This allows direct access to the earlier protocol-specific Resolve
implementations. The guts of each protocol-specific resolver are in
the internal resolveOnce method, and we've added a new:
ResolveN(ctx, name, depth)
method to the public interface. There's also:
Resolve(ctx, name)
which wraps ResolveN using DefaultDepthLimit. The extra API endpoint
is intended to reduce the likelyhood of clients accidentally calling
the more dangerous ResolveN with a nonsensically high or infinite
depth. On IRC on 2015-05-17, Juan said:
15:34 <jbenet> If 90% of uses is the reduced API with no chance to
screw it up, that's a huge win.
15:34 <wking> Why would those 90% not just set depth=0 or depth=1,
depending on which they need?
15:34 <jbenet> Because people will start writing `r.Resolve(ctx, name,
d)` where d is a variable.
15:35 <wking> And then accidentally set that variable to some huge
number?
15:35 <jbenet> Grom experience, i've seen this happen _dozens_ of
times. people screw trivial things up.
15:35 <wking> Why won't those same people be using ResolveN?
15:36 <jbenet> Because almost every example they see will tell them to
use Resolve(), and they will mostly stay away from ResolveN.
The per-prodocol versions also resolve recursively within their
protocol. For example:
DNSResolver.Resolve(ctx, "ipfs.io", 0)
will recursively resolve DNS links until the referenced value is no
longer a DNS link.
I also renamed the multi-protocol ipfs NameSystem (defined in
namesys/namesys.go) to 'mpns' (for Multi-Protocol Name System),
because I wasn't clear on whether IPNS applied to the whole system or
just to to the DHT-based system. The new name is unambiguously
multi-protocol, which is good. It would be nice to have a distinct
name for the DHT-based link system.
Now that resolver output is always prefixed with a namespace and
unprefixed mpns resolver input is interpreted as /ipfs/,
core/corehttp/ipns_hostname.go can dispense with it's old manual
/ipfs/ injection.
Now that the Resolver interface handles recursion, we don't need the
resolveRecurse helper in core/pathresolver.go. The pathresolver
cleanup also called for an adjustment to FromSegments to more easily
get slash-prefixed paths.
Now that recursive resolution with the namesys/namesys.go composite
resolver always gets you to an /ipfs/... path, there's no need for the
/ipns/ special case in fuse/ipns/ipns_unix.go.
Now that DNS links can be things other than /ipfs/ or DHT-link
references (e.g. they could be /ipns/<domain-name> references) I've
also loosened the ParsePath logic to only attempt multihash validation
on IPFS paths. It checks to ensure that other paths have a
known-protocol prefix, but otherwise leaves them alone.
I also changed some key-stringification from .Pretty() to .String()
following the potential deprecation mentioned in util/key.go.
- updated go-ctxgroup and goprocess
ctxgroup: AddChildGroup was changed to AddChild. Used in two files:
- p2p/net/mock/mock_net.go
- routing/dht/dht.go
- updated context from hg repo to git
prev. commit in hg was ad01a6fcc8a19d3a4478c836895ffe883bd2ceab. (context: make parentCancelCtx iterative)
represents commit 84f8955a887232b6308d79c68b8db44f64df455c in git repo
- updated context to master (b6fdb7d8a4ccefede406f8fe0f017fb58265054c)
Aaron Jacobs (2):
net/context: Don't accept a context in the DoSomethingSlow example.
context: Be clear that users must cancel the result of WithCancel.
Andrew Gerrand (1):
go.net: use golang.org/x/... import paths
Bryan C. Mills (1):
net/context: Don't leak goroutines in Done example.
Damien Neil (1):
context: fix removal of cancelled timer contexts from parent
David Symonds (2):
context: Fix WithValue example code.
net: add import comments.
Sameer Ajmani (1):
context: fix TestAllocs to account for ints in interfaces
