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39
40#include "qplatformdefs.h"
41#include "qurl.h"
42#include "private/qdataurl_p.h"
43
44QT_BEGIN_NAMESPACE
45
46/*!
47 \internal
48
49 Decode a data: URL into its mimetype and payload. Returns a null string if
50 the URL could not be decoded.
51*/
52Q_CORE_EXPORT bool qDecodeDataUrl(const QUrl &uri, QString &mimeType, QByteArray &payload)
53{
54 if (uri.scheme() != QLatin1String("data") || !uri.host().isEmpty())
55 return false;
56
57 mimeType = QLatin1String("text/plain;charset=US-ASCII");
58
59 // the following would have been the correct thing, but
60 // reality often differs from the specification. People have
61 // data: URIs with ? and #
62 //QByteArray data = QByteArray::fromPercentEncoding(uri.path(QUrl::FullyEncoded).toLatin1());
63 QByteArray data = QByteArray::fromPercentEncoding(pctEncoded: uri.url(options: QUrl::FullyEncoded | QUrl::RemoveScheme).toLatin1());
64
65 // parse it:
66 int pos = data.indexOf(c: ',');
67 if (pos != -1) {
68 payload = data.mid(index: pos + 1);
69 data.truncate(pos);
70 data = data.trimmed();
71
72 // find out if the payload is encoded in Base64
73 if (data.endsWith(c: ";base64")) {
74 payload = QByteArray::fromBase64(base64: payload);
75 data.chop(n: 7);
76 }
77
78 if (data.toLower().startsWith(c: "charset")) {
79 int i = 7; // strlen("charset")
80 while (data.at(i) == ' ')
81 ++i;
82 if (data.at(i) == '=')
83 data.prepend(s: "text/plain;");
84 }
85
86 if (!data.isEmpty())
87 mimeType = QLatin1String(data.trimmed());
88
89 }
90
91 return true;
92}
93
94QT_END_NAMESPACE
95

source code of qtbase/src/corelib/io/qdataurl.cpp