Azure 函数发布

Question

我尝试发布 Azure Function v.2，但收到错误:

The function runtime is unable to start. Microsoft.Extensions.Configuration.FileExtensions: The configuration file 'local.settings.json' was not found and is not optional. The physical path is 'D:\Program Files (x86)\SiteExtensions\Functions\2.0.12961\32bit\local.settings.json'.

我有以下配置:

<None Update="local.settings.json">
  <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
  <CopyToPublishDirectory>Always</CopyToPublishDirectory>
</None>

我在 Kudu 中看到了这个文件。

如何解决？

添加:

我尝试创建另一个文件，名为 config.json:

{
  "FtpSettings": {
    "FtpServer": "ftp://address/out",
    "FtpLogin": "login",
    "FtpPassword": "pass"
  }
}

然后尝试阅读它:

        var config = new ConfigurationBuilder()
            .AddJsonFile("config.json", optional: true, reloadOnChange: true)
            .AddEnvironmentVariables()
            .Build();

        builder.Services.AddTransient<FtpService.IFtpService>(s => new FtpService.Core.FtpService(
            address: config.GetSection("FtpSettings:FtpServer").Value,
            username: config.GetSection("FtpSettings:FtpLogin").Value,
            password: config.GetSection("FtpSettings:FtpPassword").Value
            ));

所以，我的 Startup 类是:

[assembly: FunctionsStartup(typeof(FunctionAppEfsGetFilesFromFtp.Startup))]
namespace FunctionAppEfsGetFilesFromFtp
{
    public class Startup : FunctionsStartup
    {
        public override void Configure(IFunctionsHostBuilder builder)
        {
            var config = new ConfigurationBuilder()
                .AddJsonFile("config.json", optional: true, reloadOnChange: true)
                .AddEnvironmentVariables()
                .Build();

            builder.Services.AddTransient<FtpService.IFtpService>(s => new FtpService.Core.FtpService(
                address: config.GetSection("FtpSettings:FtpServer").Value,
                username: config.GetSection("FtpSettings:FtpLogin").Value,
                password: config.GetSection("FtpSettings:FtpPassword").Value
                ));
        }
    }
}

但也无法读取

Answer 1

根据docs :

By default, these settings are not migrated automatically when the project is published to Azure.

因此 local.settings.json 不包含在部署过程中。建议的方法是使用环境变量。解决方法是将文件命名为其他名称，然后从路径读取文件并将其解析为 json 对象。