# network_content.cpp

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    00001 /* $Id: network_content.cpp 21898 2011-01-23 11:20:55Z 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 "../base_media_base.h"
    00020 #include "../settings_type.h"
    00021 #include "network_content.h"
    00022
    00023 #include "table/strings.h"
    00024
    00025 #if defined(WITH_ZLIB)
    00026 #include <zlib.h>
    00027 #endif
    00028
    00029 extern bool HasScenario(const ContentInfo *ci, bool md5sum);
    00030 ClientNetworkContentSocketHandler _network_content_client;
    00031
    00033 static bool HasGRFConfig(const ContentInfo *ci, bool md5sum)
    00034 {
    00035   return FindGRFConfig(BSWAP32(ci->unique_id), md5sum ? FGCM_EXACT : FGCM_ANY, md5sum ? ci->md5sum : NULL) != NULL;
    00036 }
    00037
    00045 typedef bool (*HasProc)(const ContentInfo *ci, bool md5sum);
    00046
    00047 DEF_CONTENT_RECEIVE_COMMAND(Client, PACKET_CONTENT_SERVER_INFO)
    00048 {
    00049   ContentInfo *ci = new ContentInfo();
    00050   ci->type     = (ContentType)p->Recv_uint8();
    00051   ci->id       = (ContentID)p->Recv_uint32();
    00052   ci->filesize = p->Recv_uint32();
    00053
    00054   p->Recv_string(ci->name, lengthof(ci->name));
    00055   p->Recv_string(ci->version, lengthof(ci->name));
    00056   p->Recv_string(ci->url, lengthof(ci->url));
    00057   p->Recv_string(ci->description, lengthof(ci->description),  true);
    00058
    00059   ci->unique_id = p->Recv_uint32();
    00060   for (uint j = 0; j < sizeof(ci->md5sum); j++) {
    00061     ci->md5sum[j] = p->Recv_uint8();
    00062   }
    00063
    00064   ci->dependency_count = p->Recv_uint8();
    00065   ci->dependencies = MallocT<ContentID>(ci->dependency_count);
    00066   for (uint i = 0; i < ci->dependency_count; i++) ci->dependencies[i] = (ContentID)p->Recv_uint32();
    00067
    00068   ci->tag_count = p->Recv_uint8();
    00069   ci->tags = MallocT<char[32]>(ci->tag_count);
    00070   for (uint i = 0; i < ci->tag_count; i++) p->Recv_string(ci->tags[i], lengthof(*ci->tags));
    00071
    00072   if (!ci->IsValid()) {
    00073     delete ci;
    00074     this->Close();
    00075     return false;
    00076   }
    00077
    00078   /* Find the appropriate check function */
    00079   HasProc proc = NULL;
    00080   switch (ci->type) {
    00081     case CONTENT_TYPE_NEWGRF:
    00082       proc = HasGRFConfig;
    00083       break;
    00084
    00085     case CONTENT_TYPE_BASE_GRAPHICS:
    00086       proc = BaseGraphics::HasSet;
    00087       break;
    00088
    00089     case CONTENT_TYPE_BASE_MUSIC:
    00090       proc = BaseMusic::HasSet;
    00091       break;
    00092
    00093     case CONTENT_TYPE_BASE_SOUNDS:
    00094       proc = BaseSounds::HasSet;
    00095       break;
    00096
    00097     case CONTENT_TYPE_AI:
    00098     case CONTENT_TYPE_AI_LIBRARY:
    00099       proc = AI::HasAI; break;
    00100       break;
    00101
    00102     case CONTENT_TYPE_SCENARIO:
    00103     case CONTENT_TYPE_HEIGHTMAP:
    00104       proc = HasScenario;
    00105       break;
    00106
    00107     default:
    00108       break;
    00109   }
    00110
    00111   if (proc != NULL) {
    00112     if (proc(ci, true)) {
    00113       ci->state = ContentInfo::ALREADY_HERE;
    00114     } else {
    00115       ci->state = ContentInfo::UNSELECTED;
    00116       if (proc(ci, false)) ci->upgrade = true;
    00117     }
    00118   } else {
    00119     ci->state = ContentInfo::UNSELECTED;
    00120   }
    00121
    00122   /* Something we don't have and has filesize 0 does not exist in te system */
    00123   if (ci->state == ContentInfo::UNSELECTED && ci->filesize == 0) ci->state = ContentInfo::DOES_NOT_EXIST;
    00124
    00125   /* Do we already have a stub for this? */
    00126   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00127     ContentInfo *ici = *iter;
    00128     if (ici->type == ci->type && ici->unique_id == ci->unique_id &&
    00129         memcmp(ci->md5sum, ici->md5sum, sizeof(ci->md5sum)) == 0) {
    00130       /* Preserve the name if possible */
    00131       if (StrEmpty(ci->name)) strecpy(ci->name, ici->name, lastof(ci->name));
    00132       if (ici->IsSelected()) ci->state = ici->state;
    00133
    00134       /*
    00135        * As ici might be selected by the content window we cannot delete that.
    00136        * However, we want to keep most of the values of ci, except the values
    00137        * we (just) already preserved.
    00138        * So transfer data and ownership of allocated memory from ci to ici.
    00139        */
    00140       ici->TransferFrom(ci);
    00141       delete ci;
    00142
    00143       this->OnReceiveContentInfo(ici);
    00144       return true;
    00145     }
    00146   }
    00147
    00148   /* Missing content info? Don't list it */
    00149   if (ci->filesize == 0) {
    00150     delete ci;
    00151     return true;
    00152   }
    00153
    00154   *this->infos.Append() = ci;
    00155
    00156   /* Incoming data means that we might need to reconsider dependencies */
    00157   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00158     this->CheckDependencyState(*iter);
    00159   }
    00160
    00161   this->OnReceiveContentInfo(ci);
    00162
    00163   return true;
    00164 }
    00165
    00166 void ClientNetworkContentSocketHandler::RequestContentList(ContentType type)
    00167 {
    00168   if (type == CONTENT_TYPE_END) {
    00169     this->RequestContentList(CONTENT_TYPE_BASE_GRAPHICS);
    00170     this->RequestContentList(CONTENT_TYPE_BASE_MUSIC);
    00171     this->RequestContentList(CONTENT_TYPE_BASE_SOUNDS);
    00172     this->RequestContentList(CONTENT_TYPE_SCENARIO);
    00173     this->RequestContentList(CONTENT_TYPE_HEIGHTMAP);
    00174 #ifdef ENABLE_AI
    00175     this->RequestContentList(CONTENT_TYPE_AI);
    00176     this->RequestContentList(CONTENT_TYPE_AI_LIBRARY);
    00177 #endif /* ENABLE_AI */
    00178     this->RequestContentList(CONTENT_TYPE_NEWGRF);
    00179     return;
    00180   }
    00181
    00182   this->Connect();
    00183
    00184   Packet *p = new Packet(PACKET_CONTENT_CLIENT_INFO_LIST);
    00185   p->Send_uint8 ((byte)type);
    00186   p->Send_uint32(_openttd_newgrf_version);
    00187
    00188   this->SendPacket(p);
    00189 }
    00190
    00191 void ClientNetworkContentSocketHandler::RequestContentList(uint count, const ContentID *content_ids)
    00192 {
    00193   this->Connect();
    00194
    00195   while (count > 0) {
    00196     /* We can "only" send a limited number of IDs in a single packet.
    00197      * A packet begins with the packet size and a byte for the type.
    00198      * Then this packet adds a byte for the content type and a uint16
    00199      * for the count in this packet. The rest of the packet can be
    00200      * used for the IDs. */
    00201     uint p_count = min(count, (SEND_MTU - sizeof(PacketSize) - sizeof(byte) - sizeof(byte) - sizeof(uint16)) / sizeof(uint32));
    00202
    00203     Packet *p = new Packet(PACKET_CONTENT_CLIENT_INFO_ID);
    00204     p->Send_uint16(p_count);
    00205
    00206     for (uint i = 0; i < p_count; i++) {
    00207       p->Send_uint32(content_ids[i]);
    00208     }
    00209
    00210     this->SendPacket(p);
    00211     count -= p_count;
    00212     content_ids += p_count;
    00213   }
    00214 }
    00215
    00216 void ClientNetworkContentSocketHandler::RequestContentList(ContentVector *cv, bool send_md5sum)
    00217 {
    00218   if (cv == NULL) return;
    00219
    00220   this->Connect();
    00221
    00222   /* 20 is sizeof(uint32) + sizeof(md5sum (byte[16])) */
    00223   assert(cv->Length() < 255);
    00224   assert(cv->Length() < (SEND_MTU - sizeof(PacketSize) - sizeof(byte) - sizeof(uint8)) / (send_md5sum ? 20 : sizeof(uint32)));
    00225
    00226   Packet *p = new Packet(send_md5sum ? PACKET_CONTENT_CLIENT_INFO_EXTID_MD5 : PACKET_CONTENT_CLIENT_INFO_EXTID);
    00227   p->Send_uint8(cv->Length());
    00228
    00229   for (ContentIterator iter = cv->Begin(); iter != cv->End(); iter++) {
    00230     const ContentInfo *ci = *iter;
    00231     p->Send_uint8((byte)ci->type);
    00232     p->Send_uint32(ci->unique_id);
    00233     if (!send_md5sum) continue;
    00234
    00235     for (uint j = 0; j < sizeof(ci->md5sum); j++) {
    00236       p->Send_uint8(ci->md5sum[j]);
    00237     }
    00238   }
    00239
    00240   this->SendPacket(p);
    00241
    00242   for (ContentIterator iter = cv->Begin(); iter != cv->End(); iter++) {
    00243     ContentInfo *ci = *iter;
    00244     bool found = false;
    00245     for (ContentIterator iter2 = this->infos.Begin(); iter2 != this->infos.End(); iter2++) {
    00246       ContentInfo *ci2 = *iter2;
    00247       if (ci->type == ci2->type && ci->unique_id == ci2->unique_id &&
    00248           (!send_md5sum || memcmp(ci->md5sum, ci2->md5sum, sizeof(ci->md5sum)) == 0)) {
    00249         found = true;
    00250         break;
    00251       }
    00252     }
    00253     if (!found) {
    00254       *this->infos.Append() = ci;
    00255     } else {
    00256       delete ci;
    00257     }
    00258   }
    00259 }
    00260
    00261 void ClientNetworkContentSocketHandler::DownloadSelectedContent(uint &files, uint &bytes, bool fallback)
    00262 {
    00263   bytes = 0;
    00264
    00265   ContentIDList content;
    00266   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00267     const ContentInfo *ci = *iter;
    00268     if (!ci->IsSelected() || ci->state == ContentInfo::ALREADY_HERE) continue;
    00269
    00270     *content.Append() = ci->id;
    00271     bytes += ci->filesize;
    00272   }
    00273
    00274   files = content.Length();
    00275
    00276   /* If there's nothing to download, do nothing. */
    00277   if (files == 0) return;
    00278
    00279   if (_settings_client.network.no_http_content_downloads || fallback) {
    00280     this->DownloadSelectedContentFallback(content);
    00281   } else {
    00282     this->DownloadSelectedContentHTTP(content);
    00283   }
    00284 }
    00285
    00286 void ClientNetworkContentSocketHandler::DownloadSelectedContentHTTP(const ContentIDList &content)
    00287 {
    00288   uint count = content.Length();
    00289
    00290   /* Allocate memory for the whole request.
    00291    * Requests are "id\nid\n..." (as strings), so assume the maximum ID,
    00292    * which is uint32 so 10 characters long. Then the newlines and
    00293    * multiply that all with the count and then add the '\0'. */
    00294   uint bytes = (10 + 1) * count + 1;
    00295   char *content_request = MallocT<char>(bytes);
    00296   const char *lastof = content_request + bytes - 1;
    00297
    00298   char *p = content_request;
    00299   for (const ContentID *id = content.Begin(); id != content.End(); id++) {
    00300     p += seprintf(p, lastof, "%d\n", *id);
    00301   }
    00302
    00303   this->http_response_index = -1;
    00304
    00305   NetworkAddress address(NETWORK_CONTENT_MIRROR_HOST, NETWORK_CONTENT_MIRROR_PORT);
    00306   new NetworkHTTPContentConnecter(address, this, NETWORK_CONTENT_MIRROR_URL, content_request);
    00307   /* NetworkHTTPContentConnecter takes over freeing of content_request! */
    00308 }
    00309
    00310 void ClientNetworkContentSocketHandler::DownloadSelectedContentFallback(const ContentIDList &content)
    00311 {
    00312   uint count = content.Length();
    00313   const ContentID *content_ids = content.Begin();
    00314   this->Connect();
    00315
    00316   while (count > 0) {
    00317     /* We can "only" send a limited number of IDs in a single packet.
    00318      * A packet begins with the packet size and a byte for the type.
    00319      * Then this packet adds a uint16 for the count in this packet.
    00320      * The rest of the packet can be used for the IDs. */
    00321     uint p_count = min(count, (SEND_MTU - sizeof(PacketSize) - sizeof(byte) - sizeof(uint16)) / sizeof(uint32));
    00322
    00323     Packet *p = new Packet(PACKET_CONTENT_CLIENT_CONTENT);
    00324     p->Send_uint16(p_count);
    00325
    00326     for (uint i = 0; i < p_count; i++) {
    00327       p->Send_uint32(content_ids[i]);
    00328     }
    00329
    00330     this->SendPacket(p);
    00331     count -= p_count;
    00332     content_ids += p_count;
    00333   }
    00334 }
    00335
    00343 static char *GetFullFilename(const ContentInfo *ci, bool compressed)
    00344 {
    00345   Subdirectory dir;
    00346   switch (ci->type) {
    00347     default: return NULL;
    00348     case CONTENT_TYPE_BASE_GRAPHICS: dir = DATA_DIR;       break;
    00349     case CONTENT_TYPE_BASE_MUSIC:    dir = GM_DIR;         break;
    00350     case CONTENT_TYPE_BASE_SOUNDS:   dir = DATA_DIR;       break;
    00351     case CONTENT_TYPE_NEWGRF:        dir = DATA_DIR;       break;
    00352     case CONTENT_TYPE_AI:            dir = AI_DIR;         break;
    00353     case CONTENT_TYPE_AI_LIBRARY:    dir = AI_LIBRARY_DIR; break;
    00354     case CONTENT_TYPE_SCENARIO:      dir = SCENARIO_DIR;   break;
    00355     case CONTENT_TYPE_HEIGHTMAP:     dir = HEIGHTMAP_DIR;  break;
    00356   }
    00357
    00358   static char buf[MAX_PATH];
    00359   FioGetFullPath(buf, lengthof(buf), SP_AUTODOWNLOAD_DIR, dir, ci->filename);
    00360   strecat(buf, compressed ? ".tar.gz" : ".tar", lastof(buf));
    00361
    00362   return buf;
    00363 }
    00364
    00370 static bool GunzipFile(const ContentInfo *ci)
    00371 {
    00372 #if defined(WITH_ZLIB)
    00373   bool ret = true;
    00374   FILE *ftmp = fopen(GetFullFilename(ci, true), "rb");
    00375   gzFile fin = gzdopen(fileno(ftmp), "rb");
    00376   FILE *fout = fopen(GetFullFilename(ci, false), "wb");
    00377
    00378   if (fin == NULL || fout == NULL) {
    00379     ret = false;
    00380   } else {
    00381     byte buff[8192];
    00382     while (1) {
    00383       int read = gzread(fin, buff, sizeof(buff));
    00384       if (read == 0) {
    00385         /* If gzread() returns 0, either the end-of-file has been
    00386          * reached or an underlying read error has occurred.
    00387          *
    00388          * gzeof() can't be used, because:
    00389          * 1.2.5 - it is safe, 1 means 'everything was OK'
    00390          * 1.2.3.5, 1.2.4 - 0 or 1 is returned 'randomly'
    00391          * 1.2.3.3 - 1 is returned for truncated archive
    00392          *
    00393          * So we use gzerror(). When proper end of archive
    00394          * has been reached, then:
    00395          * errnum == Z_STREAM_END in 1.2.3.3,
    00396          * errnum == 0 in 1.2.4 and 1.2.5 */
    00397         int errnum;
    00398         gzerror(fin, &errnum);
    00399         if (errnum != 0 && errnum != Z_STREAM_END) ret = false;
    00400         break;
    00401       }
    00402       if (read < 0 || (size_t)read != fwrite(buff, 1, read, fout)) {
    00403         /* If gzread() returns -1, there was an error in archive */
    00404         ret = false;
    00405         break;
    00406       }
    00407       /* DO NOT DO THIS! It will fail to detect broken archive with 1.2.3.3!
    00408        * if (read < sizeof(buff)) break; */
    00409     }
    00410   }
    00411
    00412   if (fin != NULL) {
    00413     /* Closes ftmp too! */
    00414     gzclose(fin);
    00415   } else if (ftmp != NULL) {
    00416     /* In case the gz stream was opened correctly this will
    00417      * be closed by gzclose. */
    00418     fclose(ftmp);
    00419   }
    00420   if (fout != NULL) fclose(fout);
    00421
    00422   return ret;
    00423 #else
    00424   NOT_REACHED();
    00425 #endif /* defined(WITH_ZLIB) */
    00426 }
    00427
    00428 DEF_CONTENT_RECEIVE_COMMAND(Client, PACKET_CONTENT_SERVER_CONTENT)
    00429 {
    00430   if (this->curFile == NULL) {
    00431     delete this->curInfo;
    00432     /* When we haven't opened a file this must be our first packet with metadata. */
    00433     this->curInfo = new ContentInfo;
    00434     this->curInfo->type     = (ContentType)p->Recv_uint8();
    00435     this->curInfo->id       = (ContentID)p->Recv_uint32();
    00436     this->curInfo->filesize = p->Recv_uint32();
    00437     p->Recv_string(this->curInfo->filename, lengthof(this->curInfo->filename));
    00438
    00439     if (!this->BeforeDownload()) {
    00440       this->Close();
    00441       return false;
    00442     }
    00443   } else {
    00444     /* We have a file opened, thus are downloading internal content */
    00445     size_t toRead = (size_t)(p->size - p->pos);
    00446     if (fwrite(p->buffer + p->pos, 1, toRead, this->curFile) != toRead) {
    00447       DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);
    00448       ShowErrorMessage(STR_CONTENT_ERROR_COULD_NOT_DOWNLOAD, STR_CONTENT_ERROR_COULD_NOT_DOWNLOAD_FILE_NOT_WRITABLE, WL_ERROR);
    00449       this->Close();
    00450       fclose(this->curFile);
    00451       this->curFile = NULL;
    00452
    00453       return false;
    00454     }
    00455
    00456     this->OnDownloadProgress(this->curInfo, (uint)toRead);
    00457
    00458     if (toRead == 0) this->AfterDownload();
    00459   }
    00460
    00461   return true;
    00462 }
    00463
    00468 bool ClientNetworkContentSocketHandler::BeforeDownload()
    00469 {
    00470   if (!this->curInfo->IsValid()) {
    00471     delete this->curInfo;
    00472     this->curInfo = NULL;
    00473     return false;
    00474   }
    00475
    00476   if (this->curInfo->filesize != 0) {
    00477     /* The filesize is > 0, so we are going to download it */
    00478     const char *filename = GetFullFilename(this->curInfo, true);
    00479     if (filename == NULL || (this->curFile = fopen(filename, "wb")) == NULL) {
    00480       /* Unless that fails ofcourse... */
    00481       DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);
    00482       ShowErrorMessage(STR_CONTENT_ERROR_COULD_NOT_DOWNLOAD, STR_CONTENT_ERROR_COULD_NOT_DOWNLOAD_FILE_NOT_WRITABLE, WL_ERROR);
    00483       return false;
    00484     }
    00485   }
    00486   return true;
    00487 }
    00488
    00493 void ClientNetworkContentSocketHandler::AfterDownload()
    00494 {
    00495   /* We read nothing; that's our marker for end-of-stream.
    00496    * Now gunzip the tar and make it known. */
    00497   fclose(this->curFile);
    00498   this->curFile = NULL;
    00499
    00500   if (GunzipFile(this->curInfo)) {
    00501     unlink(GetFullFilename(this->curInfo, true));
    00502
    00503     TarScanner ts;
    00504     ts.AddFile(GetFullFilename(this->curInfo, false), 0);
    00505
    00506     if (this->curInfo->type == CONTENT_TYPE_BASE_MUSIC) {
    00507       /* Music can't be in a tar. So extract the tar! */
    00508       ExtractTar(GetFullFilename(this->curInfo, false));
    00509       unlink(GetFullFilename(this->curInfo, false));
    00510     }
    00511
    00512     this->OnDownloadComplete(this->curInfo->id);
    00513   } else {
    00514     ShowErrorMessage(STR_CONTENT_ERROR_COULD_NOT_EXTRACT, INVALID_STRING_ID, WL_ERROR);
    00515   }
    00516 }
    00517
    00518 /* Also called to just clean up the mess. */
    00519 void ClientNetworkContentSocketHandler::OnFailure()
    00520 {
    00521   /* If we fail, download the rest via the 'old' system. */
    00522   uint files, bytes;
    00523   this->DownloadSelectedContent(files, bytes, true);
    00524
    00525   this->http_response.Reset();
    00526   this->http_response_index = -2;
    00527
    00528   if (this->curFile != NULL) {
    00529     fclose(this->curFile);
    00530     this->curFile = NULL;
    00531   }
    00532 }
    00533
    00534 void ClientNetworkContentSocketHandler::OnReceiveData(const char *data, size_t length)
    00535 {
    00536   assert(data == NULL || length != 0);
    00537
    00538   /* Ignore any latent data coming from a connection we closed. */
    00539   if (this->http_response_index == -2) return;
    00540
    00541   if (this->http_response_index == -1) {
    00542     if (data != NULL) {
    00543       /* Append the rest of the response. */
    00544       memcpy(this->http_response.Append((uint)length), data, length);
    00545       return;
    00546     } else {
    00547       /* Make sure the response is properly terminated. */
    00548       *this->http_response.Append() = '\0';
    00549
    00550       /* And prepare for receiving the rest of the data. */
    00551       this->http_response_index = 0;
    00552     }
    00553   }
    00554
    00555   if (data != NULL) {
    00556     /* We have data, so write it to the file. */
    00557     if (fwrite(data, 1, length, this->curFile) != length) {
    00558       /* Writing failed somehow, let try via the old method. */
    00559       this->OnFailure();
    00560     } else {
    00561       /* Just received the data. */
    00562       this->OnDownloadProgress(this->curInfo, (uint)length);
    00563     }
    00564     /* Nothing more to do now. */
    00565     return;
    00566   }
    00567
    00568   if (this->curFile != NULL) {
    00569     /* We've finished downloading a file. */
    00570     this->AfterDownload();
    00571   }
    00572
    00573   if ((uint)this->http_response_index >= this->http_response.Length()) {
    00574     /* It's not a real failure, but if there's
    00575      * nothing more to download it helps with
    00576      * cleaning up the stuff we allocated. */
    00577     this->OnFailure();
    00578     return;
    00579   }
    00580
    00581   delete this->curInfo;
    00582   /* When we haven't opened a file this must be our first packet with metadata. */
    00583   this->curInfo = new ContentInfo;
    00584
    00586 #define check_not_null(p) { if ((p) == NULL) { this->OnFailure(); return; } }
    00587
    00588 #define check_and_terminate(p) { check_not_null(p); *(p) = '\0'; }
    00589
    00590   for (;;) {
    00591     char *str = this->http_response.Begin() + this->http_response_index;
    00592     char *p = strchr(str, '\n');
    00593     check_and_terminate(p);
    00594
    00595     /* Update the index for the next one */
    00596     this->http_response_index += (int)strlen(str) + 1;
    00597
    00598     /* Read the ID */
    00599     p = strchr(str, ',');
    00600     check_and_terminate(p);
    00601     this->curInfo->id = (ContentID)atoi(str);
    00602
    00603     /* Read the type */
    00604     str = p + 1;
    00605     p = strchr(str, ',');
    00606     check_and_terminate(p);
    00607     this->curInfo->type = (ContentType)atoi(str);
    00608
    00609     /* Read the file size */
    00610     str = p + 1;
    00611     p = strchr(str, ',');
    00612     check_and_terminate(p);
    00613     this->curInfo->filesize = atoi(str);
    00614
    00615     /* Read the URL */
    00616     str = p + 1;
    00617     /* Is it a fallback URL? If so, just continue with the next one. */
    00618     if (strncmp(str, "ottd", 4) == 0) {
    00619       if ((uint)this->http_response_index >= this->http_response.Length()) {
    00620         /* Have we gone through all lines? */
    00621         this->OnFailure();
    00622         return;
    00623       }
    00624       continue;
    00625     }
    00626
    00627     p = strrchr(str, '/');
    00628     check_not_null(p);
    00629     p++; // Start after the '/'
    00630
    00631     char tmp[MAX_PATH];
    00632     if (strecpy(tmp, p, lastof(tmp)) == lastof(tmp)) {
    00633       this->OnFailure();
    00634       return;
    00635     }
    00636     /* Remove the extension from the string. */
    00637     for (uint i = 0; i < 2; i++) {
    00638       p = strrchr(tmp, '.');
    00639       check_and_terminate(p);
    00640     }
    00641
    00642     /* Copy the string, without extension, to the filename. */
    00643     strecpy(this->curInfo->filename, tmp, lastof(this->curInfo->filename));
    00644
    00645     /* Request the next file. */
    00646     if (!this->BeforeDownload()) {
    00647       this->OnFailure();
    00648       return;
    00649     }
    00650
    00651     NetworkHTTPSocketHandler::Connect(str, this);
    00652     return;
    00653   }
    00654
    00655 #undef check
    00656 #undef check_and_terminate
    00657 }
    00658
    00664 ClientNetworkContentSocketHandler::ClientNetworkContentSocketHandler() :
    00665   NetworkContentSocketHandler(),
    00666   http_response_index(-2),
    00667   curFile(NULL),
    00668   curInfo(NULL),
    00669   isConnecting(false)
    00670 {
    00671 }
    00672
    00674 ClientNetworkContentSocketHandler::~ClientNetworkContentSocketHandler()
    00675 {
    00676   delete this->curInfo;
    00677   if (this->curFile != NULL) fclose(this->curFile);
    00678
    00679   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) delete *iter;
    00680 }
    00681
    00682 class NetworkContentConnecter : TCPConnecter {
    00683 public:
    00684   NetworkContentConnecter(const NetworkAddress &address) : TCPConnecter(address) {}
    00685
    00686   virtual void OnFailure()
    00687   {
    00688     _network_content_client.isConnecting = false;
    00689     _network_content_client.OnConnect(false);
    00690   }
    00691
    00692   virtual void OnConnect(SOCKET s)
    00693   {
    00694     assert(_network_content_client.sock == INVALID_SOCKET);
    00695     _network_content_client.isConnecting = false;
    00696     _network_content_client.sock = s;
    00697     _network_content_client.Reopen();
    00698     _network_content_client.OnConnect(true);
    00699   }
    00700 };
    00701
    00705 void ClientNetworkContentSocketHandler::Connect()
    00706 {
    00707   this->lastActivity = _realtime_tick;
    00708
    00709   if (this->sock != INVALID_SOCKET || this->isConnecting) return;
    00710   this->isConnecting = true;
    00711   new NetworkContentConnecter(NetworkAddress(NETWORK_CONTENT_SERVER_HOST, NETWORK_CONTENT_SERVER_PORT, AF_UNSPEC));
    00712 }
    00713
    00717 void ClientNetworkContentSocketHandler::Close()
    00718 {
    00719   if (this->sock == INVALID_SOCKET) return;
    00720   NetworkContentSocketHandler::Close();
    00721
    00722   this->OnDisconnect();
    00723 }
    00724
    00729 void ClientNetworkContentSocketHandler::SendReceive()
    00730 {
    00731   if (this->sock == INVALID_SOCKET || this->isConnecting) return;
    00732
    00733   if (this->lastActivity + IDLE_TIMEOUT < _realtime_tick) {
    00734     this->Close();
    00735     return;
    00736   }
    00737
    00738   if (this->CanSendReceive()) {
    00739     this->ReceivePackets();
    00740     this->lastActivity = _realtime_tick;
    00741   }
    00742
    00743   this->SendPackets();
    00744 }
    00745
    00750 void ClientNetworkContentSocketHandler::DownloadContentInfo(ContentID cid)
    00751 {
    00752   /* When we tried to download it already, don't try again */
    00753   if (this->requested.Contains(cid)) return;
    00754
    00755   *this->requested.Append() = cid;
    00756   assert(this->requested.Contains(cid));
    00757   this->RequestContentList(1, &cid);
    00758 }
    00759
    00765 ContentInfo *ClientNetworkContentSocketHandler::GetContent(ContentID cid)
    00766 {
    00767   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00768     ContentInfo *ci = *iter;
    00769     if (ci->id == cid) return ci;
    00770   }
    00771   return NULL;
    00772 }
    00773
    00774
    00779 void ClientNetworkContentSocketHandler::Select(ContentID cid)
    00780 {
    00781   ContentInfo *ci = this->GetContent(cid);
    00782   if (ci == NULL || ci->state != ContentInfo::UNSELECTED) return;
    00783
    00784   ci->state = ContentInfo::SELECTED;
    00785   this->CheckDependencyState(ci);
    00786 }
    00787
    00792 void ClientNetworkContentSocketHandler::Unselect(ContentID cid)
    00793 {
    00794   ContentInfo *ci = this->GetContent(cid);
    00795   if (ci == NULL || !ci->IsSelected()) return;
    00796
    00797   ci->state = ContentInfo::UNSELECTED;
    00798   this->CheckDependencyState(ci);
    00799 }
    00800
    00802 void ClientNetworkContentSocketHandler::SelectAll()
    00803 {
    00804   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00805     ContentInfo *ci = *iter;
    00806     if (ci->state == ContentInfo::UNSELECTED) {
    00807       ci->state = ContentInfo::SELECTED;
    00808       this->CheckDependencyState(ci);
    00809     }
    00810   }
    00811 }
    00812
    00814 void ClientNetworkContentSocketHandler::SelectUpgrade()
    00815 {
    00816   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00817     ContentInfo *ci = *iter;
    00818     if (ci->state == ContentInfo::UNSELECTED && ci->upgrade) {
    00819       ci->state = ContentInfo::SELECTED;
    00820       this->CheckDependencyState(ci);
    00821     }
    00822   }
    00823 }
    00824
    00826 void ClientNetworkContentSocketHandler::UnselectAll()
    00827 {
    00828   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00829     ContentInfo *ci = *iter;
    00830     if (ci->IsSelected() && ci->state != ContentInfo::ALREADY_HERE) ci->state = ContentInfo::UNSELECTED;
    00831   }
    00832 }
    00833
    00835 void ClientNetworkContentSocketHandler::ToggleSelectedState(const ContentInfo *ci)
    00836 {
    00837   switch (ci->state) {
    00838     case ContentInfo::SELECTED:
    00839     case ContentInfo::AUTOSELECTED:
    00840       this->Unselect(ci->id);
    00841       break;
    00842
    00843     case ContentInfo::UNSELECTED:
    00844       this->Select(ci->id);
    00845       break;
    00846
    00847     default:
    00848       break;
    00849   }
    00850 }
    00851
    00857 void ClientNetworkContentSocketHandler::ReverseLookupDependency(ConstContentVector &parents, const ContentInfo *child) const
    00858 {
    00859   for (ConstContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
    00860     const ContentInfo *ci = *iter;
    00861     if (ci == child) continue;
    00862
    00863     for (uint i = 0; i < ci->dependency_count; i++) {
    00864       if (ci->dependencies[i] == child->id) {
    00865         *parents.Append() = ci;
    00866         break;
    00867       }
    00868     }
    00869   }
    00870 }
    00871
    00877 void ClientNetworkContentSocketHandler::ReverseLookupTreeDependency(ConstContentVector &tree, const ContentInfo *child) const
    00878 {
    00879   *tree.Append() = child;
    00880
    00881   /* First find all direct parents. We can't use the "normal" iterator as
    00882    * we are including stuff into the vector and as such the vector's data
    00883    * store can be reallocated (and thus move), which means out iterating
    00884    * pointer gets invalid. So fall back to the indices. */
    00885   for (uint i = 0; i < tree.Length(); i++) {
    00886     ConstContentVector parents;
    00887     this->ReverseLookupDependency(parents, tree[i]);
    00888
    00889     for (ConstContentIterator piter = parents.Begin(); piter != parents.End(); piter++) {
    00890       tree.Include(*piter);
    00891     }
    00892   }
    00893 }
    00894
    00899 void ClientNetworkContentSocketHandler::CheckDependencyState(ContentInfo *ci)
    00900 {
    00901   if (ci->IsSelected() || ci->state == ContentInfo::ALREADY_HERE) {
    00902     /* Selection is easy; just walk all children and set the
    00903      * autoselected state. That way we can see what we automatically
    00904      * selected and thus can unselect when a dependency is removed. */
    00905     for (uint i = 0; i < ci->dependency_count; i++) {
    00906       ContentInfo *c = this->GetContent(ci->dependencies[i]);
    00907       if (c == NULL) {
    00908         this->DownloadContentInfo(ci->dependencies[i]);
    00909       } else if (c->state == ContentInfo::UNSELECTED) {
    00910         c->state = ContentInfo::AUTOSELECTED;
    00911         this->CheckDependencyState(c);
    00912       }
    00913     }
    00914     return;
    00915   }
    00916
    00917   if (ci->state != ContentInfo::UNSELECTED) return;
    00918
    00919   /* For unselection we need to find the parents of us. We need to
    00920    * unselect them. After that we unselect all children that we
    00921    * depend on and are not used as dependency for us, but only when
    00922    * we automatically selected them. */
    00923   ConstContentVector parents;
    00924   this->ReverseLookupDependency(parents, ci);
    00925   for (ConstContentIterator iter = parents.Begin(); iter != parents.End(); iter++) {
    00926     const ContentInfo *c = *iter;
    00927     if (!c->IsSelected()) continue;
    00928
    00929     this->Unselect(c->id);
    00930   }
    00931
    00932   for (uint i = 0; i < ci->dependency_count; i++) {
    00933     const ContentInfo *c = this->GetContent(ci->dependencies[i]);
    00934     if (c == NULL) {
    00935       DownloadContentInfo(ci->dependencies[i]);
    00936       continue;
    00937     }
    00938     if (c->state != ContentInfo::AUTOSELECTED) continue;
    00939
    00940     /* Only unselect when WE are the only parent. */
    00941     parents.Clear();
    00942     this->ReverseLookupDependency(parents, c);
    00943
    00944     /* First check whether anything depends on us */
    00945     int sel_count = 0;
    00946     bool force_selection = false;
    00947     for (ConstContentIterator iter = parents.Begin(); iter != parents.End(); iter++) {
    00948       if ((*iter)->IsSelected()) sel_count++;
    00949       if ((*iter)->state == ContentInfo::SELECTED) force_selection = true;
    00950     }
    00951     if (sel_count == 0) {
    00952       /* Nothing depends on us */
    00953       this->Unselect(c->id);
    00954       continue;
    00955     }
    00956     /* Something manually selected depends directly on us */
    00957     if (force_selection) continue;
    00958
    00959     /* "Flood" search to find all items in the dependency graph*/
    00960     parents.Clear();
    00961     this->ReverseLookupTreeDependency(parents, c);
    00962
    00963     /* Is there anything that is "force" selected?, if so... we're done. */
    00964     for (ConstContentIterator iter = parents.Begin(); iter != parents.End(); iter++) {
    00965       if ((*iter)->state != ContentInfo::SELECTED) continue;
    00966
    00967       force_selection = true;
    00968       break;
    00969     }
    00970
    00971     /* So something depended directly on us */
    00972     if (force_selection) continue;
    00973
    00974     /* Nothing depends on us, mark the whole graph as unselected.
    00975      * After that's done run over them once again to test their children
    00976      * to unselect. Don't do it immediately because it'll do exactly what
    00977      * we're doing now. */
    00978     for (ConstContentIterator iter = parents.Begin(); iter != parents.End(); iter++) {
    00979       const ContentInfo *c = *iter;
    00980       if (c->state == ContentInfo::AUTOSELECTED) this->Unselect(c->id);
    00981     }
    00982     for (ConstContentIterator iter = parents.Begin(); iter != parents.End(); iter++) {
    00983       this->CheckDependencyState(this->GetContent((*iter)->id));
    00984     }
    00985   }
    00986 }
    00987
    00989 void ClientNetworkContentSocketHandler::Clear()
    00990 {
    00991   for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) delete *iter;
    00992
    00993   this->infos.Clear();
    00994   this->requested.Clear();
    00995 }
    00996
    00997 /*** CALLBACK ***/
    00998
    00999 void ClientNetworkContentSocketHandler::OnConnect(bool success)
    01000 {
    01001   for (ContentCallback **iter = this->callbacks.Begin(); iter != this->callbacks.End(); /* nothing */) {
    01002     ContentCallback *cb = *iter;
    01003     cb->OnConnect(success);
    01004     if (iter != this->callbacks.End() && *iter == cb) iter++;
    01005   }
    01006 }
    01007
    01008 void ClientNetworkContentSocketHandler::OnDisconnect()
    01009 {
    01010   for (ContentCallback **iter = this->callbacks.Begin(); iter != this->callbacks.End(); /* nothing */) {
    01011     ContentCallback *cb = *iter;
    01012     cb->OnDisconnect();
    01013     if (iter != this->callbacks.End() && *iter == cb) iter++;
    01014   }
    01015 }
    01016
    01017 void ClientNetworkContentSocketHandler::OnReceiveContentInfo(const ContentInfo *ci)
    01018 {
    01019   for (ContentCallback **iter = this->callbacks.Begin(); iter != this->callbacks.End(); /* nothing */) {
    01020     ContentCallback *cb = *iter;
    01021     cb->OnReceiveContentInfo(ci);
    01022     if (iter != this->callbacks.End() && *iter == cb) iter++;
    01023   }
    01024 }
    01025
    01026 void ClientNetworkContentSocketHandler::OnDownloadProgress(const ContentInfo *ci, uint bytes)
    01027 {
    01028   for (ContentCallback **iter = this->callbacks.Begin(); iter != this->callbacks.End(); /* nothing */) {
    01029     ContentCallback *cb = *iter;
    01030     cb->OnDownloadProgress(ci, bytes);
    01031     if (iter != this->callbacks.End() && *iter == cb) iter++;
    01032   }
    01033 }
    01034
    01035 void ClientNetworkContentSocketHandler::OnDownloadComplete(ContentID cid)
    01036 {
    01037   ContentInfo *ci = this->GetContent(cid);
    01038   if (ci != NULL) {
    01039     ci->state = ContentInfo::ALREADY_HERE;
    01040   }
    01041
    01042   for (ContentCallback **iter = this->callbacks.Begin(); iter != this->callbacks.End(); /* nothing */) {
    01043     ContentCallback *cb = *iter;
    01044     cb->OnDownloadComplete(cid);
    01045     if (iter != this->callbacks.End() && *iter == cb) iter++;
    01046   }
    01047 }
    01048
    01049 #endif /* ENABLE_NETWORK */