apt @VERSION@
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The Acquire system is responsible for retrieving files from local or remote URIs and postprocessing them (for instance, verifying their authenticity). The core class in this system is pkgAcquire, which is responsible for managing the download queues during the download. There is at least one download queue for each supported protocol; protocols such as http may provide one queue per host. More...
Classes | |
class | pkgAcquire::Item |
Represents the process by which a pkgAcquire object should {{{ retrieve a file or a collection of files. More... | |
struct | DiffInfo |
Information about an index patch (aka diff). More... | |
class | pkgAcqSubIndex |
An item that is responsible for fetching a SubIndex {{{. More... | |
class | pkgAcqDiffIndex |
An item that is responsible for fetching an index file of {{{ package list diffs and starting the package list's download. More... | |
class | pkgAcqIndexDiffs |
An item that is responsible for fetching all the patches {{{ that need to be applied to a given package index file. More... | |
class | pkgAcqIndex |
An acquire item that is responsible for fetching an index {{{ file (e.g., Packages or Sources). More... | |
class | pkgAcqIndexTrans |
An acquire item that is responsible for fetching a {{{ translated index file. More... | |
struct | IndexTarget |
Information about an index file. More... | |
struct | OptionalIndexTarget |
Information about an optional index file. More... | |
class | pkgAcqMetaSig |
An acquire item that downloads the detached signature {{{ of a meta-index (Release) file, then queues up the release file itself. More... | |
class | pkgAcqMetaIndex |
An item that is responsible for downloading the meta-index {{{ file (i.e., Release) itself and verifying its signature. More... | |
class | pkgAcqMetaClearSig |
An item repsonsible for downloading clearsigned metaindexes {{{. More... | |
class | pkgAcqArchive |
An item that is responsible for fetching a package file. {{{. More... | |
class | pkgAcqFile |
Retrieve an arbitrary file to the current directory. {{{. More... | |
class | pkgAcqMethod |
class | pkgAcquire::Worker |
A fetch subprocess. More... | |
class | pkgAcquire |
The core download scheduler. {{{. More... | |
struct | pkgAcquire::ItemDesc |
Represents a single download source from which an item should be downloaded. More... | |
class | pkgAcquire::Queue |
A single download queue in a pkgAcquire object. {{{. More... | |
class | pkgAcquire::UriIterator |
Iterates over all the URIs being fetched by a pkgAcquire object. {{{. More... | |
struct | pkgAcquire::MethodConfig |
Information about the properties of a single acquire method. {{{. More... | |
class | pkgAcquireStatus |
A monitor object for downloads controlled by the pkgAcquire class. {{{. More... | |
Files | |
file | acquire-item.h |
file | acquire-method.h |
file | acquire-worker.h |
file | acquire.h |
The Acquire system is responsible for retrieving files from local or remote URIs and postprocessing them (for instance, verifying their authenticity). The core class in this system is pkgAcquire, which is responsible for managing the download queues during the download. There is at least one download queue for each supported protocol; protocols such as http may provide one queue per host.
Each file to download is represented by a subclass of pkgAcquire::Item. The files add themselves to the download queue(s) by providing their URI information to pkgAcquire::Item::QueueURI, which calls pkgAcquire::Enqueue.
Once the system is set up, the Run method will spawn subprocesses to handle the enqueued URIs; the scheduler will then take items from the queues and feed them into the handlers until the queues are empty.