mirror of
https://codeberg.org/Codeberg/pages-server.git
synced 2024-11-18 10:29:43 +00:00
96 lines
3.1 KiB
Go
96 lines
3.1 KiB
Go
package main
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import (
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"github.com/OrlovEvgeny/go-mcache"
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"github.com/valyala/fasthttp"
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"net"
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"strings"
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"time"
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)
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// DnsLookupCacheTimeout specifies the timeout for the DNS lookup cache.
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var DnsLookupCacheTimeout = 15*time.Minute
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// dnsLookupCache stores DNS lookups for custom domains
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var dnsLookupCache = mcache.New()
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// getTargetFromDNS searches for CNAME or TXT entries on the request domain ending with MainDomainSuffix.
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// If everything is fine, it returns the target data.
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func getTargetFromDNS(domain string) (targetOwner, targetRepo, targetBranch string) {
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// Get CNAME or TXT
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var cname string
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var err error
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if cachedName, ok := dnsLookupCache.Get(domain); ok {
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cname = cachedName.(string)
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} else {
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cname, err = net.LookupCNAME(domain)
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cname = strings.TrimSuffix(cname, ".")
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if err != nil || !strings.HasSuffix(cname, string(MainDomainSuffix)) {
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cname = ""
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// TODO: check if the A record matches!
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names, err := net.LookupTXT(domain)
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if err == nil {
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for _, name := range names {
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name = strings.TrimSuffix(name, ".")
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if strings.HasSuffix(name, string(MainDomainSuffix)) {
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cname = name
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break
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}
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}
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}
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}
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_ = dnsLookupCache.Set(domain, cname, DnsLookupCacheTimeout)
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}
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if cname == "" {
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return
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}
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cnameParts := strings.Split(strings.TrimSuffix(cname, string(MainDomainSuffix)), ".")
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targetOwner = cnameParts[len(cnameParts)-1]
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if len(cnameParts) > 1 {
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targetRepo = cnameParts[len(cnameParts)-1]
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}
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if len(cnameParts) > 2 {
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targetBranch = cnameParts[len(cnameParts)-2]
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}
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if targetRepo == "" {
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targetRepo = "pages"
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}
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if targetBranch == "" && targetRepo != "pages" {
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targetBranch = "pages"
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}
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// if targetBranch is still empty, the caller must find the default branch
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return
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}
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// CanonicalDomainCacheTimeout specifies the timeout for the canonical domain cache.
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var CanonicalDomainCacheTimeout = 15*time.Minute
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// canonicalDomainCache stores canonical domains
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var canonicalDomainCache = mcache.New()
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// checkCanonicalDomain returns the canonical domain specified in the repo (using the file `.canonical-domain`).
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func checkCanonicalDomain(targetOwner, targetRepo, targetBranch string) (canonicalDomain string) {
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// Check if the canonical domain matches
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if cachedValue, ok := canonicalDomainCache.Get(targetOwner + "/" + targetRepo + "/" + targetBranch); ok {
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canonicalDomain = cachedValue.(string)
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} else {
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req := fasthttp.AcquireRequest()
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req.SetRequestURI(string(GiteaRoot) + "/api/v1/repos/" + targetOwner + "/" + targetRepo + "/raw/" + targetBranch + "/.domains")
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res := fasthttp.AcquireResponse()
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err := upstreamClient.Do(req, res)
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if err == nil && res.StatusCode() == fasthttp.StatusOK {
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canonicalDomain = strings.TrimSpace(string(res.Body()))
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if strings.Contains(canonicalDomain, "/") {
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canonicalDomain = ""
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}
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}
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if canonicalDomain == "" {
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canonicalDomain = targetOwner + string(MainDomainSuffix)
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if targetRepo != "" && targetRepo != "pages" {
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canonicalDomain += "/" + targetRepo
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}
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}
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_ = canonicalDomainCache.Set(targetOwner + "/" + targetRepo + "/" + targetBranch, canonicalDomain, CanonicalDomainCacheTimeout)
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}
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return
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}
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