syncthing/lib/connections/debug.go

// Copyright (C) 2014 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.

package connections

import (
	"github.com/syncthing/syncthing/lib/logger"
)

var (
	l = logger.DefaultLogger.NewFacility("connections", "Connection handling")
)
Use more inclusive copyright header 2014-11-16 21:13:20 +01:00			`// Copyright (C) 2014 The Syncthing Authors.`
Relicense to GPL 2014-09-29 21:43:32 +02:00			`//`
MPLv2 2015-03-07 21:36:35 +01:00			`// This Source Code Form is subject to the terms of the Mozilla Public`
			`// License, v. 2.0. If a copy of the MPL was not distributed with this file,`
all: Update license url to https (ref #3976) 2017-02-09 07:52:18 +01:00			`// You can obtain one at https://mozilla.org/MPL/2.0/.`
Add license header 2014-06-01 22:50:14 +02:00
Decouple connections service from model The connections service no longer depends directly on the syncthing model object, but on an interface instead. This makes it drastically easier to write clients that handle the model differently, but still want to benefit from existing and future connections changes in the core. This was motivated by burkemw3's interest in creating a FUSE client that can present a view of the global model, but not have all of the file data locally. The actual decoupling was done by adding a connections.Model interface. This interface is effectively an extension of the protocol.Model interface that also handles connections alongside the modified service. 2015-09-23 16:03:36 -04:00			`package connections`
Rate limit sent data, not uncompressed 2014-04-01 20:36:54 +02:00
			`import (`
Implement facility based logger, debugging via REST API This implements a new debug/trace infrastructure based on a slightly hacked up logger. Instead of the traditional "if debug { ... }" I've rewritten the logger to have no-op Debugln and Debugf, unless debugging has been enabled for a given "facility". The "facility" is just a string, typically a package name. This will be slightly slower than before; but not that much as it's mostly a function call that returns immediately. For the cases where it matters (the Debugln takes a hex.Dump() of something for example, and it's not in a very occasional "if err != nil" branch) there is an l.ShouldDebug(facility) that is fast enough to be used like the old "if debug". The point of all this is that we can now toggle debugging for the various packages on and off at runtime. There's a new method /rest/system/debug that can be POSTed a set of facilities to enable and disable debug for, or GET from to get a list of facilities with descriptions and their current debug status. Similarly a /rest/system/log?since=... can grab the latest log entries, up to 250 of them (hardcoded constant in main.go) plus the initial few. Not implemented in this commit (but planned) is a simple debug GUI available on /debug that shows the current log in an easily pasteable format and has checkboxes to enable the various debug facilities. The debug instructions to a user then becomes "visit this URL, check these boxes, reproduce your problem, copy and paste the log". The actual log viewer on the hypothetical /debug URL can poll regularly for new log entries and this bypass the 250 line limit. The existing STTRACE=foo variable is still obeyed and just sets the start state of the system. 2015-10-03 17:25:21 +02:00			`"github.com/syncthing/syncthing/lib/logger"`
Rate limit sent data, not uncompressed 2014-04-01 20:36:54 +02:00			`)`

Decouple connections service from model The connections service no longer depends directly on the syncthing model object, but on an interface instead. This makes it drastically easier to write clients that handle the model differently, but still want to benefit from existing and future connections changes in the core. This was motivated by burkemw3's interest in creating a FUSE client that can present a view of the global model, but not have all of the file data locally. The actual decoupling was done by adding a connections.Model interface. This interface is effectively an extension of the protocol.Model interface that also handles connections alongside the modified service. 2015-09-23 16:03:36 -04:00			`var (`
Implement facility based logger, debugging via REST API This implements a new debug/trace infrastructure based on a slightly hacked up logger. Instead of the traditional "if debug { ... }" I've rewritten the logger to have no-op Debugln and Debugf, unless debugging has been enabled for a given "facility". The "facility" is just a string, typically a package name. This will be slightly slower than before; but not that much as it's mostly a function call that returns immediately. For the cases where it matters (the Debugln takes a hex.Dump() of something for example, and it's not in a very occasional "if err != nil" branch) there is an l.ShouldDebug(facility) that is fast enough to be used like the old "if debug". The point of all this is that we can now toggle debugging for the various packages on and off at runtime. There's a new method /rest/system/debug that can be POSTed a set of facilities to enable and disable debug for, or GET from to get a list of facilities with descriptions and their current debug status. Similarly a /rest/system/log?since=... can grab the latest log entries, up to 250 of them (hardcoded constant in main.go) plus the initial few. Not implemented in this commit (but planned) is a simple debug GUI available on /debug that shows the current log in an easily pasteable format and has checkboxes to enable the various debug facilities. The debug instructions to a user then becomes "visit this URL, check these boxes, reproduce your problem, copy and paste the log". The actual log viewer on the hypothetical /debug URL can poll regularly for new log entries and this bypass the 250 line limit. The existing STTRACE=foo variable is still obeyed and just sets the start state of the system. 2015-10-03 17:25:21 +02:00			`l = logger.DefaultLogger.NewFacility("connections", "Connection handling")`
Decouple connections service from model The connections service no longer depends directly on the syncthing model object, but on an interface instead. This makes it drastically easier to write clients that handle the model differently, but still want to benefit from existing and future connections changes in the core. This was motivated by burkemw3's interest in creating a FUSE client that can present a view of the global model, but not have all of the file data locally. The actual decoupling was done by adding a connections.Model interface. This interface is effectively an extension of the protocol.Model interface that also handles connections alongside the modified service. 2015-09-23 16:03:36 -04:00			`)`