/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.net.http;
import android.util.Config;
import android.util.Log;
import java.util.ArrayList;
import org.apache.http.HeaderElement;
import org.apache.http.entity.ContentLengthStrategy;
import org.apache.http.message.BasicHeaderValueParser;
import org.apache.http.message.ParserCursor;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.CharArrayBuffer;
/**
* Manages received headers
*
* {@hide}
*/
public final class Headers {
private static final String LOGTAG = "Http";
// header parsing constant
/**
* indicate HTTP 1.0 connection close after the response
*/
public final static int CONN_CLOSE = 1;
/**
* indicate HTTP 1.1 connection keep alive
*/
public final static int CONN_KEEP_ALIVE = 2;
// initial values.
public final static int NO_CONN_TYPE = 0;
public final static long NO_TRANSFER_ENCODING = 0;
public final static long NO_CONTENT_LENGTH = -1;
// header strings
public final static String TRANSFER_ENCODING = "transfer-encoding";
public final static String CONTENT_LEN = "content-length";
public final static String CONTENT_TYPE = "content-type";
public final static String CONTENT_ENCODING = "content-encoding";
public final static String CONN_DIRECTIVE = "connection";
public final static String LOCATION = "location";
public final static String PROXY_CONNECTION = "proxy-connection";
public final static String WWW_AUTHENTICATE = "www-authenticate";
public final static String PROXY_AUTHENTICATE = "proxy-authenticate";
public final static String CONTENT_DISPOSITION = "content-disposition";
public final static String ACCEPT_RANGES = "accept-ranges";
public final static String EXPIRES = "expires";
public final static String CACHE_CONTROL = "cache-control";
public final static String LAST_MODIFIED = "last-modified";
public final static String ETAG = "etag";
public final static String SET_COOKIE = "set-cookie";
public final static String PRAGMA = "pragma";
public final static String REFRESH = "refresh";
// following hash are generated by String.hashCode()
private final static int HASH_TRANSFER_ENCODING = 1274458357;
private final static int HASH_CONTENT_LEN = -1132779846;
private final static int HASH_CONTENT_TYPE = 785670158;
private final static int HASH_CONTENT_ENCODING = 2095084583;
private final static int HASH_CONN_DIRECTIVE = -775651618;
private final static int HASH_LOCATION = 1901043637;
private final static int HASH_PROXY_CONNECTION = 285929373;
private final static int HASH_WWW_AUTHENTICATE = -243037365;
private final static int HASH_PROXY_AUTHENTICATE = -301767724;
private final static int HASH_CONTENT_DISPOSITION = -1267267485;
private final static int HASH_ACCEPT_RANGES = 1397189435;
private final static int HASH_EXPIRES = -1309235404;
private final static int HASH_CACHE_CONTROL = -208775662;
private final static int HASH_LAST_MODIFIED = 150043680;
private final static int HASH_ETAG = 3123477;
private final static int HASH_SET_COOKIE = 1237214767;
private final static int HASH_PRAGMA = -980228804;
private final static int HASH_REFRESH = 1085444827;
// keep any headers that require direct access in a presized
// string array
private final static int IDX_TRANSFER_ENCODING = 0;
private final static int IDX_CONTENT_LEN = 1;
private final static int IDX_CONTENT_TYPE = 2;
private final static int IDX_CONTENT_ENCODING = 3;
private final static int IDX_CONN_DIRECTIVE = 4;
private final static int IDX_LOCATION = 5;
private final static int IDX_PROXY_CONNECTION = 6;
private final static int IDX_WWW_AUTHENTICATE = 7;
private final static int IDX_PROXY_AUTHENTICATE = 8;
private final static int IDX_CONTENT_DISPOSITION = 9;
private final static int IDX_ACCEPT_RANGES = 10;
private final static int IDX_EXPIRES = 11;
private final static int IDX_CACHE_CONTROL = 12;
private final static int IDX_LAST_MODIFIED = 13;
private final static int IDX_ETAG = 14;
private final static int IDX_SET_COOKIE = 15;
private final static int IDX_PRAGMA = 16;
private final static int IDX_REFRESH = 17;
private final static int HEADER_COUNT = 18;
/* parsed values */
private long transferEncoding;
private long contentLength; // Content length of the incoming data
private int connectionType;
private ArrayList<String> cookies = new ArrayList<String>(2);
private String[] mHeaders = new String[HEADER_COUNT];
private final static String[] sHeaderNames = {
TRANSFER_ENCODING,
CONTENT_LEN,
CONTENT_TYPE,
CONTENT_ENCODING,
CONN_DIRECTIVE,
LOCATION,
PROXY_CONNECTION,
WWW_AUTHENTICATE,
PROXY_AUTHENTICATE,
CONTENT_DISPOSITION,
ACCEPT_RANGES,
EXPIRES,
CACHE_CONTROL,
LAST_MODIFIED,
ETAG,
SET_COOKIE,
PRAGMA,
REFRESH
};
// Catch-all for headers not explicitly handled
private ArrayList<String> mExtraHeaderNames = new ArrayList<String>(4);
private ArrayList<String> mExtraHeaderValues = new ArrayList<String>(4);
public Headers() {
transferEncoding = NO_TRANSFER_ENCODING;
contentLength = NO_CONTENT_LENGTH;
connectionType = NO_CONN_TYPE;
}
public void parseHeader(CharArrayBuffer buffer) {
int pos = CharArrayBuffers.setLowercaseIndexOf(buffer, ':');
if (pos == -1) {
return;
}
String name = buffer.substringTrimmed(0, pos);
if (name.length() == 0) {
return;
}
pos++;
String val = buffer.substringTrimmed(pos, buffer.length());
if (HttpLog.LOGV) {
HttpLog.v("hdr " + buffer.length() + " " + buffer);
}
switch (name.hashCode()) {
case HASH_TRANSFER_ENCODING:
if (name.equals(TRANSFER_ENCODING)) {
mHeaders[IDX_TRANSFER_ENCODING] = val;
HeaderElement[] encodings = BasicHeaderValueParser.DEFAULT
.parseElements(buffer, new ParserCursor(pos,
buffer.length()));
// The chunked encoding must be the last one applied RFC2616,
// 14.41
int len = encodings.length;
if (HTTP.IDENTITY_CODING.equalsIgnoreCase(val)) {
transferEncoding = ContentLengthStrategy.IDENTITY;
} else if ((len > 0)
&& (HTTP.CHUNK_CODING
.equalsIgnoreCase(encodings[len - 1].getName()))) {
transferEncoding = ContentLengthStrategy.CHUNKED;
} else {
transferEncoding = ContentLengthStrategy.IDENTITY;
}
}
break;
case HASH_CONTENT_LEN:
if (name.equals(CONTENT_LEN)) {
mHeaders[IDX_CONTENT_LEN] = val;
try {
contentLength = Long.parseLong(val);
} catch (NumberFormatException e) {
if (Config.LOGV) {
Log.v(LOGTAG, "Headers.headers(): error parsing"
+ " content length: " + buffer.toString());
}
}
}
break;
case HASH_CONTENT_TYPE:
if (name.equals(CONTENT_TYPE)) {
mHeaders[IDX_CONTENT_TYPE] = val;
}
break;
case HASH_CONTENT_ENCODING:
if (name.equals(CONTENT_ENCODING)) {
mHeaders[IDX_CONTENT_ENCODING] = val;
}
break;
case HASH_CONN_DIRECTIVE:
if (name.equals(CONN_DIRECTIVE)) {
mHeaders[IDX_CONN_DIRECTIVE] = val;
setConnectionType(buffer, pos);
}
break;
case HASH_LOCATION:
if (name.equals(LOCATION)) {
mHeaders[IDX_LOCATION] = val;
}
break;
case HASH_PROXY_CONNECTION:
if (name.equals(PROXY_CONNECTION)) {
mHeaders[IDX_PROXY_CONNECTION] = val;
setConnectionType(buffer, pos);
}
break;
case HASH_WWW_AUTHENTICATE:
if (name.equals(WWW_AUTHENTICATE)) {
mHeaders[IDX_WWW_AUTHENTICATE] = val;
}
break;
case HASH_PROXY_AUTHENTICATE:
if (name.equals(PROXY_AUTHENTICATE)) {
mHeaders[IDX_PROXY_AUTHENTICATE] = val;
}
break;
case HASH_CONTENT_DISPOSITION:
if (name.equals(CONTENT_DISPOSITION)) {
mHeaders[IDX_CONTENT_DISPOSITION] = val;
}
break;
case HASH_ACCEPT_RANGES:
if (name.equals(ACCEPT_RANGES)) {
mHeaders[IDX_ACCEPT_RANGES] = val;
}
break;
case HASH_EXPIRES:
if (name.equals(EXPIRES)) {
mHeaders[IDX_EXPIRES] = val;
}
break;
case HASH_CACHE_CONTROL:
if (name.equals(CACHE_CONTROL)) {
mHeaders[IDX_CACHE_CONTROL] = val;
}
break;
case HASH_LAST_MODIFIED:
if (name.equals(LAST_MODIFIED)) {
mHeaders[IDX_LAST_MODIFIED] = val;
}
break;
case HASH_ETAG:
if (name.equals(ETAG)) {
mHeaders[IDX_ETAG] = val;
}
break;
case HASH_SET_COOKIE:
if (name.equals(SET_COOKIE)) {
mHeaders[IDX_SET_COOKIE] = val;
cookies.add(val);
}
break;
case HASH_PRAGMA:
if (name.equals(PRAGMA)) {
mHeaders[IDX_PRAGMA] = val;
}
break;
case HASH_REFRESH:
if (name.equals(REFRESH)) {
mHeaders[IDX_REFRESH] = val;
}
break;
default:
mExtraHeaderNames.add(name);
mExtraHeaderValues.add(val);
}
}
public long getTransferEncoding() {
return transferEncoding;
}
public long getContentLength() {
return contentLength;
}
public int getConnectionType() {
return connectionType;
}
public String getContentType() {
return mHeaders[IDX_CONTENT_TYPE];
}
public String getContentEncoding() {
return mHeaders[IDX_CONTENT_ENCODING];
}
public String getLocation() {
return mHeaders[IDX_LOCATION];
}
public String getWwwAuthenticate() {
return mHeaders[IDX_WWW_AUTHENTICATE];
}
public String getProxyAuthenticate() {
return mHeaders[IDX_PROXY_AUTHENTICATE];
}
public String getContentDisposition() {
return mHeaders[IDX_CONTENT_DISPOSITION];
}
public String getAcceptRanges() {
return mHeaders[IDX_ACCEPT_RANGES];
}
public String getExpires() {
return mHeaders[IDX_EXPIRES];
}
public String getCacheControl() {
return mHeaders[IDX_CACHE_CONTROL];
}
public String getLastModified() {
return mHeaders[IDX_LAST_MODIFIED];
}
public String getEtag() {
return mHeaders[IDX_ETAG];
}
public ArrayList<String> getSetCookie() {
return this.cookies;
}
public String getPragma() {
return mHeaders[IDX_PRAGMA];
}
public String getRefresh() {
return mHeaders[IDX_REFRESH];
}
public void setContentLength(long value) {
this.contentLength = value;
}
public void setContentType(String value) {
mHeaders[IDX_CONTENT_TYPE] = value;
}
public void setContentEncoding(String value) {
mHeaders[IDX_CONTENT_ENCODING] = value;
}
public void setLocation(String value) {
mHeaders[IDX_LOCATION] = value;
}
public void setWwwAuthenticate(String value) {
mHeaders[IDX_WWW_AUTHENTICATE] = value;
}
public void setProxyAuthenticate(String value) {
mHeaders[IDX_PROXY_AUTHENTICATE] = value;
}
public void setContentDisposition(String value) {
mHeaders[IDX_CONTENT_DISPOSITION] = value;
}
public void setAcceptRanges(String value) {
mHeaders[IDX_ACCEPT_RANGES] = value;
}
public void setExpires(String value) {
mHeaders[IDX_EXPIRES] = value;
}
public void setCacheControl(String value) {
mHeaders[IDX_CACHE_CONTROL] = value;
}
public void setLastModified(String value) {
mHeaders[IDX_LAST_MODIFIED] = value;
}
public void setEtag(String value) {
mHeaders[IDX_ETAG] = value;
}
public interface HeaderCallback {
public void header(String name, String value);
}
/**
* Reports all non-null headers to the callback
*/
public void getHeaders(HeaderCallback hcb) {
for (int i = 0; i < HEADER_COUNT; i++) {
String h = mHeaders[i];
if (h != null) {
hcb.header(sHeaderNames[i], h);
}
}
int extraLen = mExtraHeaderNames.size();
for (int i = 0; i < extraLen; i++) {
if (Config.LOGV) {
HttpLog.v("Headers.getHeaders() extra: " + i + " " +
mExtraHeaderNames.get(i) + " " + mExtraHeaderValues.get(i));
}
hcb.header(mExtraHeaderNames.get(i),
mExtraHeaderValues.get(i));
}
}
private void setConnectionType(CharArrayBuffer buffer, int pos) {
if (CharArrayBuffers.containsIgnoreCaseTrimmed(
buffer, pos, HTTP.CONN_CLOSE)) {
connectionType = CONN_CLOSE;
} else if (CharArrayBuffers.containsIgnoreCaseTrimmed(
buffer, pos, HTTP.CONN_KEEP_ALIVE)) {
connectionType = CONN_KEEP_ALIVE;
}
}
}
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