| 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 | QByteArray data = QByteArray::fromPercentEncoding(pctEncoded: uri.url(options: QUrl::FullyEncoded | QUrl::RemoveScheme).toLatin1()); |
| 30 | |
| 31 | // parse it: |
| 32 | const qsizetype pos = data.indexOf(c: ','); |
| 33 | if (pos != -1) { |
| 34 | payload = data.mid(index: pos + 1); |
| 35 | data.truncate(pos); |
| 36 | data = data.trimmed(); |
| 37 | |
| 38 | // find out if the payload is encoded in Base64 |
| 39 | if (QLatin1StringView{data}.endsWith(s: ";base64"_L1, cs: Qt::CaseInsensitive)) { |
| 40 | payload = QByteArray::fromBase64(base64: payload); |
| 41 | data.chop(n: 7); |
| 42 | } |
| 43 | |
| 44 | if (QLatin1StringView{data}.startsWith(s: "charset"_L1, cs: Qt::CaseInsensitive)) { |
| 45 | qsizetype i = 7; // strlen("charset") |
| 46 | while (data.at(i) == ' ') |
| 47 | ++i; |
| 48 | if (data.at(i) == '=') |
| 49 | data.prepend(s: "text/plain;"); |
| 50 | } |
| 51 | |
| 52 | if (!data.isEmpty()) |
| 53 | mimeType = QString::fromLatin1(ba: data.trimmed()); |
| 54 | |
| 55 | } |
| 56 | |
| 57 | return true; |
| 58 | } |
| 59 | |
| 60 | QT_END_NAMESPACE |
| 61 |