new file mode 100644
--- /dev/null
+++ b/src/core/ngx_file.c
@@ -0,0 +1,140 @@
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_hunk.h>
+#include <ngx_array.h>
+#include <ngx_file.h>
+#include <ngx_files.h>
+
+
+int ngx_create_temp_file(ngx_file_t *file, ngx_path_t *path,
+                         ngx_pool_t *pool, int num, int step, int persistent)
+{
+    int        i;
+    ngx_err_t  err;
+
+    file->name.len = path->name.len + 1 + path->len + 10;
+
+    ngx_test_null(file->name.data, ngx_palloc(pool, file->name.len + 1),
+                  NGX_ERROR);
+
+#if 0
+    for (i = 0; i < file->name.len; i++) {
+         file->name.data[i] = 'X';
+    }
+#endif
+
+    ngx_memcpy(file->name.data, path->name.data, path->name.len);
+
+    for ( ;; ) {
+        snprintf(file->name.data + path->name.len + 1 + path->len, 11,
+                 "%010d", num);
+
+        ngx_create_hashed_filename(file, path);
+
+#if 0
+#if (WIN32)
+        file->fd = CreateFile(file->name.data,
+                        GENERIC_READ|GENERIC_WRITE,
+                        FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
+                        NULL,
+                        CREATE_NEW,
+                        persistent ? 0:
+                            FILE_ATTRIBUTE_TEMPORARY|FILE_FLAG_DELETE_ON_CLOSE,
+                        NULL);
+#else
+        file->fd = open(file->name.data, O_CREAT|O_EXCL|O_WRONLY, 0600);
+#endif
+#endif
+
+        file->fd = ngx_open_tempfile(file->name.data, persistent);
+
+        if (file->fd != NGX_INVALID_FILE) {
+            return NGX_OK;
+        }
+
+        err = ngx_errno;
+
+        if (err == NGX_EEXIST) {
+            num *= step;
+            continue;
+        }
+
+        if (err != NGX_ENOENT
+#if (WIN32_NEED_TEST)
+            && err != NGX_ENOTDIR
+#endif
+        ) {
+            ngx_log_error(NGX_LOG_CRIT, file->log, err,
+                          ngx_open_tempfile_n " \"%s\" failed",
+                          file->name.data);
+            return NGX_ERROR;
+        }
+
+        if (ngx_create_path(file, path) == NGX_ERROR) {
+            return NGX_ERROR;
+        }        
+    }
+}
+
+
+void ngx_create_hashed_filename(ngx_file_t *file, ngx_path_t *path)
+{
+    int        i, name, pos, level;
+
+    name = file->name.len;
+    pos = path->name.len + 1;
+
+    file->name.data[path->name.len + path->len]  = '/';
+
+    for (i = 0; i < 3; i++) {
+        level = path->level[i];
+
+        if (level == 0) {
+            break;
+        }
+
+        ngx_log_debug(file->log, "temp: %s" _ file->name.data);
+
+        name -= level;
+        file->name.data[pos - 1] = '/';
+        ngx_memcpy(&file->name.data[pos], &file->name.data[name], level);
+        pos += level + 1;
+    }
+
+    ngx_log_debug(file->log, "temp: %s" _ file->name.data);
+}
+
+
+int ngx_create_path(ngx_file_t *file, ngx_path_t *path)
+{
+    int        i, pos;
+    ngx_err_t  err;
+
+    pos = path->name.len;
+
+    for (i = 0; i < 3; i++) {
+        if (path->level[i] == 0) {
+            break;
+        }
+
+        pos += path->level[i] + 1;
+
+        file->name.data[pos] = '\0';
+
+        ngx_log_debug(file->log, "temp: %s" _ file->name.data);
+
+        if (ngx_mkdir(file->name.data) == NGX_FILE_ERROR) {
+            err = ngx_errno;
+            if (err != NGX_EEXIST) {
+                ngx_log_error(NGX_LOG_CRIT, file->log, err,
+                              ngx_mkdir_n " \"%s\" failed", file->name.data);
+                return NGX_ERROR;
+            }
+        }
+
+        file->name.data[pos] = '/';
+    }
+
+    return NGX_OK;
+}

--- a/src/core/ngx_file.h
+++ b/src/core/ngx_file.h
@@ -4,6 +4,7 @@
 
 #include <ngx_file.h>
 #include <ngx_log.h>
+#include <ngx_alloc.h>
 #include <ngx_string.h>
 
 typedef struct ngx_file_s  ngx_file_t;
@@ -21,4 +22,18 @@ struct ngx_file_s {
 };
 
 
+typedef struct {
+    ngx_str_t  name;
+    int        len;
+    int        level[3];
+} ngx_path_t;
+
+
+int ngx_create_temp_file(ngx_file_t *file, ngx_path_t *path,
+                         ngx_pool_t *pool, int num, int step, int persistent);
+void ngx_create_hashed_filename(ngx_file_t *file, ngx_path_t *path);
+int ngx_create_path(ngx_file_t *file, ngx_path_t *path);
+
+
+
 #endif /* _NGX_FILE_H_INCLUDED_ */

--- a/src/core/ngx_hunk.h
+++ b/src/core/ngx_hunk.h
@@ -34,20 +34,8 @@
 
 
 
-
 typedef struct ngx_hunk_s ngx_hunk_t;
 struct ngx_hunk_s {
-#if 0
-    union {
-        char    *mem;           /* start of current data */
-        off_t    file;   
-    } pos;
-    union {
-        char    *mem;           /* end of current data */
-        off_t    file;   
-    } last;
-#endif
-
     char        *pos;
     char        *last;
     off_t        file_pos;
@@ -60,10 +48,10 @@ struct ngx_hunk_s {
     char        *post_end;      /* end of post-allocated hunk */
     int          tag;
     ngx_file_t  *file;
+    ngx_hunk_t  *shadow;
 };
 
 
-
 typedef struct ngx_chain_s  ngx_chain_t;
 struct ngx_chain_s {
     ngx_hunk_t  *hunk;

--- a/src/http/modules/ngx_http_index_handler.c
+++ b/src/http/modules/ngx_http_index_handler.c
@@ -58,8 +58,9 @@ ngx_module_t  ngx_http_index_module = {
    Try to open first index file before the test of the directory existence
    because the valid requests should be many more then invalid ones.
    If open() failed then stat() should be more quickly because some data
-   is already cached in the kernel.  Besides Win32 has ERROR_PATH_NOT_FOUND
-   and Unix has ENOTDIR error (although it less helpfull).
+   is already cached in the kernel.
+   Besides Win32 has ERROR_PATH_NOT_FOUND (NGX_ENOTDIR) and
+   Unix has ENOTDIR error (although it less helpfull).
 */
 
 int ngx_http_index_handler(ngx_http_request_t *r)
@@ -110,11 +111,7 @@ int ngx_http_index_handler(ngx_http_requ
 ngx_log_error(NGX_LOG_DEBUG, r->connection->log, err,
               "DEBUG: " ngx_open_file_n " %s failed", name);
 
-#if (WIN32)
-            if (err == ERROR_PATH_NOT_FOUND) {
-#else
             if (err == NGX_ENOTDIR) {
-#endif
                 r->path_not_found = 1;
 
             } else if (err == NGX_EACCES) {

--- a/src/http/modules/ngx_http_static_handler.c
+++ b/src/http/modules/ngx_http_static_handler.c
@@ -40,14 +40,15 @@ int ngx_http_static_handler(ngx_http_req
                       "ngx_http_static_handler: "
                       ngx_open_file_n " %s failed", r->file.name.data);
 
-        if (err == NGX_ENOENT)
+        if (err == NGX_ENOENT) {
+            return NGX_HTTP_NOT_FOUND;
+
+        } else if (err == NGX_ENOTDIR) {
             return NGX_HTTP_NOT_FOUND;
-#if (WIN32)
-        else if (err == ERROR_PATH_NOT_FOUND)
-            return NGX_HTTP_NOT_FOUND;
-#endif
-        else
+
+        } else {
             return NGX_HTTP_INTERNAL_SERVER_ERROR;
+        }
     }
 
     if (!r->file.info_valid) {

--- a/src/http/modules/proxy/ngx_http_event_proxy_handler.c
+++ b/src/http/modules/proxy/ngx_http_event_proxy_handler.c
@@ -31,6 +31,9 @@ static int ngx_http_proxy_process_upstre
 static int ngx_http_proxy_process_upstream_header_line(ngx_http_proxy_ctx_t *p);
 
 
+static int ngx_http_proxy_write_upstream_body(ngx_event_t *wev);
+
+
 static int ngx_http_proxy_read_response_body(ngx_event_t *ev);
 static int ngx_http_proxy_write_to_client(ngx_event_t *ev);
 
@@ -39,6 +42,7 @@ static int ngx_read_http_proxy_status_li
 static int ngx_http_proxy_finalize_request(ngx_http_proxy_ctx_t *p, int error);
 static size_t ngx_http_proxy_log_error(void *data, char *buf, size_t len);
 
+static int ngx_http_proxy_init(ngx_pool_t *pool);
 static void *ngx_http_proxy_create_loc_conf(ngx_pool_t *pool);
 
 static char *ngx_http_proxy_set_pass(ngx_conf_t *cf, ngx_command_t *cmd,
@@ -82,7 +86,7 @@ ngx_module_t  ngx_http_proxy_module = {
     &ngx_http_proxy_module_ctx,            /* module context */
     ngx_http_proxy_commands,               /* module directives */
     NGX_HTTP_MODULE_TYPE,                  /* module type */
-    NULL                                   /* init module */
+    ngx_http_proxy_init                    /* init module */
 };
 
 
@@ -179,7 +183,7 @@ static int ngx_http_proxy_handler(ngx_ht
     }
 
     /* TODO: duplicate the hunks and chain if there is backend farm */
-    p->out = chain;
+    p->request_hunks = chain;
 
     p->last_error = NGX_HTTP_BAD_GATEWAY;
     ngx_http_proxy_process_upstream(p, NULL);
@@ -679,12 +683,12 @@ static int ngx_http_proxy_send_request(n
     ngx_chain_t  *chain;
     ngx_event_t  *wev;
 
-    chain = ngx_write_chain(p->connection, p->out, 0);
+    chain = ngx_write_chain(p->connection, p->request_hunks, 0);
     if (chain == (ngx_chain_t *) -1) {
         return NGX_ERROR;
     }
 
-    p->out = chain;
+    p->request_hunks = chain;
 
     wev = p->connection->write;
 
@@ -1026,12 +1030,11 @@ static int ngx_http_proxy_process_upstre
 }
 
 
-#if 0
-
 static int ngx_http_proxy_read_upstream_body(ngx_event_t *rev)
 {
+    int                    rc, n, size;
     ngx_hunk_t            *h;
-    ngx_chain_t           *chain, ce;
+    ngx_chain_t           *chain, chain_entry, *ce, *te;
     ngx_connection_t      *c;
     ngx_http_request_t    *r;
     ngx_http_proxy_ctx_t  *p;
@@ -1041,9 +1044,9 @@ static int ngx_http_proxy_read_upstream_
     p = (ngx_http_proxy_ctx_t *)
                          ngx_http_get_module_ctx(r, ngx_http_proxy_module_ctx);
 
-    ce.next = NULL;
+    chain_entry.next = NULL;
 
-    do {
+    for ( ;; ) {
 
 #if (USE_KQUEUE)
 
@@ -1051,7 +1054,7 @@ static int ngx_http_proxy_read_upstream_
             break;
         }
 
-#elif (HAVE_KQUEUE)
+#elif (HAVE_KQUEUE0)
 
         if (ngx_event_type == NGX_HAVE_KQUEUE_EVENT
             && ev->eof && ev->available == 0)
@@ -1063,6 +1066,7 @@ static int ngx_http_proxy_read_upstream_
 
         if (p->free_hunks) {
             chain = p->free_hunks;
+            p->free_hunks = NULL;
 
         } else if (p->allocated < p->lcf->max_block_size) {
             ngx_test_null(h,
@@ -1070,12 +1074,13 @@ static int ngx_http_proxy_read_upstream_
                           NGX_ERROR);
 
             p->allocated += p->block_size;
-            ce.hunk = h;
-            chain = &ce;
+            chain_entry.hunk = h;
+            chain = &chain_entry;
 
         } else {
-            if (p->temp_fd == NGX_INVALID_FILE) {
-                rc = ngx_create_temp_file(p->temp_file, r->cachable);
+            if (p->temp_file->fd == NGX_INVALID_FILE) {
+                rc = ngx_create_temp_file(p->temp_file, p->lcf->temp_path,
+                                          r->pool, 0, 2, r->cachable);
 
                 if (rc != NGX_OK) {
                     return rc;
@@ -1089,70 +1094,169 @@ static int ngx_http_proxy_read_upstream_
             }
 
             n = ngx_write_chain_to_file(p->temp_file, p->in_hunks,
-                                        p->temp_offset);
+                                        p->temp_offset, r->pool);
 
             if (n == NGX_ERROR) {
                 return NGX_ERROR;
             }
 
-            ngx_test_null(h, ngx_pcalloc(r->pool, sizeof(ngx_hunk_t)),
-                          NGX_ERROR);
+            for (ce = p->in_hunks; ce; ce = ce->next) {
+                ngx_test_null(h, ngx_pcalloc(r->pool, sizeof(ngx_hunk_t)),
+                              NGX_ERROR);
 
-            h->type = NGX_HUNK_FILE
-                      |NGX_HUNK_IN_MEMORY|NGX_HUNK_TEMP|NGX_HUNK_RECYCLED;
+                h->type = NGX_HUNK_FILE
+                          |NGX_HUNK_TEMP|NGX_HUNK_IN_MEMORY|NGX_HUNK_RECYCLED;
 
-            h->file_pos = p->temp_offset;
-            p->temp_offset += n;
-            h->file_last = p->temp_offset;
+                ce->hunk->shadow = h;
+                h->shadow = ce->hunk;
 
-            h->file->fd = p->temp_file.fd;
-            h->file->log = p->log;
+                h->file_pos = p->temp_offset;
+                p->temp_offset += ce->hunk->last - ce->hunk->pos;
+                h->file_last = p->temp_offset;
+
+                h->file->fd = p->temp_file->fd;
+                h->file->log = p->log;
 
-            h->pos = p->in_hunks->hunk->pos;
-            h->last = p->in_hunks->hunk->last;
-            h->start = p->in_hunks->hunk->start;
-            h->end = p->in_hunks->hunk->end;
-            h->pre_start = p->in_hunks->hunk->pre_start;
-            h->post_end = p->in_hunks->hunk->post_end;
+                h->pos = ce->hunk->pos;
+                h->last = ce->hunk->last;
+                h->start = ce->hunk->start;
+                h->end = ce->hunk->end;
+                h->pre_start = ce->hunk->pre_start;
+                h->post_end = ce->hunk->post_end;
 
-            ngx_add_hunk_to_chain(p->last_out_hunk, h, r->pool, NGX_ERROR);
+                ngx_test_null(te, ngx_create_chain_entry(r->pool), NGX_ERROR);
+                te->hunk = h;
+                te->next = NULL;
 
-            ce.hunk = p->in_hunks->next;
-            p->in_hunks = p->in_hunks->next;
-            chain = &ce;
+                if (p->last_out_hunk) {
+                    p->last_out_hunk->next = te;
+                    p->last_out_hunk = te;
+
+                } else {
+                    p->last_out_hunk = te;
+                }
+            }
         }
 
         n = ngx_recv_chain(c, chain);
 
-        h->last += n;
-        left = hunk->end - hunk->last;
+        if (n == NGX_ERROR) {
+            return NGX_ERROR;
+        }
+
+        if (n == NGX_AGAIN) {
+            return NGX_AGAIN;
+        }
+
+        if (n == 0) {
+            break;
+        }
+
+        for (ce = chain; ce && n > 0; ce = ce->next) {
+            ngx_test_null(te, ngx_create_chain_entry(r->pool), NGX_ERROR);
+            te->hunk = ce->hunk;
+            te->next = NULL;
+
+            if (p->last_in_hunk) {
+                p->last_in_hunk->next = te;
+                p->last_in_hunk = te;
+
+            } else {
+                p->last_in_hunk = te;
+            }
+
+            size = ce->hunk->end - ce->hunk->last;
 
-    } while (n > 0 && left == 0);
+            if (n >= size) {
+                n -= size;
+                ce->hunk->last = ce->hunk->end;
+                if (ce->hunk->shadow) {
+                    ce->hunk->shadow->type &= ~(NGX_HUNK_TEMP
+                                                |NGX_HUNK_IN_MEMORY
+                                                |NGX_HUNK_RECYCLED);
+                    ce->hunk->shadow->shadow = NULL;
+
+                }
+
+                continue;
+            }
+
+            ce->hunk->last += n;
+            if (ce->hunk->shadow) {
+                ce->hunk->shadow->type &= ~(NGX_HUNK_TEMP
+                                            |NGX_HUNK_IN_MEMORY
+                                            |NGX_HUNK_RECYCLED);
+                ce->hunk->shadow->shadow = NULL;
+            }
+
+            break;
+        }
+
+        if (ce) {
+            ce->next = p->free_hunks;
+            p->free_hunks = ce;
+            break;
+
+            return NGX_OK;
+        }
+    }
 
     if (p->out_hunks && p->request->connection->write->ready) {
-        ngx_http_proxy_write_upstream_body(p->request->connection->write);
+        return
+             ngx_http_proxy_write_upstream_body(p->request->connection->write);
     }
+
+    return NGX_OK;
 }
 
 
 static int ngx_http_proxy_write_upstream_body(ngx_event_t *wev)
 {
-    while (out) {
-        output_filter(r, hunk);
-        if (again)
-            return
+    int                    rc;
+    ngx_hunk_t            *h, *sh;
+    ngx_chain_t           *ce;
+    ngx_connection_t      *c;
+    ngx_http_request_t    *r;
+    ngx_http_proxy_ctx_t  *p;
+
+    c = (ngx_connection_t *) wev->data;
+    r = (ngx_http_request_t *) c->data;
+    p = (ngx_http_proxy_ctx_t *)
+                         ngx_http_get_module_ctx(r, ngx_http_proxy_module_ctx);
+
+    while (p->out_hunks) {
+        h = p->out_hunks->hunk;
+        rc = ngx_http_output_filter(r, h);
+
+        if (rc == NGX_ERROR) {
+            return NGX_ERROR;
+        }
 
-        if (hunk done)
-            remove from out
-            if (hunk is memory)
-                add it to free
+        if (rc == NGX_AGAIN || h->pos < h->last) {
+            return NGX_AGAIN;
+        }
+
+        p->out_hunks = p->out_hunks->next;
+
+        /* if the complete hunk has a shadow hunk
+           then add a shadow hunk to p->free_hunks chain */
+
+        sh = h->shadow;
+
+        if (sh) {
+            sh->pos = sh->last = sh->start;
+            ngx_test_null(ce, ngx_create_chain_entry(r->pool), NGX_ERROR);
+            ce->hunk = sh;
+            ce->next = p->free_hunks;
+            p->free_hunks = ce;
+        }
     }
+
+    return NGX_OK;
 }
 
 
 
-#endif
-
 
 
 
@@ -1482,9 +1586,36 @@ static int ngx_read_http_proxy_status_li
 }
 
 
+static int ngx_http_proxy_init(ngx_pool_t *pool)
+{
+    int         i;
+    ngx_file_t  file;
+    ngx_path_t  path;
+
+    file.log = pool->log;
+
+    path.name.data = "temp";
+    path.name.len = 4;
+    path.level[0] = 1;
+    path.level[1] = 2;
+    path.level[2] = 3;
+    path.len = 0;
+
+    for (i = 0; i < 3; i++) {
+        if (path.level[i] == 0) {
+            break;
+        }
+        path.len += path.level[i] + 1;
+    }
+
+    return ngx_create_temp_file(&file, &path, pool, 123456789, 2, 0);
+}
+
+
 static void *ngx_http_proxy_create_loc_conf(ngx_pool_t *pool)
 {
-    ngx_http_proxy_loc_conf_t *conf;
+    int                         i;
+    ngx_http_proxy_loc_conf_t  *conf;
 
     ngx_test_null(conf,
                   ngx_pcalloc(pool, sizeof(ngx_http_proxy_loc_conf_t)),
@@ -1498,6 +1629,22 @@ static void *ngx_http_proxy_create_loc_c
     conf->header_size = 1024;
     conf->block_size = 4096;
     conf->max_block_size = 32768;
+
+    ngx_test_null(conf->temp_path, ngx_pcalloc(pool, sizeof(ngx_path_t)), NULL);
+
+    conf->temp_path->name.data = "temp";
+    conf->temp_path->name.len = 4;
+    conf->temp_path->level[0] = 1;
+    conf->temp_path->level[1] = 2;
+    conf->temp_path->level[2] = 3;
+    conf->temp_path->len = 0;
+
+    for (i = 0; i < 3; i++) {
+        if (conf->temp_path->level[i] == 0) {
+            break;
+        }
+        conf->temp_path->len += conf->temp_path->level[i] + 1;
+    }
     /**/
 
     return conf;

--- a/src/http/modules/proxy/ngx_http_event_proxy_handler.h
+++ b/src/http/modules/proxy/ngx_http_event_proxy_handler.h
@@ -71,6 +71,9 @@ typedef struct {
     int   block_size;
     int   max_block_size;
 
+    ngx_path_t  *temp_path;
+    int   temp_file_warn;
+
     int   retry_500_error;
 
 } ngx_http_proxy_loc_conf_t;
@@ -91,7 +94,26 @@ typedef struct {
 typedef struct ngx_http_proxy_ctx_s  ngx_http_proxy_ctx_t;
 
 struct ngx_http_proxy_ctx_s {
-    ngx_chain_t  *out;
+    ngx_chain_t   *in_hunks;
+    ngx_chain_t   *last_in_hunk;
+
+    ngx_chain_t   *out_hunks;
+    ngx_chain_t   *last_out_hunk;
+
+    ngx_chain_t   *free_hunks;
+
+    ngx_chain_t   *request_hunks;
+
+    ngx_connection_t               *connection;
+    ngx_http_request_t             *request;
+    ngx_http_proxy_headers_in_t     headers_in;
+
+
+    int           block_size;
+    int           allocated;
+
+    ngx_file_t   *temp_file;
+    off_t         temp_offset;
 
     int           last_hunk;
     ngx_array_t   hunks;
@@ -99,10 +121,6 @@ struct ngx_http_proxy_ctx_s {
 
     int           hunk_n;
 
-    ngx_connection_t               *connection;
-    ngx_http_request_t             *request;
-    ngx_http_proxy_headers_in_t     headers_in;
-
     ngx_http_proxy_upstream_url_t  *upstream_url;
     ngx_http_proxy_upstreams_t     *upstreams;
     int                             cur_upstream;

--- a/src/http/ngx_http.h
+++ b/src/http/ngx_http.h
@@ -148,6 +148,7 @@ struct ngx_http_request_s {
     int         path_err;
 
     unsigned  proxy:1;
+    unsigned  cachable:1;
     unsigned  pipeline:1;
     unsigned  keepalive:1;
     unsigned  lingering_close:1;

--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -370,12 +370,12 @@ ngx_log_debug(r->connection->log, "HTTP 
         err = ngx_errno;
         ngx_log_error(NGX_LOG_ERR, r->connection->log, err,
                       "ngx_http_core_translate_handler: "
-                      ngx_file_type_n " %s failed", r->file.name.data);
+                      ngx_file_type_n " \"%s\" failed", r->file.name.data);
 
         if (err == NGX_ENOENT) {
             return NGX_HTTP_NOT_FOUND;
 
-        } else if (err == ERROR_PATH_NOT_FOUND) {
+        } else if (err == NGX_ENOTDIR) {
             return NGX_HTTP_NOT_FOUND;
 
         } else if (err == NGX_EACCES) {
@@ -396,17 +396,14 @@ ngx_log_debug(r->connection->log, "HTTP 
         err = ngx_errno;
         ngx_log_error(NGX_LOG_ERR, r->connection->log, ngx_errno,
                       "ngx_http_core_handler: "
-                      ngx_open_file_n " %s failed", r->file.name.data);
+                      ngx_open_file_n " \"%s\" failed", r->file.name.data);
 
         if (err == NGX_ENOENT) {
             return NGX_HTTP_NOT_FOUND;
-#if (WIN32)
-        } else if (err == ERROR_PATH_NOT_FOUND) {
-            return NGX_HTTP_NOT_FOUND;
-#else
+
         } else if (err == NGX_ENOTDIR) {
             return NGX_HTTP_NOT_FOUND;
-#endif
+
         } else if (err == NGX_EACCES) {
             return NGX_HTTP_FORBIDDEN;
 
@@ -419,12 +416,13 @@ ngx_log_debug(r->connection->log, "HTTP 
         if (ngx_stat_fd(r->file.fd, &r->file.info) == NGX_FILE_ERROR) {
             ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
                           "ngx_http_core_handler: "
-                          ngx_stat_fd_n " %s failed", r->file.name.data);
+                          ngx_stat_fd_n " \"%s\" failed", r->file.name.data);
 
             if (ngx_close_file(r->file.fd) == NGX_FILE_ERROR) {
                 ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
                               "ngx_http_core_handler: "
-                              ngx_close_file_n " %s failed", r->file.name.data);
+                              ngx_close_file_n " \"%s\" failed",
+                              r->file.name.data);
             }
 
             return NGX_HTTP_INTERNAL_SERVER_ERROR;
@@ -441,7 +439,7 @@ ngx_log_debug(r->connection->log, "HTTP 
         if (ngx_close_file(r->file.fd) == NGX_FILE_ERROR) {
             ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
                           "ngx_http_core_handler: "
-                          ngx_close_file_n " %s failed", r->file.name.data);
+                          ngx_close_file_n " \"%s\" failed", r->file.name.data);
         }
 #endif
 
@@ -487,12 +485,12 @@ static int ngx_http_core_index_handler(n
 
             if (rc == NGX_HTTP_NOT_FOUND) {
                 ngx_log_error(NGX_LOG_ERR, r->connection->log, r->path_err,
-                              "%s is not found", r->path.data);
+                              "\"%s\" is not found", r->path.data);
             }
 
             if (rc == NGX_HTTP_FORBIDDEN) {
                 ngx_log_error(NGX_LOG_ERR, r->connection->log, r->path_err,
-                          "%s is forbidden", r->path.data);
+                          "\"%s\" is forbidden", r->path.data);
             }
 
             return rc;
@@ -501,7 +499,7 @@ static int ngx_http_core_index_handler(n
 
     r->path.data[r->path.len] = '\0';
     ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
-                  "directory index of %s is forbidden", r->path.data);
+                  "directory index of \"%s\" is forbidden", r->path.data);
 
     return NGX_HTTP_FORBIDDEN;
 }
@@ -550,7 +548,7 @@ int ngx_http_close_request(ngx_http_requ
     if (r->file.fd != NGX_INVALID_FILE) {
         if (ngx_close_file(r->file.fd) == NGX_FILE_ERROR) {
             ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
-                          ngx_close_file_n " failed");
+                          ngx_close_file_n " \"%s\" failed", r->file.name.data);
         }
     }
 

--- a/src/os/unix/ngx_errno.h
+++ b/src/os/unix/ngx_errno.h
@@ -10,6 +10,7 @@ typedef int               ngx_err_t;
 #define NGX_ENOENT        ENOENT
 #define NGX_EINTR         EINTR
 #define NGX_EACCES        EACCES
+#define NGX_EEXIST        EEXIST 
 #define NGX_ENOTDIR       ENOTDIR
 #define NGX_EAGAIN        EWOULDBLOCK
 #define NGX_EINPROGRESS   EINPROGRESS

--- a/src/os/unix/ngx_files.c
+++ b/src/os/unix/ngx_files.c
@@ -1,7 +1,11 @@
 
 #include <ngx_config.h>
 #include <ngx_core.h>
+#include <ngx_hunk.h>
+#include <ngx_array.h>
 #include <ngx_file.h>
+#include <ngx_files.h>
+
 
 ssize_t ngx_read_file(ngx_file_t *file, char *buf, size_t size, off_t offset)
 {
@@ -12,7 +16,7 @@ ssize_t ngx_read_file(ngx_file_t *file, 
     n = pread(file->fd, buf, size, offset);
 
     if (n == -1) {
-        ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno, "pread() failed");
+        ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "pread() failed");
         return NGX_ERROR;
     }
 
@@ -29,13 +33,66 @@ ssize_t ngx_write_file(ngx_file_t *file,
     n = pwrite(file->fd, buf, size, offset);
 
     if (n == -1) {
-        ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno, "pwrite() failed");
+        ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "pwrite() failed");
+        return NGX_ERROR;
+    }
+
+    if ((size_t) n != size) {
+        ngx_log_error(NGX_LOG_CRIT, file->log, 0,
+                      "pwrite() has written only %d of %d", n, size);
         return NGX_ERROR;
     }
 
-    if (n != size) {
-        ngx_log_error(NGX_LOG_ERR, file->log, 0,
-                      "pwrite() has written only %d of %d", n, size);
+    file->offset += n;
+
+    return n;
+}
+
+
+ssize_t ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *ce,
+                                off_t offset, ngx_pool_t *pool)
+{
+    size_t         size;
+    ssize_t        n;
+    struct iovec  *iov;
+    ngx_err_t      err;
+    ngx_array_t    io;
+
+    /* use pwrite() if there's the only hunk in a chain */
+
+    if (ce->next == NULL) {
+        return ngx_write_file(file, ce->hunk->pos,
+                              ce->hunk->last - ce->hunk->pos, offset);
+    }
+
+    ngx_init_array(io, pool, 10, sizeof(struct iovec), NGX_ERROR);
+    size = 0;
+
+    while (ce) {
+        ngx_test_null(iov, ngx_push_array(&io), NGX_ERROR);
+        iov->iov_base = ce->hunk->pos;
+        iov->iov_len = ce->hunk->last - ce->hunk->pos;
+        size += ce->hunk->last - ce->hunk->pos;
+        ce = ce->next;
+    }
+
+    if (lseek(file->fd, offset, SEEK_SET) == -1) {
+        ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "lseek() failed");
+        return NGX_ERROR;
+    }
+
+    n = writev(file->fd, (struct iovec *) io.elts, io.nelts);
+
+    ngx_destroy_array(&io);
+
+    if (n == -1) {
+        ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "writev() failed");
+        return NGX_ERROR;
+    }
+
+    if ((size_t) n != size) {
+        ngx_log_error(NGX_LOG_CRIT, file->log, 0,
+                      "writev() has written only %d of %d", n, size);
         return NGX_ERROR;
     }
 

--- a/src/os/unix/ngx_files.h
+++ b/src/os/unix/ngx_files.h
@@ -5,6 +5,8 @@
 #include <ngx_config.h>
 
 #include <ngx_types.h>
+#include <ngx_alloc.h>
+#include <ngx_hunk.h>
 #include <ngx_file.h>
 
 
@@ -19,11 +21,24 @@
 #define ngx_close_file           close
 #define ngx_close_file_n         "close()"
 
+#define ngx_open_tempfile(name, persistent)                                 \
+                                 open(name, O_CREAT|O_EXCL|O_WRONLY, 0600)
+#define ngx_open_tempfile_n      "open()"
+
 ssize_t ngx_read_file(ngx_file_t *file, char *buf, size_t size, off_t offset);
 #define ngx_read_file_n          "read()"
 
 #define NGX_FILE_RDONLY          O_RDONLY
 
+ssize_t ngx_write_file(ngx_file_t *file, char *buf, size_t size, off_t offset);
+
+ssize_t ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *ce,
+                                off_t offset, ngx_pool_t *pool);
+
+
+#define ngx_mkdir(name)          mkdir(name, 0700)
+#define ngx_mkdir_n              "mkdir()"
+
 
 #define ngx_file_type(file, sb)  stat(file, sb)
 #define ngx_file_type_n          "stat()"

--- a/src/os/unix/ngx_freebsd_write_chain.c
+++ b/src/os/unix/ngx_freebsd_write_chain.c
@@ -140,7 +140,7 @@ ngx_chain_t *ngx_freebsd_write_chain(ngx
 
     c->sent += sent;
 
-    for (ce = in; ce; ce = ce->next) {
+    for (ce = in; ce && sent > 0; ce = ce->next) {
 
         if (ce->hunk->type & NGX_HUNK_IN_MEMORY) {
             size = ce->hunk->last - ce->hunk->pos;

--- a/src/os/unix/ngx_recv_chain.c
+++ b/src/os/unix/ngx_recv_chain.c
@@ -8,10 +8,10 @@
 
 ssize_t ngx_recv_chain(ngx_connection_t *c, ngx_chain_t *ce)
 {
-    int              n;
-    struct iovec   *iov;
-    ngx_err_t       err;
-    ngx_array_t     io;
+    ssize_t         n;
+    struct iovec  *iov;
+    ngx_err_t      err;
+    ngx_array_t    io;
 
     ngx_init_array(io, c->pool, 10, sizeof(struct iovec), NGX_ERROR);
 

--- a/src/os/win32/ngx_errno.h
+++ b/src/os/win32/ngx_errno.h
@@ -12,6 +12,8 @@ typedef DWORD             ngx_err_t;
 
 #define NGX_ENOENT        ERROR_FILE_NOT_FOUND
 #define NGX_EACCES        ERROR_ACCESS_DENIED
+#define NGX_EEXIST        ERROR_FILE_EXISTS
+#define NGX_ENOTDIR       ERROR_PATH_NOT_FOUND
 #define NGX_EAGAIN        WSAEWOULDBLOCK
 #define NGX_EINPROGRESS   WSAEINPROGRESS
 #define NGX_EADDRINUSE    WSAEADDRINUSE

--- a/src/os/win32/ngx_files.h
+++ b/src/os/win32/ngx_files.h
@@ -26,6 +26,17 @@
                        NULL, OPEN_EXISTING, 0, NULL)
 */
 
+#define ngx_open_tempfile(name, persistent)                                 \
+            CreateFile(name,                                                \
+                    GENERIC_READ|GENERIC_WRITE,                             \
+                    FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,     \
+                    NULL,                                                   \
+                    CREATE_NEW,                                             \
+                    persistent ? 0:                                         \
+                        FILE_ATTRIBUTE_TEMPORARY|FILE_FLAG_DELETE_ON_CLOSE, \
+                    NULL);
+
+
 #define ngx_open_file_n             "CreateFile()"
 
 #define NGX_FILE_RDONLY             GENERIC_READ
@@ -33,6 +44,9 @@
 #define ngx_close_file              CloseHandle
 #define ngx_close_file_n            "CloseHandle()"
 
+#define ngx_mkdir(name)             CreateDirectory(name, NULL)
+#define ngx_mkdir_n                 "CreateDirectory()"
+
 int ngx_file_type(char *filename, ngx_file_info_t *fi);
 #define ngx_file_type_n             "GetFileAttributes"