QNetworkRequest

PyQt5.QtNetwork.QNetworkRequest

Description

The QNetworkRequest class holds a request to be sent with QNetworkAccessManager.

QNetworkRequest is part of the Network Access API and is the class holding the information necessary to send a request over the network. It contains a URL and some ancillary information that can be used to modify the request.

See also

QNetworkReply, QNetworkAccessManager.

Enums

Attribute

Attribute codes for the QNetworkRequest and QNetworkReply.

Attributes are extra meta-data that are used to control the behavior of the request and to pass further information from the reply back to the application. Attributes are also extensible, allowing custom implementations to pass custom values.

The following table explains what the default attribute codes are, the QVariant types associated, the default value if said attribute is missing and whether it’s used in requests or replies.

Member	Value	Description
AuthenticationReuseAttribute	12	Requests only, type: Int (default: Automatic) Indicates whether to use cached authorization credentials in the request, if available. If this is set to Manual and the authentication mechanism is ‘Basic’ or ‘Digest’, Qt will not send an an ‘Authorization’ HTTP header with any cached credentials it may have for the request’s URL. This attribute is set to Manual by Qt WebKit when creating a cross-origin XMLHttpRequest where withCredentials has not been set explicitly to true by the Javascript that created the request. See here for more information. (This value was introduced in 4.7.)
AutoDeleteReplyOnFinishAttribute	TODO	TODO
BackgroundRequestAttribute	TODO	Type: Bool (default: false) Indicates that this is a background transfer, rather than a user initiated transfer. Depending on the platform, background transfers may be subject to different policies. The QNetworkSession ConnectInBackground property will be set according to this attribute.
CacheLoadControlAttribute	4	Requests only, type: Int (default: PreferNetwork) Controls how the cache should be accessed. The possible values are those of CacheLoadControl. Note that the default QNetworkAccessManager implementation does not support caching. However, this attribute may be used by certain backends to modify their requests (for example, for caching proxies).
CacheSaveControlAttribute	5	Requests only, type: Bool (default: true) Controls if the data obtained should be saved to cache for future uses. If the value is false, the data obtained will not be automatically cached. If true, data may be cached, provided it is cacheable (what is cacheable depends on the protocol being used).
ConnectionEncryptedAttribute	3	Replies only, type: Bool (default: false) Indicates whether the data was obtained through an encrypted (secure) connection.
CookieLoadControlAttribute	11	Requests only, type: Int (default: Automatic) Indicates whether to send ‘Cookie’ headers in the request. This attribute is set to false by Qt WebKit when creating a cross-origin XMLHttpRequest where withCredentials has not been set explicitly to true by the Javascript that created the request. See here for more information. (This value was introduced in 4.7.)
CookieSaveControlAttribute	13	Requests only, type: Int (default: Automatic) Indicates whether to save ‘Cookie’ headers received from the server in reply to the request. This attribute is set to false by Qt WebKit when creating a cross-origin XMLHttpRequest where withCredentials has not been set explicitly to true by the Javascript that created the request. See here for more information. (This value was introduced in 4.7.)
CustomVerbAttribute	10	Requests only, type: QByteArray Holds the value for the custom HTTP verb to send (destined for usage of other verbs than GET, POST, PUT and DELETE). This verb is set when calling sendCustomRequest().
DoNotBufferUploadDataAttribute	7	Requests only, type: Bool (default: false) Indicates whether the QNetworkAccessManager code is allowed to buffer the upload data, e.g. when doing a HTTP POST. When using this flag with sequential upload data, the ContentLengthHeader header must be set.
EmitAllUploadProgressSignalsAttribute	TODO	Requests only, type: Bool (default: false) Indicates whether all upload signals should be emitted. By default, the uploadProgress signal is emitted only in 100 millisecond intervals. (This value was introduced in 5.5.)
FollowRedirectsAttribute	TODO	Requests only, type: Bool (default: false) Indicates whether the Network Access API should automatically follow a HTTP redirect response or not. Currently redirects that are insecure, that is redirecting from “https” to “http” protocol, are not allowed. (This value was introduced in 5.6.)
HTTP2AllowedAttribute	TODO	Requests only, type: Bool (default: false) Indicates whether the QNetworkAccessManager code is allowed to use HTTP/2 with this request. This applies to SSL requests or ‘cleartext’ HTTP/2.
Http2DirectAttribute	TODO	Requests only, type: Bool (default: false) If set, this attribute will force QNetworkAccessManager to use HTTP/2 protocol without initial HTTP/2 protocol negotiation. Use of this attribute implies prior knowledge that a particular server supports HTTP/2. The attribute works with SSL or ‘cleartext’ HTTP/2. If a server turns out to not support HTTP/2, when HTTP/2 direct was specified, QNetworkAccessManager gives up, without attempting to fall back to HTTP/1.1. If both HTTP2AllowedAttribute and Http2DirectAttribute are set, Http2DirectAttribute takes priority. (This value was introduced in 5.11.)
HTTP2WasUsedAttribute	TODO	Replies only, type: Bool (default: false) Indicates whether HTTP/2 was used for receiving this reply. (This value was introduced in 5.9.)
HttpPipeliningAllowedAttribute	8	Requests only, type: Bool (default: false) Indicates whether the QNetworkAccessManager code is allowed to use HTTP pipelining with this request.
HttpPipeliningWasUsedAttribute	9	Replies only, type: Bool Indicates whether the HTTP pipelining was used for receiving this reply.
HttpReasonPhraseAttribute	1	Replies only, type: QByteArray (no default) Indicates the HTTP reason phrase as received from the HTTP server (like “Ok”, “Found”, “Not Found”, “Access Denied”, etc.) This is the human-readable representation of the status code (see above). If the connection was not HTTP-based, this attribute will not be present.
HttpStatusCodeAttribute	0	Replies only, type: Int (no default) Indicates the HTTP status code received from the HTTP server (like 200, 304, 404, 401, etc.). If the connection was not HTTP-based, this attribute will not be present.
OriginalContentLengthAttribute	TODO	Replies only, type Int Holds the original content-length attribute before being invalidated and removed from the header when the data is compressed and the request was marked to be decompressed automatically. (This value was introduced in 5.9.)
RedirectionTargetAttribute	2	Replies only, type: QUrl (no default) If present, it indicates that the server is redirecting the request to a different URL. The Network Access API does not by default follow redirections: the application can determine if the requested redirection should be allowed, according to its security policies, or it can set QNetworkRequest::FollowRedirectsAttribute to true (in which case the redirection will be followed and this attribute will not be present in the reply). The returned URL might be relative. Use resolved() to create an absolute URL out of it.
RedirectPolicyAttribute	TODO	Requests only, type: Int, should be one of the QNetworkRequest::RedirectPolicy values (default: ManualRedirectPolicy). This attribute obsoletes FollowRedirectsAttribute. (This value was introduced in 5.9.)
SourceIsFromCacheAttribute	6	Replies only, type: Bool (default: false) Indicates whether the data was obtained from cache or not.
SpdyAllowedAttribute	TODO	Requests only, type: Bool (default: false) Indicates whether the QNetworkAccessManager code is allowed to use SPDY with this request. This applies only to SSL requests, and depends on the server supporting SPDY.
SpdyWasUsedAttribute	TODO	Replies only, type: Bool Indicates whether SPDY was used for receiving this reply.
User	1000	Special type. Additional information can be passed in QVariants with types ranging from User to . The default implementation of Network Access will ignore any request attributes in this range and it will not produce any attributes in this range in replies. The range is reserved for extensions of QNetworkAccessManager.
UserMax	32767	Special type. See User.

---

CacheLoadControl

Controls the caching mechanism of QNetworkAccessManager.

Member	Value	Description
AlwaysCache	3	only load from cache, indicating error if the item was not cached (i.e., off-line mode)
AlwaysNetwork	0	always load from network and do not check if the cache has a valid entry (similar to the “Reload” feature in browsers); in addition, force intermediate caches to re-validate.
PreferCache	2	load from cache if available, otherwise load from network. Note that this can return possibly stale (but not expired) items from cache.
PreferNetwork	1	default value; load from the network if the cached entry is older than the network entry. This will never return stale data from the cache, but revalidate resources that have become stale.

---

KnownHeaders

List of known header types that QNetworkRequest parses. Each known header is also represented in raw form with its full HTTP name.

See also

header(), setHeader(), rawHeader(), setRawHeader().

Member	Value	Description
ContentDispositionHeader	6	Corresponds to the HTTP Content-Disposition header and contains a string containing the disposition type (for instance, attachment) and a parameter (for instance, filename).
ContentLengthHeader	1	Corresponds to the HTTP Content-Length header and contains the length in bytes of the data transmitted.
ContentTypeHeader	0	Corresponds to the HTTP Content-Type header and contains a string containing the media (MIME) type and any auxiliary data (for instance, charset).
CookieHeader	4	Corresponds to the HTTP Cookie header and contains a QList<QNetworkCookie> representing the cookies to be sent back to the server.
ETagHeader	TODO	Corresponds to the HTTP ETag header and contains a QString representing the last modification state of the contents.
IfMatchHeader	TODO	Corresponds to the HTTP If-Match header and contains a QStringList. It is usually added to a QNetworkRequest. The server shall send a 412 (Precondition Failed) response if the resource does not match.
IfModifiedSinceHeader	TODO	Corresponds to the HTTP If-Modified-Since header and contains a QDateTime. It is usually added to a QNetworkRequest. The server shall send a 304 (Not Modified) response if the resource has not changed since this time.
IfNoneMatchHeader	TODO	Corresponds to the HTTP If-None-Match header and contains a QStringList. It is usually added to a QNetworkRequest. The server shall send a 304 (Not Modified) response if the resource does match.
LastModifiedHeader	3	Corresponds to the HTTP Last-Modified header and contains a QDateTime representing the last modification date of the contents.
LocationHeader	2	Corresponds to the HTTP Location header and contains a URL representing the actual location of the data, including the destination URL in case of redirections.
ServerHeader	TODO	The Server header received by HTTP clients.
SetCookieHeader	5	Corresponds to the HTTP Set-Cookie header and contains a QList<QNetworkCookie> representing the cookies sent by the server to be stored locally.
UserAgentHeader	TODO	The User-Agent header sent by HTTP clients.

---

LoadControl

Indicates if an aspect of the request’s loading mechanism has been manually overridden, e.g. by Qt WebKit.

Member	Value	Description
Automatic	0	default value: indicates default behaviour.
Manual	1	indicates behaviour has been manually overridden.

---

Priority

This enum lists the possible network request priorities.

Member	Value	Description
HighPriority	1	High priority
LowPriority	5	Low priority
NormalPriority	3	Normal priority

---

RedirectPolicy

TODO

Member	Value	Description
ManualRedirectPolicy	TODO	TODO
NoLessSafeRedirectPolicy	TODO	TODO
SameOriginRedirectPolicy	TODO	TODO
UserVerifiedRedirectPolicy	TODO	TODO

Methods

__init__(url: QUrl = QUrl())

Constructs a QNetworkRequest object with url as the URL to be requested.

See also

url(), setUrl().

---

__init__(QNetworkRequest)

Creates a copy of other.

---

attribute(Attribute, defaultValue: Any = None) → Any

Returns the attribute associated with the code code. If the attribute has not been set, it returns defaultValue.

Note: This function does not apply the defaults listed in Attribute.

See also

setAttribute(), Attribute.

---

__eq__(QNetworkRequest) → bool

TODO

---

hasRawHeader(Union[QByteArray, bytes, bytearray]) → bool

Returns true if the raw header headerName is present in this network request.

See also

rawHeader(), setRawHeader().

---

header(KnownHeaders) → Any

Returns the value of the known network header header if it is present in this request. If it is not present, returns QVariant() (i.e., an invalid variant).

See also

KnownHeaders, rawHeader(), setHeader().

---

http2Configuration() → QHttp2Configuration

TODO

---

maximumRedirectsAllowed() → int

TODO

---

__ne__(QNetworkRequest) → bool

TODO

---

originatingObject() → QObject

Returns a reference to the object that initiated this network request; returns 0 if not set or the object has been destroyed.

See also

setOriginatingObject().

---

peerVerifyName() → str

TODO

---

priority() → Priority

Return the priority of this request.

See also

setPriority().

---

rawHeader(Union[QByteArray, bytes, bytearray]) → QByteArray

Returns the raw form of header headerName. If no such header is present, an empty QByteArray is returned, which may be indistinguishable from a header that is present but has no content (use hasRawHeader() to find out if the header exists or not).

Raw headers can be set with setRawHeader() or with setHeader().

See also

header(), setRawHeader().

---

rawHeaderList() → List[QByteArray]

Returns a list of all raw headers that are set in this network request. The list is in the order that the headers were set.

See also

hasRawHeader(), rawHeader().

---

setAttribute(Attribute, Any)

Sets the attribute associated with code code to be value value. If the attribute is already set, the previous value is discarded. In special, if value is an invalid QVariant, the attribute is unset.

See also

attribute(), Attribute.

---

setHeader(KnownHeaders, Any)

Sets the value of the known header header to be value, overriding any previously set headers. This operation also sets the equivalent raw HTTP header.

See also

KnownHeaders, setRawHeader(), header().

---

setHttp2Configuration(QHttp2Configuration)

TODO

---

setMaximumRedirectsAllowed(int)

TODO

---

setOriginatingObject(QObject)

Allows setting a reference to the object initiating the request.

For example Qt WebKit sets the originating object to the QWebFrame that initiated the request.

See also

originatingObject().

---

setPeerVerifyName(str)

TODO

---

setPriority(Priority)

Set the priority of this request to priority.

Note: The priority is only a hint to the network access manager. It can use it or not. Currently it is used for HTTP to decide which request should be sent first to a server.

See also

priority().

---

setRawHeader(Union[QByteArray, bytes, bytearray], Union[QByteArray, bytes, bytearray])

Sets the header headerName to be of value headerValue. If headerName corresponds to a known header (see KnownHeaders), the raw format will be parsed and the corresponding “cooked” header will be set as well.

For example:

# request.setRawHeader(QByteArray("Last-Modified"), QByteArray("Sun, 06 Nov 1994 08:49:37 GMT"));

will also set the known header LastModifiedHeader to be the QDateTime object of the parsed date.

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

KnownHeaders, setHeader(), hasRawHeader(), rawHeader().

---

setSslConfiguration(QSslConfiguration)

Sets this network request’s SSL configuration to be config. The settings that apply are the private key, the local certificate, the SSL protocol (SSLv2, SSLv3, TLSv1.0 where applicable), the CA certificates and the ciphers that the SSL backend is allowed to use.

See also

sslConfiguration(), defaultConfiguration().

---

setUrl(QUrl)

Sets the URL this network request is referring to be url.

See also

url().

---

sslConfiguration() → QSslConfiguration

Returns this network request’s SSL configuration. By default this is the same as defaultConfiguration().

See also

setSslConfiguration(), defaultConfiguration().

---

swap(QNetworkRequest)

TODO

---

url() → QUrl

Returns the URL this network request is referring to.

See also

setUrl().