webcit/static.c

   1 /*
   2  * $Id: webcit.c 7459 2009-05-17 08:34:33Z dothebart $
   3  *
   4  * This is the main transaction loop of the web service.  It maintains a
   5  * persistent session to the Citadel server, handling HTTP WebCit requests as
   6  * they arrive and presenting a user interface.
   7  */
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <dirent.h>
  11 #include <errno.h>
  12
  13 #include <unistd.h>
  14 #include <stdio.h>
  15 #include <stdarg.h>
  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                         wprintf("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                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
  50                 end_burst();
  51         } else {
  52                 len = strlen (what);
  53                 content_type = GuessMimeByFilename(what, len);
  54
  55                 if (fstat(fd, &statbuf) == -1) {
  56                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
  57                         hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
  58                         hprintf("Content-Type: text/plain\r\n");
  59                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
  60                         end_burst();
  61                         return;
  62                 }
  63
  64                 count = 0;
  65                 bytes = statbuf.st_size;
  66
  67                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
  68                 {
  69                         if (fd > 0) close(fd);
  70                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
  71                                 hprintf("HTTP/1.1 500 internal server error \r\n");
  72                                 hprintf("Content-Type: text/plain\r\n");
  73                                 end_burst();
  74                                 return;
  75                 }
  76
  77
  78                 close(fd);
  79 #ifndef TECH_PREVIEW
  80                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
  81 #endif
  82                 http_transmit_thing(content_type, 2);
  83         }
  84         if (yesbstr("force_close_session")) {
  85                 end_webcit_session();
  86         }
  87 }
  88
  89
  90 int LoadStaticDir(const char *DirName, HashList *DirList, const char *RelDir)
  91 {
  92         char dirname[PATH_MAX];
  93         char reldir[PATH_MAX];
  94         StrBuf *FileName = NULL;
  95         StrBuf *Dir = NULL;
  96         StrBuf *WebDir = NULL;
  97         StrBuf *OneWebName = NULL;
  98         DIR *filedir = NULL;
  99         struct dirent d;
 100         struct dirent *filedir_entry;
 101         int d_namelen;
 102         int d_without_ext;
 103         int istoplevel;
 104
 105         filedir = opendir (DirName);
 106         if (filedir == NULL) {
 107                 return 0;
 108         }
 109
 110         Dir = NewStrBufPlain(DirName, -1);
 111         WebDir = NewStrBufPlain(RelDir, -1);
 112         istoplevel = IsEmptyStr(RelDir);
 113         OneWebName = NewStrBuf();
 114
 115         while ((readdir_r(filedir, &d, &filedir_entry) == 0) &&
 116                (filedir_entry != NULL))
 117         {
 118                 char *PStart;
 119 #ifdef _DIRENT_HAVE_D_NAMELEN
 120                 d_namelen = filedir_entry->d_namelen;
 121 #else
 122                 d_namelen = strlen(filedir_entry->d_name);
 123 #endif
 124                 d_without_ext = d_namelen;
 125
 126                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 127                         continue; /* Ignore backup files... */
 128
 129                 if ((d_namelen == 1) &&
 130                     (filedir_entry->d_name[0] == '.'))
 131                         continue;
 132
 133                 if ((d_namelen == 2) &&
 134                     (filedir_entry->d_name[0] == '.') &&
 135                     (filedir_entry->d_name[1] == '.'))
 136                         continue;
 137
 138                 switch (filedir_entry->d_type)
 139                 {
 140                 case DT_DIR:
 141                         /* Skip directories we are not interested in... */
 142                         if ((strcmp(filedir_entry->d_name, ".svn") == 0) ||
 143                             (strcmp(filedir_entry->d_name, "t") == 0))
 144                                 break;
 145                         snprintf(dirname, PATH_MAX, "%s/%s/",
 146                                  DirName, filedir_entry->d_name);
 147                         if (istoplevel)
 148                                 snprintf(reldir, PATH_MAX, "%s/",
 149                                          filedir_entry->d_name);
 150                         else
 151                                 snprintf(reldir, PATH_MAX, "%s/%s/",
 152                                          RelDir, filedir_entry->d_name);
 153                         StripSlashes(dirname, 1);
 154                         StripSlashes(reldir, 1);
 155                         LoadStaticDir(dirname, DirList, reldir);
 156                         break;
 157                 case DT_LNK: /* TODO: check whether its a file or a directory */
 158                 case DT_REG:
 159                         PStart = filedir_entry->d_name;
 160                         FileName = NewStrBufDup(Dir);
 161                         if (ChrPtr(FileName) [ StrLength(FileName) - 1] != '/')
 162                                 StrBufAppendBufPlain(FileName, "/", 1, 0);
 163                         StrBufAppendBufPlain(FileName, filedir_entry->d_name, d_namelen, 0);
 164
 165                         FlushStrBuf(OneWebName);
 166                         StrBufAppendBuf(OneWebName, WebDir, 0);
 167                         if ((StrLength(OneWebName) != 0) &&
 168                             (ChrPtr(OneWebName) [ StrLength(OneWebName) - 1] != '/'))
 169                                 StrBufAppendBufPlain(OneWebName, "/", 1, 0);
 170                         StrBufAppendBufPlain(OneWebName, filedir_entry->d_name, d_namelen, 0);
 171
 172                         Put(DirList, SKEY(OneWebName), FileName, HFreeStrBuf);
 173 /*                      printf("[%s | %s]  \n", ChrPtr(OneWebName), ChrPtr(FileName));*/
 174                         break;
 175                 default:
 176                         break;
 177                 }
 178
 179
 180         }
 181         closedir(filedir);
 182         FreeStrBuf(&Dir);
 183         FreeStrBuf(&WebDir);
 184         FreeStrBuf(&OneWebName);
 185         return 1;
 186 }
 187
 188
 189 void output_flat_static(void)
 190 {
 191         wcsession *WCC = WC;
 192         void *vFile;
 193         StrBuf *File;
 194
 195         if (GetHash(StaticFilemappings[0], SKEY(WCC->Hdr->HR.Handler->Name), &vFile) &&
 196             (vFile != NULL))
 197         {
 198                 File = (StrBuf*) vFile;
 199                 output_static(ChrPtr(vFile));
 200         }
 201 }
 202
 203 extern void do_404(void);
 204
 205 void output_static_safe(HashList *DirList)
 206 {
 207         wcsession *WCC = WC;
 208         void *vFile;
 209         StrBuf *File;
 210
 211         if (GetHash(DirList, SKEY(WCC->Hdr->HR.ReqLine), &vFile) &&
 212             (vFile != NULL))
 213         {
 214                 File = (StrBuf*) vFile;
 215                 output_static(ChrPtr(vFile));
 216         }
 217         else {
 218                 lprintf(1, "output_static_safe() file %s not found. \n",
 219                         ChrPtr(WCC->Hdr->HR.ReqLine));
 220 ///TODO: detect image & output blank image
 221                 do_404();
 222         }
 223 }
 224 void output_static_0(void)
 225 {
 226         output_static_safe(StaticFilemappings[0]);
 227 }
 228 void output_static_1(void)
 229 {
 230         output_static_safe(StaticFilemappings[1]);
 231 }
 232 void output_static_2(void)
 233 {
 234         output_static_safe(StaticFilemappings[2]);
 235 }
 236 void output_static_3(void)
 237 {
 238         output_static_safe(StaticFilemappings[3]);
 239 }
 240
 241 void
 242 ServerStartModule_STATIC
 243 (void)
 244 {
 245         StaticFilemappings[0] = NewHash(1, NULL);
 246         StaticFilemappings[1] = NewHash(1, NULL);
 247         StaticFilemappings[2] = NewHash(1, NULL);
 248         StaticFilemappings[3] = NewHash(1, NULL);
 249 }
 250 void
 251 ServerShutdownModule_STATIC
 252 (void)
 253 {
 254         DeleteHash(&StaticFilemappings[0]);
 255         DeleteHash(&StaticFilemappings[1]);
 256         DeleteHash(&StaticFilemappings[2]);
 257         DeleteHash(&StaticFilemappings[3]);
 258 }
 259
 260
 261 void
 262 InitModule_STATIC
 263 (void)
 264 {
 265         LoadStaticDir(static_dirs[0], StaticFilemappings[0], "");
 266         LoadStaticDir(static_dirs[1], StaticFilemappings[1], "");
 267         LoadStaticDir(static_dirs[2], StaticFilemappings[2], "");
 268         LoadStaticDir(static_dirs[3], StaticFilemappings[3], "");
 269
 270         WebcitAddUrlHandler(HKEY("robots.txt"), output_flat_static, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 271         WebcitAddUrlHandler(HKEY("favicon.ico"), output_flat_static, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 272         WebcitAddUrlHandler(HKEY("static"), output_static_0, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 273         WebcitAddUrlHandler(HKEY("static.local"), output_static_1, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 274         WebcitAddUrlHandler(HKEY("tinymce"), output_static_2, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 275         WebcitAddUrlHandler(HKEY("tiny_mce"), output_static_2, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 276 }