/**
* @brief Create an AWS V3 Signature canonical headers string.
*
* This function constructs a canonical string containing all of the headers
* in the given request.
*
* @note \p request will typically not include a `Host` header at this stage,
* however Qt will add an appropriate `Host` header when the request is
* performed. So, if \p request does not include a `Host` header yet,
* this function will include a derived `Host` header in the canonical
* headers to allow for it.
*
* @note This function is only applicable to the `AWS3` format, not `AWS3-HTTPS`.
*
* @param[in] request The network request to fetch the canonical headers from.
* @param[out] signedHeaders A semi-colon separated list of the names of all headers
* included in the result.
*
* @return An AWS V3 Signature canonical headers string.
*
* @see http://docs.aws.amazon.com/general/latest/gr/sigV3-create-canonical-request.html
* @see canonicalHeader
*/
QByteArray AwsSignatureV3Private::canonicalHeaders(const QNetworkRequest &request, QByteArray * const signedHeaders) const
{
Q_CHECK_PTR(signedHeaders);
signedHeaders->clear();
/* Note, Amazon says we should combine duplicate headers with comma separators...
* conveniently for us, QNetworkRequest requires that to have been done already.
* See note in QNetworkRequest::setRawHeader.
*/
// Convert the raw headers list to a map to sort on (lowercased) header names only.
QMap<QByteArray,QByteArray> headers;
foreach (const QByteArray &rawHeader, request.rawHeaderList()) {
headers.insert(rawHeader.toLower(), request.rawHeader(rawHeader));
}
// The "host" header is not included in QNetworkRequest::rawHeaderList, but will be sent by Qt.
headers.insert("host", request.url().host().toUtf8());
// Convert the headers map to a canonical string, keeping track of which headers we've included too.
QByteArray canonicalHeaders;
for (QMap<QByteArray,QByteArray>::const_iterator iter = headers.constBegin(); iter != headers.constEnd(); ++iter) {
// Only include "host" and "x-amz-*" headers. Note, Amazon documentation states that latter as
// "x-amz-" (ie with the trailing '-'), yet the official Amazon Java SDK tests for a "x-amz"
// prefix. Thus the Java SDK would include headers with keys like "x-amzfoo", but here we do not
// since that would disagree with the official documentation.
if ((iter.key() == "host") || (iter.key().startsWith("x-amz-"))) {
canonicalHeaders += canonicalHeader(iter.key(), iter.value()) + '\n';
if (!signedHeaders->isEmpty()) *signedHeaders += ';';
*signedHeaders += iter.key();
}
}
return canonicalHeaders;
}
/**
* @brief Create an AWS V4 Signature canonical headers string.
*
* This function constructs a canonical string containing all of the headers
* in the given request.
*
* @note \p request will typically not include a `Host` header at this stage,
* however Qt will add an appropriate `Host` header when the request is
* performed. So, if \p request does not include a `Host` header yet,
* this function will include a derived `Host` header in the canonical
* headers to allow for it.
*
* @param[in] request The network request to fetch the canonical headers from.
* @param[out] signedHeaders A semi-colon separated list of the names of all headers
* included in the result.
*
* @return An AWS V4 Signature canonical headers string.
*
* @see http://docs.aws.amazon.com/general/latest/gr/sigv4-create-canonical-request.html
* @see canonicalHeader
*/
QByteArray AwsSignatureV4Private::canonicalHeaders(const QNetworkRequest &request, QByteArray * const signedHeaders) const
{
Q_CHECK_PTR(signedHeaders);
signedHeaders->clear();
/* Note, Amazon says we should combine duplicate headers with comma separators...
* conveniently for us, QNetworkRequest requires that to have been done already.
* See note in QNetworkRequest::setRawHeader.
*/
// Convert the raw headers list to a map to sort on (lowercased) header names only.
QMap<QByteArray,QByteArray> headers;
foreach (const QByteArray &rawHeader, request.rawHeaderList()) {
headers.insert(rawHeader.toLower(), request.rawHeader(rawHeader));
}
// The "host" header is not included in QNetworkRequest::rawHeaderList, but will be sent by Qt.
headers.insert("host", request.url().host().toUtf8());
// Convert the headers map to a canonical string, keeping track of which headers we've included too.
QByteArray canonicalHeaders;
for (QMap<QByteArray,QByteArray>::const_iterator iter = headers.constBegin(); iter != headers.constEnd(); ++iter) {
canonicalHeaders += canonicalHeader(iter.key(), iter.value()) + '\n';
if (!signedHeaders->isEmpty()) *signedHeaders += ';';
*signedHeaders += iter.key();
}
return canonicalHeaders;
}