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, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
  29 {
  30         FileListStruct *F = (FileListStruct*) Context;
  31         StrBufAppendTemplate(Target, nArgs, Tokens, Context, ContextType, F->Filename, 0);
  32 }
  33 void tmplput_FILE_SIZE(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
  34 {
  35         FileListStruct *F = (FileListStruct*) Context;
  36         StrBufAppendPrintf(Target, "%ld", F->FileSize);
  37 }
  38 void tmplput_FILEMIMETYPE(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
  39 {
  40         FileListStruct *F = (FileListStruct*) Context;
  41         StrBufAppendTemplate(Target, nArgs, Tokens, Context, ContextType, F->MimeType, 0);
  42 }
  43 void tmplput_FILE_COMMENT(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
  44 {
  45         FileListStruct *F = (FileListStruct*) Context;
  46         StrBufAppendTemplate(Target, nArgs, Tokens, Context, ContextType, F->Comment, 0);
  47 }
  48
  49 /* -------------------------------------------------------------------------------- */
  50
  51 int Conditional_FILE_ISPIC(WCTemplateToken *Tokens, void *Context, int ContextType)
  52 {
  53         FileListStruct *F = (FileListStruct*) Context;
  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, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
 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
 177         serv_puts("RDIR");
 178         serv_getln(buf, sizeof buf);
 179         if (buf[0] != '1') return NULL;
 180
 181         Buf = NewStrBuf();
 182         Files = NewHash(1, NULL);
 183         while (!Done && (StrBuf_ServGetln(Buf)>=0)) {
 184                 if ( (StrLength(Buf)==3) &&
 185                     !strcmp(ChrPtr(Buf), "000"))
 186                 {
 187                         Done = 1;
 188                         continue;
 189                 }
 190
 191                 Entry = (FileListStruct*) malloc(sizeof (FileListStruct));
 192                 Entry->Filename = NewStrBufPlain(NULL, StrLength(Buf));
 193                 Entry->MimeType = NewStrBufPlain(NULL, StrLength(Buf));
 194                 Entry->Comment = NewStrBufPlain(NULL, StrLength(Buf));
 195
 196                 Entry->Sequence = sequence++;
 197
 198                 StrBufExtract_token(Entry->Filename, Buf, 0, '|');
 199                 Entry->FileSize = StrBufExtract_long(Buf, 1, '|');
 200                 StrBufExtract_token(Entry->MimeType, Buf, 2, '|');
 201                 StrBufExtract_token(Entry->Comment, Buf, 3, '|');
 202
 203
 204
 205                 Entry->IsPic = (strstr(ChrPtr(Entry->MimeType), "image") != NULL);
 206                 if (Entry->IsPic) {
 207                         HavePic = 1;
 208                 }
 209                 Put(Files, SKEY(Entry->Filename), Entry, FreeFiles);
 210         }
 211         SortIt = RetrieveSort(CTX_FILELIST, NULL, HKEY("fileunsorted"), 0);
 212         if (SortIt != NULL)
 213                 SortByPayload(Files, SortIt);
 214         else
 215                 SortByPayload(Files, CompareFilelistBySequence);
 216         FreeStrBuf(&Buf);
 217         svputlong("FILE:HAVEPICS", HavePic);
 218         return Files;
 219 }
 220
 221 void display_mime_icon(void)
 222 {
 223         char FileBuf[SIZ];
 224         const char *FileName;
 225         char *MimeType;
 226         size_t tlen;
 227
 228         MimeType = xbstr("type", &tlen);
 229         FileName = GetIconFilename(MimeType, tlen);
 230
 231         if (FileName == NULL)
 232                 snprintf (FileBuf, SIZ, "%s%s", static_dirs[0], "/diskette_24x.gif");
 233         else
 234                 snprintf (FileBuf, SIZ, "%s%s", static_dirs[3], FileName);
 235         output_static(FileBuf);
 236 }
 237
 238 void download_file(void)
 239 {
 240         char buf[256];
 241         off_t bytes;
 242         char content_type[256];
 243         char *content = NULL;
 244
 245         /* Setting to nonzero forces a MIME type of application/octet-stream */
 246         int force_download = 1;
 247
 248         safestrncpy(buf, ChrPtr(WC->UrlFragment2), sizeof buf);
 249         unescape_input(buf);
 250         serv_printf("OPEN %s", buf);
 251         serv_getln(buf, sizeof buf);
 252         if (buf[0] == '2') {
 253                 bytes = extract_long(&buf[4], 0);
 254                 content = malloc(bytes + 2);
 255                 if (force_download) {
 256                         strcpy(content_type, "application/octet-stream");
 257                 }
 258                 else {
 259                         extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
 260                 }
 261                 output_headers(0, 0, 0, 0, 0, 0);
 262                 read_server_binary(WC->WBuf, bytes);
 263                 serv_puts("CLOS");
 264                 serv_getln(buf, sizeof buf);
 265                 http_transmit_thing(content_type, 0);
 266                 free(content);
 267         } else {
 268                 hprintf("HTTP/1.1 404 %s\n", &buf[4]);
 269                 output_headers(0, 0, 0, 0, 0, 0);
 270                 hprintf("Content-Type: text/plain\r\n");
 271                 wprintf(_("An error occurred while retrieving this file: %s\n"), &buf[4]);
 272                 end_burst();
 273         }
 274 }
 275
 276
 277
 278 void upload_file(void)
 279 {
 280         const char *MimeType;
 281         char buf[1024];
 282         long bytes_transmitted = 0;
 283         long blocksize;
 284         wcsession *WCC = WC;     /* stack this for faster access (WC is a function) */
 285
 286         MimeType = GuessMimeType(WCC->upload, WCC->upload_length);
 287         serv_printf("UOPN %s|%s|%s", WCC->upload_filename, MimeType, bstr("description"));
 288         serv_getln(buf, sizeof buf);
 289         if (buf[0] != '2')
 290         {
 291                 strcpy(WCC->ImportantMessage, &buf[4]);
 292                 do_template("files", NULL);
 293                 return;
 294         }
 295
 296         while (bytes_transmitted < WCC->upload_length)
 297         {
 298                 blocksize = 4096;
 299                 if (blocksize > (WCC->upload_length - bytes_transmitted))
 300                 {
 301                         blocksize = (WCC->upload_length - bytes_transmitted);
 302                 }
 303                 serv_printf("WRIT %ld", blocksize);
 304                 serv_getln(buf, sizeof buf);
 305                 if (buf[0] == '7')
 306                 {
 307                         blocksize = atoi(&buf[4]);
 308                         serv_write(&WCC->upload[bytes_transmitted], blocksize);
 309                         bytes_transmitted += blocksize;
 310                 }
 311         }
 312
 313         serv_puts("UCLS 1");
 314         serv_getln(buf, sizeof buf);
 315         strcpy(WCC->ImportantMessage, &buf[4]);
 316         do_template("files", CTX_NONE);
 317 }
 318
 319
 320
 321 /*
 322  * When the browser requests an image file from the Citadel server,
 323  * this function is called to transmit it.
 324  */
 325 void output_image(void)
 326 {
 327         char blank_gif[SIZ];
 328         wcsession *WCC = WC;
 329         char buf[SIZ];
 330         off_t bytes;
 331         const char *MimeType;
 332
 333         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 334         serv_getln(buf, sizeof buf);
 335         if (buf[0] == '2') {
 336                 bytes = extract_long(&buf[4], 0);
 337
 338                 /** Read it from the server */
 339
 340                 if (read_server_binary(WCC->WBuf, bytes) > 0) {
 341                         serv_puts("CLOS");
 342                         serv_getln(buf, sizeof buf);
 343
 344                         MimeType = GuessMimeType (ChrPtr(WCC->WBuf), StrLength(WCC->WBuf));
 345                         /** Write it to the browser */
 346                         if (!IsEmptyStr(MimeType))
 347                         {
 348                                 http_transmit_thing(MimeType, 0);
 349                                 return;
 350                         }
 351                 }
 352                 /* hm... unknown mimetype? fallback to blank gif */
 353         }
 354
 355
 356         /*
 357          * Instead of an ugly 404, send a 1x1 transparent GIF
 358          * when there's no such image on the server.
 359          */
 360         snprintf (blank_gif, SIZ, "%s%s", static_dirs[0], "/blank.gif");
 361         output_static(blank_gif);
 362 }
 363
 364 void
 365 InitModule_DOWNLOAD
 366 (void)
 367 {
 368
 369         RegisterIterator("ROOM:FILES", 0, NULL, LoadFileList,
 370                          NULL, DeleteHash, CTX_FILELIST, CTX_NONE,
 371                          IT_FLAG_DETECT_GROUPCHANGE);
 372
 373         RegisterSortFunc(HKEY("filemime"),
 374                          NULL, 0,
 375                          CompareFilelistByMime,
 376                          CompareFilelistByMimeRev,
 377                          GroupchangeFilelistByMime,
 378                          CTX_FILELIST);
 379         RegisterSortFunc(HKEY("filename"),
 380                          NULL, 0,
 381                          CompareFilelistByName,
 382                          CompareFilelistByNameRev,
 383                          GroupchangeFilelistByName,
 384                          CTX_FILELIST);
 385         RegisterSortFunc(HKEY("filesize"),
 386                          NULL, 0,
 387                          CompareFilelistBySize,
 388                          CompareFilelistBySizeRev,
 389                          GroupchangeFilelistBySize,
 390                          CTX_FILELIST);
 391         RegisterSortFunc(HKEY("filesubject"),
 392                          NULL, 0,
 393                          CompareFilelistByComment,
 394                          CompareFilelistByCommentRev,
 395                          GroupchangeFilelistByComment,
 396                          CTX_FILELIST);
 397         RegisterSortFunc(HKEY("fileunsorted"),
 398                          NULL, 0,
 399                          CompareFilelistBySequence,
 400                          CompareFilelistBySequence,
 401                          GroupchangeFilelistBySequence,
 402                          CTX_FILELIST);
 403
 404         RegisterNamespace("FILE:NAME", 0, 2, tmplput_FILE_NAME, CTX_FILELIST);
 405         RegisterNamespace("FILE:SIZE", 0, 1, tmplput_FILE_SIZE, CTX_FILELIST);
 406         RegisterNamespace("FILE:MIMETYPE", 0, 2, tmplput_FILEMIMETYPE, CTX_FILELIST);
 407         RegisterNamespace("FILE:COMMENT", 0, 2, tmplput_FILE_COMMENT, CTX_FILELIST);
 408
 409         RegisterConditional(HKEY("COND:FILE:ISPIC"), 0, Conditional_FILE_ISPIC, CTX_FILELIST);
 410
 411         WebcitAddUrlHandler(HKEY("image"), output_image, 0);
 412         WebcitAddUrlHandler(HKEY("display_mime_icon"), display_mime_icon , 0);
 413         WebcitAddUrlHandler(HKEY("download_file"), download_file, NEED_URL);
 414         WebcitAddUrlHandler(HKEY("upload_file"), upload_file, 0);
 415 }