Java HttpURLConnection.getHeaderFields方法代码示例

import java.net.HttpURLConnection; //导入方法依赖的package包/类
/**
 * 登陆获取 Cookie
 *
 * @param username
 * @param password
 * @return
 * @throws Exception
 */
private String postLogin(String username, String password) throws Exception {
    String meCookie = null;//(String) memcachedManager.get("PLX_" + username + "_" + password);
    if (meCookie != null && !meCookie.equals("")) {
        this.Cookie = meCookie;
        return meCookie;
    }
    URL url = new URL(PLX + "/WebRoot/LoginAction.do");
    HttpURLConnection con = (HttpURLConnection) url.openConnection();
    con.setRequestMethod("POST");
    con.setDoOutput(true);
    con.setDoInput(true);
    con.setUseCaches(false);

    con.setRequestProperty("Content-Type",
            "application/x-www-form-urlencoded; text/html; charset=UTF-8");
    con.setConnectTimeout(1000);
    con.setReadTimeout(3000);
    OutputStreamWriter osw = new OutputStreamWriter(con.getOutputStream(), "UTF-8");
    osw.write("activity=login&userId=" + username + "&password=" + password);
    osw.flush();
    osw.close();
    /////////////
    //从请求中获取cookie列表
    String cookieskey = "Set-Cookie";
    Map<String, List<String>> maps = con.getHeaderFields();
    List<String> coolist = maps.get(cookieskey);
    Iterator<String> it = coolist.iterator();
    StringBuffer sbu = new StringBuffer();
    while (it.hasNext()) {
        sbu.append(it.next() + ";");
    }
    String cookies = sbu.toString();
    cookies = cookies.substring(0, cookies.length() - 1);
    this.Cookie = cookies;
    //memcachedManager.set("PLX_" + username + "_" + password, cookies, 300);
    return cookies;
}
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
private Response createResponse(HttpURLConnection connection,
		boolean newline) throws IOException {
	int code = connection.getResponseCode();
	InputStream inputStream = null;
	String body = null;
	String contentType = connection.getHeaderField("content-type");
	String useCharset = getCharsetFromContentType(contentType);
	
	//取reponse取得的chsetat為null時，採用預設的charset
	if(useCharset == null){
		useCharset = mReadCharset;
	}
	
	try {
		inputStream = getInputStream(connection);
		body = readString(inputStream, useCharset, newline);
	} catch (IOException e) {
		e.printStackTrace();
		inputStream = getErrorStream(connection);
		body = readString(inputStream, useCharset, newline);
	}

	return new Response(code, body, connection.getHeaderFields());
}
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
static void printHttpHeaders(
    HttpURLConnection connection 
   ) {
    Map<String, List<String>> headers = connection.getHeaderFields();
    Set<String> keys = headers.keySet();
    Iterator<String> itr = keys.iterator();
    while( itr.hasNext() )
    {
    	String key = itr.next();
    	List<String> values = headers.get( key );
    	StringBuffer sb = new StringBuffer();
    	sb.append(  key ).append( ":" );
    	Iterator<String> itrV = values.iterator();
    	while( itrV.hasNext() ) sb.append( " " ).append( itrV.next() );
    	System.out.println( sb );
    }
}
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
@SmallTest
@Feature({"Cronet"})
@OnlyRunCronetHttpURLConnection
// Test that Cronet strips content-encoding header.
public void testStripContentEncoding() throws Exception {
    URL url = new URL(NativeTestServer.getFileURL("/gzipped.html"));
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    assertEquals("foo", connection.getHeaderFieldKey(0));
    assertEquals("bar", connection.getHeaderField(0));
    assertEquals(null, connection.getHeaderField("content-encoding"));
    Map<String, List<String>> responseHeaders = connection.getHeaderFields();
    assertEquals(1, responseHeaders.size());
    assertEquals(200, connection.getResponseCode());
    assertEquals("OK", connection.getResponseMessage());
    // Make sure Cronet decodes the gzipped content.
    assertEquals("Hello, World!", TestUtil.getResponseAsString(connection));
    connection.disconnect();
}
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
/**
 * getCookie
 * 
 * @param conn
 * @return
 */
public static String getCookie(HttpURLConnection conn) {

    Map<String, List<String>> resHeaders = conn.getHeaderFields();
    StringBuffer sBuffer = new StringBuffer();
    for (Map.Entry<String, List<String>> entry : resHeaders.entrySet()) {
        String name = entry.getKey();
        if (name == null)
            continue; // http/1.1 line
        List<String> values = entry.getValue();
        if (name.equalsIgnoreCase("Set-Cookie")) {
            for (String value : values) {
                if (value == null) {
                    continue;
                }
                String cookie = value.substring(0, value.indexOf(";") + 1);
                sBuffer.append(cookie);
            }
        }
    }
    if (sBuffer.length() > 0) {
        return sBuffer.toString();
    }
    return sBuffer.toString();
}
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
protected void
getRequestProperties(
	HttpURLConnection		con )
{
	try{
		setProperty( ResourceDownloader.PR_STRING_CONTENT_TYPE, con.getContentType() );

		Map	headers = con.getHeaderFields();

		Iterator it = headers.entrySet().iterator();

		while( it.hasNext()){

			Map.Entry	entry = (Map.Entry)it.next();

			String	key = (String)entry.getKey();
			Object	val	= entry.getValue();

			if ( key != null ){

				setProperty( "URL_" + key, val );
			}
		}
	}catch( Throwable e ){

		Debug.printStackTrace(e);
	}
}
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
/**
 * Reads the raw response from a server.
 * @param connection the HttpURLConnection to read the raw response from.
 * @return The raw response from the server.
 * @throws IOException if an IOException occurs.
 */
public static synchronized String readRaw(HttpURLConnection connection) throws IOException
{
	connection.connect();
	Map<String,List<String>> headMap = connection.getHeaderFields();
	String raw = "";
	//A status line which includes the status code and reason message
	// (e.g., HTTP/1.1 200 OK).
	raw += connection.getHeaderField(null)+'\n';
	//Response header fields
	for(String head : headMap.keySet())
	{
		if(head==null)
			continue;
		raw += head + ": ";
		List<String> vals = headMap.get(head);
		//Response header field values (e.g., Content-Type: text/html).
		for(String v : vals)
			raw += v;
		raw += '\n';
	}
	//An empty line.
	raw += '\n';
	//An optional message body.
	raw += read(connection);
	return raw;
}
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
/**
 * 通过http的HEAD方式获取url返回的http响应头
 *
 * @param url 资源URL
 * @return 响应头封装在Map中
 * @throws IOException IO异常
 */
public static Map<String, List<String>> getHeaderFields(String url) throws IOException {
	HttpURLConnection conn = null;
	try {
		conn = getHttpURLConnection(url);
		// Request Method
		conn.setRequestMethod("HEAD");
		return conn.getHeaderFields();
	} finally {
		if (conn != null) {
			conn.disconnect();
		}
	}
}
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
public Response(HttpURLConnection connection) throws IOException {
    this.code = connection.getResponseCode();
    this.contentLength = connection.getContentLength();
    this.contentType = connection.getContentType();
    this.headers = connection.getHeaderFields();
    this.data = ByteStreams.toByteArray(connection.getInputStream());
}
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
private Response toResponse(HttpURLConnection conn) throws IOException {
    int responseCode = conn.getResponseCode();
    InputStream bodyStream;
    if (responseCode >= 400 || responseCode == -1) {
        bodyStream = conn.getErrorStream();
    } else {
        bodyStream = conn.getInputStream();
    }
    interceptResponse(conn);
    return new Response(responseCode, bodyStream, conn.getHeaderFields(), conn.getContentLength());
}
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
@GET
   @Produces(MediaType.APPLICATION_JSON)
   @Path("bubble/{urn}/thumbnail")
   public Response bubbleThumbnail(
   	@Context HttpServletRequest request,
   	@PathParam("urn") String urn 
) 
	throws IOException, 
	       URISyntaxException 
   {
   	APIImpl impl = getAPIImpl( request );
   	if( impl == null )
   	{
           return Response.status( Response.Status.UNAUTHORIZED ).build();     
   	}
   	
   	String scope[] = { DataRESTAPI.SCOPE_VIEWABLE_READ };
   	ResultAuthentication result = impl.authenticate( scope );
   	
   	if( result.isError() )
   	{
       	return formatReturn( result );
   	}
   	
	URL url = new URL( impl.getThumbnailURL( urn ) );
	HttpURLConnection connection = (HttpURLConnection)url.openConnection();

	connection.setRequestMethod( "GET" );
	result.setAuthHeader( connection );
	
       int httpStatus = connection.getResponseCode();
       if( httpStatus > 299 )
       {
        return Response.status( httpStatus )
                .header("Pragma", "no-cache")
                .header("Cache-Control", "no-cache")                
                .entity( connection.getErrorStream() )
                .build();     
       }

       // Copy Autodesk headers describing thumbnail
       Map<String, List<String>> headers = connection.getHeaderFields();
       Iterator<String> itr = headers.keySet().iterator();
       Response.ResponseBuilder builder = Response.status( httpStatus );
       while( itr.hasNext() )
       {
       	String key = itr.next();
       	if( key == null ) continue;
       	if( !key.startsWith( "x-ads" )) continue;
       	String value = connection.getHeaderField( key );
       	builder.header( key, value );                
       }
       
       return builder.entity( connection.getInputStream() )
               .header("content-encoding", connection.getContentEncoding() )      
               .header("content-type", connection.getContentType() )      
               .build();     
   }
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
public HttpResponse(HttpURLConnection urlConnection, byte[] body) {
    try {
        this.status = urlConnection.getResponseCode();
        this.url = urlConnection.getURL().toString();
    } catch (IOException e) {
        e.printStackTrace();
    }
    this.headers = urlConnection.getHeaderFields();
    this.body = body;
}
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
private boolean isResponseCookiePresent(HttpURLConnection proxyConn, 
    String expectedName, String expectedValue) {
  Map<String, List<String>> headerFields = proxyConn.getHeaderFields();
  List<String> cookiesHeader = headerFields.get("Set-Cookie");
  if (cookiesHeader != null) {
    for (String cookie : cookiesHeader) {
      HttpCookie c = HttpCookie.parse(cookie).get(0);
      if (c.getName().equals(expectedName) 
          && c.getValue().equals(expectedValue)) {
        return true;
      }
    }
  }
  return false;
}
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
/**
 * Helper method that extracts an authentication token received from a connection.
 * <p>
 * This method is used by {@link Authenticator} implementations.
 *
 * @param conn connection to extract the authentication token from.
 * @param token the authentication token.
 *
 * @throws IOException if an IO error occurred.
 * @throws AuthenticationException if an authentication exception occurred.
 */
public static void extractToken(HttpURLConnection conn, Token token) throws IOException, AuthenticationException {
  int respCode = conn.getResponseCode();
  if (respCode == HttpURLConnection.HTTP_OK
      || respCode == HttpURLConnection.HTTP_CREATED
      || respCode == HttpURLConnection.HTTP_ACCEPTED) {
    Map<String, List<String>> headers = conn.getHeaderFields();
    List<String> cookies = headers.get("Set-Cookie");
    if (cookies != null) {
      for (String cookie : cookies) {
        if (cookie.startsWith(AUTH_COOKIE_EQ)) {
          String value = cookie.substring(AUTH_COOKIE_EQ.length());
          int separator = value.indexOf(";");
          if (separator > -1) {
            value = value.substring(0, separator);
          }
          if (value.length() > 0) {
            token.set(value);
          }
        }
      }
    }
  } else {
    token.set(null);
    throw new AuthenticationException("Authentication failed, status: " + conn.getResponseCode() +
                                      ", message: " + conn.getResponseMessage());
  }
}
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
/**
 * Extracts OkHttp headers from the supplied {@link java.net.HttpURLConnection}. Only real headers
 * are extracted. See {@link #extractStatusLine(java.net.HttpURLConnection)}.
 */
private static Headers extractOkResponseHeaders(
    HttpURLConnection httpUrlConnection, Response.Builder okResponseBuilder) {
  Map<String, List<String>> javaResponseHeaders = httpUrlConnection.getHeaderFields();
  return extractOkHeaders(javaResponseHeaders, okResponseBuilder);
}