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package org.glassfish.grizzly.http;
import java.io.UnsupportedEncodingException;
import org.glassfish.grizzly.Buffer;
import org.glassfish.grizzly.http.util.BufferChunk;
import org.glassfish.grizzly.http.util.ByteChunk;
import org.glassfish.grizzly.http.util.DataChunk;
import org.glassfish.grizzly.utils.Charsets;
/**
* Predefined HTTP protocol versions
*
* @author Alexey Stashok
*/
public enum Protocol {
HTTP_0_9 (0, 9),
HTTP_1_0 (1, 0),
HTTP_1_1 (1, 1),
HTTP_2_0 (2, 0);
public static Protocol valueOf(final byte[] protocolBytes,
final int offset, final int len) {
if (len == 0) {
return Protocol.HTTP_0_9;
} else if (equals(HTTP_1_1, protocolBytes, offset, len)) {
return Protocol.HTTP_1_1;
} else if (equals(HTTP_1_0, protocolBytes, offset, len)) {
return Protocol.HTTP_1_0;
} else if (equals(HTTP_2_0, protocolBytes, offset, len)) {
return Protocol.HTTP_2_0;
} else if (equals(HTTP_0_9, protocolBytes, offset, len)) {
return Protocol.HTTP_0_9;
}
throw new IllegalStateException("Unknown protocol " +
new String(protocolBytes, offset, len, Charsets.ASCII_CHARSET));
}
public static Protocol valueOf(final Buffer protocolBuffer,
final int offset, final int len) {
if (len == 0) {
return Protocol.HTTP_0_9;
} else if (equals(HTTP_1_1, protocolBuffer, offset, len)) {
return Protocol.HTTP_1_1;
} else if (equals(HTTP_1_0, protocolBuffer, offset, len)) {
return Protocol.HTTP_1_0;
} else if (equals(HTTP_2_0, protocolBuffer, offset, len)) {
return Protocol.HTTP_2_0;
} else if (equals(HTTP_0_9, protocolBuffer, offset, len)) {
return Protocol.HTTP_0_9;
}
throw new IllegalStateException("Unknown protocol " +
protocolBuffer.toStringContent(Charsets.ASCII_CHARSET, offset, len));
}
public static Protocol valueOf(final DataChunk protocolC) {
if (protocolC.getLength() == 0) {
return Protocol.HTTP_0_9;
} else if (protocolC.equals(Protocol.HTTP_1_1.getProtocolBytes())) {
return Protocol.HTTP_1_1;
} else if (protocolC.equals(Protocol.HTTP_1_0.getProtocolBytes())) {
return Protocol.HTTP_1_0;
} else if (protocolC.equals(Protocol.HTTP_2_0.getProtocolBytes())) {
return Protocol.HTTP_2_0;
} else if (protocolC.equals(Protocol.HTTP_0_9.getProtocolBytes())) {
return Protocol.HTTP_0_9;
}
throw new IllegalStateException("Unknown protocol " + protocolC.toString());
}
private static boolean equals(final Protocol protocol,
final byte[] protocolBytes,
final int offset, final int len) {
final byte[] knownProtocolBytes = protocol.getProtocolBytes();
return ByteChunk.equals(knownProtocolBytes, 0, knownProtocolBytes.length,
protocolBytes, offset, len);
}
private static boolean equals(final Protocol protocol,
final Buffer protocolBuffer,
final int offset,
final int len) {
final byte[] knownProtocolBytes = protocol.getProtocolBytes();
return BufferChunk.equals(knownProtocolBytes, 0, knownProtocolBytes.length,
protocolBuffer, offset, len);
}
private final String protocolString;
private final int majorVersion;
private final int minorVersion;
private final byte[] protocolBytes;
Protocol(final int majorVersion, final int minorVersion) {
this.majorVersion = majorVersion;
this.minorVersion = minorVersion;
this.protocolString = "HTTP/" + majorVersion + '.' + minorVersion;
byte[] protocolBytes0;
try {
protocolBytes0 = protocolString.getBytes("US-ASCII");
} catch (UnsupportedEncodingException ignored) {
protocolBytes0 = protocolString.getBytes(Charsets.ASCII_CHARSET);
}
this.protocolBytes = protocolBytes0;
}
public int getMajorVersion() {
return majorVersion;
}
public int getMinorVersion() {
return minorVersion;
}
public String getProtocolString() {
return protocolString;
}
public byte[] getProtocolBytes() {
return protocolBytes;
}
public boolean equals(final String s) {
return s != null &&
ByteChunk.equals(protocolBytes, 0, protocolBytes.length, s);
}
public boolean equals(final DataChunk protocolC) {
return protocolC != null &&
!protocolC.isNull() &&
protocolC.equals(protocolBytes);
}
}
