Add a cookie to HTTP post request

[kamac]

Hey there.

I am enjoying Golang so far, but it is not too easy to fully understand. (Lack of examples / tutorials :/)

Can anybody provide me with an example, of how would I go about adding a cookie to my Post request?

For example, I have this function:

func postExample() {
        values := make(url.Values)
        values.Set("some_var", "var1")
        r, err := http.PostForm("http://localhost/proj/test.php", values)
        if err != nil {
            fmt.Printf("error posting: %s", err)
            return
        }
        body, _ := ioutil.ReadAll(r.Body)
        r.Body.Close()
        fmt.Printf("stathat post result body: %s", body)
}

Any ideas?

Cheers 

[Kyle Lemons]

Have you looked at net/http/cookiejar?

http://godoc.org/net/http/cookiejar

One option is to create a cookie jar, create an http.Client with it, and use that to make your post requests.

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[Nigel Tao]

On Tue, Aug 13, 2013 at 7:30 AM, kamac <kama...@gmail.com> wrote:
> Can anybody provide me with an example, of how would I go about adding a
> cookie to my Post request?

Change

r, err := http.PostForm(etc)

to

c := &http.Client{Jar: jar}
r, err := c.PostForm(etc)

You will have to provide the jar variable that implements the
http.CookieJar interface. One option is to use the implementation
net/http/cookiejar package, if you're getting your cookie from an HTTP
request. You could also just hard-code the relevant cookies with a
one-off CookieJar implementation.

[kamac]

Okay, I'll try that too, but have you got any idea why this won't work? (I went with other advice that I got at golang-dev, where I accidentally posted this thread before)

client := &http.Client{};
req, _ := http.NewRequest("POST","http://localhost:8080/test/index.php",strings.NewReader("somevar=a"));
cookie := http.Cookie{"something","a","/",url,expire,expire.Format(time.UnixDate),86400,true,true,"something=a",[]string{"something=a"}};
req.Form.Add("somevar","HELLO");
resp, _ := client.Do(req);
body, _ := ioutil.ReadAll(resp.Body)
resp.Body.Close()
fmt.Println(string(body[:len(body)]));

My cookie works here, but POST variable does not (it's like it isn't being sent) 

[Kyle Lemons]

What are you doing with that cookie?  That doesn't look like it would compile (unused variable "cookie") -- you have to store it in the client's cookie jar. 

[kamac]

Ow, I forgot one line (which I have in my code):

req.AddCookie(&cookie);

[kamac]

Somehow,

req.Header.Set("Content-Type", "application/x-www-form-urlencoded; param=value")

Fixed it.

Cheers