Feature client post method

README.md

@@ -167,6 +167,33 @@ func main() {
 }
 ```
 
+#### Use POST method
+
+To set custom query parameters on the client or disable the stream parameter altogether:
+
+```go
+func main() {
+
+	params := map[string]string{
+		"key": "value",
+	}
+	data := url.Values{}
+	for k, v := range params {
+		data.Add(k, v)
+	}
+	client := sse.NewClient("http://server/events?search=example", func(c *sse.Client) {
+		c.Headers["Content-Type"] = "application/x-www-form-urlencoded"
+		c.Method = http.MethodPost
+		c.Body = strings.NewReader(data.Encode())
+	})
+
+	client.SubscribeRaw(func(msg *sse.Event) {
+		// Got some data!
+		fmt.Println(msg.Data)
+	})
+}
+```
+
 
 ## Contributing
 

client.go

@@ -55,6 +55,8 @@ type Client struct {
 	mu                sync.Mutex
 	EncodingBase64    bool
 	Connected         bool
+	Method            string
+	Body              io.Reader
 }
 
 // NewClient creates a new client
@@ -65,6 +67,8 @@ func NewClient(url string, opts ...func(c *Client)) *Client {
 		Headers:       make(map[string]string),
 		subscribed:    make(map[chan *Event]chan struct{}),
 		maxBufferSize: 1 << 16,
+		Method:        http.MethodGet,
+		Body:          nil,
 	}
 
 	for _, opt := range opts {
@@ -289,7 +293,7 @@ func (c *Client) OnConnect(fn ConnCallback) {
 }
 
 func (c *Client) request(ctx context.Context, stream string) (*http.Response, error) {
-	req, err := http.NewRequest("GET", c.URL, nil)
+	req, err := http.NewRequest(c.Method, c.URL, c.Body)
 	if err != nil {
 		return nil, err
 	}