/**
* Sets the value of the {@code "Connection"} header depending on the protocol version of the
* specified message. This method sets or removes the {@code "Connection"} header depending on
* what the default keep alive mode of the message's protocol version is, as specified by {@link
* HttpVersion#isKeepAliveDefault()}.
*
* <ul>
* <li>If the connection is kept alive by default:
* <ul>
* <li>set to {@code "close"} if {@code keepAlive} is {@code false}.
* <li>remove otherwise.
* </ul>
* <li>If the connection is closed by default:
* <ul>
* <li>set to {@code "keep-alive"} if {@code keepAlive} is {@code true}.
* <li>remove otherwise.
* </ul>
* </ul>
*/
public static void setKeepAlive(HttpHeader message, boolean keepAlive) {
if (message.getProtocolVersion().isKeepAliveDefault()) {
if (keepAlive) {
message.removeHeader(Names.CONNECTION);
} else {
message.setHeader(Names.CONNECTION, Values.CLOSE);
}
} else {
if (keepAlive) {
message.setHeader(Names.CONNECTION, Values.KEEP_ALIVE);
} else {
message.removeHeader(Names.CONNECTION);
}
}
}
/**
* Sets or removes the {@code "Expect: 100-continue"} header to / from the specified message. If
* the specified {@code value} is {@code true}, the {@code "Expect: 100-continue"} header is set
* and all other previous {@code "Expect"} headers are removed. Otherwise, all {@code "Expect"}
* headers are removed completely.
*/
public static void set100ContinueExpected(HttpHeader message, boolean set) {
if (set) {
message.setHeader(Names.EXPECT, Values.CONTINUE);
} else {
message.removeHeader(Names.EXPECT);
}
}
public static void removeTransferEncodingChunked(HttpHeader m) {
List<String> values = m.getHeaders(Names.TRANSFER_ENCODING);
values.remove(Values.CHUNKED);
if (values.isEmpty()) {
m.removeHeader(Names.TRANSFER_ENCODING);
} else {
m.setHeader(Names.TRANSFER_ENCODING, values);
}
}
/** Removes the header with the specified name. */
public static void removeHeader(HttpHeader message, String name) {
message.removeHeader(name);
}