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package main
import (
"context"
"fmt"
"os"
"os/user"
"path/filepath"
"strings"
sr "tildegit.org/tjp/sliderule"
"tildegit.org/tjp/sliderule/contrib/cgi"
"tildegit.org/tjp/sliderule/finger"
"tildegit.org/tjp/sliderule/logging"
)
func buildFingerServer(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 finger server", "addr", addr)
if len(server.Routes) != 1 {
return nil, fmt.Errorf("finger server must have 1 route directive, found %d", len(server.Routes))
}
if server.TLS != nil {
return finger.NewTLSServer(
context.Background(),
"",
"tcp",
addr,
logging.LogRequests(info)(fingerHandler(server.Routes[0])),
errlog,
server.TLS,
)
}
return finger.NewServer(
context.Background(),
"",
"tcp",
addr,
logging.LogRequests(info)(fingerHandler(server.Routes[0])),
errlog,
)
}
func fingerHandler(route RouteDirective) sr.Handler {
if route.Type != "static" && route.Type != "cgi" {
panic("invalid finger route type '" + route.Type + "'")
}
return sr.HandlerFunc(func(ctx context.Context, request *sr.Request) *sr.Response {
u, err := user.Lookup(strings.TrimPrefix(request.Path, "/"))
if err != nil {
return nil
}
var fpath string
if strings.HasPrefix(route.FsPath, "~/") {
fpath = filepath.Join(u.HomeDir, route.FsPath[2:])
} else {
fpath = strings.Replace(route.FsPath, "~", u.Username, 1)
}
st, err := os.Stat(fpath)
if err != nil {
return finger.Error(err.Error())
}
if !st.Mode().IsRegular() {
return nil
}
if st.Mode()&5 == 5 && (route.Modifiers.Exec || route.Type == "cgi") {
workdir := filepath.Dir(fpath)
if route.Modifiers.ExecCmd != "" {
fpath = route.Modifiers.ExecCmd
}
buf, code, err := cgi.RunCGI(ctx, request, fpath, "/", workdir, nil)
if err != nil {
return finger.Error("execution error")
}
if code != 0 {
return finger.Error(fmt.Sprintf("execution error: code %d", code))
}
return finger.Success(buf)
}
if route.Type != "static" {
return nil
}
file, err := os.Open(fpath)
if err != nil {
return finger.Error(err.Error())
}
return finger.Success(file)
})
}
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