nginx-0.0.1-2002-08-15-21:20:26 import

9 files changed, 767 insertions, 41 deletions

diff --git a/src/http/modules/ngx_http_header_filter.c b/src/http/modules/ngx_http_header_filter.c
new file mode 100644
index 000000000..1742b8bfc
--- /dev/null
+++ b/src/http/modules/ngx_http_header_filter.c
@@ -0,0 +1,55 @@
+
+
+typedef struct {
+    int    len;
+    char  *line;
+} line;
+
+
+static line http_codes[] = {
+    { 6, "200 OK" }
+};
+
+
+
+
+int ngx_http_header_filter(ngx_http_request_t *r)
+{
+    int  status;
+    ngx_hunk_t  *h;
+
+    ngx_test_null(h, ngx_get_hunk(r->pool, 1024, 0, 64), NGX_HTTP_FILTER_ERROR);
+
+    status = r->headers_out->status - GX_HTTP_OK;
+
+    ngx_memcpy(h->pos.mem, "HTTP/1.0 ", 9);
+    h->pos.mem += 9;
+    ngx_memcpy(h->pos.mem, http_codes[status].line, http_codes[status].len);
+    h->pos.mem += http_codes[status].len;
+    *(h->pos.mem++) = CR; *(h->pos.mem++) = LF;
+
+    memcpy(h->pos.mem, "Date: ", 6);
+    h->pos.mem += 6;
+    h->pos.mem += ngx_http_get_time(h->pos.mem, time());
+    *(h->pos.mem++) = CR; *(h->pos.mem++) = LF;
+
+    /* 2^64 is 20 characters  */
+    if (r->headers_out->content_length)
+        h->pos.mem += ngx_snprintf(h->pos.mem, 49, "Content-Length: %d" CRLF,
+                                   r->headers_out->content_length);
+
+    /* check */
+
+    memcpy(h->pos.mem, "Server: ", 8);
+    h->pos.mem += 8;
+    if (r->headers_out->server) {
+        h->pos.mem = ngx_cpystrn(h->pos.mem, r->headers_out->server,
+                                 h->last.mem - h->pos.mem);
+        check space
+    } else {
+        ngx_memcpy(h->pos.mem, NGINX_VER, sizeof(NGINX_VER));
+        h->pos.mem += sizeof(NGINX_VER);
+    }
+    *(h->pos.mem++) = CR; *(h->pos.mem++) = LF;
+    
+}
diff --git a/src/http/modules/ngx_http_index_handler.c b/src/http/modules/ngx_http_index_handler.c
index 498dda664..2d3f3663d 100644
--- a/src/http/modules/ngx_http_index_handler.c
+++ b/src/http/modules/ngx_http_index_handler.c
@@ -20,10 +20,11 @@ int ngx_http_index_handler(ngx_http_request_t *r)
                     ngx_get_module_loc_conf(r, &ngx_http_index_handler_module);
 
     index_len = (*(r->uri_end - 1) == '/') ? cf->max_index_len : 0;
-    name = ngx_palloc(r->pool, r->uri_end - r->uri_start + index_len
-                              + r->server->doc_root_len);
-    if (name == NULL)
-        return NGX_ERROR;
+
+    ngx_test_null(name,
+                  ngx_palloc(r->pool, r->uri_end - r->uri_start + index_len
+                                      + r->server->doc_root_len),
+                  NGX_HTTP_INTERNAL_SERVER_ERROR);
 
     loc = ngx_cpystrn(name, r->server->doc_root, r->server->doc_root_len);
     file = ngx_cpystrn(loc, r->uri_start, r->uri_end - r->uri_start + 1);
@@ -39,7 +40,7 @@ int ngx_http_index_handler(ngx_http_request_t *r)
             if (err == NGX_ENOENT)
                 return NGX_HTTP_NOT_FOUND;
             else
-                return NGX_ERROR;
+                return NGX_HTTP_INTERNAL_SERVER_ERROR;
         }
 
         if (ngx_is_dir(r->stat)) {
diff --git a/src/http/modules/ngx_http_static_handler.c b/src/http/modules/ngx_http_static_handler.c
new file mode 100644
index 000000000..f2053c443
--- /dev/null
+++ b/src/http/modules/ngx_http_static_handler.c
@@ -0,0 +1,101 @@
+
+#include <ngx_config.h>
+
+#include <ngx_strings.h>
+#include <ngx_open.h>
+#include <ngx_stat.h>
+
+#include <ngx_http.h>
+
+int ngx_http_static_handler(ngx_http_request_t *r)
+{
+    int          index_len, err, i;
+    char        *name, *loc, *file
+    ngx_file_t   fd;
+
+    ngx_http_header_out_t  out;
+    ngx_http_event_static_handler_loc_conf_t  *cf;
+
+    cf = (ngx_http_event_static_handler_loc_conf_t *)
+             ngx_get_module_loc_conf(r, &ngx_http_event_static_handler_module);
+
+    ngx_assert(r->fd, return NGX_HTTP_INTERNAL_SERVER_ERROR,
+               r->connection->log, "ngx_http_static_handler: no file");
+
+    out.status = NGX_HTTP_OK;
+    out.content_length = r->stat.sb_size;
+    out.last_modified = r->stat.sb_mtime;
+
+    /* */
+    out.content_type = "text/html";
+
+    rc = ngx_send_http_header(&out);
+    if (r->header_only)
+        return rc;
+
+    /* NGX_HTTP_INTERNAL_SERVER_ERROR is too late */
+
+    ngx_test_null(h, ngx_create_hunk(r->pool), NGX_HTTP_INTERNAL_SERVER_ERROR);
+    h->type = NGX_HUNK_FILE | NGX_HUNK_LAST;
+    h->fd = r->fd;
+    h->pos.file = 0;
+    h->end.file = r->stat.sb_size;
+
+    ngx_test_null(ch, ngx_create_chain(r->pool),
+                  NGX_HTTP_INTERNAL_SERVER_ERROR);
+    ch->hunk = h;
+    ch->next = NULL;
+
+    return ngx_http_filter(ch);
+}
+
+/*
+
+static void *ngx_create_index_config()
+{
+    ngx_http_index_handler_loc_conf_t  *cf;
+
+    ngx_check_null(cf, ngx_alloc(p, sizeof(ngx_http_index_handler_loc_conf)),
+                   NULL);
+
+    cf->indices = ngx_create_array(p, sizeof(ngx_http_index_t), 5);
+    if (cf->indices == NULL)
+        return NULL;
+
+    cf->max_index_len = 0;
+
+    return cf;
+}
+
+static void *ngx_merge_index_config()
+{
+    if (p->indices->nelts > 0) {
+
+        copy and check dups
+
+        if (c->max_index_len < c->max_index_len)
+            c->max_index_len < c->max_index_len);
+    }
+}
+
+static void *ngx_set_index()
+{
+    if (*conf == NULL) {
+        cf = ngx_create_index_conf();
+        if (cf == NULL)
+            return "can not create config";
+    }
+
+    while (args) {
+       index = ngx_push_array(cf->indices);
+       index->name = arg;
+       index->len = ngx_strlen(arg) + 1;
+
+       if (cf->max_index_len < index->len)
+           cf->max_index_len = index->len;
+    }
+
+    *conf = cf;
+}
+
+*/
diff --git a/src/http/ngx_http.h b/src/http/ngx_http.h
index 62e10f750..6fa0f7829 100644
--- a/src/http/ngx_http.h
+++ b/src/http/ngx_http.h
@@ -23,6 +23,13 @@
 
 
 typedef struct {
+    void *ctx;   /* STUB */
+} ngx_http_module_t;
+
+/* STUB */
+#define ngx_get_module_ctx(r, module)  (module)->ctx
+
+typedef struct {
     char *buff;
     char *pos;
     char *last;
diff --git a/src/http/ngx_http_event.c b/src/http/ngx_http_event.c
index 8c3ada844..24cbb5663 100644
--- a/src/http/ngx_http_event.c
+++ b/src/http/ngx_http_event.c
@@ -38,10 +38,7 @@ int ngx_http_init_connection(ngx_connection_t *c)
     ngx_event_t  *ev;
 
     ev = c->read;
-/*
     ev->event_handler = ngx_http_init_request;
-*/
-    ev->event_handler = NULL;
     ev->log->action = "reading client request line";
 
     ngx_log_debug(ev->log, "ngx_http_init_connection: entered");
@@ -62,8 +59,6 @@ int ngx_http_init_connection(ngx_connection_t *c)
 #endif
 }
 
-#if 0
-
 int ngx_http_init_request(ngx_event_t *ev)
 {
     ngx_connection_t   *c = (ngx_connection_t *) ev->data;
@@ -71,11 +66,13 @@ int ngx_http_init_request(ngx_event_t *ev)
 
     ngx_log_debug(ev->log, "ngx_http_init_request: entered");
 
+    ngx_test_null(c->pool, ngx_create_pool(16384, ev->log), -1);
     ngx_test_null(r, ngx_pcalloc(c->pool, sizeof(ngx_http_request_t)), -1);
 
     c->data = r;
     r->connection = c;
 
+    ngx_test_null(r->pool, ngx_create_pool(16384, ev->log), -1);
     ngx_test_null(r->buff, ngx_palloc(r->pool, sizeof(ngx_buff_t)), -1);
     ngx_test_null(r->buff->buff,
                   ngx_pcalloc(r->pool, sizeof(c->server->buff_size)), -1);
@@ -99,33 +96,15 @@ int ngx_http_process_request(ngx_event_t *ev)
 
     ngx_log_debug(ev->log, "http process request");
 
-    ngx_log_debug(ev->log, "http: eof:%d, avail:%d", ev->eof, ev->available);
-
-    if (ev->eof && ev->available == 0) {
-        if (ev->err_no)
-            ngx_log_error(NGX_LOG_ERR, ev->log, ev->err_no,
-                         "ngx_http_process_request: "
-                         "read failed while %s", ev->action);
-
-        return -1;
-    }
-
-    if ((n = read(c->fd, r->buff->last, r->buff->end - r->buff->last)) == -1) {
+    n = ngx_event_recv(ev, r->buff->last, r->buff->end - r->buff->last);
 
-        if (errno == NGX_EWOULDBLOCK) {
-            ngx_log_error(NGX_LOG_INFO, ev->log, errno,
-                         "ngx_http_process_request: "
-                         "EAGAIN while %s", ev->action);
-            return 0;
-        }
+    if (n == -2)
+        return 0;
 
-        ngx_log_error(NGX_LOG_ERR, ev->log, errno,
-                     "ngx_http_process_request: "
-                     "read failed while %s", ev->action);
+    if (n == -1)
         return -1;
-    }
 
-    ngx_log_debug(ev->log, "http read %d", n);
+    ngx_log_debug(ev->log, "http read %d" _ n);
 
     if (n == 0) {
         if (ev->unexpected_eof) {
@@ -138,8 +117,6 @@ int ngx_http_process_request(ngx_event_t *ev)
         return ngx_http_close_request(ev);
     }
 
-    n == r->buff->end - r->buff->last;
-
     if (!ev->read_discarded) {
         r->buff->last += n;
 
@@ -168,8 +145,8 @@ static int ngx_process_http_request_line(ngx_http_request_t *r)
 
     if ((n = ngx_read_http_request_line(r)) == 1) {
         *r->uri_end = '\0';
-        ngx_log_debug(r->connection->log, "HTTP: %d, %d, %s",
-                     r->method, r->http_version, r->uri_start);
+        ngx_log_debug(r->connection->log, "HTTP: %d, %d, %s" _
+                     r->method _ r->http_version _ r->uri_start);
         r->state_handler = ngx_process_http_request_header;
         r->connection->read->action = "reading client request headers";
     }
@@ -184,8 +161,8 @@ static int ngx_process_http_request_header(ngx_http_request_t *r)
     while ((n = ngx_read_http_header_line(r)) == 1) {
         *r->header_name_end = '\0';
         *r->header_end = '\0';
-        ngx_log_debug(r->connection->log, "HTTP header: '%s: %s'",
-                     r->header_name_start, r->header_start);
+        ngx_log_debug(r->connection->log, "HTTP header: '%s: %s'" _
+                     r->header_name_start _ r->header_start);
     }
 
     if (n != 2)
@@ -203,6 +180,13 @@ static int ngx_process_http_request_header(ngx_http_request_t *r)
 
 static int ngx_process_http_request(ngx_http_request_t *r)
 {
+    return -1;
+}
+
+#if 0
+
+static int ngx_process_http_request(ngx_http_request_t *r)
+{
     int fd;
     struct stat sb;
     ngx_http_header_out_t  *header_out;
@@ -258,6 +242,8 @@ static int ngx_process_http_request(ngx_http_request_t *r)
     return 0;
 }
 
+#endif
+
 static int ngx_http_close_request(ngx_event_t *ev)
 {
     ngx_connection_t *c = (ngx_connection_t *) ev->data;
@@ -269,5 +255,3 @@ static int ngx_http_close_request(ngx_event_t *ev)
 
     return ngx_event_close(ev);
 }
-
-#endif
diff --git a/src/http/ngx_http_filter.h b/src/http/ngx_http_filter.h
new file mode 100644
index 000000000..9d0a53ba3
--- /dev/null
+++ b/src/http/ngx_http_filter.h
@@ -0,0 +1,10 @@
+#ifndef _NGX_HTTP_FILTER_H_INCLUDED_
+#define _NGX_HTTP_FILTER_H_INCLUDED_
+
+
+#define NGX_HTTP_FILTER_ERROR  -1
+#define NGX_HTTP_FILTER_AGAIN   0
+#define NGX_HTTP_FILTER_DONE    1
+
+
+#endif /* _NGX_HTTP_FILTER_H_INCLUDED_ */
diff --git a/src/http/ngx_http_parse.c b/src/http/ngx_http_parse.c
new file mode 100644
index 000000000..6bfab9bfb
--- /dev/null
+++ b/src/http/ngx_http_parse.c
@@ -0,0 +1,475 @@
+
+#include <ngx_config.h>
+#include <ngx_http.h>
+
+int ngx_read_http_request_line(ngx_http_request_t *r)
+{
+    char  ch;
+    char *buff = r->buff->buff;
+    char *p = r->buff->pos;
+    enum {
+        rl_start = 0,
+        rl_space_after_method,
+        rl_spaces_before_uri,
+        rl_after_slash_in_uri,
+        rl_check_uri,
+        rl_uri,
+        rl_http_09,
+        rl_http_version,
+        rl_first_major_digit,
+        rl_major_digit,
+        rl_first_minor_digit,
+        rl_minor_digit,
+        rl_almost_done,
+        rl_done
+    } state = r->state;
+
+    while (p < r->buff->last && state < rl_done) {
+        ch = *p++;
+
+/*
+printf("\nstate: %d, pos: %x, end: %x, char: '%c' buf: %s",
+       state, p, r->buff->last, ch, p);
+*/
+
+        /* GCC complie it as jump table */
+
+        switch (state) {
+
+        /* HTTP methods: GET, HEAD, POST */
+        case rl_start:
+            switch (ch) {
+            case 'G':
+                if (p + 1 >= r->buff->last)
+                    return 0;
+
+                if (*p != 'E' || *(p + 1) != 'T')
+                    return NGX_HTTP_INVALID_METHOD;
+
+                r->method = NGX_HTTP_GET;
+                p += 2;
+                break;
+
+            case 'H':
+                if (p + 2 >= r->buff->last)
+                    return 0;
+
+                if (*p != 'E' || *(p + 1) != 'A' || *(p + 2) != 'D')
+                    return NGX_HTTP_INVALID_METHOD;
+
+                r->method = NGX_HTTP_HEAD;
+                p += 3;
+                break;
+
+            case 'P':
+                if (p + 2 >= r->buff->last)
+                    return 0;
+
+                if (*p != 'O' || *(p + 1) != 'S' || *(p + 2) != 'T')
+                    return NGX_HTTP_INVALID_METHOD;
+
+                r->method = NGX_HTTP_POST;
+                p += 3;
+                break;
+
+            default:
+                return NGX_HTTP_INVALID_METHOD;
+            }
+
+            state = rl_space_after_method;
+            break;
+
+        /* single space after method */
+        case rl_space_after_method:
+            switch (ch) {
+            case ' ':
+                state = rl_spaces_before_uri;
+                break;
+            default:
+                return NGX_HTTP_INVALID_METHOD;
+            }
+            break;
+
+        /* space* before URI */
+        case rl_spaces_before_uri:
+            switch (ch) {
+            case '/':
+                r->uri_start = p - 1;
+                state = rl_after_slash_in_uri;
+                break;
+            case ' ':
+                break;
+            default:
+                r->unusual_uri = 1;
+                r->uri_start = p - 1;
+                state = rl_uri;
+                break;
+            }
+            break;
+
+        /* check dot after slash */
+        case rl_after_slash_in_uri:
+            switch (ch) {
+            case CR:
+                r->uri_end = p - 1;
+                r->http_minor = 9;
+                state = rl_almost_done;
+                break;
+            case LF:
+                r->uri_end = p - 1;
+                r->http_minor = 9;
+                state = rl_done;
+                break;
+            case ' ':
+                r->uri_end = p - 1;
+                state = rl_http_09;
+                break;
+            case '.':
+                r->complex_uri = 1;
+                state = rl_uri;
+                break;
+            case '/':
+                r->complex_uri = 1;
+                state = rl_uri;
+                break;
+            case '?':
+                r->args_start = p;
+                state = rl_uri;
+                break;
+            default:
+                state = rl_check_uri;
+                break;
+            }
+            break;
+
+        /* check slash in URI */
+        case rl_check_uri:
+            switch (ch) {
+            case CR:
+                r->uri_end = p - 1;
+                r->http_minor = 9;
+                state = rl_almost_done;
+                break;
+            case LF:
+                r->uri_end = p - 1;
+                r->http_minor = 9;
+                state = rl_done;
+                break;
+            case ' ':
+                r->uri_end = p - 1;
+                state = rl_http_09;
+                break;
+            case '.':
+                r->uri_ext = p;
+                break;
+            case '/':
+                r->uri_ext = NULL;
+                state = rl_after_slash_in_uri;
+                break;
+            case '?':
+                r->args_start = p;
+                state = rl_uri;
+                break;
+            }
+            break;
+
+        /* URI */
+        case rl_uri:
+            switch (ch) {
+            case CR:
+                r->uri_end = p - 1;
+                r->http_minor = 9;
+                state = rl_almost_done;
+                break;
+            case LF:
+                r->uri_end = p - 1;
+                r->http_minor = 9;
+                state = rl_done;
+                break;
+            case ' ':
+                r->uri_end = p - 1;
+                state = rl_http_09;
+                break;
+            }
+            break;
+
+        /* space+ after URI */
+        case rl_http_09:
+            switch (ch) {
+            case ' ':
+                break;
+            case CR:
+                r->http_minor = 9;
+                state = rl_almost_done;
+                break;
+            case LF:
+                r->http_minor = 9;
+                state = rl_done;
+                break;
+            case 'H':
+                state = rl_http_version;
+                break;
+            default:
+                return NGX_HTTP_INVALID_REQUEST;
+            }
+            break;
+
+        /* TTP/ */
+        case rl_http_version:
+            if (p + 2 >= r->buff->last) {
+                r->state = rl_http_version;
+                r->buff->pos = p - 1;
+                return 0;
+            }
+
+            if (ch != 'T' || *p != 'T' || *(p + 1) != 'P' || *(p + 2) != '/')
+                return NGX_HTTP_INVALID_REQUEST;
+
+            p += 3;
+            state = rl_first_major_digit;
+            break;
+
+        /* first digit of major HTTP version */
+        case rl_first_major_digit:
+            if (ch < '1' || ch > '9')
+                return NGX_HTTP_INVALID_REQUEST;
+
+            r->http_major = ch - '0';
+            state = rl_major_digit;
+            break;
+
+        /* major HTTP version or dot */
+        case rl_major_digit:
+            if (ch == '.') {
+                state = rl_first_minor_digit;
+                break;
+            }
+
+            if (ch < '0' || ch > '9')
+                return NGX_HTTP_INVALID_REQUEST;
+
+            r->http_major = r->http_major * 10 + ch - '0';
+            break;
+
+        /* first digit of minor HTTP version */
+        case rl_first_minor_digit:
+            if (ch < '0' || ch > '9')
+                return NGX_HTTP_INVALID_REQUEST;
+
+            r->http_minor = ch - '0';
+
+            state = rl_minor_digit;
+            break;
+
+        /* minor HTTP version or end of request line */
+        case rl_minor_digit:
+            if (ch == CR) {
+                state = rl_almost_done;
+                break;
+            }
+
+            if (ch == LF) {
+                state = rl_done;
+                break;
+            }
+
+            if (ch < '0' || ch > '9')
+                return NGX_HTTP_INVALID_REQUEST;
+
+            r->http_minor = r->http_minor * 10 + ch - '0';
+            break;
+
+        /* end of request line */
+        case rl_almost_done:
+            switch (ch) {
+            case LF:
+                state = rl_done;
+                break;
+            default:
+                return NGX_HTTP_INVALID_METHOD;
+            }
+            break;
+        }
+    }
+
+    r->buff->pos = p;
+
+    if (state == rl_done) {
+        r->http_version = r->http_major * 1000 + r->http_minor;
+        r->state = rl_start;
+        return 1;
+    } else {
+        r->state = state;
+        return 0;
+    }
+}
+
+int ngx_read_http_header_line(ngx_http_request_t *r)
+{
+    char  c, ch;
+    char *buff = r->buff->buff;
+    char *p = r->buff->pos;
+    enum  {
+        hl_start = 0,
+        hl_name,
+        hl_space_before_value,
+        hl_value,
+        hl_space_after_value,
+        hl_almost_done,
+        header_almost_done,
+        hl_done,
+        header_done
+    } state = r->state;
+
+    while (p < r->buff->last && state < hl_done) {
+        ch = *p++;
+
+/*
+printf("\nstate: %d, pos: %x, end: %x, char: '%c' buf: %s",
+       state, p, r->buff->last, ch, p);
+*/
+
+        switch (state) {
+
+        /* first char */
+        case hl_start:
+            switch (ch) {
+            case CR:
+                r->header_end = p - 1;
+                state = header_almost_done;
+                break;
+            case LF:
+                r->header_end = p - 1;
+                state = header_done;
+                break;
+            default:
+                state = hl_name;
+                r->header_name_start = p - 1;
+
+                c = ch | 0x20;
+                if (c >= 'a' && c <= 'z')
+                    break;
+
+                if (ch == '-')
+                    break;
+
+                if (ch >= '0' && ch <= '9')
+                    break;
+
+                return NGX_HTTP_INVALID_HEADER;
+
+            }
+            break;
+
+        /* header name */
+        case hl_name:
+            c = ch | 0x20;
+            if (c >= 'a' && c <= 'z')
+                break;
+
+            if (ch == ':') {
+                r->header_name_end = p - 1;
+                state = hl_space_before_value;
+                break;
+            }
+
+            if (ch == '-')
+                break;
+
+            if (ch >= '0' && ch <= '9')
+                break;
+
+            return NGX_HTTP_INVALID_HEADER;
+
+        /* space* before header value */
+        case hl_space_before_value:
+            switch (ch) {
+            case ' ':
+                break;
+            case CR:
+                r->header_start = r->header_end = p - 1;
+                state = hl_almost_done;
+                break;
+            case LF:
+                r->header_start = r->header_end = p - 1;
+                state = hl_done;
+                break;
+            default:
+                r->header_start = p - 1;
+                state = hl_value;
+                break;
+            }
+            break;
+
+        /* header value */
+        case hl_value:
+            switch (ch) {
+            case ' ':
+                r->header_end = p - 1;
+                state = hl_space_after_value;
+                break;
+            case CR:
+                r->header_end = p - 1;
+                state = hl_almost_done;
+                break;
+            case LF:
+                r->header_end = p - 1;
+                state = hl_done;
+                break;
+            }
+            break;
+
+        /* space* before end of header line */
+        case hl_space_after_value:
+            switch (ch) {
+            case ' ':
+                break;
+            case CR:
+                state = hl_almost_done;
+                break;
+            case LF:
+                state = hl_done;
+                break;
+            default:
+                state = hl_value;
+                break;
+            }
+            break;
+
+        /* end of header line */
+        case hl_almost_done:
+            switch (ch) {
+            case LF:
+                state = hl_done;
+                break;
+            default:
+                return NGX_HTTP_INVALID_HEADER;
+            }
+            break;
+
+        /* end of header */
+        case header_almost_done:
+            switch (ch) {
+            case LF:
+                state = header_done;
+                break;
+            default:
+                return NGX_HTTP_INVALID_HEADER;
+            }
+            break;
+        }
+    }
+
+    r->buff->pos = p;
+
+    if (state == hl_done) {
+        r->state = hl_start;
+        return 1;
+    } else if (state == header_done) {
+        r->state = hl_start;
+        return 2;
+    } else {
+        r->state = state;
+        return 0;
+    }
+}
diff --git a/src/http/ngx_http_write_filter.c b/src/http/ngx_http_write_filter.c
new file mode 100644
index 000000000..5e4eaa612
--- /dev/null
+++ b/src/http/ngx_http_write_filter.c
@@ -0,0 +1,82 @@
+
+#include <ngx_config.h>
+
+#include <ngx_hunk.h>
+#include <ngx_http.h>
+#include <ngx_http_filter.h>
+#include <ngx_event_write.h>
+
+#include <ngx_http_write_filter.h>
+
+
+ngx_http_module_t  ngx_http_write_filter_module;
+
+
+/* STUB */
+static ngx_http_write_filter_ctx_t module_ctx;
+
+void ngx_http_write_filter_init()
+{
+     module_ctx.buffer_output = 10240;
+     module_ctx.out = NULL;
+
+     ngx_http_write_filter_module.ctx = &module_ctx;
+}
+/* */
+
+
+int ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in)
+{
+    int    last;
+    off_t  size, flush;
+    ngx_chain_t  *ch, **prev, *chain;
+    ngx_http_write_filter_ctx_t  *ctx;
+
+    ctx = (ngx_http_write_filter_ctx_t *)
+                              ngx_get_module_ctx(r->main ? r->main : r,
+                                                &ngx_http_write_filter_module);
+    size = flush = 0;
+    last = 0;
+    prev = &ctx->out;
+
+    /* find size, flush point and last link of saved chain */
+    for (ch = ctx->out; ch; ch = ch->next) {
+        prev = &ch->next;
+        size += ch->hunk->last.file - ch->hunk->pos.file;
+
+        if (ch->hunk->type & NGX_HUNK_FLUSH)
+            flush = size;
+
+        if (ch->hunk->type & NGX_HUNK_LAST)
+            last = 1;
+    }
+
+    /* add new chain to existent one */
+    for (/* void */; in; in = in->next) {
+        ngx_test_null(ch, ngx_palloc(r->pool, sizeof(ngx_chain_t)),
+                      NGX_HTTP_FILTER_ERROR);
+
+        ch->hunk = in->hunk;
+        ch->next = NULL;
+        *prev = ch;
+        prev = &ch->next;
+        size += ch->hunk->last.file - ch->hunk->pos.file;
+
+        if (ch->hunk->type & NGX_HUNK_FLUSH)
+            flush = size;
+
+        if (ch->hunk->type & NGX_HUNK_LAST)
+            last = 1;
+    }
+
+    if (flush == 0 && size < ctx->buffer_output)
+        return NGX_HTTP_FILTER_DONE;
+
+    chain = ngx_event_write(r->connection, ctx->out, flush);
+    if (chain == (ngx_chain_t *) -1)
+        return NGX_HTTP_FILTER_ERROR;
+
+    ctx->out = chain;
+
+    return (chain ? NGX_HTTP_FILTER_AGAIN : NGX_HTTP_FILTER_DONE);
+}
diff --git a/src/http/ngx_http_write_filter.h b/src/http/ngx_http_write_filter.h
new file mode 100644
index 000000000..6a2c6f24d
--- /dev/null
+++ b/src/http/ngx_http_write_filter.h
@@ -0,0 +1,11 @@
+#ifndef _NGX_HTTP_WRITE_FILTER_H_INCLUDED_
+#define _NGX_HTTP_WRITE_FILTER_H_INCLUDED_
+
+
+typedef struct {
+    ngx_chain_t  *out;
+    size_t        buffer_output;
+} ngx_http_write_filter_ctx_t;
+
+
+#endif /* _NGX_HTTP_WRITE_FILTER_H_INCLUDED_ */