webcit/downloads.c

   1 /*
   2  * $Id$
   3  */
   4 #include "webcit.h"
   5 #include "webserver.h"
   6
   7 extern char* static_dirs[];
   8
   9 typedef struct _FileListStruct {
  10         StrBuf *Filename;
  11         long FileSize;
  12         StrBuf *MimeType;
  13         StrBuf *Comment;
  14         int IsPic;
  15         int Sequence;
  16 } FileListStruct;
  17
  18 void FreeFiles(void *vFile)
  19 {
  20         FileListStruct *F = (FileListStruct*) vFile;
  21         FreeStrBuf(&F->Filename);
  22         FreeStrBuf(&F->MimeType);
  23         FreeStrBuf(&F->Comment);
  24         free(F);
  25 }
  26
  27 /* -------------------------------------------------------------------------------- */
  28 void tmplput_FILE_NAME(StrBuf *Target, WCTemplputParams *TP)
  29 {
  30         FileListStruct *F = (FileListStruct*) CTX;
  31         StrBufAppendTemplate(Target, TP, F->Filename, 0);
  32 }
  33 void tmplput_FILE_SIZE(StrBuf *Target, WCTemplputParams *TP)
  34 {
  35         FileListStruct *F = (FileListStruct*) CTX;
  36         StrBufAppendPrintf(Target, "%ld", F->FileSize);
  37 }
  38 void tmplput_FILEMIMETYPE(StrBuf *Target, WCTemplputParams *TP)
  39 {
  40         FileListStruct *F = (FileListStruct*) CTX;
  41         StrBufAppendTemplate(Target, TP, F->MimeType, 0);
  42 }
  43 void tmplput_FILE_COMMENT(StrBuf *Target, WCTemplputParams *TP)
  44 {
  45         FileListStruct *F = (FileListStruct*) CTX;
  46         StrBufAppendTemplate(Target, TP, F->Comment, 0);
  47 }
  48
  49 /* -------------------------------------------------------------------------------- */
  50
  51 int Conditional_FILE_ISPIC(StrBuf *Target, WCTemplputParams *TP)
  52 {
  53         FileListStruct *F = (FileListStruct*) CTX;
  54         return F->IsPic;
  55 }
  56
  57 /* -------------------------------------------------------------------------------- */
  58 int CompareFilelistByMime(const void *vFile1, const void *vFile2)
  59 {
  60         FileListStruct *File1 = (FileListStruct*) GetSearchPayload(vFile1);
  61         FileListStruct *File2 = (FileListStruct*) GetSearchPayload(vFile2);
  62
  63         if (File1->IsPic != File2->IsPic)
  64                 return File1->IsPic > File2->IsPic;
  65         return strcasecmp(ChrPtr(File1->MimeType), ChrPtr(File2->MimeType));
  66 }
  67 int CompareFilelistByMimeRev(const void *vFile1, const void *vFile2)
  68 {
  69         FileListStruct *File1 = (FileListStruct*) GetSearchPayload(vFile1);
  70         FileListStruct *File2 = (FileListStruct*) GetSearchPayload(vFile2);
  71         if (File1->IsPic != File2->IsPic)
  72                 return File1->IsPic < File2->IsPic;
  73         return strcasecmp(ChrPtr(File2->MimeType), ChrPtr(File1->MimeType));
  74 }
  75 int GroupchangeFilelistByMime(const void *vFile1, const void *vFile2)
  76 {
  77         FileListStruct *File1 = (FileListStruct*) vFile1;
  78         FileListStruct *File2 = (FileListStruct*) vFile2;
  79
  80         if (File1->IsPic != File2->IsPic)
  81                 return File1->IsPic > File2->IsPic;
  82         return strcasecmp(ChrPtr(File1->MimeType), ChrPtr(File2->MimeType)) != 0;
  83 }
  84
  85
  86 int CompareFilelistByName(const void *vFile1, const void *vFile2)
  87 {
  88         FileListStruct *File1 = (FileListStruct*) GetSearchPayload(vFile1);
  89         FileListStruct *File2 = (FileListStruct*) GetSearchPayload(vFile2);
  90
  91         if (File1->IsPic != File2->IsPic)
  92                 return File1->IsPic > File2->IsPic;
  93         return strcasecmp(ChrPtr(File1->Filename), ChrPtr(File2->Filename));
  94 }
  95 int CompareFilelistByNameRev(const void *vFile1, const void *vFile2)
  96 {
  97         FileListStruct *File1 = (FileListStruct*) GetSearchPayload(vFile1);
  98         FileListStruct *File2 = (FileListStruct*) GetSearchPayload(vFile2);
  99         if (File1->IsPic != File2->IsPic)
 100                 return File1->IsPic < File2->IsPic;
 101         return strcasecmp(ChrPtr(File2->Filename), ChrPtr(File1->Filename));
 102 }
 103 int GroupchangeFilelistByName(const void *vFile1, const void *vFile2)
 104 {
 105         FileListStruct *File1 = (FileListStruct*) vFile1;
 106         FileListStruct *File2 = (FileListStruct*) vFile2;
 107
 108         return ChrPtr(File1->Filename)[0] != ChrPtr(File2->Filename)[0];
 109 }
 110
 111
 112 int CompareFilelistBySize(const void *vFile1, const void *vFile2)
 113 {
 114         FileListStruct *File1 = (FileListStruct*) GetSearchPayload(vFile1);
 115         FileListStruct *File2 = (FileListStruct*) GetSearchPayload(vFile2);
 116         if (File1->FileSize == File2->FileSize)
 117                 return 0;
 118         return (File1->FileSize > File2->FileSize);
 119 }
 120 int CompareFilelistBySizeRev(const void *vFile1, const void *vFile2)
 121 {
 122         FileListStruct *File1 = (FileListStruct*) GetSearchPayload(vFile1);
 123         FileListStruct *File2 = (FileListStruct*) GetSearchPayload(vFile2);
 124         if (File1->FileSize == File2->FileSize)
 125                 return 0;
 126         return (File1->FileSize < File2->FileSize);
 127 }
 128 int GroupchangeFilelistBySize(const void *vFile1, const void *vFile2)
 129 {
 130         return 0;
 131 }
 132
 133
 134 int CompareFilelistByComment(const void *vFile1, const void *vFile2)
 135 {
 136         FileListStruct *File1 = (FileListStruct*) GetSearchPayload(vFile1);
 137         FileListStruct *File2 = (FileListStruct*) GetSearchPayload(vFile2);
 138         return strcasecmp(ChrPtr(File1->Comment), ChrPtr(File2->Comment));
 139 }
 140 int CompareFilelistByCommentRev(const void *vFile1, const void *vFile2)
 141 {
 142         FileListStruct *File1 = (FileListStruct*) GetSearchPayload(vFile1);
 143         FileListStruct *File2 = (FileListStruct*) GetSearchPayload(vFile2);
 144         return strcasecmp(ChrPtr(File2->Comment), ChrPtr(File1->Comment));
 145 }
 146 int GroupchangeFilelistByComment(const void *vFile1, const void *vFile2)
 147 {
 148         FileListStruct *File1 = (FileListStruct*) vFile1;
 149         FileListStruct *File2 = (FileListStruct*) vFile2;
 150         return ChrPtr(File1->Comment)[9] != ChrPtr(File2->Comment)[0];
 151 }
 152
 153
 154 int CompareFilelistBySequence(const void *vFile1, const void *vFile2)
 155 {
 156         FileListStruct *File1 = (FileListStruct*) GetSearchPayload(vFile1);
 157         FileListStruct *File2 = (FileListStruct*) GetSearchPayload(vFile2);
 158         return (File2->Sequence >  File1->Sequence);
 159 }
 160 int GroupchangeFilelistBySequence(const void *vFile1, const void *vFile2)
 161 {
 162         return 0;
 163 }
 164
 165 /* -------------------------------------------------------------------------------- */
 166 HashList* LoadFileList(StrBuf *Target, WCTemplputParams *TP)
 167 {
 168         FileListStruct *Entry;
 169         StrBuf *Buf;
 170         HashList *Files;
 171         int Done = 0;
 172         int sequence = 0;
 173         char buf[1024];
 174         CompareFunc SortIt;
 175         int HavePic;
 176         WCTemplputParams SubTP;
 177
 178         memset(&TP, 0, sizeof(WCTemplputParams));
 179         serv_puts("RDIR");
 180         serv_getln(buf, sizeof buf);
 181         if (buf[0] != '1') return NULL;
 182
 183         Buf = NewStrBuf();
 184         Files = NewHash(1, NULL);
 185         while (!Done && (StrBuf_ServGetln(Buf)>=0)) {
 186                 if ( (StrLength(Buf)==3) &&
 187                     !strcmp(ChrPtr(Buf), "000"))
 188                 {
 189                         Done = 1;
 190                         continue;
 191                 }
 192
 193                 Entry = (FileListStruct*) malloc(sizeof (FileListStruct));
 194                 Entry->Filename = NewStrBufPlain(NULL, StrLength(Buf));
 195                 Entry->MimeType = NewStrBufPlain(NULL, StrLength(Buf));
 196                 Entry->Comment = NewStrBufPlain(NULL, StrLength(Buf));
 197
 198                 Entry->Sequence = sequence++;
 199
 200                 StrBufExtract_token(Entry->Filename, Buf, 0, '|');
 201                 Entry->FileSize = StrBufExtract_long(Buf, 1, '|');
 202                 StrBufExtract_token(Entry->MimeType, Buf, 2, '|');
 203                 StrBufExtract_token(Entry->Comment, Buf, 3, '|');
 204
 205
 206
 207                 Entry->IsPic = (strstr(ChrPtr(Entry->MimeType), "image") != NULL);
 208                 if (Entry->IsPic) {
 209                         HavePic = 1;
 210                 }
 211                 Put(Files, SKEY(Entry->Filename), Entry, FreeFiles);
 212         }
 213         SubTP.Filter.ContextType = CTX_FILELIST;
 214         SortIt = RetrieveSort(&SubTP, NULL, 0, HKEY("fileunsorted"), 0);
 215         if (SortIt != NULL)
 216                 SortByPayload(Files, SortIt);
 217         else
 218                 SortByPayload(Files, CompareFilelistBySequence);
 219         FreeStrBuf(&Buf);
 220         svputlong("FILE:HAVEPICS", HavePic);
 221         return Files;
 222 }
 223
 224 void display_mime_icon(void)
 225 {
 226         char FileBuf[SIZ];
 227         const char *FileName;
 228         char *MimeType;
 229         size_t tlen;
 230
 231         MimeType = xbstr("type", &tlen);
 232         FileName = GetIconFilename(MimeType, tlen);
 233
 234         if (FileName == NULL)
 235                 snprintf (FileBuf, SIZ, "%s%s", static_dirs[0], "/diskette_24x.gif");
 236         else
 237                 snprintf (FileBuf, SIZ, "%s%s", static_dirs[3], FileName);
 238         output_static(FileBuf);
 239 }
 240
 241 void download_file(void)
 242 {
 243         char buf[256];
 244         off_t bytes;
 245         char content_type[256];
 246         char *content = NULL;
 247
 248         /* Setting to nonzero forces a MIME type of application/octet-stream */
 249         int force_download = 1;
 250
 251         safestrncpy(buf, ChrPtr(WC->UrlFragment2), sizeof buf);
 252         unescape_input(buf);
 253         serv_printf("OPEN %s", buf);
 254         serv_getln(buf, sizeof buf);
 255         if (buf[0] == '2') {
 256                 bytes = extract_long(&buf[4], 0);
 257                 content = malloc(bytes + 2);
 258                 if (force_download) {
 259                         strcpy(content_type, "application/octet-stream");
 260                 }
 261                 else {
 262                         extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
 263                 }
 264                 output_headers(0, 0, 0, 0, 0, 0);
 265                 read_server_binary(WC->WBuf, bytes);
 266                 serv_puts("CLOS");
 267                 serv_getln(buf, sizeof buf);
 268                 http_transmit_thing(content_type, 0);
 269                 free(content);
 270         } else {
 271                 hprintf("HTTP/1.1 404 %s\n", &buf[4]);
 272                 output_headers(0, 0, 0, 0, 0, 0);
 273                 hprintf("Content-Type: text/plain\r\n");
 274                 wprintf(_("An error occurred while retrieving this file: %s\n"), &buf[4]);
 275                 end_burst();
 276         }
 277 }
 278
 279
 280
 281 void delete_file(void)
 282 {
 283         StrBuf *Buf;
 284         char buf[256];
 285
 286         safestrncpy(buf, bstr("file"), sizeof buf);
 287         unescape_input(buf);
 288         serv_printf("DELF %s", buf);
 289         Buf = NewStrBuf();
 290         StrBuf_ServGetln(Buf);
 291         GetServerStatus(Buf, NULL);
 292         StrBufCutLeft(Buf, 4);
 293         strcpy(WC->ImportantMessage, ChrPtr(Buf));
 294         do_template("files", CTX_NONE);
 295         output_headers(0, 0, 0, 0, 0, 0);
 296         end_burst();
 297         FreeStrBuf(&Buf);
 298 }
 299
 300
 301
 302 void upload_file(void)
 303 {
 304         const char *MimeType;
 305         char buf[1024];
 306         long bytes_transmitted = 0;
 307         long blocksize;
 308         wcsession *WCC = WC;     /* stack this for faster access (WC is a function) */
 309
 310         MimeType = GuessMimeType(WCC->upload, WCC->upload_length);
 311         serv_printf("UOPN %s|%s|%s", WCC->upload_filename, MimeType, bstr("description"));
 312         serv_getln(buf, sizeof buf);
 313         if (buf[0] != '2')
 314         {
 315                 strcpy(WCC->ImportantMessage, &buf[4]);
 316                 do_template("files", NULL);
 317                 output_headers(0, 0, 0, 0, 0, 0);
 318                 end_burst();
 319                 return;
 320         }
 321
 322         while (bytes_transmitted < WCC->upload_length)
 323         {
 324                 blocksize = 4096;
 325                 if (blocksize > (WCC->upload_length - bytes_transmitted))
 326                 {
 327                         blocksize = (WCC->upload_length - bytes_transmitted);
 328                 }
 329                 serv_printf("WRIT %ld", blocksize);
 330                 serv_getln(buf, sizeof buf);
 331                 if (buf[0] == '7')
 332                 {
 333                         blocksize = atoi(&buf[4]);
 334                         serv_write(&WCC->upload[bytes_transmitted], blocksize);
 335                         bytes_transmitted += blocksize;
 336                 }
 337         }
 338
 339         serv_puts("UCLS 1");
 340         serv_getln(buf, sizeof buf);
 341         strcpy(WCC->ImportantMessage, &buf[4]);
 342         do_template("files", CTX_NONE);
 343         output_headers(0, 0, 0, 0, 0, 0);
 344         end_burst();
 345 }
 346
 347
 348
 349 /*
 350  * When the browser requests an image file from the Citadel server,
 351  * this function is called to transmit it.
 352  */
 353 void output_image(void)
 354 {
 355         char blank_gif[SIZ];
 356         wcsession *WCC = WC;
 357         char buf[SIZ];
 358         off_t bytes;
 359         const char *MimeType;
 360
 361         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 362         serv_getln(buf, sizeof buf);
 363         if (buf[0] == '2') {
 364                 bytes = extract_long(&buf[4], 0);
 365
 366                 /** Read it from the server */
 367
 368                 if (read_server_binary(WCC->WBuf, bytes) > 0) {
 369                         serv_puts("CLOS");
 370                         serv_getln(buf, sizeof buf);
 371
 372                         MimeType = GuessMimeType (ChrPtr(WCC->WBuf), StrLength(WCC->WBuf));
 373                         /** Write it to the browser */
 374                         if (!IsEmptyStr(MimeType))
 375                         {
 376                                 http_transmit_thing(MimeType, 0);
 377                                 return;
 378                         }
 379                 }
 380                 /* hm... unknown mimetype? fallback to blank gif */
 381         }
 382
 383
 384         /*
 385          * Instead of an ugly 404, send a 1x1 transparent GIF
 386          * when there's no such image on the server.
 387          */
 388         snprintf (blank_gif, SIZ, "%s%s", static_dirs[0], "/blank.gif");
 389         output_static(blank_gif);
 390 }
 391
 392 void
 393 InitModule_DOWNLOAD
 394 (void)
 395 {
 396
 397         RegisterIterator("ROOM:FILES", 0, NULL, LoadFileList,
 398                          NULL, DeleteHash, CTX_FILELIST, CTX_NONE,
 399                          IT_FLAG_DETECT_GROUPCHANGE);
 400
 401         RegisterSortFunc(HKEY("filemime"),
 402                          NULL, 0,
 403                          CompareFilelistByMime,
 404                          CompareFilelistByMimeRev,
 405                          GroupchangeFilelistByMime,
 406                          CTX_FILELIST);
 407         RegisterSortFunc(HKEY("filename"),
 408                          NULL, 0,
 409                          CompareFilelistByName,
 410                          CompareFilelistByNameRev,
 411                          GroupchangeFilelistByName,
 412                          CTX_FILELIST);
 413         RegisterSortFunc(HKEY("filesize"),
 414                          NULL, 0,
 415                          CompareFilelistBySize,
 416                          CompareFilelistBySizeRev,
 417                          GroupchangeFilelistBySize,
 418                          CTX_FILELIST);
 419         RegisterSortFunc(HKEY("filesubject"),
 420                          NULL, 0,
 421                          CompareFilelistByComment,
 422                          CompareFilelistByCommentRev,
 423                          GroupchangeFilelistByComment,
 424                          CTX_FILELIST);
 425         RegisterSortFunc(HKEY("fileunsorted"),
 426                          NULL, 0,
 427                          CompareFilelistBySequence,
 428                          CompareFilelistBySequence,
 429                          GroupchangeFilelistBySequence,
 430                          CTX_FILELIST);
 431
 432         RegisterNamespace("FILE:NAME", 0, 2, tmplput_FILE_NAME, CTX_FILELIST);
 433         RegisterNamespace("FILE:SIZE", 0, 1, tmplput_FILE_SIZE, CTX_FILELIST);
 434         RegisterNamespace("FILE:MIMETYPE", 0, 2, tmplput_FILEMIMETYPE, CTX_FILELIST);
 435         RegisterNamespace("FILE:COMMENT", 0, 2, tmplput_FILE_COMMENT, CTX_FILELIST);
 436
 437         RegisterConditional(HKEY("COND:FILE:ISPIC"), 0, Conditional_FILE_ISPIC, CTX_FILELIST);
 438
 439         WebcitAddUrlHandler(HKEY("image"), output_image, ANONYMOUS);
 440         WebcitAddUrlHandler(HKEY("display_mime_icon"), display_mime_icon , ANONYMOUS);
 441         WebcitAddUrlHandler(HKEY("download_file"), download_file, NEED_URL);
 442         WebcitAddUrlHandler(HKEY("delete_file"), delete_file, NEED_URL);
 443         WebcitAddUrlHandler(HKEY("upload_file"), upload_file, 0);
 444 }