Question

我需要一个非常简单的API来允许发布某些键。这个密钥应该写在一个文件上，但是我在部署应用程序后遇到了麻烦，因为我可以在GET请求中读取该文件但是发布不起作用。

它给我的信息是

“detail”：“拒绝访问路径'.... \ Keys \ Keys.json'。”，

我用来写文件的代码：

        var path = "wwwroot/Keys/Keys.json";

        var result = new List <FireBaseKeysModel> ( );

        if (System.IO.File.Exists (path)) {
            var initialJson = System.IO.File.ReadAllText (path);
            var convertedJson =
                JsonConvert.DeserializeObject <List <FireBaseKeysModel>> (initialJson);
            try {
                result.AddRange (convertedJson);
            }
            catch  {
                //
            }

        }

        result.Add(new FireBaseKeysModel() {
            AccountId = accountId,
            AditionalInfo = addicionalInfo,
            DeviceInfo = deviceInfo,
            RegistrationKey = registrationKey,
            ClientId = clientId
        });

        var json = JsonConvert.SerializeObject (result.ToArray ( ));

        System.IO.File.WriteAllText (path, json);

无论如何，我可以在不需要更改服务器本身权限的情况下修复此问题吗？

Answer 1

如果不修改该文件夹的权限，就不应该有办法修复它。（因为您正在使用System.IO我假设这是Windows和IIS）。工作进程通常使用运行应用程序池的帐户。

默认情况下，此帐户应该只具有该文件夹的读取权限。没有给他，至少是写作许可，就没有办法解决它。

小偏离主题评论：我不会对wwwroot文件夹进行硬编码，因为该文件夹的名称是配置的对象，并且可以很好地更改，我将使用内置的IHostingEnvironment和依赖注入来获取路径：

private IHostingEnvironment _env;
public FooController(IHostingEnvironment env) {
    _env = env;
}

var webrootFolder = _env.WebRootPath

Answer 2

我有类似的任务，我需要登录用户＆＃39;上传文件并将其存储在服务器上。我选择将它们存储在文件夹结构wwwroot/uploads/{ environment }/{ username }/{ YYYY }/{ MM }/{ DD }/下。

我没有给出您问题的确切答案，但这些是您可能想要尝试的步骤。

启用静态文件使用

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    ......

    // With the usage of static file extensions, you shouldn't need to
    // set permissions to folders, if you decide to go with wwwroot.
    app.UseStaticFiles();

    ......
}

存储服务

public interface IStorageService
{
    Task<string> UploadAsync(string path, IFormFile content, string nameWithoutExtension = null);
}

public class LocalFileStorageService : IStorageService
{
    private readonly IHostingEnvironment _env;

    public LocalFileStorageService(IHostingEnvironment env)
    {
        _env = env;
    }

    public async Task<string> UploadAsync(string path, IFormFile content, string nameWithoutExtension = null)
    {
        if (content != null && content.Length > 0)
        {
            string extension = Path.GetExtension(content.FileName);

            // Never trust user's provided file name
            string fileName = $"{ nameWithoutExtension ?? Guid.NewGuid().ToString() }{ extension }";

            // Combine the path with web root and my folder of choice, 
            // "uploads" 
            path = Path.Combine(_env.WebRootPath, "uploads", path).ToLower();

            // If the path doesn't exist, create it.
            // In your case, you might not need it if you're going 
            // to make sure your `keys.json` file is always there.
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }

            // Combine the path with the file name
            string fullFileLocation = Path.Combine(path, fileName).ToLower();

            // If your case, you might just need to open your 
            // `keys.json` and append text on it.
            // Note that there is FileMode.Append too you might want to
            // take a look.
            using (var fileStream = new FileStream(fullFileLocation, FileMode.Create))
            {
               await Content.CopyToAsync(fileStream);
            }

            // I only want to get its relative path
            return fullFileLocation.Replace(_env.WebRootPath, 
                String.Empty, StringComparison.OrdinalIgnoreCase);
        }

        return String.Empty;
    }
}

如何使用Asp.Net core 2.0 Webapi写入wwwroot中的文件

2 个答案: