# network_content.cpp

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    00001 /* $Id$ */
    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 "../game/game.hpp"
    00018 #include "../window_func.h"
    00019 #include "../error.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
    00033 ClientNetworkContentSocketHandler _network_content_client;
    00034
    00036 static bool HasGRFConfig(const ContentInfo *ci, bool md5sum)
    00037 {
    00038   return FindGRFConfig(BSWAP32(ci->unique_id), md5sum ? FGCM_EXACT : FGCM_ANY, md5sum ? ci->md5sum : NULL) != NULL;
    00039 }
    00040
    00048 typedef bool (*HasProc)(const ContentInfo *ci, bool md5sum);
    00049
    00050 bool ClientNetworkContentSocketHandler::Receive_SERVER_INFO(Packet *p)
    00051 {
    00052   ContentInfo *ci = new ContentInfo();
    00053   ci->type     = (ContentType)p->Recv_uint8();
    00054   ci->id       = (ContentID)p->Recv_uint32();
    00055   ci->filesize = p->Recv_uint32();
    00056
    00057   p->Recv_string(ci->name, lengthof(ci->name));
    00058   p->Recv_string(ci->version, lengthof(ci->name));
    00059   p->Recv_string(ci->url, lengthof(ci->url));
    00060   p->Recv_string(ci->description, lengthof(ci->description), SVS_REPLACE_WITH_QUESTION_MARK | SVS_ALLOW_NEWLINE);
    00061
    00062   ci->unique_id = p->Recv_uint32();
    00063   for (uint j = 0; j < sizeof(ci->md5sum); j++) {
    00064     ci->md5sum[j] = p->Recv_uint8();
    00065   }
    00066
    00067   ci->dependency_count = p->Recv_uint8();
    00068   ci->dependencies = MallocT<ContentID>(ci->dependency_count);
    00069   for (uint i = 0; i < ci->dependency_count; i++) ci->dependencies[i] = (ContentID)p->Recv_uint32();
    00070
    00071   ci->tag_count = p->Recv_uint8();
    00072   ci->tags = MallocT<char[32]>(ci->tag_count);
    00073   for (uint i = 0; i < ci->tag_count; i++) p->Recv_string(ci->tags[i], lengthof(*ci->tags));
    00074
    00075   if (!ci->IsValid()) {
    00076     delete ci;
    00077     this->Close();
    00078     return false;
    00079   }
    00080
    00081   /* Find the appropriate check function */
    00082   HasProc proc = NULL;
    00083   switch (ci->type) {
    00084     case CONTENT_TYPE_NEWGRF:
    00085       proc = HasGRFConfig;
    00086       break;
    00087
    00088     case CONTENT_TYPE_BASE_GRAPHICS:
    00089       proc = BaseGraphics::HasSet;
    00090       break;
    00091
    00092     case CONTENT_TYPE_BASE_MUSIC:
    00093       proc = BaseMusic::HasSet;
    00094       break;
    00095
    00096     case CONTENT_TYPE_BASE_SOUNDS:
    00097       proc = BaseSounds::HasSet;
    00098       break;
    00099
    00100     case CONTENT_TYPE_AI:
    00101       proc = AI::HasAI; break;
    00102       break;
    00103
    00104     case CONTENT_TYPE_AI_LIBRARY:
    00105       proc = AI::HasAILibrary; break;
    00106       break;
    00107
    00108     case CONTENT_TYPE_GAME:
    00109       proc = Game::HasGame; break;
    00110       break;
    00111
    00112     case CONTENT_TYPE_GAME_LIBRARY:
    00113       proc = Game::HasGameLibrary; break;
    00114       break;
    00115
    00116     case CONTENT_TYPE_SCENARIO:
    00117     case CONTENT_TYPE_HEIGHTMAP:
    00118       proc = HasScenario;
    00119       break;
    00120
    00121     default:
    00122       break;
    00123   }
    00124
    00125   if (proc != NULL) {
    00126     if (proc(ci, true)) {
    00127       ci->state = ContentInfo::ALREADY_HERE;
    00128     } else {
    00129       ci->state = ContentInfo::UNSELECTED;
    00130       if (proc(ci, false)) ci->upgrade = true;
    00131     }
    00132   } else {
    00133     ci->state = ContentInfo::UNSELECTED;
    00134   }
    00135
    00136   /* Something we don't have and has filesize 0 does not exist in te system */
    00137   if (ci->state == ContentInfo::UNSELECTED && ci->filesize == 0) ci->state = ContentInfo::DOES_NOT_EXIST;
    00138
    00139   /* Do we already have a stub for this? */
    00140   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00141     ContentInfo *ici = *iter;
    00142     if (ici->type == ci->type && ici->unique_id == ci->unique_id &&
    00143         memcmp(ci->md5sum, ici->md5sum, sizeof(ci->md5sum)) == 0) {
    00144       /* Preserve the name if possible */
    00145       if (StrEmpty(ci->name)) strecpy(ci->name, ici->name, lastof(ci->name));
    00146       if (ici->IsSelected()) ci->state = ici->state;
    00147
    00148       /*
    00149        * As ici might be selected by the content window we cannot delete that.
    00150        * However, we want to keep most of the values of ci, except the values
    00151        * we (just) already preserved.
    00152        * So transfer data and ownership of allocated memory from ci to ici.
    00153        */
    00154       ici->TransferFrom(ci);
    00155       delete ci;
    00156
    00157       this->OnReceiveContentInfo(ici);
    00158       return true;
    00159     }
    00160   }
    00161
    00162   /* Missing content info? Don't list it */
    00163   if (ci->filesize == 0) {
    00164     delete ci;
    00165     return true;
    00166   }
    00167
    00168   *this->infos.Append() = ci;
    00169
    00170   /* Incoming data means that we might need to reconsider dependencies */
    00171   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00172     this->CheckDependencyState(*iter);
    00173   }
    00174
    00175   this->OnReceiveContentInfo(ci);
    00176
    00177   return true;
    00178 }
    00179
    00184 void ClientNetworkContentSocketHandler::RequestContentList(ContentType type)
    00185 {
    00186   if (type == CONTENT_TYPE_END) {
    00187     this->RequestContentList(CONTENT_TYPE_BASE_GRAPHICS);
    00188     this->RequestContentList(CONTENT_TYPE_BASE_MUSIC);
    00189     this->RequestContentList(CONTENT_TYPE_BASE_SOUNDS);
    00190     this->RequestContentList(CONTENT_TYPE_SCENARIO);
    00191     this->RequestContentList(CONTENT_TYPE_HEIGHTMAP);
    00192     this->RequestContentList(CONTENT_TYPE_AI);
    00193     this->RequestContentList(CONTENT_TYPE_AI_LIBRARY);
    00194     this->RequestContentList(CONTENT_TYPE_GAME);
    00195     this->RequestContentList(CONTENT_TYPE_GAME_LIBRARY);
    00196     this->RequestContentList(CONTENT_TYPE_NEWGRF);
    00197     return;
    00198   }
    00199
    00200   this->Connect();
    00201
    00202   Packet *p = new Packet(PACKET_CONTENT_CLIENT_INFO_LIST);
    00203   p->Send_uint8 ((byte)type);
    00204   p->Send_uint32(_openttd_newgrf_version);
    00205
    00206   this->SendPacket(p);
    00207 }
    00208
    00214 void ClientNetworkContentSocketHandler::RequestContentList(uint count, const ContentID *content_ids)
    00215 {
    00216   this->Connect();
    00217
    00218   while (count > 0) {
    00219     /* We can "only" send a limited number of IDs in a single packet.
    00220      * A packet begins with the packet size and a byte for the type.
    00221      * Then this packet adds a byte for the content type and a uint16
    00222      * for the count in this packet. The rest of the packet can be
    00223      * used for the IDs. */
    00224     uint p_count = min(count, (SEND_MTU - sizeof(PacketSize) - sizeof(byte) - sizeof(byte) - sizeof(uint16)) / sizeof(uint32));
    00225
    00226     Packet *p = new Packet(PACKET_CONTENT_CLIENT_INFO_ID);
    00227     p->Send_uint16(p_count);
    00228
    00229     for (uint i = 0; i < p_count; i++) {
    00230       p->Send_uint32(content_ids[i]);
    00231     }
    00232
    00233     this->SendPacket(p);
    00234     count -= p_count;
    00235     content_ids += p_count;
    00236   }
    00237 }
    00238
    00244 void ClientNetworkContentSocketHandler::RequestContentList(ContentVector *cv, bool send_md5sum)
    00245 {
    00246   if (cv == NULL) return;
    00247
    00248   this->Connect();
    00249
    00250   /* 20 is sizeof(uint32) + sizeof(md5sum (byte[16])) */
    00251   assert(cv->Length() < 255);
    00252   assert(cv->Length() < (SEND_MTU - sizeof(PacketSize) - sizeof(byte) - sizeof(uint8)) / (send_md5sum ? 20 : sizeof(uint32)));
    00253
    00254   Packet *p = new Packet(send_md5sum ? PACKET_CONTENT_CLIENT_INFO_EXTID_MD5 : PACKET_CONTENT_CLIENT_INFO_EXTID);
    00255   p->Send_uint8(cv->Length());
    00256
    00257   for (ContentIterator iter = cv->Begin(); iter != cv->End(); iter++) {
    00258     const ContentInfo *ci = *iter;
    00259     p->Send_uint8((byte)ci->type);
    00260     p->Send_uint32(ci->unique_id);
    00261     if (!send_md5sum) continue;
    00262
    00263     for (uint j = 0; j < sizeof(ci->md5sum); j++) {
    00264       p->Send_uint8(ci->md5sum[j]);
    00265     }
    00266   }
    00267
    00268   this->SendPacket(p);
    00269
    00270   for (ContentIterator iter = cv->Begin(); iter != cv->End(); iter++) {
    00271     ContentInfo *ci = *iter;
    00272     bool found = false;
    00273     for (ContentIterator iter2 = this->infos.Begin(); iter2 != this->infos.End(); iter2++) {
    00274       ContentInfo *ci2 = *iter2;
    00275       if (ci->type == ci2->type && ci->unique_id == ci2->unique_id &&
    00276           (!send_md5sum || memcmp(ci->md5sum, ci2->md5sum, sizeof(ci->md5sum)) == 0)) {
    00277         found = true;
    00278         break;
    00279       }
    00280     }
    00281     if (!found) {
    00282       *this->infos.Append() = ci;
    00283     } else {
    00284       delete ci;
    00285     }
    00286   }
    00287 }
    00288
    00295 void ClientNetworkContentSocketHandler::DownloadSelectedContent(uint &files, uint &bytes, bool fallback)
    00296 {
    00297   bytes = 0;
    00298
    00299   ContentIDList content;
    00300   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00301     const ContentInfo *ci = *iter;
    00302     if (!ci->IsSelected() || ci->state == ContentInfo::ALREADY_HERE) continue;
    00303
    00304     *content.Append() = ci->id;
    00305     bytes += ci->filesize;
    00306   }
    00307
    00308   files = content.Length();
    00309
    00310   /* If there's nothing to download, do nothing. */
    00311   if (files == 0) return;
    00312
    00313   if (_settings_client.network.no_http_content_downloads || fallback) {
    00314     this->DownloadSelectedContentFallback(content);
    00315   } else {
    00316     this->DownloadSelectedContentHTTP(content);
    00317   }
    00318 }
    00319
    00324 void ClientNetworkContentSocketHandler::DownloadSelectedContentHTTP(const ContentIDList &content)
    00325 {
    00326   uint count = content.Length();
    00327
    00328   /* Allocate memory for the whole request.
    00329    * Requests are "id\nid\n..." (as strings), so assume the maximum ID,
    00330    * which is uint32 so 10 characters long. Then the newlines and
    00331    * multiply that all with the count and then add the '\0'. */
    00332   uint bytes = (10 + 1) * count + 1;
    00333   char *content_request = MallocT<char>(bytes);
    00334   const char *lastof = content_request + bytes - 1;
    00335
    00336   char *p = content_request;
    00337   for (const ContentID *id = content.Begin(); id != content.End(); id++) {
    00338     p += seprintf(p, lastof, "%d\n", *id);
    00339   }
    00340
    00341   this->http_response_index = -1;
    00342
    00343   NetworkAddress address(NETWORK_CONTENT_MIRROR_HOST, NETWORK_CONTENT_MIRROR_PORT);
    00344   new NetworkHTTPContentConnecter(address, this, NETWORK_CONTENT_MIRROR_URL, content_request);
    00345   /* NetworkHTTPContentConnecter takes over freeing of content_request! */
    00346 }
    00347
    00352 void ClientNetworkContentSocketHandler::DownloadSelectedContentFallback(const ContentIDList &content)
    00353 {
    00354   uint count = content.Length();
    00355   const ContentID *content_ids = content.Begin();
    00356   this->Connect();
    00357
    00358   while (count > 0) {
    00359     /* We can "only" send a limited number of IDs in a single packet.
    00360      * A packet begins with the packet size and a byte for the type.
    00361      * Then this packet adds a uint16 for the count in this packet.
    00362      * The rest of the packet can be used for the IDs. */
    00363     uint p_count = min(count, (SEND_MTU - sizeof(PacketSize) - sizeof(byte) - sizeof(uint16)) / sizeof(uint32));
    00364
    00365     Packet *p = new Packet(PACKET_CONTENT_CLIENT_CONTENT);
    00366     p->Send_uint16(p_count);
    00367
    00368     for (uint i = 0; i < p_count; i++) {
    00369       p->Send_uint32(content_ids[i]);
    00370     }
    00371
    00372     this->SendPacket(p);
    00373     count -= p_count;
    00374     content_ids += p_count;
    00375   }
    00376 }
    00377
    00385 static char *GetFullFilename(const ContentInfo *ci, bool compressed)
    00386 {
    00387   Subdirectory dir = GetContentInfoSubDir(ci->type);
    00388   if (dir == NO_DIRECTORY) return NULL;
    00389
    00390   static char buf[MAX_PATH];
    00391   FioGetFullPath(buf, lengthof(buf), SP_AUTODOWNLOAD_DIR, dir, ci->filename);
    00392   strecat(buf, compressed ? ".tar.gz" : ".tar", lastof(buf));
    00393
    00394   return buf;
    00395 }
    00396
    00402 static bool GunzipFile(const ContentInfo *ci)
    00403 {
    00404 #if defined(WITH_ZLIB)
    00405   bool ret = true;
    00406   FILE *ftmp = fopen(GetFullFilename(ci, true), "rb");
    00407   gzFile fin = gzdopen(fileno(ftmp), "rb");
    00408   FILE *fout = fopen(GetFullFilename(ci, false), "wb");
    00409
    00410   if (fin == NULL || fout == NULL) {
    00411     ret = false;
    00412   } else {
    00413     byte buff[8192];
    00414     for (;;) {
    00415       int read = gzread(fin, buff, sizeof(buff));
    00416       if (read == 0) {
    00417         /* If gzread() returns 0, either the end-of-file has been
    00418          * reached or an underlying read error has occurred.
    00419          *
    00420          * gzeof() can't be used, because:
    00421          * 1.2.5 - it is safe, 1 means 'everything was OK'
    00422          * 1.2.3.5, 1.2.4 - 0 or 1 is returned 'randomly'
    00423          * 1.2.3.3 - 1 is returned for truncated archive
    00424          *
    00425          * So we use gzerror(). When proper end of archive
    00426          * has been reached, then:
    00427          * errnum == Z_STREAM_END in 1.2.3.3,
    00428          * errnum == 0 in 1.2.4 and 1.2.5 */
    00429         int errnum;
    00430         gzerror(fin, &errnum);
    00431         if (errnum != 0 && errnum != Z_STREAM_END) ret = false;
    00432         break;
    00433       }
    00434       if (read < 0 || (size_t)read != fwrite(buff, 1, read, fout)) {
    00435         /* If gzread() returns -1, there was an error in archive */
    00436         ret = false;
    00437         break;
    00438       }
    00439       /* DO NOT DO THIS! It will fail to detect broken archive with 1.2.3.3!
    00440        * if (read < sizeof(buff)) break; */
    00441     }
    00442   }
    00443
    00444   if (fin != NULL) {
    00445     /* Closes ftmp too! */
    00446     gzclose(fin);
    00447   } else if (ftmp != NULL) {
    00448     /* In case the gz stream was opened correctly this will
    00449      * be closed by gzclose. */
    00450     fclose(ftmp);
    00451   }
    00452   if (fout != NULL) fclose(fout);
    00453
    00454   return ret;
    00455 #else
    00456   NOT_REACHED();
    00457 #endif /* defined(WITH_ZLIB) */
    00458 }
    00459
    00460 bool ClientNetworkContentSocketHandler::Receive_SERVER_CONTENT(Packet *p)
    00461 {
    00462   if (this->curFile == NULL) {
    00463     delete this->curInfo;
    00464     /* When we haven't opened a file this must be our first packet with metadata. */
    00465     this->curInfo = new ContentInfo;
    00466     this->curInfo->type     = (ContentType)p->Recv_uint8();
    00467     this->curInfo->id       = (ContentID)p->Recv_uint32();
    00468     this->curInfo->filesize = p->Recv_uint32();
    00469     p->Recv_string(this->curInfo->filename, lengthof(this->curInfo->filename));
    00470
    00471     if (!this->BeforeDownload()) {
    00472       this->Close();
    00473       return false;
    00474     }
    00475   } else {
    00476     /* We have a file opened, thus are downloading internal content */
    00477     size_t toRead = (size_t)(p->size - p->pos);
    00478     if (fwrite(p->buffer + p->pos, 1, toRead, this->curFile) != toRead) {
    00479       DeleteWindowById(WC_NETWORK_STATUS_WINDOW, WN_NETWORK_STATUS_WINDOW_CONTENT_DOWNLOAD);
    00480       ShowErrorMessage(STR_CONTENT_ERROR_COULD_NOT_DOWNLOAD, STR_CONTENT_ERROR_COULD_NOT_DOWNLOAD_FILE_NOT_WRITABLE, WL_ERROR);
    00481       this->Close();
    00482       fclose(this->curFile);
    00483       this->curFile = NULL;
    00484
    00485       return false;
    00486     }
    00487
    00488     this->OnDownloadProgress(this->curInfo, (int)toRead);
    00489
    00490     if (toRead == 0) this->AfterDownload();
    00491   }
    00492
    00493   return true;
    00494 }
    00495
    00500 bool ClientNetworkContentSocketHandler::BeforeDownload()
    00501 {
    00502   if (!this->curInfo->IsValid()) {
    00503     delete this->curInfo;
    00504     this->curInfo = NULL;
    00505     return false;
    00506   }
    00507
    00508   if (this->curInfo->filesize != 0) {
    00509     /* The filesize is > 0, so we are going to download it */
    00510     const char *filename = GetFullFilename(this->curInfo, true);
    00511     if (filename == NULL || (this->curFile = fopen(filename, "wb")) == NULL) {
    00512       /* Unless that fails ofcourse... */
    00513       DeleteWindowById(WC_NETWORK_STATUS_WINDOW, WN_NETWORK_STATUS_WINDOW_CONTENT_DOWNLOAD);
    00514       ShowErrorMessage(STR_CONTENT_ERROR_COULD_NOT_DOWNLOAD, STR_CONTENT_ERROR_COULD_NOT_DOWNLOAD_FILE_NOT_WRITABLE, WL_ERROR);
    00515       return false;
    00516     }
    00517   }
    00518   return true;
    00519 }
    00520
    00525 void ClientNetworkContentSocketHandler::AfterDownload()
    00526 {
    00527   /* We read nothing; that's our marker for end-of-stream.
    00528    * Now gunzip the tar and make it known. */
    00529   fclose(this->curFile);
    00530   this->curFile = NULL;
    00531
    00532   if (GunzipFile(this->curInfo)) {
    00533     unlink(GetFullFilename(this->curInfo, true));
    00534
    00535     Subdirectory sd = GetContentInfoSubDir(this->curInfo->type);
    00536     if (sd == NO_DIRECTORY) NOT_REACHED();
    00537
    00538     TarScanner ts;
    00539     ts.AddFile(sd, GetFullFilename(this->curInfo, false));
    00540
    00541     if (this->curInfo->type == CONTENT_TYPE_BASE_MUSIC) {
    00542       /* Music can't be in a tar. So extract the tar! */
    00543       ExtractTar(GetFullFilename(this->curInfo, false), BASESET_DIR);
    00544       unlink(GetFullFilename(this->curInfo, false));
    00545     }
    00546
    00547     this->OnDownloadComplete(this->curInfo->id);
    00548   } else {
    00549     ShowErrorMessage(STR_CONTENT_ERROR_COULD_NOT_EXTRACT, INVALID_STRING_ID, WL_ERROR);
    00550   }
    00551 }
    00552
    00553 /* Also called to just clean up the mess. */
    00554 void ClientNetworkContentSocketHandler::OnFailure()
    00555 {
    00556   /* If we fail, download the rest via the 'old' system. */
    00557   uint files, bytes;
    00558   this->DownloadSelectedContent(files, bytes, true);
    00559
    00560   this->http_response.Reset();
    00561   this->http_response_index = -2;
    00562
    00563   if (this->curFile != NULL) {
    00564     /* Revert the download progress when we are going for the old system. */
    00565     long size = ftell(this->curFile);
    00566     if (size > 0) this->OnDownloadProgress(this->curInfo, (int)-size);
    00567
    00568     fclose(this->curFile);
    00569     this->curFile = NULL;
    00570   }
    00571 }
    00572
    00573 void ClientNetworkContentSocketHandler::OnReceiveData(const char *data, size_t length)
    00574 {
    00575   assert(data == NULL || length != 0);
    00576
    00577   /* Ignore any latent data coming from a connection we closed. */
    00578   if (this->http_response_index == -2) return;
    00579
    00580   if (this->http_response_index == -1) {
    00581     if (data != NULL) {
    00582       /* Append the rest of the response. */
    00583       memcpy(this->http_response.Append((uint)length), data, length);
    00584       return;
    00585     } else {
    00586       /* Make sure the response is properly terminated. */
    00587       *this->http_response.Append() = '\0';
    00588
    00589       /* And prepare for receiving the rest of the data. */
    00590       this->http_response_index = 0;
    00591     }
    00592   }
    00593
    00594   if (data != NULL) {
    00595     /* We have data, so write it to the file. */
    00596     if (fwrite(data, 1, length, this->curFile) != length) {
    00597       /* Writing failed somehow, let try via the old method. */
    00598       this->OnFailure();
    00599     } else {
    00600       /* Just received the data. */
    00601       this->OnDownloadProgress(this->curInfo, (int)length);
    00602     }
    00603     /* Nothing more to do now. */
    00604     return;
    00605   }
    00606
    00607   if (this->curFile != NULL) {
    00608     /* We've finished downloading a file. */
    00609     this->AfterDownload();
    00610   }
    00611
    00612   if ((uint)this->http_response_index >= this->http_response.Length()) {
    00613     /* It's not a real failure, but if there's
    00614      * nothing more to download it helps with
    00615      * cleaning up the stuff we allocated. */
    00616     this->OnFailure();
    00617     return;
    00618   }
    00619
    00620   delete this->curInfo;
    00621   /* When we haven't opened a file this must be our first packet with metadata. */
    00622   this->curInfo = new ContentInfo;
    00623
    00625 #define check_not_null(p) { if ((p) == NULL) { this->OnFailure(); return; } }
    00626
    00627 #define check_and_terminate(p) { check_not_null(p); *(p) = '\0'; }
    00628
    00629   for (;;) {
    00630     char *str = this->http_response.Begin() + this->http_response_index;
    00631     char *p = strchr(str, '\n');
    00632     check_and_terminate(p);
    00633
    00634     /* Update the index for the next one */
    00635     this->http_response_index += (int)strlen(str) + 1;
    00636
    00637     /* Read the ID */
    00638     p = strchr(str, ',');
    00639     check_and_terminate(p);
    00640     this->curInfo->id = (ContentID)atoi(str);
    00641
    00642     /* Read the type */
    00643     str = p + 1;
    00644     p = strchr(str, ',');
    00645     check_and_terminate(p);
    00646     this->curInfo->type = (ContentType)atoi(str);
    00647
    00648     /* Read the file size */
    00649     str = p + 1;
    00650     p = strchr(str, ',');
    00651     check_and_terminate(p);
    00652     this->curInfo->filesize = atoi(str);
    00653
    00654     /* Read the URL */
    00655     str = p + 1;
    00656     /* Is it a fallback URL? If so, just continue with the next one. */
    00657     if (strncmp(str, "ottd", 4) == 0) {
    00658       if ((uint)this->http_response_index >= this->http_response.Length()) {
    00659         /* Have we gone through all lines? */
    00660         this->OnFailure();
    00661         return;
    00662       }
    00663       continue;
    00664     }
    00665
    00666     p = strrchr(str, '/');
    00667     check_not_null(p);
    00668     p++; // Start after the '/'
    00669
    00670     char tmp[MAX_PATH];
    00671     if (strecpy(tmp, p, lastof(tmp)) == lastof(tmp)) {
    00672       this->OnFailure();
    00673       return;
    00674     }
    00675     /* Remove the extension from the string. */
    00676     for (uint i = 0; i < 2; i++) {
    00677       p = strrchr(tmp, '.');
    00678       check_and_terminate(p);
    00679     }
    00680
    00681     /* Copy the string, without extension, to the filename. */
    00682     strecpy(this->curInfo->filename, tmp, lastof(this->curInfo->filename));
    00683
    00684     /* Request the next file. */
    00685     if (!this->BeforeDownload()) {
    00686       this->OnFailure();
    00687       return;
    00688     }
    00689
    00690     NetworkHTTPSocketHandler::Connect(str, this);
    00691     return;
    00692   }
    00693
    00694 #undef check
    00695 #undef check_and_terminate
    00696 }
    00697
    00701 ClientNetworkContentSocketHandler::ClientNetworkContentSocketHandler() :
    00702   NetworkContentSocketHandler(),
    00703   http_response_index(-2),
    00704   curFile(NULL),
    00705   curInfo(NULL),
    00706   isConnecting(false)
    00707 {
    00708 }
    00709
    00711 ClientNetworkContentSocketHandler::~ClientNetworkContentSocketHandler()
    00712 {
    00713   delete this->curInfo;
    00714   if (this->curFile != NULL) fclose(this->curFile);
    00715
    00716   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) delete *iter;
    00717 }
    00718
    00720 class NetworkContentConnecter : TCPConnecter {
    00721 public:
    00726   NetworkContentConnecter(const NetworkAddress &address) : TCPConnecter(address) {}
    00727
    00728   virtual void OnFailure()
    00729   {
    00730     _network_content_client.isConnecting = false;
    00731     _network_content_client.OnConnect(false);
    00732   }
    00733
    00734   virtual void OnConnect(SOCKET s)
    00735   {
    00736     assert(_network_content_client.sock == INVALID_SOCKET);
    00737     _network_content_client.isConnecting = false;
    00738     _network_content_client.sock = s;
    00739     _network_content_client.Reopen();
    00740     _network_content_client.OnConnect(true);
    00741   }
    00742 };
    00743
    00747 void ClientNetworkContentSocketHandler::Connect()
    00748 {
    00749   this->lastActivity = _realtime_tick;
    00750
    00751   if (this->sock != INVALID_SOCKET || this->isConnecting) return;
    00752   this->isConnecting = true;
    00753   new NetworkContentConnecter(NetworkAddress(NETWORK_CONTENT_SERVER_HOST, NETWORK_CONTENT_SERVER_PORT, AF_UNSPEC));
    00754 }
    00755
    00759 void ClientNetworkContentSocketHandler::Close()
    00760 {
    00761   if (this->sock == INVALID_SOCKET) return;
    00762   NetworkContentSocketHandler::Close();
    00763
    00764   this->OnDisconnect();
    00765 }
    00766
    00771 void ClientNetworkContentSocketHandler::SendReceive()
    00772 {
    00773   if (this->sock == INVALID_SOCKET || this->isConnecting) return;
    00774
    00775   if (this->lastActivity + IDLE_TIMEOUT < _realtime_tick) {
    00776     this->Close();
    00777     return;
    00778   }
    00779
    00780   if (this->CanSendReceive()) {
    00781     this->ReceivePackets();
    00782     this->lastActivity = _realtime_tick;
    00783   }
    00784
    00785   this->SendPackets();
    00786 }
    00787
    00792 void ClientNetworkContentSocketHandler::DownloadContentInfo(ContentID cid)
    00793 {
    00794   /* When we tried to download it already, don't try again */
    00795   if (this->requested.Contains(cid)) return;
    00796
    00797   *this->requested.Append() = cid;
    00798   assert(this->requested.Contains(cid));
    00799   this->RequestContentList(1, &cid);
    00800 }
    00801
    00807 ContentInfo *ClientNetworkContentSocketHandler::GetContent(ContentID cid)
    00808 {
    00809   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00810     ContentInfo *ci = *iter;
    00811     if (ci->id == cid) return ci;
    00812   }
    00813   return NULL;
    00814 }
    00815
    00816
    00821 void ClientNetworkContentSocketHandler::Select(ContentID cid)
    00822 {
    00823   ContentInfo *ci = this->GetContent(cid);
    00824   if (ci == NULL || ci->state != ContentInfo::UNSELECTED) return;
    00825
    00826   ci->state = ContentInfo::SELECTED;
    00827   this->CheckDependencyState(ci);
    00828 }
    00829
    00834 void ClientNetworkContentSocketHandler::Unselect(ContentID cid)
    00835 {
    00836   ContentInfo *ci = this->GetContent(cid);
    00837   if (ci == NULL || !ci->IsSelected()) return;
    00838
    00839   ci->state = ContentInfo::UNSELECTED;
    00840   this->CheckDependencyState(ci);
    00841 }
    00842
    00844 void ClientNetworkContentSocketHandler::SelectAll()
    00845 {
    00846   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00847     ContentInfo *ci = *iter;
    00848     if (ci->state == ContentInfo::UNSELECTED) {
    00849       ci->state = ContentInfo::SELECTED;
    00850       this->CheckDependencyState(ci);
    00851     }
    00852   }
    00853 }
    00854
    00856 void ClientNetworkContentSocketHandler::SelectUpgrade()
    00857 {
    00858   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00859     ContentInfo *ci = *iter;
    00860     if (ci->state == ContentInfo::UNSELECTED && ci->upgrade) {
    00861       ci->state = ContentInfo::SELECTED;
    00862       this->CheckDependencyState(ci);
    00863     }
    00864   }
    00865 }
    00866
    00868 void ClientNetworkContentSocketHandler::UnselectAll()
    00869 {
    00870   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00871     ContentInfo *ci = *iter;
    00872     if (ci->IsSelected() && ci->state != ContentInfo::ALREADY_HERE) ci->state = ContentInfo::UNSELECTED;
    00873   }
    00874 }
    00875
    00877 void ClientNetworkContentSocketHandler::ToggleSelectedState(const ContentInfo *ci)
    00878 {
    00879   switch (ci->state) {
    00880     case ContentInfo::SELECTED:
    00881     case ContentInfo::AUTOSELECTED:
    00882       this->Unselect(ci->id);
    00883       break;
    00884
    00885     case ContentInfo::UNSELECTED:
    00886       this->Select(ci->id);
    00887       break;
    00888
    00889     default:
    00890       break;
    00891   }
    00892 }
    00893
    00899 void ClientNetworkContentSocketHandler::ReverseLookupDependency(ConstContentVector &parents, const ContentInfo *child) const
    00900 {
    00901   for (ConstContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00902     const ContentInfo *ci = *iter;
    00903     if (ci == child) continue;
    00904
    00905     for (uint i = 0; i < ci->dependency_count; i++) {
    00906       if (ci->dependencies[i] == child->id) {
    00907         *parents.Append() = ci;
    00908         break;
    00909       }
    00910     }
    00911   }
    00912 }
    00913
    00919 void ClientNetworkContentSocketHandler::ReverseLookupTreeDependency(ConstContentVector &tree, const ContentInfo *child) const
    00920 {
    00921   *tree.Append() = child;
    00922
    00923   /* First find all direct parents. We can't use the "normal" iterator as
    00924    * we are including stuff into the vector and as such the vector's data
    00925    * store can be reallocated (and thus move), which means out iterating
    00926    * pointer gets invalid. So fall back to the indices. */
    00927   for (uint i = 0; i < tree.Length(); i++) {
    00928     ConstContentVector parents;
    00929     this->ReverseLookupDependency(parents, tree[i]);
    00930
    00931     for (ConstContentIterator piter = parents.Begin(); piter != parents.End(); piter++) {
    00932       tree.Include(*piter);
    00933     }
    00934   }
    00935 }
    00936
    00941 void ClientNetworkContentSocketHandler::CheckDependencyState(ContentInfo *ci)
    00942 {
    00943   if (ci->IsSelected() || ci->state == ContentInfo::ALREADY_HERE) {
    00944     /* Selection is easy; just walk all children and set the
    00945      * autoselected state. That way we can see what we automatically
    00946      * selected and thus can unselect when a dependency is removed. */
    00947     for (uint i = 0; i < ci->dependency_count; i++) {
    00948       ContentInfo *c = this->GetContent(ci->dependencies[i]);
    00949       if (c == NULL) {
    00950         this->DownloadContentInfo(ci->dependencies[i]);
    00951       } else if (c->state == ContentInfo::UNSELECTED) {
    00952         c->state = ContentInfo::AUTOSELECTED;
    00953         this->CheckDependencyState(c);
    00954       }
    00955     }
    00956     return;
    00957   }
    00958
    00959   if (ci->state != ContentInfo::UNSELECTED) return;
    00960
    00961   /* For unselection we need to find the parents of us. We need to
    00962    * unselect them. After that we unselect all children that we
    00963    * depend on and are not used as dependency for us, but only when
    00964    * we automatically selected them. */
    00965   ConstContentVector parents;
    00966   this->ReverseLookupDependency(parents, ci);
    00967   for (ConstContentIterator iter = parents.Begin(); iter != parents.End(); iter++) {
    00968     const ContentInfo *c = *iter;
    00969     if (!c->IsSelected()) continue;
    00970
    00971     this->Unselect(c->id);
    00972   }
    00973
    00974   for (uint i = 0; i < ci->dependency_count; i++) {
    00975     const ContentInfo *c = this->GetContent(ci->dependencies[i]);
    00976     if (c == NULL) {
    00977       DownloadContentInfo(ci->dependencies[i]);
    00978       continue;
    00979     }
    00980     if (c->state != ContentInfo::AUTOSELECTED) continue;
    00981
    00982     /* Only unselect when WE are the only parent. */
    00983     parents.Clear();
    00984     this->ReverseLookupDependency(parents, c);
    00985
    00986     /* First check whether anything depends on us */
    00987     int sel_count = 0;
    00988     bool force_selection = false;
    00989     for (ConstContentIterator iter = parents.Begin(); iter != parents.End(); iter++) {
    00990       if ((*iter)->IsSelected()) sel_count++;
    00991       if ((*iter)->state == ContentInfo::SELECTED) force_selection = true;
    00992     }
    00993     if (sel_count == 0) {
    00994       /* Nothing depends on us */
    00995       this->Unselect(c->id);
    00996       continue;
    00997     }
    00998     /* Something manually selected depends directly on us */
    00999     if (force_selection) continue;
    01000
    01001     /* "Flood" search to find all items in the dependency graph*/
    01002     parents.Clear();
    01003     this->ReverseLookupTreeDependency(parents, c);
    01004
    01005     /* Is there anything that is "force" selected?, if so... we're done. */
    01006     for (ConstContentIterator iter = parents.Begin(); iter != parents.End(); iter++) {
    01007       if ((*iter)->state != ContentInfo::SELECTED) continue;
    01008
    01009       force_selection = true;
    01010       break;
    01011     }
    01012
    01013     /* So something depended directly on us */
    01014     if (force_selection) continue;
    01015
    01016     /* Nothing depends on us, mark the whole graph as unselected.
    01017      * After that's done run over them once again to test their children
    01018      * to unselect. Don't do it immediately because it'll do exactly what
    01019      * we're doing now. */
    01020     for (ConstContentIterator iter = parents.Begin(); iter != parents.End(); iter++) {
    01021       const ContentInfo *c = *iter;
    01022       if (c->state == ContentInfo::AUTOSELECTED) this->Unselect(c->id);
    01023     }
    01024     for (ConstContentIterator iter = parents.Begin(); iter != parents.End(); iter++) {
    01025       this->CheckDependencyState(this->GetContent((*iter)->id));
    01026     }
    01027   }
    01028 }
    01029
    01031 void ClientNetworkContentSocketHandler::Clear()
    01032 {
    01033   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) delete *iter;
    01034
    01035   this->infos.Clear();
    01036   this->requested.Clear();
    01037 }
    01038
    01039 /*** CALLBACK ***/
    01040
    01041 void ClientNetworkContentSocketHandler::OnConnect(bool success)
    01042 {
    01043   for (ContentCallback **iter = this->callbacks.Begin(); iter != this->callbacks.End(); /* nothing */) {
    01044     ContentCallback *cb = *iter;
    01045     cb->OnConnect(success);
    01046     if (iter != this->callbacks.End() && *iter == cb) iter++;
    01047   }
    01048 }
    01049
    01050 void ClientNetworkContentSocketHandler::OnDisconnect()
    01051 {
    01052   for (ContentCallback **iter = this->callbacks.Begin(); iter != this->callbacks.End(); /* nothing */) {
    01053     ContentCallback *cb = *iter;
    01054     cb->OnDisconnect();
    01055     if (iter != this->callbacks.End() && *iter == cb) iter++;
    01056   }
    01057 }
    01058
    01059 void ClientNetworkContentSocketHandler::OnReceiveContentInfo(const ContentInfo *ci)
    01060 {
    01061   for (ContentCallback **iter = this->callbacks.Begin(); iter != this->callbacks.End(); /* nothing */) {
    01062     ContentCallback *cb = *iter;
    01063     cb->OnReceiveContentInfo(ci);
    01064     if (iter != this->callbacks.End() && *iter == cb) iter++;
    01065   }
    01066 }
    01067
    01068 void ClientNetworkContentSocketHandler::OnDownloadProgress(const ContentInfo *ci, int bytes)
    01069 {
    01070   for (ContentCallback **iter = this->callbacks.Begin(); iter != this->callbacks.End(); /* nothing */) {
    01071     ContentCallback *cb = *iter;
    01072     cb->OnDownloadProgress(ci, bytes);
    01073     if (iter != this->callbacks.End() && *iter == cb) iter++;
    01074   }
    01075 }
    01076
    01077 void ClientNetworkContentSocketHandler::OnDownloadComplete(ContentID cid)
    01078 {
    01079   ContentInfo *ci = this->GetContent(cid);
    01080   if (ci != NULL) {
    01081     ci->state = ContentInfo::ALREADY_HERE;
    01082   }
    01083
    01084   for (ContentCallback **iter = this->callbacks.Begin(); iter != this->callbacks.End(); /* nothing */) {
    01085     ContentCallback *cb = *iter;
    01086     cb->OnDownloadComplete(cid);
    01087     if (iter != this->callbacks.End() && *iter == cb) iter++;
    01088   }
    01089 }
    01090
    01091 #endif /* ENABLE_NETWORK */