Does calling the cancel func on a context that is attached to a
http.Request change the contents of the body to context cancellation?
On Friday, 15 September 2017 18:15:25 UTC+1, Steven Lee wrote:
>
> Hello,
>
> I was wondering if anyone could help me with understanding the behaviour
> of cancelling context on a request before its read.
>
> I am using golang 1.9 on macOS X sierra (latest)
>
> Sometimes this code returns context cancelled, sometimes it works.
>
> package main
>
> import (
> "context"
> "io/ioutil"
> "log"
> "net/http"
> "time"
>
> "golang.org/x/net/context/ctxhttp"
> )
>
> func main() {
> req, err := http.NewRequest("GET", "https://swapi.co/api/people/1";,
> nil)
> if err != nil {
> log.Fatal(err)
> }
> resp, err := fetch(req)
> if err != nil {
> log.Fatal(err)
> }
> log.Print(readBody(resp))
> }
>
> func fetch(req *http.Request) (*http.Response, error) {
> ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second
> )
> defer cancel()
> return ctxhttp.Do(ctx, http.DefaultClient, req)
> }
>
> func readBody(resp *http.Response) (string, error) {
> b, err := ioutil.ReadAll(resp.Body)
> if err != nil {
> return "", err
> }
> return string(b), err
> }
>
>
>
>
>
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