QHttpPart Class Reference

The QHttpPart class holds a body part to be used inside a HTTP multipart MIME message. More...

#include <qhttpmultipart.h>

Collaboration diagram for QHttpPart:

Public Member Functions
	QHttpPart ()
	Constructs an empty QHttpPart object.
	QHttpPart (const QHttpPart &other)
	Creates a copy of other.
	~QHttpPart ()
	Destroys this QHttpPart.
QHttpPart &	operator= (QHttpPart &&other) noexcept
QHttpPart &	operator= (const QHttpPart &other)
	Creates a copy of other.
void	swap (QHttpPart &other) noexcept
bool	operator== (const QHttpPart &other) const
	Returns true if this object is the same as other (i.e., if they have the same headers and body).
bool	operator!= (const QHttpPart &other) const
	Returns true if this object is not the same as other.
void	setHeader (QNetworkRequest::KnownHeaders header, const QVariant &value)
	Sets the value of the known header header to be value, overriding any previously set headers.
void	setRawHeader (const QByteArray &headerName, const QByteArray &headerValue)
	Sets the header headerName to be of value headerValue.
void	setBody (const QByteArray &body)
	Sets the body of this MIME part to body.
void	setBodyDevice (QIODevice *device)
	Sets the device to read the content from to device.

Friends
class	QHttpMultiPartIODevice

Detailed Description

The QHttpPart class holds a body part to be used inside a HTTP multipart MIME message.

Since

4.8

\inmodule QtNetwork

The QHttpPart class holds a body part to be used inside a HTTP multipart MIME message (which is represented by the QHttpMultiPart class). A QHttpPart consists of a header block and a data block, which are separated by each other by two consecutive new lines. An example for one part would be:

Content-Type: text/plain
Content-Disposition: form-data; name="text"
 
here goes the body

For setting headers, use setHeader() and setRawHeader(), which behave exactly like QNetworkRequest::setHeader() and QNetworkRequest::setRawHeader().

For reading small pieces of data, use setBody(); for larger data blocks like e.g. images, use setBodyDevice(). The latter method saves memory by not copying the data internally, but reading directly from the device. This means that the device must be opened and readable at the moment when the multipart message containing the body part is sent on the network via QNetworkAccessManager::post().

To construct a QHttpPart with a small body, consider the following snippet (this produces the data shown in the example above):

QHttpPart textPart;
textPart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("text/plain"));
textPart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"text\""));
textPart.setBody("here goes the body");

To construct a QHttpPart reading from a device (e.g. a file), the following can be applied:

QHttpPart imagePart;
imagePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("image/jpeg"));
imagePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"image\""));
imagePart.setRawHeader("Content-ID", "my@content.id"); // add any headers you like via setRawHeader()
QFile *file = new QFile("image.jpg");
file->open(QIODevice::ReadOnly);
imagePart.setBodyDevice(file);

Be aware that QHttpPart does not take ownership of the device when set, so it is the developer's responsibility to destroy it when it is not needed anymore. A good idea might be to set the multipart message as parent object for the device, as documented at the documentation for QHttpMultiPart.

See also

QHttpMultiPart, QNetworkAccessManager

Definition at line 23 of file qhttpmultipart.h.

Constructor & Destructor Documentation

QHttpPart() [1/2]

QHttpPart::QHttpPart

(

)

Constructs an empty QHttpPart object.

Definition at line 62 of file qhttpmultipart.cpp.

QHttpPart() [2/2]

QHttpPart::QHttpPart

(

const QHttpPart &

other

)

Creates a copy of other.

Definition at line 69 of file qhttpmultipart.cpp.

~QHttpPart()

QHttpPart::~QHttpPart

(

)

Destroys this QHttpPart.

Definition at line 76 of file qhttpmultipart.cpp.

Member Function Documentation

operator!=()

bool QHttpPart::operator!= ( const QHttpPart &  other ) const

inline

Returns true if this object is not the same as other.

See also

operator==()

Definition at line 35 of file qhttpmultipart.h.

References operator==(), and other().

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operator=() [1/2]

QHttpPart & QHttpPart::operator=

(

const QHttpPart &

other

)

Creates a copy of other.

Definition at line 84 of file qhttpmultipart.cpp.

References other().

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operator=() [2/2]

QHttpPart & QHttpPart::operator= ( QHttpPart &&  other )

inlinenoexcept

Definition at line 29 of file qhttpmultipart.h.

References other(), and swap().

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operator==()

bool QHttpPart::operator==

(

const QHttpPart &

other

)

const

Returns true if this object is the same as other (i.e., if they have the same headers and body).

See also

operator!=()

Definition at line 104 of file qhttpmultipart.cpp.

References other().

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setBody()

void QHttpPart::setBody

(

const QByteArray &

body

)

Sets the body of this MIME part to body.

The body set with this method will be used unless the device is set via setBodyDevice(). For a large amount of data (e.g. an image), use setBodyDevice(), which will not copy the data internally.

See also

setBodyDevice()

Definition at line 154 of file qhttpmultipart.cpp.

References QHttpPartPrivate::setBody().

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setBodyDevice()

void QHttpPart::setBodyDevice

(

QIODevice *

device

)

Sets the device to read the content from to device.

For large amounts of data this method should be preferred over setBody(), because the content is not copied when using this method, but read directly from the device. device must be open and readable. QHttpPart does not take ownership of device, i.e. the device must be closed and destroyed if necessary. if device is sequential (e.g. sockets, but not files), QNetworkAccessManager::post() should be called after device has emitted finished(). For unsetting the device and using data set via setBody(), use "setBodyDevice(0)".

See also

setBody(), QNetworkAccessManager::post()

Definition at line 174 of file qhttpmultipart.cpp.

References device, and QHttpPartPrivate::setBodyDevice().

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setHeader()

void QHttpPart::setHeader	(	QNetworkRequest::KnownHeaders	header,
		const QVariant &	value
	)

Sets the value of the known header header to be value, overriding any previously set headers.

See also

QNetworkRequest::KnownHeaders, setRawHeader(), QNetworkRequest::setHeader()

Definition at line 123 of file qhttpmultipart.cpp.

References header(), and QNetworkHeadersPrivate::setCookedHeader().

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setRawHeader()

void QHttpPart::setRawHeader	(	const QByteArray &	headerName,
		const QByteArray &	headerValue
	)

Sets the header headerName to be of value headerValue.

If headerName corresponds to a known header (see QNetworkRequest::KnownHeaders), the raw format will be parsed and the corresponding "cooked" header will be set as well.

Note

Setting the same header twice overrides the previous setting. To accomplish the behaviour of multiple HTTP headers of the same name, you should concatenate the two values, separating them with a comma (",") and set one single raw header.

See also

QNetworkRequest::KnownHeaders, setHeader(), QNetworkRequest::setRawHeader()

Definition at line 141 of file qhttpmultipart.cpp.

References headerName(), headerValue(), and QNetworkHeadersPrivate::setRawHeader().

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swap()

void QHttpPart::swap ( QHttpPart &  other )

inlinenoexcept

Since

5.0

Swaps this HTTP part with other. This function is very fast and never fails.

Definition at line 32 of file qhttpmultipart.h.

References d, and other().

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Friends And Related Symbol Documentation

QHttpMultiPartIODevice

friend class QHttpMultiPartIODevice

friend

Definition at line 47 of file qhttpmultipart.h.

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The documentation for this class was generated from the following files:

• qtbase/src/network/access/qhttpmultipart.h
• qtbase/src/network/access/qhttpmultipart.cpp