Java Code Examples for java.net.HttpURLConnection#getRequestProperty()

/**
 * 添加Post请求内容
 *
 * @param connection connection
 * @param params     params
 * @return 是否添加成功
 * @throws IOException IOException
 */
protected boolean addContentBody(HttpURLConnection connection, RequestParams params) throws IOException {
    if (params.getBody() == null) {
        return false;
    }
    connection.setFixedLengthStreamingMode(params.getBody().length);
    connection.setDoOutput(true);
    String requestProperty = connection.getRequestProperty(RequestParams.HEADER_CONTENT_TYPE);
    if (TextUtils.isEmpty(requestProperty)) {
        connection.addRequestProperty(RequestParams.HEADER_CONTENT_TYPE, params.getContentType());
    }
    DataOutputStream out = new DataOutputStream(connection.getOutputStream());
    out.write(params.getBody());
    out.close();

    return true;
}
 

/**
 * Add the appropriate Authorization header to the HttpURLConnection.
 *
 * @param connection The HttpURLConnection to which the header will be added.
 * @param method The HTTP method to use (GET, PUT, DELETE)
 * @param bucket the bucket name this request is for
 * @param key the key this request is for
 * @param pathArgs path arguments which are part of this request
 */
private void addAuthHeader(HttpURLConnection connection, String method, String bucket, String key, Map pathArgs) {
    if (connection.getRequestProperty("Date") == null) {
        connection.setRequestProperty("Date", httpDate());
    }
    if (connection.getRequestProperty("Content-Type") == null) {
        connection.setRequestProperty("Content-Type", "");
    }

    if (this.awsAccessKeyId != null && this.awsSecretAccessKey != null) {
        String canonicalString
                = Utils.makeCanonicalString(method, bucket, key, pathArgs, connection.getRequestProperties());
        String encodedCanonical = Utils.encode(this.awsSecretAccessKey, canonicalString, false);
        connection.setRequestProperty("Authorization",
                "AWS " + this.awsAccessKeyId + ":" + encodedCanonical);
    }
}
 

/**
 * Get the content length of the request in the given HTTP connection.
 * @param connection The connection.
 * @return The content length, or zero if not found.
 */
private long getRequestContentLength(HttpURLConnection connection) {
  String lengthString = connection.getRequestProperty(
      HeaderConstants.CONTENT_LENGTH);
  if (lengthString != null){
    return Long.parseLong(lengthString);
  }
  else{
    return 0;
  }
}
 

/**
 * Get the content length of the request in the given HTTP connection.
 * @param connection The connection.
 * @return The content length, or zero if not found.
 */
private long getRequestContentLength(HttpURLConnection connection) {
  String lengthString = connection.getRequestProperty(
      HeaderConstants.CONTENT_LENGTH);
  if (lengthString != null){
    return Long.parseLong(lengthString);
  }
  else{
    return 0;
  }
}
 

private static InputStream getInputStream(HttpURLConnection c) throws Exception
{
	//Object x = c.getContent();
	
	InputStream in = c.getInputStream();
	String s = c.getRequestProperty("Content-Encoding");
	if(s != null)
	{
		if(s.contains("zip"))
		{
			return new GZIPInputStream(in);
		}
	}
	return in;
}
 

@Nullable
@Override
public String getFirstHeader(String headerName, HttpURLConnection urlConnection) {
    return urlConnection.getRequestProperty(headerName);
}
 

/**
 * 设置头部参数
 *
 * @throws ProtocolException
 */
public static HttpURLConnection setConnectParam(HttpTaskOption delegate, HttpURLConnection conn) {
  if (delegate.getRequestEnum() == RequestEnum.POST) {
    conn.setDoInput(true);
    conn.setDoOutput(true);
    conn.setUseCaches(false);
  }
  Set<String> keys = null;
  if (delegate.getHeaders() != null && delegate.getHeaders().size() > 0) {
    keys = delegate.getHeaders().keySet();
    for (String key : keys) {
      conn.setRequestProperty(key, delegate.getHeaders().get(key));
    }
  }
  if (conn.getRequestProperty("Accept-Language") == null) {
    conn.setRequestProperty("Accept-Language", "zh-CN,zh;q=0.9,en;q=0.8,ja;q=0.7");
  }
  if (conn.getRequestProperty("Accept-Encoding") == null) {
    conn.setRequestProperty("Accept-Encoding", "identity");
  }
  if (conn.getRequestProperty("Accept-Charset") == null) {
    conn.setRequestProperty("Accept-Charset", "UTF-8");
  }
  if (conn.getRequestProperty("Connection") == null) {
    conn.setRequestProperty("Connection", "Keep-Alive");
  }
  if (conn.getRequestProperty("Charset") == null) {
    conn.setRequestProperty("Charset", "UTF-8");
  }
  if (conn.getRequestProperty("User-Agent") == null) {
    conn.setRequestProperty("User-Agent",
        "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36");
  }
  if (conn.getRequestProperty("Accept") == null) {
    StringBuilder accept = new StringBuilder();
    accept.append("image/gif, ")
        .append("image/jpeg, ")
        .append("image/pjpeg, ")
        .append("image/webp, ")
        .append("image/apng, ")
        .append("application/xml, ")
        .append("application/xaml+xml, ")
        .append("application/xhtml+xml, ")
        .append("application/x-shockwave-flash, ")
        .append("application/x-ms-xbap, ")
        .append("application/x-ms-application, ")
        .append("application/msword, ")
        .append("application/vnd.ms-excel, ")
        .append("application/vnd.ms-xpsdocument, ")
        .append("application/vnd.ms-powerpoint, ")
        .append("application/signed-exchange, ")
        .append("text/plain, ")
        .append("text/html, ")
        .append("*/*");
    conn.setRequestProperty("Accept", accept.toString());
  }
  //302获取重定向地址
  conn.setInstanceFollowRedirects(false);

  CookieManager manager = delegate.getCookieManager();
  if (manager != null) {
    CookieStore store = manager.getCookieStore();
    if (store != null && store.getCookies().size() > 0) {
      conn.setRequestProperty("Cookie",
          TextUtils.join(";", store.getCookies()));
    }
  }

  return conn;
}
 

private static String setAndReturnRequestHeaderValue(String value) throws Exception {
    URL url = new URL("http://www.google.com/");
    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
    urlConnection.addRequestProperty("key", value);
    return urlConnection.getRequestProperty("key");
}
 

/**
 * Returns the standard header value from the specified connection request, or an empty string if no header value
 * has been specified for the request.
 * 
 * @param conn
 *            An <code>HttpURLConnection</code> object that represents the request.
 * @param headerName
 *            A <code>String</code> that represents the name of the header being requested.
 * 
 * @return A <code>String</code> that represents the header value, or <code>null</code> if there is no corresponding
 *         header value for <code>headerName</code>.
 */
public static String getStandardHeaderValue(final HttpURLConnection conn, final String headerName) {
    final String headerValue = conn.getRequestProperty(headerName);

    // Coalesce null value
    return headerValue == null ? Constants.EMPTY_STRING : headerValue;
}