An item that is responsible for fetching an index file of {{{ package list diffs and starting the package list's download. More...

#include <acquire-item.h>

Inheritance diagram for pkgAcqDiffIndex:

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Collaboration diagram for pkgAcqDiffIndex:

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Public Types
enum	ItemState { StatIdle, StatFetching, StatDone, StatError, StatAuthError, StatTransientNetworkError }
	The current status of this item. More...

Public Member Functions
	pkgAcqDiffIndex (pkgAcquire *Owner, std::string URI, std::string URIDesc, std::string ShortDesc, HashString ExpectedHash)
	Create a new pkgAcqDiffIndex. More...

void	AddWeakPointer (WeakPointable **weakptr)
	Add a new weak pointer. More...

virtual std::string	Custom600Headers ()
	Custom headers to be sent to the fetch process. More...

virtual std::string	DescURI ()
	A "descriptive" URI-like string. More...

virtual void	Done (std::string Message, unsigned long long Size, std::string Md5Hash, pkgAcquire::MethodConfig *Cnf)
	Invoked by the acquire worker when the object was fetched successfully. More...

virtual void	Failed (std::string Message, pkgAcquire::MethodConfig *Cnf)
	Invoked by the acquire worker when the object couldn't be fetched. More...

virtual void	Finished ()
	Invoked by the worker when the download is completely done. More...

pkgAcquire *	GetOwner ()

virtual std::string	HashSum ()
	HashSum. More...

virtual bool	IsTrusted ()

bool	ParseDiffIndex (std::string IndexDiffFile)
	Parse the Index file for a set of Packages diffs. More...

void	RemoveWeakPointer (WeakPointable **weakptr)
	Remove the weak pointer from the list of weak pointers. More...

void	ReportMirrorFailure (std::string FailCode)
	Report mirror problem. More...

virtual std::string	ShortDesc ()
	Short item description. More...

virtual void	Start (std::string Message, unsigned long long Size)
	Invoked when the worker starts to fetch this object. More...

Public Attributes
bool	Complete
	If true, the entire object has been successfully fetched. More...

std::string	DestFile
	The name of the file into which the retrieved object will be written. More...

std::string	ErrorText
	Contains a textual description of the error encountered if Status is StatError or StatAuthError. More...

unsigned long long	FileSize
	The size of the object to fetch. More...

unsigned long	ID
	A client-supplied unique identifier. More...

bool	Local
	If true, the URI of this object is "local". More...

const char *	Mode
	If not NULL, contains the name of a subprocess that is operating on this object (for instance, "gzip" or "gpgv"). More...

unsigned long long	PartialSize
	How much of the object was already fetched. More...

unsigned int	QueueCounter
	The number of fetch queues into which this item has been inserted. More...

enum pkgAcquire::Item::ItemState	Status

std::string	UsedMirror

Protected Member Functions
void	Dequeue ()
	Remove this item from its owner's queue. More...

void	QueueURI (ItemDesc &Item)
	Insert this item into its owner's queue. More...

void	Rename (std::string From, std::string To)
	Rename a file without modifying its timestamp. More...

Protected Attributes
std::string	CurrentPackagesFile
	The index file which will be patched to generate the new file. More...

bool	Debug
	If true, debugging information will be written to std::clog. More...

pkgAcquire::ItemDesc	Desc
	The item that is currently being downloaded. More...

std::string	Description
	A description of the Packages file (stored in pkgAcquire::ItemDesc::Description). More...

HashString	ExpectedHash
	The Hash that the real index file should have after all patches have been applied. More...

pkgAcquire *	Owner
	The acquire object with which this item is associated. More...

std::string	RealURI
	The URI of the index file to recreate at our end (either by downloading it or by applying partial patches). More...

Detailed Description

An item that is responsible for fetching an index file of {{{ package list diffs and starting the package list's download.

This item downloads the Index file and parses it, then enqueues additional downloads of either the individual patches (using pkgAcqIndexDiffs) or the entire Packages file (using pkgAcqIndex).

See Also: pkgAcqIndexDiffs, pkgAcqIndex

Member Enumeration Documentation

enum pkgAcquire::Item::ItemState

inherited

The current status of this item.

Enumerator
StatIdle	The item is waiting to be downloaded.
StatFetching	The item is currently being downloaded.
StatDone	The item has been successfully downloaded.
StatError	An error was encountered while downloading this item.
StatAuthError	The item was downloaded but its authenticity could not be verified.
StatTransientNetworkError	The item was could not be downloaded because of a transient network error (e.g. network down)

Constructor & Destructor Documentation

pkgAcqDiffIndex::pkgAcqDiffIndex	(	pkgAcquire *	Owner,
		std::string	URI,
		std::string	URIDesc,
		std::string	ShortDesc,
		HashString	ExpectedHash
	)

Create a new pkgAcqDiffIndex.

Parameters

Owner	The Acquire object that owns this item.
URI	The URI of the list file to download.
URIDesc	A long description of the list file to download.
ShortDesc	A short description of the list file to download.
ExpectedHash	The list file's MD5 signature.

Member Function Documentation

void WeakPointable::AddWeakPointer ( WeakPointable ** weakptr )

inlineinherited

Add a new weak pointer.

References WeakPointable::pointers.

virtual std::string pkgAcqDiffIndex::Custom600Headers ( )

virtual

Custom headers to be sent to the fetch process.

Returns: a string containing RFC822-style headers that are to be inserted into the 600 URI Acquire message sent to the fetch subprocess. The headers are inserted after a newline-less line, so they should (if nonempty) have a leading newline and no trailing newline.

Reimplemented from pkgAcquire::Item.

void pkgAcquire::Item::Dequeue ( )

inlineprotectedinherited

Remove this item from its owner's queue.

References pkgAcquire::Dequeue(), and pkgAcquire::Item::Owner.

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virtual std::string pkgAcqDiffIndex::DescURI ( )

inlinevirtual

A "descriptive" URI-like string.

Returns: a URI that should be used to describe what is being fetched.

Implements pkgAcquire::Item.

References RealURI.

virtual void pkgAcqDiffIndex::Done	(	std::string	Message,
		unsigned long long	Size,
		std::string	Hash,
		pkgAcquire::MethodConfig *	Cnf
	)

virtual

Invoked by the acquire worker when the object was fetched successfully.

Note that the object might not have been written to DestFile; check for the presence of an Alt-Filename entry in Message to find the file to which it was really written.

Done is often used to switch from one stage of the processing to the next (e.g. fetching, unpacking, copying). It is one branch of the continuation of the fetch process.

Parameters

Message	Data from the acquire method. Use LookupTag() to parse it.
Size	The size of the object that was fetched.
Hash	The HashSum of the object that was fetched.
Cnf	The method via which the object was fetched.

See Also: pkgAcqMethod

Reimplemented from pkgAcquire::Item.

virtual void pkgAcqDiffIndex::Failed	(	std::string	Message,
		pkgAcquire::MethodConfig *	Cnf
	)

virtual

Invoked by the acquire worker when the object couldn't be fetched.

This is a branch of the continuation of the fetch process.

Parameters

Message	An RFC822-formatted message from the acquire method describing what went wrong. Use LookupTag() to parse it.
Cnf	The method via which the worker tried to fetch this object.

See Also: pkgAcqMethod

Reimplemented from pkgAcquire::Item.

virtual void pkgAcquire::Item::Finished ( )

inlinevirtualinherited

Invoked by the worker when the download is completely done.

Reimplemented in pkgAcqArchive.

pkgAcquire* pkgAcquire::Item::GetOwner ( )

inlineinherited

Returns: the acquire process with which this item is associated.

References pkgAcquire::Item::Owner.

virtual std::string pkgAcquire::Item::HashSum ( )

inlinevirtualinherited

HashSum.

Returns: the HashSum of this object, if applicable; otherwise, an empty string.

Reimplemented in pkgAcqFile, pkgAcqArchive, and pkgAcqIndex.

virtual bool pkgAcquire::Item::IsTrusted ( )

inlinevirtualinherited

Returns: true if this object is being fetched from a trusted source.

Reimplemented in pkgAcqArchive.

bool pkgAcqDiffIndex::ParseDiffIndex ( std::string IndexDiffFile )

Parse the Index file for a set of Packages diffs.

Parses the Index file and creates additional download items as necessary.

Parameters

IndexDiffFile The name of the Index file.

Returns: true if the Index file was successfully parsed, false otherwise.

void pkgAcquire::Item::QueueURI ( ItemDesc & Item )

inlineprotectedinherited

Insert this item into its owner's queue.

Parameters

ItemDesc Metadata about this item (its URI and description).

References pkgAcquire::Enqueue(), and pkgAcquire::Item::Owner.

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void WeakPointable::RemoveWeakPointer ( WeakPointable ** weakptr )

inlineinherited

Remove the weak pointer from the list of weak pointers.

References WeakPointable::pointers.

void pkgAcquire::Item::Rename	(	std::string	From,
		std::string	To
	)

protectedinherited

Rename a file without modifying its timestamp.

Many item methods call this as their final action.

Parameters

From	The file to be renamed.
To	The new name of #From. If #To exists it will be overwritten.

void pkgAcquire::Item::ReportMirrorFailure ( std::string FailCode )

inherited

Report mirror problem.

This allows reporting mirror failures back to a centralized server. The apt-report-mirror-failure script is called for this

Parameters

FailCode A short failure string that is send

virtual std::string pkgAcquire::Item::ShortDesc ( )

inlinevirtualinherited

Short item description.

Returns: a brief description of the object being fetched.

Reimplemented in pkgAcqArchive.

References pkgAcquire::Item::DescURI().

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virtual void pkgAcquire::Item::Start	(	std::string	Message,
		unsigned long long	Size
	)

virtualinherited

Invoked when the worker starts to fetch this object.

Parameters

Message	RFC822-formatted data from the worker process. Use LookupTag() to parse it.
Size	The size of the object being fetched.

See Also: pkgAcqMethod

Member Data Documentation

bool pkgAcquire::Item::Complete

inherited

If true, the entire object has been successfully fetched.

Subclasses should set this to true when appropriate.

std::string pkgAcqDiffIndex::CurrentPackagesFile

protected

The index file which will be patched to generate the new file.

bool pkgAcqDiffIndex::Debug

protected

If true, debugging information will be written to std::clog.

pkgAcquire::ItemDesc pkgAcqDiffIndex::Desc

protected

The item that is currently being downloaded.

std::string pkgAcqDiffIndex::Description

protected

A description of the Packages file (stored in pkgAcquire::ItemDesc::Description).

std::string pkgAcquire::Item::DestFile

inherited

The name of the file into which the retrieved object will be written.

std::string pkgAcquire::Item::ErrorText

inherited

Contains a textual description of the error encountered if Status is StatError or StatAuthError.

HashString pkgAcqDiffIndex::ExpectedHash

protected

The Hash that the real index file should have after all patches have been applied.

unsigned long long pkgAcquire::Item::FileSize

inherited

The size of the object to fetch.

unsigned long pkgAcquire::Item::ID

inherited

A client-supplied unique identifier.

This field is initalized to 0; it is meant to be filled in by clients that wish to use it to uniquely identify items.

Todo:: it's unused in apt itself

bool pkgAcquire::Item::Local

inherited

If true, the URI of this object is "local".

The only effect of this field is to exclude the object from the download progress indicator's overall statistics.

const char* pkgAcquire::Item::Mode

inherited

If not NULL, contains the name of a subprocess that is operating on this object (for instance, "gzip" or "gpgv").

pkgAcquire* pkgAcquire::Item::Owner

protectedinherited

The acquire object with which this item is associated.

Referenced by pkgAcquire::Item::Dequeue(), pkgAcquire::Item::GetOwner(), and pkgAcquire::Item::QueueURI().

unsigned long long pkgAcquire::Item::PartialSize

inherited

How much of the object was already fetched.

unsigned int pkgAcquire::Item::QueueCounter

inherited

The number of fetch queues into which this item has been inserted.

There is one queue for each source from which an item could be downloaded.

See Also: pkgAcquire

std::string pkgAcqDiffIndex::RealURI

protected

The URI of the index file to recreate at our end (either by downloading it or by applying partial patches).

Referenced by DescURI().

enum pkgAcquire::Item::ItemState pkgAcquire::Item::Status

inherited

std::string pkgAcquire::Item::UsedMirror

inherited

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

/usr/include/apt-pkg/acquire-item.h

Public Types

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation