src/mod_accesslog.c

   1 #include "first.h"
   2
   3 #include "base.h"
   4 #include "log.h"
   5 #include "buffer.h"
   6
   7 #include "plugin.h"
   8
   9 #include "inet_ntop_cache.h"
  10
  11 #include "sys-socket.h"
  12
  13 #include <sys/types.h>
  14 #include <sys/stat.h>
  15
  16 #include <ctype.h>
  17 #include <stdlib.h>
  18 #include <string.h>
  19 #include <fcntl.h>
  20 #include <unistd.h>
  21 #include <errno.h>
  22 #include <time.h>
  23
  24 #include <stdio.h>
  25
  26 #ifdef HAVE_SYSLOG_H
  27 # include <syslog.h>
  28 #endif
  29
  30 typedef struct {
  31         char key;
  32         enum {
  33                 FORMAT_UNSET,
  34                         FORMAT_UNSUPPORTED,
  35                         FORMAT_PERCENT,
  36                         FORMAT_REMOTE_HOST,
  37                         FORMAT_REMOTE_IDENT,
  38                         FORMAT_REMOTE_USER,
  39                         FORMAT_TIMESTAMP,
  40                         FORMAT_REQUEST_LINE,
  41                         FORMAT_STATUS,
  42                         FORMAT_BYTES_OUT_NO_HEADER,
  43                         FORMAT_HEADER,
  44
  45                         FORMAT_REMOTE_ADDR,
  46                         FORMAT_LOCAL_ADDR,
  47                         FORMAT_COOKIE,
  48                         FORMAT_TIME_USED_MS,
  49                         FORMAT_ENV,
  50                         FORMAT_FILENAME,
  51                         FORMAT_REQUEST_PROTOCOL,
  52                         FORMAT_REQUEST_METHOD,
  53                         FORMAT_SERVER_PORT,
  54                         FORMAT_QUERY_STRING,
  55                         FORMAT_TIME_USED,
  56                         FORMAT_URL,
  57                         FORMAT_SERVER_NAME,
  58                         FORMAT_HTTP_HOST,
  59                         FORMAT_CONNECTION_STATUS,
  60                         FORMAT_BYTES_IN,
  61                         FORMAT_BYTES_OUT,
  62
  63                         FORMAT_RESPONSE_HEADER
  64         } type;
  65 } format_mapping;
  66
  67 /**
  68  *
  69  *
  70  * "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\""
  71  *
  72  */
  73
  74 static const format_mapping fmap[] =
  75 {
  76         { '%', FORMAT_PERCENT },
  77         { 'h', FORMAT_REMOTE_HOST },
  78         { 'l', FORMAT_REMOTE_IDENT },
  79         { 'u', FORMAT_REMOTE_USER },
  80         { 't', FORMAT_TIMESTAMP },
  81         { 'r', FORMAT_REQUEST_LINE },
  82         { 's', FORMAT_STATUS },
  83         { 'b', FORMAT_BYTES_OUT_NO_HEADER },
  84         { 'i', FORMAT_HEADER },
  85
  86         { 'a', FORMAT_REMOTE_ADDR },
  87         { 'A', FORMAT_LOCAL_ADDR },
  88         { 'B', FORMAT_BYTES_OUT_NO_HEADER },
  89         { 'C', FORMAT_COOKIE },
  90         { 'D', FORMAT_TIME_USED_MS },
  91         { 'e', FORMAT_ENV },
  92         { 'f', FORMAT_FILENAME },
  93         { 'H', FORMAT_REQUEST_PROTOCOL },
  94         { 'm', FORMAT_REQUEST_METHOD },
  95         { 'n', FORMAT_UNSUPPORTED }, /* we have no notes */
  96         { 'p', FORMAT_SERVER_PORT },
  97         { 'P', FORMAT_UNSUPPORTED }, /* we are only one process */
  98         { 'q', FORMAT_QUERY_STRING },
  99         { 'T', FORMAT_TIME_USED },
 100         { 'U', FORMAT_URL }, /* w/o querystring */
 101         { 'v', FORMAT_SERVER_NAME },
 102         { 'V', FORMAT_HTTP_HOST },
 103         { 'X', FORMAT_CONNECTION_STATUS },
 104         { 'I', FORMAT_BYTES_IN },
 105         { 'O', FORMAT_BYTES_OUT },
 106
 107         { 'o', FORMAT_RESPONSE_HEADER },
 108
 109         { '\0', FORMAT_UNSET }
 110 };
 111
 112
 113 typedef struct {
 114         enum { FIELD_UNSET, FIELD_STRING, FIELD_FORMAT } type;
 115
 116         buffer *string;
 117         int field;
 118 } format_field;
 119
 120 typedef struct {
 121         format_field **ptr;
 122
 123         size_t used;
 124         size_t size;
 125 } format_fields;
 126
 127 typedef struct {
 128         buffer *access_logfile;
 129         int    log_access_fd;
 130         buffer *access_logbuffer; /* each logfile has a separate buffer */
 131
 132         unsigned short use_syslog; /* syslog has global buffer */
 133         unsigned short syslog_level;
 134
 135         buffer *format;
 136
 137         time_t last_generated_accesslog_ts;
 138         time_t *last_generated_accesslog_ts_ptr;
 139
 140         buffer *ts_accesslog_str;
 141         buffer *ts_accesslog_fmt_str;
 142         unsigned short append_tz_offset;
 143
 144         format_fields *parsed_format;
 145 } plugin_config;
 146
 147 typedef struct {
 148         PLUGIN_DATA;
 149
 150         plugin_config **config_storage;
 151         plugin_config conf;
 152
 153         buffer *syslog_logbuffer; /* syslog has global buffer. no caching, always written directly */
 154 } plugin_data;
 155
 156 INIT_FUNC(mod_accesslog_init) {
 157         plugin_data *p;
 158
 159         p = calloc(1, sizeof(*p));
 160         p->syslog_logbuffer = buffer_init();
 161
 162         return p;
 163 }
 164
 165 static void accesslog_write_all(server *srv, const buffer *filename, int fd, const void* buf, size_t count) {
 166         if (-1 == write_all(fd, buf, count)) {
 167                 log_error_write(srv, __FILE__, __LINE__, "sbs",
 168                         "writing access log entry failed:", filename, strerror(errno));
 169         }
 170 }
 171
 172 static void accesslog_append_escaped(buffer *dest, buffer *str) {
 173         char *ptr, *start, *end;
 174
 175         /* replaces non-printable chars with \xHH where HH is the hex representation of the byte */
 176         /* exceptions: " => \", \ => \\, whitespace chars => \n \t etc. */
 177         if (buffer_string_is_empty(str)) return;
 178         buffer_string_prepare_append(dest, buffer_string_length(str));
 179
 180         for (ptr = start = str->ptr, end = str->ptr + buffer_string_length(str); ptr < end; ptr++) {
 181                 unsigned char const c = (unsigned char) *ptr;
 182                 if (c >= ' ' && c <= '~' && c != '"' && c != '\\') {
 183                         /* nothing to change, add later as one block */
 184                 } else {
 185                         /* copy previous part */
 186                         if (start < ptr) {
 187                                 buffer_append_string_len(dest, start, ptr - start);
 188                         }
 189                         start = ptr + 1;
 190
 191                         switch (c) {
 192                         case '"':
 193                                 BUFFER_APPEND_STRING_CONST(dest, "\\\"");
 194                                 break;
 195                         case '\\':
 196                                 BUFFER_APPEND_STRING_CONST(dest, "\\\\");
 197                                 break;
 198                         case '\b':
 199                                 BUFFER_APPEND_STRING_CONST(dest, "\\b");
 200                                 break;
 201                         case '\n':
 202                                 BUFFER_APPEND_STRING_CONST(dest, "\\n");
 203                                 break;
 204                         case '\r':
 205                                 BUFFER_APPEND_STRING_CONST(dest, "\\r");
 206                                 break;
 207                         case '\t':
 208                                 BUFFER_APPEND_STRING_CONST(dest, "\\t");
 209                                 break;
 210                         case '\v':
 211                                 BUFFER_APPEND_STRING_CONST(dest, "\\v");
 212                                 break;
 213                         default: {
 214                                         /* non printable char => \xHH */
 215                                         char hh[5] = {'\\','x',0,0,0};
 216                                         char h = c / 16;
 217                                         hh[2] = (h > 9) ? (h - 10 + 'A') : (h + '0');
 218                                         h = c % 16;
 219                                         hh[3] = (h > 9) ? (h - 10 + 'A') : (h + '0');
 220                                         buffer_append_string_len(dest, &hh[0], 4);
 221                                 }
 222                                 break;
 223                         }
 224                 }
 225         }
 226
 227         if (start < end) {
 228                 buffer_append_string_len(dest, start, end - start);
 229         }
 230 }
 231
 232 static int accesslog_parse_format(server *srv, format_fields *fields, buffer *format) {
 233         size_t i, j, k = 0, start = 0;
 234
 235         if (buffer_is_empty(format)) return -1;
 236
 237         for (i = 0; i < buffer_string_length(format); i++) {
 238                 switch(format->ptr[i]) {
 239                 case '%':
 240                         if (i > 0 && start != i) {
 241                                 /* copy the string before this % */
 242                                 if (fields->size == 0) {
 243                                         fields->size = 16;
 244                                         fields->used = 0;
 245                                         fields->ptr = malloc(fields->size * sizeof(format_field * ));
 246                                 } else if (fields->used == fields->size) {
 247                                         fields->size += 16;
 248                                         fields->ptr = realloc(fields->ptr, fields->size * sizeof(format_field * ));
 249                                 }
 250
 251                                 fields->ptr[fields->used] = malloc(sizeof(format_field));
 252                                 fields->ptr[fields->used]->type = FIELD_STRING;
 253                                 fields->ptr[fields->used]->string = buffer_init();
 254
 255                                 buffer_copy_string_len(fields->ptr[fields->used]->string, format->ptr + start, i - start);
 256
 257                                 fields->used++;
 258                         }
 259
 260                         /* we need a new field */
 261
 262                         if (fields->size == 0) {
 263                                 fields->size = 16;
 264                                 fields->used = 0;
 265                                 fields->ptr = malloc(fields->size * sizeof(format_field * ));
 266                         } else if (fields->used == fields->size) {
 267                                 fields->size += 16;
 268                                 fields->ptr = realloc(fields->ptr, fields->size * sizeof(format_field * ));
 269                         }
 270
 271                         /* search for the terminating command */
 272                         switch (format->ptr[i+1]) {
 273                         case '>':
 274                         case '<':
 275                                 /* after the } has to be a character */
 276                                 if (format->ptr[i+2] == '\0') {
 277                                         log_error_write(srv, __FILE__, __LINE__, "s", "%< and %> have to be followed by a format-specifier");
 278                                         return -1;
 279                                 }
 280
 281
 282                                 for (j = 0; fmap[j].key != '\0'; j++) {
 283                                         if (fmap[j].key != format->ptr[i+2]) continue;
 284
 285                                         /* found key */
 286
 287                                         fields->ptr[fields->used] = malloc(sizeof(format_field));
 288                                         fields->ptr[fields->used]->type = FIELD_FORMAT;
 289                                         fields->ptr[fields->used]->field = fmap[j].type;
 290                                         fields->ptr[fields->used]->string = NULL;
 291
 292                                         fields->used++;
 293
 294                                         break;
 295                                 }
 296
 297                                 if (fmap[j].key == '\0') {
 298                                         log_error_write(srv, __FILE__, __LINE__, "s", "%< and %> have to be followed by a valid format-specifier");
 299                                         return -1;
 300                                 }
 301
 302                                 start = i + 3;
 303                                 i = start - 1; /* skip the string */
 304
 305                                 break;
 306                         case '{':
 307                                 /* go forward to } */
 308
 309                                 for (k = i+2; k < buffer_string_length(format); k++) {
 310                                         if (format->ptr[k] == '}') break;
 311                                 }
 312
 313                                 if (k == buffer_string_length(format)) {
 314                                         log_error_write(srv, __FILE__, __LINE__, "s", "%{ has to be terminated by a }");
 315                                         return -1;
 316                                 }
 317
 318                                 /* after the } has to be a character */
 319                                 if (format->ptr[k+1] == '\0') {
 320                                         log_error_write(srv, __FILE__, __LINE__, "s", "%{...} has to be followed by a format-specifier");
 321                                         return -1;
 322                                 }
 323
 324                                 if (k == i + 2) {
 325                                         log_error_write(srv, __FILE__, __LINE__, "s", "%{...} has to be contain a string");
 326                                         return -1;
 327                                 }
 328
 329                                 for (j = 0; fmap[j].key != '\0'; j++) {
 330                                         if (fmap[j].key != format->ptr[k+1]) continue;
 331
 332                                         /* found key */
 333
 334                                         fields->ptr[fields->used] = malloc(sizeof(format_field));
 335                                         fields->ptr[fields->used]->type = FIELD_FORMAT;
 336                                         fields->ptr[fields->used]->field = fmap[j].type;
 337                                         fields->ptr[fields->used]->string = buffer_init();
 338
 339                                         buffer_copy_string_len(fields->ptr[fields->used]->string, format->ptr + i + 2, k - (i + 2));
 340
 341                                         fields->used++;
 342
 343                                         break;
 344                                 }
 345
 346                                 if (fmap[j].key == '\0') {
 347                                         log_error_write(srv, __FILE__, __LINE__, "s", "%{...} has to be followed by a valid format-specifier");
 348                                         return -1;
 349                                 }
 350
 351                                 start = k + 2;
 352                                 i = start - 1; /* skip the string */
 353
 354                                 break;
 355                         default:
 356                                 /* after the % has to be a character */
 357                                 if (format->ptr[i+1] == '\0') {
 358                                         log_error_write(srv, __FILE__, __LINE__, "s", "% has to be followed by a format-specifier");
 359                                         return -1;
 360                                 }
 361
 362                                 for (j = 0; fmap[j].key != '\0'; j++) {
 363                                         if (fmap[j].key != format->ptr[i+1]) continue;
 364
 365                                         /* found key */
 366
 367                                         fields->ptr[fields->used] = malloc(sizeof(format_field));
 368                                         fields->ptr[fields->used]->type = FIELD_FORMAT;
 369                                         fields->ptr[fields->used]->field = fmap[j].type;
 370                                         fields->ptr[fields->used]->string = NULL;
 371
 372                                         fields->used++;
 373
 374                                         break;
 375                                 }
 376
 377                                 if (fmap[j].key == '\0') {
 378                                         log_error_write(srv, __FILE__, __LINE__, "s", "% has to be followed by a valid format-specifier");
 379                                         return -1;
 380                                 }
 381
 382                                 start = i + 2;
 383                                 i = start - 1; /* skip the string */
 384
 385                                 break;
 386                         }
 387
 388                         break;
 389                 }
 390         }
 391
 392         if (start < i) {
 393                 /* copy the string */
 394                 if (fields->size == 0) {
 395                         fields->size = 16;
 396                         fields->used = 0;
 397                         fields->ptr = malloc(fields->size * sizeof(format_field * ));
 398                 } else if (fields->used == fields->size) {
 399                         fields->size += 16;
 400                         fields->ptr = realloc(fields->ptr, fields->size * sizeof(format_field * ));
 401                 }
 402
 403                 fields->ptr[fields->used] = malloc(sizeof(format_field));
 404                 fields->ptr[fields->used]->type = FIELD_STRING;
 405                 fields->ptr[fields->used]->string = buffer_init();
 406
 407                 buffer_copy_string_len(fields->ptr[fields->used]->string, format->ptr + start, i - start);
 408
 409                 fields->used++;
 410         }
 411
 412         return 0;
 413 }
 414
 415 FREE_FUNC(mod_accesslog_free) {
 416         plugin_data *p = p_d;
 417         size_t i;
 418
 419         if (!p) return HANDLER_GO_ON;
 420
 421         if (p->config_storage) {
 422
 423                 for (i = 0; i < srv->config_context->used; i++) {
 424                         plugin_config *s = p->config_storage[i];
 425
 426                         if (NULL == s) continue;
 427
 428                         if (!buffer_string_is_empty(s->access_logbuffer)) {
 429                                 if (s->log_access_fd != -1) {
 430                                         accesslog_write_all(srv, s->access_logfile, s->log_access_fd, CONST_BUF_LEN(s->access_logbuffer));
 431                                 }
 432                         }
 433
 434                         if (s->log_access_fd != -1) close(s->log_access_fd);
 435
 436                         buffer_free(s->ts_accesslog_str);
 437                         buffer_free(s->ts_accesslog_fmt_str);
 438                         buffer_free(s->access_logbuffer);
 439                         buffer_free(s->format);
 440                         buffer_free(s->access_logfile);
 441
 442                         if (s->parsed_format) {
 443                                 size_t j;
 444                                 for (j = 0; j < s->parsed_format->used; j++) {
 445                                         if (s->parsed_format->ptr[j]->string) buffer_free(s->parsed_format->ptr[j]->string);
 446                                         free(s->parsed_format->ptr[j]);
 447                                 }
 448                                 free(s->parsed_format->ptr);
 449                                 free(s->parsed_format);
 450                         }
 451
 452                         free(s);
 453                 }
 454
 455                 free(p->config_storage);
 456         }
 457
 458         if (p->syslog_logbuffer) buffer_free(p->syslog_logbuffer);
 459         free(p);
 460
 461         return HANDLER_GO_ON;
 462 }
 463
 464 SETDEFAULTS_FUNC(log_access_open) {
 465         plugin_data *p = p_d;
 466         size_t i = 0;
 467
 468         config_values_t cv[] = {
 469                 { "accesslog.filename",             NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },
 470                 { "accesslog.use-syslog",           NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION },
 471                 { "accesslog.format",               NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },
 472                 { "accesslog.syslog-level",         NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION },
 473                 { NULL,                             NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
 474         };
 475
 476         if (!p) return HANDLER_ERROR;
 477
 478         p->config_storage = calloc(1, srv->config_context->used * sizeof(plugin_config *));
 479
 480         for (i = 0; i < srv->config_context->used; i++) {
 481                 data_config const* config = (data_config const*)srv->config_context->data[i];
 482                 plugin_config *s;
 483
 484                 s = calloc(1, sizeof(plugin_config));
 485                 s->access_logfile = buffer_init();
 486                 s->format = buffer_init();
 487                 s->access_logbuffer = buffer_init();
 488                 s->ts_accesslog_str = buffer_init();
 489                 s->ts_accesslog_fmt_str = buffer_init();
 490                 s->log_access_fd = -1;
 491                 s->last_generated_accesslog_ts = 0;
 492                 s->last_generated_accesslog_ts_ptr = &(s->last_generated_accesslog_ts);
 493                 s->syslog_level = LOG_INFO;
 494
 495
 496                 cv[0].destination = s->access_logfile;
 497                 cv[1].destination = &(s->use_syslog);
 498                 cv[2].destination = s->format;
 499                 cv[3].destination = &(s->syslog_level);
 500
 501                 p->config_storage[i] = s;
 502
 503                 if (0 != config_insert_values_global(srv, config->value, cv, i == 0 ? T_CONFIG_SCOPE_SERVER : T_CONFIG_SCOPE_CONNECTION)) {
 504                         return HANDLER_ERROR;
 505                 }
 506
 507                 if (i == 0 && buffer_string_is_empty(s->format)) {
 508                         /* set a default logfile string */
 509
 510                         buffer_copy_string_len(s->format, CONST_STR_LEN("%h %V %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\""));
 511                 }
 512
 513                 /* parse */
 514
 515                 if (!buffer_is_empty(s->format)) {
 516                         size_t j, count;
 517
 518                         s->parsed_format = calloc(1, sizeof(*(s->parsed_format)));
 519
 520                         if (-1 == accesslog_parse_format(srv, s->parsed_format, s->format)) {
 521
 522                                 log_error_write(srv, __FILE__, __LINE__, "sb",
 523                                                 "parsing accesslog-definition failed:", s->format);
 524
 525                                 return HANDLER_ERROR;
 526                         }
 527
 528                         /* make sure they didn't try to send the timestamp in twice...
 529                          * also, save the format string in a different variable (this
 530                          * will save a few conditionals later)
 531                          */
 532                         count = 0;
 533                         for (j = 0; j < s->parsed_format->used; j++) {
 534                                 if (FIELD_FORMAT == s->parsed_format->ptr[j]->type) {
 535                                         if (FORMAT_TIMESTAMP == s->parsed_format->ptr[j]->field) {
 536                                                 if (!buffer_string_is_empty(s->parsed_format->ptr[j]->string)) {
 537                                                         buffer_copy_string(s->ts_accesslog_fmt_str, s->parsed_format->ptr[j]->string->ptr);
 538                                                 }
 539
 540                                                 if (++count > 1) {
 541                                                         log_error_write(srv, __FILE__, __LINE__, "sb",
 542                                                                 "you may not use the timestamp twice in the same access log:", s->format);
 543
 544                                                         return HANDLER_ERROR;
 545                                                 }
 546                                         }
 547                                 }
 548                         }
 549
 550 #if 0
 551                         /* debugging */
 552                         for (j = 0; j < s->parsed_format->used; j++) {
 553                                 switch (s->parsed_format->ptr[j]->type) {
 554                                 case FIELD_FORMAT:
 555                                         log_error_write(srv, __FILE__, __LINE__, "ssds",
 556                                                         "config:", "format", s->parsed_format->ptr[j]->field,
 557                                                         s->parsed_format->ptr[j]->string ?
 558                                                         s->parsed_format->ptr[j]->string->ptr : "" );
 559                                         break;
 560                                 case FIELD_STRING:
 561                                         log_error_write(srv, __FILE__, __LINE__, "ssbs", "config:", "string '", s->parsed_format->ptr[j]->string, "'");
 562                                         break;
 563                                 default:
 564                                         break;
 565                                 }
 566                         }
 567 #endif
 568                 }
 569
 570                 s->append_tz_offset = 0;
 571                 if (buffer_string_is_empty(s->ts_accesslog_fmt_str)) {
 572 #if defined(HAVE_STRUCT_TM_GMTOFF)
 573                         BUFFER_COPY_STRING_CONST(s->ts_accesslog_fmt_str, "[%d/%b/%Y:%H:%M:%S ");
 574                         s->append_tz_offset = 1;
 575 #else
 576                         BUFFER_COPY_STRING_CONST(s->ts_accesslog_fmt_str, "[%d/%b/%Y:%H:%M:%S +0000]");
 577 #endif
 578                 }
 579
 580                 if (s->use_syslog) {
 581                         /* ignore the next checks */
 582                         continue;
 583                 }
 584
 585                 if (buffer_string_is_empty(s->access_logfile)) continue;
 586
 587                 if (srv->srvconf.preflight_check) continue;
 588
 589                 if (-1 == (s->log_access_fd = open_logfile_or_pipe(srv, s->access_logfile->ptr)))
 590                         return HANDLER_ERROR;
 591
 592         }
 593
 594         return HANDLER_GO_ON;
 595 }
 596
 597 SIGHUP_FUNC(log_access_cycle) {
 598         plugin_data *p = p_d;
 599         size_t i;
 600
 601         if (!p->config_storage) return HANDLER_GO_ON;
 602
 603         for (i = 0; i < srv->config_context->used; i++) {
 604                 plugin_config *s = p->config_storage[i];
 605
 606                 if (!buffer_string_is_empty(s->access_logbuffer)) {
 607                         if (s->log_access_fd != -1) {
 608                                 accesslog_write_all(srv, s->access_logfile, s->log_access_fd, CONST_BUF_LEN(s->access_logbuffer));
 609                         }
 610
 611                         buffer_reset(s->access_logbuffer);
 612                 }
 613
 614                 if (s->use_syslog == 0
 615                         && !buffer_string_is_empty(s->access_logfile)
 616                         && s->access_logfile->ptr[0] != '|') {
 617
 618                         if (-1 != s->log_access_fd) close(s->log_access_fd);
 619
 620                         if (-1 == (s->log_access_fd =
 621                                    open(s->access_logfile->ptr, O_APPEND | O_WRONLY | O_CREAT | O_LARGEFILE, 0644))) {
 622
 623                                 log_error_write(srv, __FILE__, __LINE__, "ss", "cycling access-log failed:", strerror(errno));
 624
 625                                 return HANDLER_ERROR;
 626                         }
 627                         fd_close_on_exec(s->log_access_fd);
 628                 }
 629         }
 630
 631         return HANDLER_GO_ON;
 632 }
 633
 634 #define PATCH(x) \
 635         p->conf.x = s->x;
 636 static int mod_accesslog_patch_connection(server *srv, connection *con, plugin_data *p) {
 637         size_t i, j;
 638         plugin_config *s = p->config_storage[0];
 639
 640         PATCH(access_logfile);
 641         PATCH(format);
 642         PATCH(log_access_fd);
 643         PATCH(last_generated_accesslog_ts_ptr);
 644         PATCH(access_logbuffer);
 645         PATCH(ts_accesslog_str);
 646         PATCH(ts_accesslog_fmt_str);
 647         PATCH(append_tz_offset);
 648         PATCH(parsed_format);
 649         PATCH(use_syslog);
 650         PATCH(syslog_level);
 651
 652         /* skip the first, the global context */
 653         for (i = 1; i < srv->config_context->used; i++) {
 654                 data_config *dc = (data_config *)srv->config_context->data[i];
 655                 s = p->config_storage[i];
 656
 657                 /* condition didn't match */
 658                 if (!config_check_cond(srv, con, dc)) continue;
 659
 660                 /* merge config */
 661                 for (j = 0; j < dc->value->used; j++) {
 662                         data_unset *du = dc->value->data[j];
 663
 664                         if (buffer_is_equal_string(du->key, CONST_STR_LEN("accesslog.filename"))) {
 665                                 PATCH(access_logfile);
 666                                 PATCH(log_access_fd);
 667                                 PATCH(access_logbuffer);
 668                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN("accesslog.format"))) {
 669                                 PATCH(format);
 670                                 PATCH(parsed_format);
 671                                 PATCH(last_generated_accesslog_ts_ptr);
 672                                 PATCH(ts_accesslog_str);
 673                                 PATCH(ts_accesslog_fmt_str);
 674                                 PATCH(append_tz_offset);
 675                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN("accesslog.use-syslog"))) {
 676                                 PATCH(use_syslog);
 677                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN("accesslog.syslog-level"))) {
 678                                 PATCH(syslog_level);
 679                         }
 680                 }
 681         }
 682
 683         return 0;
 684 }
 685 #undef PATCH
 686
 687 REQUESTDONE_FUNC(log_access_write) {
 688         plugin_data *p = p_d;
 689         buffer *b;
 690         size_t j;
 691
 692         int newts = 0;
 693         data_string *ds;
 694
 695         mod_accesslog_patch_connection(srv, con, p);
 696
 697         /* No output device, nothing to do */
 698         if (!p->conf.use_syslog && p->conf.log_access_fd == -1) return HANDLER_GO_ON;
 699
 700         if (p->conf.use_syslog) {
 701                 b = p->syslog_logbuffer;
 702         } else {
 703                 b = p->conf.access_logbuffer;
 704         }
 705
 706         if (buffer_is_empty(b)) {
 707                 buffer_string_set_length(b, 0);
 708         }
 709
 710         for (j = 0; j < p->conf.parsed_format->used; j++) {
 711                 switch(p->conf.parsed_format->ptr[j]->type) {
 712                 case FIELD_STRING:
 713                         buffer_append_string_buffer(b, p->conf.parsed_format->ptr[j]->string);
 714                         break;
 715                 case FIELD_FORMAT:
 716                         switch(p->conf.parsed_format->ptr[j]->field) {
 717                         case FORMAT_TIMESTAMP:
 718
 719                                 /* cache the generated timestamp */
 720                                 if (srv->cur_ts != *(p->conf.last_generated_accesslog_ts_ptr)) {
 721                                         struct tm tm;
 722 #if defined(HAVE_STRUCT_TM_GMTOFF)
 723                                         long scd, hrs, min;
 724 #endif
 725
 726                                         buffer_string_prepare_copy(p->conf.ts_accesslog_str, 255);
 727 #if defined(HAVE_STRUCT_TM_GMTOFF)
 728 # ifdef HAVE_LOCALTIME_R
 729                                         localtime_r(&(srv->cur_ts), &tm);
 730                                         buffer_append_strftime(p->conf.ts_accesslog_str, p->conf.ts_accesslog_fmt_str->ptr, &tm);
 731 # else /* HAVE_LOCALTIME_R */
 732                                         buffer_append_strftime(p->conf.ts_accesslog_str, p->conf.ts_accesslog_fmt_str->ptr, localtime(&(srv->cur_ts)));
 733 # endif /* HAVE_LOCALTIME_R */
 734
 735                                         if (p->conf.append_tz_offset) {
 736                                                 buffer_append_string_len(p->conf.ts_accesslog_str, tm.tm_gmtoff >= 0 ? "+" : "-", 1);
 737
 738                                                 scd = abs(tm.tm_gmtoff);
 739                                                 hrs = scd / 3600;
 740                                                 min = (scd % 3600) / 60;
 741
 742                                                 /* hours */
 743                                                 if (hrs < 10) buffer_append_string_len(p->conf.ts_accesslog_str, CONST_STR_LEN("0"));
 744                                                 buffer_append_int(p->conf.ts_accesslog_str, hrs);
 745
 746                                                 if (min < 10) buffer_append_string_len(p->conf.ts_accesslog_str, CONST_STR_LEN("0"));
 747                                                 buffer_append_int(p->conf.ts_accesslog_str, min);
 748                                                 buffer_append_string_len(p->conf.ts_accesslog_str, CONST_STR_LEN("]"));
 749                                         }
 750 #else /* HAVE_STRUCT_TM_GMTOFF */
 751 # ifdef HAVE_GMTIME_R
 752                                         gmtime_r(&(srv->cur_ts), &tm);
 753                                         buffer_append_strftime(p->conf.ts_accesslog_str, p->conf.ts_accesslog_fmt_str->ptr, &tm);
 754 # else /* HAVE_GMTIME_R */
 755                                         buffer_append_strftime(p->conf.ts_accesslog_str, p->conf.ts_accesslog_fmt_str->ptr, gmtime(&(srv->cur_ts)));
 756 # endif /* HAVE_GMTIME_R */
 757 #endif /* HAVE_STRUCT_TM_GMTOFF */
 758
 759                                         *(p->conf.last_generated_accesslog_ts_ptr) = srv->cur_ts;
 760                                         newts = 1;
 761                                 }
 762
 763                                 buffer_append_string_buffer(b, p->conf.ts_accesslog_str);
 764
 765                                 break;
 766                         case FORMAT_REMOTE_HOST:
 767
 768                                 /* handle inet_ntop cache */
 769
 770                                 buffer_append_string(b, inet_ntop_cache_get_ip(srv, &(con->dst_addr)));
 771
 772                                 break;
 773                         case FORMAT_REMOTE_IDENT:
 774                                 /* ident */
 775                                 buffer_append_string_len(b, CONST_STR_LEN("-"));
 776                                 break;
 777                         case FORMAT_REMOTE_USER:
 778                                 if (NULL != (ds = (data_string *)array_get_element(con->environment, "REMOTE_USER")) && !buffer_string_is_empty(ds->value)) {
 779                                         accesslog_append_escaped(b, ds->value);
 780                                 } else {
 781                                         buffer_append_string_len(b, CONST_STR_LEN("-"));
 782                                 }
 783                                 break;
 784                         case FORMAT_REQUEST_LINE:
 785                                 if (!buffer_string_is_empty(con->request.request_line)) {
 786                                         accesslog_append_escaped(b, con->request.request_line);
 787                                 }
 788                                 break;
 789                         case FORMAT_STATUS:
 790                                 buffer_append_int(b, con->http_status);
 791                                 break;
 792
 793                         case FORMAT_BYTES_OUT_NO_HEADER:
 794                                 if (con->bytes_written > 0) {
 795                                         buffer_append_int(b,
 796                                                             con->bytes_written - con->bytes_header <= 0 ? 0 : con->bytes_written - con->bytes_header);
 797                                 } else {
 798                                         buffer_append_string_len(b, CONST_STR_LEN("-"));
 799                                 }
 800                                 break;
 801                         case FORMAT_HEADER:
 802                                 if (NULL != (ds = (data_string *)array_get_element(con->request.headers, p->conf.parsed_format->ptr[j]->string->ptr))) {
 803                                         accesslog_append_escaped(b, ds->value);
 804                                 } else {
 805                                         buffer_append_string_len(b, CONST_STR_LEN("-"));
 806                                 }
 807                                 break;
 808                         case FORMAT_RESPONSE_HEADER:
 809                                 if (NULL != (ds = (data_string *)array_get_element(con->response.headers, p->conf.parsed_format->ptr[j]->string->ptr))) {
 810                                         accesslog_append_escaped(b, ds->value);
 811                                 } else {
 812                                         buffer_append_string_len(b, CONST_STR_LEN("-"));
 813                                 }
 814                                 break;
 815                         case FORMAT_ENV:
 816                                 if (NULL != (ds = (data_string *)array_get_element(con->environment, p->conf.parsed_format->ptr[j]->string->ptr))) {
 817                                         accesslog_append_escaped(b, ds->value);
 818                                 } else {
 819                                         buffer_append_string_len(b, CONST_STR_LEN("-"));
 820                                 }
 821                                 break;
 822                         case FORMAT_FILENAME:
 823                                 if (!buffer_string_is_empty(con->physical.path)) {
 824                                         buffer_append_string_buffer(b, con->physical.path);
 825                                 } else {
 826                                         buffer_append_string_len(b, CONST_STR_LEN("-"));
 827                                 }
 828                                 break;
 829                         case FORMAT_BYTES_OUT:
 830                                 if (con->bytes_written > 0) {
 831                                         buffer_append_int(b, con->bytes_written);
 832                                 } else {
 833                                         buffer_append_string_len(b, CONST_STR_LEN("-"));
 834                                 }
 835                                 break;
 836                         case FORMAT_BYTES_IN:
 837                                 if (con->bytes_read > 0) {
 838                                         buffer_append_int(b, con->bytes_read);
 839                                 } else {
 840                                         buffer_append_string_len(b, CONST_STR_LEN("-"));
 841                                 }
 842                                 break;
 843                         case FORMAT_TIME_USED:
 844                                 buffer_append_int(b, srv->cur_ts - con->request_start);
 845                                 break;
 846                         case FORMAT_SERVER_NAME:
 847                                 if (!buffer_string_is_empty(con->server_name)) {
 848                                         buffer_append_string_buffer(b, con->server_name);
 849                                 } else {
 850                                         buffer_append_string_len(b, CONST_STR_LEN("-"));
 851                                 }
 852                                 break;
 853                         case FORMAT_HTTP_HOST:
 854                                 if (!buffer_string_is_empty(con->uri.authority)) {
 855                                         accesslog_append_escaped(b, con->uri.authority);
 856                                 } else {
 857                                         buffer_append_string_len(b, CONST_STR_LEN("-"));
 858                                 }
 859                                 break;
 860                         case FORMAT_REQUEST_PROTOCOL:
 861                                 buffer_append_string_len(b,
 862                                         con->request.http_version == HTTP_VERSION_1_1 ? "HTTP/1.1" : "HTTP/1.0", 8);
 863                                 break;
 864                         case FORMAT_REQUEST_METHOD:
 865                                 buffer_append_string(b, get_http_method_name(con->request.http_method));
 866                                 break;
 867                         case FORMAT_PERCENT:
 868                                 buffer_append_string_len(b, CONST_STR_LEN("%"));
 869                                 break;
 870                         case FORMAT_SERVER_PORT:
 871                                 {
 872                                         const char *colon;
 873                                         buffer *srvtoken = ((server_socket*)(con->srv_socket))->srv_token;
 874                                         if (srvtoken->ptr[0] == '[') {
 875                                                 colon = strstr(srvtoken->ptr, "]:");
 876                                         } else {
 877                                                 colon = strchr(srvtoken->ptr, ':');
 878                                         }
 879                                         if (colon) {
 880                                                 buffer_append_string(b, colon+1);
 881                                         } else {
 882                                                 buffer_append_int(b, srv->srvconf.port);
 883                                         }
 884                                 }
 885                                 break;
 886                         case FORMAT_QUERY_STRING:
 887                                 accesslog_append_escaped(b, con->uri.query);
 888                                 break;
 889                         case FORMAT_URL:
 890                                 accesslog_append_escaped(b, con->uri.path_raw);
 891                                 break;
 892                         case FORMAT_CONNECTION_STATUS:
 893                                 switch(con->keep_alive) {
 894                                 case 0: buffer_append_string_len(b, CONST_STR_LEN("-")); break;
 895                                 default: buffer_append_string_len(b, CONST_STR_LEN("+")); break;
 896                                 }
 897                                 break;
 898                         default:
 899                                 /*
 900                                  { 'a', FORMAT_REMOTE_ADDR },
 901                                  { 'A', FORMAT_LOCAL_ADDR },
 902                                  { 'C', FORMAT_COOKIE },
 903                                  { 'D', FORMAT_TIME_USED_MS },
 904                                  */
 905
 906                                 break;
 907                         }
 908                         break;
 909                 default:
 910                         break;
 911                 }
 912         }
 913
 914         buffer_append_string_len(b, CONST_STR_LEN("\n"));
 915
 916         if (p->conf.use_syslog ||  /* syslog doesn't cache */
 917             (!buffer_string_is_empty(p->conf.access_logfile) && p->conf.access_logfile->ptr[0] == '|') || /* pipes don't cache */
 918             newts ||
 919             buffer_string_length(b) >= BUFFER_MAX_REUSE_SIZE) {
 920                 if (p->conf.use_syslog) {
 921 #ifdef HAVE_SYSLOG_H
 922                         if (!buffer_string_is_empty(b)) {
 923                                 /* syslog appends a \n on its own */
 924                                 buffer_string_set_length(b, buffer_string_length(b) - 1);
 925                                 syslog(p->conf.syslog_level, "%s", b->ptr);
 926                         }
 927 #endif
 928                 } else if (p->conf.log_access_fd != -1) {
 929                         accesslog_write_all(srv, p->conf.access_logfile, p->conf.log_access_fd, CONST_BUF_LEN(b));
 930                 }
 931                 buffer_reset(b);
 932         }
 933
 934         return HANDLER_GO_ON;
 935 }
 936
 937
 938 int mod_accesslog_plugin_init(plugin *p);
 939 int mod_accesslog_plugin_init(plugin *p) {
 940         p->version     = LIGHTTPD_VERSION_ID;
 941         p->name        = buffer_init_string("accesslog");
 942
 943         p->init        = mod_accesslog_init;
 944         p->set_defaults= log_access_open;
 945         p->cleanup     = mod_accesslog_free;
 946
 947         p->handle_request_done  = log_access_write;
 948         p->handle_sighup        = log_access_cycle;
 949
 950         p->data        = NULL;
 951
 952         return 0;
 953 }