java - 将 xml 文件上传到 Google Cloud Storage 时出现错误

Question

我想将文件上传到 Google Cloud Storage，但是收到如下错误:

java.lang.NoSuchMethodError: com.google.common.base.Preconditions.checkNotNull

我要上传到 Google Cloud Storage 的 xml 文件的格式:

<set xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">

文件和 Google 存储桶，我想将文件上传到存储桶。

字符串文件名=“data.xml”

String fileBucket = "上传文件";

 public static void uploadFile(String fileName, String fileBucket)
            throws IOException {
        final GcsService gcsService = GcsServiceFactory.createGcsService(new RetryParams.Builder()
                .initialRetryDelayMillis(10)
                .retryMaxAttempts(10)
                .totalRetryPeriodMillis(50000)//15000
                .build());
        gcsService.createOrReplace(
                new GcsFilename(fileBucket, fileName),
                new GcsFileOptions.Builder().mimeType("application/xml")
                        .acl("public-read")
                        .cacheControl("public, max-age=0").build());
    }

出现如下错误:

Jan 29, 2019 6:49:31 AM com.google.api.server.spi.SystemService invokeServiceMethod
SEVERE: exception occurred while calling backend method
java.lang.NoSuchMethodError: com.google.common.base.Preconditions.checkNotNull(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)Ljava/lang/Object;
    at com.google.appengine.tools.cloudstorage.GcsFileOptions$Builder.checkNotEmpty(GcsFileOptions.java:252)
    at com.google.appengine.tools.cloudstorage.GcsFileOptions$Builder.mimeType(GcsFileOptions.java:173)
    at com.vivoiz.healofy.backend.v2.helpers.utils.AppUtilities.uploadFileToGCS(AppUtilities.java:168)
    at com.vivoiz.healofy.backend.v2.apis.InternalApis.uploadFile(InternalApis.java:578)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.google.api.server.spi.SystemService.invokeServiceMethod(SystemService.java:351)
    at com.google.api.server.spi.handlers.EndpointsMethodHandler$RestHandler.handle(EndpointsMethodHandler.java:119)
    at com.google.api.server.spi.handlers.EndpointsMethodHandler$RestHandler.handle(EndpointsMethodHandler.java:102)
    at com.google.api.server.spi.dispatcher.PathDispatcher.dispatch(PathDispatcher.java:50)
    at com.google.api.server.spi.EndpointsServlet.service(EndpointsServlet.java:72)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:867)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1623)
    at com.googlecode.objectify.ObjectifyFilter.doFilter(ObjectifyFilter.java:48)
INFO     2019-01-29 06:49:31,105 module.py:861] v2: "GET /_ah/api/internalapis/v1/uploadFile HTTP/1.1" 503 454
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
    at com.google.appengine.tools.development.devappserver2.RequestIdFilter.doFilter(RequestIdFilter.java:36)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
    at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:134)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
    at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
    at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:48)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
    at com.google.appengine.tools.development.jetty9.StaticFileFilter.doFilter(StaticFileFilter.java:123)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
    at com.google.appengine.tools.development.jetty9.DevAppEngineWebAppContext.doScope(DevAppEngineWebAppContext.java:94)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
    at com.google.appengine.tools.development.jetty9.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:595)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
    at org.eclipse.jetty.server.Server.handle(Server.java:502)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
    at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:132)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
    at java.lang.Thread.run(Thread.java:748)

Answer 1

要将文件上传到 Google Cloud Storage，您需要 StorageOptions 服务。你可以查看关于Uploading Objects的文档。

这会将 Hello, Cloud Storage! 字符串上传到名为 bucket 的存储桶中名为 blob_name 的文件。您只需根据项目的需要更改名称即可。

上传您的本地文件之一。创建一个函数来读取文件的数据并将其返回到将数据上传到存储桶的主函数。

我自己编写了一些代码，并编写了以下代码，成功上传了包含您上面提到的数据的文件。

<小时/>

读取文件的函数:

它将从本地存储中读取文件，例如Cloud Shell 将返回所有数据。

private String readFile(){
      // The name of the file to open.
        String fileName = "PATH/TO/THE/FILE/THAT/IS/GOING/TO/BE/UPLOADED/FILE_NAME/xml";

        // This will reference one line at a time
        String line = null;
        // This will be the full file after reading
        String output = "";

        try {
            // FileReader reads text files in the default encoding.
            FileReader fileReader = 
                new FileReader(fileName);

            // Always wrap FileReader in BufferedReader.
            BufferedReader bufferedReader = 
                new BufferedReader(fileReader);

            while((line = bufferedReader.readLine()) != null) {
                System.out.println(line);
                output = output + line;
            }   

            // Always close files.
            bufferedReader.close();         
        }
        catch(FileNotFoundException ex) {
            System.out.println(
                output = output + "Unable to open file '" + fileName + "'";         
        }
        catch(IOException ex) {
            System.out.println( 
                output = output + "Error reading file '" + fileName + "'";         
        }

      return output;
  }

<小时/>

上传功能:

它将使用从文件中读取的所有数据并将它们上传到存储桶中的新文件。文档代码之间的差异在于调用 ...readFile().getBytes(UTF_8)... 的位置。我们添加将返回所有上传数据的函数，而不是字符串。

public String uploadFile(){

        String bucket_name = "BUCKET_NAME";
        String file_name = "PATH/TO/WHERE/THE/FILE/WILL/BE/UPLOADED/FILE_NAME.xml"

        Storage storage = StorageOptions.getDefaultInstance().getService();
        BlobId blobId = BlobId.of(bucket_name, file_name);
        BlobInfo blobInfo = BlobInfo.newBuilder(blobId).setContentType("text/plain").build();
        Blob blob = storage.create(blobInfo, readFile().getBytes(UTF_8));
}