本文整理汇总了Java中java.net.URLConnection.getHeaderFieldDate方法的典型用法代码示例。如果您正苦于以下问题：Java URLConnection.getHeaderFieldDate方法的具体用法？Java URLConnection.getHeaderFieldDate怎么用？Java URLConnection.getHeaderFieldDate使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类java.net.URLConnection的用法示例。
在下文中一共展示了URLConnection.getHeaderFieldDate方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: calculateExpiry
import java.net.URLConnection; //导入方法依赖的package包/类
private long calculateExpiry(URLConnection urlConnection,
long request_time, UrlConnectionExpiryCalculator
urlConnectionExpiryCalculator)
{
if("no-cache".equals(urlConnection.getHeaderField("Pragma"))) {
return 0L;
}
final String cacheControl = urlConnection.getHeaderField(
"Cache-Control");
if(cacheControl != null ) {
if(cacheControl.indexOf("no-cache") != -1) {
return 0L;
}
final int max_age = getMaxAge(cacheControl);
if(-1 != max_age) {
final long response_time = System.currentTimeMillis();
final long apparent_age = Math.max(0, response_time -
urlConnection.getDate());
final long corrected_received_age = Math.max(apparent_age,
urlConnection.getHeaderFieldInt("Age", 0) * 1000L);
final long response_delay = response_time - request_time;
final long corrected_initial_age = corrected_received_age +
response_delay;
final long creation_time = response_time -
corrected_initial_age;
return max_age * 1000L + creation_time;
}
}
final long explicitExpiry = urlConnection.getHeaderFieldDate(
"Expires", -1L);
if(explicitExpiry != -1L) {
return explicitExpiry;
}
return urlConnectionExpiryCalculator == null ? 0L :
urlConnectionExpiryCalculator.calculateExpiry(urlConnection);
}
示例2: calculateExpiry
import java.net.URLConnection; //导入方法依赖的package包/类
private long calculateExpiry(URLConnection urlConnection,
long request_time, UrlConnectionExpiryCalculator
urlConnectionExpiryCalculator)
{
if("no-cache".equals(urlConnection.getHeaderField("Pragma"))) {
return 0L;
}
final String cacheControl = urlConnection.getHeaderField(
"Cache-Control");
if(cacheControl != null ) {
if(cacheControl.indexOf("no-cache") != -1) {
return 0L;
}
final int max_age = getMaxAge(cacheControl);
if(-1 != max_age) {
final long response_time = System.currentTimeMillis();
final long apparent_age = Math.max(0, response_time -
urlConnection.getDate());
final long corrected_received_age = Math.max(apparent_age,
urlConnection.getHeaderFieldInt("Age", 0) * 1000L);
final long response_delay = response_time - request_time;
final long corrected_initial_age = corrected_received_age +
response_delay;
final long creation_time = response_time -
corrected_initial_age;
return max_age * 1000L + creation_time;
}
}
final long explicitExpiry = urlConnection.getHeaderFieldDate(
"Expires", -1L);
if(explicitExpiry != -1L) {
return explicitExpiry;
}
return urlConnectionExpiryCalculator == null ? 0L :
urlConnectionExpiryCalculator.calculateExpiry(urlConnection);
}