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falk-werner_webfuse-provider/lib/webfuse/provider/impl/operation/read.c
Falk Werner fa78e23533
feat(webfuse): static file provider (#30)
* added API stub of static_filesystem

* added callback functions

* added basic directory listing

* resize filesystem if necessary

* added path stub

* adds imlementation and tests of path

* adds mock of wpf_request

* adds test implementation and some matchers

* added matcher of readdir results

* fixes default directory test

* adds implementation of static_filesystem_add and add_text

* added implementation of read

* adds implementation of filesystem_read

* corrects naming of some functions

* removes Flawfinder comments, since Flawfinder is disabled
2019-04-26 20:49:09 +02:00

85 lines
2.6 KiB
C

#include "webfuse/provider/impl/operation/read.h"
#include <stdlib.h>
#include <libwebsockets.h>
#include "webfuse/provider/impl/operation/error.h"
#include "webfuse/provider/impl/request.h"
#include "webfuse/core/util.h"
void wfp_impl_read(
struct wfp_impl_invokation_context * context,
json_t * params,
int id)
{
size_t const count = json_array_size(params);
if (5 == count)
{
json_t * inode_holder = json_array_get(params, 1);
json_t * handle_holder = json_array_get(params, 2);
json_t * offset_holder = json_array_get(params, 3);
json_t * length_holder = json_array_get(params, 4);
if (json_is_integer(inode_holder) &&
json_is_integer(handle_holder) &&
json_is_integer(offset_holder) &&
json_is_integer(length_holder))
{
ino_t inode = (ino_t) json_integer_value(inode_holder);
int handle = json_integer_value(handle_holder);
size_t offset = json_integer_value(offset_holder);
size_t length = json_integer_value(length_holder);
struct wfp_request * request = wfp_impl_request_create(context->request, id);
context->provider->read(request, inode, handle, offset, length, context->user_data);
}
}
}
void wfp_impl_read_default(
struct wfp_request * request,
ino_t WF_UNUSED_PARAM(inode),
uint32_t WF_UNUSED_PARAM(handle),
size_t WF_UNUSED_PARAM(offset),
size_t WF_UNUSED_PARAM(length),
void * WF_UNUSED_PARAM(user_data))
{
wfp_impl_respond_error(request, WF_BAD_NOENTRY);
}
void wfp_impl_respond_read(
struct wfp_request * request,
char const * data,
size_t length)
{
if (0 < length)
{
size_t const size = 4 * ((length / 3) + 2);
char * buffer = malloc(size);
if (NULL != buffer)
{
lws_b64_encode_string(data, length, buffer, size);
json_t * result = json_object();
json_object_set_new(result, "data", json_string(buffer));
json_object_set_new(result, "format", json_string("base64"));
json_object_set_new(result, "count", json_integer((int) length));
wfp_impl_respond(request, result);
free(buffer);
}
else
{
wfp_impl_respond_error(request, WF_BAD);
}
}
else
{
json_t * result = json_object();
json_object_set_new(result, "data", json_string(""));
json_object_set_new(result, "format", json_string("identitiy"));
json_object_set_new(result, "count", json_integer(0));
wfp_impl_respond(request, result);
}
}