webcit/static.c

   1 /*
   2  * This is the main transaction loop of the web service.  It maintains a
   3  * persistent session to the Citadel server, handling HTTP WebCit requests as
   4  * they arrive and presenting a user interface.
   5  */
   6 #include <sys/types.h>
   7 #include <sys/stat.h>
   8 #include <dirent.h>
   9 #include <errno.h>
  10
  11 #include <unistd.h>
  12 #include <stdio.h>
  13 #include <stdarg.h>
  14 #include <stddef.h>
  15
  16
  17 #include "webcit.h"
  18 #include "webserver.h"
  19
  20
  21 HashList *StaticFilemappings[4] = {NULL, NULL, NULL, NULL};
  22 /*
  23                 {
  24                         lprintf(9, "Suspicious request. Ignoring.");
  25                         hprintf("HTTP/1.1 404 Security check failed\r\n");
  26                         hprintf("Content-Type: text/plain\r\n\r\n");
  27                         wc_printf("You have sent a malformed or invalid request.\r\n");
  28                         end_burst();
  29                 }
  30 */
  31 /*
  32  * dump out static pages from disk
  33  */
  34 void output_static(const char *what)
  35 {
  36         int fd;
  37         struct stat statbuf;
  38         off_t bytes;
  39         off_t count = 0;
  40         const char *content_type;
  41         int len;
  42         const char *Err;
  43
  44         fd = open(what, O_RDONLY);
  45         if (fd <= 0) {
  46                 lprintf(9, "output_static('%s') [%s]  -- NOT FOUND --\n", what, ChrPtr(WC->Hdr->this_page));
  47                 hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
  48                 hprintf("Content-Type: text/plain\r\n");
  49                 begin_burst();
  50                 wc_printf("Cannot open %s: %s\r\n", what, strerror(errno));
  51                 end_burst();
  52         } else {
  53                 len = strlen (what);
  54                 content_type = GuessMimeByFilename(what, len);
  55
  56                 if (fstat(fd, &statbuf) == -1) {
  57                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
  58                         hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
  59                         hprintf("Content-Type: text/plain\r\n");
  60                         begin_burst();
  61                         wc_printf("Cannot fstat %s: %s\n", what, strerror(errno));
  62                         end_burst();
  63                         if (fd > 0) close(fd);
  64                         return;
  65                 }
  66
  67                 count = 0;
  68                 bytes = statbuf.st_size;
  69
  70                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
  71                 {
  72                         if (fd > 0) close(fd);
  73                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
  74                                 hprintf("HTTP/1.1 500 internal server error \r\n");
  75                                 hprintf("Content-Type: text/plain\r\n");
  76                                 end_burst();
  77                                 return;
  78                 }
  79
  80
  81                 close(fd);
  82 #ifndef TECH_PREVIEW
  83                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
  84 #endif
  85                 http_transmit_thing(content_type, 2);
  86         }
  87         if (yesbstr("force_close_session")) {
  88                 end_webcit_session();
  89         }
  90 }
  91
  92
  93 int LoadStaticDir(const char *DirName, HashList *DirList, const char *RelDir)
  94 {
  95         char dirname[PATH_MAX];
  96         char reldir[PATH_MAX];
  97         StrBuf *FileName = NULL;
  98         StrBuf *Dir = NULL;
  99         StrBuf *WebDir = NULL;
 100         StrBuf *OneWebName = NULL;
 101         DIR *filedir = NULL;
 102         struct dirent *d;
 103         struct dirent *filedir_entry;
 104         int d_type = 0;
 105         int d_namelen;
 106         int d_without_ext;
 107         int istoplevel;
 108
 109         filedir = opendir (DirName);
 110         if (filedir == NULL) {
 111                 return 0;
 112         }
 113
 114         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 115         if (d == NULL) {
 116                 return 0;
 117         }
 118
 119         Dir = NewStrBufPlain(DirName, -1);
 120         WebDir = NewStrBufPlain(RelDir, -1);
 121         istoplevel = IsEmptyStr(RelDir);
 122         OneWebName = NewStrBuf();
 123
 124         while ((readdir_r(filedir, d, &filedir_entry) == 0) &&
 125                (filedir_entry != NULL))
 126         {
 127                 char *PStart;
 128 #ifdef _DIRENT_HAVE_D_NAMELEN
 129                 d_namelen = filedir_entry->d_namelen;
 130                 d_type = filedir_entry->d_type;
 131 #else
 132
 133 #ifndef DT_UNKNOWN
 134 #define DT_UNKNOWN     0
 135 #define DT_DIR         4
 136 #define DT_REG         8
 137 #define DT_LNK         10
 138
 139 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
 140 #define DTTOIF(dirtype)        ((dirtype) << 12)
 141 #endif
 142                 d_namelen = strlen(filedir_entry->d_name);
 143                 d_type = DT_UNKNOWN;
 144 #endif
 145                 d_without_ext = d_namelen;
 146
 147                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 148                         continue; /* Ignore backup files... */
 149
 150                 if ((d_namelen == 1) &&
 151                     (filedir_entry->d_name[0] == '.'))
 152                         continue;
 153
 154                 if ((d_namelen == 2) &&
 155                     (filedir_entry->d_name[0] == '.') &&
 156                     (filedir_entry->d_name[1] == '.'))
 157                         continue;
 158
 159                 if (d_type == DT_UNKNOWN) {
 160                         struct stat s;
 161                         char path[PATH_MAX];
 162                         snprintf(path, PATH_MAX, "%s/%s",
 163                                 DirName, filedir_entry->d_name);
 164                         if (stat(path, &s) == 0) {
 165                                 d_type = IFTODT(s.st_mode);
 166                         }
 167                 }
 168
 169                 switch (d_type)
 170                 {
 171                 case DT_DIR:
 172                         /* Skip directories we are not interested in... */
 173                         if ((strcmp(filedir_entry->d_name, ".svn") == 0) ||
 174                             (strcmp(filedir_entry->d_name, "t") == 0))
 175                                 break;
 176                         snprintf(dirname, PATH_MAX, "%s/%s/",
 177                                  DirName, filedir_entry->d_name);
 178                         if (istoplevel)
 179                                 snprintf(reldir, PATH_MAX, "%s/",
 180                                          filedir_entry->d_name);
 181                         else
 182                                 snprintf(reldir, PATH_MAX, "%s/%s/",
 183                                          RelDir, filedir_entry->d_name);
 184                         StripSlashes(dirname, 1);
 185                         StripSlashes(reldir, 1);
 186                         LoadStaticDir(dirname, DirList, reldir);
 187                         break;
 188                 case DT_LNK: /* TODO: check whether its a file or a directory */
 189                 case DT_REG:
 190                         PStart = filedir_entry->d_name;
 191                         FileName = NewStrBufDup(Dir);
 192                         if (ChrPtr(FileName) [ StrLength(FileName) - 1] != '/')
 193                                 StrBufAppendBufPlain(FileName, "/", 1, 0);
 194                         StrBufAppendBufPlain(FileName, filedir_entry->d_name, d_namelen, 0);
 195
 196                         FlushStrBuf(OneWebName);
 197                         StrBufAppendBuf(OneWebName, WebDir, 0);
 198                         if ((StrLength(OneWebName) != 0) &&
 199                             (ChrPtr(OneWebName) [ StrLength(OneWebName) - 1] != '/'))
 200                                 StrBufAppendBufPlain(OneWebName, "/", 1, 0);
 201                         StrBufAppendBufPlain(OneWebName, filedir_entry->d_name, d_namelen, 0);
 202
 203                         Put(DirList, SKEY(OneWebName), FileName, HFreeStrBuf);
 204                         /* lprintf(9, "[%s | %s]\n", ChrPtr(OneWebName), ChrPtr(FileName)); */
 205                         break;
 206                 default:
 207                         break;
 208                 }
 209
 210
 211         }
 212         free(d);
 213         closedir(filedir);
 214         FreeStrBuf(&Dir);
 215         FreeStrBuf(&WebDir);
 216         FreeStrBuf(&OneWebName);
 217         return 1;
 218 }
 219
 220
 221 void output_flat_static(void)
 222 {
 223         wcsession *WCC = WC;
 224         void *vFile;
 225         StrBuf *File;
 226
 227         if (WCC->Hdr->HR.Handler == NULL)
 228                 return;
 229         if (GetHash(StaticFilemappings[0], SKEY(WCC->Hdr->HR.Handler->Name), &vFile) &&
 230             (vFile != NULL))
 231         {
 232                 File = (StrBuf*) vFile;
 233                 output_static(ChrPtr(vFile));
 234         }
 235 }
 236
 237 extern void do_404(void);
 238
 239 void output_static_safe(HashList *DirList)
 240 {
 241         wcsession *WCC = WC;
 242         void *vFile;
 243         StrBuf *File;
 244
 245         if (GetHash(DirList, SKEY(WCC->Hdr->HR.ReqLine), &vFile) &&
 246             (vFile != NULL))
 247         {
 248                 File = (StrBuf*) vFile;
 249                 output_static(ChrPtr(vFile));
 250         }
 251         else {
 252                 lprintf(1, "output_static_safe() file %s not found. \n",
 253                         ChrPtr(WCC->Hdr->HR.ReqLine));
 254 ///TODO: detect image & output blank image
 255                 do_404();
 256         }
 257 }
 258 void output_static_0(void)
 259 {
 260         output_static_safe(StaticFilemappings[0]);
 261 }
 262 void output_static_1(void)
 263 {
 264         output_static_safe(StaticFilemappings[1]);
 265 }
 266 void output_static_2(void)
 267 {
 268         output_static_safe(StaticFilemappings[2]);
 269 }
 270 void output_static_3(void)
 271 {
 272         output_static_safe(StaticFilemappings[3]);
 273 }
 274
 275
 276 /*
 277  * robots.txt
 278  */
 279 void robots_txt(void) {
 280         output_headers(0, 0, 0, 0, 0, 0);
 281
 282         hprintf("Content-type: text/plain\r\n"
 283                 "Server: %s\r\n"
 284                 "Connection: close\r\n",
 285                 PACKAGE_STRING);
 286         begin_burst();
 287
 288         wc_printf("User-agent: *\r\n"
 289                 "Disallow:\r\n"
 290                 "Sitemap: %s/sitemap.xml\r\n"
 291                 "\r\n"
 292                 ,
 293                 ChrPtr(site_prefix)
 294         );
 295
 296         wDumpContent(0);
 297 }
 298
 299
 300 void
 301 ServerStartModule_STATIC
 302 (void)
 303 {
 304         StaticFilemappings[0] = NewHash(1, NULL);
 305         StaticFilemappings[1] = NewHash(1, NULL);
 306         StaticFilemappings[2] = NewHash(1, NULL);
 307         StaticFilemappings[3] = NewHash(1, NULL);
 308 }
 309 void
 310 ServerShutdownModule_STATIC
 311 (void)
 312 {
 313         DeleteHash(&StaticFilemappings[0]);
 314         DeleteHash(&StaticFilemappings[1]);
 315         DeleteHash(&StaticFilemappings[2]);
 316         DeleteHash(&StaticFilemappings[3]);
 317 }
 318
 319
 320 void
 321 InitModule_STATIC
 322 (void)
 323 {
 324         LoadStaticDir(static_dirs[0], StaticFilemappings[0], "");
 325         LoadStaticDir(static_dirs[1], StaticFilemappings[1], "");
 326         LoadStaticDir(static_dirs[2], StaticFilemappings[2], "");
 327         LoadStaticDir(static_dirs[3], StaticFilemappings[3], "");
 328
 329         WebcitAddUrlHandler(HKEY("robots.txt"), "", 0, robots_txt, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC|LOGCHATTY);
 330         WebcitAddUrlHandler(HKEY("favicon.ico"), "", 0, output_flat_static, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC|LOGCHATTY);
 331         WebcitAddUrlHandler(HKEY("static"), "", 0, output_static_0, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC|LOGCHATTY);
 332         WebcitAddUrlHandler(HKEY("static.local"), "", 0, output_static_1, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC|LOGCHATTY);
 333         WebcitAddUrlHandler(HKEY("tinymce"), "", 0, output_static_2, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC|LOGCHATTY);
 334         WebcitAddUrlHandler(HKEY("tiny_mce"), "", 0, output_static_2, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC|LOGCHATTY);
 335 }