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                         return;
  64                 }
  65
  66                 count = 0;
  67                 bytes = statbuf.st_size;
  68
  69                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
  70                 {
  71                         if (fd > 0) close(fd);
  72                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
  73                                 hprintf("HTTP/1.1 500 internal server error \r\n");
  74                                 hprintf("Content-Type: text/plain\r\n");
  75                                 end_burst();
  76                                 return;
  77                 }
  78
  79
  80                 close(fd);
  81 #ifndef TECH_PREVIEW
  82                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
  83 #endif
  84                 http_transmit_thing(content_type, 2);
  85         }
  86         if (yesbstr("force_close_session")) {
  87                 end_webcit_session();
  88         }
  89 }
  90
  91
  92 int LoadStaticDir(const char *DirName, HashList *DirList, const char *RelDir)
  93 {
  94         char dirname[PATH_MAX];
  95         char reldir[PATH_MAX];
  96         StrBuf *FileName = NULL;
  97         StrBuf *Dir = NULL;
  98         StrBuf *WebDir = NULL;
  99         StrBuf *OneWebName = NULL;
 100         DIR *filedir = NULL;
 101         struct dirent *d;
 102         struct dirent *filedir_entry;
 103         int d_type = 0;
 104         int d_namelen;
 105         int d_without_ext;
 106         int istoplevel;
 107
 108         filedir = opendir (DirName);
 109         if (filedir == NULL) {
 110                 return 0;
 111         }
 112
 113         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 114         if (d == NULL) {
 115                 return 0;
 116         }
 117
 118         Dir = NewStrBufPlain(DirName, -1);
 119         WebDir = NewStrBufPlain(RelDir, -1);
 120         istoplevel = IsEmptyStr(RelDir);
 121         OneWebName = NewStrBuf();
 122
 123         while ((readdir_r(filedir, d, &filedir_entry) == 0) &&
 124                (filedir_entry != NULL))
 125         {
 126                 char *PStart;
 127 #ifdef _DIRENT_HAVE_D_NAMELEN
 128                 d_namelen = filedir_entry->d_namelen;
 129                 d_type = filedir_entry->d_type;
 130 #else
 131
 132 #ifndef DT_UNKNOWN
 133 #define DT_UNKNOWN     0
 134 #define DT_DIR         4
 135 #define DT_REG         8
 136 #define DT_LNK         10
 137
 138 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
 139 #define DTTOIF(dirtype)        ((dirtype) << 12)
 140 #endif
 141                 d_namelen = strlen(filedir_entry->d_name);
 142                 d_type = DT_UNKNOWN;
 143 #endif
 144                 d_without_ext = d_namelen;
 145
 146                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 147                         continue; /* Ignore backup files... */
 148
 149                 if ((d_namelen == 1) &&
 150                     (filedir_entry->d_name[0] == '.'))
 151                         continue;
 152
 153                 if ((d_namelen == 2) &&
 154                     (filedir_entry->d_name[0] == '.') &&
 155                     (filedir_entry->d_name[1] == '.'))
 156                         continue;
 157
 158                 if (d_type == DT_UNKNOWN) {
 159                         struct stat s;
 160                         char path[PATH_MAX];
 161                         snprintf(path, PATH_MAX, "%s/%s",
 162                                 DirName, filedir_entry->d_name);
 163                         if (stat(path, &s) == 0) {
 164                                 d_type = IFTODT(s.st_mode);
 165                         }
 166                 }
 167
 168                 switch (d_type)
 169                 {
 170                 case DT_DIR:
 171                         /* Skip directories we are not interested in... */
 172                         if ((strcmp(filedir_entry->d_name, ".svn") == 0) ||
 173                             (strcmp(filedir_entry->d_name, "t") == 0))
 174                                 break;
 175                         snprintf(dirname, PATH_MAX, "%s/%s/",
 176                                  DirName, filedir_entry->d_name);
 177                         if (istoplevel)
 178                                 snprintf(reldir, PATH_MAX, "%s/",
 179                                          filedir_entry->d_name);
 180                         else
 181                                 snprintf(reldir, PATH_MAX, "%s/%s/",
 182                                          RelDir, filedir_entry->d_name);
 183                         StripSlashes(dirname, 1);
 184                         StripSlashes(reldir, 1);
 185                         LoadStaticDir(dirname, DirList, reldir);
 186                         break;
 187                 case DT_LNK: /* TODO: check whether its a file or a directory */
 188                 case DT_REG:
 189                         PStart = filedir_entry->d_name;
 190                         FileName = NewStrBufDup(Dir);
 191                         if (ChrPtr(FileName) [ StrLength(FileName) - 1] != '/')
 192                                 StrBufAppendBufPlain(FileName, "/", 1, 0);
 193                         StrBufAppendBufPlain(FileName, filedir_entry->d_name, d_namelen, 0);
 194
 195                         FlushStrBuf(OneWebName);
 196                         StrBufAppendBuf(OneWebName, WebDir, 0);
 197                         if ((StrLength(OneWebName) != 0) &&
 198                             (ChrPtr(OneWebName) [ StrLength(OneWebName) - 1] != '/'))
 199                                 StrBufAppendBufPlain(OneWebName, "/", 1, 0);
 200                         StrBufAppendBufPlain(OneWebName, filedir_entry->d_name, d_namelen, 0);
 201
 202                         Put(DirList, SKEY(OneWebName), FileName, HFreeStrBuf);
 203                         /* lprintf(9, "[%s | %s]\n", ChrPtr(OneWebName), ChrPtr(FileName)); */
 204                         break;
 205                 default:
 206                         break;
 207                 }
 208
 209
 210         }
 211         free(d);
 212         closedir(filedir);
 213         FreeStrBuf(&Dir);
 214         FreeStrBuf(&WebDir);
 215         FreeStrBuf(&OneWebName);
 216         return 1;
 217 }
 218
 219
 220 void output_flat_static(void)
 221 {
 222         wcsession *WCC = WC;
 223         void *vFile;
 224         StrBuf *File;
 225
 226         if (GetHash(StaticFilemappings[0], SKEY(WCC->Hdr->HR.Handler->Name), &vFile) &&
 227             (vFile != NULL))
 228         {
 229                 File = (StrBuf*) vFile;
 230                 output_static(ChrPtr(vFile));
 231         }
 232 }
 233
 234 extern void do_404(void);
 235
 236 void output_static_safe(HashList *DirList)
 237 {
 238         wcsession *WCC = WC;
 239         void *vFile;
 240         StrBuf *File;
 241
 242         if (GetHash(DirList, SKEY(WCC->Hdr->HR.ReqLine), &vFile) &&
 243             (vFile != NULL))
 244         {
 245                 File = (StrBuf*) vFile;
 246                 output_static(ChrPtr(vFile));
 247         }
 248         else {
 249                 lprintf(1, "output_static_safe() file %s not found. \n",
 250                         ChrPtr(WCC->Hdr->HR.ReqLine));
 251 ///TODO: detect image & output blank image
 252                 do_404();
 253         }
 254 }
 255 void output_static_0(void)
 256 {
 257         output_static_safe(StaticFilemappings[0]);
 258 }
 259 void output_static_1(void)
 260 {
 261         output_static_safe(StaticFilemappings[1]);
 262 }
 263 void output_static_2(void)
 264 {
 265         output_static_safe(StaticFilemappings[2]);
 266 }
 267 void output_static_3(void)
 268 {
 269         output_static_safe(StaticFilemappings[3]);
 270 }
 271
 272 void
 273 ServerStartModule_STATIC
 274 (void)
 275 {
 276         StaticFilemappings[0] = NewHash(1, NULL);
 277         StaticFilemappings[1] = NewHash(1, NULL);
 278         StaticFilemappings[2] = NewHash(1, NULL);
 279         StaticFilemappings[3] = NewHash(1, NULL);
 280 }
 281 void
 282 ServerShutdownModule_STATIC
 283 (void)
 284 {
 285         DeleteHash(&StaticFilemappings[0]);
 286         DeleteHash(&StaticFilemappings[1]);
 287         DeleteHash(&StaticFilemappings[2]);
 288         DeleteHash(&StaticFilemappings[3]);
 289 }
 290
 291
 292 void
 293 InitModule_STATIC
 294 (void)
 295 {
 296         LoadStaticDir(static_dirs[0], StaticFilemappings[0], "");
 297         LoadStaticDir(static_dirs[1], StaticFilemappings[1], "");
 298         LoadStaticDir(static_dirs[2], StaticFilemappings[2], "");
 299         LoadStaticDir(static_dirs[3], StaticFilemappings[3], "");
 300
 301         WebcitAddUrlHandler(HKEY("robots.txt"), "", 0, output_flat_static, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC|LOGCHATTY);
 302         WebcitAddUrlHandler(HKEY("favicon.ico"), "", 0, output_flat_static, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC|LOGCHATTY);
 303         WebcitAddUrlHandler(HKEY("static"), "", 0, output_static_0, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC|LOGCHATTY);
 304         WebcitAddUrlHandler(HKEY("static.local"), "", 0, output_static_1, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC|LOGCHATTY);
 305         WebcitAddUrlHandler(HKEY("tinymce"), "", 0, output_static_2, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC|LOGCHATTY);
 306         WebcitAddUrlHandler(HKEY("tiny_mce"), "", 0, output_static_2, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC|LOGCHATTY);
 307 }