fork from codeberg.org

server/upstream/domains.go

@@ -0,0 +1,70 @@
+package upstream
+
+import (
+	"errors"
+	"strings"
+	"time"
+
+	"github.com/rs/zerolog/log"
+
+	"pages-server/server/cache"
+	"pages-server/server/gitea"
+)
+
+// canonicalDomainCacheTimeout specifies the timeout for the canonical domain cache.
+var canonicalDomainCacheTimeout = 15 * time.Minute
+
+const canonicalDomainConfig = ".domains"
+
+// CheckCanonicalDomain returns the canonical domain specified in the repo (using the `.domains` file).
+func (o *Options) CheckCanonicalDomain(giteaClient *gitea.Client, actualDomain, mainDomainSuffix string, canonicalDomainCache cache.ICache) (domain string, valid bool) {
+	// Check if this request is cached.
+	if cachedValue, ok := canonicalDomainCache.Get(o.TargetOwner + "/" + o.TargetRepo + "/" + o.TargetBranch); ok {
+		domains := cachedValue.([]string)
+		for _, domain := range domains {
+			if domain == actualDomain {
+				valid = true
+				break
+			}
+		}
+		return domains[0], valid
+	}
+
+	body, err := giteaClient.GiteaRawContent(o.TargetOwner, o.TargetRepo, o.TargetBranch, canonicalDomainConfig)
+	if err != nil && !errors.Is(err, gitea.ErrorNotFound) {
+		log.Error().Err(err).Msgf("could not read %s of %s/%s", canonicalDomainConfig, o.TargetOwner, o.TargetRepo)
+	}
+
+	var domains []string
+	for _, domain := range strings.Split(string(body), "\n") {
+		domain = strings.ToLower(domain)
+		domain = strings.TrimSpace(domain)
+		domain = strings.TrimPrefix(domain, "http://")
+		domain = strings.TrimPrefix(domain, "http://")
+		if domain != "" && !strings.HasPrefix(domain, "#") && !strings.ContainsAny(domain, "\t /") && strings.ContainsRune(domain, '.') {
+			domains = append(domains, domain)
+		}
+		if domain == actualDomain {
+			valid = true
+		}
+	}
+
+	// Add [owner].[pages-domain] as valid domain.
+	domains = append(domains, o.TargetOwner+mainDomainSuffix)
+	if domains[len(domains)-1] == actualDomain {
+		valid = true
+	}
+
+	// If the target repository isn't called pages, add `/[repository]` to the
+	// previous valid domain.
+	if o.TargetRepo != "" && o.TargetRepo != "pages" {
+		domains[len(domains)-1] += "/" + o.TargetRepo
+	}
+
+	// Add result to cache.
+	_ = canonicalDomainCache.Set(o.TargetOwner+"/"+o.TargetRepo+"/"+o.TargetBranch, domains, canonicalDomainCacheTimeout)
+
+	// Return the first domain from the list and return if any of the domains
+	// matched the requested domain.
+	return domains[0], valid
+}