|
fuse_reply_buf(request, buffer, length);
|
|
}
|
|
else
|
|
{
|
|
fuse_reply_err(request, ENOENT);
|
|
}
|
|
|
|
free(buffer);
|
|
|
|
}
|
|
|
|
void wsfs_operation_read(
|
|
fuse_req_t request,
|
|
fuse_ino_t inode,
|
|
size_t size,
|
|
off_t offset,
|
|
struct fuse_file_info * file_info)
|
|
{
|
|
struct wsfs_operations_context * user_data = fuse_req_userdata(request);
|
|
struct wsfs_jsonrpc_server * rpc = user_data->rpc;
|
|
|
|
int const length = (size <= WSFS_MAX_READ_LENGTH) ? (int) size : WSFS_MAX_READ_LENGTH;
|
|
int handle = (file_info->fh & INT_MAX);
|
|
wsfs_jsonrpc_server_invoke(rpc, &wsfs_operation_read_finished, request, "read", "iiii", inode, handle, (int) offset, length);
|
|
}
|