1 files changed, 74 insertions, 0 deletions
diff --git a/src/com/android/browser/DataUri.java b/src/com/android/browser/DataUri.java
new file mode 100644
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+++ b/src/com/android/browser/DataUri.java
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+/*
+ * Copyright (C) 2010 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 com.android.browser;
+
+import java.net.MalformedURLException;
+
+import libcore.io.Base64;
+
+/**
+ * Class extracts the mime type and data from a data uri.
+ * A data URI is of the form:
+ * <pre>
+ * data:[&lt;MIME-type&gt;][;charset=&lt;encoding&gt;][;base64],&lt;data&gt;
+ * </pre>
+ */
+public class DataUri {
+    private static final String DATA_URI_PREFIX = "data:";
+    private static final String BASE_64_ENCODING = ";base64";
+
+    private String mMimeType;
+    private byte[] mData;
+
+    public DataUri(String uri) throws MalformedURLException {
+        if (!isDataUri(uri)) {
+            throw new MalformedURLException("Not a data URI");
+        }
+
+        int commaIndex = uri.indexOf(',', DATA_URI_PREFIX.length());
+        if (commaIndex < 0) {
+            throw new MalformedURLException("Comma expected in data URI");
+        }
+        String contentType = uri.substring(DATA_URI_PREFIX.length(),
+                commaIndex);
+        mData = uri.substring(commaIndex + 1).getBytes();
+        if (contentType.contains(BASE_64_ENCODING)) {
+            mData = Base64.decode(mData);
+        }
+        int semiIndex = contentType.indexOf(';');
+        if (semiIndex > 0) {
+            mMimeType = contentType.substring(0, semiIndex);
+        } else {
+            mMimeType = contentType;
+        }
+    }
+
+    /**
+     * Returns true if the text passed in appears to be a data URI.
+     */
+    public static boolean isDataUri(String text)
+    {
+        return text.startsWith(DATA_URI_PREFIX);
+    }
+
+    public String getMimeType() {
+        return mMimeType;
+    }
+
+    public byte[] getData() {
+        return mData;
+    }
+}