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cloudkeys-go/httpHelper.go

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package main
import (
"context"
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"net/http"
"github.com/flosch/pongo2"
"github.com/gorilla/sessions"
log "github.com/sirupsen/logrus"
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)
type httpHelperFunc func(c context.Context, res http.ResponseWriter, r *http.Request, session *sessions.Session, ctx *pongo2.Context) (*string, error)
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func httpHelper(f httpHelperFunc) http.HandlerFunc {
return func(res http.ResponseWriter, r *http.Request) {
sess, _ := cookieStore.Get(r, "cloudkeys-go")
ctx := pongo2.Context{}
if errFlash := sess.Flashes("error"); len(errFlash) > 0 {
ctx["error"] = errFlash[0].(string)
}
c := getContext(r)
template, err := f(c, res, r, sess, &ctx)
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if err != nil {
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http.Error(res, "An error ocurred.", http.StatusInternalServerError)
log.WithError(err).Error("Unable to execute template")
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return
}
if template != nil {
ts := pongo2.NewSet("frontend", pongo2.MustNewLocalFileSystemLoader("templates"))
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tpl, err := ts.FromFile(*template)
if err != nil {
log.WithError(err).WithFields(log.Fields{
"template": *template,
}).Error("Could not parse template")
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http.Error(res, "An error ocurred.", http.StatusInternalServerError)
return
}
out, err := tpl.Execute(ctx)
if err != nil {
log.WithError(err).WithFields(log.Fields{
"template": *template,
}).Error("Could not execute template")
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http.Error(res, "An error ocurred.", http.StatusInternalServerError)
return
}
res.Write([]byte(out))
}
}
}
func simpleTemplateOutput(template string) httpHelperFunc {
return func(c context.Context, res http.ResponseWriter, r *http.Request, session *sessions.Session, ctx *pongo2.Context) (*string, error) {
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return &template, nil
}
}
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func stringPointer(s string) *string {
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return &s
}