| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
| 3 | |
| 4 | #include "qplatformdefs.h" |
| 5 | #include "qurl.h" |
| 6 | #include "private/qdataurl_p.h" |
| 7 | |
| 8 | QT_BEGIN_NAMESPACE |
| 9 | |
| 10 | using namespace Qt::Literals; |
| 11 | |
| 12 | /*! |
| 13 | \internal |
| 14 | |
| 15 | Decode a data: URL into its mimetype and payload. Returns a null string if |
| 16 | the URL could not be decoded. |
| 17 | */ |
| 18 | Q_CORE_EXPORT bool qDecodeDataUrl(const QUrl &uri, QString &mimeType, QByteArray &payload) |
| 19 | { |
| 20 | if (uri.scheme() != "data"_L1|| !uri.host().isEmpty()) |
| 21 | return false; |
| 22 | |
| 23 | mimeType = QStringLiteral("text/plain;charset=US-ASCII"); |
| 24 | |
| 25 | // the following would have been the correct thing, but |
| 26 | // reality often differs from the specification. People have |
| 27 | // data: URIs with ? and # |
| 28 | //QByteArray data = QByteArray::fromPercentEncoding(uri.path(QUrl::FullyEncoded).toLatin1()); |
| 29 | const QByteArray dataArray = |
| 30 | QByteArray::fromPercentEncoding(pctEncoded: uri.url(options: QUrl::FullyEncoded | QUrl::RemoveScheme).toLatin1()); |
| 31 | QByteArrayView data = dataArray; |
| 32 | |
| 33 | // parse it: |
| 34 | const qsizetype pos = data.indexOf(ch: ','); |
| 35 | if (pos != -1) { |
| 36 | payload = data.mid(pos: pos + 1).toByteArray(); |
| 37 | data.truncate(n: pos); |
| 38 | data = data.trimmed(); |
| 39 | |
| 40 | // find out if the payload is encoded in Base64 |
| 41 | constexpr auto base64 = ";base64"_L1; |
| 42 | if (QLatin1StringView{data}.endsWith(s: base64, cs: Qt::CaseInsensitive)) { |
| 43 | payload = QByteArray::fromBase64(base64: payload); |
| 44 | data.chop(n: base64.size()); |
| 45 | } |
| 46 | |
| 47 | QLatin1StringView textPlain; |
| 48 | constexpr auto charset = "charset"_L1; |
| 49 | if (QLatin1StringView{data}.startsWith(s: charset, cs: Qt::CaseInsensitive)) { |
| 50 | qsizetype i = charset.size(); |
| 51 | while (data.at(n: i) == ' ') |
| 52 | ++i; |
| 53 | if (data.at(n: i) == '=') |
| 54 | textPlain = "text/plain;"_L1; |
| 55 | } |
| 56 | |
| 57 | if (!data.isEmpty()) |
| 58 | mimeType = textPlain + QLatin1StringView(data.trimmed()); |
| 59 | } |
| 60 | |
| 61 | return true; |
| 62 | } |
| 63 | |
| 64 | QT_END_NAMESPACE |
| 65 |