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

  1. private Map<URL, Long> getSizes() throws IOException {
  2.   Map<URL, Long> result = new HashMap<>();
  3.   int current = 1;
  4.   int total = urlToTargetMap.size();
  5.   for (URL url: urlToTargetMap.keySet()) {
  6.     progressListener.onSizeMetadataProgress(current, total);
  7.     URLConnection conn = url.openConnection();
  8.     result.put(url, conn.getContentLengthLong());
  9.     current++;
  10.   }
  11.   return result;
  12. }

代码示例来源：origin: line/armeria

  1. @Override
  2. public HttpFileAttributes readAttributes() throws IOException {
  3.   if (attrs == null) {
  4.     final URLConnection conn = url.openConnection();
  5.     final long length = conn.getContentLengthLong();
  6.     final long lastModifiedMillis = conn.getLastModified();
  7.     attrs = new HttpFileAttributes(length, lastModifiedMillis);
  8.   }
  9.   return attrs;
  10. }

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

  1. @Override
  2. public long contentLength() throws IOException {
  3.   URL url = getURL();
  4.   if (ResourceUtils.isFileURL(url)) {
  5.     // Proceed with file system resolution
  6.     File file = getFile();
  7.     long length = file.length();
  8.     if (length == 0L && !file.exists()) {
  9.       throw new FileNotFoundException(getDescription() +
  10.           " cannot be resolved in the file system for checking its content length");
  11.     }
  12.     return length;
  13.   }
  14.   else {
  15.     // Try a URL connection content-length header
  16.     URLConnection con = url.openConnection();
  17.     customizeConnection(con);
  18.     return con.getContentLengthLong();
  19.   }
  20. }

代码示例来源：origin: jooby-project/jooby

  1. private static Supplier attr(final URL resource, final BiConsumer<Long, Long> attrs)
  2.   throws Exception {
  3.  if ("file".equals(resource.getProtocol())) {
  4.   File file = new File(resource.toURI());
  5.   if (file.exists() && file.isFile()) {
  6.    attrs.accept(file.length(), file.lastModified());
  7.    return () -> new FileInputStream(file);
  8.   }
  9.   return null;
  10.  } else {
  11.   URLConnection cnn = resource.openConnection();
  12.   cnn.setUseCaches(false);
  13.   attrs.accept(cnn.getContentLengthLong(), cnn.getLastModified());
  14.   try {
  15.    Closeables.closeQuietly(cnn.getInputStream());
  16.   } catch (NullPointerException ex) {
  17.    // dir entries throw NPE :S
  18.    return null;
  19.   }
  20.   return () -> resource.openStream();
  21.  }
  22. }

代码示例来源：origin: wildfly/wildfly

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

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

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

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

  1. /**
  2.  * Immediately opens a connection to the given URL to retrieve
  3.  * data about the connection, including the input stream.
  4.  *
  5.  * @param url The URL to resource
  6.  */
  7. public StreamedFile(URL url) {
  8.   String path = url.getPath();
  9.   int idx = path.lastIndexOf(File.separatorChar);
  10.   this.name = idx > -1 ? path.substring(idx + 1) : path;
  11.   this.mediaType = MediaType.forFilename(name);
  12.   try {
  13.     URLConnection con = url.openConnection();
  14.     this.lastModified = con.getLastModified();
  15.     this.inputStream = con.getInputStream();
  16.     this.length = con.getContentLengthLong();
  17.   } catch (IOException e) {
  18.     throw new CustomizableResponseTypeException("Could not open a connection to the URL: " + path, e);
  19.   }
  20. }

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

  1. @Override
  2. public long lastModified() throws IOException {
  3.   URL url = getURL();
  4.   boolean fileCheck = false;
  5.   if (ResourceUtils.isFileURL(url) || ResourceUtils.isJarURL(url)) {
  6.     // Proceed with file system resolution
  7.     fileCheck = true;
  8.     try {
  9.       File fileToCheck = getFileForLastModifiedCheck();
  10.       long lastModified = fileToCheck.lastModified();
  11.       if (lastModified > 0L || fileToCheck.exists()) {
  12.         return lastModified;
  13.       }
  14.     }
  15.     catch (FileNotFoundException ex) {
  16.       // Defensively fall back to URL connection check instead
  17.     }
  18.   }
  19.   // Try a URL connection last-modified header
  20.   URLConnection con = url.openConnection();
  21.   customizeConnection(con);
  22.   long lastModified = con.getLastModified();
  23.   if (fileCheck && lastModified == 0 && con.getContentLengthLong() <= 0) {
  24.     throw new FileNotFoundException(getDescription() +
  25.         " cannot be resolved in the file system for checking its last-modified timestamp");
  26.   }
  27.   return lastModified;
  28. }

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

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

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

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

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

  1. @Override
  2. public long contentLength() throws IOException {
  3.   URL url = getURL();
  4.   if (ResourceUtils.isFileURL(url)) {
  5.     // Proceed with file system resolution
  6.     File file = getFile();
  7.     long length = file.length();
  8.     if (length == 0L && !file.exists()) {
  9.       throw new FileNotFoundException(getDescription() +
  10.           " cannot be resolved in the file system for checking its content length");
  11.     }
  12.     return length;
  13.   }
  14.   else {
  15.     // Try a URL connection content-length header
  16.     URLConnection con = url.openConnection();
  17.     customizeConnection(con);
  18.     return con.getContentLengthLong();
  19.   }
  20. }

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

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

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

  1. @Override
  2. public long lastModified() throws IOException {
  3.   URL url = getURL();
  4.   boolean fileCheck = false;
  5.   if (ResourceUtils.isFileURL(url) || ResourceUtils.isJarURL(url)) {
  6.     // Proceed with file system resolution
  7.     fileCheck = true;
  8.     try {
  9.       File fileToCheck = getFileForLastModifiedCheck();
  10.       long lastModified = fileToCheck.lastModified();
  11.       if (lastModified > 0L || fileToCheck.exists()) {
  12.         return lastModified;
  13.       }
  14.     }
  15.     catch (FileNotFoundException ex) {
  16.       // Defensively fall back to URL connection check instead
  17.     }
  18.   }
  19.   // Try a URL connection last-modified header
  20.   URLConnection con = url.openConnection();
  21.   customizeConnection(con);
  22.   long lastModified = con.getLastModified();
  23.   if (fileCheck && lastModified == 0 && con.getContentLengthLong() <= 0) {
  24.     throw new FileNotFoundException(getDescription() +
  25.         " cannot be resolved in the file system for checking its last-modified timestamp");
  26.   }
  27.   return lastModified;
  28. }

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

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

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

  1. public long getSize() {
  2.     final long len = connection.getContentLengthLong();
  3.     return len == -1 ? 0 : len;
  4.   }
  5. }

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

  1. @Override
  2. public long getContentLengthLong() {
  3.   return wrappedJarUrlConnection.getContentLengthLong();
  4. }

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

  1. public UrlInputStreamContent(String type, URL url) throws IOException {
  2.  super(type);
  3.  this.url = url;
  4.  this.urlConnection = url.openConnection();
  5.  this.length =
  6.    urlConnection.getContentLengthLong() == -1L ? 0L : urlConnection.getContentLengthLong();
  7. }

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

  1. @Override
  2. public long length() {
  3.   try {
  4.     return url.openConnection().getContentLengthLong();
  5.   } catch (IOException e) {
  6.     throw new IllegalStateException(e);
  7.   }
  8. }

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

  1. @Override
  2. public long getFileSize(String path, boolean virtual) throws IOException {
  3.   long fileSize = -1;
  4.   try {
  5.     URLConnection urlConnection = getURLConnection(path, virtual);
  6.     fileSize = urlConnection.getContentLengthLong();
  7.   } catch (IOException e) {
  8.     // Ignore this. It will always fail for non-file based includes
  9.   }
  10.   return fileSize;
  11. }

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

  1. @Test(expected = NetworkReactiveAuditException.class)
  2. public void getContentLengthLong()
  3.     throws IOException
  4. {
  5.   Assume.assumeTrue(IOTestTools.isNetworkConnected());
  6.   ReactiveAudit.off.commit();
  7.   URLConnection conn = new URL("http://" + HOST + ":" + PORT).openConnection();
  8.   TestTools.strict.commit();
  9.   conn.getContentLengthLong();
  10. }

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