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 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 "HTTPParsers.h"
31#include "ResourceHandle.h"
32#include "ResourceHandleClient.h"
33#include "ResourceRequest.h"
34#include "ResourceResponse.h"
35#include "TextEncoding.h"
36#include <wtf/text/Base64.h>
37#include <wtf/text/CString.h>
38#include <wtf/text/StringView.h>
39
40namespace WebCore {
41
42void handleDataURL(ResourceHandle* handle)
43{
44    ASSERT(handle->firstRequest().url().protocolIsData());
45    String url = handle->firstRequest().url().string();
46
47    int index = url.find(',');
48    if (index == -1) {
49        handle->client()->cannotShowURL(handle);
50        return;
51    }
52
53    String mediaType = url.substring(5, index - 5);
54    String data = url.substring(index + 1);
55
56    bool base64 = mediaType.endsWith(";base64", false);
57    if (base64)
58        mediaType = mediaType.left(mediaType.length() - 7);
59
60    if (mediaType.isEmpty())
61        mediaType = "text/plain";
62
63    String mimeType = extractMIMETypeFromMediaType(mediaType);
64    String charset = extractCharsetFromMediaType(mediaType);
65
66    if (charset.isEmpty())
67        charset = "US-ASCII";
68
69    ResourceResponse response;
70    response.setMimeType(mimeType);
71    response.setTextEncodingName(charset);
72    response.setURL(handle->firstRequest().url());
73
74    if (base64) {
75        data = decodeURLEscapeSequences(data);
76        handle->client()->didReceiveResponse(handle, response);
77
78        Vector<char> out;
79        if (base64Decode(data, out, Base64IgnoreWhitespace) && out.size() > 0) {
80            response.setExpectedContentLength(out.size());
81            handle->client()->didReceiveData(handle, out.data(), out.size(), 0);
82        }
83    } else {
84        TextEncoding encoding(charset);
85        data = decodeURLEscapeSequences(data, encoding);
86        handle->client()->didReceiveResponse(handle, response);
87
88        CString encodedData = encoding.encode(data, URLEncodedEntitiesForUnencodables);
89        response.setExpectedContentLength(encodedData.length());
90        if (encodedData.length())
91            handle->client()->didReceiveData(handle, encodedData.data(), encodedData.length(), 0);
92    }
93
94    handle->client()->didFinishLoading(handle, 0);
95}
96
97} // namespace WebCore
98