# network_content.cpp

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    00001 /* $Id: network_content.cpp 19857 2010-05-18 21:44:47Z rubidium $ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
    00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
    00008  */
    00009
    00012 #if defined(ENABLE_NETWORK)
    00013
    00014 #include "../stdafx.h"
    00015 #include "../rev.h"
    00016 #include "../ai/ai.hpp"
    00017 #include "../window_func.h"
    00018 #include "../gui.h"
    00019 #include "../variables.h"
    00020 #include "../base_media_base.h"
    00021 #include "../settings_type.h"
    00022 #include "network_content.h"
    00023
    00024 #include "table/strings.h"
    00025
    00026 #if defined(WITH_ZLIB)
    00027 #include <zlib.h>
    00028 #endif
    00029
    00030 extern bool HasScenario(const ContentInfo *ci, bool md5sum);
    00031 ClientNetworkContentSocketHandler _network_content_client;
    00032
    00034 static bool HasGRFConfig(const ContentInfo *ci, bool md5sum)
    00035 {
    00036   return FindGRFConfig(BSWAP32(ci->unique_id), md5sum ? ci->md5sum : NULL) != NULL;
    00037 }
    00038
    00046 typedef bool (*HasProc)(const ContentInfo *ci, bool md5sum);
    00047
    00048 DEF_CONTENT_RECEIVE_COMMAND(Client, PACKET_CONTENT_SERVER_INFO)
    00049 {
    00050   ContentInfo *ci = new ContentInfo();
    00051   ci->type     = (ContentType)p->Recv_uint8();
    00052   ci->id       = (ContentID)p->Recv_uint32();
    00053   ci->filesize = p->Recv_uint32();
    00054
    00055   p->Recv_string(ci->name, lengthof(ci->name));
    00056   p->Recv_string(ci->version, lengthof(ci->name));
    00057   p->Recv_string(ci->url, lengthof(ci->url));
    00058   p->Recv_string(ci->description, lengthof(ci->description),  true);
    00059
    00060   ci->unique_id = p->Recv_uint32();
    00061   for (uint j = 0; j < sizeof(ci->md5sum); j++) {
    00062     ci->md5sum[j] = p->Recv_uint8();
    00063   }
    00064
    00065   ci->dependency_count = p->Recv_uint8();
    00066   ci->dependencies = MallocT<ContentID>(ci->dependency_count);
    00067   for (uint i = 0; i < ci->dependency_count; i++) ci->dependencies[i] = (ContentID)p->Recv_uint32();
    00068
    00069   ci->tag_count = p->Recv_uint8();
    00070   ci->tags = MallocT<char[32]>(ci->tag_count);
    00071   for (uint i = 0; i < ci->tag_count; i++) p->Recv_string(ci->tags[i], lengthof(*ci->tags));
    00072
    00073   if (!ci->IsValid()) {
    00074     delete ci;
    00075     this->Close();
    00076     return false;
    00077   }
    00078
    00079   /* Find the appropriate check function */
    00080   HasProc proc = NULL;
    00081   switch (ci->type) {
    00082     case CONTENT_TYPE_NEWGRF:
    00083       proc = HasGRFConfig;
    00084       break;
    00085
    00086     case CONTENT_TYPE_BASE_GRAPHICS:
    00087       proc = BaseGraphics::HasSet;
    00088       break;
    00089
    00090     case CONTENT_TYPE_BASE_MUSIC:
    00091       proc = BaseMusic::HasSet;
    00092       break;
    00093
    00094     case CONTENT_TYPE_BASE_SOUNDS:
    00095       proc = BaseSounds::HasSet;
    00096       break;
    00097
    00098     case CONTENT_TYPE_AI:
    00099     case CONTENT_TYPE_AI_LIBRARY:
    00100       proc = AI::HasAI; break;
    00101       break;
    00102
    00103     case CONTENT_TYPE_SCENARIO:
    00104     case CONTENT_TYPE_HEIGHTMAP:
    00105       proc = HasScenario;
    00106       break;
    00107
    00108     default:
    00109       break;
    00110   }
    00111
    00112   if (proc != NULL) {
    00113     if (proc(ci, true)) {
    00114       ci->state = ContentInfo::ALREADY_HERE;
    00115     } else {
    00116       ci->state = ContentInfo::UNSELECTED;
    00117       if (proc(ci, false)) ci->upgrade = true;
    00118     }
    00119   } else {
    00120     ci->state = ContentInfo::UNSELECTED;
    00121   }
    00122
    00123   /* Something we don't have and has filesize 0 does not exist in te system */
    00124   if (ci->state == ContentInfo::UNSELECTED && ci->filesize == 0) ci->state = ContentInfo::DOES_NOT_EXIST;
    00125
    00126   /* Do we already have a stub for this? */
    00127   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00128     ContentInfo *ici = *iter;
    00129     if (ici->type == ci->type && ici->unique_id == ci->unique_id &&
    00130         memcmp(ci->md5sum, ici->md5sum, sizeof(ci->md5sum)) == 0) {
    00131       /* Preserve the name if possible */
    00132       if (StrEmpty(ci->name)) strecpy(ci->name, ici->name, lastof(ci->name));
    00133       if (ici->IsSelected()) ci->state = ici->state;
    00134
    00135       delete ici;
    00136       *iter = ci;
    00137
    00138       this->OnReceiveContentInfo(ci);
    00139       return true;
    00140     }
    00141   }
    00142
    00143   /* Missing content info? Don't list it */
    00144   if (ci->filesize == 0) {
    00145     delete ci;
    00146     return true;
    00147   }
    00148
    00149   *this->infos.Append() = ci;
    00150
    00151   /* Incoming data means that we might need to reconsider dependencies */
    00152   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00153     this->CheckDependencyState(*iter);
    00154   }
    00155
    00156   this->OnReceiveContentInfo(ci);
    00157
    00158   return true;
    00159 }
    00160
    00161 void ClientNetworkContentSocketHandler::RequestContentList(ContentType type)
    00162 {
    00163   if (type == CONTENT_TYPE_END) {
    00164     this->RequestContentList(CONTENT_TYPE_BASE_GRAPHICS);
    00165     this->RequestContentList(CONTENT_TYPE_BASE_MUSIC);
    00166     this->RequestContentList(CONTENT_TYPE_BASE_SOUNDS);
    00167     this->RequestContentList(CONTENT_TYPE_SCENARIO);
    00168     this->RequestContentList(CONTENT_TYPE_HEIGHTMAP);
    00169 #ifdef ENABLE_AI
    00170     this->RequestContentList(CONTENT_TYPE_AI);
    00171     this->RequestContentList(CONTENT_TYPE_AI_LIBRARY);
    00172 #endif /* ENABLE_AI */
    00173     this->RequestContentList(CONTENT_TYPE_NEWGRF);
    00174     return;
    00175   }
    00176
    00177   this->Connect();
    00178
    00179   Packet *p = new Packet(PACKET_CONTENT_CLIENT_INFO_LIST);
    00180   p->Send_uint8 ((byte)type);
    00181   p->Send_uint32(_openttd_newgrf_version);
    00182
    00183   this->Send_Packet(p);
    00184 }
    00185
    00186 void ClientNetworkContentSocketHandler::RequestContentList(uint count, const ContentID *content_ids)
    00187 {
    00188   this->Connect();
    00189
    00190   while (count > 0) {
    00191     /* We can "only" send a limited number of IDs in a single packet.
    00192      * A packet begins with the packet size and a byte for the type.
    00193      * Then this packet adds a byte for the content type and a uint16
    00194      * for the count in this packet. The rest of the packet can be
    00195      * used for the IDs. */
    00196     uint p_count = min(count, (SEND_MTU - sizeof(PacketSize) - sizeof(byte) - sizeof(byte) - sizeof(uint16)) / sizeof(uint32));
    00197
    00198     Packet *p = new Packet(PACKET_CONTENT_CLIENT_INFO_ID);
    00199     p->Send_uint16(p_count);
    00200
    00201     for (uint i = 0; i < p_count; i++) {
    00202       p->Send_uint32(content_ids[i]);
    00203     }
    00204
    00205     this->Send_Packet(p);
    00206     count -= p_count;
    00207     content_ids += p_count;
    00208   }
    00209 }
    00210
    00211 void ClientNetworkContentSocketHandler::RequestContentList(ContentVector *cv, bool send_md5sum)
    00212 {
    00213   if (cv == NULL) return;
    00214
    00215   this->Connect();
    00216
    00217   /* 20 is sizeof(uint32) + sizeof(md5sum (byte[16])) */
    00218   assert(cv->Length() < 255);
    00219   assert(cv->Length() < (SEND_MTU - sizeof(PacketSize) - sizeof(byte) - sizeof(uint8)) / (send_md5sum ? 20 : sizeof(uint32)));
    00220
    00221   Packet *p = new Packet(send_md5sum ? PACKET_CONTENT_CLIENT_INFO_EXTID_MD5 : PACKET_CONTENT_CLIENT_INFO_EXTID);
    00222   p->Send_uint8(cv->Length());
    00223
    00224   for (ContentIterator iter = cv->Begin(); iter != cv->End(); iter++) {
    00225     const ContentInfo *ci = *iter;
    00226     p->Send_uint8((byte)ci->type);
    00227     p->Send_uint32(ci->unique_id);
    00228     if (!send_md5sum) continue;
    00229
    00230     for (uint j = 0; j < sizeof(ci->md5sum); j++) {
    00231       p->Send_uint8(ci->md5sum[j]);
    00232     }
    00233   }
    00234
    00235   this->Send_Packet(p);
    00236
    00237   for (ContentIterator iter = cv->Begin(); iter != cv->End(); iter++) {
    00238     ContentInfo *ci = *iter;
    00239     bool found = false;
    00240     for (ContentIterator iter2 = this->infos.Begin(); iter2 != this->infos.End(); iter2++) {
    00241       ContentInfo *ci2 = *iter2;
    00242       if (ci->type == ci2->type && ci->unique_id == ci2->unique_id &&
    00243           (!send_md5sum || memcmp(ci->md5sum, ci2->md5sum, sizeof(ci->md5sum)) == 0)) {
    00244         found = true;
    00245         break;
    00246       }
    00247     }
    00248     if (!found) {
    00249       *this->infos.Append() = ci;
    00250     } else {
    00251       delete ci;
    00252     }
    00253   }
    00254 }
    00255
    00256 void ClientNetworkContentSocketHandler::DownloadSelectedContent(uint &files, uint &bytes, bool fallback)
    00257 {
    00258   bytes = 0;
    00259
    00260   ContentIDList content;
    00261   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00262     const ContentInfo *ci = *iter;
    00263     if (!ci->IsSelected() || ci->state == ContentInfo::ALREADY_HERE) continue;
    00264
    00265     *content.Append() = ci->id;
    00266     bytes += ci->filesize;
    00267   }
    00268
    00269   files = content.Length();
    00270
    00271   /* If there's nothing to download, do nothing. */
    00272   if (files == 0) return;
    00273
    00274   if (_settings_client.network.no_http_content_downloads || fallback) {
    00275     this->DownloadSelectedContentFallback(content);
    00276   } else {
    00277     this->DownloadSelectedContentHTTP(content);
    00278   }
    00279 }
    00280
    00281 void ClientNetworkContentSocketHandler::DownloadSelectedContentHTTP(const ContentIDList &content)
    00282 {
    00283   uint count = content.Length();
    00284
    00285   /* Allocate memory for the whole request.
    00286    * Requests are "id\nid\n..." (as strings), so assume the maximum ID,
    00287    * which is uint32 so 10 characters long. Then the newlines and
    00288    * multiply that all with the count and then add the '\0'. */
    00289   uint bytes = (10 + 1) * count + 1;
    00290   char *content_request = MallocT<char>(bytes);
    00291   const char *lastof = content_request + bytes - 1;
    00292
    00293   char *p = content_request;
    00294   for (const ContentID *id = content.Begin(); id != content.End(); id++) {
    00295     p += seprintf(p, lastof, "%d\n", *id);
    00296   }
    00297
    00298   this->http_response_index = -1;
    00299
    00300   NetworkAddress address(NETWORK_CONTENT_MIRROR_HOST, NETWORK_CONTENT_MIRROR_PORT);
    00301   new NetworkHTTPContentConnecter(address, this, NETWORK_CONTENT_MIRROR_URL, content_request);
    00302   /* NetworkHTTPContentConnecter takes over freeing of content_request! */
    00303 }
    00304
    00305 void ClientNetworkContentSocketHandler::DownloadSelectedContentFallback(const ContentIDList &content)
    00306 {
    00307   uint count = content.Length();
    00308   const ContentID *content_ids = content.Begin();
    00309   this->Connect();
    00310
    00311   while (count > 0) {
    00312     /* We can "only" send a limited number of IDs in a single packet.
    00313      * A packet begins with the packet size and a byte for the type.
    00314      * Then this packet adds a uint16 for the count in this packet.
    00315      * The rest of the packet can be used for the IDs. */
    00316     uint p_count = min(count, (SEND_MTU - sizeof(PacketSize) - sizeof(byte) - sizeof(uint16)) / sizeof(uint32));
    00317
    00318     Packet *p = new Packet(PACKET_CONTENT_CLIENT_CONTENT);
    00319     p->Send_uint16(p_count);
    00320
    00321     for (uint i = 0; i < p_count; i++) {
    00322       p->Send_uint32(content_ids[i]);
    00323     }
    00324
    00325     this->Send_Packet(p);
    00326     count -= p_count;
    00327     content_ids += p_count;
    00328   }
    00329 }
    00330
    00338 static char *GetFullFilename(const ContentInfo *ci, bool compressed)
    00339 {
    00340   Subdirectory dir;
    00341   switch (ci->type) {
    00342     default: return NULL;
    00343     case CONTENT_TYPE_BASE_GRAPHICS: dir = DATA_DIR;       break;
    00344     case CONTENT_TYPE_BASE_MUSIC:    dir = GM_DIR;         break;
    00345     case CONTENT_TYPE_BASE_SOUNDS:   dir = DATA_DIR;       break;
    00346     case CONTENT_TYPE_NEWGRF:        dir = DATA_DIR;       break;
    00347     case CONTENT_TYPE_AI:            dir = AI_DIR;         break;
    00348     case CONTENT_TYPE_AI_LIBRARY:    dir = AI_LIBRARY_DIR; break;
    00349     case CONTENT_TYPE_SCENARIO:      dir = SCENARIO_DIR;   break;
    00350     case CONTENT_TYPE_HEIGHTMAP:     dir = HEIGHTMAP_DIR;  break;
    00351   }
    00352
    00353   static char buf[MAX_PATH];
    00354   FioGetFullPath(buf, lengthof(buf), SP_AUTODOWNLOAD_DIR, dir, ci->filename);
    00355   strecat(buf, compressed ? ".tar.gz" : ".tar", lastof(buf));
    00356
    00357   return buf;
    00358 }
    00359
    00365 static bool GunzipFile(const ContentInfo *ci)
    00366 {
    00367 #if defined(WITH_ZLIB)
    00368   bool ret = true;
    00369   FILE *ftmp = fopen(GetFullFilename(ci, true), "rb");
    00370   gzFile fin = gzdopen(fileno(ftmp), "rb");
    00371   FILE *fout = fopen(GetFullFilename(ci, false), "wb");
    00372
    00373   if (fin == NULL || fout == NULL) {
    00374     ret = false;
    00375   } else {
    00376     byte buff[8192];
    00377     while (1) {
    00378       int read = gzread(fin, buff, sizeof(buff));
    00379       if (read == 0) {
    00380         /* If gzread() returns 0, either the end-of-file has been
    00381          * reached or an underlying read error has occurred.
    00382          *
    00383          * gzeof() can't be used, because:
    00384          * 1.2.5 - it is safe, 1 means 'everything was OK'
    00385          * 1.2.3.5, 1.2.4 - 0 or 1 is returned 'randomly'
    00386          * 1.2.3.3 - 1 is returned for truncated archive
    00387          *
    00388          * So we use gzerror(). When proper end of archive
    00389          * has been reached, then:
    00390          * errnum == Z_STREAM_END in 1.2.3.3,
    00391          * errnum == 0 in 1.2.4 and 1.2.5 */
    00392         int errnum;
    00393         gzerror(fin, &errnum);
    00394         if (errnum != 0 && errnum != Z_STREAM_END) ret = false;
    00395         break;
    00396       }
    00397       if (read < 0 || (size_t)read != fwrite(buff, 1, read, fout)) {
    00398         /* If gzread() returns -1, there was an error in archive */
    00399         ret = false;
    00400         break;
    00401       }
    00402       /* DO NOT DO THIS! It will fail to detect broken archive with 1.2.3.3!
    00403        * if (read < sizeof(buff)) break; */
    00404     }
    00405   }
    00406
    00407   if (fin != NULL) {
    00408     /* Closes ftmp too! */
    00409     gzclose(fin);
    00410   } else if (ftmp != NULL) {
    00411     /* In case the gz stream was opened correctly this will
    00412      * be closed by gzclose. */
    00413     fclose(ftmp);
    00414   }
    00415   if (fout != NULL) fclose(fout);
    00416
    00417   return ret;
    00418 #else
    00419   NOT_REACHED();
    00420 #endif /* defined(WITH_ZLIB) */
    00421 }
    00422
    00423 DEF_CONTENT_RECEIVE_COMMAND(Client, PACKET_CONTENT_SERVER_CONTENT)
    00424 {
    00425   if (this->curFile == NULL) {
    00426     delete this->curInfo;
    00427     /* When we haven't opened a file this must be our first packet with metadata. */
    00428     this->curInfo = new ContentInfo;
    00429     this->curInfo->type     = (ContentType)p->Recv_uint8();
    00430     this->curInfo->id       = (ContentID)p->Recv_uint32();
    00431     this->curInfo->filesize = p->Recv_uint32();
    00432     p->Recv_string(this->curInfo->filename, lengthof(this->curInfo->filename));
    00433
    00434     if (!this->BeforeDownload()) {
    00435       this->Close();
    00436       return false;
    00437     }
    00438   } else {
    00439     /* We have a file opened, thus are downloading internal content */
    00440     size_t toRead = (size_t)(p->size - p->pos);
    00441     if (fwrite(p->buffer + p->pos, 1, toRead, this->curFile) != toRead) {
    00442       DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);
    00443       ShowErrorMessage(STR_CONTENT_ERROR_COULD_NOT_DOWNLOAD_FILE_NOT_WRITABLE, STR_CONTENT_ERROR_COULD_NOT_DOWNLOAD, 0, 0);
    00444       this->Close();
    00445       fclose(this->curFile);
    00446       this->curFile = NULL;
    00447
    00448       return false;
    00449     }
    00450
    00451     this->OnDownloadProgress(this->curInfo, (uint)toRead);
    00452
    00453     if (toRead == 0) this->AfterDownload();
    00454   }
    00455
    00456   return true;
    00457 }
    00458
    00463 bool ClientNetworkContentSocketHandler::BeforeDownload()
    00464 {
    00465   if (!this->curInfo->IsValid()) {
    00466     delete this->curInfo;
    00467     this->curInfo = NULL;
    00468     return false;
    00469   }
    00470
    00471   if (this->curInfo->filesize != 0) {
    00472     /* The filesize is > 0, so we are going to download it */
    00473     const char *filename = GetFullFilename(this->curInfo, true);
    00474     if (filename == NULL) {
    00475       /* Unless that fails ofcourse... */
    00476       DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);
    00477       ShowErrorMessage(STR_CONTENT_ERROR_COULD_NOT_DOWNLOAD_FILE_NOT_WRITABLE, STR_CONTENT_ERROR_COULD_NOT_DOWNLOAD, 0, 0);
    00478       return false;
    00479     }
    00480
    00481     this->curFile = fopen(filename, "wb");
    00482   }
    00483   return true;
    00484 }
    00485
    00490 void ClientNetworkContentSocketHandler::AfterDownload()
    00491 {
    00492   /* We read nothing; that's our marker for end-of-stream.
    00493    * Now gunzip the tar and make it known. */
    00494   fclose(this->curFile);
    00495   this->curFile = NULL;
    00496
    00497   if (GunzipFile(this->curInfo)) {
    00498     unlink(GetFullFilename(this->curInfo, true));
    00499
    00500     TarScanner ts;
    00501     ts.AddFile(GetFullFilename(this->curInfo, false), 0);
    00502
    00503     if (this->curInfo->type == CONTENT_TYPE_BASE_MUSIC) {
    00504       /* Music can't be in a tar. So extract the tar! */
    00505       ExtractTar(GetFullFilename(this->curInfo, false));
    00506       unlink(GetFullFilename(this->curInfo, false));
    00507     }
    00508
    00509     this->OnDownloadComplete(this->curInfo->id);
    00510   } else {
    00511     ShowErrorMessage(STR_CONTENT_ERROR_COULD_NOT_EXTRACT, INVALID_STRING_ID, 0, 0);
    00512   }
    00513 }
    00514
    00515 /* Also called to just clean up the mess. */
    00516 void ClientNetworkContentSocketHandler::OnFailure()
    00517 {
    00518   /* If we fail, download the rest via the 'old' system. */
    00519   uint files, bytes;
    00520   this->DownloadSelectedContent(files, bytes, true);
    00521
    00522   this->http_response.Reset();
    00523   this->http_response_index = -2;
    00524
    00525   if (this->curFile != NULL) {
    00526     fclose(this->curFile);
    00527     this->curFile = NULL;
    00528   }
    00529 }
    00530
    00531 void ClientNetworkContentSocketHandler::OnReceiveData(const char *data, size_t length)
    00532 {
    00533   assert(data == NULL || length != 0);
    00534
    00535   /* Ignore any latent data coming from a connection we closed. */
    00536   if (this->http_response_index == -2) return;
    00537
    00538   if (this->http_response_index == -1) {
    00539     if (data != NULL) {
    00540       /* Append the rest of the response. */
    00541       memcpy(this->http_response.Append((uint)length), data, length);
    00542       return;
    00543     } else {
    00544       /* Make sure the response is properly terminated. */
    00545       *this->http_response.Append() = '\0';
    00546
    00547       /* And prepare for receiving the rest of the data. */
    00548       this->http_response_index = 0;
    00549     }
    00550   }
    00551
    00552   if (data != NULL) {
    00553     /* We have data, so write it to the file. */
    00554     if (fwrite(data, 1, length, this->curFile) != length) {
    00555       /* Writing failed somehow, let try via the old method. */
    00556       this->OnFailure();
    00557     } else {
    00558       /* Just received the data. */
    00559       this->OnDownloadProgress(this->curInfo, (uint)length);
    00560     }
    00561     /* Nothing more to do now. */
    00562     return;
    00563   }
    00564
    00565   if (this->curFile != NULL) {
    00566     /* We've finished downloading a file. */
    00567     this->AfterDownload();
    00568   }
    00569
    00570   if ((uint)this->http_response_index >= this->http_response.Length()) {
    00571     /* It's not a real failure, but if there's
    00572      * nothing more to download it helps with
    00573      * cleaning up the stuff we allocated. */
    00574     this->OnFailure();
    00575     return;
    00576   }
    00577
    00578   delete this->curInfo;
    00579   /* When we haven't opened a file this must be our first packet with metadata. */
    00580   this->curInfo = new ContentInfo;
    00581
    00583 #define check_not_null(p) { if ((p) == NULL) { this->OnFailure(); return; } }
    00584
    00585 #define check_and_terminate(p) { check_not_null(p); *(p) = '\0'; }
    00586
    00587   for (;;) {
    00588     char *str = this->http_response.Begin() + this->http_response_index;
    00589     char *p = strchr(str, '\n');
    00590     check_and_terminate(p);
    00591
    00592     /* Update the index for the next one */
    00593     this->http_response_index += (int)strlen(str) + 1;
    00594
    00595     /* Read the ID */
    00596     p = strchr(str, ',');
    00597     check_and_terminate(p);
    00598     this->curInfo->id = (ContentID)atoi(str);
    00599
    00600     /* Read the type */
    00601     str = p + 1;
    00602     p = strchr(str, ',');
    00603     check_and_terminate(p);
    00604     this->curInfo->type = (ContentType)atoi(str);
    00605
    00606     /* Read the file size */
    00607     str = p + 1;
    00608     p = strchr(str, ',');
    00609     check_and_terminate(p);
    00610     this->curInfo->filesize = atoi(str);
    00611
    00612     /* Read the URL */
    00613     str = p + 1;
    00614     /* Is it a fallback URL? If so, just continue with the next one. */
    00615     if (strncmp(str, "ottd", 4) == 0) {
    00616       if ((uint)this->http_response_index >= this->http_response.Length()) {
    00617         /* Have we gone through all lines? */
    00618         this->OnFailure();
    00619         return;
    00620       }
    00621       continue;
    00622     }
    00623
    00624     p = strrchr(str, '/');
    00625     check_not_null(p);
    00626     p++; // Start after the '/'
    00627
    00628     char tmp[MAX_PATH];
    00629     if (strecpy(tmp, p, lastof(tmp)) == lastof(tmp)) {
    00630       this->OnFailure();
    00631       return;
    00632     }
    00633     /* Remove the extension from the string. */
    00634     for (uint i = 0; i < 2; i++) {
    00635       p = strrchr(tmp, '.');
    00636       check_and_terminate(p);
    00637     }
    00638
    00639     /* Copy the string, without extension, to the filename. */
    00640     strecpy(this->curInfo->filename, tmp, lastof(this->curInfo->filename));
    00641
    00642     /* Request the next file. */
    00643     if (!this->BeforeDownload()) {
    00644       this->OnFailure();
    00645       return;
    00646     }
    00647
    00648     NetworkHTTPSocketHandler::Connect(str, this);
    00649     return;
    00650   }
    00651
    00652 #undef check
    00653 #undef check_and_terminate
    00654 }
    00655
    00661 ClientNetworkContentSocketHandler::ClientNetworkContentSocketHandler() :
    00662   NetworkContentSocketHandler(),
    00663   http_response_index(-2),
    00664   curFile(NULL),
    00665   curInfo(NULL),
    00666   isConnecting(false)
    00667 {
    00668 }
    00669
    00671 ClientNetworkContentSocketHandler::~ClientNetworkContentSocketHandler()
    00672 {
    00673   delete this->curInfo;
    00674   if (this->curFile != NULL) fclose(this->curFile);
    00675
    00676   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) delete *iter;
    00677 }
    00678
    00679 class NetworkContentConnecter : TCPConnecter {
    00680 public:
    00681   NetworkContentConnecter(const NetworkAddress &address) : TCPConnecter(address) {}
    00682
    00683   virtual void OnFailure()
    00684   {
    00685     _network_content_client.isConnecting = false;
    00686     _network_content_client.OnConnect(false);
    00687   }
    00688
    00689   virtual void OnConnect(SOCKET s)
    00690   {
    00691     assert(_network_content_client.sock == INVALID_SOCKET);
    00692     _network_content_client.isConnecting = false;
    00693     _network_content_client.sock = s;
    00694     _network_content_client.Reopen();
    00695     _network_content_client.OnConnect(true);
    00696   }
    00697 };
    00698
    00702 void ClientNetworkContentSocketHandler::Connect()
    00703 {
    00704   this->lastActivity = _realtime_tick;
    00705
    00706   if (this->sock != INVALID_SOCKET || this->isConnecting) return;
    00707   this->isConnecting = true;
    00708   new NetworkContentConnecter(NetworkAddress(NETWORK_CONTENT_SERVER_HOST, NETWORK_CONTENT_SERVER_PORT, AF_UNSPEC));
    00709 }
    00710
    00714 void ClientNetworkContentSocketHandler::Close()
    00715 {
    00716   if (this->sock == INVALID_SOCKET) return;
    00717   NetworkContentSocketHandler::Close();
    00718
    00719   this->OnDisconnect();
    00720 }
    00721
    00726 void ClientNetworkContentSocketHandler::SendReceive()
    00727 {
    00728   if (this->sock == INVALID_SOCKET || this->isConnecting) return;
    00729
    00730   if (this->lastActivity + IDLE_TIMEOUT < _realtime_tick) {
    00731     this->Close();
    00732     return;
    00733   }
    00734
    00735   fd_set read_fd, write_fd;
    00736   struct timeval tv;
    00737
    00738   FD_ZERO(&read_fd);
    00739   FD_ZERO(&write_fd);
    00740
    00741   FD_SET(this->sock, &read_fd);
    00742   FD_SET(this->sock, &write_fd);
    00743
    00744   tv.tv_sec = tv.tv_usec = 0; // don't block at all.
    00745 #if !defined(__MORPHOS__) && !defined(__AMIGA__)
    00746   select(FD_SETSIZE, &read_fd, &write_fd, NULL, &tv);
    00747 #else
    00748   WaitSelect(FD_SETSIZE, &read_fd, &write_fd, NULL, &tv, NULL);
    00749 #endif
    00750   if (FD_ISSET(this->sock, &read_fd)) {
    00751     this->Recv_Packets();
    00752     this->lastActivity = _realtime_tick;
    00753   }
    00754
    00755   this->writable = !!FD_ISSET(this->sock, &write_fd);
    00756   this->Send_Packets();
    00757 }
    00758
    00763 void ClientNetworkContentSocketHandler::DownloadContentInfo(ContentID cid)
    00764 {
    00765   /* When we tried to download it already, don't try again */
    00766   if (this->requested.Contains(cid)) return;
    00767
    00768   *this->requested.Append() = cid;
    00769   assert(this->requested.Contains(cid));
    00770   this->RequestContentList(1, &cid);
    00771 }
    00772
    00778 ContentInfo *ClientNetworkContentSocketHandler::GetContent(ContentID cid)
    00779 {
    00780   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00781     ContentInfo *ci = *iter;
    00782     if (ci->id == cid) return ci;
    00783   }
    00784   return NULL;
    00785 }
    00786
    00787
    00792 void ClientNetworkContentSocketHandler::Select(ContentID cid)
    00793 {
    00794   ContentInfo *ci = this->GetContent(cid);
    00795   if (ci == NULL || ci->state != ContentInfo::UNSELECTED) return;
    00796
    00797   ci->state = ContentInfo::SELECTED;
    00798   this->CheckDependencyState(ci);
    00799 }
    00800
    00805 void ClientNetworkContentSocketHandler::Unselect(ContentID cid)
    00806 {
    00807   ContentInfo *ci = this->GetContent(cid);
    00808   if (ci == NULL || !ci->IsSelected()) return;
    00809
    00810   ci->state = ContentInfo::UNSELECTED;
    00811   this->CheckDependencyState(ci);
    00812 }
    00813
    00815 void ClientNetworkContentSocketHandler::SelectAll()
    00816 {
    00817   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00818     ContentInfo *ci = *iter;
    00819     if (ci->state == ContentInfo::UNSELECTED) {
    00820       ci->state = ContentInfo::SELECTED;
    00821       this->CheckDependencyState(ci);
    00822     }
    00823   }
    00824 }
    00825
    00827 void ClientNetworkContentSocketHandler::SelectUpgrade()
    00828 {
    00829   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00830     ContentInfo *ci = *iter;
    00831     if (ci->state == ContentInfo::UNSELECTED && ci->upgrade) {
    00832       ci->state = ContentInfo::SELECTED;
    00833       this->CheckDependencyState(ci);
    00834     }
    00835   }
    00836 }
    00837
    00839 void ClientNetworkContentSocketHandler::UnselectAll()
    00840 {
    00841   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00842     ContentInfo *ci = *iter;
    00843     if (ci->IsSelected() && ci->state != ContentInfo::ALREADY_HERE) ci->state = ContentInfo::UNSELECTED;
    00844   }
    00845 }
    00846
    00848 void ClientNetworkContentSocketHandler::ToggleSelectedState(const ContentInfo *ci)
    00849 {
    00850   switch (ci->state) {
    00851     case ContentInfo::SELECTED:
    00852     case ContentInfo::AUTOSELECTED:
    00853       this->Unselect(ci->id);
    00854       break;
    00855
    00856     case ContentInfo::UNSELECTED:
    00857       this->Select(ci->id);
    00858       break;
    00859
    00860     default:
    00861       break;
    00862   }
    00863 }
    00864
    00870 void ClientNetworkContentSocketHandler::ReverseLookupDependency(ConstContentVector &parents, const ContentInfo *child) const
    00871 {
    00872   for (ConstContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00873     const ContentInfo *ci = *iter;
    00874     if (ci == child) continue;
    00875
    00876     for (uint i = 0; i < ci->dependency_count; i++) {
    00877       if (ci->dependencies[i] == child->id) {
    00878         *parents.Append() = ci;
    00879         break;
    00880       }
    00881     }
    00882   }
    00883 }
    00884
    00890 void ClientNetworkContentSocketHandler::ReverseLookupTreeDependency(ConstContentVector &tree, const ContentInfo *child) const
    00891 {
    00892   *tree.Append() = child;
    00893
    00894   /* First find all direct parents */
    00895   for (ConstContentIterator iter = tree.Begin(); iter != tree.End(); iter++) {
    00896     ConstContentVector parents;
    00897     this->ReverseLookupDependency(parents, *iter);
    00898
    00899     for (ConstContentIterator piter = parents.Begin(); piter != parents.End(); piter++) {
    00900       tree.Include(*piter);
    00901     }
    00902   }
    00903 }
    00904
    00909 void ClientNetworkContentSocketHandler::CheckDependencyState(ContentInfo *ci)
    00910 {
    00911   if (ci->IsSelected() || ci->state == ContentInfo::ALREADY_HERE) {
    00912     /* Selection is easy; just walk all children and set the
    00913      * autoselected state. That way we can see what we automatically
    00914      * selected and thus can unselect when a dependency is removed. */
    00915     for (uint i = 0; i < ci->dependency_count; i++) {
    00916       ContentInfo *c = this->GetContent(ci->dependencies[i]);
    00917       if (c == NULL) {
    00918         this->DownloadContentInfo(ci->dependencies[i]);
    00919       } else if (c->state == ContentInfo::UNSELECTED) {
    00920         c->state = ContentInfo::AUTOSELECTED;
    00921         this->CheckDependencyState(c);
    00922       }
    00923     }
    00924     return;
    00925   }
    00926
    00927   if (ci->state != ContentInfo::UNSELECTED) return;
    00928
    00929   /* For unselection we need to find the parents of us. We need to
    00930    * unselect them. After that we unselect all children that we
    00931    * depend on and are not used as dependency for us, but only when
    00932    * we automatically selected them. */
    00933   ConstContentVector parents;
    00934   this->ReverseLookupDependency(parents, ci);
    00935   for (ConstContentIterator iter = parents.Begin(); iter != parents.End(); iter++) {
    00936     const ContentInfo *c = *iter;
    00937     if (!c->IsSelected()) continue;
    00938
    00939     this->Unselect(c->id);
    00940   }
    00941
    00942   for (uint i = 0; i < ci->dependency_count; i++) {
    00943     const ContentInfo *c = this->GetContent(ci->dependencies[i]);
    00944     if (c == NULL) {
    00945       DownloadContentInfo(ci->dependencies[i]);
    00946       continue;
    00947     }
    00948     if (c->state != ContentInfo::AUTOSELECTED) continue;
    00949
    00950     /* Only unselect when WE are the only parent. */
    00951     parents.Clear();
    00952     this->ReverseLookupDependency(parents, c);
    00953
    00954     /* First check whether anything depends on us */
    00955     int sel_count = 0;
    00956     bool force_selection = false;
    00957     for (ConstContentIterator iter = parents.Begin(); iter != parents.End(); iter++) {
    00958       if ((*iter)->IsSelected()) sel_count++;
    00959       if ((*iter)->state == ContentInfo::SELECTED) force_selection = true;
    00960     }
    00961     if (sel_count == 0) {
    00962       /* Nothing depends on us */
    00963       this->Unselect(c->id);
    00964       continue;
    00965     }
    00966     /* Something manually selected depends directly on us */
    00967     if (force_selection) continue;
    00968
    00969     /* "Flood" search to find all items in the dependency graph*/
    00970     parents.Clear();
    00971     this->ReverseLookupTreeDependency(parents, c);
    00972
    00973     /* Is there anything that is "force" selected?, if so... we're done. */
    00974     for (ConstContentIterator iter = parents.Begin(); iter != parents.End(); iter++) {
    00975       if ((*iter)->state != ContentInfo::SELECTED) continue;
    00976
    00977       force_selection = true;
    00978       break;
    00979     }
    00980
    00981     /* So something depended directly on us */
    00982     if (force_selection) continue;
    00983
    00984     /* Nothing depends on us, mark the whole graph as unselected.
    00985      * After that's done run over them once again to test their children
    00986      * to unselect. Don't do it immediatelly because it'll do exactly what
    00987      * we're doing now. */
    00988     for (ConstContentIterator iter = parents.Begin(); iter != parents.End(); iter++) {
    00989       const ContentInfo *c = *iter;
    00990       if (c->state == ContentInfo::AUTOSELECTED) this->Unselect(c->id);
    00991     }
    00992     for (ConstContentIterator iter = parents.Begin(); iter != parents.End(); iter++) {
    00993       this->CheckDependencyState(this->GetContent((*iter)->id));
    00994     }
    00995   }
    00996 }
    00997
    00998 void ClientNetworkContentSocketHandler::Clear()
    00999 {
    01000   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) delete *iter;
    01001
    01002   this->infos.Clear();
    01003   this->requested.Clear();
    01004 }
    01005
    01006 /*** CALLBACK ***/
    01007
    01008 void ClientNetworkContentSocketHandler::OnConnect(bool success)
    01009 {
    01010   for (ContentCallback **iter = this->callbacks.Begin(); iter != this->callbacks.End(); /* nothing */) {
    01011     ContentCallback *cb = *iter;
    01012     cb->OnConnect(success);
    01013     if (iter != this->callbacks.End() && *iter == cb) iter++;
    01014   }
    01015 }
    01016
    01017 void ClientNetworkContentSocketHandler::OnDisconnect()
    01018 {
    01019   for (ContentCallback **iter = this->callbacks.Begin(); iter != this->callbacks.End(); /* nothing */) {
    01020     ContentCallback *cb = *iter;
    01021     cb->OnDisconnect();
    01022     if (iter != this->callbacks.End() && *iter == cb) iter++;
    01023   }
    01024 }
    01025
    01026 void ClientNetworkContentSocketHandler::OnReceiveContentInfo(const ContentInfo *ci)
    01027 {
    01028   for (ContentCallback **iter = this->callbacks.Begin(); iter != this->callbacks.End(); /* nothing */) {
    01029     ContentCallback *cb = *iter;
    01030     cb->OnReceiveContentInfo(ci);
    01031     if (iter != this->callbacks.End() && *iter == cb) iter++;
    01032   }
    01033 }
    01034
    01035 void ClientNetworkContentSocketHandler::OnDownloadProgress(const ContentInfo *ci, uint bytes)
    01036 {
    01037   for (ContentCallback **iter = this->callbacks.Begin(); iter != this->callbacks.End(); /* nothing */) {
    01038     ContentCallback *cb = *iter;
    01039     cb->OnDownloadProgress(ci, bytes);
    01040     if (iter != this->callbacks.End() && *iter == cb) iter++;
    01041   }
    01042 }
    01043
    01044 void ClientNetworkContentSocketHandler::OnDownloadComplete(ContentID cid)
    01045 {
    01046   ContentInfo *ci = this->GetContent(cid);
    01047   if (ci != NULL) {
    01048     ci->state = ContentInfo::ALREADY_HERE;
    01049   }
    01050
    01051   for (ContentCallback **iter = this->callbacks.Begin(); iter != this->callbacks.End(); /* nothing */) {
    01052     ContentCallback *cb = *iter;
    01053     cb->OnDownloadComplete(cid);
    01054     if (iter != this->callbacks.End() && *iter == cb) iter++;
    01055   }
    01056 }
    01057
    01058 #endif /* ENABLE_NETWORK */