html - GAE Golang template parsing error - "operation not permitted" -

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i developing google app engine go application , need use html templates in 1 of packages. current file structure is:

gopath/github.com/name/project/                                app/                                    app.go                                    app.yaml                                package/                                        package.go                                        templates/                                                  template.html

to include package, use:

import "github.com/name/project/package"

inside of package.go, try parsing template.html file in various ways:

//template, err := template.parsefiles("package/templates/template.html") //doesn't work - "the system cannot find path specified." //template, err := template.parsefiles("github.com/name/project/package/templates/template.html") //doesn't work - "the system cannot find path specified." //template, err := template.parsefiles("templates/template.html") //doesn't work - "the system cannot find path specified." //template, err := template.parsefiles("/templates/template.html") //doesn't work - "the system cannot find path specified." template, err := template.parsefiles("../package/templates/template.html") //works on desktop!

so take last option works on desktop test environment, upload appengine , new error of "operation not permitted"...

how parse html templates such file configuration shown above works both on app engine , on desktop?

you need have app.yaml @ root of application. app engine uses location of app.yaml figure out files associated application. want move file top-level.

for example, let's have like: 

app.go app.yaml templates/t1 templates/t2

where app.yaml you'd have application, app.go is:

package app  import (     "html/template"     "net/http" )  var templates = template.must(template.parseglob("templates/*"))  func init() {     http.handlefunc("/", roothandler) }  func roothandler(w http.responsewriter, r *http.request) {     name := r.url.path[1:]    // drop leading slash     tmpl := templates.lookup(name)     if tmpl == nil {         http.notfound(w, r)         return     }     tmpl.execute(w, nil) }

and templates/t1 , templates/t2 appropriate template files. once have this, can visit t1/ , t2/ in resulting webapp, , should serve , deploy fine on app engine.

the key have app.yaml @ toplevel directory of application. 1 other caveat keep in mind: make sure files you're trying read dynamic application not statically served or skipped. check app.yaml. if file statically served, front-end allowed see file, means back-end won't. , skipped files ignored altogether during deployment.


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