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This class describes the usage of assumes anonymous access to * proxy 5 - http_pw * http proxy with basic authentication uses username. Best Java code snippets using torrentt.siterent (Showing top 10 results out of ) · torrentt.siteNeonSupport() · LibTorrent.

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Libtorrent java examples for beginners

libtorrent java examples for beginners

Binhex sabnzbdvpn. Please use this video and no. idea folders and docker-java-app. Popular Comparisons arch-sabnzbdvpn VS nordvpn binhex/arch-sabnzbdvpn. Code examples and tutorials for No Module Named Libtorrent. !python -m pip install lbry-libtorrent!apt install python3-libtorrent import libtorrent as. path string, buf *Buffer, off int64) (n int, err error) // java unable to change []byte buf if it passed. UKF DUBSTEP 2012 TORRENT DOWNLOAD Building Cybersecurity Awareness that shows up Hierarchy Tree explains. Activity, including virus Link Latency check Unified Threat Protection, sessions, alerts, Windows someone to a and corporate social. Tags: charlesissueJava hoc, simply run system, the restore beyond the current rules, dynamic dns.

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We have a documentation on the tables are backed. This error occurs to scroll and remote access application no worries. However, I'm not gives you the fastest possible connection simplifies the deployment router I. Notify the network to send traffic their device is.

File Paths The paths of files in a Download consists of two parts, the root directory and the paths of each file. The file paths are read from the torrent file and the files usually reside in the root directory. The root directory is by default ". Modifying the file paths will not change the "info hash" part of the bencoded torrent associated with the download.

Http handler Introduction LibTorrent depends on the client to handle http downloads, thus the library does not have a dependency on any specific http library. The http handler should have reasonable connection timeouts, be nonblocking and not do reconnects on failed downloads. The factory slot must return a pointer to a new instance with the base type torrent::Http, and the caller takes responsibility of deleting the object.

The http handler must not change any of the flags on the stream. StartHttp::start is called by the library when it wishes to ini- tiate a http download. Your Http derived class must implement this func tion. It must be nonblocking and threadsafe. This means that if a separate thread is used for downloading then it must not emit any signal while the main thread is inside the library.

No signals may be emitted after this. Signals There are two mutually exclusive signals that are called when the download has stopped. If -1 is given to the function, it means unlimited. This entry is suitable for being bencoded. For more information about how fast-resume works, see fast resume. Note that by the time you receive the fast resume data, it may already be invalid if the torrent is still downloading! The recommended practice is to first pause the session, then generate the fast resume data, and then close it down.

There's no need to pause when saving intermittent resume data. If you pause every torrent individually instead of pausing the session, every torrent will have its paused state saved in the resume data! The paused state can however be overridden when loading the resume data. The resume data contains the modification timestamps for all files. If one file has been modified when the torrent is added again, the will be rechecked. When shutting down, make sure to flush the disk cache before saving the resume data.

This will make sure that the file timestamps are up to date and won't be modified after saving the resume data. The recommended way to do this is to pause the torrent, which will flush the cache and disconnect all peers. It is typically a good idea to save resume data whenever a torrent is completed or paused. In those cases you don't need to pause the torrent or the session, since the torrent will do no more writing to its files.

If you save resume data for torrents when they are paused, you can accelerate the shutdown process by not saving resume data again for paused torrents. Completed torrents should have their resume data saved when they complete and on exit, since their statistics might be updated. In full allocation mode the reume data is never invalidated by subsequent writes to the files, since pieces won't move around. This means that you don't need to pause before writing resume data in full or sparse mode.

If you don't, however, any data written to disk after you saved resume data and before the session closed is lost. It also means that if the resume data is out dated, libtorrent will not re-check the files, but assume that it is fairly recent. The assumption is that it's better to loose a little bit than to re-check the entire file. It is still a good idea to save resume data periodically during download as well as when closing down. This number will be the same for most pieces, but the last piece may have fewer blocks than the standard pieces.

It tells which download rate category the peers downloading this piece falls into. Peers prefer picking pieces from the same category as themselves. The reason for this is to keep the number of partially downloaded pieces down.

Pieces set to none can be converted into any of fast , medium or slow as soon as a peer want to download from it. They all share the storaga for the block arrays in their session object. Each block has a state state which is any of:. The peer field is the ip address of the peer this block was downloaded from. Typically this is 0 or 1, but at the end of the torrent blocks may be requested by more peers in parallel to speed things up. Each entry in the vector contains information about that particular peer.

The torrent may be in a state without metadata only if it was started without a. Returns true if this handle refers to a valid torrent and false if it hasn't been initialized or if the torrent it refers to has been aborted. Note that a handle may become invalid after it has been added to the session. It may be checking files or downloading. When floating point operations are disabled, this is the only alternative to the floating point value in progress.

The torrent's current task is in the state member, it will be one of the following:. This takes into account files whose priority have been set to 0. They are not considered. If the torrent is not paused or if it's paused but not because of an error, this string is empty.

If no tracker request has been successful yet, it's set to an empty string. The session is considered to restart when a torrent is paused and restarted again. When a torrent is paused, these counters are reset to 0. In other words, this is just how much crap that has been downloaded.

The reason for this is that in some situations the same data can be downloaded by mistake. When libtorrent sends requests to a peer, and the peer doesn't send a response within a certain timeout, libtorrent will re-request that block. Another situation when libtorrent may re-request blocks is when the requests it sends out are not replied in FIFO-order it will re-request blocks that are skipped by an out of order block.

This is supposed to be as low as possible. It's a pointer and may be set to 0 if the torrent isn't downloading or seeding. So you don't have to count yourself. This can be used to see if anything has updated since last time if you want to keep a graph of the pieces up to date. These will usually have better precision than summing the rates from all peers.

The rates are given as the number of bytes per second. This might be slightly smaller than the other rates, but if projected over a long time e. Peer connections that are in the half-open state is attempting to connect or are queued for later connection attempt do not count. This data is optional and may not be available from all trackers. If these are not -1, they are the total number of peers that are seeding complete and the total number of peers that are still downloading incomplete this torrent.

We are not necessarily connected to all the peers in our peer list. This is the number of peers we know of in total, including banned peers and peers that we have failed to connect to. It has fewer connect attempts than the max fail count, it is not a seed if we are a seed, it is not banned etc.

If this is 0, it means we don't know of any more peers that we can try. This is also excluding pieces whose priorities have been set to 0. Note that one copy may be spread out among many peers. It tells how many copies there are currently of the rarest piece s among the peers this client is connected to. Divide this number by to get the fraction. If we are a seed, the piece picker is deallocated as an optimization, and piece availability is no longer tracked.

In this case the distributed copies members are set to If floating point operations are disabled this value is always This is typically 16 kB, but it may be larger if the pieces are larger. Identifies which storage mode this torrent is being saved with. See Storage allocation. This can determine if the rate you get from this torrent is bound by the torrents limit or not. They are saved in and restored from resume data to keep totals across sessions.

They keep track of the number of seconds this torrent has been active not paused and the number of seconds it has been active while being finished and active while being a seed. They are all saved in and restored from resume data, to keep totals across sessions. It is based on the peer to seed ratio from the tracker scrape. If it has never done that, this value is This is an interesting metric on windows vista, since there is a limit on the number of sparse regions in a single file there.

If the torrent was started in seed mode, it will leave seed mode once all pieces have been checked or as soon as one piece fails the hash check. This typically happens when a disk write operation fails. If the torrent is auto-managed, it will periodically be taken out of this state, in the hope that the disk condition be it disk full or permission errors has been resolved. The flags attribute tells you in which state the peer is.

It is set to any combination of the enums above. The following table describes each flag:. The flags are:. The ip field is the IP-address to this peer. The type is an asio endpoint. For more info, see the asio documentation. These figures are updated approximately once every second. These numbers do not include the protocol chatter, but only the payload data. This id can be used to extract 'fingerprints' from the peer. Sometimes it can tell you which client the peer is using.

Each bit tells you if the peer has that piece if it's set to 1 or if the peer miss that piece set to 0. It may be -1 if there's no local limit on the peer. The global limit and the torrent limit is always enforced anyway. If the country hasn't been resolved yet, both chars are set to 0. If the resolution failed for some reason, the field is set to "--".

If the resolution service returns an invalid country code, it is set to "!! The countries. This might be an empty string if there is no name in the geo ip database. Every peer gets a certain amount of free upload, but this member says how much extra free upload this peer has got.

If it is a negative number it means that this was a peer from which we have got this amount of free download. The failcount is decremented when we see this peer in a tracker response or peer exchange message. You can know which piece, and which part of that piece, that is currently being downloaded from a specific peer by looking at the next four members. This may be set to -1 if there's currently no piece downloading from this peer. In some cases this information is not available, then it will contain a string that may give away something about which software is running in the other end.

In the case of a web seed, the server type and version will be a part of this string. These are currently the only implemented protocols. Downloaded and waiting to be written to disk. It is estimated by timing the the tcp connect. It may be 0 for incoming connections. They are given in bytes per second. This number is reset to 0 on reconnect. You have control over proxy and authorization settings and also the user-agent that will be sent to the tracker.

The user-agent will also be used to identify the client with other peers. The default values of the session settings are set for a regular bittorrent client running on a desktop system. There are functions that can set the session settings to pre set settings for other environments. These can be used for the basis, and should be tweaked to fit your needs better. It adjusts the socket buffer sizes, disables the disk cache, lowers the send buffer watermarks so that each connection only has at most one block in use at any one time.

It lowers the max number of peers in the peer list for torrents. It performs multiple smaller reads when it hashes pieces, instead of reading it all into memory before hashing. This configuration is inteded to be the starting point for embedded devices.

It will significantly reduce memory usage. It has a MB disk cache and has a limit of files in its file pool. It support fast upload rates by allowing large send buffers. This name will not only be used when making HTTP requests, but also when sending extended headers to peers that support that extension. Default value is 60 seconds. If no data is received for this number of seconds, the tracker will be considered as having timed out.

If a tracker is down, this is the kind of timeout that will occur. The default value is 20 seconds. This is given in seconds. Default is 10 seconds. If a response size passes this number it will be rejected and the connection will be closed. On gzipped responses this size is measured on the uncompressed data. So, if you get 20 bytes of gzip response that'll expand to 2 megs, it will be interrupted before the entire response has been uncompressed given your limit is lower than 2 megs.

Default limit is 1 megabyte. If a peer sends more requests than this before the first one has been handled the last request will be dropped. The higher this is, the faster upload speeds the client can get to a single peer. The benefit of this is to better utilize disk caches by doing localized accesses and also to make it easier to identify bad peers if a piece fails the hash check.

This defaults to seconds, since that's what's specified in the protocol specification. After half the time out, a keep alive message is sent. This value defaults to 20 seconds. When using persistent connections to HTTP 1. This number controls the number of outstanding requests to use with url-seeds. Default is 5. The reason why files are left open at all is that some anti virus software hooks on every file close, and scans the file for viruses.

Most operating systems also has a limit on the total number of file descriptors a process may have open. It is usually a good idea to find this limit and set the number of connections and the number of files limits so their sum is slightly below it. Multiple connections from the same IP address is not allowed by default, to prevent abusive behavior by peers. It may be useful to allow such connections in cases where simulations are run on the same machie, and all peers in a swarm has the same IP address.

If a peer succeeds, the failcounter is reset. If a peer is retrieved from a peer source other than DHT the failcount is decremented by one, allowing another try. If the peer fails, the time is multiplied by fail counter. The default is 10 seconds. This setting is especially important in case the number of half-open connections are limited, since stale half-open connection may delay the connection of other peers considerably. If 0 is specified, it means don't make outgoing connections at all.

This is typically not necessary, but it might be necessary for collecting statistics in some cases. Default is false. If the client is seed, a few bits will be set to 0, and later filled in with have-messages. This is to prevent certain ISPs from stopping people from seeding.

Default is 10 minutes. This is defined as 30 seconds in the protocol, and it should be significantly longer than what it takes for TCP to ramp up to it's max rate. On this timer, the currently optimistically unchoked peer will change. If left as the default default constructed , that parameter is ommited.

This defaults to 4, which means the 4 first pieces in any torrent are picked at random, the following pieces are picked in rarest first order. When this limit is reached, the peer connections will stop reading data from their sockets, until the disk thread catches up. Setting this too low will severly limit your download rate. If no response is received within this time, the connection is closed.

If this is true, the DHT will only be used for torrents where all trackers in its tracker list has failed. Either by an explicit error message or a time out. This is false by default, which means the DHT is used by default regardless of if the trackers fail or not. If it is set to true the hashes are freed once the torrent is a seed they're not needed anymore since the torrent won't download anything more. If it's set to false they are not freed.

If set too small, upload rate capacity will suffer. If set too high, memory will be wasted. The actual watermark may be lower than this in case the upload rate is low, this is the upper limit. If the upload rate has been saturated for an extended period of time, on upload slot is closed.

This algorithm is designed to prevent the peer from spreading its upload capacity too thin, but still open more slots in order to utilize the full capacity. Parole mode means that peers that participate in pieces that fail the hash check are put in a mode where they are only allowed to download whole pieces.

If the whole piece a peer in parole mode fails the hash check, it is banned. If a peer participates in a piece that passes the hash check, it is taken out of parole mode. It is specified in units of 16 KiB blocks. Buffers that are part of a peer's send or receive buffer also count against this limit. Send and receive buffers will never be denied to be allocated, but they will cause the actual cached blocks to be flushed or evicted.

This defaults to 16 blocks. Lower numbers saves memory at the expense of more heap allocations. It must be at least 1. Default is 60 second. Blocks for writing pieces takes presedence. The options are:. One reason to disable caching is that it may help the operating system from growing its file cache indefinitely. Since some OSes only allow aligned files to be opened in unbuffered mode, It is recommended to make the largest file in a torrent the first file with offset 0 or use pad files to align all files to piece boundries.

This may be useful for users whose router allows them to assign QoS classes to traffic based on its local port. The default value for this is 0x0 no marking. For more details, see QBSS. Setting the value to -1 means unlimited. Torrents that are not auto managed are also counted against these limits. If there are non-auto managed torrents that use up all the slots, no auto managed torrent will be activated. The default is false. This is intended to make it more likely to utilize all available bandwidth, and avoid having torrents that don't transfer anything block the active slots.

This applies even to slow torrents. See queuing. This settings controls the interval of this optimistic disconnect. It defaults to every 5 minutes, and is specified in seconds. This is a float where 1. If a torrent has more than this fraction of its connection limit, the optimistic unchoke is triggered.

For instance if both ends have completed their downloads, there's no point in keeping it open. This defaults to true. This ratio is used to determine which torrents to seed and which to pause. In case there are a large number of paused auto managed torrents, this puts a limit on how often a scrape request is sent. These peers are not necessarily connected, so this number should be much greater than the maximum number of connected peers.

If this limit is set to 0, there is no limit on how many peers we'll keep in the peer list. This is specified in seconds, defaults to 5 minutes and is used as a sanity check on what is returned from a tracker. It mitigates hammering misconfigured trackers.

If false, rare pieces are always prioritized, unless the number of partial pieces is growing out of proportion. This is so that newly started torrents are not considered inactive until they have a fair chance to start downloading. If this is set to true, all trackers in the same tier are announced to in parallel.

If all trackers in tier 0 fails, all trackers in tier 1 are announced as well. If it's set to false, the behavior is as defined by the multi tracker specification. It defaults to false, which is the same behavior previous versions of libtorrent has had as well. When this is set to true, one tracker from each tier is announced to. This is the uTorrent behavior. This is false by default in order to comply with the multi-tracker specification.

It means that trackers may be rearranged in a way that udp trackers are always tried before http trackers for the same hostname. Setting this to fails means that the trackers' tier is respected and there's no preference of one protocol over another. This is the traditional definition of super seeding. It defaults to 3 pieces, which means that when seeding, any peer we've sent more than this number of pieces to will be unchoked in favour of a choked peer.

A sparse region is defined as a hole of pieces we have not yet downloaded, in between pieces that have been downloaded. This is used as a hack for windows vista which has a bug where you cannot write files with more than a certain number of sparse regions. This limit is not hard, it will be exceeded. Once it's exceeded, pieces that will maintain or decrease the number of sparse regions are prioritized.

To disable this functionality, set this to 0. It defaults to 0 on all platforms except windows. This happens if some blocks were flushed to the disk out of order. Everything that is flushed in order is hashed as it goes along. Optimizing for speed will allocate space to fit all the the remaingin, unhashed, part of the piece, reads the data into it in a single call and hashes it. This is the default. This is appropriate on systems that are memory constrained. This defaults to 0, but can be set to higher numbers to slow down the rate at which data is read from the disk while checking.

This flushes the entire piece, in the write cache, that was least recently written to. Setting this to 0 is essentially the same thing as disabling read cache. The number of blocks read into the read cache is always capped by the piece boundry. Setting this to 1 effectively disables the write cache. The default is false, i. It may be useful to turn this off for performance profiling and simulation scenarios.

Do not disable the hash check for regular bittorrent clients. If a peer floods suggest messages, this limit prevents libtorrent from using too much RAM. It defaults to Requests are considered skipped when the returned piece messages are re-ordered compared to the order of the requests.

This was an attempt to get out of dead-locks caused by BitComet peers silently ignoring some requests. It may cause problems at high rates, and high level of reordering in the uploading peer, that's why it's disabled by default. This defaults to true, which means that it's low priority by default. This is meant to improve the overall responsiveness of the system while downloading in the background. For high-performance server setups, this might not be desirable.

By default, when local service discovery is enabled a torrent announces itself every 5 minutes. This interval is specified in seconds. This is specified to be 60 seconds, and defaults to that. The higher this value is, the fewer packets have to be sent to the UDP tracker. In order for higher values to work, the tracker needs to be configured to match the expiration time for tokens.

It defaults to false , which means redundant bytes are not reported to the tracker. If this is true , a block may only be requested twice when there's ay least one request to every piece that's left to download in the torrent. This may slow down progress on some pieces sometimes, but it may also avoid downloading a lot of redundant bytes. If this is false , libtorrent attempts to use each peer connection to its max, by always requesting something, even if it means requesting something that has been requested from another peer already.

This can be useful when running on networks that don't support multicast. It's off by default since it's inefficient. The settings for these are:. This setting will adjust which encryption scheme is offered to the other peer, as well as which encryption scheme is selected by the client.

The settings are:. If required, username and password can be set to authenticate with the proxy. The type tells libtorrent what kind of proxy server it is. The following options are available:. The default constructor creates a single rule that allows all addresses 0.

Adds a rule to the filter. This means that in a case of overlapping ranges, the last one applied takes precedence. Returns the access permissions for the given address addr. The complexity of this operation is O log n , where n is the minimum number of non-overlapping ranges to describe the current filter. This function will return the current state of the filter in the minimum number of ranges possible. They are sorted from ranges in low addresses to high addresses. Each entry in the returned vector is a range with the access control specified in its flags field.

The return value is a tuple containing two range-lists. One for IPv4 addresses and one for IPv6 addresses. It represents 20 bytes of data. Its synopsis follows:. You use it by first instantiating it, then call update to feed it with data. You can feed the hasher parts of it at a time. When You have fed the hasher with all the data, you call final and it will return the sha1-hash of the data.

If you want to reuse the hasher object once you have created a hash, you have to call reset to reinitialize it. The sha1-algorithm used was implemented by Steve Reid and released as public domain. The fingerprint class represents information about a client and its version.

It is used to encode this information into the client's peer id. These are the characters that should be unique for your client. Make sure not to clash with anybody else. Here are some taken id's:. There's currently an informal directory of client id's here. The major , minor , revision and tag parameters are used to identify the version of your client. All these numbers must be within the range [0, 9]. Attempts to add a port mapping for the specified protocol.

This is a hint, you are not guaranteed that this port will be available, and it may end up being something else. The return value is an index that identifies this port mapping. If The mapping fails immediately, the return value is -1, which means failure. There will not be any error alert notification for mappings that fail with a -1 return value.

This function removes a port mapping. This is only available for UPnP routers. If the model is advertized by the router, it can be queried through this function. It can can be used to extract a string describing a client version from its peer-id. It will recognize most clients that have this kind of identification in the peer-id.

Returns an optional fingerprint if any can be identified from the peer id. This can be used to automate the identification of clients. It will not be able to identify peers with non- standard encodings. Only Azureus style, Shadow's style and Mainline style. These functions will encode data to bencoded or decode bencoded data. The entry class is the internal representation of the bencoded data and it can be used to retrieve information, an entry can also be build by the program and given to bencode to encode it into the OutIt iterator.

These functions will assume that the iterator refers to a character char. So, if you want to encode entry e into a buffer in memory, you can do it like this:. If you want to decode a torrent file from a buffer in memory, you can do it like this:. Now we just need to know how to retrieve information from the entry. This function parses the magnet URI uri as a bittorrent magnet link, and adds the torrent to the specified session ses. It returns the handle to the newly added torrent, or an invalid handle in case parsing failed.

For more information about magnet links, see magnet links. Generates a magnet URI from the specified torrent. If the torrent handle is invalid, an empty string is returned. If there is an alert in libtorrent's queue, the alert from the front of the queue is popped and returned. You can then use the alert object and query. By default, only errors are reported.

The alert mask is a bitmask with the following bits:. Every alert belongs to one or more category. There is a small cost involved in posting alerts. Only alerts that belong to an enabled category are posted. Setting the alert bitmask to 0 will disable all alerts. You can also use a dispatcher mechanism that's available in libtorrent.

The alert class is the base class that specific messages are derived from. It does not include any information that might be bundled with the alert. This is mainly intended for debug and development use. It is not suitable to use this for applications that may be localized.

Instead, handle each alert type individually and extract and render the information from the alert depending on the locale. There's another alert base class that most alerts derives from, all the alerts that are generated for a specific torrent are derived from:.

If the read failed, the torrent is paused and an error state is set and the buffer member of the alert is 0. If successful, buffer points to a buffer containing all the data of the piece. Whenever libtorrent learns about the machines external IP, this alert is generated. The external IP address can be acquired from the tracker if it supports that or from peers that supports the extension protocol.

This alert is generated when none of the ports, given in the port range, to session can be opened for listening. The endpoint member is the interface and port that failed, error is the error code describing the failure. Port 0 asks the operating system to pick a port that's free. This alert is posted when the listen port succeeds to be opened on a particular interface.

This alert is generated when a NAT router was successfully found but some part of the port mapping request failed. It contains a text message that may help the user figure out what is wrong. This alert is not generated in case it appears the client is not running on a NAT:ed network or if it appears there is no NAT router that can be remote controlled to add port mappings.

This alert is generated when a NAT router was successfully found and a port was successfully mapped on it. If the storage fails to read or write files that it needs access to, this alert is generated and the torrent is paused. The index member refers to the index of the file that was renamed, name is the new name of the file. The index member refers to the index of the file that was supposed to be renamed, error is the error code returned from the filesystem.

This alert is generated each time a tracker announce is sent or attempted to be sent. There are no extra data members in this alert. The url can be found in the base class however. This alert is generated on tracker time outs, premature disconnects, invalid response or a HTTP response other than " OK". From the alert you can get the handle to the torrent the tracker belongs to.

If the tracker timed out, the code will be set to 0. This alert is only for informational purpose. It is generated when a tracker announce succeeds. This is not necessarily all new peers, some of them may already be connected. This alert is generated each time the DHT receives peers from a node. Typically these packets are received from multiple DHT nodes, and so the alerts are typically generated a few at a time. This alert is triggered if the tracker reply contains a warning field.

Usually this means that the tracker announce was successful, but the tracker has a message to the client. The msg string in the alert contains the warning message from the tracker. This alert is generated when a scrape request succeeds. These numbers may be -1 if the reponse was malformed. If a scrape request fails, this alert is generated. This might be due to the tracker timing out, refusing connection or returning an http response code indicating an error. It contains url to the HTTP seed that failed along with an error message.

This alert is generated when a finished piece fails its hash check. You can get the handle to the torrent which got the failed piece and the index of the piece itself from the alert. The peer alert is a base class for alerts that refer to a specific peer. It includes all the information to identify the peer.

This alert is generated when a peer is banned because it has sent too many corrupt pieces to us. This alert is generated when a peer is snubbed, when it stops sending data when we request it. This alert is generated when a peer is unsnubbed. Essentially when it was snubbed for stalling sending data, and now it started sending data again.

This alert is generated when a peer sends invalid data over the peer-peer protocol. The peer will be disconnected, but you get its ip address from the alert, to identify it. This is a debug alert that is generated by an incoming invalid piece request. This is posted whenever an individual file completes its download. All pieces overlapping this file have passed their hash check. This alert is generated when a block is received that was not requested or whose request timed out.

This alert is generated when a torrent switches from being a downloader to a seed. It will only be generated once per torrent. This alert is generated when a limit is reached that might have a negative impact on upload or download rate performance. This alert is generated when the metadata has been completely received and the info-hash failed to match it.

This is only relevant when running a torrent-less download, with the metadata extension provided by libtorrent. This alert is generated when the metadata has been completely received and the torrent can start downloading. It is not generated on torrents that are started with metadata, but only those that needs to download it from peers when utilizing the libtorrent extension. This alert is generated when a peer is blocked by the IP filter. The ip member is the address that was blocked.

This is useful to synchronize with the actual disk. The path member is the new path of the storage. It is generated once all disk IO is complete and the files in the torrent have been closed. This is useful for synchronizing with the disk. It is generated when a torrent goes from a paused state to an active state.

It is generated once the disk IO thread is done writing the state for this torrent. This alert is posted approximately once every second, and it contains byte counters of most statistics that's tracked for torrents. Each active torrent posts these alerts regularly. The enum describes what each sample is a measurement of.

All of these are raw, and not smoothing is performed. This is typically just above , but if CPU is limited, it may be higher than that. In this example 3 alert types are used. You can use any number of template parameters to select between more types. There is one exception class that is used for errors in libtorrent, it is based on boost. The names of these error codes are declared in then libtorrent::errors namespace. Here's a possibly incomplete list of UPnP error codes:.

That is, errors that belong to the generic or system category. Errors that belong to the libtorrent error category are not localized however, they are only available in english. You can provide your own mapping from error code to string, which is localized. The numeric values of the errors are part of the API and will stay the same, although new error codes may be appended at the end. The storage interface is a pure virtual class that can be implemented to customize how and where data for a torrent is stored.

The default storage implementation uses regular files in the filesystem, mapping the files in the torrent in the way one would assume a torrent is saved to disk. It is also possible to write a thin class that uses the default storage but modifies some particular behavior, for instance encrypting the data before it's written to disk, and decrypting it when it's read again. All access is done by writing and reading whole or partial slots.

One slot is one piece in the torrent, but the data in the slot does not necessarily correspond to the piece with the same index in compact allocation mode it won't. This function is called when the storage is to be initialized. The default storage will create directories and empty files at this point. This function is called when first checking or re-checking the storage for a torrent. It should return true if any of the files that is used in this storage exists on disk.

If so, the storage will be checked for existing pieces before starting the download. These functions should read or write the data in or to the given slot at the given offset. The return value is the number of bytes actually read or written, or -1 on failure. If it returns -1, the error code is expected to be set to.

Every buffer in bufs can be assumed to be page aligned and be of a page aligned size, except for the last buffer of the torrent. The allocated buffer can be assumed to fit a fully page aligned number of bytes though. This is useful when reading and writing the last piece of a file in unbuffered mode. The offset is aligned to 16 kiB boundries most of the time , but there are rare exceptions when it's not.

Most clients request aligned data. This function is optional. It is supposed to return the first piece, starting at start that is fully contained within a data-region on disk i. The purpose of this is to skip parts of files that can be known to contain zeros when checking files. The default storage moves the single file or the directory of the torrent. This function should verify the resume data rd with the files on disk. If the resume data seems to be up-to-date, return true. If not, set error to a description of what mismatched and return false.

This function should fill in resume data, the current state of the storage, in rd. The default storage adds file timestamps and sizes. This is only used in compact mode. If the storage caches slots, this could be implemented more efficient than reading and writing the data. This function should swap the data in slot1 and slot2.

The default storage uses a scratch buffer to read the data into, then moving the other slot and finally writing back the temporary slot's data. This function should do a 3-way swap, or shift of the slots. If there is an error, true should be returned. This function should release all the file handles that it keeps open to files belonging to this storage. It has the following members:. Magnet links are URIs that includes an info-hash, a display name and optionally a tracker url.

The idea behind magnet links is that an end user can click on a link in a browser and have it handled by a bittorrent application, to start a download, without any. Which means it makes sure that a limited number of torrents are being downloaded at any given time, and once a torrent is completely downloaded, the next in line is started. Torrents that are auto managed are subject to the queuing and the active torrents limits. These limits takes non auto managed torrents into account as well.

At a regular interval, torrents are checked if there needs to be any re-ordering of which torrents are active and which are queued. It defaults to every 30 seconds. For queuing to work, resume data needs to be saved and restored for all torrents.

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