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
14typedef 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
22typedef struct {
23    SV                *sub;
24    ngx_str_t          handler;
25} ngx_http_perl_loc_conf_t;
26
27
28typedef struct {
29    SV                *sub;
30    ngx_str_t          handler;
31} ngx_http_perl_variable_t;
32
33
34#if (NGX_HTTP_SSI)
35static 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
39static char *ngx_http_perl_init_interpreter(ngx_conf_t *cf,
40    ngx_http_perl_main_conf_t *pmcf);
41static PerlInterpreter *ngx_http_perl_create_interpreter(ngx_conf_t *cf,
42    ngx_http_perl_main_conf_t *pmcf);
43static ngx_int_t ngx_http_perl_run_requires(pTHX_ ngx_array_t *requires,
44    ngx_log_t *log);
45static 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);
47static void ngx_http_perl_eval_anon_sub(pTHX_ ngx_str_t *handler, SV **sv);
48
49static ngx_int_t ngx_http_perl_preconfiguration(ngx_conf_t *cf);
50static void *ngx_http_perl_create_main_conf(ngx_conf_t *cf);
51static char *ngx_http_perl_init_main_conf(ngx_conf_t *cf, void *conf);
52static void *ngx_http_perl_create_loc_conf(ngx_conf_t *cf);
53static char *ngx_http_perl_merge_loc_conf(ngx_conf_t *cf, void *parent,
54    void *child);
55static char *ngx_http_perl(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
56static char *ngx_http_perl_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
57
58#if (NGX_HAVE_PERL_MULTIPLICITY)
59static void ngx_http_perl_cleanup_perl(void *data);
60#endif
61
62static ngx_int_t ngx_http_perl_init_worker(ngx_cycle_t *cycle);
63static void ngx_http_perl_exit(ngx_cycle_t *cycle);
64
65
66static 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
100static 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
115ngx_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
137static 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
143static 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
150static ngx_str_t         ngx_null_name = ngx_null_string;
151static HV               *nginx_stash;
152
153#if (NGX_HAVE_PERL_MULTIPLICITY)
154static ngx_uint_t        ngx_perl_term;
155#else
156static PerlInterpreter  *perl;
157#endif
158
159
160static void
161ngx_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
169static ngx_int_t
170ngx_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
180void
181ngx_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    PERL_SET_INTERP(pmcf->perl);
211
212    if (ctx->next == NULL) {
213        plcf = ngx_http_get_module_loc_conf(r, ngx_http_perl_module);
214        sub = plcf->sub;
215        handler = &plcf->handler;
216
217    } else {
218        sub = ctx->next;
219        handler = &ngx_null_name;
220        ctx->next = NULL;
221    }
222
223    rc = ngx_http_perl_call_handler(aTHX_ r, pmcf->nginx, sub, NULL, handler,
224                                    NULL);
225
226    }
227
228    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
229                   "perl handler done: %i", rc);
230
231    if (rc == NGX_DONE) {
232        ngx_http_finalize_request(r, rc);
233        return;
234    }
235
236    if (rc > 600) {
237        rc = NGX_OK;
238    }
239
240    if (ctx->redirect_uri.len) {
241        uri = ctx->redirect_uri;
242        args = ctx->redirect_args;
243
244    } else {
245        uri.len = 0;
246    }
247
248    ctx->filename.data = NULL;
249    ctx->redirect_uri.len = 0;
250
251    if (ctx->done || ctx->next) {
252        ngx_http_finalize_request(r, NGX_DONE);
253        return;
254    }
255
256    if (uri.len) {
257        ngx_http_internal_redirect(r, &uri, &args);
258        ngx_http_finalize_request(r, NGX_DONE);
259        return;
260    }
261
262    if (rc == NGX_OK || rc == NGX_HTTP_OK) {
263        ngx_http_send_special(r, NGX_HTTP_LAST);
264        ctx->done = 1;
265    }
266
267    ngx_http_finalize_request(r, rc);
268}
269
270
271void
272ngx_http_perl_sleep_handler(ngx_http_request_t *r)
273{
274    ngx_event_t  *wev;
275
276    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
277                   "perl sleep handler");
278
279    wev = r->connection->write;
280
281    if (wev->delayed) {
282
283        if (ngx_handle_write_event(wev, 0) != NGX_OK) {
284            ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
285        }
286
287        return;
288    }
289
290    ngx_http_perl_handle_request(r);
291}
292
293
294static ngx_int_t
295ngx_http_perl_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
296    uintptr_t data)
297{
298    ngx_http_perl_variable_t *pv = (ngx_http_perl_variable_t *) data;
299
300    ngx_int_t                   rc;
301    ngx_str_t                   value;
302    ngx_http_perl_ctx_t        *ctx;
303    ngx_http_perl_main_conf_t  *pmcf;
304
305    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
306                   "perl variable handler");
307
308    ctx = ngx_http_get_module_ctx(r, ngx_http_perl_module);
309
310    if (ctx == NULL) {
311        ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_perl_ctx_t));
312        if (ctx == NULL) {
313            return NGX_ERROR;
314        }
315
316        ngx_http_set_ctx(r, ctx, ngx_http_perl_module);
317    }
318
319    pmcf = ngx_http_get_module_main_conf(r, ngx_http_perl_module);
320
321    value.data = NULL;
322
323    {
324
325    dTHXa(pmcf->perl);
326    PERL_SET_CONTEXT(pmcf->perl);
327    PERL_SET_INTERP(pmcf->perl);
328
329    rc = ngx_http_perl_call_handler(aTHX_ r, pmcf->nginx, pv->sub, NULL,
330                                    &pv->handler, &value);
331
332    }
333
334    if (value.data) {
335        v->len = value.len;
336        v->valid = 1;
337        v->no_cacheable = 0;
338        v->not_found = 0;
339        v->data = value.data;
340
341    } else {
342        v->not_found = 1;
343    }
344
345    ctx->filename.data = NULL;
346    ctx->redirect_uri.len = 0;
347
348    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
349                   "perl variable done");
350
351    return rc;
352}
353
354
355#if (NGX_HTTP_SSI)
356
357static ngx_int_t
358ngx_http_perl_ssi(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ssi_ctx,
359    ngx_str_t **params)
360{
361    SV                         *sv, **asv;
362    ngx_int_t                   rc;
363    ngx_str_t                  *handler, **args;
364    ngx_uint_t                  i;
365    ngx_http_perl_ctx_t        *ctx;
366    ngx_http_perl_main_conf_t  *pmcf;
367
368    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
369                   "perl ssi handler");
370
371    ctx = ngx_http_get_module_ctx(r, ngx_http_perl_module);
372
373    if (ctx == NULL) {
374        ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_perl_ctx_t));
375        if (ctx == NULL) {
376            return NGX_ERROR;
377        }
378
379        ngx_http_set_ctx(r, ctx, ngx_http_perl_module);
380    }
381
382    pmcf = ngx_http_get_module_main_conf(r, ngx_http_perl_module);
383
384    ctx->ssi = ssi_ctx;
385
386    handler = params[NGX_HTTP_PERL_SSI_SUB];
387    handler->data[handler->len] = '\0';
388
389    {
390
391    dTHXa(pmcf->perl);
392    PERL_SET_CONTEXT(pmcf->perl);
393    PERL_SET_INTERP(pmcf->perl);
394
395#if 0
396
397    /* the code is disabled to force the precompiled perl code using only */
398
399    ngx_http_perl_eval_anon_sub(aTHX_ handler, &sv);
400
401    if (sv == &PL_sv_undef) {
402        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
403                      "eval_pv(\"%V\") failed", handler);
404        return NGX_ERROR;
405    }
406
407    if (sv == NULL) {
408        sv = newSVpvn((char *) handler->data, handler->len);
409    }
410
411#endif
412
413    sv = newSVpvn((char *) handler->data, handler->len);
414
415    args = &params[NGX_HTTP_PERL_SSI_ARG];
416
417    if (args[0]) {
418
419        for (i = 0; args[i]; i++) { /* void */ }
420
421        asv = ngx_pcalloc(r->pool, (i + 1) * sizeof(SV *));
422
423        if (asv == NULL) {
424            SvREFCNT_dec(sv);
425            return NGX_ERROR;
426        }
427
428        asv[0] = (SV *) (uintptr_t) i;
429
430        for (i = 0; args[i]; i++) {
431            asv[i + 1] = newSVpvn((char *) args[i]->data, args[i]->len);
432        }
433
434    } else {
435        asv = NULL;
436    }
437
438    rc = ngx_http_perl_call_handler(aTHX_ r, pmcf->nginx, sv, asv, handler,
439                                    NULL);
440
441    SvREFCNT_dec(sv);
442
443    }
444
445    ctx->filename.data = NULL;
446    ctx->redirect_uri.len = 0;
447    ctx->ssi = NULL;
448
449    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "perl ssi done");
450
451    return rc;
452}
453
454#endif
455
456
457static char *
458ngx_http_perl_init_interpreter(ngx_conf_t *cf, ngx_http_perl_main_conf_t *pmcf)
459{
460    ngx_str_t           *m;
461    ngx_uint_t           i;
462#if (NGX_HAVE_PERL_MULTIPLICITY)
463    ngx_pool_cleanup_t  *cln;
464
465    cln = ngx_pool_cleanup_add(cf->pool, 0);
466    if (cln == NULL) {
467        return NGX_CONF_ERROR;
468    }
469
470#endif
471
472#ifdef NGX_PERL_MODULES
473    if (pmcf->modules == NGX_CONF_UNSET_PTR) {
474
475        pmcf->modules = ngx_array_create(cf->pool, 1, sizeof(ngx_str_t));
476        if (pmcf->modules == NULL) {
477            return NGX_CONF_ERROR;
478        }
479
480        m = ngx_array_push(pmcf->modules);
481        if (m == NULL) {
482            return NGX_CONF_ERROR;
483        }
484
485        ngx_str_set(m, NGX_PERL_MODULES);
486    }
487#endif
488
489    if (pmcf->modules != NGX_CONF_UNSET_PTR) {
490        m = pmcf->modules->elts;
491        for (i = 0; i < pmcf->modules->nelts; i++) {
492            if (ngx_conf_full_name(cf->cycle, &m[i], 0) != NGX_OK) {
493                return NGX_CONF_ERROR;
494            }
495        }
496    }
497
498#if !(NGX_HAVE_PERL_MULTIPLICITY)
499
500    if (perl) {
501
502        if (ngx_set_environment(cf->cycle, NULL) == NULL) {
503            return NGX_CONF_ERROR;
504        }
505
506        if (ngx_http_perl_run_requires(aTHX_ pmcf->requires, cf->log)
507            != NGX_OK)
508        {
509            return NGX_CONF_ERROR;
510        }
511
512        pmcf->perl = perl;
513        pmcf->nginx = nginx_stash;
514
515        return NGX_CONF_OK;
516    }
517
518#endif
519
520    if (nginx_stash == NULL) {
521        PERL_SYS_INIT(&ngx_argc, &ngx_argv);
522    }
523
524    pmcf->perl = ngx_http_perl_create_interpreter(cf, pmcf);
525
526    if (pmcf->perl == NULL) {
527        return NGX_CONF_ERROR;
528    }
529
530    pmcf->nginx = nginx_stash;
531
532#if (NGX_HAVE_PERL_MULTIPLICITY)
533
534    cln->handler = ngx_http_perl_cleanup_perl;
535    cln->data = pmcf->perl;
536
537#else
538
539    perl = pmcf->perl;
540
541#endif
542
543    return NGX_CONF_OK;
544}
545
546
547static PerlInterpreter *
548ngx_http_perl_create_interpreter(ngx_conf_t *cf,
549    ngx_http_perl_main_conf_t *pmcf)
550{
551    int                n;
552    STRLEN             len;
553    SV                *sv;
554    char              *ver, **embedding;
555    ngx_str_t         *m;
556    ngx_uint_t         i;
557    PerlInterpreter   *perl;
558
559    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, cf->log, 0, "create perl interpreter");
560
561    if (ngx_set_environment(cf->cycle, NULL) == NULL) {
562        return NULL;
563    }
564
565    perl = perl_alloc();
566    if (perl == NULL) {
567        ngx_log_error(NGX_LOG_ALERT, cf->log, 0, "perl_alloc() failed");
568        return NULL;
569    }
570
571    {
572
573    dTHXa(perl);
574    PERL_SET_CONTEXT(perl);
575    PERL_SET_INTERP(perl);
576
577    perl_construct(perl);
578
579#ifdef PERL_EXIT_DESTRUCT_END
580    PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
581#endif
582
583    n = (pmcf->modules != NGX_CONF_UNSET_PTR) ? pmcf->modules->nelts * 2 : 0;
584
585    embedding = ngx_palloc(cf->pool, (5 + n) * sizeof(char *));
586    if (embedding == NULL) {
587        goto fail;
588    }
589
590    embedding[0] = "";
591
592    if (n++) {
593        m = pmcf->modules->elts;
594        for (i = 0; i < pmcf->modules->nelts; i++) {
595            embedding[2 * i + 1] = "-I";
596            embedding[2 * i + 2] = (char *) m[i].data;
597        }
598    }
599
600    embedding[n++] = "-Mnginx";
601    embedding[n++] = "-e";
602    embedding[n++] = "0";
603    embedding[n] = NULL;
604
605    n = perl_parse(perl, ngx_http_perl_xs_init, n, embedding, NULL);
606
607    if (n != 0) {
608        ngx_log_error(NGX_LOG_ALERT, cf->log, 0, "perl_parse() failed: %d", n);
609        goto fail;
610    }
611
612    sv = get_sv("nginx::VERSION", FALSE);
613    ver = SvPV(sv, len);
614
615    if (ngx_strcmp(ver, NGINX_VERSION) != 0) {
616        ngx_log_error(NGX_LOG_ALERT, cf->log, 0,
617                      "version " NGINX_VERSION " of nginx.pm is required, "
618                      "but %s was found", ver);
619        goto fail;
620    }
621
622    if (ngx_http_perl_run_requires(aTHX_ pmcf->requires, cf->log) != NGX_OK) {
623        goto fail;
624    }
625
626    }
627
628    return perl;
629
630fail:
631
632    (void) perl_destruct(perl);
633
634    perl_free(perl);
635
636    return NULL;
637}
638
639
640static ngx_int_t
641ngx_http_perl_run_requires(pTHX_ ngx_array_t *requires, ngx_log_t *log)
642{
643    u_char      *err;
644    STRLEN       len;
645    ngx_str_t   *script;
646    ngx_uint_t   i;
647
648    if (requires == NGX_CONF_UNSET_PTR) {
649        return NGX_OK;
650    }
651
652    script = requires->elts;
653    for (i = 0; i < requires->nelts; i++) {
654
655        require_pv((char *) script[i].data);
656
657        if (SvTRUE(ERRSV)) {
658
659            err = (u_char *) SvPV(ERRSV, len);
660            while (--len && (err[len] == CR || err[len] == LF)) { /* void */ }
661
662            ngx_log_error(NGX_LOG_EMERG, log, 0,
663                          "require_pv(\"%s\") failed: \"%*s\"",
664                          script[i].data, len + 1, err);
665
666            return NGX_ERROR;
667        }
668    }
669
670    return NGX_OK;
671}
672
673
674static ngx_int_t
675ngx_http_perl_call_handler(pTHX_ ngx_http_request_t *r, HV *nginx, SV *sub,
676    SV **args, ngx_str_t *handler, ngx_str_t *rv)
677{
678    SV                *sv;
679    int                n, status;
680    char              *line;
681    u_char            *err;
682    STRLEN             len, n_a;
683    ngx_uint_t         i;
684    ngx_connection_t  *c;
685
686    dSP;
687
688    status = 0;
689
690    ENTER;
691    SAVETMPS;
692
693    PUSHMARK(sp);
694
695    sv = sv_2mortal(sv_bless(newRV_noinc(newSViv(PTR2IV(r))), nginx));
696    XPUSHs(sv);
697
698    if (args) {
699        EXTEND(sp, (intptr_t) args[0]);
700
701        for (i = 1; i <= (uintptr_t) args[0]; i++) {
702            PUSHs(sv_2mortal(args[i]));
703        }
704    }
705
706    PUTBACK;
707
708    c = r->connection;
709
710    n = call_sv(sub, G_EVAL);
711
712    SPAGAIN;
713
714    if (n) {
715        if (rv == NULL) {
716            status = POPi;
717
718            ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
719                           "call_sv: %d", status);
720
721        } else {
722            line = SvPVx(POPs, n_a);
723            rv->len = n_a;
724
725            rv->data = ngx_pnalloc(r->pool, n_a);
726            if (rv->data == NULL) {
727                return NGX_ERROR;
728            }
729
730            ngx_memcpy(rv->data, line, n_a);
731        }
732    }
733
734    PUTBACK;
735
736    FREETMPS;
737    LEAVE;
738
739    /* check $@ */
740
741    if (SvTRUE(ERRSV)) {
742
743        err = (u_char *) SvPV(ERRSV, len);
744        while (--len && (err[len] == CR || err[len] == LF)) { /* void */ }
745
746        ngx_log_error(NGX_LOG_ERR, c->log, 0,
747                      "call_sv(\"%V\") failed: \"%*s\"", handler, len + 1, err);
748
749        if (rv) {
750            return NGX_ERROR;
751        }
752
753        return NGX_HTTP_INTERNAL_SERVER_ERROR;
754    }
755
756    if (n != 1) {
757        ngx_log_error(NGX_LOG_ALERT, c->log, 0,
758                      "call_sv(\"%V\") returned %d results", handler, n);
759        status = NGX_OK;
760    }
761
762    if (rv) {
763        return NGX_OK;
764    }
765
766    return (ngx_int_t) status;
767}
768
769
770static void
771ngx_http_perl_eval_anon_sub(pTHX_ ngx_str_t *handler, SV **sv)
772{
773    u_char  *p;
774
775    for (p = handler->data; *p; p++) {
776        if (*p != ' ' && *p != '\t' && *p != CR && *p != LF) {
777            break;
778        }
779    }
780
781    if (ngx_strncmp(p, "sub ", 4) == 0
782        || ngx_strncmp(p, "sub{", 4) == 0
783        || ngx_strncmp(p, "use ", 4) == 0)
784    {
785        *sv = eval_pv((char *) p, FALSE);
786
787        /* eval_pv() does not set ERRSV on failure */
788
789        return;
790    }
791
792    *sv = NULL;
793}
794
795
796static void *
797ngx_http_perl_create_main_conf(ngx_conf_t *cf)
798{
799    ngx_http_perl_main_conf_t  *pmcf;
800
801    pmcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_perl_main_conf_t));
802    if (pmcf == NULL) {
803        return NULL;
804    }
805
806    pmcf->modules = NGX_CONF_UNSET_PTR;
807    pmcf->requires = NGX_CONF_UNSET_PTR;
808
809    return pmcf;
810}
811
812
813static char *
814ngx_http_perl_init_main_conf(ngx_conf_t *cf, void *conf)
815{
816    ngx_http_perl_main_conf_t *pmcf = conf;
817
818    if (pmcf->perl == NULL) {
819        if (ngx_http_perl_init_interpreter(cf, pmcf) != NGX_CONF_OK) {
820            return NGX_CONF_ERROR;
821        }
822    }
823
824    return NGX_CONF_OK;
825}
826
827
828#if (NGX_HAVE_PERL_MULTIPLICITY)
829
830static void
831ngx_http_perl_cleanup_perl(void *data)
832{
833    PerlInterpreter  *perl = data;
834
835    PERL_SET_CONTEXT(perl);
836    PERL_SET_INTERP(perl);
837
838    (void) perl_destruct(perl);
839
840    perl_free(perl);
841
842    if (ngx_perl_term) {
843        ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0, "perl term");
844
845        PERL_SYS_TERM();
846    }
847}
848
849#endif
850
851
852static ngx_int_t
853ngx_http_perl_preconfiguration(ngx_conf_t *cf)
854{
855#if (NGX_HTTP_SSI)
856    ngx_int_t                  rc;
857    ngx_http_ssi_main_conf_t  *smcf;
858
859    smcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_ssi_filter_module);
860
861    rc = ngx_hash_add_key(&smcf->commands, &ngx_http_perl_ssi_command.name,
862                          &ngx_http_perl_ssi_command, NGX_HASH_READONLY_KEY);
863
864    if (rc != NGX_OK) {
865        if (rc == NGX_BUSY) {
866            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
867                               "conflicting SSI command \"%V\"",
868                               &ngx_http_perl_ssi_command.name);
869        }
870
871        return NGX_ERROR;
872    }
873#endif
874
875    return NGX_OK;
876}
877
878
879static void *
880ngx_http_perl_create_loc_conf(ngx_conf_t *cf)
881{
882    ngx_http_perl_loc_conf_t *plcf;
883
884    plcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_perl_loc_conf_t));
885    if (plcf == NULL) {
886        return NULL;
887    }
888
889    /*
890     * set by ngx_pcalloc():
891     *
892     *     plcf->handler = { 0, NULL };
893     */
894
895    return plcf;
896}
897
898
899static char *
900ngx_http_perl_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
901{
902    ngx_http_perl_loc_conf_t *prev = parent;
903    ngx_http_perl_loc_conf_t *conf = child;
904
905    if (conf->sub == NULL) {
906        conf->sub = prev->sub;
907        conf->handler = prev->handler;
908    }
909
910    return NGX_CONF_OK;
911}
912
913
914static char *
915ngx_http_perl(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
916{
917    ngx_http_perl_loc_conf_t *plcf = conf;
918
919    ngx_str_t                  *value;
920    ngx_http_core_loc_conf_t   *clcf;
921    ngx_http_perl_main_conf_t  *pmcf;
922
923    value = cf->args->elts;
924
925    if (plcf->handler.data) {
926        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
927                           "duplicate perl handler \"%V\"", &value[1]);
928        return NGX_CONF_ERROR;
929    }
930
931    pmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_perl_module);
932
933    if (pmcf->perl == NULL) {
934        if (ngx_http_perl_init_interpreter(cf, pmcf) != NGX_CONF_OK) {
935            return NGX_CONF_ERROR;
936        }
937    }
938
939    plcf->handler = value[1];
940
941    {
942
943    dTHXa(pmcf->perl);
944    PERL_SET_CONTEXT(pmcf->perl);
945    PERL_SET_INTERP(pmcf->perl);
946
947    ngx_http_perl_eval_anon_sub(aTHX_ &value[1], &plcf->sub);
948
949    if (plcf->sub == &PL_sv_undef) {
950        ngx_conf_log_error(NGX_LOG_ERR, cf, 0,
951                           "eval_pv(\"%V\") failed", &value[1]);
952        return NGX_CONF_ERROR;
953    }
954
955    if (plcf->sub == NULL) {
956        plcf->sub = newSVpvn((char *) value[1].data, value[1].len);
957    }
958
959    }
960
961    clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
962    clcf->handler = ngx_http_perl_handler;
963
964    return NGX_CONF_OK;
965}
966
967
968static char *
969ngx_http_perl_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
970{
971    ngx_int_t                   index;
972    ngx_str_t                  *value;
973    ngx_http_variable_t        *v;
974    ngx_http_perl_variable_t   *pv;
975    ngx_http_perl_main_conf_t  *pmcf;
976
977    value = cf->args->elts;
978
979    if (value[1].data[0] != '$') {
980        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
981                           "invalid variable name \"%V\"", &value[1]);
982        return NGX_CONF_ERROR;
983    }
984
985    value[1].len--;
986    value[1].data++;
987
988    v = ngx_http_add_variable(cf, &value[1], NGX_HTTP_VAR_CHANGEABLE);
989    if (v == NULL) {
990        return NGX_CONF_ERROR;
991    }
992
993    pv = ngx_palloc(cf->pool, sizeof(ngx_http_perl_variable_t));
994    if (pv == NULL) {
995        return NGX_CONF_ERROR;
996    }
997
998    index = ngx_http_get_variable_index(cf, &value[1]);
999    if (index == NGX_ERROR) {
1000        return NGX_CONF_ERROR;
1001    }
1002
1003    pmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_perl_module);
1004
1005    if (pmcf->perl == NULL) {
1006        if (ngx_http_perl_init_interpreter(cf, pmcf) != NGX_CONF_OK) {
1007            return NGX_CONF_ERROR;
1008        }
1009    }
1010
1011    pv->handler = value[2];
1012
1013    {
1014
1015    dTHXa(pmcf->perl);
1016    PERL_SET_CONTEXT(pmcf->perl);
1017    PERL_SET_INTERP(pmcf->perl);
1018
1019    ngx_http_perl_eval_anon_sub(aTHX_ &value[2], &pv->sub);
1020
1021    if (pv->sub == &PL_sv_undef) {
1022        ngx_conf_log_error(NGX_LOG_ERR, cf, 0,
1023                           "eval_pv(\"%V\") failed", &value[2]);
1024        return NGX_CONF_ERROR;
1025    }
1026
1027    if (pv->sub == NULL) {
1028        pv->sub = newSVpvn((char *) value[2].data, value[2].len);
1029    }
1030
1031    }
1032
1033    v->get_handler = ngx_http_perl_variable;
1034    v->data = (uintptr_t) pv;
1035
1036    return NGX_CONF_OK;
1037}
1038
1039
1040static ngx_int_t
1041ngx_http_perl_init_worker(ngx_cycle_t *cycle)
1042{
1043    ngx_http_perl_main_conf_t  *pmcf;
1044
1045    pmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_perl_module);
1046
1047    if (pmcf) {
1048        dTHXa(pmcf->perl);
1049        PERL_SET_CONTEXT(pmcf->perl);
1050        PERL_SET_INTERP(pmcf->perl);
1051
1052        /* set worker's $$ */
1053
1054        sv_setiv(GvSV(gv_fetchpv("$", TRUE, SVt_PV)), (I32) ngx_pid);
1055    }
1056
1057    return NGX_OK;
1058}
1059
1060
1061static void
1062ngx_http_perl_exit(ngx_cycle_t *cycle)
1063{
1064#if (NGX_HAVE_PERL_MULTIPLICITY)
1065
1066    /*
1067     * the master exit hook is run before global pool cleanup,
1068     * therefore just set flag here
1069     */
1070
1071    ngx_perl_term = 1;
1072
1073#else
1074
1075    if (nginx_stash) {
1076        ngx_log_debug0(NGX_LOG_DEBUG_HTTP, cycle->log, 0, "perl term");
1077
1078        (void) perl_destruct(perl);
1079
1080        perl_free(perl);
1081
1082        PERL_SYS_TERM();
1083    }
1084
1085#endif
1086}
1087