release/src/router/nginx/src/http/modules/perl/ngx_http_perl_module.c

   1
   2 /*
   3  * Copyright (C) Igor Sysoev
   4  * Copyright (C) Nginx, Inc.
   5  */
   6
   7
   8 #include <ngx_config.h>
   9 #include <ngx_core.h>
  10 #include <ngx_http.h>
  11 #include <ngx_http_perl_module.h>
  12
  13
  14 typedef struct {
  15     PerlInterpreter   *perl;
  16     HV                *nginx;
  17     ngx_array_t       *modules;
  18     ngx_array_t       *requires;
  19 } ngx_http_perl_main_conf_t;
  20
  21
  22 typedef struct {
  23     SV                *sub;
  24     ngx_str_t          handler;
  25 } ngx_http_perl_loc_conf_t;
  26
  27
  28 typedef struct {
  29     SV                *sub;
  30     ngx_str_t          handler;
  31 } ngx_http_perl_variable_t;
  32
  33
  34 #if (NGX_HTTP_SSI)
  35 static ngx_int_t ngx_http_perl_ssi(ngx_http_request_t *r,
  36     ngx_http_ssi_ctx_t *ssi_ctx, ngx_str_t **params);
  37 #endif
  38
  39 static char *ngx_http_perl_init_interpreter(ngx_conf_t *cf,
  40     ngx_http_perl_main_conf_t *pmcf);
  41 static PerlInterpreter *ngx_http_perl_create_interpreter(ngx_conf_t *cf,
  42     ngx_http_perl_main_conf_t *pmcf);
  43 static ngx_int_t ngx_http_perl_run_requires(pTHX_ ngx_array_t *requires,
  44     ngx_log_t *log);
  45 static ngx_int_t ngx_http_perl_call_handler(pTHX_ ngx_http_request_t *r,
  46     HV *nginx, SV *sub, SV **args, ngx_str_t *handler, ngx_str_t *rv);
  47 static void ngx_http_perl_eval_anon_sub(pTHX_ ngx_str_t *handler, SV **sv);
  48
  49 static ngx_int_t ngx_http_perl_preconfiguration(ngx_conf_t *cf);
  50 static void *ngx_http_perl_create_main_conf(ngx_conf_t *cf);
  51 static char *ngx_http_perl_init_main_conf(ngx_conf_t *cf, void *conf);
  52 static void *ngx_http_perl_create_loc_conf(ngx_conf_t *cf);
  53 static char *ngx_http_perl_merge_loc_conf(ngx_conf_t *cf, void *parent,
  54     void *child);
  55 static char *ngx_http_perl(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
  56 static char *ngx_http_perl_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
  57
  58 #if (NGX_HAVE_PERL_MULTIPLICITY)
  59 static void ngx_http_perl_cleanup_perl(void *data);
  60 #endif
  61
  62 static ngx_int_t ngx_http_perl_init_worker(ngx_cycle_t *cycle);
  63 static void ngx_http_perl_exit(ngx_cycle_t *cycle);
  64
  65
  66 static ngx_command_t  ngx_http_perl_commands[] = {
  67
  68     { ngx_string("perl_modules"),
  69       NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
  70       ngx_conf_set_str_array_slot,
  71       NGX_HTTP_MAIN_CONF_OFFSET,
  72       offsetof(ngx_http_perl_main_conf_t, modules),
  73       NULL },
  74
  75     { ngx_string("perl_require"),
  76       NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
  77       ngx_conf_set_str_array_slot,
  78       NGX_HTTP_MAIN_CONF_OFFSET,
  79       offsetof(ngx_http_perl_main_conf_t, requires),
  80       NULL },
  81
  82     { ngx_string("perl"),
  83       NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_CONF_TAKE1,
  84       ngx_http_perl,
  85       NGX_HTTP_LOC_CONF_OFFSET,
  86       0,
  87       NULL },
  88
  89     { ngx_string("perl_set"),
  90       NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE2,
  91       ngx_http_perl_set,
  92       NGX_HTTP_LOC_CONF_OFFSET,
  93       0,
  94       NULL },
  95
  96       ngx_null_command
  97 };
  98
  99
 100 static ngx_http_module_t  ngx_http_perl_module_ctx = {
 101     ngx_http_perl_preconfiguration,        /* preconfiguration */
 102     NULL,                                  /* postconfiguration */
 103
 104     ngx_http_perl_create_main_conf,        /* create main configuration */
 105     ngx_http_perl_init_main_conf,          /* init main configuration */
 106
 107     NULL,                                  /* create server configuration */
 108     NULL,                                  /* merge server configuration */
 109
 110     ngx_http_perl_create_loc_conf,         /* create location configuration */
 111     ngx_http_perl_merge_loc_conf           /* merge location configuration */
 112 };
 113
 114
 115 ngx_module_t  ngx_http_perl_module = {
 116     NGX_MODULE_V1,
 117     &ngx_http_perl_module_ctx,             /* module context */
 118     ngx_http_perl_commands,                /* module directives */
 119     NGX_HTTP_MODULE,                       /* module type */
 120     NULL,                                  /* init master */
 121     NULL,                                  /* init module */
 122     ngx_http_perl_init_worker,             /* init process */
 123     NULL,                                  /* init thread */
 124     NULL,                                  /* exit thread */
 125     NULL,                                  /* exit process */
 126     ngx_http_perl_exit,                    /* exit master */
 127     NGX_MODULE_V1_PADDING
 128 };
 129
 130
 131 #if (NGX_HTTP_SSI)
 132
 133 #define NGX_HTTP_PERL_SSI_SUB  0
 134 #define NGX_HTTP_PERL_SSI_ARG  1
 135
 136
 137 static ngx_http_ssi_param_t  ngx_http_perl_ssi_params[] = {
 138     { ngx_string("sub"), NGX_HTTP_PERL_SSI_SUB, 1, 0 },
 139     { ngx_string("arg"), NGX_HTTP_PERL_SSI_ARG, 0, 1 },
 140     { ngx_null_string, 0, 0, 0 }
 141 };
 142
 143 static ngx_http_ssi_command_t  ngx_http_perl_ssi_command = {
 144     ngx_string("perl"), ngx_http_perl_ssi, ngx_http_perl_ssi_params, 0, 0, 1
 145 };
 146
 147 #endif
 148
 149
 150 static ngx_str_t         ngx_null_name = ngx_null_string;
 151 static HV               *nginx_stash;
 152
 153 #if (NGX_HAVE_PERL_MULTIPLICITY)
 154 static ngx_uint_t        ngx_perl_term;
 155 #else
 156 static PerlInterpreter  *perl;
 157 #endif
 158
 159
 160 static void
 161 ngx_http_perl_xs_init(pTHX)
 162 {
 163     newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, __FILE__);
 164
 165     nginx_stash = gv_stashpv("nginx", TRUE);
 166 }
 167
 168
 169 static ngx_int_t
 170 ngx_http_perl_handler(ngx_http_request_t *r)
 171 {
 172     r->main->count++;
 173
 174     ngx_http_perl_handle_request(r);
 175
 176     return NGX_DONE;
 177 }
 178
 179
 180 void
 181 ngx_http_perl_handle_request(ngx_http_request_t *r)
 182 {
 183     SV                         *sub;
 184     ngx_int_t                   rc;
 185     ngx_str_t                   uri, args, *handler;
 186     ngx_http_perl_ctx_t        *ctx;
 187     ngx_http_perl_loc_conf_t   *plcf;
 188     ngx_http_perl_main_conf_t  *pmcf;
 189
 190     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "perl handler");
 191
 192     ctx = ngx_http_get_module_ctx(r, ngx_http_perl_module);
 193
 194     if (ctx == NULL) {
 195         ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_perl_ctx_t));
 196         if (ctx == NULL) {
 197             ngx_http_finalize_request(r, NGX_ERROR);
 198             return;
 199         }
 200
 201         ngx_http_set_ctx(r, ctx, ngx_http_perl_module);
 202     }
 203
 204     pmcf = ngx_http_get_module_main_conf(r, ngx_http_perl_module);
 205
 206     {
 207
 208     dTHXa(pmcf->perl);
 209     PERL_SET_CONTEXT(pmcf->perl);
 210
 211     if (ctx->next == NULL) {
 212         plcf = ngx_http_get_module_loc_conf(r, ngx_http_perl_module);
 213         sub = plcf->sub;
 214         handler = &plcf->handler;
 215
 216     } else {
 217         sub = ctx->next;
 218         handler = &ngx_null_name;
 219         ctx->next = NULL;
 220     }
 221
 222     rc = ngx_http_perl_call_handler(aTHX_ r, pmcf->nginx, sub, NULL, handler,
 223                                     NULL);
 224
 225     }
 226
 227     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 228                    "perl handler done: %i", rc);
 229
 230     if (rc == NGX_DONE) {
 231         ngx_http_finalize_request(r, rc);
 232         return;
 233     }
 234
 235     if (rc > 600) {
 236         rc = NGX_OK;
 237     }
 238
 239     if (ctx->redirect_uri.len) {
 240         uri = ctx->redirect_uri;
 241         args = ctx->redirect_args;
 242
 243     } else {
 244         uri.len = 0;
 245     }
 246
 247     ctx->filename.data = NULL;
 248     ctx->redirect_uri.len = 0;
 249
 250     if (ctx->done || ctx->next) {
 251         ngx_http_finalize_request(r, NGX_DONE);
 252         return;
 253     }
 254
 255     if (uri.len) {
 256         ngx_http_internal_redirect(r, &uri, &args);
 257         ngx_http_finalize_request(r, NGX_DONE);
 258         return;
 259     }
 260
 261     if (rc == NGX_OK || rc == NGX_HTTP_OK) {
 262         ngx_http_send_special(r, NGX_HTTP_LAST);
 263         ctx->done = 1;
 264     }
 265
 266     ngx_http_finalize_request(r, rc);
 267 }
 268
 269
 270 void
 271 ngx_http_perl_sleep_handler(ngx_http_request_t *r)
 272 {
 273     ngx_event_t  *wev;
 274
 275     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 276                    "perl sleep handler");
 277
 278     wev = r->connection->write;
 279
 280     if (wev->timedout) {
 281         wev->timedout = 0;
 282         ngx_http_perl_handle_request(r);
 283         return;
 284     }
 285
 286     if (ngx_handle_write_event(wev, 0) != NGX_OK) {
 287         ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
 288     }
 289 }
 290
 291
 292 static ngx_int_t
 293 ngx_http_perl_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
 294     uintptr_t data)
 295 {
 296     ngx_http_perl_variable_t *pv = (ngx_http_perl_variable_t *) data;
 297
 298     ngx_int_t                   rc;
 299     ngx_str_t                   value;
 300     ngx_http_perl_ctx_t        *ctx;
 301     ngx_http_perl_main_conf_t  *pmcf;
 302
 303     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 304                    "perl variable handler");
 305
 306     ctx = ngx_http_get_module_ctx(r, ngx_http_perl_module);
 307
 308     if (ctx == NULL) {
 309         ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_perl_ctx_t));
 310         if (ctx == NULL) {
 311             return NGX_ERROR;
 312         }
 313
 314         ngx_http_set_ctx(r, ctx, ngx_http_perl_module);
 315     }
 316
 317     pmcf = ngx_http_get_module_main_conf(r, ngx_http_perl_module);
 318
 319     value.data = NULL;
 320
 321     {
 322
 323     dTHXa(pmcf->perl);
 324     PERL_SET_CONTEXT(pmcf->perl);
 325
 326     rc = ngx_http_perl_call_handler(aTHX_ r, pmcf->nginx, pv->sub, NULL,
 327                                     &pv->handler, &value);
 328
 329     }
 330
 331     if (value.data) {
 332         v->len = value.len;
 333         v->valid = 1;
 334         v->no_cacheable = 0;
 335         v->not_found = 0;
 336         v->data = value.data;
 337
 338     } else {
 339         v->not_found = 1;
 340     }
 341
 342     ctx->filename.data = NULL;
 343     ctx->redirect_uri.len = 0;
 344
 345     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 346                    "perl variable done");
 347
 348     return rc;
 349 }
 350
 351
 352 #if (NGX_HTTP_SSI)
 353
 354 static ngx_int_t
 355 ngx_http_perl_ssi(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ssi_ctx,
 356     ngx_str_t **params)
 357 {
 358     SV                         *sv, **asv;
 359     ngx_int_t                   rc;
 360     ngx_str_t                  *handler, **args;
 361     ngx_uint_t                  i;
 362     ngx_http_perl_ctx_t        *ctx;
 363     ngx_http_perl_main_conf_t  *pmcf;
 364
 365     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 366                    "perl ssi handler");
 367
 368     ctx = ngx_http_get_module_ctx(r, ngx_http_perl_module);
 369
 370     if (ctx == NULL) {
 371         ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_perl_ctx_t));
 372         if (ctx == NULL) {
 373             return NGX_ERROR;
 374         }
 375
 376         ngx_http_set_ctx(r, ctx, ngx_http_perl_module);
 377     }
 378
 379     pmcf = ngx_http_get_module_main_conf(r, ngx_http_perl_module);
 380
 381     ctx->ssi = ssi_ctx;
 382
 383     handler = params[NGX_HTTP_PERL_SSI_SUB];
 384     handler->data[handler->len] = '\0';
 385
 386     {
 387
 388     dTHXa(pmcf->perl);
 389     PERL_SET_CONTEXT(pmcf->perl);
 390
 391 #if 0
 392
 393     /* the code is disabled to force the precompiled perl code using only */
 394
 395     ngx_http_perl_eval_anon_sub(aTHX_ handler, &sv);
 396
 397     if (sv == &PL_sv_undef) {
 398         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
 399                       "eval_pv(\"%V\") failed", handler);
 400         return NGX_ERROR;
 401     }
 402
 403     if (sv == NULL) {
 404         sv = newSVpvn((char *) handler->data, handler->len);
 405     }
 406
 407 #endif
 408
 409     sv = newSVpvn((char *) handler->data, handler->len);
 410
 411     args = &params[NGX_HTTP_PERL_SSI_ARG];
 412
 413     if (args) {
 414
 415         for (i = 0; args[i]; i++) { /* void */ }
 416
 417         asv = ngx_pcalloc(r->pool, (i + 1) * sizeof(SV *));
 418
 419         if (asv == NULL) {
 420             SvREFCNT_dec(sv);
 421             return NGX_ERROR;
 422         }
 423
 424         asv[0] = (SV *) i;
 425
 426         for (i = 0; args[i]; i++) {
 427             asv[i + 1] = newSVpvn((char *) args[i]->data, args[i]->len);
 428         }
 429
 430     } else {
 431         asv = NULL;
 432     }
 433
 434     rc = ngx_http_perl_call_handler(aTHX_ r, pmcf->nginx, sv, asv, handler,
 435                                     NULL);
 436
 437     SvREFCNT_dec(sv);
 438
 439     }
 440
 441     ctx->filename.data = NULL;
 442     ctx->redirect_uri.len = 0;
 443     ctx->ssi = NULL;
 444
 445     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "perl ssi done");
 446
 447     return rc;
 448 }
 449
 450 #endif
 451
 452
 453 static char *
 454 ngx_http_perl_init_interpreter(ngx_conf_t *cf, ngx_http_perl_main_conf_t *pmcf)
 455 {
 456     ngx_str_t           *m;
 457     ngx_uint_t           i;
 458 #if (NGX_HAVE_PERL_MULTIPLICITY)
 459     ngx_pool_cleanup_t  *cln;
 460
 461     cln = ngx_pool_cleanup_add(cf->pool, 0);
 462     if (cln == NULL) {
 463         return NGX_CONF_ERROR;
 464     }
 465
 466 #endif
 467
 468 #ifdef NGX_PERL_MODULES
 469     if (pmcf->modules == NGX_CONF_UNSET_PTR) {
 470
 471         pmcf->modules = ngx_array_create(cf->pool, 1, sizeof(ngx_str_t));
 472         if (pmcf->modules == NULL) {
 473             return NGX_CONF_ERROR;
 474         }
 475
 476         m = ngx_array_push(pmcf->modules);
 477         if (m == NULL) {
 478             return NGX_CONF_ERROR;
 479         }
 480
 481         ngx_str_set(m, NGX_PERL_MODULES);
 482     }
 483 #endif
 484
 485     if (pmcf->modules != NGX_CONF_UNSET_PTR) {
 486         m = pmcf->modules->elts;
 487         for (i = 0; i < pmcf->modules->nelts; i++) {
 488             if (ngx_conf_full_name(cf->cycle, &m[i], 0) != NGX_OK) {
 489                 return NGX_CONF_ERROR;
 490             }
 491         }
 492     }
 493
 494 #if !(NGX_HAVE_PERL_MULTIPLICITY)
 495
 496     if (perl) {
 497
 498         if (ngx_set_environment(cf->cycle, NULL) == NULL) {
 499             return NGX_CONF_ERROR;
 500         }
 501
 502         if (ngx_http_perl_run_requires(aTHX_ pmcf->requires, cf->log)
 503             != NGX_OK)
 504         {
 505             return NGX_CONF_ERROR;
 506         }
 507
 508         pmcf->perl = perl;
 509         pmcf->nginx = nginx_stash;
 510
 511         return NGX_CONF_OK;
 512     }
 513
 514 #endif
 515
 516     if (nginx_stash == NULL) {
 517         PERL_SYS_INIT(&ngx_argc, &ngx_argv);
 518     }
 519
 520     pmcf->perl = ngx_http_perl_create_interpreter(cf, pmcf);
 521
 522     if (pmcf->perl == NULL) {
 523         return NGX_CONF_ERROR;
 524     }
 525
 526     pmcf->nginx = nginx_stash;
 527
 528 #if (NGX_HAVE_PERL_MULTIPLICITY)
 529
 530     cln->handler = ngx_http_perl_cleanup_perl;
 531     cln->data = pmcf->perl;
 532
 533 #else
 534
 535     perl = pmcf->perl;
 536
 537 #endif
 538
 539     return NGX_CONF_OK;
 540 }
 541
 542
 543 static PerlInterpreter *
 544 ngx_http_perl_create_interpreter(ngx_conf_t *cf,
 545     ngx_http_perl_main_conf_t *pmcf)
 546 {
 547     int                n;
 548     STRLEN             len;
 549     SV                *sv;
 550     char              *ver, **embedding;
 551     ngx_str_t         *m;
 552     ngx_uint_t         i;
 553     PerlInterpreter   *perl;
 554
 555     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, cf->log, 0, "create perl interpreter");
 556
 557     if (ngx_set_environment(cf->cycle, NULL) == NULL) {
 558         return NULL;
 559     }
 560
 561     perl = perl_alloc();
 562     if (perl == NULL) {
 563         ngx_log_error(NGX_LOG_ALERT, cf->log, 0, "perl_alloc() failed");
 564         return NULL;
 565     }
 566
 567     {
 568
 569     dTHXa(perl);
 570     PERL_SET_CONTEXT(perl);
 571
 572     perl_construct(perl);
 573
 574 #ifdef PERL_EXIT_DESTRUCT_END
 575     PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
 576 #endif
 577
 578     n = (pmcf->modules != NGX_CONF_UNSET_PTR) ? pmcf->modules->nelts * 2 : 0;
 579
 580     embedding = ngx_palloc(cf->pool, (4 + n) * sizeof(char *));
 581     if (embedding == NULL) {
 582         goto fail;
 583     }
 584
 585     embedding[0] = "";
 586
 587     if (n++) {
 588         m = pmcf->modules->elts;
 589         for (i = 0; i < pmcf->modules->nelts; i++) {
 590             embedding[2 * i + 1] = "-I";
 591             embedding[2 * i + 2] = (char *) m[i].data;
 592         }
 593     }
 594
 595     embedding[n++] = "-Mnginx";
 596     embedding[n++] = "-e";
 597     embedding[n++] = "0";
 598
 599     n = perl_parse(perl, ngx_http_perl_xs_init, n, embedding, NULL);
 600
 601     if (n != 0) {
 602         ngx_log_error(NGX_LOG_ALERT, cf->log, 0, "perl_parse() failed: %d", n);
 603         goto fail;
 604     }
 605
 606     sv = get_sv("nginx::VERSION", FALSE);
 607     ver = SvPV(sv, len);
 608
 609     if (ngx_strcmp(ver, NGINX_VERSION) != 0) {
 610         ngx_log_error(NGX_LOG_ALERT, cf->log, 0,
 611                       "version " NGINX_VERSION " of nginx.pm is required, "
 612                       "but %s was found", ver);
 613         goto fail;
 614     }
 615
 616     if (ngx_http_perl_run_requires(aTHX_ pmcf->requires, cf->log) != NGX_OK) {
 617         goto fail;
 618     }
 619
 620     }
 621
 622     return perl;
 623
 624 fail:
 625
 626     (void) perl_destruct(perl);
 627
 628     perl_free(perl);
 629
 630     return NULL;
 631 }
 632
 633
 634 static ngx_int_t
 635 ngx_http_perl_run_requires(pTHX_ ngx_array_t *requires, ngx_log_t *log)
 636 {
 637     u_char      *err;
 638     STRLEN       len;
 639     ngx_str_t   *script;
 640     ngx_uint_t   i;
 641
 642     if (requires == NGX_CONF_UNSET_PTR) {
 643         return NGX_OK;
 644     }
 645
 646     script = requires->elts;
 647     for (i = 0; i < requires->nelts; i++) {
 648
 649         require_pv((char *) script[i].data);
 650
 651         if (SvTRUE(ERRSV)) {
 652
 653             err = (u_char *) SvPV(ERRSV, len);
 654             while (--len && (err[len] == CR || err[len] == LF)) { /* void */ }
 655
 656             ngx_log_error(NGX_LOG_EMERG, log, 0,
 657                           "require_pv(\"%s\") failed: \"%*s\"",
 658                           script[i].data, len + 1, err);
 659
 660             return NGX_ERROR;
 661         }
 662     }
 663
 664     return NGX_OK;
 665 }
 666
 667
 668 static ngx_int_t
 669 ngx_http_perl_call_handler(pTHX_ ngx_http_request_t *r, HV *nginx, SV *sub,
 670     SV **args, ngx_str_t *handler, ngx_str_t *rv)
 671 {
 672     SV                *sv;
 673     int                n, status;
 674     char              *line;
 675     u_char            *err;
 676     STRLEN             len, n_a;
 677     ngx_uint_t         i;
 678     ngx_connection_t  *c;
 679
 680     dSP;
 681
 682     status = 0;
 683
 684     ENTER;
 685     SAVETMPS;
 686
 687     PUSHMARK(sp);
 688
 689     sv = sv_2mortal(sv_bless(newRV_noinc(newSViv(PTR2IV(r))), nginx));
 690     XPUSHs(sv);
 691
 692     if (args) {
 693         EXTEND(sp, (intptr_t) args[0]);
 694
 695         for (i = 1; i <= (ngx_uint_t) args[0]; i++) {
 696             PUSHs(sv_2mortal(args[i]));
 697         }
 698     }
 699
 700     PUTBACK;
 701
 702     c = r->connection;
 703
 704     n = call_sv(sub, G_EVAL);
 705
 706     SPAGAIN;
 707
 708     if (n) {
 709         if (rv == NULL) {
 710             status = POPi;
 711
 712             ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
 713                            "call_sv: %d", status);
 714
 715         } else {
 716             line = SvPVx(POPs, n_a);
 717             rv->len = n_a;
 718
 719             rv->data = ngx_pnalloc(r->pool, n_a);
 720             if (rv->data == NULL) {
 721                 return NGX_ERROR;
 722             }
 723
 724             ngx_memcpy(rv->data, line, n_a);
 725         }
 726     }
 727
 728     PUTBACK;
 729
 730     FREETMPS;
 731     LEAVE;
 732
 733     /* check $@ */
 734
 735     if (SvTRUE(ERRSV)) {
 736
 737         err = (u_char *) SvPV(ERRSV, len);
 738         while (--len && (err[len] == CR || err[len] == LF)) { /* void */ }
 739
 740         ngx_log_error(NGX_LOG_ERR, c->log, 0,
 741                       "call_sv(\"%V\") failed: \"%*s\"", handler, len + 1, err);
 742
 743         if (rv) {
 744             return NGX_ERROR;
 745         }
 746
 747         return NGX_HTTP_INTERNAL_SERVER_ERROR;
 748     }
 749
 750     if (n != 1) {
 751         ngx_log_error(NGX_LOG_ALERT, c->log, 0,
 752                       "call_sv(\"%V\") returned %d results", handler, n);
 753         status = NGX_OK;
 754     }
 755
 756     if (rv) {
 757         return NGX_OK;
 758     }
 759
 760     return (ngx_int_t) status;
 761 }
 762
 763
 764 static void
 765 ngx_http_perl_eval_anon_sub(pTHX_ ngx_str_t *handler, SV **sv)
 766 {
 767     u_char  *p;
 768
 769     for (p = handler->data; *p; p++) {
 770         if (*p != ' ' && *p != '\t' && *p != CR && *p != LF) {
 771             break;
 772         }
 773     }
 774
 775     if (ngx_strncmp(p, "sub ", 4) == 0
 776         || ngx_strncmp(p, "sub{", 4) == 0
 777         || ngx_strncmp(p, "use ", 4) == 0)
 778     {
 779         *sv = eval_pv((char *) p, FALSE);
 780
 781         /* eval_pv() does not set ERRSV on failure */
 782
 783         return;
 784     }
 785
 786     *sv = NULL;
 787 }
 788
 789
 790 static void *
 791 ngx_http_perl_create_main_conf(ngx_conf_t *cf)
 792 {
 793     ngx_http_perl_main_conf_t  *pmcf;
 794
 795     pmcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_perl_main_conf_t));
 796     if (pmcf == NULL) {
 797         return NULL;
 798     }
 799
 800     pmcf->modules = NGX_CONF_UNSET_PTR;
 801     pmcf->requires = NGX_CONF_UNSET_PTR;
 802
 803     return pmcf;
 804 }
 805
 806
 807 static char *
 808 ngx_http_perl_init_main_conf(ngx_conf_t *cf, void *conf)
 809 {
 810     ngx_http_perl_main_conf_t *pmcf = conf;
 811
 812     if (pmcf->perl == NULL) {
 813         if (ngx_http_perl_init_interpreter(cf, pmcf) != NGX_CONF_OK) {
 814             return NGX_CONF_ERROR;
 815         }
 816     }
 817
 818     return NGX_CONF_OK;
 819 }
 820
 821
 822 #if (NGX_HAVE_PERL_MULTIPLICITY)
 823
 824 static void
 825 ngx_http_perl_cleanup_perl(void *data)
 826 {
 827     PerlInterpreter  *perl = data;
 828
 829     PERL_SET_CONTEXT(perl);
 830
 831     (void) perl_destruct(perl);
 832
 833     perl_free(perl);
 834
 835     if (ngx_perl_term) {
 836         ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0, "perl term");
 837
 838         PERL_SYS_TERM();
 839     }
 840 }
 841
 842 #endif
 843
 844
 845 static ngx_int_t
 846 ngx_http_perl_preconfiguration(ngx_conf_t *cf)
 847 {
 848 #if (NGX_HTTP_SSI)
 849     ngx_int_t                  rc;
 850     ngx_http_ssi_main_conf_t  *smcf;
 851
 852     smcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_ssi_filter_module);
 853
 854     rc = ngx_hash_add_key(&smcf->commands, &ngx_http_perl_ssi_command.name,
 855                           &ngx_http_perl_ssi_command, NGX_HASH_READONLY_KEY);
 856
 857     if (rc != NGX_OK) {
 858         if (rc == NGX_BUSY) {
 859             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 860                                "conflicting SSI command \"%V\"",
 861                                &ngx_http_perl_ssi_command.name);
 862         }
 863
 864         return NGX_ERROR;
 865     }
 866 #endif
 867
 868     return NGX_OK;
 869 }
 870
 871
 872 static void *
 873 ngx_http_perl_create_loc_conf(ngx_conf_t *cf)
 874 {
 875     ngx_http_perl_loc_conf_t *plcf;
 876
 877     plcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_perl_loc_conf_t));
 878     if (plcf == NULL) {
 879         return NULL;
 880     }
 881
 882     /*
 883      * set by ngx_pcalloc():
 884      *
 885      *     plcf->handler = { 0, NULL };
 886      */
 887
 888     return plcf;
 889 }
 890
 891
 892 static char *
 893 ngx_http_perl_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
 894 {
 895     ngx_http_perl_loc_conf_t *prev = parent;
 896     ngx_http_perl_loc_conf_t *conf = child;
 897
 898     if (conf->sub == NULL) {
 899         conf->sub = prev->sub;
 900         conf->handler = prev->handler;
 901     }
 902
 903     return NGX_CONF_OK;
 904 }
 905
 906
 907 static char *
 908 ngx_http_perl(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
 909 {
 910     ngx_http_perl_loc_conf_t *plcf = conf;
 911
 912     ngx_str_t                  *value;
 913     ngx_http_core_loc_conf_t   *clcf;
 914     ngx_http_perl_main_conf_t  *pmcf;
 915
 916     value = cf->args->elts;
 917
 918     if (plcf->handler.data) {
 919         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 920                            "duplicate perl handler \"%V\"", &value[1]);
 921         return NGX_CONF_ERROR;
 922     }
 923
 924     pmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_perl_module);
 925
 926     if (pmcf->perl == NULL) {
 927         if (ngx_http_perl_init_interpreter(cf, pmcf) != NGX_CONF_OK) {
 928             return NGX_CONF_ERROR;
 929         }
 930     }
 931
 932     plcf->handler = value[1];
 933
 934     {
 935
 936     dTHXa(pmcf->perl);
 937     PERL_SET_CONTEXT(pmcf->perl);
 938
 939     ngx_http_perl_eval_anon_sub(aTHX_ &value[1], &plcf->sub);
 940
 941     if (plcf->sub == &PL_sv_undef) {
 942         ngx_conf_log_error(NGX_LOG_ERR, cf, 0,
 943                            "eval_pv(\"%V\") failed", &value[1]);
 944         return NGX_CONF_ERROR;
 945     }
 946
 947     if (plcf->sub == NULL) {
 948         plcf->sub = newSVpvn((char *) value[1].data, value[1].len);
 949     }
 950
 951     }
 952
 953     clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
 954     clcf->handler = ngx_http_perl_handler;
 955
 956     return NGX_CONF_OK;
 957 }
 958
 959
 960 static char *
 961 ngx_http_perl_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
 962 {
 963     ngx_int_t                   index;
 964     ngx_str_t                  *value;
 965     ngx_http_variable_t        *v;
 966     ngx_http_perl_variable_t   *pv;
 967     ngx_http_perl_main_conf_t  *pmcf;
 968
 969     value = cf->args->elts;
 970
 971     if (value[1].data[0] != '$') {
 972         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 973                            "invalid variable name \"%V\"", &value[1]);
 974         return NGX_CONF_ERROR;
 975     }
 976
 977     value[1].len--;
 978     value[1].data++;
 979
 980     v = ngx_http_add_variable(cf, &value[1], NGX_HTTP_VAR_CHANGEABLE);
 981     if (v == NULL) {
 982         return NGX_CONF_ERROR;
 983     }
 984
 985     pv = ngx_palloc(cf->pool, sizeof(ngx_http_perl_variable_t));
 986     if (pv == NULL) {
 987         return NGX_CONF_ERROR;
 988     }
 989
 990     index = ngx_http_get_variable_index(cf, &value[1]);
 991     if (index == NGX_ERROR) {
 992         return NGX_CONF_ERROR;
 993     }
 994
 995     pmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_perl_module);
 996
 997     if (pmcf->perl == NULL) {
 998         if (ngx_http_perl_init_interpreter(cf, pmcf) != NGX_CONF_OK) {
 999             return NGX_CONF_ERROR;
1000         }
1001     }
1002
1003     pv->handler = value[2];
1004
1005     {
1006
1007     dTHXa(pmcf->perl);
1008     PERL_SET_CONTEXT(pmcf->perl);
1009
1010     ngx_http_perl_eval_anon_sub(aTHX_ &value[2], &pv->sub);
1011
1012     if (pv->sub == &PL_sv_undef) {
1013         ngx_conf_log_error(NGX_LOG_ERR, cf, 0,
1014                            "eval_pv(\"%V\") failed", &value[2]);
1015         return NGX_CONF_ERROR;
1016     }
1017
1018     if (pv->sub == NULL) {
1019         pv->sub = newSVpvn((char *) value[2].data, value[2].len);
1020     }
1021
1022     }
1023
1024     v->get_handler = ngx_http_perl_variable;
1025     v->data = (uintptr_t) pv;
1026
1027     return NGX_CONF_OK;
1028 }
1029
1030
1031 static ngx_int_t
1032 ngx_http_perl_init_worker(ngx_cycle_t *cycle)
1033 {
1034     ngx_http_perl_main_conf_t  *pmcf;
1035
1036     pmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_perl_module);
1037
1038     if (pmcf) {
1039         dTHXa(pmcf->perl);
1040         PERL_SET_CONTEXT(pmcf->perl);
1041
1042         /* set worker's $$ */
1043
1044         sv_setiv(GvSV(gv_fetchpv("$", TRUE, SVt_PV)), (I32) ngx_pid);
1045     }
1046
1047     return NGX_OK;
1048 }
1049
1050
1051 static void
1052 ngx_http_perl_exit(ngx_cycle_t *cycle)
1053 {
1054 #if (NGX_HAVE_PERL_MULTIPLICITY)
1055
1056     /*
1057      * the master exit hook is run before global pool cleanup,
1058      * therefore just set flag here
1059      */
1060
1061     ngx_perl_term = 1;
1062
1063 #else
1064
1065     if (nginx_stash) {
1066         ngx_log_debug0(NGX_LOG_DEBUG_HTTP, cycle->log, 0, "perl term");
1067
1068         (void) perl_destruct(perl);
1069
1070         perl_free(perl);
1071
1072         PERL_SYS_TERM();
1073     }
1074
1075 #endif
1076 }