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Added ability to fetch media from remote server (using cURL library)

master
Ilya Zhuravlev 2012-12-14 15:30:17 +04:00
parent aa46e5c5e7
commit 3578e1d4a7
12 changed files with 278 additions and 49 deletions
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17
cmake/Modules/FindCURL.cmake Normal file
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@ -0,0 +1,17 @@
# - Find curl
# Find the native CURL headers and libraries.
#
# CURL_INCLUDE_DIR - where to find curl/curl.h, etc.
# CURL_LIBRARY - List of libraries when using curl.
# CURL_FOUND - True if curl found.
# Look for the header file.
FIND_PATH(CURL_INCLUDE_DIR NAMES curl/curl.h)
# Look for the library.
FIND_LIBRARY(CURL_LIBRARY NAMES curl)
# handle the QUIETLY and REQUIRED arguments and set CURL_FOUND to TRUE if
# all listed variables are TRUE
INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(CURL DEFAULT_MSG CURL_LIBRARY CURL_INCLUDE_DIR)

5
minetest.conf.example
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@ -141,6 +141,10 @@
# 2: enable high level shaders
#enable_shaders = 2
# will only work for servers which use remote_media setting
# and only for clients compiled with cURL
#media_fetch_threads = 8
#
# Server stuff
#
@ -217,3 +221,4 @@
#congestion_control_aim_rtt = 0.2
#congestion_control_max_rate = 400
#congestion_control_min_rate = 10
#remote_media =

23
src/CMakeLists.txt
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@ -6,6 +6,19 @@ mark_as_advanced(EXECUTABLE_OUTPUT_PATH LIBRARY_OUTPUT_PATH)
mark_as_advanced(JTHREAD_INCLUDE_DIR JTHREAD_LIBRARY)
mark_as_advanced(SQLITE3_INCLUDE_DIR SQLITE3_LIBRARY)
option(ENABLE_CURL "Enable cURL support for fetching media" 1)
if (NOT ENABLE_CURL)
mark_as_advanced(CLEAR CURL_LIBRARY CURL_INCLUDE_DIR)
endif(NOT ENABLE_CURL)
find_package(CURL)
set(USE_CURL 0)
if (CURL_FOUND AND ENABLE_CURL)
message(STATUS "cURL support enabled")
set(USE_CURL 1)
endif(CURL_FOUND AND ENABLE_CURL)
# user-visible option to enable/disable gettext usage
OPTION(ENABLE_GETTEXT "Use GetText for internationalization" 0)
@ -307,6 +320,16 @@ if(BUILD_CLIENT)
${PLATFORM_LIBS}
${CLIENT_PLATFORM_LIBS}
)
if(USE_CURL)
target_link_libraries(
${PROJECT_NAME}
${CURL_LIBRARY}
)
include_directories(
${CURL_INCLUDE_DIR}
)
endif(USE_CURL)
endif(BUILD_CLIENT)
if(BUILD_SERVER)

221
src/client.cpp
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@ -44,21 +44,17 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "hex.h"
#include "IMeshCache.h"
#include "util/serialize.h"
#include "config.h"
#if USE_CURL
#include <curl/curl.h>
#endif
static std::string getMediaCacheDir()
{
return porting::path_user + DIR_DELIM + "cache" + DIR_DELIM + "media";
}
struct MediaRequest
{
std::string name;
MediaRequest(const std::string &name_=""):
name(name_)
{}
};
/*
QueuedMeshUpdate
*/
@ -223,6 +219,45 @@ void * MeshUpdateThread::Thread()
return NULL;
}
void * MediaFetchThread::Thread()
{
ThreadStarted();
log_register_thread("MediaFetchThread");
DSTACK(__FUNCTION_NAME);
BEGIN_DEBUG_EXCEPTION_HANDLER
#if USE_CURL
CURL *curl;
CURLcode res;
for (core::list<MediaRequest>::Iterator i = m_file_requests.begin();
i != m_file_requests.end(); i++) {
curl = curl_easy_init();
assert(curl);
curl_easy_setopt(curl, CURLOPT_URL, (m_remote_url + i->name).c_str());
curl_easy_setopt(curl, CURLOPT_FAILONERROR, true);
std::ostringstream stream;
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curl_write_data);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &stream);
res = curl_easy_perform(curl);
if (res == CURLE_OK) {
std::string data = stream.str();
m_file_data.push_back(make_pair(i->name, data));
} else {
m_failed.push_back(*i);
infostream << "cURL request failed for " << i->name << std::endl;
}
curl_easy_cleanup(curl);
}
#endif
END_DEBUG_EXCEPTION_HANDLER(errorstream)
return NULL;
}
Client::Client(
IrrlichtDevice *device,
const char *playername,
@ -263,8 +298,9 @@ Client::Client(
m_password(password),
m_access_denied(false),
m_media_cache(getMediaCacheDir()),
m_media_receive_progress(0),
m_media_received(false),
m_media_receive_started(false),
m_media_count(0),
m_media_received_count(0),
m_itemdef_received(false),
m_nodedef_received(false),
m_time_of_day_set(false),
@ -730,6 +766,63 @@ void Client::step(float dtime)
g_profiler->graphAdd("num_processed_meshes", num_processed_meshes);
}
/*
Load fetched media
*/
if (m_media_receive_started) {
bool all_stopped = true;
for (core::list<MediaFetchThread>::Iterator thread = m_media_fetch_threads.begin();
thread != m_media_fetch_threads.end(); thread++) {
all_stopped &= !thread->IsRunning();
while (thread->m_file_data.size() > 0) {
std::pair <std::string, std::string> out = thread->m_file_data.pop_front();
++m_media_received_count;
bool success = loadMedia(out.second, out.first);
if(success){
verbosestream<<"Client: Loaded received media: "
<<"\""<<out.first<<"\". Caching."<<std::endl;
} else{
infostream<<"Client: Failed to load received media: "
<<"\""<<out.first<<"\". Not caching."<<std::endl;
continue;
}
bool did = fs::CreateAllDirs(getMediaCacheDir());
if(!did){
errorstream<<"Could not create media cache directory"
<<std::endl;
}
{
core::map<std::string, std::string>::Node *n;
n = m_media_name_sha1_map.find(out.first);
if(n == NULL)
errorstream<<"The server sent a file that has not "
<<"been announced."<<std::endl;
else
m_media_cache.update_sha1(out.second);
}
}
}
if (all_stopped) {
core::list<MediaRequest> fetch_failed;
for (core::list<MediaFetchThread>::Iterator thread = m_media_fetch_threads.begin();
thread != m_media_fetch_threads.end(); thread++) {
for (core::list<MediaRequest>::Iterator request = thread->m_failed.begin();
request != thread->m_failed.end(); request++)
fetch_failed.push_back(*request);
thread->m_failed.clear();
}
if (fetch_failed.size() > 0) {
infostream << "Failed to remote-fetch " << fetch_failed.size() << " files. "
<< "Requesting them the usual way." << std::endl;
request_media(fetch_failed);
}
m_media_fetch_threads.clear();
}
}
/*
If the server didn't update the inventory in a while, revert
the local inventory (so the player notices the lag problem
@ -907,6 +1000,34 @@ void Client::deletingPeer(con::Peer *peer, bool timeout)
<<"(timeout="<<timeout<<")"<<std::endl;
}
/*
u16 command
u16 number of files requested
for each file {
u16 length of name
string name
}
*/
void Client::request_media(const core::list<MediaRequest> &file_requests)
{
std::ostringstream os(std::ios_base::binary);
writeU16(os, TOSERVER_REQUEST_MEDIA);
writeU16(os, file_requests.size());
for(core::list<MediaRequest>::ConstIterator i = file_requests.begin();
i != file_requests.end(); i++) {
os<<serializeString(i->name);
}
// Make data buffer
std::string s = os.str();
SharedBuffer<u8> data((u8*)s.c_str(), s.size());
// Send as reliable
Send(0, data, true);
infostream<<"Client: Sending media request list to server ("
<<file_requests.size()<<" files)"<<std::endl;
}
void Client::ReceiveAll()
{
DSTACK(__FUNCTION_NAME);
@ -1514,37 +1635,56 @@ void Client::ProcessData(u8 *data, u32 datasize, u16 sender_peer_id)
file_requests.push_back(MediaRequest(name));
}
std::string remote_media = "";
try {
remote_media = deSerializeString(is);
}
catch(SerializationError) {
// not supported by server or turned off
}
m_media_count = file_requests.size();
m_media_receive_started = true;
if (remote_media == "" || !USE_CURL) {
request_media(file_requests);
} else {
#if USE_CURL
for (size_t i = 0; i < g_settings->getU16("media_fetch_threads"); ++i) {
m_media_fetch_threads.push_back(MediaFetchThread(this));
}
core::list<MediaFetchThread>::Iterator cur = m_media_fetch_threads.begin();
for(core::list<MediaRequest>::Iterator i = file_requests.begin();
i != file_requests.end(); i++) {
cur->m_file_requests.push_back(*i);
cur++;
if (cur == m_media_fetch_threads.end())
cur = m_media_fetch_threads.begin();
}
for (core::list<MediaFetchThread>::Iterator i = m_media_fetch_threads.begin();
i != m_media_fetch_threads.end(); i++) {
i->m_remote_url = remote_media;
i->Start();
}
#endif
// notify server we received everything
std::ostringstream os(std::ios_base::binary);
writeU16(os, TOSERVER_RECEIVED_MEDIA);
std::string s = os.str();
SharedBuffer<u8> data((u8*)s.c_str(), s.size());
// Send as reliable
Send(0, data, true);
}
ClientEvent event;
event.type = CE_TEXTURES_UPDATED;
m_client_event_queue.push_back(event);
/*
u16 command
u16 number of files requested
for each file {
u16 length of name
string name
}
*/
std::ostringstream os(std::ios_base::binary);
writeU16(os, TOSERVER_REQUEST_MEDIA);
writeU16(os, file_requests.size());
for(core::list<MediaRequest>::Iterator i = file_requests.begin();
i != file_requests.end(); i++) {
os<<serializeString(i->name);
}
// Make data buffer
std::string s = os.str();
SharedBuffer<u8> data((u8*)s.c_str(), s.size());
// Send as reliable
Send(0, data, true);
infostream<<"Client: Sending media request list to server ("
<<file_requests.size()<<" files)"<<std::endl;
}
else if(command == TOCLIENT_MEDIA)
{
if (m_media_count == 0)
return;
std::string datastring((char*)&data[2], datasize-2);
std::istringstream is(datastring, std::ios_base::binary);
@ -1566,17 +1706,12 @@ void Client::ProcessData(u8 *data, u32 datasize, u16 sender_peer_id)
*/
int num_bunches = readU16(is);
int bunch_i = readU16(is);
if(num_bunches >= 2)
m_media_receive_progress = (float)bunch_i / (float)(num_bunches - 1);
else
m_media_receive_progress = 1.0;
if(bunch_i == num_bunches - 1)
m_media_received = true;
int num_files = readU32(is);
infostream<<"Client: Received files: bunch "<<bunch_i<<"/"
<<num_bunches<<" files="<<num_files
<<" size="<<datasize<<std::endl;
for(int i=0; i<num_files; i++){
m_media_received_count++;
std::string name = deSerializeString(is);
std::string data = deSerializeLongString(is);
@ -2458,7 +2593,7 @@ void Client::afterContentReceived()
infostream<<"Client::afterContentReceived() started"<<std::endl;
assert(m_itemdef_received);
assert(m_nodedef_received);
assert(m_media_received);
assert(texturesReceived());
// remove the information about which checksum each texture
// ought to have

36
src/client.h
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@ -33,6 +33,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "filesys.h"
#include "filecache.h"
#include "localplayer.h"
#include "server.h"
#include "util/pointedthing.h"
struct MeshMakeData;
@ -129,6 +130,24 @@ public:
IGameDef *m_gamedef;
};
class MediaFetchThread : public SimpleThread
{
public:
MediaFetchThread(IGameDef *gamedef):
m_gamedef(gamedef)
{
}
void * Thread();
core::list<MediaRequest> m_file_requests;
MutexedQueue<std::pair<std::string, std::string> > m_file_data;
core::list<MediaRequest> m_failed;
std::string m_remote_url;
IGameDef *m_gamedef;
};
enum ClientEventType
{
CE_NONE,
@ -289,10 +308,13 @@ public:
{ return m_access_denied_reason; }
float mediaReceiveProgress()
{ return m_media_receive_progress; }
{
if (!m_media_receive_started) return 0;
return 1.0 * m_media_received_count / m_media_count;
}
bool texturesReceived()
{ return m_media_received; }
{ return m_media_receive_started && m_media_received_count == m_media_count; }
bool itemdefReceived()
{ return m_itemdef_received; }
bool nodedefReceived()
@ -318,7 +340,9 @@ private:
// Insert a media file appropriately into the appropriate manager
bool loadMedia(const std::string &data, const std::string &filename);
void request_media(const core::list<MediaRequest> &file_requests);
// Virtual methods from con::PeerHandler
void peerAdded(con::Peer *peer);
void deletingPeer(con::Peer *peer, bool timeout);
@ -347,6 +371,7 @@ private:
MtEventManager *m_event;
MeshUpdateThread m_mesh_update_thread;
core::list<MediaFetchThread> m_media_fetch_threads;
ClientEnvironment m_env;
con::Connection m_con;
IrrlichtDevice *m_device;
@ -375,8 +400,9 @@ private:
FileCache m_media_cache;
// Mapping from media file name to SHA1 checksum
core::map<std::string, std::string> m_media_name_sha1_map;
float m_media_receive_progress;
bool m_media_received;
bool m_media_receive_started;
u32 m_media_count;
u32 m_media_received_count;
bool m_itemdef_received;
bool m_nodedef_received;
friend class FarMesh;

6
src/clientserver.h
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@ -267,6 +267,8 @@ enum ToClientCommand
u32 length of data
data
}
u16 length of remote media server url (if applicable)
string url
*/
TOCLIENT_TOOLDEF = 0x39,
@ -571,6 +573,10 @@ enum ToServerCommand
}
*/
TOSERVER_RECEIVED_MEDIA = 0x41,
/*
u16 command
*/
};
#endif

1
src/cmake_config.h.in
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@ -7,6 +7,7 @@
#define CMAKE_VERSION_STRING "@VERSION_STRING@"
#define CMAKE_RUN_IN_PLACE @RUN_IN_PLACE@
#define CMAKE_USE_GETTEXT @USE_GETTEXT@
#define CMAKE_USE_CURL @USE_CURL@
#define CMAKE_USE_SOUND @USE_SOUND@
#define CMAKE_STATIC_SHAREDIR "@SHAREDIR@"

3
src/config.h
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@ -11,6 +11,7 @@
#define RUN_IN_PLACE 0
#define USE_GETTEXT 0
#define USE_SOUND 0
#define USE_CURL 0
#define STATIC_SHAREDIR ""
#define BUILD_INFO "non-cmake"
@ -26,6 +27,8 @@
#define USE_GETTEXT CMAKE_USE_GETTEXT
#undef USE_SOUND
#define USE_SOUND CMAKE_USE_SOUND
#undef USE_CURL
#define USE_CURL CMAKE_USE_CURL
#undef STATIC_SHAREDIR
#define STATIC_SHAREDIR CMAKE_STATIC_SHAREDIR
#undef BUILD_INFO

3
src/defaultsettings.cpp
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@ -119,6 +119,8 @@ void set_default_settings(Settings *settings)
settings->setDefault("preload_item_visuals", "true");
settings->setDefault("enable_shaders", "2");
settings->setDefault("media_fetch_threads", "8");
// Server stuff
// "map-dir" doesn't exist by default.
settings->setDefault("default_game", "minetest");
@ -158,5 +160,6 @@ void set_default_settings(Settings *settings)
settings->setDefault("congestion_control_aim_rtt", "0.2");
settings->setDefault("congestion_control_max_rate", "400");
settings->setDefault("congestion_control_min_rate", "10");
settings->setDefault("remote_media", "");
}

5
src/server.cpp
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@ -2885,6 +2885,9 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
// (definitions and files)
getClient(peer_id)->definitions_sent = true;
}
else if(command == TOSERVER_RECEIVED_MEDIA) {
getClient(peer_id)->definitions_sent = true;
}
else if(command == TOSERVER_INTERACT)
{
std::string datastring((char*)&data[2], datasize-2);
@ -4217,6 +4220,7 @@ void Server::sendMediaAnnouncement(u16 peer_id)
os<<serializeString(j->name);
os<<serializeString(j->sha1_digest);
}
os<<serializeString(g_settings->get("remote_media"));
// Make data buffer
std::string s = os.str();
@ -4224,7 +4228,6 @@ void Server::sendMediaAnnouncement(u16 peer_id)
// Send as reliable
m_con.Send(peer_id, 0, data, true);
}
struct SendableMedia

6
src/util/string.cpp
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@ -41,3 +41,9 @@ std::string translatePassword(std::string playername, std::wstring password)
return pwd;
}
size_t curl_write_data(char *ptr, size_t size, size_t nmemb, void *userdata) {
std::ostringstream *stream = (std::ostringstream*)userdata;
size_t count = size * nmemb;
stream->write(ptr, count);
return count;
}

1
src/util/string.h
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@ -282,6 +282,7 @@ inline std::string wrap_rows(const std::string &from, u32 rowlen)
}
std::string translatePassword(std::string playername, std::wstring password);
size_t curl_write_data(char *ptr, size_t size, size_t nmemb, void *userdata);
#endif