java.net.URLConnection.getContentLengthLong()方法的使用及代码示例

x33g5p2x  于2022-01-31 转载在 其他  
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本文整理了Java中java.net.URLConnection.getContentLengthLong()方法的一些代码示例，展示了URLConnection.getContentLengthLong()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。URLConnection.getContentLengthLong()方法的具体详情如下：
包路径：java.net.URLConnection
类名称：URLConnection
方法名：getContentLengthLong

URLConnection.getContentLengthLong介绍

[英]Returns the value of the content-length header field as a long.
[中]将content-length标题字段的值作为长字符串返回。

代码示例

代码示例来源：origin: MovingBlocks/Terasology

private Map<URL, Long> getSizes() throws IOException {
  Map<URL, Long> result = new HashMap<>();
  int current = 1;
  int total = urlToTargetMap.size();
  for (URL url: urlToTargetMap.keySet()) {
    progressListener.onSizeMetadataProgress(current, total);
    URLConnection conn = url.openConnection();
    result.put(url, conn.getContentLengthLong());
    current++;
  }
  return result;
}

代码示例来源：origin: line/armeria

@Override
public HttpFileAttributes readAttributes() throws IOException {
  if (attrs == null) {
    final URLConnection conn = url.openConnection();
    final long length = conn.getContentLengthLong();
    final long lastModifiedMillis = conn.getLastModified();
    attrs = new HttpFileAttributes(length, lastModifiedMillis);
  }
  return attrs;
}

代码示例来源：origin: spring-projects/spring-framework

@Override
public long contentLength() throws IOException {
  URL url = getURL();
  if (ResourceUtils.isFileURL(url)) {
    // Proceed with file system resolution
    File file = getFile();
    long length = file.length();
    if (length == 0L && !file.exists()) {
      throw new FileNotFoundException(getDescription() +
          " cannot be resolved in the file system for checking its content length");
    }
    return length;
  }
  else {
    // Try a URL connection content-length header
    URLConnection con = url.openConnection();
    customizeConnection(con);
    return con.getContentLengthLong();
  }
}

代码示例来源：origin: jooby-project/jooby

private static Supplier attr(final URL resource, final BiConsumer<Long, Long> attrs)
  throws Exception {
 if ("file".equals(resource.getProtocol())) {
  File file = new File(resource.toURI());
  if (file.exists() && file.isFile()) {
   attrs.accept(file.length(), file.lastModified());
   return () -> new FileInputStream(file);
  }
  return null;
 } else {
  URLConnection cnn = resource.openConnection();
  cnn.setUseCaches(false);
  attrs.accept(cnn.getContentLengthLong(), cnn.getLastModified());
  try {
   Closeables.closeQuietly(cnn.getInputStream());
  } catch (NullPointerException ex) {
   // dir entries throw NPE :S
   return null;
  }
  return () -> resource.openStream();
 }
}

代码示例来源：origin: wildfly/wildfly

lastModified = new Date(connection.getLastModified());
  contentLength = connection.getContentLengthLong();
} finally {
  if (connection != null) {

代码示例来源：origin: spring-projects/spring-framework

long contentLength = con.getContentLengthLong();
if (contentLength > 0) {
  return true;

代码示例来源：origin: micronaut-projects/micronaut-core

/**
 * Immediately opens a connection to the given URL to retrieve
 * data about the connection, including the input stream.
 *
 * @param url The URL to resource
 */
public StreamedFile(URL url) {
  String path = url.getPath();
  int idx = path.lastIndexOf(File.separatorChar);
  this.name = idx > -1 ? path.substring(idx + 1) : path;
  this.mediaType = MediaType.forFilename(name);
  try {
    URLConnection con = url.openConnection();
    this.lastModified = con.getLastModified();
    this.inputStream = con.getInputStream();
    this.length = con.getContentLengthLong();
  } catch (IOException e) {
    throw new CustomizableResponseTypeException("Could not open a connection to the URL: " + path, e);
  }
}

代码示例来源：origin: spring-projects/spring-framework

@Override
public long lastModified() throws IOException {
  URL url = getURL();
  boolean fileCheck = false;
  if (ResourceUtils.isFileURL(url) || ResourceUtils.isJarURL(url)) {
    // Proceed with file system resolution
    fileCheck = true;
    try {
      File fileToCheck = getFileForLastModifiedCheck();
      long lastModified = fileToCheck.lastModified();
      if (lastModified > 0L || fileToCheck.exists()) {
        return lastModified;
      }
    }
    catch (FileNotFoundException ex) {
      // Defensively fall back to URL connection check instead
    }
  }
  // Try a URL connection last-modified header
  URLConnection con = url.openConnection();
  customizeConnection(con);
  long lastModified = con.getLastModified();
  if (fileCheck && lastModified == 0 && con.getContentLengthLong() <= 0) {
    throw new FileNotFoundException(getDescription() +
        " cannot be resolved in the file system for checking its last-modified timestamp");
  }
  return lastModified;
}

代码示例来源：origin: spring-projects/spring-framework

if (con.getContentLengthLong() > 0) {
  return true;

代码示例来源：origin: micronaut-projects/micronaut-core

if (con.getContentLengthLong() >= 0) {
  return true;

代码示例来源：origin: org.springframework/spring-core

@Override
public long contentLength() throws IOException {
  URL url = getURL();
  if (ResourceUtils.isFileURL(url)) {
    // Proceed with file system resolution
    File file = getFile();
    long length = file.length();
    if (length == 0L && !file.exists()) {
      throw new FileNotFoundException(getDescription() +
          " cannot be resolved in the file system for checking its content length");
    }
    return length;
  }
  else {
    // Try a URL connection content-length header
    URLConnection con = url.openConnection();
    customizeConnection(con);
    return con.getContentLengthLong();
  }
}

代码示例来源：origin: org.springframework/spring-core

long contentLength = con.getContentLengthLong();
if (contentLength > 0) {
  return true;

代码示例来源：origin: org.springframework/spring-core

@Override
public long lastModified() throws IOException {
  URL url = getURL();
  boolean fileCheck = false;
  if (ResourceUtils.isFileURL(url) || ResourceUtils.isJarURL(url)) {
    // Proceed with file system resolution
    fileCheck = true;
    try {
      File fileToCheck = getFileForLastModifiedCheck();
      long lastModified = fileToCheck.lastModified();
      if (lastModified > 0L || fileToCheck.exists()) {
        return lastModified;
      }
    }
    catch (FileNotFoundException ex) {
      // Defensively fall back to URL connection check instead
    }
  }
  // Try a URL connection last-modified header
  URLConnection con = url.openConnection();
  customizeConnection(con);
  long lastModified = con.getLastModified();
  if (fileCheck && lastModified == 0 && con.getContentLengthLong() <= 0) {
    throw new FileNotFoundException(getDescription() +
        " cannot be resolved in the file system for checking its last-modified timestamp");
  }
  return lastModified;
}

代码示例来源：origin: org.springframework/spring-core

if (con.getContentLengthLong() > 0) {
  return true;

代码示例来源：origin: org.jboss.modules/jboss-modules

public long getSize() {
    final long len = connection.getContentLengthLong();
    return len == -1 ? 0 : len;
  }
}

代码示例来源：origin: org.apache.tomcat/tomcat-catalina

@Override
public long getContentLengthLong() {
  return wrappedJarUrlConnection.getContentLengthLong();
}

代码示例来源：origin: com.google.enterprise.cloudsearch/google-cloudsearch-indexing-connector-sdk

public UrlInputStreamContent(String type, URL url) throws IOException {
 super(type);
 this.url = url;
 this.urlConnection = url.openConnection();
 this.length =
   urlConnection.getContentLengthLong() == -1L ? 0L : urlConnection.getContentLengthLong();
}

代码示例来源：origin: com.github.subchen/jetbrick-commons

@Override
public long length() {
  try {
    return url.openConnection().getContentLengthLong();
  } catch (IOException e) {
    throw new IllegalStateException(e);
  }
}

代码示例来源：origin: org.apache.tomcat/tomcat-catalina

@Override
public long getFileSize(String path, boolean virtual) throws IOException {
  long fileSize = -1;
  try {
    URLConnection urlConnection = getURLConnection(path, virtual);
    fileSize = urlConnection.getContentLengthLong();
  } catch (IOException e) {
    // Ignore this. It will always fail for non-file based includes
  }
  return fileSize;
}

代码示例来源：origin: octo-online/reactive-audit

@Test(expected = NetworkReactiveAuditException.class)
public void getContentLengthLong()
    throws IOException
{
  Assume.assumeTrue(IOTestTools.isNetworkConnected());
  ReactiveAudit.off.commit();
  URLConnection conn = new URL("http://" + HOST + ":" + PORT).openConnection();
  TestTools.strict.commit();
  conn.getContentLengthLong();
}

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