new file mode 100644
--- /dev/null
+++ b/src/http/ngx_http_request_body.c
@@ -0,0 +1,196 @@
+
+
+
+
+int ngx_http_start_read_client_body(ngx_http_proxy_ctx_t *p)
+{
+    int                  first_part, size;
+    ngx_hunk_t          *h;
+    ngx_http_request_t  *r;
+
+    r = p->request;
+
+    first_part = r->header_in->last - r->header_in->pos;
+
+    if (first_part > r->headers_in.content_length_n) {
+        first_part = r->headers_in.content_length_n;
+        size = 0;
+
+    } else {
+        size = r->headers_in.content_length_n - first_part;
+        if (size > p->lcf->client_request_buffer_size) {
+            size = p->lcf->client_request_buffer_size;
+
+        } else if (size > NGX_PAGE_SIZE) {
+            size = ((size + NGX_PAGE_SIZE) / NGX_PAGE_SIZE) * NGX_PAGE_SIZE;
+        }
+
+        if (size) {
+            ngx_test_null(p->client_request_hunk, ngx_palloc(r->pool, size),
+                          NGX_ERROR);
+        }
+    }
+
+    if (first_part) {
+        ngx_test_null(h, ngx_alloc_hunk(r->pool), NGX_ERROR);
+
+        h->type = NGX_HUNK_IN_MEMORY|NGX_HUNK_TEMP;
+        h->pos = h->start = h->pre_start = r->header_in->pos;
+        h->last = h->end = h->post_end = r->header_in->pos + first_part;
+        h->file_pos = h->file_last = 0;
+        h->file = NULL;
+        h->shadow = NULL;
+        h->tag = 0;
+
+        p->client_first_part_hunk = h;
+    }
+
+    return NGX_OK;
+}
+
+
+int ngx_http_read_client_body(ngx_event_t *rev)
+{
+
+    do {
+        if (r->header_in->last < r->header_in->end) {
+            rb->chain[0].hunk = r->header_in;
+
+            if (rb->hunk) {
+                rb->chain[0].next = &rb->chain[1];
+                rb->chain[1].hunk = rb->hunk;
+                rb->chain[1].next = NULL;
+
+            } else {
+                rb->chain[0].next = NULL;
+            }
+
+        } else {
+            rb->chain[0].hunk = rb->hunk;
+            rb->chain[0].next = NULL;
+        }
+
+        n = ngx_recv_chain(c, &rb->chain);
+
+        if (n == NGX_ERROR) {
+            return NGX_ERROR;
+        }
+
+        if (n == NGX_AGAIN) {
+            return NGX_AGAIN;
+        }
+
+        for (entry = &rb->chain; entry; entry = entry->next) {
+            size = entry->hunk->end - entry->hunk->last;
+
+            if (n >= size) {
+                n -= size;
+                entry->hunk->last = entry->hunk->end;
+
+                continue;
+            }
+
+            entry->hunk->last += n;
+
+            break;
+        }
+
+        if (rb->hunk && rb->hunk->last == rb->hunk->end) {
+            if (rb->temp_file->fd == NGX_INVALID_FILE) {
+                rc = ngx_create_temp_file(rb->temp_file, rb->temp_path, r->pool,
+                                          rb->number, rb->random, 0);
+
+                if (rc == NGX_ERROR) {
+                    return NGX_ERROR;
+                }
+
+                if (rc == NGX_AGAIN) {
+                    return NGX_AGAIN;
+                }
+            }
+
+            n = ngx_write_file(rb->temp_file, rb->hunk,
+                               rb->hunk->last - rb->hunk->pos, rb->offset);
+
+            if (rc == NGX_ERROR) {
+                return NGX_ERROR;
+            }
+
+            rb->offset += n;
+            rb->hunk->last = rb->hunk->pos;
+        }
+
+    } while (rev->ready);
+
+    return NGX_OK;
+}
+
+
+int ngx_init_client_request_body_chain(ngx_http_reuqest_t *r)
+{
+    int                       i;
+    ngx_hunk_t               *h;
+    ngx_http_request_body_t  *rb;
+
+    rb = r->request_body;
+
+    rb->chain[0].hunk = rb->header_out;
+    i = 0;
+
+    if (r->header_in->pos < r->header_in->last) {
+        rb->chain[i].next = &rb->chain[i + 1];
+        i++;
+        rb->chain[i].hunk = r->header_in;
+    }
+
+    if (rb->temp_file->fd != NGX_INVALID_FILE) {
+        if (rb->file_hunk == NULL) {
+            ngx_test_null(h, ngx_alloc_hunk(r->pool), NGX_ERROR);
+
+            h->type = NGX_HUNK_FILE;
+            h->pos = h->start = h->pre_start = 0;
+            h->last = h->end = h->post_end = 0;
+            h->file_pos = 0;
+            h->file_last = rb->offset;
+            h->file = rb->temp_file;
+            h->shadow = NULL;
+            h->tag = 0;
+
+            rb->file_hunk = h;
+        }
+
+        rb->chain[i].next = &rb->chain[i + 1];
+        i++;
+        rb->chain[i].hunk = rb->file_hunk;
+    }
+
+    if (rb->hunk && rb->hunk->pos < rb->hunk->last) {
+        rb->chain[i].next = &rb->chain[i + 1];
+        i++;
+        rb->chain[i].hunk = h;
+    }
+
+    rb->chain[i].next = NULL;
+
+    return NGX_OK;
+}
+
+
+int ngx_reinit_client_request_body_hunks(ngx_http_reuqest_t *r)
+{
+    ngx_http_request_body_t  *rb;
+
+    rb = r->request_body;
+
+    if (rb->header_in_pos) {
+        r->header_in->pos = rb->header_in_pos;
+    }
+
+    if (rb->file_hunk) {
+        rb->file_hunk->file_pos = rb->file_hunk->file_start;
+    }
+
+    if (rb->hunk) {
+        rb->hunk->pos = rb->hunk->start;
+    }
+}