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package main
import (
"context"
"fmt"
"strings"
sr "tildegit.org/tjp/sliderule"
"tildegit.org/tjp/sliderule/contrib/cgi"
"tildegit.org/tjp/sliderule/contrib/fs"
"tildegit.org/tjp/sliderule/gopher"
"tildegit.org/tjp/sliderule/gopher/gophermap"
"tildegit.org/tjp/sliderule/logging"
"tildegit.org/tjp/syw"
)
func buildGopherServer(server Server, config *Configuration) (sr.Server, error) {
addr := fmt.Sprintf("%s:%d", server.IP.String(), server.Port)
_, info, _, errlog := Loggers(config)
_ = info.Log("msg", "starting gopher server", "addr", addr)
return gopher.NewServer(
context.Background(),
server.Hostnames[0],
"tcp",
addr,
logging.LogRequests(info)(routes(server)),
errlog,
)
}
func addGopherRoute(router *sr.Router, route RouteDirective) {
switch route.Type {
case "static":
addGopherStaticRoute(router, route)
case "cgi":
addGopherCGIRoute(router, route)
case "git":
addGopherGitRoute(router, route)
}
}
func addGopherStaticRoute(router *sr.Router, route RouteDirective) {
dirmaps := []string{}
if route.Modifiers.DirDefault != "" {
dirmaps = append(dirmaps, route.Modifiers.DirDefault)
}
settings := &gophermap.FileSystemSettings{
ParseExtended: route.Modifiers.ExtendedGophermap,
Exec: route.Modifiers.Exec,
ListUsers: false,
DirMaps: dirmaps,
}
buildAndAddRoute(router, route, func(route RouteDirective) sr.Handler {
handlers := []sr.Handler{}
if route.Modifiers.Exec {
handlers = append(handlers, cgi.ExecGopherMaps(route.FsPath, route.URLPath, route.Modifiers.ExecCmd, settings))
}
handlers = append(handlers, fs.GopherFileHandler(route.FsPath, route.URLPath, settings))
if route.Modifiers.DirDefault != "" {
handlers = append(handlers, fs.GopherDirectoryDefault(route.FsPath, route.URLPath, settings))
}
if route.Modifiers.DirList {
handlers = append(handlers, fs.GopherDirectoryListing(route.FsPath, route.URLPath, settings))
}
if len(handlers) == 1 {
return handlers[0]
}
return sr.FallthroughHandler(handlers...)
})
}
func addGopherCGIRoute(router *sr.Router, route RouteDirective) {
dirmaps := []string{}
if route.Modifiers.DirDefault != "" {
dirmaps = append(dirmaps, route.Modifiers.DirDefault)
}
settings := &gophermap.FileSystemSettings{
ParseExtended: route.Modifiers.ExtendedGophermap,
Exec: true,
ListUsers: false,
DirMaps: dirmaps,
}
buildAndAddRoute(router, route, func(route RouteDirective) sr.Handler {
return cgi.GopherCGIDirectory(route.FsPath, route.URLPath, route.Modifiers.ExecCmd, settings)
})
}
func addGopherGitRoute(router *sr.Router, route RouteDirective) {
buildAndAddRoute(router, route, func(route RouteDirective) sr.Handler {
return sr.HandlerFunc(func(ctx context.Context, request *sr.Request) *sr.Response {
subrouter := syw.GopherRouter(route.FsPath, nil)
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)
})
})
}
func cloneRequest(request *sr.Request) *sr.Request {
r := *request
u := *request.URL
r.URL = &u
return &r
}
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