Mercurial > hg > nginx-ranges
view src/core/ngx_output_chain.c @ 34:aab2ea7c0458 NGINX_0_1_17
nginx 0.1.17
*) Change: the ngx_http_rewrite_module was rewritten from the scratch.
Now it is possible to redirect, to return the error codes, to check
the variables and referrers. The directives can be used inside
locations. The redirect directive was canceled.
*) Feature: the ngx_http_geo_module.
*) Feature: the proxy_set_x_var and fastcgi_set_var directives.
*) Bugfix: the location configuration with "=" modifier may be used in
another location.
*) Bugfix: the correct content type was set only for requests that use
small caps letters in extension.
*) Bugfix: if the proxy_pass or fastcgi_pass directives were set in the
location, and access was denied, and the error was redirected to a
static page, then the segmentation fault occurred.
*) Bugfix: if in a proxied "Location" header was a relative URL, then a
host name and a slash were added to them; bug appeared in 0.1.14.
*) Bugfix: the system error message was not logged on Linux.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Thu, 03 Feb 2005 00:00:00 +0300 |
parents | da8c190bdaba |
children | 6cfc63e68377 |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #if 0 #define NGX_SENDFILE_LIMIT 4096 #endif #define NGX_NONE 1 static ngx_inline ngx_int_t ngx_output_chain_need_to_copy(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf); static ngx_int_t ngx_output_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, ngx_chain_t *in); static ngx_int_t ngx_output_chain_copy_buf(ngx_buf_t *dst, ngx_buf_t *src, ngx_uint_t sendfile); ngx_int_t ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in) { int rc, last; off_t bsize; size_t size; ngx_chain_t *cl, *out, **last_out; if (ctx->in == NULL && ctx->busy == NULL) { /* * the short path for the case when the ctx->in and ctx->busy chains * are empty, the incoming chain is empty too or has the single buf * that does not require the copy */ if (in == NULL) { return ctx->output_filter(ctx->filter_ctx, in); } if (in->next == NULL #if (NGX_SENDFILE_LIMIT) && !(in->buf->in_file && in->buf->file_last > NGX_SENDFILE_LIMIT) #endif && (!ngx_output_chain_need_to_copy(ctx, in->buf))) { return ctx->output_filter(ctx->filter_ctx, in); } } /* add the incoming buf to the chain ctx->in */ if (in) { if (ngx_output_chain_add_copy(ctx->pool, &ctx->in, in) == NGX_ERROR) { return NGX_ERROR; } } last = NGX_NONE; out = NULL; last_out = &out; for ( ;; ) { while (ctx->in) { /* * cycle while there are the ctx->in bufs * or there are the free output bufs to copy in */ bsize = ngx_buf_size(ctx->in->buf); if (bsize == 0 && !ngx_buf_special(ctx->in->buf)) { ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, 0, "zero size buf in output " "t:%d r:%d f:%d %p %p-%p %p %O-%O", ctx->in->buf->temporary, ctx->in->buf->recycled, ctx->in->buf->in_file, ctx->in->buf->start, ctx->in->buf->pos, ctx->in->buf->last, ctx->in->buf->file, ctx->in->buf->file_pos, ctx->in->buf->file_last); ngx_debug_point(); ctx->in = ctx->in->next; continue; } if (!ngx_output_chain_need_to_copy(ctx, ctx->in->buf)) { /* move the chain link to the output chain */ cl = ctx->in; ctx->in = cl->next; *last_out = cl; last_out = &cl->next; cl->next = NULL; continue; } if (ctx->buf == NULL) { /* get the free buf */ if (ctx->free) { ctx->buf = ctx->free->buf; ctx->free = ctx->free->next; } else if (out || ctx->allocated == ctx->bufs.num) { break; } else { size = ctx->bufs.size; if (ctx->in->buf->last_buf) { if (bsize < (off_t) ctx->bufs.size) { /* * allocate small temp buf for the small last buf * or its small last part */ size = (size_t) bsize; } else if (ctx->bufs.num == 1 && (bsize < (off_t) (ctx->bufs.size + (ctx->bufs.size >> 2)))) { /* * allocate a temp buf that equals * to the last buf if the last buf size is lesser * than 1.25 of bufs.size and a temp buf is single */ size = (size_t) bsize; } } if (!(ctx->buf = ngx_create_temp_buf(ctx->pool, size))) { return NGX_ERROR; } ctx->buf->tag = ctx->tag; ctx->buf->recycled = 1; ctx->allocated++; } } rc = ngx_output_chain_copy_buf(ctx->buf, ctx->in->buf, ctx->sendfile); if (rc == NGX_ERROR) { return rc; } if (rc == NGX_AGAIN) { if (out) { break; } return rc; } /* delete the completed buf from the ctx->in chain */ if (ngx_buf_size(ctx->in->buf) == 0) { ctx->in = ctx->in->next; } if (!(cl = ngx_alloc_chain_link(ctx->pool))) { return NGX_ERROR; } cl->buf = ctx->buf; cl->next = NULL; *last_out = cl; last_out = &cl->next; ctx->buf = NULL; } if (out == NULL && last != NGX_NONE) { return last; } last = ctx->output_filter(ctx->filter_ctx, out); ngx_chain_update_chains(&ctx->free, &ctx->busy, &out, ctx->tag); last_out = &out; if (last == NGX_ERROR) { return last; } } } static ngx_inline ngx_int_t ngx_output_chain_need_to_copy(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf) { ngx_uint_t sendfile; if (ngx_buf_special(buf)) { return 0; } sendfile = ctx->sendfile; #if (NGX_SENDFILE_LIMIT) if (buf->in_file && buf->file_pos >= NGX_SENDFILE_LIMIT) { sendfile = 0; } #endif if (!sendfile) { if (!ngx_buf_in_memory(buf)) { return 1; } buf->in_file = 0; } if (ctx->need_in_memory && !ngx_buf_in_memory(buf)) { return 1; } if (ctx->need_in_temp && (buf->memory || buf->mmap)) { return 1; } return 0; } static ngx_int_t ngx_output_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, ngx_chain_t *in) { ngx_chain_t *cl, **ll; #if (NGX_SENDFILE_LIMIT) ngx_buf_t *b, *buf; #endif ll = chain; for (cl = *chain; cl; cl = cl->next) { ll = &cl->next; } while (in) { if (!(cl = ngx_alloc_chain_link(pool))) { return NGX_ERROR; } #if (NGX_SENDFILE_LIMIT) buf = in->buf; if (buf->in_file && buf->file_pos < NGX_SENDFILE_LIMIT && buf->file_last > NGX_SENDFILE_LIMIT) { if (!(b = ngx_calloc_buf(pool))) { return NGX_ERROR; } ngx_memcpy(b, buf, sizeof(ngx_buf_t)); if (ngx_buf_in_memory(buf)) { buf->pos += (ssize_t) (NGX_SENDFILE_LIMIT - buf->file_pos); b->last = buf->pos; } buf->file_pos = NGX_SENDFILE_LIMIT; b->file_last = NGX_SENDFILE_LIMIT; cl->buf = b; } else { cl->buf = buf; in = in->next; } #else cl->buf = in->buf; in = in->next; #endif *ll = cl; ll = &cl->next; } *ll = NULL; return NGX_OK; } static ngx_int_t ngx_output_chain_copy_buf(ngx_buf_t *dst, ngx_buf_t *src, ngx_uint_t sendfile) { off_t size; ssize_t n; size = ngx_buf_size(src); if (size > dst->end - dst->pos) { size = dst->end - dst->pos; } #if (NGX_SENDFILE_LIMIT) if (src->in_file && src->file_pos >= NGX_SENDFILE_LIMIT) { sendfile = 0; } #endif if (ngx_buf_in_memory(src)) { ngx_memcpy(dst->pos, src->pos, (size_t) size); src->pos += (size_t) size; dst->last += (size_t) size; if (src->in_file) { if (sendfile) { dst->in_file = 1; dst->file = src->file; dst->file_pos = src->file_pos; dst->file_last = src->file_pos + size; } else { dst->in_file = 0; } src->file_pos += size; } else { dst->in_file = 0; } if (src->last_buf && src->pos == src->last) { dst->last_buf = 1; } } else { n = ngx_read_file(src->file, dst->pos, (size_t) size, src->file_pos); if (n == NGX_ERROR) { return n; } #if (NGX_FILE_AIO_READ) if (n == NGX_AGAIN) { return n; } #endif if (n != size) { ngx_log_error(NGX_LOG_ALERT, src->file->log, 0, ngx_read_file_n " reads only %z of %O from file", n, size); if (n == 0) { return NGX_ERROR; } } dst->last += n; if (sendfile) { dst->in_file = 1; dst->file = src->file; dst->file_pos = src->file_pos; dst->file_last = src->file_pos + n; } else { dst->in_file = 0; } src->file_pos += n; if (src->last_buf && src->file_pos == src->file_last) { dst->last_buf = 1; } } return NGX_OK; } ngx_int_t ngx_chain_writer(void *data, ngx_chain_t *in) { ngx_chain_writer_ctx_t *ctx = data; off_t size; ngx_chain_t *cl; for (size = 0; in; in = in->next) { #if 1 if (ngx_buf_size(in->buf) == 0 && !ngx_buf_special(in->buf)) { ngx_debug_point(); } #endif size += ngx_buf_size(in->buf); ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->connection->log, 0, "chain writer buf size: %uz", ngx_buf_size(in->buf)); if (!(cl = ngx_alloc_chain_link(ctx->pool))) { return NGX_ERROR; } cl->buf = in->buf; cl->next = NULL; *ctx->last = cl; ctx->last = &cl->next; } ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->connection->log, 0, "chain writer in: %p", ctx->out); for (cl = ctx->out; cl; cl = cl->next) { #if 1 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { ngx_debug_point(); } #endif size += ngx_buf_size(cl->buf); } if (size == 0) { return NGX_OK; } ctx->out = ngx_send_chain(ctx->connection, ctx->out, ctx->limit); ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->connection->log, 0, "chain writer out: %p", ctx->out); if (ctx->out == NGX_CHAIN_ERROR) { return NGX_ERROR; } if (ctx->out == NULL) { ctx->last = &ctx->out; return NGX_OK; } return NGX_AGAIN; }