C++ (Cpp) ngx_http_file_cache_addの例

コード例 #1

ファイル: ngx_http_file_cache.c プロジェクト: feifei435/nginx-source-analysis

/*
 *	添加cache文件到file_cache中
 *	参数：	name是完整文件名称
 */
static ngx_int_t
ngx_http_file_cache_add_file(ngx_tree_ctx_t *ctx, ngx_str_t *name)
{
    u_char                 *p;
    ngx_int_t               n;
    ngx_uint_t              i;
    ngx_http_cache_t        c;
    ngx_http_file_cache_t  *cache;

	//	因为name是文件的完整路径名称，不应该仅是文件名的长度
    if (name->len < 2 * NGX_HTTP_CACHE_KEY_LEN) {
        return NGX_ERROR;
    }

	//	检查cache文件大小，cache文件中存放的内容至少包含file_cache_header_t结构大小
    if (ctx->size < (off_t) sizeof(ngx_http_file_cache_header_t)) {
        ngx_log_error(NGX_LOG_CRIT, ctx->log, 0,
                      "cache file \"%s\" is too small", name->data);
        return NGX_ERROR;
    }

    ngx_memzero(&c, sizeof(ngx_http_cache_t));
    cache = ctx->data;

    c.length = ctx->size;						//	???
    c.fs_size = (ctx->fs_size + cache->bsize - 1) / cache->bsize;		//	???

	//	将HEX格式的文件名转换为整数形式存放于 c.key 数组中
    p = &name->data[name->len - 2 * NGX_HTTP_CACHE_KEY_LEN];

    for (i = 0; i < NGX_HTTP_CACHE_KEY_LEN; i++) {
        n = ngx_hextoi(p, 2);

        if (n == NGX_ERROR) {
            return NGX_ERROR;
        }

        p += 2;

        c.key[i] = (u_char) n;
    }

    return ngx_http_file_cache_add(cache, &c);
}

コード例 #2

ファイル: ngx_http_file_cache.c プロジェクト: xdutaotao/u-nginx

static ngx_int_t
ngx_http_file_cache_add_file(ngx_tree_ctx_t *ctx, ngx_str_t *name)
{
    u_char                 *p;
    ngx_int_t               n;
    ngx_uint_t              i;
    ngx_http_cache_t        c;
    ngx_http_file_cache_t  *cache;

    if (name->len < 2 * NGX_HTTP_CACHE_KEY_LEN) {
        return NGX_ERROR;
    }

    if (ctx->size < (off_t) sizeof(ngx_http_file_cache_header_t)) {
        ngx_log_error(NGX_LOG_CRIT, ctx->log, 0,
                      "cache file \"%s\" is too small", name->data);
        return NGX_ERROR;
    }

    ngx_memzero(&c, sizeof(ngx_http_cache_t));
    cache = ctx->data;

    c.length = ctx->size;
    c.fs_size = (ctx->fs_size + cache->bsize - 1) / cache->bsize;

    p = &name->data[name->len - 2 * NGX_HTTP_CACHE_KEY_LEN];

    for (i = 0; i < NGX_HTTP_CACHE_KEY_LEN; i++) {
        n = ngx_hextoi(p, 2);

        if (n == NGX_ERROR) {
            return NGX_ERROR;
        }

        p += 2;

        c.key[i] = (u_char) n;
    }

    return ngx_http_file_cache_add(cache, &c);
}

コード例 #3

ファイル: ngx_http_file_cache.c プロジェクト: mlzboy/resys

static ngx_int_t
ngx_http_file_cache_add_file(ngx_tree_ctx_t *ctx, ngx_str_t *name)
{
    u_char                        *p;
    ngx_fd_t                       fd;
    ngx_int_t                      n;
    ngx_uint_t                     i;
    ngx_file_info_t                fi;
    ngx_http_cache_t               c;
    ngx_http_file_cache_t         *cache;
    ngx_http_file_cache_header_t   h;

    if (name->len < 2 * NGX_HTTP_CACHE_KEY_LEN) {
        return NGX_ERROR;
    }

    ngx_memzero(&c, sizeof(ngx_http_cache_t));

    fd = ngx_open_file(name->data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);

    if (fd == NGX_INVALID_FILE) {
        ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
                      ngx_open_file_n " \"%s\" failed", name->data);
        return NGX_ERROR;
    }

    c.file.fd = fd;
    c.file.name = *name;
    c.file.log = ctx->log;

    n = ngx_read_file(&c.file, (u_char *) &h,
                      sizeof(ngx_http_file_cache_header_t), 0);
    if (n == NGX_ERROR) {
        return NGX_ERROR;
    }

    if ((size_t) n < sizeof(ngx_http_file_cache_header_t)) {
        ngx_log_error(NGX_LOG_CRIT, ctx->log, 0,
                      "cache file \"%s\" is too small", name->data);
        return NGX_ERROR;
    }

    if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
        ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
                      ngx_fd_info_n " \"%s\" failed", name->data);

    } else {
        c.uniq = ngx_file_uniq(&fi);
        c.valid_sec = h.valid_sec;
        c.valid_msec = h.valid_msec;
        c.body_start = h.body_start;
        c.length = ngx_file_size(&fi);
    }

    if (ngx_close_file(fd) == NGX_FILE_ERROR) {
        ngx_log_error(NGX_LOG_ALERT, ctx->log, ngx_errno,
                      ngx_close_file_n " \"%s\" failed", name->data);
    }

    if (c.body_start == 0) {
        return NGX_ERROR;
    }

    p = &name->data[name->len - 2 * NGX_HTTP_CACHE_KEY_LEN];

    for (i = 0; i < NGX_HTTP_CACHE_KEY_LEN; i++) {
        n = ngx_hextoi(p, 2);

        if (n == NGX_ERROR) {
            return NGX_ERROR;
        }

        p += 2;

        c.key[i] = (u_char) n;
    }

    cache = ctx->data;

    return ngx_http_file_cache_add(cache, &c);
}