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    16 ** GNU Lesser General Public License Usage

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    40 ****************************************************************************/

    41 

    42 #include "qplatformdefs.h"

    43 #include "qurl.h"

    44 #include "private/qdataurl_p.h"

    45 

    46 QT_BEGIN_NAMESPACE

    47 

    48 /*!

    49     \internal

    50 

    51     Decode a data: URL into its mimetype and payload. Returns a null string if

    52     the URL could not be decoded.

    53 */

    54 Q_CORE_EXPORT QPair<QString, QByteArray> qDecodeDataUrl(const QUrl &uri)

    55 {

    56     QString mimeType;

    57     QByteArray payload;

    58 

    59     if (uri.scheme() == QLatin1String("data") && uri.host().isEmpty()) {

    60         mimeType = QLatin1String("text/plain;charset=US-ASCII");

    61 

    62         // the following would have been the correct thing, but

    63         // reality often differs from the specification. People have

    64         // data: URIs with ? and #

    65         //QByteArray data = QByteArray::fromPercentEncoding(uri.encodedPath());

    66         QByteArray data = QByteArray::fromPercentEncoding(uri.toEncoded());

    67 

    68         // remove the data: scheme

    69         data.remove(0, 5);

    70 

    71         // parse it:

    72         int pos = data.indexOf(',');

    73         if (pos != -1) {

    74             payload = data.mid(pos + 1);

    75             data.truncate(pos);

    76             data = data.trimmed();

    77 

    78             // find out if the payload is encoded in Base64

    79             if (data.endsWith(";base64")) {

    80                 payload = QByteArray::fromBase64(payload);

    81                 data.chop(7);

    82             }

    83 

    84             if (data.toLower().startsWith("charset")) {

    85                 int i = 7;      // strlen("charset")

    86                 while (data.at(i) == ' ')

    87                     ++i;

    88                 if (data.at(i) == '=')

    89                     data.prepend("text/plain;");

    90             }

    91 

    92             if (!data.isEmpty())

    93                 mimeType = QLatin1String(data.trimmed());

    94 

    95         }

    96     }

    97 

    98     return QPair<QString,QByteArray>(mimeType,payload);

    99 }

   100 

   101 QT_END_NAMESPACE