Fetch polyfill for go-duktape.
First of all install the package go get gopkg.in/olebedev/go-duktape-fetch.v2.
package main
import (
"fmt"
"gopkg.in/olebedev/go-duktape.v2"
"gopkg.in/olebedev/go-duktape-fetch.v2"
)
func main() {
// create an ecmascript context
ctx := duktape.New()
// push fetch into the global scope
fetch.PushGlobal(ctx, nil)
ch := make(chan string)
ctx.PushGlobalGoFunction("cbk", func(c *duktape.Context) int {
ch <- c.SafeToString(-1)
return 0
})
// make a request
ctx.PevalString(`
fetch('http://ya.ru').then(function(resp) {
return resp.text();
}).then(function(body) {
// release channel
cbk(body.slice(0, 15));
});
`)
// print head line of the response body
fmt.Println(<-ch)
}This program will prodice <!DOCTYPE html> into stdout.
Also you can define fetch with some other good possibilities. In
particular you can specify local http instance with http.Handler
interface as a the second parameter. It will be used for all local
requests which url starts with /(single slash). See tests
for more detail.