将 xml 文件上传到 Google Cloud Storage 时出错

Question

我想将文件上传到谷歌云存储，但是我收到如下错误：

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

我要上传到谷歌云存储的xml文件格式：

<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">

文件和谷歌存储桶，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());
    }

报错如下：

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。您可以查看有关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 的文件中。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，该函数将读取文件的数据并将它们返回到您的主函数，该函数会将数据上传到存储桶。

我自己和以下代码做了一些编码，成功上传了包含您上面提到的数据的文件。

---

读取文件的函数：

它将从本地存储中读取文件，例如Cloud Shell，它将返回所有数据。

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;
  }

---

上传功能：

它将使用将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。文档代码之间的区别在于调用...readFile().getBytes(UTF_8)... 的位置。我们添加了将返回所有数据以供上传的函数，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));
}