Mercurial > hg > nginx-quic
view src/os/win32/ngx_wsarecv_chain.c @ 4749:613750237b36
Entity tags: the "etag" directive.
It allows to disable generation of nginx's own entity tags, while
still handling ETags in cache properly. This may be useful e.g.
if one want to serve static files from servers with different ETag
generation algorithms.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 09 Jul 2012 14:53:42 +0000 |
parents | d620f497c50f |
children | ec81934727a1 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #define NGX_WSABUFS 8 ssize_t ngx_wsarecv_chain(ngx_connection_t *c, ngx_chain_t *chain) { int rc; u_char *prev; u_long bytes, flags; size_t size; ngx_err_t err; ngx_array_t vec; ngx_event_t *rev; LPWSABUF wsabuf; WSABUF wsabufs[NGX_WSABUFS]; prev = NULL; wsabuf = NULL; flags = 0; size = 0; bytes = 0; vec.elts = wsabufs; vec.nelts = 0; vec.size = sizeof(WSABUF); vec.nalloc = NGX_WSABUFS; vec.pool = c->pool; /* coalesce the neighbouring bufs */ while (chain) { if (prev == chain->buf->last) { wsabuf->len += chain->buf->end - chain->buf->last; } else { wsabuf = ngx_array_push(&vec); if (wsabuf == NULL) { return NGX_ERROR; } wsabuf->buf = (char *) chain->buf->last; wsabuf->len = chain->buf->end - chain->buf->last; } size += chain->buf->end - chain->buf->last; prev = chain->buf->end; chain = chain->next; } ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, "WSARecv: %d:%d", vec.nelts, wsabuf->len); rc = WSARecv(c->fd, vec.elts, vec.nelts, &bytes, &flags, NULL, NULL); rev = c->read; if (rc == -1) { rev->ready = 0; err = ngx_socket_errno; if (err == WSAEWOULDBLOCK) { ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, "WSARecv() not ready"); return NGX_AGAIN; } rev->error = 1; ngx_connection_error(c, err, "WSARecv() failed"); return NGX_ERROR; } if (bytes < size) { rev->ready = 0; } if (bytes == 0) { rev->eof = 1; } return bytes; }