new file mode 100644
--- /dev/null
+++ b/src/http/modules/perl/ngx_http_perl_module.c
@@ -0,0 +1,980 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_http.h>
+#include <ngx_http_perl_module.h>
+
+
+typedef struct {
+    PerlInterpreter  **free_perls;
+    ngx_uint_t         interp;
+    ngx_uint_t         nalloc;
+    ngx_uint_t         interp_max;
+
+    PerlInterpreter   *perl;
+    ngx_str_t          modules;
+    ngx_array_t        requires;
+} ngx_http_perl_main_conf_t;
+
+
+typedef struct {
+    SV                *sub;
+    ngx_str_t          handler;
+} ngx_http_perl_loc_conf_t;
+
+
+typedef struct {
+    SV                *sub;
+    ngx_str_t          handler;
+} ngx_http_perl_variable_t;
+
+
+static ngx_int_t ngx_http_perl_ssi(ngx_http_request_t *r,
+    ngx_http_ssi_ctx_t *ssi_ctx, ngx_str_t **params);
+static ngx_int_t
+    ngx_http_perl_get_interpreter(ngx_http_perl_main_conf_t *pmcf,
+    PerlInterpreter **perl, ngx_log_t *log);
+static ngx_inline void
+    ngx_http_perl_free_interpreter(ngx_http_perl_main_conf_t *pmcf,
+    PerlInterpreter *perl);
+static char *ngx_http_perl_init_interpreter(ngx_conf_t *cf,
+    ngx_http_perl_main_conf_t *pmcf);
+static PerlInterpreter *
+    ngx_http_perl_create_interpreter(ngx_http_perl_main_conf_t *pmcf,
+    ngx_log_t *log);
+static ngx_int_t ngx_http_perl_call_handler(pTHX_ ngx_http_request_t *r,
+    SV *sub, ngx_str_t **args, ngx_str_t *handler, ngx_str_t *rv);
+static void ngx_http_perl_eval_anon_sub(pTHX_ ngx_str_t *handler, SV **sv);
+
+static ngx_int_t ngx_http_perl_preconfiguration(ngx_conf_t *cf);
+static void *ngx_http_perl_create_main_conf(ngx_conf_t *cf);
+static char *ngx_http_perl_init_main_conf(ngx_conf_t *cf, void *conf);
+static void *ngx_http_perl_create_loc_conf(ngx_conf_t *cf);
+static char *ngx_http_perl_merge_loc_conf(ngx_conf_t *cf, void *parent,
+    void *child);
+static char *ngx_http_perl_require(ngx_conf_t *cf, ngx_command_t *cmd,
+    void *conf);
+static char *ngx_http_perl(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+static char *ngx_http_perl_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+static char *ngx_http_perl_interp_max_unsupported(ngx_conf_t *cf, void *post,
+    void *data);
+static void ngx_http_perl_cleanup_perl(void *data);
+
+
+static ngx_conf_post_handler_pt  ngx_http_perl_interp_max_p =
+    ngx_http_perl_interp_max_unsupported;
+
+
+static ngx_command_t  ngx_http_perl_commands[] = {
+
+    { ngx_string("perl_modules"),
+      NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_str_slot,
+      NGX_HTTP_MAIN_CONF_OFFSET,
+      offsetof(ngx_http_perl_main_conf_t, modules),
+      NULL },
+
+    { ngx_string("perl_require"),
+      NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
+      ngx_http_perl_require,
+      NGX_HTTP_MAIN_CONF_OFFSET,
+      0,
+      NULL },
+
+    { ngx_string("perl_interp_max"),
+      NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_num_slot,
+      NGX_HTTP_MAIN_CONF_OFFSET,
+      offsetof(ngx_http_perl_main_conf_t, interp_max),
+      &ngx_http_perl_interp_max_p },
+
+    { ngx_string("perl"),
+      NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_http_perl,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      0,
+      NULL },
+
+    { ngx_string("perl_set"),
+      NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE2,
+      ngx_http_perl_set,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      0,
+      NULL },
+
+      ngx_null_command
+};
+
+
+static ngx_http_module_t  ngx_http_perl_module_ctx = {
+    ngx_http_perl_preconfiguration,        /* preconfiguration */
+    NULL,                                  /* postconfiguration */
+
+    ngx_http_perl_create_main_conf,        /* create main configuration */
+    ngx_http_perl_init_main_conf,          /* init main configuration */
+
+    NULL,                                  /* create server configuration */
+    NULL,                                  /* merge server configuration */
+
+    ngx_http_perl_create_loc_conf,         /* create location configuration */
+    ngx_http_perl_merge_loc_conf           /* merge location configuration */
+};
+
+
+ngx_module_t  ngx_http_perl_module = {
+    NGX_MODULE_V1,
+    &ngx_http_perl_module_ctx,             /* module context */
+    ngx_http_perl_commands,                /* module directives */
+    NGX_HTTP_MODULE,                       /* module type */
+    NULL,                                  /* init master */
+    NULL,                                  /* init module */
+    NULL,                                  /* init process */
+    NULL,                                  /* init thread */
+    NULL,                                  /* exit thread */
+    NULL,                                  /* exit process */
+    NULL,                                  /* exit master */
+    NGX_MODULE_V1_PADDING
+};
+
+
+#define NGX_HTTP_PERL_SSI_SUB  0
+#define NGX_HTTP_PERL_SSI_ARG  1
+
+
+static ngx_http_ssi_param_t  ngx_http_perl_ssi_params[] = {
+    { ngx_string("sub"), NGX_HTTP_PERL_SSI_SUB, 1, 0 },
+    { ngx_string("arg"), NGX_HTTP_PERL_SSI_ARG, 0, 1 },
+    { ngx_null_string, 0, 0, 0 }
+};
+
+
+static ngx_http_ssi_command_t  ngx_http_perl_ssi_command = {
+    ngx_string("perl"), ngx_http_perl_ssi, ngx_http_perl_ssi_params, 0, 1
+};
+
+
+static void
+ngx_http_perl_xs_init(pTHX)
+{
+    newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, __FILE__);
+}
+
+
+static ngx_int_t
+ngx_http_perl_handler(ngx_http_request_t *r)
+{
+    ngx_int_t                   rc;
+    ngx_str_t                   uri, args;
+    ngx_http_perl_ctx_t        *ctx;
+    ngx_http_perl_loc_conf_t   *plcf;
+    ngx_http_perl_main_conf_t  *pmcf;
+
+    /* TODO: Win32 */
+    if (r->zero_in_uri) {
+        return NGX_HTTP_NOT_FOUND;
+    }
+
+    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "perl handler");
+
+    /* mod_perl's content handler assumes that content type was already set */
+
+    if (ngx_http_set_content_type(r) != NGX_OK) {
+        return NGX_HTTP_INTERNAL_SERVER_ERROR;
+    }
+
+    ctx = ngx_http_get_module_ctx(r, ngx_http_perl_module);
+
+    if (ctx == NULL) {
+        ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_perl_ctx_t));
+        if (ctx == NULL) {
+            return NGX_ERROR;
+        }
+
+        ngx_http_set_ctx(r, ctx, ngx_http_perl_module);
+    }
+
+    pmcf = ngx_http_get_module_main_conf(r, ngx_http_perl_module);
+
+    rc = ngx_http_perl_get_interpreter(pmcf, &ctx->perl, r->connection->log);
+
+    if (rc != NGX_OK) {
+        return rc;
+    }
+
+    {
+
+    dTHXa(ctx->perl);
+
+    plcf = ngx_http_get_module_loc_conf(r, ngx_http_perl_module);
+
+    rc = ngx_http_perl_call_handler(aTHX_ r, plcf->sub, NULL,
+                                    &plcf->handler, NULL);
+
+    }
+
+    ngx_http_perl_free_interpreter(pmcf, ctx->perl);
+
+    if (rc > 600) {
+        rc = NGX_OK;
+    }
+
+    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                   "perl handler done: %i", rc);
+
+    if (ctx->redirect_uri.len) {
+        uri = ctx->redirect_uri;
+        args = ctx->redirect_args;
+    }
+
+    ctx->filename = NULL;
+    ctx->redirect_uri.len = 0;
+
+    if (uri.len) {
+        return ngx_http_internal_redirect(r, &uri, &args);
+    }
+
+    if (rc == NGX_OK || rc == NGX_HTTP_OK) {
+        return ngx_http_send_special(r, NGX_HTTP_LAST);
+    }
+
+    return rc;
+}
+
+
+static ngx_int_t
+ngx_http_perl_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
+    uintptr_t data)
+{
+    ngx_http_perl_variable_t *pv = (ngx_http_perl_variable_t *) data;
+
+    ngx_int_t                   rc;
+    ngx_str_t                   value;
+    ngx_http_perl_ctx_t        *ctx;
+    ngx_http_perl_main_conf_t  *pmcf;
+
+    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                   "perl variable handler");
+
+    ctx = ngx_http_get_module_ctx(r, ngx_http_perl_module);
+
+    if (ctx == NULL) {
+        ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_perl_ctx_t));
+        if (ctx == NULL) {
+            return NGX_ERROR;
+        }
+
+        ngx_http_set_ctx(r, ctx, ngx_http_perl_module);
+    }
+
+    pmcf = ngx_http_get_module_main_conf(r, ngx_http_perl_module);
+
+    rc = ngx_http_perl_get_interpreter(pmcf, &ctx->perl, r->connection->log);
+
+    if (rc != NGX_OK) {
+        return rc;
+    }
+
+    value.data = NULL;
+
+    {
+
+    dTHXa(ctx->perl);
+
+    rc = ngx_http_perl_call_handler(aTHX_ r, pv->sub, NULL,
+                                    &pv->handler, &value);
+
+    }
+
+    ngx_http_perl_free_interpreter(pmcf, ctx->perl);
+
+    if (value.data) {
+        v->len = value.len;
+        v->valid = 1;
+        v->no_cachable = 0;
+        v->not_found = 0;
+        v->data = value.data;
+
+    } else {
+        v->not_found = 1;
+    }
+
+    ctx->filename = NULL;
+    ctx->redirect_uri.len = 0;
+
+    return rc;
+}
+
+
+static ngx_int_t
+ngx_http_perl_ssi(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ssi_ctx,
+    ngx_str_t **params)
+{
+    SV                         *sv;
+    ngx_int_t                   rc;
+    ngx_str_t                  *handler;
+    ngx_http_perl_ctx_t        *ctx;
+    ngx_http_perl_main_conf_t  *pmcf;
+
+    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                   "perl ssi handler");
+
+    pmcf = ngx_http_get_module_main_conf(r, ngx_http_perl_module);
+
+    ctx = ngx_http_get_module_ctx(r, ngx_http_perl_module);
+
+    if (ctx == NULL) {
+        ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_perl_ctx_t));
+        if (ctx == NULL) {
+            return NGX_ERROR;
+        }
+
+        ngx_http_set_ctx(r, ctx, ngx_http_perl_module);
+    }
+
+    rc = ngx_http_perl_get_interpreter(pmcf, &ctx->perl, r->connection->log);
+
+    if (rc != NGX_OK) {
+        return rc;
+    }
+
+    ctx->ssi = ssi_ctx;
+
+    handler = params[NGX_HTTP_PERL_SSI_SUB];
+    handler->data[handler->len] = '\0';
+
+    {
+
+    dTHXa(ctx->perl);
+
+#if 0
+
+    ngx_http_perl_eval_anon_sub(aTHX_ handler, &sv);
+
+    if (sv == &PL_sv_undef) {
+        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+                      "eval_pv(\"%V\") failed", handler);
+        return NGX_ERROR;
+    }
+
+    if (sv == NULL) {
+        sv = newSVpvn((char *) handler->data, handler->len);
+    }
+
+#endif
+
+    sv = newSVpvn((char *) handler->data, handler->len);
+
+    rc = ngx_http_perl_call_handler(aTHX_ r, sv, &params[NGX_HTTP_PERL_SSI_ARG],
+                                    handler, NULL);
+
+    SvREFCNT_dec(sv);
+
+    }
+
+    ngx_http_perl_free_interpreter(pmcf, ctx->perl);
+
+    ctx->filename = NULL;
+    ctx->redirect_uri.len = 0;
+    ctx->ssi = NULL;
+
+    return rc;
+}
+
+
+static ngx_int_t
+ngx_http_perl_get_interpreter(ngx_http_perl_main_conf_t *pmcf,
+    PerlInterpreter **perl, ngx_log_t *log)
+{
+    if (pmcf->interp) {
+        pmcf->interp--;
+
+        *perl = pmcf->free_perls[pmcf->interp];
+
+        return NGX_OK;
+    }
+
+    if (pmcf->nalloc < pmcf->interp_max) {
+        *perl = ngx_http_perl_create_interpreter(pmcf, log);
+
+        if (*perl) {
+            return NGX_OK;
+        }
+
+        return NGX_HTTP_INTERNAL_SERVER_ERROR;
+    }
+
+    ngx_log_error(NGX_LOG_ALERT, log, 0, "no free perl interpreter");
+
+    return NGX_HTTP_SERVICE_UNAVAILABLE;
+}
+
+
+static ngx_inline void
+ngx_http_perl_free_interpreter(ngx_http_perl_main_conf_t *pmcf,
+    PerlInterpreter *perl)
+{
+    pmcf->free_perls[pmcf->interp++] = perl;
+}
+
+
+static char *
+ngx_http_perl_init_interpreter(ngx_conf_t *cf, ngx_http_perl_main_conf_t *pmcf)
+{
+    ngx_pool_cleanup_t         *cln;
+
+    cln = ngx_pool_cleanup_add(cf->pool, 0);
+    if (cln == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+#ifdef NGX_PERL_MODULES
+    if (pmcf->modules.data == NULL) {
+        pmcf->modules.data = NGX_PERL_MODULES;
+    }
+#endif
+
+    PERL_SYS_INIT(&ngx_argc, &ngx_argv);
+
+    pmcf->perl = ngx_http_perl_create_interpreter(pmcf, cf->log);
+
+    if (pmcf->perl == NULL) {
+        PERL_SYS_TERM();
+        return NGX_CONF_ERROR;
+    }
+
+    cln->handler = ngx_http_perl_cleanup_perl;
+    cln->data = pmcf->perl;
+
+    return NGX_CONF_OK;
+}
+
+
+static PerlInterpreter *
+ngx_http_perl_create_interpreter(ngx_http_perl_main_conf_t *pmcf,
+    ngx_log_t *log)
+{
+    int                n;
+    char              *embedding[6];
+    char             **script;
+    STRLEN             len;
+    ngx_str_t          err;
+    ngx_uint_t         i;
+    PerlInterpreter   *perl;
+
+    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "create perl interpreter");
+
+#if (NGX_HAVE_PERL_CLONE)
+
+    if (pmcf->perl) {
+
+        perl = perl_clone(pmcf->perl, CLONEf_KEEP_PTR_TABLE);
+        if (perl == NULL) {
+            ngx_log_error(NGX_LOG_ALERT, log, 0, "perl_clone() failed");
+            return NULL;
+        }
+
+        {
+
+        dTHXa(perl);
+
+        ptr_table_free(PL_ptr_table);
+        PL_ptr_table = NULL;
+
+        }
+
+        pmcf->nalloc++;
+
+        return perl;
+    }
+
+#endif
+
+    perl = perl_alloc();
+    if (perl == NULL) {
+        ngx_log_error(NGX_LOG_ALERT, log, 0, "perl_alloc() failed");
+        return NULL;
+    }
+
+    perl_construct(perl);
+
+    {
+
+    dTHXa(perl);
+
+#ifdef PERL_EXIT_DESTRUCT_END
+    PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
+#endif
+
+    embedding[0] = "";
+
+    if (pmcf->modules.data) {
+        embedding[1] = "-I";
+        embedding[2] = (char *) pmcf->modules.data;
+        n = 3;
+
+    } else {
+        n = 1;
+    }
+
+    embedding[n++] = "-Mnginx";
+    embedding[n++] = "-e";
+    embedding[n++] = "0";
+
+    n = perl_parse(perl, ngx_http_perl_xs_init, n, embedding, NULL);
+
+    if (n != 0) {
+        ngx_log_error(NGX_LOG_ALERT, log, 0, "perl_parse() failed: %d", n);
+        goto fail;
+    }
+
+    script = pmcf->requires.elts;
+    for (i = 0; i < pmcf->requires.nelts; i++) {
+        require_pv(script[i]);
+
+        if (SvTRUE(ERRSV)) {
+
+            err.data = (u_char *) SvPV(ERRSV, len);
+            for (len--; err.data[len] == LF || err.data[len] == CR; len--) {
+                /* void */
+            }
+            err.len = len + 1;
+
+            ngx_log_error(NGX_LOG_EMERG, log, 0,
+                          "require_pv(\"%s\") failed: \"%V\"", script[i], &err);
+            goto fail;
+        }
+    }
+
+    }
+
+    pmcf->nalloc++;
+
+    return perl;
+
+fail:
+
+    (void) perl_destruct(perl);
+
+    perl_free(perl);
+
+    return NULL;
+}
+
+
+#if (__INTEL_COMPILER)
+/*
+ * disable 'declaration hides parameter "my_perl"' warning for ENTER and LEAVE
+ */
+#pragma warning(disable:1599)
+#endif
+
+
+static ngx_int_t
+ngx_http_perl_call_handler(pTHX_ ngx_http_request_t *r, SV *sub,
+    ngx_str_t **args, ngx_str_t *handler, ngx_str_t *rv)
+{
+    SV          *sv;
+    int          n, status;
+    char        *line;
+    STRLEN       len, n_a;
+    ngx_str_t    err;
+    ngx_uint_t   i;
+
+    dSP;
+
+    status = 0;
+
+    ENTER;
+    SAVETMPS;
+
+    PUSHMARK(sp);
+
+    sv = sv_newmortal();
+    sv_setref_pv(sv, "nginx", r);
+    XPUSHs(sv);
+
+    if (args) {
+        for (i = 0; args[i]; i++) { /* void */ }
+
+        EXTEND(sp, (int) i);
+
+        for (i = 0; args[i]; i++) {
+            PUSHs(sv_2mortal(newSVpvn((char *) args[i]->data, args[i]->len)));
+        }
+    }
+
+    PUTBACK;
+
+    n = call_sv(sub, G_EVAL);
+
+    SPAGAIN;
+
+    if (n) {
+        if (rv == NULL) {
+            status = POPi;
+
+            ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                           "call_sv: %d", status);
+
+        } else {
+            line = POPpx;
+            rv->len = n_a;
+
+            rv->data = ngx_palloc(r->pool, n_a);
+            if (rv->data == NULL) {
+                return NGX_ERROR;
+            }
+
+            ngx_memcpy(rv->data, line, n_a);
+        }
+    }
+
+    PUTBACK;
+
+    FREETMPS;
+    LEAVE;
+
+    /* check $@ */
+
+    if (SvTRUE(ERRSV)) {
+
+        err.data = (u_char *) SvPV(ERRSV, len);
+        for (len--; err.data[len] == LF || err.data[len] == CR; len--) {
+            /* void */
+        }
+        err.len = len + 1;
+
+        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+                      "call_sv(\"%V\") failed: \"%V\"",
+                      handler, &err);
+
+        if (rv) {
+            return NGX_ERROR;
+        }
+
+        return NGX_HTTP_INTERNAL_SERVER_ERROR;
+    }
+
+    if (n != 1) {
+        ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
+                      "call_sv(\"%V\") returned %d results", handler, n);
+        status = NGX_OK;
+    }
+
+    if (rv) {
+        return NGX_OK;
+    }
+
+    return (ngx_int_t) status;
+}
+
+
+#if (__INTEL_COMPILER)
+#pragma warning(default:1599)
+#endif
+
+
+static void
+ngx_http_perl_eval_anon_sub(pTHX_ ngx_str_t *handler, SV **sv)
+{
+    if (ngx_strncmp(handler->data, "sub ", 4) == 0
+        || ngx_strncmp(handler->data, "use ", 4) == 0)
+    {
+        *sv = eval_pv((char *) handler->data, FALSE);
+
+        return;
+    }
+
+    *sv = NULL;
+}
+
+
+static void *
+ngx_http_perl_create_main_conf(ngx_conf_t *cf)
+{
+    ngx_http_perl_main_conf_t  *pmcf;
+
+    pmcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_perl_main_conf_t));
+    if (pmcf == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    pmcf->interp_max = NGX_CONF_UNSET_UINT;
+
+    if (ngx_array_init(&pmcf->requires, cf->pool, 1, sizeof(u_char *))
+        != NGX_OK)
+    {
+        return NULL;
+    }
+
+    return pmcf;
+}
+
+
+static char *
+ngx_http_perl_init_main_conf(ngx_conf_t *cf, void *conf)
+{
+    ngx_http_perl_main_conf_t *pmcf = conf;
+
+#if (NGX_HAVE_PERL_CLONE || NGX_HAVE_PERL_MULTIPLICITY)
+    ngx_conf_init_unsigned_value(pmcf->interp_max, 10);
+#else
+    ngx_conf_init_unsigned_value(pmcf->interp_max, 1);
+#endif
+
+    pmcf->free_perls = ngx_pcalloc(cf->pool,
+                                  pmcf->interp_max * sizeof(PerlInterpreter *));
+    if (pmcf->free_perls == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    if (pmcf->perl == NULL) {
+        if (ngx_http_perl_init_interpreter(cf, pmcf) != NGX_CONF_OK) {
+            return NGX_CONF_ERROR;
+        }
+    }
+
+#if !(NGX_HAVE_PERL_CLONE)
+    ngx_http_perl_free_interpreter(pmcf, pmcf->perl);
+#endif
+
+    return NGX_CONF_OK;
+}
+
+
+static void
+ngx_http_perl_cleanup_perl(void *data)
+{
+    PerlInterpreter *perl = data;
+
+    (void) perl_destruct(perl);
+
+    perl_free(perl);
+
+    PERL_SYS_TERM();
+}
+
+
+static ngx_int_t
+ngx_http_perl_preconfiguration(ngx_conf_t *cf)
+{
+    ngx_int_t                  rc;
+    ngx_http_ssi_main_conf_t  *smcf;
+
+    smcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_ssi_filter_module);
+
+    rc = ngx_hash_add_key(&smcf->commands, &ngx_http_perl_ssi_command.name,
+                          &ngx_http_perl_ssi_command, NGX_HASH_READONLY_KEY);
+
+    if (rc != NGX_OK) {
+        if (rc == NGX_BUSY) {
+            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                               "conflicting SSI command \"%V\"",
+                               &ngx_http_perl_ssi_command.name);
+        }
+
+        return NGX_ERROR;
+    }
+
+    return NGX_OK;
+}
+
+
+static void *
+ngx_http_perl_create_loc_conf(ngx_conf_t *cf)
+{
+    ngx_http_perl_loc_conf_t *plcf;
+
+    plcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_perl_loc_conf_t));
+    if (plcf == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    /*
+     * set by ngx_pcalloc():
+     *
+     *     plcf->handler = { 0, NULL };
+     */
+
+    return plcf;
+}
+
+
+static char *
+ngx_http_perl_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
+{
+    ngx_http_perl_loc_conf_t *prev = parent;
+    ngx_http_perl_loc_conf_t *conf = child;
+
+    if (conf->sub == NULL) {
+        conf->sub = prev->sub;
+        conf->handler = prev->handler;
+    }
+
+    return NGX_CONF_OK;
+}
+
+
+static char *
+ngx_http_perl_require(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+    ngx_http_perl_main_conf_t *pmcf = conf;
+
+    u_char     **p;
+    ngx_str_t   *value;
+
+    value = cf->args->elts;
+
+    p = ngx_array_push(&pmcf->requires);
+
+    if (p == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    *p = value[1].data;
+
+    return NGX_CONF_OK;
+}
+
+
+static char *
+ngx_http_perl(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+    ngx_http_perl_loc_conf_t *plcf = conf;
+
+    ngx_str_t                  *value;
+    ngx_http_core_loc_conf_t   *clcf;
+    ngx_http_perl_main_conf_t  *pmcf;
+
+    value = cf->args->elts;
+
+    if (plcf->handler.data) {
+        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                           "duplicate perl handler \"%V\"", &value[1]);
+        return NGX_CONF_ERROR;
+    }
+
+    pmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_perl_module);
+
+    if (pmcf->perl == NULL) {
+        if (ngx_http_perl_init_interpreter(cf, pmcf) != NGX_CONF_OK) {
+            return NGX_CONF_ERROR;
+        }
+    }
+
+    plcf->handler = value[1];
+
+    {
+
+    dTHXa(pmcf->perl);
+
+    ngx_http_perl_eval_anon_sub(aTHX_ &value[1], &plcf->sub);
+
+    if (plcf->sub == &PL_sv_undef) {
+        ngx_conf_log_error(NGX_LOG_ERR, cf, 0,
+                           "eval_pv(\"%V\") failed", &value[1]);
+        return NGX_CONF_ERROR;
+    }
+
+    if (plcf->sub == NULL) {
+        plcf->sub = newSVpvn((char *) value[1].data, value[1].len);
+    }
+
+    }
+
+    clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
+    clcf->handler = ngx_http_perl_handler;
+
+    return NGX_CONF_OK;
+}
+
+
+static char *
+ngx_http_perl_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+    ngx_int_t                   index;
+    ngx_str_t                  *value;
+    ngx_http_variable_t        *v;
+    ngx_http_perl_variable_t   *pv;
+    ngx_http_perl_main_conf_t  *pmcf;
+
+    value = cf->args->elts;
+
+    if (value[1].data[0] != '$') {
+        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                           "invalid variable name \"%V\"", &value[1]);
+        return NGX_CONF_ERROR;
+    }
+
+    value[1].len--;
+    value[1].data++;
+
+    v = ngx_http_add_variable(cf, &value[1], NGX_HTTP_VAR_CHANGABLE);
+    if (v == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    pv = ngx_palloc(cf->pool, sizeof(ngx_http_perl_variable_t));
+    if (pv == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    index = ngx_http_get_variable_index(cf, &value[1]);
+    if (index == NGX_ERROR) {
+        return NGX_CONF_ERROR;
+    }
+
+    pmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_perl_module);
+
+    if (pmcf->perl == NULL) {
+        if (ngx_http_perl_init_interpreter(cf, pmcf) != NGX_CONF_OK) {
+            return NGX_CONF_ERROR;
+        }
+    }
+
+    pv->handler = value[2];
+
+    {
+
+    dTHXa(pmcf->perl);
+
+    ngx_http_perl_eval_anon_sub(aTHX_ &value[2], &pv->sub);
+
+    if (pv->sub == &PL_sv_undef) {
+        ngx_conf_log_error(NGX_LOG_ERR, cf, 0,
+                           "eval_pv(\"%V\") failed", &value[2]);
+        return NGX_CONF_ERROR;
+    }
+
+    if (pv->sub == NULL) {
+        pv->sub = newSVpvn((char *) value[2].data, value[2].len);
+    }
+
+    }
+
+    v->handler = ngx_http_perl_variable;
+    v->data = (uintptr_t) pv;
+
+    return NGX_CONF_OK;
+}
+
+
+static char *
+ngx_http_perl_interp_max_unsupported(ngx_conf_t *cf, void *post, void *data)
+{
+#if (NGX_HAVE_PERL_CLONE || NGX_HAVE_PERL_MULTIPLICITY)
+
+    return NGX_CONF_OK;
+
+#else
+
+    return "to use perl_interp_max you have to build perl with "
+           "-Dusemultiplicity or -Dusethreads options";
+
+#endif
+}