mirror of
https://github.com/WinampDesktop/winamp.git
synced 2024-12-19 00:45:53 +01:00
749 lines
18 KiB
C++
749 lines
18 KiB
C++
#include "NXFileObject.h"
|
|
#include "nu/ProgressTracker.h"
|
|
#include "nx/nxthread.h"
|
|
#include "nx/nxsleep.h"
|
|
#include "jnetlib/jnetlib.h"
|
|
#include "../nswasabi/AutoCharNX.h"
|
|
#include "nswasabi/ReferenceCounted.h"
|
|
#include "nu/MessageLoop.h"
|
|
#include <time.h>
|
|
#include <new>
|
|
#include "../../../WAT/WAT.h"
|
|
|
|
/* TODO: benski> test this with a server that does not return content-length. I bet we could get it to work */
|
|
|
|
/* TODO: benski> on windows, we can use a single CreateFile HANDLE for both reading and writing
|
|
and use ReadFile(..., &overlapped) to maintain two separate file pointers
|
|
this should improve performance as they will share the same cache
|
|
_might_ have to use async I/O to get it to work (but use it synchronously by waiting on the handle after making the call
|
|
*/
|
|
|
|
#define HTTP_BUFFER_SIZE 65536
|
|
|
|
class NXFileObject_ProgressiveDownloader;
|
|
|
|
enum
|
|
{
|
|
MESSAGE_KILL,
|
|
MESSAGE_SEEK,
|
|
MESSAGE_SIZE,
|
|
MESSAGE_ERROR,
|
|
MESSAGE_CLOSED,
|
|
MESSAGE_CONNECTED,
|
|
};
|
|
|
|
char MessageString[6][10] =
|
|
{
|
|
"Kill",
|
|
"Seek",
|
|
"Size",
|
|
"Error",
|
|
"Closed",
|
|
"Connected"
|
|
};
|
|
|
|
|
|
struct seek_message_t : public nu::message_node_t
|
|
{
|
|
uint64_t start;
|
|
uint64_t end;
|
|
};
|
|
|
|
struct size_message_t : public nu::message_node_t
|
|
{
|
|
uint64_t size;
|
|
};
|
|
|
|
struct error_message_t : public nu::message_node_t
|
|
{
|
|
int error_code;
|
|
};
|
|
|
|
/* This class represents the thread that's actually downloading the content from the server */
|
|
class ProgressiveDownload
|
|
{
|
|
public:
|
|
ProgressiveDownload(ProgressTracker &progress_tracker, NXFileObject_ProgressiveDownloader &parent);
|
|
~ProgressiveDownload();
|
|
ns_error_t Initialize(nx_uri_t uri, jnl_http_t http, const char *user_agent, nx_uri_t temp_uri);
|
|
|
|
void Seek(uint64_t start, uint64_t end);
|
|
void Close();
|
|
private:
|
|
/* These functions are called on the local thread */
|
|
/* These functions run on the download thread */
|
|
static nx_thread_return_t NXTHREADCALL _ProgressiveThread(nx_thread_parameter_t param) { return ((ProgressiveDownload *)param)->ProgressiveThread(); }
|
|
nx_thread_return_t NXTHREADCALL ProgressiveThread();
|
|
int Connect();
|
|
void Internal_Write(const void *data, size_t data_len);
|
|
int Wait(int milliseconds);
|
|
ns_error_t SetupConnection(uint64_t start_position, uint64_t end_position);
|
|
int DoRead(void *buffer, size_t bufferlen);
|
|
void ProcessMessage(nu::message_node_t *message);
|
|
private:
|
|
ProgressTracker &progress_tracker;
|
|
NXFileObject_ProgressiveDownloader &parent;
|
|
|
|
nx_uri_t temp_filename, url;
|
|
FILE *progressive_file_write;
|
|
jnl_http_t http;
|
|
char *user_agent;
|
|
nx_thread_t download_thread;
|
|
nu::MessageLoop message_loop;
|
|
uint64_t file_size;
|
|
int killswitch;
|
|
};
|
|
|
|
class NXFileObject_ProgressiveDownloader: public NXFileObject
|
|
{
|
|
public:
|
|
NXFileObject_ProgressiveDownloader();
|
|
~NXFileObject_ProgressiveDownloader();
|
|
ns_error_t Initialize(nx_uri_t uri, jnl_http_t http, const char *user_agent);
|
|
|
|
bool Available(uint64_t size, uint64_t *available);
|
|
|
|
/* API used by ProgressiveDownload */
|
|
void OnFileSize(uint64_t filesize);
|
|
void OnConnected();
|
|
void OnError(int error_code);
|
|
void OnClosed();
|
|
private:
|
|
/* NXFileObject implementation */
|
|
ns_error_t Read(void *buffer, size_t bytes_requested, size_t *bytes_read);
|
|
ns_error_t Write(const void *buffer, size_t bytes);
|
|
ns_error_t Seek(uint64_t position);
|
|
ns_error_t Tell(uint64_t *position);
|
|
ns_error_t PeekByte(uint8_t *byte);
|
|
ns_error_t Sync();
|
|
ns_error_t Truncate();
|
|
|
|
bool WaitForRead(uint64_t size);
|
|
void ProcessMessage(nu::message_node_t *message);
|
|
void Wait(unsigned int milliseconds);
|
|
|
|
ProgressiveDownload download;
|
|
ProgressTracker progress_tracker;
|
|
FILE *progressive_file_read;
|
|
bool end_of_file;
|
|
bool connected;
|
|
int error_code;
|
|
nu::MessageLoop message_loop;
|
|
bool closed;
|
|
bool need_seek; // if set to true, we need to fseek(position)
|
|
};
|
|
|
|
ProgressiveDownload::ProgressiveDownload(ProgressTracker &progress_tracker, NXFileObject_ProgressiveDownloader &parent) : progress_tracker(progress_tracker), parent(parent)
|
|
{
|
|
killswitch=0;
|
|
url=0;
|
|
temp_filename=0;
|
|
progressive_file_write=0;
|
|
http=0;
|
|
user_agent=0;
|
|
download_thread=0;
|
|
file_size=0;
|
|
}
|
|
|
|
ProgressiveDownload::~ProgressiveDownload()
|
|
{
|
|
if (download_thread)
|
|
{
|
|
Close();
|
|
NXThreadJoin(download_thread, 0);
|
|
}
|
|
|
|
// TODO: flush messages
|
|
if (progressive_file_write)
|
|
fclose(progressive_file_write);
|
|
NXURIRelease(temp_filename);
|
|
NXURIRelease(url);
|
|
if (http)
|
|
jnl_http_release(http);
|
|
free(user_agent);
|
|
}
|
|
|
|
void ProgressiveDownload::Close()
|
|
{
|
|
nu::message_node_t *message = message_loop.AllocateMessage();
|
|
message->message = MESSAGE_KILL;
|
|
message_loop.PostMessage(message);
|
|
}
|
|
|
|
void ProgressiveDownload::Seek(uint64_t start, uint64_t end)
|
|
{
|
|
seek_message_t *message = (seek_message_t *)message_loop.AllocateMessage();
|
|
message->message = MESSAGE_SEEK;
|
|
message->start = start;
|
|
message->end = end;
|
|
message_loop.PostMessage(message);
|
|
}
|
|
|
|
ns_error_t ProgressiveDownload::Initialize(nx_uri_t url, jnl_http_t http, const char *user_agent, nx_uri_t temp_filename)
|
|
{
|
|
this->url = NXURIRetain(url);
|
|
this->temp_filename = NXURIRetain(temp_filename);
|
|
if (user_agent)
|
|
this->user_agent = strdup(user_agent);
|
|
this->http = jnl_http_retain(http);
|
|
progressive_file_write = NXFile_fopen(temp_filename, nx_file_FILE_readwrite_binary);
|
|
if (progressive_file_write == 0)
|
|
return NErr_FailedCreate;
|
|
|
|
return NXThreadCreate(&download_thread, _ProgressiveThread, this);
|
|
}
|
|
|
|
void ProgressiveDownload::ProcessMessage(nu::message_node_t *message)
|
|
{
|
|
switch(message->message)
|
|
{
|
|
case MESSAGE_KILL:
|
|
killswitch=1;
|
|
break;
|
|
case MESSAGE_SEEK:
|
|
{
|
|
seek_message_t *seek_message = (seek_message_t *)message;
|
|
|
|
char buffer[HTTP_BUFFER_SIZE] = {0};
|
|
|
|
/* empty out the jnetlib buffer. that might let us be able to avoid this seek */
|
|
DoRead(buffer, sizeof(buffer));
|
|
|
|
uint64_t new_start, new_end;
|
|
if (!progress_tracker.Valid(seek_message->start, seek_message->end) /* double check that we actually need to seek */
|
|
&& !progress_tracker.Seek(seek_message->start, seek_message->end, &new_start, &new_end))
|
|
{
|
|
int ret = SetupConnection(new_start, new_end);
|
|
if (ret == NErr_Success)
|
|
ret = Connect();
|
|
if (ret != NErr_Success)
|
|
{
|
|
parent.OnError(ret);
|
|
killswitch=1;
|
|
break;
|
|
}
|
|
|
|
_fseeki64(progressive_file_write, new_start, SEEK_SET);
|
|
}
|
|
else
|
|
parent.OnConnected();
|
|
}
|
|
break;
|
|
}
|
|
|
|
message_loop.FreeMessage(message);
|
|
}
|
|
|
|
int ProgressiveDownload::Wait(int milliseconds)
|
|
{
|
|
for (;;)
|
|
{
|
|
if (killswitch)
|
|
return 1;
|
|
|
|
nu::message_node_t *message = message_loop.PeekMessage(milliseconds);
|
|
if (message)
|
|
ProcessMessage(message);
|
|
else
|
|
break;
|
|
}
|
|
|
|
nu::message_node_t *message = message_loop.PeekMessage(milliseconds);
|
|
if (message)
|
|
ProcessMessage(message);
|
|
|
|
return killswitch;
|
|
}
|
|
|
|
ns_error_t ProgressiveDownload::SetupConnection(uint64_t start_position, uint64_t end_position)
|
|
{
|
|
if (!http)
|
|
http = jnl_http_create(HTTP_BUFFER_SIZE, 0);
|
|
|
|
if (!http)
|
|
return NErr_FailedCreate;
|
|
|
|
jnl_http_reset_headers(http);
|
|
if (user_agent)
|
|
jnl_http_addheadervalue(http, "User-Agent", user_agent);
|
|
|
|
if (start_position && start_position != (uint64_t)-1)
|
|
{
|
|
if (end_position == (uint64_t)-1)
|
|
{
|
|
char temp[128] = {0};
|
|
sprintf(temp, "Range: bytes=%llu-", start_position);
|
|
jnl_http_addheader(http, temp);
|
|
}
|
|
else
|
|
{
|
|
char temp[128] = {0};
|
|
sprintf(temp, "Range: bytes=%llu-%llu", start_position, end_position);
|
|
jnl_http_addheader(http, temp);
|
|
}
|
|
}
|
|
|
|
jnl_http_addheader(http, "Connection: Close"); // TODO: change if we ever want a persistent connection and downloading in chunks
|
|
jnl_http_connect(http, AutoCharUTF8(url), 1, "GET");
|
|
|
|
return NErr_Success;
|
|
}
|
|
|
|
int ProgressiveDownload::Connect()
|
|
{
|
|
// TODO: configurable timeout
|
|
/* wait for connection */
|
|
#ifdef _DEBUG
|
|
const int timeout = 15000;
|
|
#else
|
|
const int timeout = 15;
|
|
#endif
|
|
time_t start_time = time(0);
|
|
|
|
int http_status = jnl_http_get_status(http);
|
|
while (http_status == HTTPGET_STATUS_CONNECTING || http_status == HTTPGET_STATUS_READING_HEADERS)
|
|
{
|
|
if (Wait(55) != 0)
|
|
return NErr_Interrupted;
|
|
|
|
int ret = jnl_http_run(http);
|
|
if (ret == HTTPGET_RUN_ERROR)
|
|
return NErr_ConnectionFailed;
|
|
if (start_time + timeout < time(0))
|
|
return NErr_TimedOut;
|
|
|
|
http_status = jnl_http_get_status(http);
|
|
}
|
|
|
|
if (http_status == HTTPGET_STATUS_ERROR)
|
|
{
|
|
switch(jnl_http_getreplycode(http))
|
|
{
|
|
case 400:
|
|
return NErr_BadRequest;
|
|
case 401:
|
|
// TODO: deal with this specially
|
|
return NErr_Unauthorized;
|
|
case 403:
|
|
// TODO: deal with this specially?
|
|
return NErr_Forbidden;
|
|
case 404:
|
|
return NErr_NotFound;
|
|
case 405:
|
|
return NErr_BadMethod;
|
|
case 406:
|
|
return NErr_NotAcceptable;
|
|
case 407:
|
|
// TODO: deal with this specially
|
|
return NErr_ProxyAuthenticationRequired;
|
|
case 408:
|
|
return NErr_RequestTimeout;
|
|
case 409:
|
|
return NErr_Conflict;
|
|
case 410:
|
|
return NErr_Gone;
|
|
case 500:
|
|
return NErr_InternalServerError;
|
|
case 503:
|
|
return NErr_ServiceUnavailable;
|
|
default:
|
|
return NErr_ConnectionFailed;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!file_size)
|
|
{
|
|
// TODO: check range header for actual size
|
|
file_size = jnl_http_content_length(http);
|
|
parent.OnFileSize(file_size);
|
|
}
|
|
parent.OnConnected();
|
|
return NErr_Success;
|
|
}
|
|
}
|
|
|
|
void ProgressiveDownload::Internal_Write(const void *data, size_t data_len)
|
|
{
|
|
size_t bytes_written = fwrite(data, 1, data_len, progressive_file_write);
|
|
fflush(progressive_file_write);
|
|
progress_tracker.Write(bytes_written);
|
|
}
|
|
|
|
int ProgressiveDownload::DoRead(void *buffer, size_t bufferlen)
|
|
{
|
|
int ret = jnl_http_run(http);
|
|
size_t bytes_received;
|
|
do
|
|
{
|
|
ret = jnl_http_run(http);
|
|
bytes_received = jnl_http_get_bytes(http, buffer, bufferlen);
|
|
if (bytes_received)
|
|
{
|
|
Internal_Write(buffer, bytes_received);
|
|
}
|
|
/* TODO: benski> should we limit the number of times through this loop?
|
|
I'm worried that if data comes in fast enough we might get stuck in this for a long time */
|
|
} while (bytes_received == bufferlen);
|
|
return ret;
|
|
}
|
|
|
|
nx_thread_return_t ProgressiveDownload::ProgressiveThread()
|
|
{
|
|
ns_error_t ret;
|
|
|
|
if (!http)
|
|
{
|
|
ret = SetupConnection(0, (uint64_t)-1);
|
|
if (ret != NErr_Success)
|
|
{
|
|
parent.OnError(ret);
|
|
parent.OnClosed();
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
|
|
ret = Connect();
|
|
if (ret != NErr_Success)
|
|
{
|
|
parent.OnError(ret);
|
|
}
|
|
else
|
|
{
|
|
for (;;)
|
|
{
|
|
if (Wait(10) == 1)
|
|
break; // killed!
|
|
|
|
char buffer[HTTP_BUFFER_SIZE] = {0};
|
|
int ret = DoRead(buffer, sizeof(buffer));
|
|
if (ret == -1)
|
|
break;
|
|
else if (ret == HTTPGET_RUN_CONNECTION_CLOSED)
|
|
{
|
|
if (jnl_http_bytes_available(http) == 0)
|
|
{
|
|
if (progress_tracker.Valid(0, file_size))
|
|
{
|
|
// file is completely downloaded. let's gtfo
|
|
fclose(progressive_file_write);
|
|
progressive_file_write=0;
|
|
break;
|
|
}
|
|
|
|
// if we're not completely full then we need to sit around for a potential MESSAGE_SEEK
|
|
//while (Wait(100) == 0)
|
|
{
|
|
// nop
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
parent.OnClosed();
|
|
return 0;
|
|
}
|
|
|
|
/* ------------------ */
|
|
NXFileObject_ProgressiveDownloader::NXFileObject_ProgressiveDownloader() : download(progress_tracker, *this)
|
|
{
|
|
progressive_file_read=0;
|
|
end_of_file=false;
|
|
connected=false;
|
|
error_code=NErr_Success;
|
|
closed = false;
|
|
need_seek=false;
|
|
position=0;
|
|
}
|
|
|
|
|
|
|
|
NXFileObject_ProgressiveDownloader::~NXFileObject_ProgressiveDownloader()
|
|
{
|
|
download.Close();
|
|
while (!closed)
|
|
Wait(10);
|
|
if (progressive_file_read)
|
|
fclose(progressive_file_read);
|
|
}
|
|
|
|
void NXFileObject_ProgressiveDownloader::OnConnected()
|
|
{
|
|
nu::message_node_t *message = message_loop.AllocateMessage();
|
|
message->message = MESSAGE_CONNECTED;
|
|
message_loop.PostMessage(message);
|
|
}
|
|
|
|
void NXFileObject_ProgressiveDownloader::OnError(int error_code)
|
|
{
|
|
error_message_t *message = (error_message_t *)message_loop.AllocateMessage();
|
|
message->message = MESSAGE_ERROR;
|
|
message->error_code = error_code;
|
|
message_loop.PostMessage(message);
|
|
}
|
|
|
|
void NXFileObject_ProgressiveDownloader::OnFileSize(uint64_t size)
|
|
{
|
|
size_message_t *message = (size_message_t *)message_loop.AllocateMessage();
|
|
message->message = MESSAGE_SIZE;
|
|
message->size = size;
|
|
message_loop.PostMessage(message);
|
|
}
|
|
|
|
void NXFileObject_ProgressiveDownloader::OnClosed()
|
|
{
|
|
nu::message_node_t *message = message_loop.AllocateMessage();
|
|
message->message = MESSAGE_CLOSED;
|
|
message_loop.PostMessage(message);
|
|
}
|
|
|
|
ns_error_t NXFileObject_ProgressiveDownloader::Initialize(nx_uri_t uri, jnl_http_t http, const char *user_agent)
|
|
{
|
|
ReferenceCountedNXURI temp_uri;
|
|
NXURICreateTemp(&temp_uri);
|
|
ns_error_t ret = download.Initialize(uri, http, user_agent, temp_uri);
|
|
if (ret != NErr_Success)
|
|
{
|
|
closed=true;
|
|
return ret;
|
|
}
|
|
|
|
progressive_file_read = NXFile_fopen(temp_uri, nx_file_FILE_read_binary);
|
|
|
|
for (;;)
|
|
{
|
|
Wait(10);
|
|
if (error_code != NErr_Success)
|
|
return error_code;
|
|
|
|
if (connected)
|
|
break;
|
|
}
|
|
return NErr_Success;
|
|
}
|
|
|
|
void NXFileObject_ProgressiveDownloader::ProcessMessage(nu::message_node_t *message)
|
|
{
|
|
switch(message->message)
|
|
{
|
|
case MESSAGE_ERROR:
|
|
{
|
|
error_message_t *seek_message = (error_message_t *)message;
|
|
error_code = seek_message->error_code;
|
|
}
|
|
break;
|
|
case MESSAGE_CONNECTED:
|
|
connected = true;
|
|
break;
|
|
case MESSAGE_SIZE:
|
|
{
|
|
size_message_t *seek_message = (size_message_t *)message;
|
|
region.end = seek_message->size;
|
|
}
|
|
break;
|
|
case MESSAGE_CLOSED:
|
|
closed=true;
|
|
break;
|
|
}
|
|
|
|
message_loop.FreeMessage(message);
|
|
}
|
|
|
|
void NXFileObject_ProgressiveDownloader::Wait(unsigned int milliseconds)
|
|
{
|
|
for (;;)
|
|
{
|
|
nu::message_node_t *message = message_loop.PeekMessage(milliseconds);
|
|
if (message)
|
|
ProcessMessage(message);
|
|
else
|
|
break;
|
|
}
|
|
|
|
nu::message_node_t *message = message_loop.PeekMessage(milliseconds);
|
|
if (message)
|
|
ProcessMessage(message);
|
|
}
|
|
|
|
bool NXFileObject_ProgressiveDownloader::WaitForRead(uint64_t size)
|
|
{
|
|
if (progress_tracker.Valid(position, position+size))
|
|
return true;
|
|
|
|
if (need_seek)
|
|
{
|
|
// give it just a little bit of time to avoid constant reseeks when the download thread is just barely keeping up
|
|
Wait(10);
|
|
if (progress_tracker.Valid(position, position+size))
|
|
return true;
|
|
|
|
connected=false;
|
|
error_code=NErr_Success;
|
|
download.Seek(position, (uint64_t)position+size);
|
|
|
|
for (;;)
|
|
{
|
|
Wait(10);
|
|
if (error_code != NErr_Success)
|
|
return false;
|
|
|
|
if (connected)
|
|
break;
|
|
}
|
|
}
|
|
|
|
while (!progress_tracker.Valid(position, position+size))
|
|
{
|
|
Wait(10);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
ns_error_t NXFileObject_ProgressiveDownloader::Read(void *buffer, size_t bytes_requested, size_t *bytes_read)
|
|
{
|
|
if (end_of_file || position >= (region.end - region.start))
|
|
return NErr_EndOfFile;
|
|
|
|
// don't allow a read past the end of the file as this will confuse progress_tracker (which doesn't know/care about the file length)
|
|
if ((position + bytes_requested) > region.end)
|
|
bytes_requested = (size_t)(region.end - position);
|
|
|
|
if (WaitForRead((uint64_t)bytes_requested) == false)
|
|
{
|
|
*bytes_read = 0;
|
|
return error_code;
|
|
}
|
|
|
|
if (need_seek)
|
|
{
|
|
_fseeki64(progressive_file_read, position, SEEK_SET);
|
|
need_seek=false;
|
|
}
|
|
|
|
/* TODO: benski> if r < bytes_requested, then we need to flush the buffer.
|
|
on windows, we can use fflush(progressive_file_read)
|
|
on other platforms it's not guaranteed! */
|
|
size_t r = fread(buffer, 1, bytes_requested, progressive_file_read);
|
|
this->position += r;
|
|
*bytes_read = r;
|
|
return NErr_Success;
|
|
}
|
|
|
|
ns_error_t NXFileObject_ProgressiveDownloader::Seek(uint64_t new_position)
|
|
{
|
|
if (new_position >= (region.end - region.start))
|
|
{
|
|
this->position = region.end - region.start;
|
|
end_of_file=true;
|
|
}
|
|
else
|
|
{
|
|
if (new_position == position)
|
|
return NErr_Success;
|
|
position = new_position;
|
|
need_seek=true;
|
|
|
|
end_of_file=false;
|
|
}
|
|
return NErr_Success;
|
|
}
|
|
|
|
ns_error_t NXFileObject_ProgressiveDownloader::Tell(uint64_t *position)
|
|
{
|
|
if (end_of_file)
|
|
*position = region.end - region.start;
|
|
else
|
|
*position = this->position - region.start;
|
|
return NErr_Success;
|
|
}
|
|
|
|
ns_error_t NXFileObject_ProgressiveDownloader::PeekByte(uint8_t *byte)
|
|
{
|
|
if (position == region.end)
|
|
return NErr_EndOfFile;
|
|
|
|
// make sure we have enough room
|
|
if (WaitForRead((uint64_t)1) == false)
|
|
return error_code;
|
|
|
|
if (need_seek)
|
|
{
|
|
_fseeki64(progressive_file_read, position, SEEK_SET);
|
|
need_seek=false;
|
|
}
|
|
|
|
int read_byte = fgetc(progressive_file_read);
|
|
if (read_byte != EOF)
|
|
ungetc(read_byte, progressive_file_read);
|
|
else
|
|
{
|
|
/* TODO: benski> if we hit the point, then we actually need to flush the buffer.
|
|
on some platforms, fflush(progressive_file_read) will do that, but it's not guaranteed! */
|
|
return NErr_EndOfFile;
|
|
}
|
|
|
|
*byte = (uint8_t)read_byte;
|
|
return NErr_Success;
|
|
}
|
|
|
|
ns_error_t NXFileObject_ProgressiveDownloader::Sync()
|
|
{
|
|
return NErr_NotImplemented;
|
|
}
|
|
|
|
ns_error_t NXFileObject_ProgressiveDownloader::Truncate()
|
|
{
|
|
return NErr_NotImplemented;
|
|
}
|
|
|
|
ns_error_t NXFileObject_ProgressiveDownloader::Write(const void *buffer, size_t bytes)
|
|
{
|
|
return NErr_NotImplemented;
|
|
}
|
|
|
|
bool NXFileObject_ProgressiveDownloader::Available(uint64_t size, uint64_t *available)
|
|
{
|
|
uint64_t end = position+size;
|
|
if (end > region.end)
|
|
end = region.end;
|
|
if (position == region.end)
|
|
{
|
|
if (available)
|
|
*available=0;
|
|
return true;
|
|
}
|
|
return progress_tracker.Valid(position, end, available);
|
|
}
|
|
|
|
ns_error_t NXFileOpenProgressiveDownloader(nx_file_t *out_file, nx_uri_t filename, nx_file_FILE_flags_t flags, jnl_http_t http, const char *user_agent)
|
|
{
|
|
NXFileObject_ProgressiveDownloader *file_object = new (std::nothrow) NXFileObject_ProgressiveDownloader;
|
|
if (!file_object)
|
|
return NErr_OutOfMemory;
|
|
|
|
ns_error_t ret = file_object->Initialize(filename, http, user_agent);
|
|
if (ret != NErr_Success)
|
|
{
|
|
delete file_object;
|
|
return ret;
|
|
}
|
|
|
|
*out_file = (nx_file_t)file_object;
|
|
return NErr_Success;
|
|
}
|
|
|
|
ns_error_t NXFileProgressiveDownloaderAvailable(nx_file_t _f, uint64_t size, uint64_t *available)
|
|
{
|
|
if (!_f)
|
|
return NErr_BadParameter;
|
|
|
|
NXFileObject_ProgressiveDownloader *f = (NXFileObject_ProgressiveDownloader *)_f;
|
|
if (f->Available(size, available))
|
|
return NErr_True;
|
|
else
|
|
return NErr_False;
|
|
} |