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* imap,smtp: add XOAUTH2 supportJulian Pidancet2022-10-013-0/+21
| | | | | | | | | | | | | | | | | | | | | Add XOAUTH2 authentication support for IMAP and SMTP. Although XOAUTH2 is now deprecated in favor of OAuthBearer, it is the only way to connect to Office365 since Basic Auth is now completely removed. Since XOAUTH2 is very similar to OAuthBearer and uses the same configuration parameters, this is basically a copy-paste of the existing OAuthBearer code. However, XOAUTH2 support was removed from go-sasl library, so this change reimports the code that was removed from go-sasl and offers it a new home in lib/xoauth2.go. Hopefully it shouldn't be too hard to maintain, being less than 50 SLOC. Link: https://github.com/emersion/go-sasl/commit/7bfe0ed36a21 Implements: https://todo.sr.ht/~rjarry/aerc/78 Signed-off-by: Julian Pidancet <julian.pidancet@oracle.com> Tested-by: Inwit <inwit@sindominio.net> Acked-by: Tim Culverhouse <tim@timculverhouse.com>
* imap: stop checkmail if there are pending actionskt programs2022-09-291-0/+13
| | | | | | | | | | | | | Pass message containing remaining directories to check. Account widget will recursively call CheckMail with the remaining directories until a Done message is returned. Only needed for IMAP worker as other workers run check-mail-cmd in a separate goroutine. Suggested-By: Tim Culverhouse <tim@timculverhouse.com> Signed-off-by: kt programs <ktprograms@gmail.com> Tested-by: Tim Culverhouse <tim@timculverhouse.com>
* imap: send message info updates for bulk flag opsKoni Marti2022-09-291-41/+59
| | | | | | | | | | Send message info updates back to to ui instead of posting a fetch header action to the worker when performing a bulk flag operation. This prevents the worker channels from filling up which can result in a deadlock. Signed-off-by: Koni Marti <koni.marti@gmail.com> Tested-by: Tim Culverhouse <tim@timculverhouse.com>
* idler: fix data race for access to idleing and waitingTim Culverhouse2022-09-261-3/+15
| | | | | | | Protect access to fields idleing and waiting via a mutex. Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Acked-by: Robin Jarry <robin@jarry.cc>
* backends: send MessageInfoError on header fetching errorTim Culverhouse2022-09-251-4/+1
| | | | | | | | | | | | | | | | | | | | | When an error is encountered fetching a header, the backends respond with a type.Error worker message. On receipt of this message, the UI deletes all pending headers. The headers are all requested again as they remain on the screen, resulting in an infinite request loop - and an infinite logging loop. The user only ever sees the spinner unless they check the logs. A previous commit intended to fix this, however it introduced a regression where any message that was part of the fetch request would also be marked as erroneous. This commit is reverted with commit 2aad2fea7d36 ("msgstore: revert 9fdc7acf5b48"). Send an erroneous message info message from the backend when an error is encountered for a specific UID. Fixes: 01f80721e283 ("msgstore: post MessageInfo on erroneous fetch") Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Acked-by: Robin Jarry <robin@jarry.cc>
* charset: handle unknown charsets more user-friendlyKoni Marti2022-09-251-1/+4
| | | | | | | | | Do not throw an error when the charset is unknown; the message entity can still be read, but log the error instead. Reported-by: falsifian Signed-off-by: Koni Marti <koni.marti@gmail.com> Acked-by: Robin Jarry <robin@jarry.cc>
* cache: fetch flags from UITim Culverhouse2022-09-201-10/+4
| | | | | | | | | | | | | | | When cached headers are fetched, an action is posted back to the Worker to immediately fetch the flags for the message from the server (we can't know the flags state, therefore it's not cached). When scrolling, a lag occurs when loading cached headers because the n+1 message has to wait for the flag request to return before the cached headers are retrieved. Collect the message UIDs in the UI that need flags, and fetch them based off a debounce timer in a single request. Post the action from the UI to eliminate an (ugly) go routine in the worker. Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Acked-by: Robin Jarry <robin@jarry.cc>
* imap: prevent deadlock from posting actions to selfTim Culverhouse2022-09-202-3/+6
| | | | | | | | | | | | | | | | The IMAP worker has a few methods that post a new Action to itself. This can create a deadlock when the worker.Actions channel is full: The worker can't accept a new Action because it's trying to post an action. This is most noticeable when cached headers are enabled and the message list is scrolled fast. Use a goroutine to post actions to the worker when posting from within the worker. Fixes: https://todo.sr.ht/~rjarry/aerc/45 Fixes: 7aa71d334b27 ("imap: add option to cache headers") Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Acked-by: Robin Jarry <robin@jarry.cc>
* imap: implement MoveMessages handlingTim Culverhouse2022-08-222-0/+19
| | | | | | | | | | | | Implement MoveMessages in the imap backend. go-imap includes the MOVE Imap extension by default, and if a server does not support it the command fallsback to a copy-and-delete operation. Servers with the MOVE extension will see a slight performance increase when moving messages due to fewer round trips. The IMAP implementation uses a MessagesMoved worker message to avoid polling the destination mailbox. Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Acked-by: Robin Jarry <robin@jarry.cc>
* imap: create copy of uids to retain sort orderTim Culverhouse2022-08-222-2/+6
| | | | | | | | | | | | | Commit fdfec2c07a8d seqmap: refactor seqmap to use slice instead of map introduced a regression to imap sorting (if supported). The slice passed to seqmap was being sorted in place by UID, thus breaking any sort order sent by the server. Create a copy of the slice to retain the sort order reported to the UI while also keeping a correct map for seqnum -> UID in the worker. Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Acked-by: Robin Jarry <robin@jarry.cc>
* lint: work nicely with wrapped errors (errorlint)Moritz Poldrack2022-08-043-12/+12
| | | | | | | | Error wrapping as introduced in Go 1.13 adds some additional logic to use for comparing errors and adding information to it. Signed-off-by: Moritz Poldrack <moritz@poldrack.dev> Acked-by: Robin Jarry <robin@jarry.cc>
* lint: homogenize operations and minor fixes (gocritic)Moritz Poldrack2022-08-043-11/+14
| | | | | | | | | | | | | | | | | | Apply GoDoc comment policy (comments for humans should have a space after the //; machine-readable comments shouldn't) Use strings.ReplaceAll instead of strings.Replace when appropriate Remove if/else chains by replacing them with switches Use short assignment/increment notation Replace single case switches with if statements Combine else and if when appropriate Signed-off-by: Moritz Poldrack <moritz@poldrack.dev> Acked-by: Robin Jarry <robin@jarry.cc>
* lint: removed unused code (deadcode, structcheck, unused)Moritz Poldrack2022-08-041-1/+0
| | | | | Signed-off-by: Moritz Poldrack <moritz@poldrack.dev> Acked-by: Robin Jarry <robin@jarry.cc>
* lint: ensure errors are at least logged (errcheck)Moritz Poldrack2022-08-041-1/+1
| | | | | Signed-off-by: Moritz Poldrack <moritz@poldrack.dev> Acked-by: Robin Jarry <robin@jarry.cc>
* lint: simplify code (gosimple)Moritz Poldrack2022-08-041-16/+13
| | | | | | | | | | | | | | Replaces infinite for loops containing a select on a channel with a single case with a range over the channel. Removes redundant assignments to blank identifiers. Remove unnecessary guard clause around delete(). Remove `if condition { return true } return false` with return condition Signed-off-by: Moritz Poldrack <moritz@poldrack.dev> Acked-by: Robin Jarry <robin@jarry.cc>
* lint: remove redundant returns (S1023)Moritz Poldrack2022-08-041-1/+0
| | | | | Signed-off-by: Moritz Poldrack <moritz@poldrack.dev> Acked-by: Robin Jarry <robin@jarry.cc>
* lint: remove empty branches (SA9003)Moritz Poldrack2022-08-041-4/+4
| | | | | | | | Empty branches are effectively dead code and should therefore be removed. Signed-off-by: Moritz Poldrack <moritz@poldrack.dev> Acked-by: Robin Jarry <robin@jarry.cc>
* seqmap: refactor seqmap to use slice instead of mapTim Culverhouse2022-08-035-48/+80
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The imap worker's seqmap is represented as a map of sequence number to UID. This presents a problem when expunging group of messages from the mailbox: each individual expunge decrements the sequence numbers by 1 (for every sequence number greater than the expunged). This requires a looping around the map to update the keys. The use of a map also requires that both the sequence number and the UID of a message be known in order to insert it into the map. This is only discovered by fetching individual message body parts (flags, headers, etc), leaving the seqmap to be empty until we have fetched information about each message. In certain instances (if a mailbox has recently been loaded), all information is loaded in memory and no new information is fetched - leaving the seqmap empty and the UI out of sync with the worker. Refactor the seqmap as a slice, so that any expunge automatically decrements the rest of the sequences. Use the results of FetchDirectoryContents or FetchDirectoryThreaded to initialize the seqmap with all discovered UIDs. Sort the UIDs in ascending order: IMAP specification requires that sequence numbers start at 1 increase in order of ascending UID. Add individual messages to the map if they come via a MessageUpdate and have a sequence number larger than our slice. Update seqmap tests with new logic. Reference: https://datatracker.ietf.org/doc/html/rfc3501#section-2.3.1.2 Fixes: https://todo.sr.ht/~rjarry/aerc/69 Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Acked-by: Robin Jarry <robin@jarry.cc>
* seqmap: compare ints instead of uintsTim Culverhouse2022-08-031-2/+2
| | | | | | | | | When a test fails with a uint comparison, assert displays the hex code instead of an int, making it harder to debug. Use ints in sequmap test asserts instead of uints for better readability when tests fail Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Acked-by: Robin Jarry <robin@jarry.cc>
* seqmap: re-order test assertsTim Culverhouse2022-08-031-15/+15
| | | | | | | | Reorder seqmap asserts to properly show display expected and actual when performing go test -v ./... Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Acked-by: Robin Jarry <robin@jarry.cc>
* lint: apply new formatting rulesMoritz Poldrack2022-08-016-17/+17
| | | | | | | Run `make fmt`. Signed-off-by: Moritz Poldrack <git@moritz.sh> Acked-by: Robin Jarry <robin@jarry.cc>
* imap: remove unused expunge codeTim Culverhouse2022-07-261-21/+1
| | | | | | | | | | Remove unused code in the handleDeleteMessages routine. During debugging, it was found that the channel for expunge updates was not working and that all expunge details were coming through as ExpungeUpdates. The reporting channel is unneeded. Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Acked-by: Robin Jarry <robin@jarry.cc>
* sort: show warning when sort is not supportedKoni Marti2022-07-261-0/+2
| | | | | | | | | | Use the capabilities returned by the backend to check whether sort is implemented when the user tries to use the sort command. Print a warning to the log when a sort request is silently dropped by the backend. Suggested-by: |cos| Signed-off-by: Koni Marti <koni.marti@gmail.com> Acked-by: Robin Jarry <robin@jarry.cc>
* seqmap: sync seqNum to uid after expungeTim Culverhouse2022-07-242-5/+20
| | | | | | | | | | | | | | This patch updates the seqNums after an Expunge operation. When an expunge operation occurs, the seqNum of the deleted message is reported. The Imap spec [0] states that an immediate decrement of all seqnums greater than the deleted occurs, even before the next reporting of an expunge update. [0]: https://datatracker.ietf.org/doc/html/rfc3501#section-7.4.1 Fixes: https://todo.sr.ht/~rjarry/aerc/61 Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Signed-off-by: Robin Jarry <robin@jarry.cc>
* logging: use level-based logger functionsRobin Jarry2022-07-2310-53/+56
| | | | | | | | | | | | Do not pass logger objects around anymore. Shuffle some messages to make them consistent with the new logging API. Avoid using %v when a more specific verb exists for the argument types. The loggers are completely disabled (i.e. Sprintf is not even called) by default. They are only enabled when redirecting stdout to a file. Signed-off-by: Robin Jarry <robin@jarry.cc> Acked-by: Moritz Poldrack <moritz@poldrack.dev>
* imap: disable debug loggerRobin Jarry2022-07-231-2/+0
| | | | | | | | | This causes all raw email bodies to be dumped along with actual debugging messages. I don't believe we neither need nor want such a thing. Signed-off-by: Robin Jarry <robin@jarry.cc> Acked-by: Moritz Poldrack <moritz@poldrack.dev>
* imap: fix error when server returns a message without body sectionRobin Jarry2022-07-231-0/+4
| | | | | | | | | | | | | | | | | | | | | | When opening unread emails from certain people (I won't name any names, sorry), an annoying error message is displayed on the status line: could not get section &imap.BodySectionName{BodyPartName: imap.BodyPartName{Specifier:"", Path:[]int(nil), Fields:[]string(nil), NotFields:false}, Peek:false, Partial:[]int(nil), value} This does not occur for already read messages. This issue is similar to the one that was fixed in commit 8ed95b0d2ad2 ("imap: avoid crash when replying to unread message"). This happens because the flags are updated in the callback that receives the message itself. It causes the flag update to arrive in the same channel/request. Ignore the messages that have an empty body (i.e. only containing flag updates). This is inherently racy but there seems no way to get rid of these extra messages. Signed-off-by: Robin Jarry <robin@jarry.cc> Acked-by: Koni Marti <koni.marti@gmail.com>
* threading: enable filtering of server-side threadsTim Culverhouse2022-07-102-9/+19
| | | | | | | | | | | | | | This patch enables the filtering of a threaded view which uses server-built threads. Filtering is done server-side, in order to preserve the use of server-built threads. In adding this feature, the filtering of notmuch folders was brought up to feature parity with the other workers. The filters function the same (ie: they can be stacked). The notmuch filters, however, still use notmuch syntax for the filtering. Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Acked-by: Robin Jarry <robin@jarry.cc>
* threading: add backend capabilities to workersTim Culverhouse2022-07-102-0/+15
| | | | | | | | | | | This patch provides a method to report backend capabilities to the UI. The intial capabilities included in the report are Sort and Thread. Having these available to the UI enables the client to better handle server side threading. Signed-off-by: Koni Marti <koni.marti@gmail.com> Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Acked-by: Robin Jarry <robin@jarry.cc>
* imap: fix data race on seqMap arrayRobin Jarry2022-06-246-28/+146
| | | | | | | | | | | | | | | | | | | | | | | | | | | There are concurrent threads that are accessing and modifying IMAPWorker.seqMap (the mapping of sequence numbers to message UIDs). This can lead to crashes when trying to add and remove a message ID. panic: runtime error: index out of range [391] with length 390 goroutine 1834 [running]: git.sr.ht/~rjarry/aerc/logging.PanicHandler() logging/panic-logger.go:47 +0x6de panic({0xa41760, 0xc0019b3290}) /usr/lib/golang/src/runtime/panic.go:838 +0x207 git.sr.ht/~rjarry/aerc/worker/imap.(*IMAPWorker).handleFetchMessages.func1() worker/imap/fetch.go:214 +0x185 created by git.sr.ht/~rjarry/aerc/worker/imap.(*IMAPWorker).handleFetchMessages worker/imap/fetch.go:209 +0x12b Use a map which makes more sense than a simple array for random access operations. Also, it allows better typing for the key values. Protect the map with a mutex. Add internal API to access the map. Add basic unit tests to ensure that concurrent access works. Fixes: https://todo.sr.ht/~rjarry/aerc/49 Signed-off-by: Robin Jarry <robin@jarry.cc> Acked-by: Moritz Poldrack <moritz@poldrack.dev>
* imap: add option to cache headersTim Culverhouse2022-06-225-12/+243
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add option to cache headers for imap accounts. Cache db is located at $XDG_CACHE_DIR/aerc/{account name}. The cache is cleaned of stale entries when aerc is first opened. Two new account level configuration options are introduced: * cache-headers (Default: false) * cache-max-age (Default: 30 days (720 hours)) The change in worker/imap/open.go is to set the selected directory. This is required to access the UIDVALIDITY field, which is used in combination with the message ID to form the key for use in the cache db. The key structure is: "header.{UIDVALIDITY}.{UID}" Where reasonable, cache does not stop aerc from running. In general, if there is an error in the cache, aerc should continue working as usual. Errors are either displayed to the user or logged. All messages are stored without flags, and when retrieved have the flags set to SEEN. This is to prevent UI flashes. A new method to FetchMessageFlags is introduced to update flags of cached headers. This is done asynchronously, and the user will see their messages appear and then any flags updated. The message will initially show as SEEN, but will update to unread. I considered updating the cache with the last-known flag state, however it seems prudent to spare the R/W cycle and assume that - eventually - all messages will end up read, and if it isn't the update will occur rather quickly. Note that leveldb puts a lock on the database, preventing multiple instances of aerc from accessing the cache at the same time. Much of this work is based on previous efforts by Vladimír Magyar. Implements: https://todo.sr.ht/~rjarry/aerc/2 Thanks: Vladimír Magyar <vladimir@mgyar.me> Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Tested-by: inwit <inwit@sindominio.net> Reviewed-by: Koni Marti <koni.marti@gmail.com> Acked-by: Robin Jarry <robin@jarry.cc>
* dirlist: update RUE counts for imap/maildir on move|copy|delete|archiveTim Culverhouse2022-06-071-0/+5
| | | | | | | | | | | | | | | | | | | When moving/copying/deleting/archiving a message in imap, the RUE counts displayed in the dirlist would not update properly. Maildir has (had) an implementation that recounts the entire directory and updates the DirectoryInfo after one of these actions. This patch implements a more efficient method of updating, and also enables it to apply to IMAP without any additional requests. Upon completion of the action, the counts are manually updated with the count of messages in the action and recent and/or unseen states of those messages. This is more efficient for maildir, because we aren't counting everything in the store. For IMAP, we get the updates for free because we are only performing the update after confirmation from the server that the action has happened. Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Acked-by: Robin Jarry <robin@jarry.cc>
* feat: add background mail polling option for all workersTim Culverhouse2022-05-312-0/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | Check for new mail (recent, unseen, exists counts) with an external command, or for imap with the STATUS command, at start or on reconnection and every X time duration IMAP: The selected folder is skipped, per specification. Additional config options are included for including/excluding folders explicitly. Maildir/Notmuch: An external command will be run in the background to check for new mail. An optional timeout can be used with maildir/notmuch. Default is 10s New account options: check-mail check-mail-cmd (maildir/notmuch only) check-mail-timeout (maildir/notmuch only), default 10s check-mail-include (IMAP only) check-mail-exclude (IMAP only) If unset, or set less than or equal to 0, check-mail will be ignored Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Tested-by: Moritz Poldrack <moritz@poldrack.dev> Acked-by: Robin Jarry <robin@jarry.cc>
* imap: add timeout to tcp connect functionsKoni Marti2022-05-042-120/+188
| | | | | | | | | Extract the tcp connection details and timeout the tcp connect functions (net.ResolveTCPAddr and net.DialTCP). If timed out, ensure that the connection is properly closed. Signed-off-by: Koni Marti <koni.marti@gmail.com> Acked-by: Robin Jarry <robin@jarry.cc>
* imap: add debouncer to the idlerKoni Marti2022-05-043-11/+35
| | | | | | | | | | | | | Add a debouncer to the idle mode. Avoid unnecessary idling when another job arrives within a certain time frame. For example, the ui sends three messages to the worker at the same time when we open a message (FlagMessage, FetchMessageBodyPart, and the FetchMessageHeaders). The debouncer prevents the unnecessary entering and leaving of the idle mode between those messages. Signed-off-by: Koni Marti <koni.marti@gmail.com> Acked-by: Robin Jarry <robin@jarry.cc>
* imap: monitor the logout channel with an observerKoni Marti2022-05-043-86/+186
| | | | | | | | | Untangle the observer functionality from the message handling routine. Observe the imap client's logout channel and trigger a connection error when necessary to start the reconnect cycle. Signed-off-by: Koni Marti <koni.marti@gmail.com> Acked-by: Robin Jarry <robin@jarry.cc>
* imap: manage idle mode with an idlerKoni Marti2022-05-043-24/+181
| | | | | | | | | Untangle the idle functionality from the message handling routine. Wait for the idle mode to properly exit every time to ensure a consistent imap state. Timeout when hanging in idle mode and inform the ui. Signed-off-by: Koni Marti <koni.marti@gmail.com> Acked-by: Robin Jarry <robin@jarry.cc>
* imap: extract imap config and configure handlingKoni Marti2022-05-042-97/+123
| | | | | | | | Extract the imap config and move the configure part out of the message handler. Signed-off-by: Koni Marti <koni.marti@gmail.com> Acked-by: Robin Jarry <robin@jarry.cc>
* imap: fix out-of-range panic for imap updatesKoni Marti2022-04-291-0/+14
| | | | | | | | | | Check slice bounds before using it for the message and expunge updates. Log the error but ignore the affected updates. Link: https://lists.sr.ht/~rjarry/aerc-devel/%3CCJEHBFFUI11T.1AYGOMVGZ87ZS%40rek2system%3E Reported-by: ReK2 <rek2@hispagatos.org> Signed-off-by: Koni Marti <koni.marti@gmail.com> Acked-by: Robin Jarry <robin@jarry.cc>
* imap: avoid crash when replying to unread messageRobin Jarry2022-04-281-2/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When running `:reply -q` on an unread message, aerc crashes after opening the editor: panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x18 pc=0x5d1019] goroutine 63 [running]: bufio.(*Reader).fill(0xc000086ef8) /usr/lib/golang/src/bufio/bufio.go:106 +0xd9 bufio.(*Reader).Peek(0xc00020bef8, 0x1) /usr/lib/golang/src/bufio/bufio.go:144 +0x5d github.com/emersion/go-message/textproto.ReadHeader(0xc00004a700?) emersion/go-message@v0.15.0/textproto/header.go:525 +0x5f git.sr.ht/~rjarry/aerc/worker/imap.(*IMAPWorker).handleFetchMessageBodyPart.func1(0xc00056e280) worker/imap/fetch.go:99 +0x1ab git.sr.ht/~rjarry/aerc/worker/imap.(*IMAPWorker).handleFetchMessages.func1() worker/imap/fetch.go:178 +0xd7 created by git.sr.ht/~rjarry/aerc/worker/imap.(*IMAPWorker).handleFetchMessages worker/imap/fetch.go:172 +0x12b This happens because the flags are updated in the callback that receives the message itself. It causes the flag update to arrive in the same channel/request. Ignore the messages that have an empty body (i.e. only containing flag updates). This is inherently racy but there seems no way to get rid of these extra messages. Signed-off-by: Robin Jarry <robin@jarry.cc> Tested-by: Connor Kuehl <cipkuehl@gmail.com>
* logging: added a log on panicMoritz Poldrack2022-03-234-0/+12
| | | | | | | | | | | | | Since panics still regularly "destroy" the terminal, it is hard to get a stack trace for panics you do not anticipate. This commit adds a panic handler that automatically creates a logfile inside the current working directory. It has to be added to every goroutine that is started and will repair the terminal on a panic. Signed-off-by: Moritz Poldrack <git@moritz.sh> Acked-by: Robin Jarry <robin@jarry.cc>
* go vet: composite literal uses unkeyed fieldsMoritz Poldrack2022-03-188-19/+19
| | | | | | | | This commit fixes all occurrences of the abovementioned lint-error in the codebase. Signed-off-by: Moritz Poldrack <git@moritz.sh> Acked-by: Robin Jarry <robin@jarry.cc>
* imap: start reconnect when initial connect failsKoni Marti2022-02-201-3/+11
| | | | | | | Start the reconnect cycle when the initial connect fails. Make the connection observer send a connection error when the imap client is nil. Signed-off-by: Koni Marti <koni.marti@gmail.com>
* imap: reconnect with exponential backoffKoni Marti2022-02-191-4/+28
| | | | | | | | | | | | | waits an increasing amount of time before attempting a reconnect. Wait is capped at 16s. Prevents many reconnect attemps in a short time period. Fixes commit 05ad96a30cb8 ("imap: improve reconnect stability") that improved the reliability of the reconnect mechanism but did not implement controls to prevent the triggering of too many reconnects within a short period of time. Fixes: 05ad96a30cb8 ("imap: improve reconnect stability") Signed-off-by: Koni Marti <koni.marti@gmail.com>
* imap: improve reconnect stabilityKoni Marti2022-02-061-7/+19
| | | | | | | | | | | | | | | | improves the robustness of the imap reconnect feature which was introduced in commit beae17a6da37 ("imap: auto-reconnects on connection error"). If a connection error is emitted, the message list is cleared and a corresponding error message is shown in the ui. Status bar is updated as well. Upon reconnect, the directories and the message list will be re-fetched (same behavior as the connect command). Reconnect can be enabled and disabled with the connect and the disconnect commands. Signed-off-by: Koni Marti <koni.marti@gmail.com>
* imap: do not abort on malformed messagesRobin Jarry2022-02-061-1/+7
| | | | | | | | | | | | | | Some messages contain invalid headers, textproto.ReadHeader fails with an error: malformed MIME header key: From nobody Fri Jan 14 19 And all other messages of the selected folder are ignored. Return an explicit error message to the UI and continue processing other messages. This is consistent with what the maildir worker does. Signed-off-by: Robin Jarry <robin@jarry.cc>
* imap: auto-reconnects on connection errorKoni Marti2022-01-191-2/+24
| | | | | | | | | if the worker emits a connection error, the ui will automatically send back a reconnect command. The worker then establishes a new connection. Auto-reconnect is disabled when the user sends the disconnect command. Fixes: https://todo.sr.ht/~rjarry/aerc/1 Signed-off-by: Koni Marti <koni.marti@gmail.com>
* imap: emits connection error on logoutKoni Marti2022-01-191-0/+29
| | | | | | | | implements a new connection error message. This allows the worker to emit a connection-related error message to the ui when the imap client closes the loggedOut channel. Signed-off-by: Koni Marti <koni.marti@gmail.com>
* imap: fix panic when sending multiple connect cmdsKoni Marti2022-01-191-15/+26
| | | | | | | | | | | fixes the panic when the user sends multiple connect commands and is already connected. The panic is caused by closing an already closed channel. This happens when the idle re-init code is not executed, e.g. when there's a return statement in the switch block. A defer func() before the switch block will prevent this. The existing behavior of only creating a new idleStop channel when properly connected is preseverd. Signed-off-by: Koni Marti <koni.marti@gmail.com>
* Revert "imap: attempt automatic reconnection on error"Robin Jarry2022-01-151-41/+3
| | | | | | | | | This reverts commit c605ada3ddc7569ebfc153b07db12a21b30d0569. This breaks reading message bodies. I am not sure why, I'll take some time to fix it later. Signed-off-by: Robin Jarry <robin@jarry.cc>
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