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package main
import (
"context"
"crypto/tls"
"fmt"
"strings"
sr "tildegit.org/tjp/sliderule"
"tildegit.org/tjp/sliderule/contrib/cgi"
"tildegit.org/tjp/sliderule/contrib/fs"
"tildegit.org/tjp/sliderule/gemini"
"tildegit.org/tjp/sliderule/gemini/gemtext/atomconv"
"tildegit.org/tjp/sliderule/logging"
"tildegit.org/tjp/syw"
)
func buildGeminiServers(servers []Server, config *Configuration) ([]sr.Server, error) {
_, info, _, errlog := Loggers(config)
groups := map[string][]*Server{}
for i := range servers {
addr := fmt.Sprintf("%s:%d", servers[i].IP.String(), servers[i].Port)
grp, ok := groups[addr]
if !ok {
groups[addr] = []*Server{&servers[i]}
} else {
groups[addr] = append(grp, &servers[i])
}
}
result := []sr.Server{}
for addr, configs := range groups {
_ = info.Log("msg", "starting gemini server", "addr", addr)
var handler sr.Handler
if len(configs) == 1 {
handler = routes(*configs[0])
} else {
mapping := map[string]sr.Handler{}
for _, config := range configs {
router := routes(*config)
for _, hostname := range config.Hostnames {
mapping[hostname] = router
}
}
handler = sr.VirtualHosts(mapping, sr.HandlerFunc(func(_ context.Context, _ *sr.Request) *sr.Response {
return gemini.RefuseProxy("Proxy request refused")
}))
}
var hostname string
for _, conf := range configs {
if len(conf.Hostnames) > 0 {
hostname = conf.Hostnames[0]
break
}
}
tlsConfigs := map[string]*tls.Config{}
var fallback *tls.Config = nil
for _, config := range configs {
if len(config.Hostnames) > 0 && config.TLS != nil {
for _, hostname := range config.Hostnames {
tlsConfigs[hostname] = config.TLS
}
} else {
fallback = config.TLS
}
}
tlsConfig := gemini.MultiTLS(tlsConfigs, fallback)
gemsrv, err := gemini.NewServer(
context.Background(),
hostname,
"tcp",
addr,
logging.LogRequests(info)(handler),
errlog,
tlsConfig,
)
if err != nil {
return nil, err
}
result = append(result, gemsrv)
}
return result, nil
}
func addGeminiRoute(router *sr.Router, route RouteDirective) {
switch route.Type {
case "static":
addGeminiStaticRoute(router, route)
case "cgi":
buildAndAddRoute(router, route, func(route RouteDirective) sr.Handler {
handler := cgi.GeminiCGIDirectory(route.FsPath, route.URLPath, route.Modifiers.ExecCmd)
if route.Modifiers.AutoAtom {
handler = atomconv.Auto(handler)
}
return GeminiAuthMiddleware(route.Auth)(handler)
})
case "git":
addGeminiGitRoute(router, route)
}
}
func addGeminiStaticRoute(router *sr.Router, route RouteDirective) {
buildAndAddRoute(router, route, func(route RouteDirective) sr.Handler {
handlers := []sr.Handler{}
if route.Modifiers.Exec {
handlers = append(handlers, cgi.GeminiCGIDirectory(route.FsPath, route.URLPath, route.Modifiers.ExecCmd))
}
handlers = append(handlers, fs.GeminiFileHandler(route.FsPath, route.URLPath))
if route.Modifiers.DirDefault != "" {
handlers = append(
handlers,
fs.GeminiDirectoryDefault(route.FsPath, route.URLPath, route.Modifiers.DirDefault),
)
}
if route.Modifiers.DirList {
handlers = append(handlers, fs.GeminiDirectoryListing(route.FsPath, route.URLPath, nil))
}
handler := sr.FallthroughHandler(handlers...)
if route.Modifiers.AutoAtom {
handler = atomconv.Auto(handler)
}
handler = GeminiAuthMiddleware(route.Auth)(handler)
if route.Modifiers.Titan != nil {
titan := fs.TitanUpload(route.FsPath, route.URLPath, route.Modifiers.Titan.Strategy.Approve)(handler)
handler = sr.Filter(func(ctx context.Context, request *sr.Request) bool {
return request.Scheme == "titan"
}, handler)(titan)
}
return handler
})
}
func addGeminiGitRoute(router *sr.Router, route RouteDirective) {
buildAndAddRoute(router, route, func(route RouteDirective) sr.Handler {
handler := sr.HandlerFunc(func(ctx context.Context, request *sr.Request) *sr.Response {
subrouter := syw.GeminiRouter(route.FsPath, route.Modifiers.Templates)
reqclone := cloneRequest(request)
reqclone.Path = strings.TrimPrefix(reqclone.Path, route.URLPath)
handler, params := subrouter.Match(reqclone)
if handler == nil {
return nil
}
return handler.Handle(context.WithValue(ctx, sr.RouteParamsKey, params), request)
})
if route.Modifiers.AutoAtom {
handler = atomconv.Auto(handler)
}
return GeminiAuthMiddleware(route.Auth)(handler)
})
}
|
