import of nginx 1.0.6 with a bundled libpcre needed for pcre to work

properly.
this is not yet linked to the build but we would like to work on it
in tree to provide an apache replacement for base

1 files changed, 1666 insertions, 0 deletions

diff --git a/usr.sbin/nginx/src/http/modules/ngx_http_scgi_module.c b/usr.sbin/nginx/src/http/modules/ngx_http_scgi_module.c
new file mode 100644
index 00000000000..a4230a956d6
--- /dev/null
+++ b/usr.sbin/nginx/src/http/modules/ngx_http_scgi_module.c
@@ -0,0 +1,1666 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) Manlio Perillo (manlio.perillo@gmail.com)
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_http.h>
+
+
+typedef struct {
+    ngx_http_upstream_conf_t   upstream;
+
+    ngx_array_t               *flushes;
+    ngx_array_t               *params_len;
+    ngx_array_t               *params;
+    ngx_array_t               *params_source;
+
+    ngx_hash_t                 headers_hash;
+    ngx_uint_t                 header_params;
+
+    ngx_array_t               *scgi_lengths;
+    ngx_array_t               *scgi_values;
+
+#if (NGX_HTTP_CACHE)
+    ngx_http_complex_value_t   cache_key;
+#endif
+} ngx_http_scgi_loc_conf_t;
+
+
+static ngx_int_t ngx_http_scgi_eval(ngx_http_request_t *r,
+    ngx_http_scgi_loc_conf_t *scf);
+static ngx_int_t ngx_http_scgi_create_request(ngx_http_request_t *r);
+static ngx_int_t ngx_http_scgi_reinit_request(ngx_http_request_t *r);
+static ngx_int_t ngx_http_scgi_process_status_line(ngx_http_request_t *r);
+static ngx_int_t ngx_http_scgi_process_header(ngx_http_request_t *r);
+static ngx_int_t ngx_http_scgi_process_header(ngx_http_request_t *r);
+static void ngx_http_scgi_abort_request(ngx_http_request_t *r);
+static void ngx_http_scgi_finalize_request(ngx_http_request_t *r, ngx_int_t rc);
+
+static void *ngx_http_scgi_create_loc_conf(ngx_conf_t *cf);
+static char *ngx_http_scgi_merge_loc_conf(ngx_conf_t *cf, void *parent,
+    void *child);
+
+static char *ngx_http_scgi_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+static char *ngx_http_scgi_store(ngx_conf_t *cf, ngx_command_t *cmd,
+    void *conf);
+
+#if (NGX_HTTP_CACHE)
+static ngx_int_t ngx_http_scgi_create_key(ngx_http_request_t *r);
+static char *ngx_http_scgi_cache(ngx_conf_t *cf, ngx_command_t *cmd,
+    void *conf);
+static char *ngx_http_scgi_cache_key(ngx_conf_t *cf, ngx_command_t *cmd,
+    void *conf);
+#endif
+
+
+static ngx_conf_bitmask_t ngx_http_scgi_next_upstream_masks[] = {
+    { ngx_string("error"), NGX_HTTP_UPSTREAM_FT_ERROR },
+    { ngx_string("timeout"), NGX_HTTP_UPSTREAM_FT_TIMEOUT },
+    { ngx_string("invalid_header"), NGX_HTTP_UPSTREAM_FT_INVALID_HEADER },
+    { ngx_string("http_500"), NGX_HTTP_UPSTREAM_FT_HTTP_500 },
+    { ngx_string("http_503"), NGX_HTTP_UPSTREAM_FT_HTTP_503 },
+    { ngx_string("http_404"), NGX_HTTP_UPSTREAM_FT_HTTP_404 },
+    { ngx_string("updating"), NGX_HTTP_UPSTREAM_FT_UPDATING },
+    { ngx_string("off"), NGX_HTTP_UPSTREAM_FT_OFF },
+    { ngx_null_string, 0 }
+};
+
+
+ngx_module_t  ngx_http_scgi_module;
+
+
+static ngx_command_t ngx_http_scgi_commands[] = {
+
+    { ngx_string("scgi_pass"),
+      NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_TAKE1,
+      ngx_http_scgi_pass,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      0,
+      NULL },
+
+    { ngx_string("scgi_store"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_http_scgi_store,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      0,
+      NULL },
+
+    { ngx_string("scgi_store_access"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE123,
+      ngx_conf_set_access_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.store_access),
+      NULL },
+
+    { ngx_string("scgi_ignore_client_abort"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
+      ngx_conf_set_flag_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.ignore_client_abort),
+      NULL },
+
+    { ngx_string("scgi_bind"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_http_upstream_bind_set_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.local),
+      NULL },
+
+    { ngx_string("scgi_connect_timeout"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_msec_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.connect_timeout),
+      NULL },
+
+    { ngx_string("scgi_send_timeout"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_msec_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.send_timeout),
+      NULL },
+
+    { ngx_string("scgi_buffer_size"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_size_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.buffer_size),
+      NULL },
+
+    { ngx_string("scgi_pass_request_headers"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
+      ngx_conf_set_flag_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.pass_request_headers),
+      NULL },
+
+    { ngx_string("scgi_pass_request_body"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
+      ngx_conf_set_flag_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.pass_request_body),
+      NULL },
+
+    { ngx_string("scgi_intercept_errors"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
+      ngx_conf_set_flag_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.intercept_errors),
+      NULL },
+
+    { ngx_string("scgi_read_timeout"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_msec_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.read_timeout),
+      NULL },
+
+    { ngx_string("scgi_buffers"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
+      ngx_conf_set_bufs_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.bufs),
+      NULL },
+
+    { ngx_string("scgi_busy_buffers_size"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_size_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.busy_buffers_size_conf),
+      NULL },
+
+#if (NGX_HTTP_CACHE)
+
+    { ngx_string("scgi_cache"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_http_scgi_cache,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      0,
+      NULL },
+
+    { ngx_string("scgi_cache_key"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_http_scgi_cache_key,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      0,
+      NULL },
+
+    { ngx_string("scgi_cache_path"),
+      NGX_HTTP_MAIN_CONF|NGX_CONF_2MORE,
+      ngx_http_file_cache_set_slot,
+      0,
+      0,
+      &ngx_http_scgi_module },
+
+    { ngx_string("scgi_cache_bypass"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
+      ngx_http_set_predicate_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.cache_bypass),
+      NULL },
+
+    { ngx_string("scgi_no_cache"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
+      ngx_http_set_predicate_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.no_cache),
+      NULL },
+
+    { ngx_string("scgi_cache_valid"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
+      ngx_http_file_cache_valid_set_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.cache_valid),
+      NULL },
+
+    { ngx_string("scgi_cache_min_uses"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_num_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.cache_min_uses),
+      NULL },
+
+    { ngx_string("scgi_cache_use_stale"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
+      ngx_conf_set_bitmask_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.cache_use_stale),
+      &ngx_http_scgi_next_upstream_masks },
+
+    { ngx_string("scgi_cache_methods"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
+      ngx_conf_set_bitmask_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.cache_methods),
+      &ngx_http_upstream_cache_method_mask },
+
+#endif
+
+    { ngx_string("scgi_temp_path"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1234,
+      ngx_conf_set_path_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.temp_path),
+      NULL },
+
+    { ngx_string("scgi_max_temp_file_size"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_size_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.max_temp_file_size_conf),
+      NULL },
+
+    { ngx_string("scgi_temp_file_write_size"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_size_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.temp_file_write_size_conf),
+      NULL },
+
+    { ngx_string("scgi_next_upstream"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
+      ngx_conf_set_bitmask_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.next_upstream),
+      &ngx_http_scgi_next_upstream_masks },
+
+    { ngx_string("scgi_param"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
+      ngx_conf_set_keyval_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, params_source),
+      NULL },
+
+    { ngx_string("scgi_pass_header"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_str_array_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.pass_headers),
+      NULL },
+
+    { ngx_string("scgi_hide_header"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_str_array_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.hide_headers),
+      NULL },
+
+    { ngx_string("scgi_ignore_headers"),
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
+      ngx_conf_set_bitmask_slot,
+      NGX_HTTP_LOC_CONF_OFFSET,
+      offsetof(ngx_http_scgi_loc_conf_t, upstream.ignore_headers),
+      &ngx_http_upstream_ignore_headers_masks },
+
+      ngx_null_command
+};
+
+
+static ngx_http_module_t ngx_http_scgi_module_ctx = {
+    NULL,                                  /* preconfiguration */
+    NULL,                                  /* postconfiguration */
+
+    NULL,                                  /* create main configuration */
+    NULL,                                  /* init main configuration */
+
+    NULL,                                  /* create server configuration */
+    NULL,                                  /* merge server configuration */
+
+    ngx_http_scgi_create_loc_conf,         /* create location configuration */
+    ngx_http_scgi_merge_loc_conf           /* merge location configuration */
+};
+
+
+ngx_module_t ngx_http_scgi_module = {
+    NGX_MODULE_V1,
+    &ngx_http_scgi_module_ctx,             /* module context */
+    ngx_http_scgi_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
+};
+
+
+static ngx_str_t ngx_http_scgi_hide_headers[] = {
+    ngx_string("Status"),
+    ngx_string("X-Accel-Expires"),
+    ngx_string("X-Accel-Redirect"),
+    ngx_string("X-Accel-Limit-Rate"),
+    ngx_string("X-Accel-Buffering"),
+    ngx_string("X-Accel-Charset"),
+    ngx_null_string
+};
+
+
+#if (NGX_HTTP_CACHE)
+
+static ngx_keyval_t  ngx_http_scgi_cache_headers[] = {
+    { ngx_string("HTTP_IF_MODIFIED_SINCE"), ngx_string("") },
+    { ngx_string("HTTP_IF_UNMODIFIED_SINCE"), ngx_string("") },
+    { ngx_string("HTTP_IF_NONE_MATCH"), ngx_string("") },
+    { ngx_string("HTTP_IF_MATCH"), ngx_string("") },
+    { ngx_string("HTTP_RANGE"), ngx_string("") },
+    { ngx_string("HTTP_IF_RANGE"), ngx_string("") },
+    { ngx_null_string, ngx_null_string }
+};
+
+#endif
+
+
+static ngx_path_init_t ngx_http_scgi_temp_path = {
+    ngx_string(NGX_HTTP_SCGI_TEMP_PATH), { 1, 2, 0 }
+};
+
+
+static ngx_int_t
+ngx_http_scgi_handler(ngx_http_request_t *r)
+{
+    ngx_int_t                  rc;
+    ngx_http_status_t         *status;
+    ngx_http_upstream_t       *u;
+    ngx_http_scgi_loc_conf_t  *scf;
+
+    if (r->subrequest_in_memory) {
+        ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
+                      "ngx_http_scgi_module does not support "
+                      "subrequests in memory");
+        return NGX_HTTP_INTERNAL_SERVER_ERROR;
+    }
+
+    if (ngx_http_upstream_create(r) != NGX_OK) {
+        return NGX_HTTP_INTERNAL_SERVER_ERROR;
+    }
+
+    status = ngx_pcalloc(r->pool, sizeof(ngx_http_status_t));
+    if (status == NULL) {
+        return NGX_HTTP_INTERNAL_SERVER_ERROR;
+    }
+
+    ngx_http_set_ctx(r, status, ngx_http_scgi_module);
+
+    scf = ngx_http_get_module_loc_conf(r, ngx_http_scgi_module);
+
+    if (scf->scgi_lengths) {
+        if (ngx_http_scgi_eval(r, scf) != NGX_OK) {
+            return NGX_HTTP_INTERNAL_SERVER_ERROR;
+        }
+    }
+
+    u = r->upstream;
+
+    ngx_str_set(&u->schema, "scgi://");
+    u->output.tag = (ngx_buf_tag_t) &ngx_http_scgi_module;
+
+    u->conf = &scf->upstream;
+
+#if (NGX_HTTP_CACHE)
+    u->create_key = ngx_http_scgi_create_key;
+#endif
+    u->create_request = ngx_http_scgi_create_request;
+    u->reinit_request = ngx_http_scgi_reinit_request;
+    u->process_header = ngx_http_scgi_process_status_line;
+    u->abort_request = ngx_http_scgi_abort_request;
+    u->finalize_request = ngx_http_scgi_finalize_request;
+
+    u->buffering = 1;
+
+    u->pipe = ngx_pcalloc(r->pool, sizeof(ngx_event_pipe_t));
+    if (u->pipe == NULL) {
+        return NGX_HTTP_INTERNAL_SERVER_ERROR;
+    }
+
+    u->pipe->input_filter = ngx_event_pipe_copy_input_filter;
+    u->pipe->input_ctx = r;
+
+    rc = ngx_http_read_client_request_body(r, ngx_http_upstream_init);
+
+    if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
+        return rc;
+    }
+
+    return NGX_DONE;
+}
+
+
+static ngx_int_t
+ngx_http_scgi_eval(ngx_http_request_t *r, ngx_http_scgi_loc_conf_t * scf)
+{
+    ngx_url_t             url;
+    ngx_http_upstream_t  *u;
+
+    ngx_memzero(&url, sizeof(ngx_url_t));
+
+    if (ngx_http_script_run(r, &url.url, scf->scgi_lengths->elts, 0,
+                            scf->scgi_values->elts)
+        == NULL)
+    {
+        return NGX_ERROR;
+    }
+
+    url.no_resolve = 1;
+
+    if (ngx_parse_url(r->pool, &url) != NGX_OK) {
+        if (url.err) {
+            ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+                          "%s in upstream \"%V\"", url.err, &url.url);
+        }
+
+        return NGX_ERROR;
+    }
+
+    u = r->upstream;
+
+    u->resolved = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_resolved_t));
+    if (u->resolved == NULL) {
+        return NGX_ERROR;
+    }
+
+    if (url.addrs && url.addrs[0].sockaddr) {
+        u->resolved->sockaddr = url.addrs[0].sockaddr;
+        u->resolved->socklen = url.addrs[0].socklen;
+        u->resolved->naddrs = 1;
+        u->resolved->host = url.addrs[0].name;
+
+    } else {
+        u->resolved->host = url.host;
+        u->resolved->port = url.port;
+        u->resolved->no_port = url.no_port;
+    }
+
+    return NGX_OK;
+}
+
+
+#if (NGX_HTTP_CACHE)
+
+static ngx_int_t
+ngx_http_scgi_create_key(ngx_http_request_t *r)
+{
+    ngx_str_t                 *key;
+    ngx_http_scgi_loc_conf_t  *scf;
+
+    key = ngx_array_push(&r->cache->keys);
+    if (key == NULL) {
+        return NGX_ERROR;
+    }
+
+    scf = ngx_http_get_module_loc_conf(r, ngx_http_scgi_module);
+
+    if (ngx_http_complex_value(r, &scf->cache_key, key) != NGX_OK) {
+        return NGX_ERROR;
+    }
+
+    return NGX_OK;
+}
+
+#endif
+
+
+static ngx_int_t
+ngx_http_scgi_create_request(ngx_http_request_t *r)
+{
+    u_char                        ch, *key, *val, *lowcase_key;
+    size_t                        len, allocated;
+    ngx_buf_t                    *b;
+    ngx_str_t                    *content_length;
+    ngx_uint_t                    i, n, hash, header_params;
+    ngx_chain_t                  *cl, *body;
+    ngx_list_part_t              *part;
+    ngx_table_elt_t              *header, **ignored;
+    ngx_http_script_code_pt       code;
+    ngx_http_script_engine_t      e, le;
+    ngx_http_scgi_loc_conf_t     *scf;
+    ngx_http_script_len_code_pt   lcode;
+    static ngx_str_t              zero = ngx_string("0");
+
+    content_length = r->headers_in.content_length ?
+                         &r->headers_in.content_length->value : &zero;
+
+    len = sizeof("CONTENT_LENGTH") + content_length->len + 1;
+
+    header_params = 0;
+    ignored = NULL;
+
+    scf = ngx_http_get_module_loc_conf(r, ngx_http_scgi_module);
+
+    if (scf->params_len) {
+        ngx_memzero(&le, sizeof(ngx_http_script_engine_t));
+
+        ngx_http_script_flush_no_cacheable_variables(r, scf->flushes);
+        le.flushed = 1;
+
+        le.ip = scf->params_len->elts;
+        le.request = r;
+
+        while (*(uintptr_t *) le.ip) {
+
+            lcode = *(ngx_http_script_len_code_pt *) le.ip;
+            len += lcode(&le);
+
+            while (*(uintptr_t *) le.ip) {
+                lcode = *(ngx_http_script_len_code_pt *) le.ip;
+                len += lcode(&le) + 1;
+            }
+            le.ip += sizeof(uintptr_t);
+        }
+    }
+
+    if (scf->upstream.pass_request_headers) {
+
+        allocated = 0;
+        lowcase_key = NULL;
+
+        if (scf->header_params) {
+            n = 0;
+            part = &r->headers_in.headers.part;
+
+            while (part) {
+                n += part->nelts;
+                part = part->next;
+            }
+
+            ignored = ngx_palloc(r->pool, n * sizeof(void *));
+            if (ignored == NULL) {
+                return NGX_ERROR;
+            }
+        }
+
+        part = &r->headers_in.headers.part;
+        header = part->elts;
+
+        for (i = 0; /* void */; i++) {
+
+            if (i >= part->nelts) {
+                if (part->next == NULL) {
+                    break;
+                }
+
+                part = part->next;
+                header = part->elts;
+                i = 0;
+            }
+
+            if (scf->header_params) {
+                if (allocated < header[i].key.len) {
+                    allocated = header[i].key.len + 16;
+                    lowcase_key = ngx_pnalloc(r->pool, allocated);
+                    if (lowcase_key == NULL) {
+                        return NGX_ERROR;
+                    }
+                }
+
+                hash = 0;
+
+                for (n = 0; n < header[i].key.len; n++) {
+                    ch = header[i].key.data[n];
+
+                    if (ch >= 'A' && ch <= 'Z') {
+                        ch |= 0x20;
+
+                    } else if (ch == '-') {
+                        ch = '_';
+                    }
+
+                    hash = ngx_hash(hash, ch);
+                    lowcase_key[n] = ch;
+                }
+
+                if (ngx_hash_find(&scf->headers_hash, hash, lowcase_key, n)) {
+                    ignored[header_params++] = &header[i];
+                    continue;
+                }
+            }
+
+            len += sizeof("HTTP_") - 1 + header[i].key.len + 1
+                + header[i].value.len + 1;
+        }
+    }
+
+    /* netstring: "length:" + packet + "," */
+
+    b = ngx_create_temp_buf(r->pool, NGX_SIZE_T_LEN + 1 + len + 1);
+    if (b == NULL) {
+        return NGX_ERROR;
+    }
+
+    cl = ngx_alloc_chain_link(r->pool);
+    if (cl == NULL) {
+        return NGX_ERROR;
+    }
+
+    cl->buf = b;
+
+    b->last = ngx_snprintf(b->last,
+                           NGX_SIZE_T_LEN + 1 + sizeof("CONTENT_LENGTH")
+                           + NGX_OFF_T_LEN + 1,
+                           "%ui:CONTENT_LENGTH%Z%V%Z",
+                           len, content_length);
+
+    if (scf->params_len) {
+        ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
+
+        e.ip = scf->params->elts;
+        e.pos = b->last;
+        e.request = r;
+        e.flushed = 1;
+
+        while (*(uintptr_t *) e.ip) {
+
+#if (NGX_DEBUG)
+            key = e.pos;
+#endif
+            code = *(ngx_http_script_code_pt *) e.ip;
+            code((ngx_http_script_engine_t *) & e);
+
+#if (NGX_DEBUG)
+            val = e.pos;
+#endif
+            while (*(uintptr_t *) e.ip) {
+                code = *(ngx_http_script_code_pt *) e.ip;
+                code((ngx_http_script_engine_t *) &e);
+            }
+            *e.pos++ = '\0';
+            e.ip += sizeof(uintptr_t);
+
+            ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                           "scgi param: \"%s: %s\"", key, val);
+        }
+
+        b->last = e.pos;
+    }
+
+    if (scf->upstream.pass_request_headers) {
+
+        part = &r->headers_in.headers.part;
+        header = part->elts;
+
+        for (i = 0; /* void */; i++) {
+
+            if (i >= part->nelts) {
+                if (part->next == NULL) {
+                    break;
+                }
+
+                part = part->next;
+                header = part->elts;
+                i = 0;
+            }
+
+            for (n = 0; n < header_params; n++) {
+                if (&header[i] == ignored[n]) {
+                    goto next;
+                }
+            }
+
+            key = b->last;
+            b->last = ngx_cpymem(key, "HTTP_", sizeof("HTTP_") - 1);
+
+            for (n = 0; n < header[i].key.len; n++) {
+                ch = header[i].key.data[n];
+
+                if (ch >= 'a' && ch <= 'z') {
+                    ch &= ~0x20;
+
+                } else if (ch == '-') {
+                    ch = '_';
+                }
+
+                *b->last++ = ch;
+            }
+
+            *b->last++ = (u_char) 0;
+
+            val = b->last;
+            b->last = ngx_copy(val, header[i].value.data, header[i].value.len);
+            *b->last++ = (u_char) 0;
+
+            ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                           "scgi param: \"%s: %s\"", key, val);
+
+        next:
+
+            continue;
+         }
+    }
+
+    *b->last++ = (u_char) ',';
+
+    if (scf->upstream.pass_request_body) {
+        body = r->upstream->request_bufs;
+        r->upstream->request_bufs = cl;
+
+        while (body) {
+            b = ngx_alloc_buf(r->pool);
+            if (b == NULL) {
+                return NGX_ERROR;
+            }
+
+            ngx_memcpy(b, body->buf, sizeof(ngx_buf_t));
+
+            cl->next = ngx_alloc_chain_link(r->pool);
+            if (cl->next == NULL) {
+                return NGX_ERROR;
+            }
+
+            cl = cl->next;
+            cl->buf = b;
+
+            body = body->next;
+        }
+
+    } else {
+        r->upstream->request_bufs = cl;
+    }
+
+    cl->next = NULL;
+
+    return NGX_OK;
+}
+
+
+static ngx_int_t
+ngx_http_scgi_reinit_request(ngx_http_request_t *r)
+{
+    ngx_http_status_t  *status;
+
+    status = ngx_http_get_module_ctx(r, ngx_http_scgi_module);
+
+    if (status == NULL) {
+        return NGX_OK;
+    }
+
+    status->code = 0;
+    status->count = 0;
+    status->start = NULL;
+    status->end = NULL;
+
+    r->upstream->process_header = ngx_http_scgi_process_status_line;
+
+    return NGX_OK;
+}
+
+
+static ngx_int_t
+ngx_http_scgi_process_status_line(ngx_http_request_t *r)
+{
+    size_t                len;
+    ngx_int_t             rc;
+    ngx_http_status_t    *status;
+    ngx_http_upstream_t  *u;
+
+    status = ngx_http_get_module_ctx(r, ngx_http_scgi_module);
+
+    if (status == NULL) {
+        return NGX_ERROR;
+    }
+
+    u = r->upstream;
+
+    rc = ngx_http_parse_status_line(r, &u->buffer, status);
+
+    if (rc == NGX_AGAIN) {
+        return rc;
+    }
+
+    if (rc == NGX_ERROR) {
+
+        r->http_version = NGX_HTTP_VERSION_9;
+
+        u->process_header = ngx_http_scgi_process_header;
+
+        return ngx_http_scgi_process_header(r);
+    }
+
+    if (u->state) {
+        u->state->status = status->code;
+    }
+
+    u->headers_in.status_n = status->code;
+
+    len = status->end - status->start;
+    u->headers_in.status_line.len = len;
+
+    u->headers_in.status_line.data = ngx_pnalloc(r->pool, len);
+    if (u->headers_in.status_line.data == NULL) {
+        return NGX_ERROR;
+    }
+
+    ngx_memcpy(u->headers_in.status_line.data, status->start, len);
+
+    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                   "http scgi status %ui \"%V\"",
+                   u->headers_in.status_n, &u->headers_in.status_line);
+
+    u->process_header = ngx_http_scgi_process_header;
+
+    return ngx_http_scgi_process_header(r);
+}
+
+
+static ngx_int_t
+ngx_http_scgi_process_header(ngx_http_request_t *r)
+{
+    ngx_str_t                      *status_line;
+    ngx_int_t                       rc, status;
+    ngx_table_elt_t                *h;
+    ngx_http_upstream_t            *u;
+    ngx_http_upstream_header_t     *hh;
+    ngx_http_upstream_main_conf_t  *umcf;
+
+    umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
+
+    for ( ;; ) {
+
+        rc = ngx_http_parse_header_line(r, &r->upstream->buffer, 1);
+
+        if (rc == NGX_OK) {
+
+            /* a header line has been parsed successfully */
+
+            h = ngx_list_push(&r->upstream->headers_in.headers);
+            if (h == NULL) {
+                return NGX_ERROR;
+            }
+
+            h->hash = r->header_hash;
+
+            h->key.len = r->header_name_end - r->header_name_start;
+            h->value.len = r->header_end - r->header_start;
+
+            h->key.data = ngx_pnalloc(r->pool,
+                                      h->key.len + 1 + h->value.len + 1
+                                      + h->key.len);
+            if (h->key.data == NULL) {
+                return NGX_ERROR;
+            }
+
+            h->value.data = h->key.data + h->key.len + 1;
+            h->lowcase_key = h->key.data + h->key.len + 1 + h->value.len + 1;
+
+            ngx_cpystrn(h->key.data, r->header_name_start, h->key.len + 1);
+            ngx_cpystrn(h->value.data, r->header_start, h->value.len + 1);
+
+            if (h->key.len == r->lowcase_index) {
+                ngx_memcpy(h->lowcase_key, r->lowcase_header, h->key.len);
+
+            } else {
+                ngx_strlow(h->lowcase_key, h->key.data, h->key.len);
+            }
+
+            hh = ngx_hash_find(&umcf->headers_in_hash, h->hash,
+                               h->lowcase_key, h->key.len);
+
+            if (hh && hh->handler(r, h, hh->offset) != NGX_OK) {
+                return NGX_ERROR;
+            }
+
+            ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                           "http scgi header: \"%V: %V\"", &h->key, &h->value);
+
+            continue;
+        }
+
+        if (rc == NGX_HTTP_PARSE_HEADER_DONE) {
+
+            /* a whole header has been parsed successfully */
+
+            ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                           "http scgi header done");
+
+            if (r->http_version > NGX_HTTP_VERSION_9) {
+                return NGX_OK;
+            }
+
+            u = r->upstream;
+
+            if (u->headers_in.status) {
+                status_line = &u->headers_in.status->value;
+
+                status = ngx_atoi(status_line->data, 3);
+                if (status == NGX_ERROR) {
+                    ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+                                  "upstream sent invalid status \"%V\"",
+                                  status_line);
+                    return NGX_HTTP_UPSTREAM_INVALID_HEADER;
+                }
+
+                r->http_version = NGX_HTTP_VERSION_10;
+                u->headers_in.status_n = status;
+                u->headers_in.status_line = *status_line;
+
+            } else if (u->headers_in.location) {
+                r->http_version = NGX_HTTP_VERSION_10;
+                u->headers_in.status_n = 302;
+                ngx_str_set(&u->headers_in.status_line,
+                            "302 Moved Temporarily");
+
+            } else {
+                ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+                              "upstream sent neither valid HTTP/1.0 header "
+                              "nor \"Status\" header line");
+                u->headers_in.status_n = 200;
+                ngx_str_set(&u->headers_in.status_line, "200 OK");
+            }
+
+            if (u->state) {
+                u->state->status = u->headers_in.status_n;
+            }
+
+            return NGX_OK;
+        }
+
+        if (rc == NGX_AGAIN) {
+            return NGX_AGAIN;
+        }
+
+        /* there was error while a header line parsing */
+
+        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+                      "upstream sent invalid header");
+
+        return NGX_HTTP_UPSTREAM_INVALID_HEADER;
+    }
+}
+
+
+static void
+ngx_http_scgi_abort_request(ngx_http_request_t *r)
+{
+    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                   "abort http scgi request");
+
+    return;
+}
+
+
+static void
+ngx_http_scgi_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
+{
+    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                   "finalize http scgi request");
+
+    return;
+}
+
+
+static void *
+ngx_http_scgi_create_loc_conf(ngx_conf_t *cf)
+{
+    ngx_http_scgi_loc_conf_t  *conf;
+
+    conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_scgi_loc_conf_t));
+    if (conf == NULL) {
+        return NULL;
+    }
+
+    conf->upstream.store = NGX_CONF_UNSET;
+    conf->upstream.store_access = NGX_CONF_UNSET_UINT;
+    conf->upstream.buffering = NGX_CONF_UNSET;
+    conf->upstream.ignore_client_abort = NGX_CONF_UNSET;
+
+    conf->upstream.connect_timeout = NGX_CONF_UNSET_MSEC;
+    conf->upstream.send_timeout = NGX_CONF_UNSET_MSEC;
+    conf->upstream.read_timeout = NGX_CONF_UNSET_MSEC;
+
+    conf->upstream.send_lowat = NGX_CONF_UNSET_SIZE;
+    conf->upstream.buffer_size = NGX_CONF_UNSET_SIZE;
+
+    conf->upstream.busy_buffers_size_conf = NGX_CONF_UNSET_SIZE;
+    conf->upstream.max_temp_file_size_conf = NGX_CONF_UNSET_SIZE;
+    conf->upstream.temp_file_write_size_conf = NGX_CONF_UNSET_SIZE;
+
+    conf->upstream.pass_request_headers = NGX_CONF_UNSET;
+    conf->upstream.pass_request_body = NGX_CONF_UNSET;
+
+#if (NGX_HTTP_CACHE)
+    conf->upstream.cache = NGX_CONF_UNSET_PTR;
+    conf->upstream.cache_min_uses = NGX_CONF_UNSET_UINT;
+    conf->upstream.cache_bypass = NGX_CONF_UNSET_PTR;
+    conf->upstream.no_cache = NGX_CONF_UNSET_PTR;
+    conf->upstream.cache_valid = NGX_CONF_UNSET_PTR;
+#endif
+
+    conf->upstream.hide_headers = NGX_CONF_UNSET_PTR;
+    conf->upstream.pass_headers = NGX_CONF_UNSET_PTR;
+
+    conf->upstream.intercept_errors = NGX_CONF_UNSET;
+
+    /* "scgi_cyclic_temp_file" is disabled */
+    conf->upstream.cyclic_temp_file = 0;
+
+    ngx_str_set(&conf->upstream.module, "scgi");
+
+    return conf;
+}
+
+
+static char *
+ngx_http_scgi_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
+{
+    ngx_http_scgi_loc_conf_t *prev = parent;
+    ngx_http_scgi_loc_conf_t *conf = child;
+
+    u_char                       *p;
+    size_t                        size;
+    uintptr_t                    *code;
+    ngx_uint_t                    i;
+    ngx_array_t                   headers_names;
+    ngx_keyval_t                 *src;
+    ngx_hash_key_t               *hk;
+    ngx_hash_init_t               hash;
+    ngx_http_core_loc_conf_t     *clcf;
+    ngx_http_script_compile_t     sc;
+    ngx_http_script_copy_code_t  *copy;
+
+    if (conf->upstream.store != 0) {
+        ngx_conf_merge_value(conf->upstream.store, prev->upstream.store, 0);
+
+        if (conf->upstream.store_lengths == NULL) {
+            conf->upstream.store_lengths = prev->upstream.store_lengths;
+            conf->upstream.store_values = prev->upstream.store_values;
+        }
+    }
+
+    ngx_conf_merge_uint_value(conf->upstream.store_access,
+                              prev->upstream.store_access, 0600);
+
+    ngx_conf_merge_value(conf->upstream.buffering,
+                              prev->upstream.buffering, 1);
+
+    ngx_conf_merge_value(conf->upstream.ignore_client_abort,
+                              prev->upstream.ignore_client_abort, 0);
+
+    ngx_conf_merge_msec_value(conf->upstream.connect_timeout,
+                              prev->upstream.connect_timeout, 60000);
+
+    ngx_conf_merge_msec_value(conf->upstream.send_timeout,
+                              prev->upstream.send_timeout, 60000);
+
+    ngx_conf_merge_msec_value(conf->upstream.read_timeout,
+                              prev->upstream.read_timeout, 60000);
+
+    ngx_conf_merge_size_value(conf->upstream.send_lowat,
+                              prev->upstream.send_lowat, 0);
+
+    ngx_conf_merge_size_value(conf->upstream.buffer_size,
+                              prev->upstream.buffer_size,
+                              (size_t) ngx_pagesize);
+
+
+    ngx_conf_merge_bufs_value(conf->upstream.bufs, prev->upstream.bufs,
+                              8, ngx_pagesize);
+
+    if (conf->upstream.bufs.num < 2) {
+        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                           "there must be at least 2 \"scgi_buffers\"");
+        return NGX_CONF_ERROR;
+    }
+
+
+    size = conf->upstream.buffer_size;
+    if (size < conf->upstream.bufs.size) {
+        size = conf->upstream.bufs.size;
+    }
+
+
+    ngx_conf_merge_size_value(conf->upstream.busy_buffers_size_conf,
+                              prev->upstream.busy_buffers_size_conf,
+                              NGX_CONF_UNSET_SIZE);
+
+    if (conf->upstream.busy_buffers_size_conf == NGX_CONF_UNSET_SIZE) {
+        conf->upstream.busy_buffers_size = 2 * size;
+    } else {
+        conf->upstream.busy_buffers_size =
+            conf->upstream.busy_buffers_size_conf;
+    }
+
+    if (conf->upstream.busy_buffers_size < size) {
+        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+            "\"scgi_busy_buffers_size\" must be equal or bigger "
+            "than maximum of the value of \"scgi_buffer_size\" and "
+            "one of the \"scgi_buffers\"");
+
+        return NGX_CONF_ERROR;
+    }
+
+    if (conf->upstream.busy_buffers_size
+        > (conf->upstream.bufs.num - 1) * conf->upstream.bufs.size)
+    {
+        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+            "\"scgi_busy_buffers_size\" must be less than "
+            "the size of all \"scgi_buffers\" minus one buffer");
+
+        return NGX_CONF_ERROR;
+    }
+
+
+    ngx_conf_merge_size_value(conf->upstream.temp_file_write_size_conf,
+                              prev->upstream.temp_file_write_size_conf,
+                              NGX_CONF_UNSET_SIZE);
+
+    if (conf->upstream.temp_file_write_size_conf == NGX_CONF_UNSET_SIZE) {
+        conf->upstream.temp_file_write_size = 2 * size;
+    } else {
+        conf->upstream.temp_file_write_size =
+            conf->upstream.temp_file_write_size_conf;
+    }
+
+    if (conf->upstream.temp_file_write_size < size) {
+        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+            "\"scgi_temp_file_write_size\" must be equal or bigger than "
+            "maximum of the value of \"scgi_buffer_size\" and "
+            "one of the \"scgi_buffers\"");
+
+        return NGX_CONF_ERROR;
+    }
+
+
+    ngx_conf_merge_size_value(conf->upstream.max_temp_file_size_conf,
+                              prev->upstream.max_temp_file_size_conf,
+                              NGX_CONF_UNSET_SIZE);
+
+    if (conf->upstream.max_temp_file_size_conf == NGX_CONF_UNSET_SIZE) {
+        conf->upstream.max_temp_file_size = 1024 * 1024 * 1024;
+    } else {
+        conf->upstream.max_temp_file_size =
+            conf->upstream.max_temp_file_size_conf;
+    }
+
+    if (conf->upstream.max_temp_file_size != 0
+        && conf->upstream.max_temp_file_size < size) {
+        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+            "\"scgi_max_temp_file_size\" must be equal to zero to disable "
+            "the temporary files usage or must be equal or bigger than "
+            "maximum of the value of \"scgi_buffer_size\" and "
+            "one of the \"scgi_buffers\"");
+
+        return NGX_CONF_ERROR;
+    }
+
+
+    ngx_conf_merge_bitmask_value(conf->upstream.ignore_headers,
+                                 prev->upstream.ignore_headers,
+                                 NGX_CONF_BITMASK_SET);
+
+
+    ngx_conf_merge_bitmask_value(conf->upstream.next_upstream,
+                                 prev->upstream.next_upstream,
+                                 (NGX_CONF_BITMASK_SET
+                                  |NGX_HTTP_UPSTREAM_FT_ERROR
+                                  |NGX_HTTP_UPSTREAM_FT_TIMEOUT));
+
+    if (conf->upstream.next_upstream & NGX_HTTP_UPSTREAM_FT_OFF) {
+        conf->upstream.next_upstream = NGX_CONF_BITMASK_SET
+                                       |NGX_HTTP_UPSTREAM_FT_OFF;
+    }
+
+    if (ngx_conf_merge_path_value(cf, &conf->upstream.temp_path,
+                                  prev->upstream.temp_path,
+                                  &ngx_http_scgi_temp_path)
+        != NGX_OK)
+    {
+        return NGX_CONF_ERROR;
+    }
+
+#if (NGX_HTTP_CACHE)
+
+    ngx_conf_merge_ptr_value(conf->upstream.cache,
+                              prev->upstream.cache, NULL);
+
+    if (conf->upstream.cache && conf->upstream.cache->data == NULL) {
+        ngx_shm_zone_t  *shm_zone;
+
+        shm_zone = conf->upstream.cache;
+
+        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                           "\"scgi_cache\" zone \"%V\" is unknown",
+                           &shm_zone->shm.name);
+
+        return NGX_CONF_ERROR;
+    }
+
+    ngx_conf_merge_uint_value(conf->upstream.cache_min_uses,
+                              prev->upstream.cache_min_uses, 1);
+
+    ngx_conf_merge_bitmask_value(conf->upstream.cache_use_stale,
+                              prev->upstream.cache_use_stale,
+                              (NGX_CONF_BITMASK_SET
+                               |NGX_HTTP_UPSTREAM_FT_OFF));
+
+    if (conf->upstream.cache_use_stale & NGX_HTTP_UPSTREAM_FT_OFF) {
+        conf->upstream.cache_use_stale = NGX_CONF_BITMASK_SET
+                                         |NGX_HTTP_UPSTREAM_FT_OFF;
+    }
+
+    if (conf->upstream.cache_methods == 0) {
+        conf->upstream.cache_methods = prev->upstream.cache_methods;
+    }
+
+    conf->upstream.cache_methods |= NGX_HTTP_GET|NGX_HTTP_HEAD;
+
+    ngx_conf_merge_ptr_value(conf->upstream.cache_bypass,
+                             prev->upstream.cache_bypass, NULL);
+
+    ngx_conf_merge_ptr_value(conf->upstream.no_cache,
+                             prev->upstream.no_cache, NULL);
+
+    ngx_conf_merge_ptr_value(conf->upstream.cache_valid,
+                             prev->upstream.cache_valid, NULL);
+
+    if (conf->cache_key.value.data == NULL) {
+        conf->cache_key = prev->cache_key;
+    }
+
+#endif
+
+    ngx_conf_merge_value(conf->upstream.pass_request_headers,
+                         prev->upstream.pass_request_headers, 1);
+    ngx_conf_merge_value(conf->upstream.pass_request_body,
+                         prev->upstream.pass_request_body, 1);
+
+    ngx_conf_merge_value(conf->upstream.intercept_errors,
+                         prev->upstream.intercept_errors, 0);
+
+    hash.max_size = 512;
+    hash.bucket_size = ngx_align(64, ngx_cacheline_size);
+    hash.name = "scgi_hide_headers_hash";
+
+    if (ngx_http_upstream_hide_headers_hash(cf, &conf->upstream,
+            &prev->upstream, ngx_http_scgi_hide_headers, &hash)
+        != NGX_OK)
+    {
+        return NGX_CONF_ERROR;
+    }
+
+    if (conf->upstream.upstream == NULL) {
+        conf->upstream.upstream = prev->upstream.upstream;
+    }
+
+    if (conf->scgi_lengths == NULL) {
+        conf->scgi_lengths = prev->scgi_lengths;
+        conf->scgi_values = prev->scgi_values;
+    }
+
+    if (conf->upstream.upstream || conf->scgi_lengths) {
+        clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
+        if (clcf->handler == NULL && clcf->lmt_excpt) {
+            clcf->handler = ngx_http_scgi_handler;
+        }
+    }
+
+    if (conf->params_source == NULL) {
+        conf->flushes = prev->flushes;
+        conf->params_len = prev->params_len;
+        conf->params = prev->params;
+        conf->params_source = prev->params_source;
+        conf->headers_hash = prev->headers_hash;
+
+#if (NGX_HTTP_CACHE)
+
+        if (conf->params_source == NULL) {
+
+            if ((conf->upstream.cache == NULL)
+                == (prev->upstream.cache == NULL))
+            {
+                return NGX_CONF_OK;
+            }
+
+            /* 6 is a number of ngx_http_scgi_cache_headers entries */
+            conf->params_source = ngx_array_create(cf->pool, 6,
+                                                   sizeof(ngx_keyval_t));
+            if (conf->params_source == NULL) {
+                return NGX_CONF_ERROR;
+            }
+        }
+#else
+
+        if (conf->params_source == NULL) {
+            return NGX_CONF_OK;
+        }
+
+#endif
+    }
+
+    conf->params_len = ngx_array_create(cf->pool, 64, 1);
+    if (conf->params_len == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    conf->params = ngx_array_create(cf->pool, 512, 1);
+    if (conf->params == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    if (ngx_array_init(&headers_names, cf->temp_pool, 4, sizeof(ngx_hash_key_t))
+        != NGX_OK)
+    {
+        return NGX_CONF_ERROR;
+    }
+
+    src = conf->params_source->elts;
+
+#if (NGX_HTTP_CACHE)
+
+    if (conf->upstream.cache) {
+        ngx_keyval_t  *h, *s;
+
+        for (h = ngx_http_scgi_cache_headers; h->key.len; h++) {
+
+            for (i = 0; i < conf->params_source->nelts; i++) {
+                if (ngx_strcasecmp(h->key.data, src[i].key.data) == 0) {
+                    goto next;
+                }
+            }
+
+            s = ngx_array_push(conf->params_source);
+            if (s == NULL) {
+                return NGX_CONF_ERROR;
+            }
+
+            *s = *h;
+
+            src = conf->params_source->elts;
+
+        next:
+
+            h++;
+        }
+    }
+
+#endif
+
+    for (i = 0; i < conf->params_source->nelts; i++) {
+
+        if (src[i].key.len > sizeof("HTTP_") - 1
+            && ngx_strncmp(src[i].key.data, "HTTP_", sizeof("HTTP_") - 1) == 0)
+        {
+            hk = ngx_array_push(&headers_names);
+            if (hk == NULL) {
+                return NGX_CONF_ERROR;
+            }
+
+            hk->key.len = src[i].key.len - 5;
+            hk->key.data = src[i].key.data + 5;
+            hk->key_hash = ngx_hash_key_lc(hk->key.data, hk->key.len);
+            hk->value = (void *) 1;
+
+            if (src[i].value.len == 0) {
+                continue;
+            }
+        }
+
+        copy = ngx_array_push_n(conf->params_len,
+                                sizeof(ngx_http_script_copy_code_t));
+        if (copy == NULL) {
+            return NGX_CONF_ERROR;
+        }
+
+        copy->code = (ngx_http_script_code_pt) ngx_http_script_copy_len_code;
+        copy->len = src[i].key.len + 1;
+
+
+        size = (sizeof(ngx_http_script_copy_code_t)
+                + src[i].key.len + 1 + sizeof(uintptr_t) - 1)
+               & ~(sizeof(uintptr_t) - 1);
+
+        copy = ngx_array_push_n(conf->params, size);
+        if (copy == NULL) {
+            return NGX_CONF_ERROR;
+        }
+
+        copy->code = ngx_http_script_copy_code;
+        copy->len = src[i].key.len + 1;
+
+        p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t);
+        (void) ngx_cpystrn(p, src[i].key.data, src[i].key.len + 1);
+
+
+        ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
+
+        sc.cf = cf;
+        sc.source = &src[i].value;
+        sc.flushes = &conf->flushes;
+        sc.lengths = &conf->params_len;
+        sc.values = &conf->params;
+
+        if (ngx_http_script_compile(&sc) != NGX_OK) {
+            return NGX_CONF_ERROR;
+        }
+
+        code = ngx_array_push_n(conf->params_len, sizeof(uintptr_t));
+        if (code == NULL) {
+            return NGX_CONF_ERROR;
+        }
+
+        *code = (uintptr_t) NULL;
+
+
+        code = ngx_array_push_n(conf->params, sizeof(uintptr_t));
+        if (code == NULL) {
+            return NGX_CONF_ERROR;
+        }
+
+        *code = (uintptr_t) NULL;
+    }
+
+    code = ngx_array_push_n(conf->params_len, sizeof(uintptr_t));
+    if (code == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    *code = (uintptr_t) NULL;
+
+    code = ngx_array_push_n(conf->params, sizeof(uintptr_t));
+    if (code == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    *code = (uintptr_t) NULL;
+
+    conf->header_params = headers_names.nelts;
+
+    hash.hash = &conf->headers_hash;
+    hash.key = ngx_hash_key_lc;
+    hash.max_size = 512;
+    hash.bucket_size = 64;
+    hash.name = "scgi_params_hash";
+    hash.pool = cf->pool;
+    hash.temp_pool = NULL;
+
+    if (ngx_hash_init(&hash, headers_names.elts, headers_names.nelts) != NGX_OK)
+    {
+        return NGX_CONF_ERROR;
+    }
+
+    return NGX_CONF_OK;
+}
+
+
+static char *
+ngx_http_scgi_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+    ngx_http_scgi_loc_conf_t *scf = conf;
+
+    ngx_url_t                   u;
+    ngx_str_t                  *value, *url;
+    ngx_uint_t                  n;
+    ngx_http_core_loc_conf_t   *clcf;
+    ngx_http_script_compile_t   sc;
+
+    if (scf->upstream.upstream || scf->scgi_lengths) {
+        return "is duplicate";
+    }
+
+    clcf = ngx_http_conf_get_module_loc_conf (cf, ngx_http_core_module);
+    clcf->handler = ngx_http_scgi_handler;
+
+    value = cf->args->elts;
+
+    url = &value[1];
+
+    n = ngx_http_script_variables_count(url);
+
+    if (n) {
+
+        ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
+
+        sc.cf = cf;
+        sc.source = url;
+        sc.lengths = &scf->scgi_lengths;
+        sc.values = &scf->scgi_values;
+        sc.variables = n;
+        sc.complete_lengths = 1;
+        sc.complete_values = 1;
+
+        if (ngx_http_script_compile(&sc) != NGX_OK) {
+            return NGX_CONF_ERROR;
+        }
+
+        return NGX_CONF_OK;
+    }
+
+    ngx_memzero(&u, sizeof(ngx_url_t));
+
+    u.url = value[1];
+    u.no_resolve = 1;
+
+    scf->upstream.upstream = ngx_http_upstream_add(cf, &u, 0);
+    if (scf->upstream.upstream == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    if (clcf->name.data[clcf->name.len - 1] == '/') {
+        clcf->auto_redirect = 1;
+    }
+
+    return NGX_CONF_OK;
+}
+
+
+static char *
+ngx_http_scgi_store(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+    ngx_http_scgi_loc_conf_t *scf = conf;
+
+    ngx_str_t                  *value;
+    ngx_http_script_compile_t   sc;
+
+    if (scf->upstream.store != NGX_CONF_UNSET || scf->upstream.store_lengths) {
+        return "is duplicate";
+    }
+
+    value = cf->args->elts;
+
+    if (ngx_strcmp(value[1].data, "off") == 0) {
+        scf->upstream.store = 0;
+        return NGX_CONF_OK;
+    }
+
+#if (NGX_HTTP_CACHE)
+
+    if (scf->upstream.cache != NGX_CONF_UNSET_PTR
+        && scf->upstream.cache != NULL)
+    {
+        return "is incompatible with \"scgi_cache\"";
+    }
+
+#endif
+
+    if (ngx_strcmp(value[1].data, "on") == 0) {
+        scf->upstream.store = 1;
+        return NGX_CONF_OK;
+    }
+
+    /* include the terminating '\0' into script */
+    value[1].len++;
+
+    ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
+
+    sc.cf = cf;
+    sc.source = &value[1];
+    sc.lengths = &scf->upstream.store_lengths;
+    sc.values = &scf->upstream.store_values;
+    sc.variables = ngx_http_script_variables_count(&value[1]);;
+    sc.complete_lengths = 1;
+    sc.complete_values = 1;
+
+    if (ngx_http_script_compile(&sc) != NGX_OK) {
+        return NGX_CONF_ERROR;
+    }
+
+    return NGX_CONF_OK;
+}
+
+
+#if (NGX_HTTP_CACHE)
+
+static char *
+ngx_http_scgi_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+    ngx_http_scgi_loc_conf_t *scf = conf;
+
+    ngx_str_t  *value;
+
+    value = cf->args->elts;
+
+    if (scf->upstream.cache != NGX_CONF_UNSET_PTR) {
+        return "is duplicate";
+    }
+
+    if (ngx_strcmp(value[1].data, "off") == 0) {
+        scf->upstream.cache = NULL;
+        return NGX_CONF_OK;
+    }
+
+    if (scf->upstream.store > 0 || scf->upstream.store_lengths) {
+        return "is incompatible with \"scgi_store\"";
+    }
+
+    scf->upstream.cache = ngx_shared_memory_add(cf, &value[1], 0,
+                                                &ngx_http_scgi_module);
+    if (scf->upstream.cache == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    return NGX_CONF_OK;
+}
+
+
+static char *
+ngx_http_scgi_cache_key(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+    ngx_http_scgi_loc_conf_t *scf = conf;
+
+    ngx_str_t                         *value;
+    ngx_http_compile_complex_value_t   ccv;
+
+    value = cf->args->elts;
+
+    if (scf->cache_key.value.len) {
+        return "is duplicate";
+    }
+
+    ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
+
+    ccv.cf = cf;
+    ccv.value = &value[1];
+    ccv.complex_value = &scf->cache_key;
+
+    if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
+        return NGX_CONF_ERROR;
+    }
+
+    return NGX_CONF_OK;
+}
+
+#endif