[ResponseCache(Duration = 20)]//, VaryByQueryKeys = new string[] { "PageIndex", "PageSize" }
public async Task <ActionResult <ResponseColloctionResource <AuthorDto> > > GetAuthorsAsync([FromQuery] ResourcesParameters resourcesParameters)
{
//获取数据
var authors = await repositoryWrapper.Author.GetPageAsync(resourcesParameters);
#region 验证客户端缓冲
////验证客户端缓冲 和缓冲中间建分开用，可以考虑和imemorycache配合使用
//var authorHash = HashFactory.GetHash(authors);
//Response.Headers[HeaderNames.ETag] = authorHash;
//if (Request.Headers.TryGetValue(HeaderNames.IfNoneMatch, out var requestHash) && authorHash == requestHash)
//{
// return StatusCode(StatusCodes.Status304NotModified);
//}
//否则返回全部响应信息
#endregion
var name = System.Net.WebUtility.UrlEncode(resourcesParameters.AuthorName);
var pageData = new
{
pageIndex = authors.PageIndex,
pageSize = authors.PageSize,
totalPages = authors.TotalPages,
totalCount = authors.TotalCount,
previousLink = authors.HasPrevious ? Url.Link(nameof(GetAuthorsAsync), new { pageindex = resourcesParameters.PageIndex - 1, pageSize = resourcesParameters.PageSize, authorName = name }) : null,
nextLink = authors.HasNext ? Url.Link(nameof(GetAuthorsAsync), new { pageindex = resourcesParameters.PageIndex + 1, pageSize = resourcesParameters.PageSize, authorName = name }) : null,
authorName = name
};
var str = JsonConvert.SerializeObject((pageData));
Response.Headers.Add("PageMessage", JsonConvert.SerializeObject((pageData)));
var authorDtos = mapper.Map <IEnumerable <AuthorDto> >(authors);
var linkAuthorDtos = new ResponseColloctionResource <AuthorDto>(authorDtos.Select(author => CreateLinksForAuthor(author)).ToList());
return(CreateLinksForAuthors(linkAuthorDtos, pageData));
}
/// <summary>
/// 超文本驱动（实现HATEOAS 超媒体作为应用状态的引擎）
/// </summary>
/// <param name="author"></param>
/// <returns></returns>
private ResponseColloctionResource <AuthorDto> CreateLinksForAuthors(ResponseColloctionResource <AuthorDto> authors, dynamic pageData = null)
{
authors.Links.Add(new Link(HttpMethods.Post, "create a author", Url.Link(nameof(CreateAuthorAsync), null)));
if (pageData != null)
{
authors.Links.Add(new Link(HttpMethods.Get, "previous", pageData.previousLink));
authors.Links.Add(new Link(HttpMethods.Get, "next", pageData.nextLink));
}
return(authors);
}
