auto import from //depot/cupcake/@135843

1 files changed, 0 insertions, 703 deletions

diff --git a/core/java/android/webkit/CacheManager.java b/core/java/android/webkit/CacheManager.java
deleted file mode 100644
index d12940d04f41..000000000000
--- a/core/java/android/webkit/CacheManager.java
+++ /dev/null
@@ -1,703 +0,0 @@
-/*
- * 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.webkit;
-
-import android.content.Context;
-import android.net.http.Headers;
-import android.os.FileUtils;
-import android.util.Config;
-import android.util.Log;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.util.ArrayList;
-import java.util.Map;
-
-import org.bouncycastle.crypto.Digest;
-import org.bouncycastle.crypto.digests.SHA1Digest;
-
-/**
- * The class CacheManager provides the persistent cache of content that is
- * received over the network. The component handles parsing of HTTP headers and
- * utilizes the relevant cache headers to determine if the content should be
- * stored and if so, how long it is valid for. Network requests are provided to
- * this component and if they can not be resolved by the cache, the HTTP headers
- * are attached, as appropriate, to the request for revalidation of content. The
- * class also manages the cache size.
- */
-public final class CacheManager {
-
-    private static final String LOGTAG = "cache";
-
-    static final String HEADER_KEY_IFMODIFIEDSINCE = "if-modified-since";
-    static final String HEADER_KEY_IFNONEMATCH = "if-none-match";
-
-    private static final String NO_STORE = "no-store";
-    private static final String NO_CACHE = "no-cache";
-    private static final String MAX_AGE = "max-age";
-
-    private static long CACHE_THRESHOLD = 6 * 1024 * 1024;
-    private static long CACHE_TRIM_AMOUNT = 2 * 1024 * 1024;
-
-    private static boolean mDisabled;
-
-    // Reference count the enable/disable transaction
-    private static int mRefCount;
-
-    // trimCacheIfNeeded() is called when a page is fully loaded. But JavaScript
-    // can load the content, e.g. in a slideshow, continuously, so we need to
-    // trim the cache on a timer base too. endCacheTransaction() is called on a 
-    // timer base. We share the same timer with less frequent update.
-    private static int mTrimCacheCount = 0;
-    private static final int TRIM_CACHE_INTERVAL = 5;
-
-    private static WebViewDatabase mDataBase;
-    private static File mBaseDir;
-    
-    // Flag to clear the cache when the CacheManager is initialized
-    private static boolean mClearCacheOnInit = false;
-
-    public static class CacheResult {
-        // these fields are saved to the database
-        int httpStatusCode;
-        long contentLength;
-        long expires;
-        String localPath;
-        String lastModified;
-        String etag;
-        String mimeType;
-        String location;
-        String encoding;
-
-        // these fields are NOT saved to the database
-        InputStream inStream;
-        OutputStream outStream;
-        File outFile;
-
-        public int getHttpStatusCode() {
-            return httpStatusCode;
-        }
-
-        public long getContentLength() {
-            return contentLength;
-        }
-
-        public String getLocalPath() {
-            return localPath;
-        }
-
-        public long getExpires() {
-            return expires;
-        }
-
-        public String getLastModified() {
-            return lastModified;
-        }
-
-        public String getETag() {
-            return etag;
-        }
-
-        public String getMimeType() {
-            return mimeType;
-        }
-
-        public String getLocation() {
-            return location;
-        }
-
-        public String getEncoding() {
-            return encoding;
-        }
-
-        // For out-of-package access to the underlying streams.
-        public InputStream getInputStream() {
-            return inStream;
-        }
-
-        public OutputStream getOutputStream() {
-            return outStream;
-        }
-
-        // These fields can be set manually.
-        public void setInputStream(InputStream stream) {
-            this.inStream = stream;
-        }
-
-        public void setEncoding(String encoding) {
-            this.encoding = encoding;
-        }
-    }
-
-    /**
-     * initialize the CacheManager. WebView should handle this for each process.
-     * 
-     * @param context The application context.
-     */
-    static void init(Context context) {
-        mDataBase = WebViewDatabase.getInstance(context);
-        mBaseDir = new File(context.getCacheDir(), "webviewCache");
-        if (createCacheDirectory() && mClearCacheOnInit) {
-            removeAllCacheFiles();
-            mClearCacheOnInit = false;
-        }
-    }
-    
-    /**
-     * Create the cache directory if it does not already exist.
-     * 
-     * @return true if the cache directory didn't exist and was created.
-     */
-    static private boolean createCacheDirectory() {
-        if (!mBaseDir.exists()) {
-            if(!mBaseDir.mkdirs()) {
-                Log.w(LOGTAG, "Unable to create webviewCache directory");
-                return false;
-            }
-            FileUtils.setPermissions(
-                    mBaseDir.toString(),
-                    FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH,
-                    -1, -1);
-            // If we did create the directory, we need to flush 
-            // the cache database. The directory could be recreated
-            // because the system flushed all the data/cache directories
-            // to free up disk space.
-            WebViewCore.endCacheTransaction();
-            mDataBase.clearCache();
-            WebViewCore.startCacheTransaction();
-            return true;
-        }
-        return false;
-    }
-
-    /**
-     * get the base directory of the cache. With localPath of the CacheResult,
-     * it identifies the cache file.
-     * 
-     * @return File The base directory of the cache.
-     */
-    public static File getCacheFileBaseDir() {
-        return mBaseDir;
-    }
-
-    /**
-     * set the flag to control whether cache is enabled or disabled
-     * 
-     * @param disabled true to disable the cache
-     */
-    // only called from WebCore thread
-    static void setCacheDisabled(boolean disabled) {
-        if (disabled == mDisabled) {
-            return;
-        }
-        mDisabled = disabled;
-        if (mDisabled) {
-            removeAllCacheFiles();
-        }
-    }
-
-    /**
-     * get the state of the current cache, enabled or disabled
-     * 
-     * @return return if it is disabled
-     */
-    public static boolean cacheDisabled() {
-        return mDisabled;
-    }
-
-    // only called from WebCore thread
-    // make sure to call enableTransaction/disableTransaction in pair
-    static boolean enableTransaction() {
-        if (++mRefCount == 1) {
-            mDataBase.startCacheTransaction();
-            return true;
-        }
-        return false;
-    }
-
-    // only called from WebCore thread
-    // make sure to call enableTransaction/disableTransaction in pair
-    static boolean disableTransaction() {
-        if (mRefCount == 0) {
-            Log.e(LOGTAG, "disableTransaction is out of sync");
-        }
-        if (--mRefCount == 0) {
-            mDataBase.endCacheTransaction();
-            return true;
-        }
-        return false;
-    }
-
-    // only called from WebCore thread
-    // make sure to call startCacheTransaction/endCacheTransaction in pair
-    public static boolean startCacheTransaction() {
-        return mDataBase.startCacheTransaction();
-    }
-
-    // only called from WebCore thread
-    // make sure to call startCacheTransaction/endCacheTransaction in pair
-    public static boolean endCacheTransaction() {
-        boolean ret = mDataBase.endCacheTransaction();
-        if (++mTrimCacheCount >= TRIM_CACHE_INTERVAL) {
-            mTrimCacheCount = 0;
-            trimCacheIfNeeded();
-        }
-        return ret;
-    }
-
-    /**
-     * Given a url, returns the CacheResult if exists. Otherwise returns null.
-     * If headers are provided and a cache needs validation,
-     * HEADER_KEY_IFNONEMATCH or HEADER_KEY_IFMODIFIEDSINCE will be set in the
-     * cached headers.
-     * 
-     * @return the CacheResult for a given url
-     */
-    // only called from WebCore thread
-    public static CacheResult getCacheFile(String url,
-            Map<String, String> headers) {
-        if (mDisabled) {
-            return null;
-        }
-
-        CacheResult result = mDataBase.getCache(url);
-        if (result != null) {
-            if (result.contentLength == 0) {
-                if (result.httpStatusCode != 301
-                        && result.httpStatusCode != 302
-                        && result.httpStatusCode != 307) {
-                    // this should not happen. If it does, remove it.
-                    mDataBase.removeCache(url);
-                    return null;
-                }
-            } else {
-                File src = new File(mBaseDir, result.localPath);
-                try {
-                    // open here so that even the file is deleted, the content
-                    // is still readable by the caller until close() is called
-                    result.inStream = new FileInputStream(src);
-                } catch (FileNotFoundException e) {
-                    // the files in the cache directory can be removed by the
-                    // system. If it is gone, clean up the database
-                    mDataBase.removeCache(url);
-                    return null;
-                }
-            }
-        } else {
-            return null;
-        }
-
-        // null headers request coming from CACHE_MODE_CACHE_ONLY
-        // which implies that it needs cache even it is expired.
-        // negative expires means time in the far future.
-        if (headers != null && result.expires >= 0
-                && result.expires <= System.currentTimeMillis()) {
-            if (result.lastModified == null && result.etag == null) {
-                return null;
-            }
-            // return HEADER_KEY_IFNONEMATCH or HEADER_KEY_IFMODIFIEDSINCE
-            // for requesting validation
-            if (result.etag != null) {
-                headers.put(HEADER_KEY_IFNONEMATCH, result.etag);
-            }
-            if (result.lastModified != null) {
-                headers.put(HEADER_KEY_IFMODIFIEDSINCE, result.lastModified);
-            }
-        }
-
-        if (Config.LOGV) {
-            Log.v(LOGTAG, "getCacheFile for url " + url);
-        }
-
-        return result;
-    }
-
-    /**
-     * Given a url and its full headers, returns CacheResult if a local cache
-     * can be stored. Otherwise returns null. The mimetype is passed in so that
-     * the function can use the mimetype that will be passed to WebCore which
-     * could be different from the mimetype defined in the headers.
-     * forceCache is for out-of-package callers to force creation of a
-     * CacheResult, and is used to supply surrogate responses for URL
-     * interception.
-     * @return CacheResult for a given url
-     * @hide - hide createCacheFile since it has a parameter of type headers, which is
-     * in a hidden package.
-     */
-    // can be called from any thread
-    public static CacheResult createCacheFile(String url, int statusCode,
-            Headers headers, String mimeType, boolean forceCache) {
-        if (!forceCache && mDisabled) {
-            return null;
-        }
-
-        CacheResult ret = parseHeaders(statusCode, headers, mimeType);
-        if (ret != null) {
-            setupFiles(url, ret);
-            try {
-                ret.outStream = new FileOutputStream(ret.outFile);
-            } catch (FileNotFoundException e) {
-                // This can happen with the system did a purge and our
-                // subdirectory has gone, so lets try to create it again
-                if (createCacheDirectory()) {
-                    try {
-                        ret.outStream = new FileOutputStream(ret.outFile);
-                    } catch  (FileNotFoundException e2) {
-                        // We failed to create the file again, so there
-                        // is something else wrong. Return null.
-                        return null;
-                    }
-                } else {
-                    // Failed to create cache directory
-                    return null;
-                }
-            }
-            ret.mimeType = mimeType;
-        }
-
-        return ret;
-    }
-
-    /**
-     * Save the info of a cache file for a given url to the CacheMap so that it
-     * can be reused later
-     */
-    // only called from WebCore thread
-    public static void saveCacheFile(String url, CacheResult cacheRet) {
-        try {
-            cacheRet.outStream.close();
-        } catch (IOException e) {
-            return;
-        }
-
-        if (!cacheRet.outFile.exists()) {
-            // the file in the cache directory can be removed by the system
-            return;
-        }
-
-        cacheRet.contentLength = cacheRet.outFile.length();
-        if (cacheRet.httpStatusCode == 301
-                || cacheRet.httpStatusCode == 302
-                || cacheRet.httpStatusCode == 307) {
-            // location is in database, no need to keep the file
-            cacheRet.contentLength = 0;
-            cacheRet.localPath = new String();
-            cacheRet.outFile.delete();
-        } else if (cacheRet.contentLength == 0) {
-            cacheRet.outFile.delete();
-            return;
-        }
-
-        mDataBase.addCache(url, cacheRet);
-
-        if (Config.LOGV) {
-            Log.v(LOGTAG, "saveCacheFile for url " + url);
-        }
-    }
-
-    /**
-     * remove all cache files
-     * 
-     * @return true if it succeeds
-     */
-    // only called from WebCore thread
-    static boolean removeAllCacheFiles() {
-        // Note, this is called before init() when the database is
-        // created or upgraded.
-        if (mBaseDir == null) {
-            // Init() has not been called yet, so just flag that
-            // we need to clear the cache when init() is called.
-            mClearCacheOnInit = true;
-            return true;
-        }
-        // delete cache in a separate thread to not block UI.
-        final Runnable clearCache = new Runnable() {
-            public void run() {
-                // delete all cache files
-                try {
-                    String[] files = mBaseDir.list();
-                    // if mBaseDir doesn't exist, files can be null.
-                    if (files != null) {
-                        for (int i = 0; i < files.length; i++) {
-                            new File(mBaseDir, files[i]).delete();
-                        }
-                    }
-                } catch (SecurityException e) {
-                    // Ignore SecurityExceptions.
-                }
-                // delete database
-                mDataBase.clearCache();
-            }
-        };
-        new Thread(clearCache).start();
-        return true;
-    }
-
-    /**
-     * Return true if the cache is empty.
-     */
-    // only called from WebCore thread
-    static boolean cacheEmpty() {
-        return mDataBase.hasCache();
-    }
-
-    // only called from WebCore thread
-    static void trimCacheIfNeeded() {
-        if (mDataBase.getCacheTotalSize() > CACHE_THRESHOLD) {
-            ArrayList<String> pathList = mDataBase.trimCache(CACHE_TRIM_AMOUNT);
-            int size = pathList.size();
-            for (int i = 0; i < size; i++) {
-                new File(mBaseDir, pathList.get(i)).delete();
-            }
-        }
-    }
-
-    @SuppressWarnings("deprecation")
-    private static void setupFiles(String url, CacheResult cacheRet) {
-        if (true) {
-            // Note: SHA1 is much stronger hash. But the cost of setupFiles() is
-            // 3.2% cpu time for a fresh load of nytimes.com. While a simple
-            // String.hashCode() is only 0.6%. If adding the collision resolving
-            // to String.hashCode(), it makes the cpu time to be 1.6% for a 
-            // fresh load, but 5.3% for the worst case where all the files 
-            // already exist in the file system, but database is gone. So it
-            // needs to resolve collision for every file at least once.
-            int hashCode = url.hashCode();
-            StringBuffer ret = new StringBuffer(8);
-            appendAsHex(hashCode, ret);
-            String path = ret.toString();
-            File file = new File(mBaseDir, path);
-            if (true) {
-                boolean checkOldPath = true;
-                // Check hash collision. If the hash file doesn't exist, just
-                // continue. There is a chance that the old cache file is not
-                // same as the hash file. As mDataBase.getCache() is more 
-                // expansive than "leak" a file until clear cache, don't bother.
-                // If the hash file exists, make sure that it is same as the 
-                // cache file. If it is not, resolve the collision.
-                while (file.exists()) {
-                    if (checkOldPath) {
-                        // as this is called from http thread through 
-                        // createCacheFile, we need endCacheTransaction before 
-                        // database access.
-                        WebViewCore.endCacheTransaction();
-                        CacheResult oldResult = mDataBase.getCache(url);
-                        WebViewCore.startCacheTransaction();
-                        if (oldResult != null && oldResult.contentLength > 0) {
-                            if (path.equals(oldResult.localPath)) {
-                                path = oldResult.localPath;
-                            } else {
-                                path = oldResult.localPath;
-                                file = new File(mBaseDir, path);
-                            }
-                            break;
-                        }
-                        checkOldPath = false;
-                    }
-                    ret = new StringBuffer(8);
-                    appendAsHex(++hashCode, ret);
-                    path = ret.toString();
-                    file = new File(mBaseDir, path);
-                }
-            }
-            cacheRet.localPath = path;
-            cacheRet.outFile = file;
-        } else {
-            // get hash in byte[]
-            Digest digest = new SHA1Digest();
-            int digestLen = digest.getDigestSize();
-            byte[] hash = new byte[digestLen];
-            int urlLen = url.length();
-            byte[] data = new byte[urlLen];
-            url.getBytes(0, urlLen, data, 0);
-            digest.update(data, 0, urlLen);
-            digest.doFinal(hash, 0);
-            // convert byte[] to hex String
-            StringBuffer result = new StringBuffer(2 * digestLen);
-            for (int i = 0; i < digestLen; i = i + 4) {
-                int h = (0x00ff & hash[i]) << 24 | (0x00ff & hash[i + 1]) << 16
-                        | (0x00ff & hash[i + 2]) << 8 | (0x00ff & hash[i + 3]);
-                appendAsHex(h, result);
-            }
-            cacheRet.localPath = result.toString();
-            cacheRet.outFile = new File(mBaseDir, cacheRet.localPath);
-        }
-    }
-
-    private static void appendAsHex(int i, StringBuffer ret) {
-        String hex = Integer.toHexString(i);
-        switch (hex.length()) {
-            case 1:
-                ret.append("0000000");
-                break;
-            case 2:
-                ret.append("000000");
-                break;
-            case 3:
-                ret.append("00000");
-                break;
-            case 4:
-                ret.append("0000");
-                break;
-            case 5:
-                ret.append("000");
-                break;
-            case 6:
-                ret.append("00");
-                break;
-            case 7:
-                ret.append("0");
-                break;
-        }
-        ret.append(hex);
-    }
-
-    private static CacheResult parseHeaders(int statusCode, Headers headers,
-            String mimeType) {
-        // TODO: if authenticated or secure, return null
-        CacheResult ret = new CacheResult();
-        ret.httpStatusCode = statusCode;
-
-        String location = headers.getLocation();
-        if (location != null) ret.location = location;
-
-        ret.expires = -1;
-        String expires = headers.getExpires();
-        if (expires != null) {
-            try {
-                ret.expires = HttpDateTime.parse(expires);
-            } catch (IllegalArgumentException ex) {
-                // Take care of the special "-1" and "0" cases
-                if ("-1".equals(expires) || "0".equals(expires)) {
-                    // make it expired, but can be used for history navigation
-                    ret.expires = 0;
-                } else {
-                    Log.e(LOGTAG, "illegal expires: " + expires);
-                }
-            }
-        }
-
-        String lastModified = headers.getLastModified();
-        if (lastModified != null) ret.lastModified = lastModified;
-
-        String etag = headers.getEtag();
-        if (etag != null) ret.etag = etag;
-
-        String cacheControl = headers.getCacheControl();
-        if (cacheControl != null) {
-            String[] controls = cacheControl.toLowerCase().split("[ ,;]");
-            for (int i = 0; i < controls.length; i++) {
-                if (NO_STORE.equals(controls[i])) {
-                    return null;
-                }
-                // According to the spec, 'no-cache' means that the content
-                // must be re-validated on every load. It does not mean that
-                // the content can not be cached. set to expire 0 means it
-                // can only be used in CACHE_MODE_CACHE_ONLY case
-                if (NO_CACHE.equals(controls[i])) {
-                    ret.expires = 0;
-                } else if (controls[i].startsWith(MAX_AGE)) {
-                    int separator = controls[i].indexOf('=');
-                    if (separator < 0) {
-                        separator = controls[i].indexOf(':');
-                    }
-                    if (separator > 0) {
-                        String s = controls[i].substring(separator + 1);
-                        try {
-                            long sec = Long.parseLong(s);
-                            if (sec >= 0) {
-                                ret.expires = System.currentTimeMillis() + 1000
-                                        * sec;
-                            }
-                        } catch (NumberFormatException ex) {
-                            if ("1d".equals(s)) {
-                                // Take care of the special "1d" case
-                                ret.expires = System.currentTimeMillis() + 86400000; // 24*60*60*1000
-                            } else {
-                                Log.e(LOGTAG, "exception in parseHeaders for "
-                                        + "max-age:"
-                                        + controls[i].substring(separator + 1));
-                                ret.expires = 0;
-                            }
-                        }
-                    }
-                }
-            }
-        }
-
-        // According to RFC 2616 section 14.32:
-        // HTTP/1.1 caches SHOULD treat "Pragma: no-cache" as if the
-        // client had sent "Cache-Control: no-cache"
-        if (NO_CACHE.equals(headers.getPragma())) {
-            ret.expires = 0;
-        }
-
-        // According to RFC 2616 section 13.2.4, if an expiration has not been
-        // explicitly defined a heuristic to set an expiration may be used.
-        if (ret.expires == -1) {
-            if (ret.httpStatusCode == 301) {
-                // If it is a permanent redirect, and it did not have an
-                // explicit cache directive, then it never expires
-                ret.expires = Long.MAX_VALUE;
-            } else if (ret.httpStatusCode == 302 || ret.httpStatusCode == 307) {
-                // If it is temporary redirect, expires
-                ret.expires = 0;
-            } else if (ret.lastModified == null) {
-                // When we have no last-modified, then expire the content with
-                // in 24hrs as, according to the RFC, longer time requires a
-                // warning 113 to be added to the response.
-
-                // Only add the default expiration for non-html markup. Some
-                // sites like news.google.com have no cache directives.
-                if (!mimeType.startsWith("text/html")) {
-                    ret.expires = System.currentTimeMillis() + 86400000; // 24*60*60*1000
-                } else {
-                    // Setting a expires as zero will cache the result for
-                    // forward/back nav.
-                    ret.expires = 0;
-                }
-            } else {
-                // If we have a last-modified value, we could use it to set the
-                // expiration. Suggestion from RFC is 10% of time since
-                // last-modified. As we are on mobile, loads are expensive,
-                // increasing this to 20%.
-
-                // 24 * 60 * 60 * 1000
-                long lastmod = System.currentTimeMillis() + 86400000;
-                try {
-                    lastmod = HttpDateTime.parse(ret.lastModified);
-                } catch (IllegalArgumentException ex) {
-                    Log.e(LOGTAG, "illegal lastModified: " + ret.lastModified);
-                }
-                long difference = System.currentTimeMillis() - lastmod;
-                if (difference > 0) {
-                    ret.expires = System.currentTimeMillis() + difference / 5;
-                } else {
-                    // last modified is in the future, expire the content
-                    // on the last modified
-                    ret.expires = lastmod;
-                }
-            }
-        }
-
-        return ret;
-    }
-}