nginx 0.7.65 *) Security: now nginx/Windows ignores trailing spaces in URI. Thanks to Dan Crowley, Core Security Technologies. *) Security: now nginx/Windows ignores short files names. Thanks to Dan Crowley, Core Security Technologies. *) Change: now the "009" status code is written to an access log for proxied HTTP/0.9 responses. *) Change: now the default buffer size of the "large_client_header_buffers" directive is 8K. Thanks to Andrew Cholakian. *) Change: now default SSL ciphers are "HIGH:!ADH:!MD5". *) Change: now SSLv2 protocol is disabled by default. *) Change: now $host variable value is always low case. *) Feature: the conf/fastcgi.conf for simple FastCGI configurations. *) Feature: now URI part is not required a "proxy_pass" directive if variables are used. *) Feature: the $ssl_session_id variable. *) Bugfix: if a proxied or FastCGI request was internally redirected to another proxied or FastCGI location, then $upstream_response_time variable may have abnormally large value; the bug had appeared in 0.7.63. *) Bugfix: if the "expires modified" set date in the past, then a negative number was set in the "Cache-Control" response header line. Thanks to Alex Kapranoff. *) Bugfix: nginx closed a connection if a cached response had an empty body. Thanks to Piotr Sikora. *) Bugfix: nginx cached a 304 response if there was the "If-None-Match" header line in a proxied request. Thanks to Tim Dettrick and David Kostal. *) Bugfix: nginx did not treat a comma as separator in the "Cache-Control" backend response header line. *) Bugfix: cached HTTP/0.9 responses were handled incorrectly. *) Bugfix: nginx sent gzipped responses to clients those do not support gzip, if "gzip_static on" and "gzip_vary off"; the bug had appeared in 0.8.16. *) Bugfix: nginx always added "Content-Encoding: gzip" response header line in 304 responses sent by ngx_http_gzip_static_module. *) Bugfix: the "!-x" operator did not work. Thanks to Maxim Dounin. *) Bugfix: a segmentation fault might occur in a worker process, if limit_rate was used in HTTPS server. Thanks to Maxim Dounin. *) Bugfix: a segmentation fault might occur in a worker process while $limit_rate logging. Thanks to Maxim Dounin. *) Bugfix: nginx did not support dates in 2038 year on 32-bit platforms; *) Bugfix: nginx/Windows tried to delete a temporary file twice if the file should replace an already existent file. *) Bugfix: nginx/Windows tried to rename a temporary file twice if the file should replace an already existent file. *) Bugfix: nginx/Windows might not create temporary file, a cache file, or "proxy/fastcgi_store"d file if a worker had no enough access rights for top level directories. *) Bugfix: in UTF-8 encoding support by "try_files" directive in nginx/Windows. *) Bugfix: UTF-8 encoding usage in the ngx_http_autoindex_module. Thanks to Maxim Dounin. *) Bugfix: the ngx_http_autoindex_module did not show the trailing slash in links to a directory; the bug had appeared in 0.7.15. *) Bugfix: nginx did not close a log file set by the --error-log-path configuration option; the bug had appeared in 0.7.53. *) Bugfix: "addition_types" directive was incorrectly named "addtion_types". *) Bugfix: invalid request line in $request variable was written in access_log only if error_log was set to "info" or "debug" level.

/*
 * Copyright (C) Igor Sysoev
 */


#include <ngx_config.h>
#include <ngx_core.h>


ngx_buf_t *
ngx_create_temp_buf(ngx_pool_t *pool, size_t size)
{
    ngx_buf_t *b;

    b = ngx_calloc_buf(pool);
    if (b == NULL) {
        return NULL;
    }

    b->start = ngx_palloc(pool, size);
    if (b->start == NULL) {
        return NULL;
    }

    /*
     * set by ngx_calloc_buf():
     *
     *     b->file_pos = 0;
     *     b->file_last = 0;
     *     b->file = NULL;
     *     b->shadow = NULL;
     *     b->tag = 0;
     *     and flags
     */

    b->pos = b->start;
    b->last = b->start;
    b->end = b->last + size;
    b->temporary = 1;

    return b;
}


ngx_chain_t *
ngx_alloc_chain_link(ngx_pool_t *pool)
{
    ngx_chain_t  *cl;

    cl = pool->chain;

    if (cl) {
        pool->chain = cl->next;
        return cl;
    }

    cl = ngx_palloc(pool, sizeof(ngx_chain_t));
    if (cl == NULL) {
        return NULL;
    }

    return cl;
}


ngx_chain_t *
ngx_create_chain_of_bufs(ngx_pool_t *pool, ngx_bufs_t *bufs)
{
    u_char       *p;
    ngx_int_t     i;
    ngx_buf_t    *b;
    ngx_chain_t  *chain, *cl, **ll;

    p = ngx_palloc(pool, bufs->num * bufs->size);
    if (p == NULL) {
        return NULL;
    }

    ll = &chain;

    for (i = 0; i < bufs->num; i++) {

        b = ngx_calloc_buf(pool);
        if (b == NULL) {
            return NULL;
        }

        /*
         * set by ngx_calloc_buf():
         *
         *     b->file_pos = 0;
         *     b->file_last = 0;
         *     b->file = NULL;
         *     b->shadow = NULL;
         *     b->tag = 0;
         *     and flags
         *
         */

        b->pos = p;
        b->last = p;
        b->temporary = 1;

        b->start = p;
        p += bufs->size;
        b->end = p;

        cl = ngx_alloc_chain_link(pool);
        if (cl == NULL) {
            return NULL;
        }

        cl->buf = b;
        *ll = cl;
        ll = &cl->next;
    }

    *ll = NULL;

    return chain;
}


ngx_int_t
ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, ngx_chain_t *in)
{
    ngx_chain_t  *cl, **ll;

    ll = chain;

    for (cl = *chain; cl; cl = cl->next) {
        ll = &cl->next;
    }

    while (in) {
        cl = ngx_alloc_chain_link(pool);
        if (cl == NULL) {
            return NGX_ERROR;
        }

        cl->buf = in->buf;
        *ll = cl;
        ll = &cl->next;
        in = in->next;
    }

    *ll = NULL;

    return NGX_OK;
}


ngx_chain_t *
ngx_chain_get_free_buf(ngx_pool_t *p, ngx_chain_t **free)
{
    ngx_chain_t  *cl;

    if (*free) {
        cl = *free;
        *free = cl->next;
        cl->next = NULL;
        return cl;
    }

    cl = ngx_alloc_chain_link(p);
    if (cl == NULL) {
        return NULL;
    }

    cl->buf = ngx_calloc_buf(p);
    if (cl->buf == NULL) {
        return NULL;
    }

    cl->next = NULL;

    return cl;
}


void
ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy,
    ngx_chain_t **out, ngx_buf_tag_t tag)
{
    ngx_chain_t  *cl;

    if (*busy == NULL) {
        *busy = *out;

    } else {
        for (cl = *busy; cl->next; cl = cl->next) { /* void */ }

        cl->next = *out;
    }

    *out = NULL;

    while (*busy) {
        if (ngx_buf_size((*busy)->buf) != 0) {
            break;
        }

        if ((*busy)->buf->tag != tag) {
            *busy = (*busy)->next;
            continue;
        }

        (*busy)->buf->pos = (*busy)->buf->start;
        (*busy)->buf->last = (*busy)->buf->start;

        cl = *busy;
        *busy = cl->next;
        cl->next = *free;
        *free = cl;
    }
}