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Cache textures by checksum

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This commit is contained in:
Jonathan Neuschäfer 2012-02-08 11:49:24 +01:00 • committed by Perttu Ahola
parent 04085cad3c
commit 4bf5065a9c
6 changed files with 296 additions and 68 deletions
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118
src/client.cpp
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@ -38,6 +38,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "sha1.h"
#include "base64.h"
#include "clientmap.h"
#include "filecache.h"
#include "sound.h"
static std::string getTextureCacheDir()
@ -255,6 +256,7 @@ Client::Client(
m_map_seed(0),
m_password(password),
m_access_denied(false),
m_texture_cache(getTextureCacheDir()),
m_texture_receive_progress(0),
m_textures_received(false),
m_itemdef_received(false),
@ -1412,7 +1414,7 @@ void Client::ProcessData(u8 *data, u32 datasize, u16 sender_peer_id)
//read texture from cache
std::string name = deSerializeString(is);
std::string sha1_texture = deSerializeString(is);
// if name contains illegal characters, ignore the texture
if(!string_allowed(name, TEXTURENAME_ALLOWED_CHARS)){
errorstream<<"Client: ignoring illegal texture name "
@ -1420,74 +1422,50 @@ void Client::ProcessData(u8 *data, u32 datasize, u16 sender_peer_id)
continue;
}
std::string tpath = getTextureCacheDir() + DIR_DELIM + name;
// Read data
std::ifstream fis(tpath.c_str(), std::ios_base::binary);
std::string sha1_decoded = base64_decode(sha1_texture);
std::ostringstream tmp_os(std::ios_base::binary);
bool tex_in_cache = m_texture_cache.loadByChecksum(name,
tmp_os, sha1_decoded);
m_texture_name_sha1_map.set(name, sha1_decoded);
if(tex_in_cache) {
if(fis.good() == false){
infostream<<"Client::Texture not found in cache: "
<<name << " expected it at: "<<tpath<<std::endl;
}
else
{
std::ostringstream tmp_os(std::ios_base::binary);
bool bad = false;
for(;;){
char buf[1024];
fis.read(buf, 1024);
std::streamsize len = fis.gcount();
tmp_os.write(buf, len);
if(fis.eof())
break;
if(!fis.good()){
bad = true;
break;
}
}
if(bad){
infostream<<"Client: Failed to read texture from cache\""
<<name<<"\""<<std::endl;
}
else {
SHA1 sha1;
sha1.addBytes(tmp_os.str().c_str(), tmp_os.str().length());
SHA1 sha1;
sha1.addBytes(tmp_os.str().c_str(), tmp_os.str().length());
unsigned char *digest = sha1.getDigest();
unsigned char *digest = sha1.getDigest();
std::string digest_string = base64_encode(digest, 20);
std::string digest_string = base64_encode(digest, 20);
if (digest_string == sha1_texture) {
// Silly irrlicht's const-incorrectness
Buffer<char> data_rw(tmp_os.str().c_str(), tmp_os.str().size());
if (digest_string == sha1_texture) {
// Silly irrlicht's const-incorrectness
Buffer<char> data_rw(tmp_os.str().c_str(), tmp_os.str().size());
// Create an irrlicht memory file
io::IReadFile *rfile = irrfs->createMemoryReadFile(
*data_rw, tmp_os.str().size(), "_tempreadfile");
assert(rfile);
// Read image
video::IImage *img = vdrv->createImageFromFile(rfile);
if(!img){
infostream<<"Client: Cannot create image from data of "
<<"received texture \""<<name<<"\""<<std::endl;
rfile->drop();
}
else {
m_tsrc->insertSourceImage(name, img);
img->drop();
rfile->drop();
texture_found = true;
}
// Create an irrlicht memory file
io::IReadFile *rfile = irrfs->createMemoryReadFile(
*data_rw, tmp_os.str().size(), "_tempreadfile");
assert(rfile);
// Read image
video::IImage *img = vdrv->createImageFromFile(rfile);
if(!img){
infostream<<"Client: Cannot create image from data of "
<<"received texture \""<<name<<"\""<<std::endl;
rfile->drop();
}
else {
infostream<<"Client::Texture cached sha1 hash not matching server hash: "
<<name << ": server ->"<<sha1_texture <<" client -> "<<digest_string<<std::endl;
}
m_tsrc->insertSourceImage(name, img);
img->drop();
rfile->drop();
free(digest);
texture_found = true;
}
}
else {
infostream<<"Client::Texture cached sha1 hash not matching server hash: "
<<name << ": server ->"<<sha1_texture <<" client -> "<<digest_string<<std::endl;
}
free(digest);
}
//add texture request
@ -1598,15 +1576,15 @@ void Client::ProcessData(u8 *data, u32 datasize, u16 sender_peer_id)
fs::CreateAllDirs(getTextureCacheDir());
std::string filename = getTextureCacheDir() + DIR_DELIM + name;
std::ofstream outfile(filename.c_str(), std::ios_base::binary | std::ios_base::trunc);
if (outfile.good()) {
outfile.write(data.c_str(),data.length());
outfile.close();
}
else {
errorstream<<"Client: Unable to open cached texture file "<< filename <<std::endl;
{
core::map<std::string, std::string>::Node *n;
n = m_texture_name_sha1_map.find(name);
if(n == NULL)
errorstream<<"The server sent a texture that has not been announced."
<<std::endl;
else
m_texture_cache.updateByChecksum(name,
data, n->getValue());
}
m_tsrc->insertSourceImage(name, img);
@ -2382,6 +2360,10 @@ void Client::afterContentReceived()
assert(m_nodedef_received);
assert(m_textures_received);
// remove the information about which checksum each texture
// ought to have
m_texture_name_sha1_map.clear();
// Rebuild inherited images and recreate textures
m_tsrc->rebuildImagesAndTextures();