Google Vision API：存储桶不返回任何内容，并且 ImageAnnotator

Question

我有 Google Vision API 的代码。我将 Google 凭据作为路径和环境变量，但Page<Bucket> buckets = storage.list();不返回任何内容，并且出现错误 try (ImageAnnotatorClient client = ImageAnnotatorClient.create())这是代码： public static void main(String... args) throws Exception {        authExplicit("D:\\bp-mihalova\\2\\apikey.json");        detectLabels("D:\\bp-mihalova\\2\\Jellyfish.jpg", System.out);    }    public static void detectLabels(String filePath, PrintStream out) throws Exception, IOException {        List<AnnotateImageRequest> requests = new ArrayList<>();        ByteString imgBytes = ByteString.readFrom(new FileInputStream(filePath));        Image img = Image.newBuilder().setContent(imgBytes).build();        Feature feat = Feature.newBuilder().setType(Type.LABEL_DETECTION).build();        AnnotateImageRequest request =                AnnotateImageRequest.newBuilder().addFeatures(feat).setImage(img).build();        requests.add(request);        try (ImageAnnotatorClient client = ImageAnnotatorClient.create()) {            BatchAnnotateImagesResponse response = client.batchAnnotateImages(requests);            List<AnnotateImageResponse> responses = response.getResponsesList();            for (AnnotateImageResponse res : responses) {                if (res.hasError()) {                    out.printf("Error: %s\n", res.getError().getMessage());                    return;                }                // For full list of available annotations, see http://g.co/cloud/vision/docs                for (EntityAnnotation annotation : res.getLabelAnnotationsList()) {                    annotation.getAllFields().forEach((k, v) -> out.printf("%s : %s\n", k, v.toString()));                }            }        }    }

Answer 1

发生此错误是因为ImageAnnotatorClient client = ImageAnnotatorClient.create()需要在环境变量中设置默认凭据或服务帐户。

我使用以下代码成功完成了请求：

package com.example.vision;

import com.google.auth.oauth2.GoogleCredentials;

import java.io.FileInputStream;

import com.google.api.gax.paging.Page;

import com.google.cloud.storage.Bucket;

import com.google.cloud.storage.Storage;

import com.google.cloud.storage.StorageOptions;

import com.google.common.collect.Lists;

import java.io.IOException;

import java.io.PrintStream;

import com.google.cloud.vision.v1.ImageAnnotatorSettings;

import com.google.api.gax.core.FixedCredentialsProvider;

import com.google.cloud.vision.v1.AnnotateImageRequest;

import com.google.cloud.vision.v1.AnnotateImageResponse;

import com.google.cloud.vision.v1.BatchAnnotateImagesResponse;

import com.google.cloud.vision.v1.EntityAnnotation;

import com.google.cloud.vision.v1.Feature;

import com.google.cloud.vision.v1.Feature.Type;

import com.google.cloud.vision.v1.Image;

import com.google.cloud.vision.v1.ImageAnnotatorClient;

import com.google.protobuf.ByteString;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.ArrayList;

import java.util.List;

public class Sample {

 public static void main(String...args) throws Exception {

  String jsonPath = "../../key.json";

  authExplicit(jsonPath);

  detectLabels(jsonPath, "../wakeupcat.jpg", System.out);

 }

 static void authExplicit(String jsonPath) throws IOException {

  GoogleCredentials credentials = GoogleCredentials.fromStream(new FileInputStream(jsonPath))

   .createScoped(Lists.newArrayList("https://www.googleapis.com/auth/cloud-platform"));

  Storage storage = StorageOptions.newBuilder().setCredentials(credentials).build().getService();

  System.out.println("Buckets:");

  Page < Bucket > buckets = storage.list();

  for (Bucket bucket: buckets.iterateAll()) {

   System.out.println(bucket.toString());

  }

 }

 public static void detectLabels(String jsonPath, String filePath, PrintStream out) throws Exception, IOException {

  GoogleCredentials credentials = GoogleCredentials.fromStream(new FileInputStream(jsonPath))

   .createScoped(Lists.newArrayList("https://www.googleapis.com/auth/cloud-platform"));

  List < AnnotateImageRequest > requests = new ArrayList < > ();

  ByteString imgBytes = ByteString.readFrom(new FileInputStream(filePath));

  Image img = Image.newBuilder().setContent(imgBytes).build();

  Feature feat = Feature.newBuilder().setType(Type.LABEL_DETECTION).build();

  AnnotateImageRequest request =

   AnnotateImageRequest.newBuilder().addFeatures(feat).setImage(img).build();

  requests.add(request);

//Setting the credentials:

  ImageAnnotatorSettings imageAnnotatorSettings = ImageAnnotatorSettings.newBuilder()

   .setCredentialsProvider(FixedCredentialsProvider.create(credentials))

   .build();

  try (ImageAnnotatorClient client = ImageAnnotatorClient.create(imageAnnotatorSettings)) {

   BatchAnnotateImagesResponse response = client.batchAnnotateImages(requests);

   List < AnnotateImageResponse > responses = response.getResponsesList();

   for (AnnotateImageResponse res: responses) {

    if (res.hasError()) {

     out.printf("Error: %s\n", res.getError().getMessage());

     return;

    }

    // For full list of available annotations, see http://g.co/cloud/vision/docs

    for (EntityAnnotation annotation: res.getLabelAnnotationsList()) {

     annotation.getAllFields().forEach((k, v) -> out.printf("%s : %s\n", k, v.toString()));

    }

   }

  }

 }

}