1/*
2 * Copyright (C) 2007 Alp Toker <alp@atoker.com>
3 * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "config.h"
28#include "DataURL.h"
29
30#include "Base64.h"
31#include "HTTPParsers.h"
32#include "ResourceHandle.h"
33#include "ResourceHandleClient.h"
34#include "ResourceRequest.h"
35#include "ResourceResponse.h"
36#include "TextEncoding.h"
37#include <wtf/text/CString.h>
38
39namespace WebCore {
40
41void handleDataURL(ResourceHandle* handle)
42{
43    ASSERT(handle->firstRequest().url().protocolIs("data"));
44    String url = handle->firstRequest().url().string();
45
46    int index = url.find(',');
47    if (index == -1) {
48        handle->client()->cannotShowURL(handle);
49        return;
50    }
51
52    String mediaType = url.substring(5, index - 5);
53    String data = url.substring(index + 1);
54
55    bool base64 = mediaType.endsWith(";base64", false);
56    if (base64)
57        mediaType = mediaType.left(mediaType.length() - 7);
58
59    if (mediaType.isEmpty())
60        mediaType = "text/plain;charset=US-ASCII";
61
62    String mimeType = extractMIMETypeFromMediaType(mediaType);
63    String charset = extractCharsetFromMediaType(mediaType);
64
65    ResourceResponse response;
66    response.setMimeType(mimeType);
67    response.setTextEncodingName(charset);
68    response.setURL(handle->firstRequest().url());
69
70    if (base64) {
71        data = decodeURLEscapeSequences(data);
72        handle->client()->didReceiveResponse(handle, response);
73
74        Vector<char> out;
75        if (base64Decode(data, out, IgnoreWhitespace) && out.size() > 0) {
76            response.setExpectedContentLength(out.size());
77            handle->client()->didReceiveData(handle, out.data(), out.size(), 0);
78        }
79    } else {
80        data = decodeURLEscapeSequences(data, TextEncoding(charset));
81        handle->client()->didReceiveResponse(handle, response);
82
83        CString encodedData = TextEncoding().encode(data.characters(), data.length(), URLEncodedEntitiesForUnencodables);
84        response.setExpectedContentLength(encodedData.length());
85        if (encodedData.length())
86            handle->client()->didReceiveData(handle, encodedData.data(), encodedData.length(), 0);
87    }
88
89    handle->client()->didFinishLoading(handle, 0);
90}
91
92} // namespace WebCore
93