Java tutorial
package org.apache.http.protocol; import java.nio.charset.Charset; import org.apache.http.Consts; public final class HTTP { @Deprecated public static final String ASCII = "ASCII"; @Deprecated public static final String CHARSET_PARAM = "; charset="; public static final String CHUNK_CODING = "chunked"; public static final String CONN_CLOSE = "Close"; public static final String CONN_DIRECTIVE = "Connection"; public static final String CONN_KEEP_ALIVE = "Keep-Alive"; public static final String CONTENT_ENCODING = "Content-Encoding"; public static final String CONTENT_LEN = "Content-Length"; public static final String CONTENT_TYPE = "Content-Type"; public static final int CR = 13; public static final String DATE_HEADER = "Date"; @Deprecated public static final String DEFAULT_CONTENT_CHARSET = "ISO-8859-1"; @Deprecated public static final String DEFAULT_CONTENT_TYPE = "application/octet-stream"; @Deprecated public static final String DEFAULT_PROTOCOL_CHARSET = "US-ASCII"; public static final Charset DEF_CONTENT_CHARSET; public static final Charset DEF_PROTOCOL_CHARSET; public static final String EXPECT_CONTINUE = "100-continue"; public static final String EXPECT_DIRECTIVE = "Expect"; public static final int HT = 9; public static final String IDENTITY_CODING = "identity"; @Deprecated public static final String ISO_8859_1 = "ISO-8859-1"; public static final int LF = 10; @Deprecated public static final String OCTET_STREAM_TYPE = "application/octet-stream"; @Deprecated public static final String PLAIN_TEXT_TYPE = "text/plain"; public static final String SERVER_HEADER = "Server"; public static final int SP = 32; public static final String TARGET_HOST = "Host"; public static final String TRANSFER_ENCODING = "Transfer-Encoding"; public static final String USER_AGENT = "User-Agent"; @Deprecated public static final String US_ASCII = "US-ASCII"; @Deprecated public static final String UTF_16 = "UTF-16"; @Deprecated public static final String UTF_8 = "UTF-8"; static { DEF_CONTENT_CHARSET = Consts.ISO_8859_1; DEF_PROTOCOL_CHARSET = Consts.ASCII; } public static boolean isWhitespace(char c) { return c == ' ' || c == '\t' || c == '\r' || c == '\n'; } private HTTP() { } }