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我想从dotnet核心web api动作下载一个zip文件，但是我无法使它工作。我试着通过POSTMAN和我的Aurelia Http Fetch Client调用动作。如何从dotnet核心webapi下载ZipFile？
我能够像我想要的那样创建ZipFile并将其存储在系统中，但无法修复它，因此它通过api返回zipfile。
用例：用户选择几个图片集并单击下载按钮。图片集的id被发送到api，并且创建一个zipfile文件，其中包含用于保存图片的每个图片集的目录。该zipfile被返回给用户，以便他/她可以将其存储在他们的系统上。
任何帮助，将不胜感激。
我的控制器动作
/// <summary>
/// Downloads a collection of picture collections and their pictures
/// </summary>
/// <param name="ids">The ids of the collections to download</param>
/// <returns></returns>
[HttpPost("download")]
[ProducesResponseType(typeof(void), (int) HttpStatusCode.OK)]
public async Task<IActionResult> Download([FromBody] IEnumerable<int> ids)
{
// Create new zipfile
var zipFile = $"{_ApiSettings.Pictures.AbsolutePath}/collections_download_{Guid.NewGuid().ToString("N").Substring(0,5)}.zip";
using (var repo = new PictureCollectionsRepository())
using (var picturesRepo = new PicturesRepository())
using (var archive = ZipFile.Open(zipFile, ZipArchiveMode.Create))
{
foreach (var id in ids)
{
// Fetch collection and pictures
var collection = await repo.Get(id);
var pictures = await picturesRepo
.GetAll()
.Where(x => x.CollectionId == collection.Id)
.ToListAsync();
// Create collection directory IMPORTANT: the trailing slash
var directory = $"{collection.Number}_{collection.Name}_{collection.Date:yyyy-MM-dd}/";
archive.CreateEntry(directory);
// Add the pictures to the current collection directory
pictures.ForEach(x => archive.CreateEntryFromFile(x.FilePath, $"{directory}/{x.FileName}"));
}
}
// What to do here so it returns the just created zip file?
}
}
我奥里利亚获取客户端功能：
/**
* Downloads all pictures from the picture collections in the ids array
* @params ids The ids of the picture collections to download
*/
download(ids: Array<number>): Promise<any> {
return this.http.fetch(AppConfiguration.baseUrl + this.controller + 'download', {
method: 'POST',
body: json(ids)
})
}
我已经试过
需要注意的是什么，我已经试过呢不会产生错误，它似乎不是 做任何事。
1）创建我自己的FileResult（就像我以前用老版本的ASP.NET做的那样）。当我通过邮递员或应用程序调用它时，根本看不到正在使用的标题。
return new FileResult(zipFile, Path.GetFileName(zipFile), "application/zip");
public class FileResult : IActionResult
{
private readonly string _filePath;
private readonly string _contentType;
private readonly string _fileName;
public FileResult(string filePath, string fileName = "", string contentType = null)
{
if (filePath == null) throw new ArgumentNullException(nameof(filePath));
_filePath = filePath;
_contentType = contentType;
_fileName = fileName;
}
public Task ExecuteResultAsync(ActionContext context)
{
var response = new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new ByteArrayContent(System.IO.File.ReadAllBytes(_filePath))
};
if (!string.IsNullOrEmpty(_fileName))
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
{
FileName = _fileName
};
response.Content.Headers.ContentType = new MediaTypeHeaderValue(_contentType);
return Task.FromResult(response);
}
}
}
2）https://stackoverflow.com/a/34857134/2477872
不执行任何操作。
HttpContext.Response.ContentType = "application/zip";
var result = new FileContentResult(System.IO.File.ReadAllBytes(zipFile), "application/zip")
{
FileDownloadName = Path.GetFileName(zipFile)
};
return result;
我试过用一个测试虚拟PDF文件，这似乎与邮递员一起工作。但是，当我尝试将其更改为zip文件（请参阅上文）时，它什么都不做。
HttpContext.Response.ContentType = "application/pdf";
var result = new FileContentResult(System.IO.File.ReadAllBytes("THE PATH/test.pdf"), "application/pdf")
{
FileDownloadName = "test.pdf"
};
return result;