Question

我正在尝试使用JSON文件对Google Vision API进行身份验证。通常，我使用GOOGLE_APPLICATION_CREDENTIALS环境变量来指定JSON文件本身的路径。

但是，我需要在我的应用程序本身中指定它并使用JSON文件内容进行身份验证。

现在，我尝试指定CallSettings，然后将其作为参数传递给ImageAnnotatorClient.Create方法。果然，可以通过从JSON文件中读取身份验证信息来完美地创建CallSettings对象，但是将其作为参数传递给ImageAnnotatorClient似乎与ImageAnnotatorClient.Create方法没有区别仍在查找环境变量并抛出InvalidOperation异常，指定无法找到环境变量。

知道如何才能获得理想的行为吗？

Google Vision Docs

Answer 1

using System;
using Google.Apis.Auth.OAuth2;
using Google.Cloud.Vision.V1;
using Grpc.Auth;

namespace GoogleVision
{
    class Program
    {
        static void Main(string[] args)
        {
            string jsonPath = @"<path to .json credential file>";

            var credential = GoogleCredential.FromFile(jsonPath).CreateScoped(ImageAnnotatorClient.DefaultScopes);

            var channel = new Grpc.Core.Channel(ImageAnnotatorClient.DefaultEndpoint.ToString(), credential.ToChannelCredentials());

            var client = ImageAnnotatorClient.Create(channel);

            var image = Image.FromFile(@"<path to your image file>");

            var response = client.DetectLabels(image);

            foreach (var annotation in response)
            {
                if (annotation.Description != null)
                    Console.WriteLine(annotation.Description);
            }
        }
    }
}

Answer 2

var jsonPath = "<YOUR PATH>";

var imageAnnotatorClientBuilder = new ImageAnnotatorClientBuilder
{
    CredentialsPath = jsonPath
};

var client = imageAnnotatorClientBuilder.Build();

IReadOnlyList<EntityAnnotation> textAnnotations = client.DetectText(image);
foreach (EntityAnnotation text in textAnnotations)
{
    Console.WriteLine($"Description: {text.Description}");
}

Google Vision API指定JSON文件

2 个答案: