Hotfix/857

client/client.go

@@ -15,6 +15,7 @@ import (
 type Client struct {
 	url    string
 	client *http.Client
+	Header http.Header
 }
 
 // New creates a graphql client
@@ -23,6 +24,9 @@ func New(url string, client ...*http.Client) *Client {
 		url: url,
 	}
 
+	p.Header = http.Header{}
+	p.Header.Add("Content-Type", "application/json")
+
 	if len(client) > 0 {
 		p.client = client[0]
 	} else {
@@ -101,7 +105,12 @@ func (p *Client) RawPost(query string, options ...Option) (*ResponseData, error)
 		return nil, fmt.Errorf("encode: %s", err.Error())
 	}
 
-	rawResponse, err := p.client.Post(p.url, "application/json", bytes.NewBuffer(requestBody))
+	req, err := http.NewRequest("POST", p.url, bytes.NewBuffer(requestBody))
+	if err != nil {
+		return nil, fmt.Errorf("creating request: %s", err.Error())
+	}
+	req.Header = p.Header
+	rawResponse, err := p.client.Do(req)
 	if err != nil {
 		return nil, fmt.Errorf("post: %s", err.Error())
 	}

client/client_test.go

@@ -39,3 +39,33 @@ func TestClient(t *testing.T) {
 
 	require.Equal(t, "bob", resp.Name)
 }
+
+func TestClientWithHeader(t *testing.T) {
+	h := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		b, err := ioutil.ReadAll(r.Body)
+		if err != nil {
+			panic(err)
+		}
+		require.Equal(t, `{"query":"user(id:$id){name}","variables":{"id":1}}`, string(b))
+
+		err = json.NewEncoder(w).Encode(map[string]interface{}{
+			"data": map[string]interface{}{
+				"name": "bob",
+			},
+		})
+		if err != nil {
+			panic(err)
+		}
+	}))
+
+	c := client.New(h.URL)
+	c.Header.Add("Authorization", "mytoken")
+
+	var resp struct {
+		Name string
+	}
+
+	c.MustPost("user(id:$id){name}", &resp, client.Var("id", 1))
+
+	require.Equal(t, "bob", resp.Name)
+}