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path: root/plugin/kubernetes/parse.go
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package kubernetes

import (
	"github.com/coredns/coredns/plugin/pkg/dnsutil"

	"github.com/miekg/dns"
)

type recordRequest struct {
	// The named port from the kubernetes DNS spec, this is the service part (think _https) from a well formed
	// SRV record.
	port string
	// The protocol is usually _udp or _tcp (if set), and comes from the protocol part of a well formed
	// SRV record.
	protocol string
	endpoint string
	// The servicename used in Kubernetes.
	service string
	// The namespace used in Kubernetes.
	namespace string
	// A each name can be for a pod or a service, here we track what we've seen, either "pod" or "service".
	podOrSvc string
}

// parseRequest parses the qname to find all the elements we need for querying k8s. Anything
// that is not parsed will have the wildcard "*" value (except r.endpoint).
// Potential underscores are stripped from _port and _protocol.
func parseRequest(name, zone string) (r recordRequest, err error) {
	// 3 Possible cases:
	// 1. _port._protocol.service.namespace.pod|svc.zone
	// 2. (endpoint): endpoint.service.namespace.pod|svc.zone
	// 3. (service): service.namespace.pod|svc.zone

	base, _ := dnsutil.TrimZone(name, zone)
	// return NODATA for apex queries
	if base == "" || base == Svc || base == Pod {
		return r, nil
	}
	segs := dns.SplitDomainName(base)

	last := len(segs) - 1
	if last < 0 {
		return r, nil
	}
	r.podOrSvc = segs[last]
	if r.podOrSvc != Pod && r.podOrSvc != Svc {
		return r, errInvalidRequest
	}
	last--
	if last < 0 {
		return r, nil
	}

	r.namespace = segs[last]
	last--
	if last < 0 {
		return r, nil
	}

	r.service = segs[last]
	last--
	if last < 0 {
		return r, nil
	}

	// Because of ambiguity we check the labels left: 1: an endpoint. 2: port and protocol.
	// Anything else is a query that is too long to answer and can safely be delegated to return an nxdomain.
	switch last {
	case 0: // endpoint only
		r.endpoint = segs[last]
	case 1: // service and port
		r.protocol = stripUnderscore(segs[last])
		r.port = stripUnderscore(segs[last-1])

	default: // too long
		return r, errInvalidRequest
	}

	return r, nil
}

// stripUnderscore removes a prefixed underscore from s.
func stripUnderscore(s string) string {
	if len(s) == 0 {
		return s
	}
	if s[0] != '_' {
		return s
	}
	return s[1:]
}

// String returns a string representation of r, it just returns all fields concatenated with dots.
// This is mostly used in tests.
func (r recordRequest) String() string {
	s := r.port
	s += "." + r.protocol
	s += "." + r.endpoint
	s += "." + r.service
	s += "." + r.namespace
	s += "." + r.podOrSvc
	return s
}
value='release/0.17'>release/0.17 Unnamed repository; edit this file 'description' to name the repository.
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path: root/packages/astro/test/fixtures/astro-scripts (unfollow)
AgeCommit message (Expand)AuthorFilesLines
2022-03-01fix vite version (#2694)Gravatar Fred K. Schott 2-5/+5
2022-03-01fix: disable HMR during build (#2684)Gravatar Nate Moore 2-0/+6
2022-03-01[ci] update smoke tests (remote) (#2690)Gravatar github-actions[bot] 2-6/+4
2022-03-01[ci] collect statsGravatar FredKSchott 1-0/+1
2022-02-28[ci] update smoke tests (remote) (#2686)Gravatar github-actions[bot] 96-3363/+8217
2022-02-28[ci] update lockfile (#2687)Gravatar Fred K. Schott 1-101/+75
2022-03-01[ci] collect statsGravatar FredKSchott 1-0/+1
2022-02-28update ci branch nameGravatar Fred K. Schott 1-0/+2
2022-02-28Make smoke tests more deterministic (#2618)Gravatar Fred K. Schott 336-147/+34315
2022-02-28[ci] yarn formatGravatar natemoo-re 1-20/+20
2022-02-28[ci] release (#2683)astro@0.23.3Gravatar github-actions[bot] 31-54/+55
2022-02-28Fix typo (#2674)Gravatar Robin Millette 1-1/+1
2022-02-28[ci] update lockfile (#2676)Gravatar Fred K. Schott 1-6/+6
2022-02-28fix(runtime): do not render empty Fragment (#2667)Gravatar Mateus Esdras 1-0/+3
2022-02-28fix(hmr): HMR regression related to .astro updates (#2681)Gravatar Nate Moore 6-7/+24
2022-02-28Fix HTMLElement expression warning (#2675)Gravatar Jonathan Neal 1-1/+1
2022-02-28[ci] collect statsGravatar FredKSchott 1-0/+1
2022-02-27[ci] update lockfile (#2668)Gravatar Fred K. Schott 1-80/+80
2022-02-27[ci] collect statsGravatar FredKSchott 1-0/+1
2022-02-26[ci] collect statsGravatar FredKSchott 1-0/+1
2022-02-25[ci] yarn formatGravatar natemoo-re 1-20/+20
2022-02-25[ci] release (#2666)astro@0.23.2Gravatar github-actions[bot] 32-59/+57
2022-02-25[ci] yarn formatGravatar natemoo-re 2-12/+6
2022-02-25fix astro scoping of "@import" inside of style tags (#2656)Gravatar Fred K. Schott 3-6/+35
2022-02-25[ci] update lockfile (#2659)Gravatar Fred K. Schott 1-20/+20
2022-02-25feat: improve third-party Astro package compatability (#2665)Gravatar Nate Moore 3-6/+100
2022-02-25get new example working during buildGravatar Fred K. Schott 4-16/+21
2022-02-25[ci] yarn formatGravatar FredKSchott 1-7/+6
2022-02-25Add Non-HTML Pages example (#2637)Gravatar Joel Kuzmarski 11-0/+136
2022-02-25[ci] collect statsGravatar FredKSchott 1-0/+1
2022-02-24[ci] yarn formatGravatar natemoo-re 2-24/+24
2022-02-24[ci] release (#2641)astro@0.23.1@astrojs/markdown-remark@0.6.2Gravatar github-actions[bot] 38-90/+81
2022-02-24ensure utf8 encoding when serving html (#2654)Gravatar Fred K. Schott 3-4/+9
2022-02-24fix(core): Issue #2625. error with process.env.LANG larger than 5 (#2645)Gravatar Javier Cortés 2-1/+6
2022-02-24[ci] update lockfile (#2646)Gravatar Fred K. Schott 1-130/+124
2022-02-24chore: upgrade compiler (#2653)Gravatar Nate Moore 3-11/+11
2022-02-24[ci] yarn formatGravatar natemoo-re 2-5/+5
2022-02-24Add fine-grained HMR support (#2649)Gravatar Nate Moore 7-36/+37
2022-02-24[ci] collect statsGravatar FredKSchott 1-0/+1
2022-02-23Fixed incorrect types and imports (#2630)Gravatar Juan Martín Seery 27-35/+37
2022-02-23Add sass dev dep to blog-multiple-authors example (#2643)Gravatar Joel Kuzmarski 1-1/+2
2022-02-23Fix(component): align starting position in Markdown slot (#2631)Gravatar Shinobu Hayashi 4-6/+61
2022-02-23[ci] yarn formatGravatar matthewp 1-1/+1
2022-02-23Run all smoke tests with the static build (#2609)Gravatar Matthew Phillips 2-26/+32
2022-02-23[ci] collect statsGravatar FredKSchott 1-0/+1
2022-02-22[ci] update lockfile (#2624)Gravatar Fred K. Schott 1-171/+201
2022-02-22Fixed shiki import to work with "type": "module" (#2628)Gravatar Juan Martín Seery 3-5/+13