add SetOptions method

有了这个方法就可以随时改变配置

client/go/client.go

@@ -4,8 +4,6 @@ import (
 	"net/http"
 	"io/ioutil"
 	"io"
-	"crypto/sha256"
-	"encoding/hex"
 	"encoding/json"
 	"time"
 	"bytes"
@@ -105,9 +103,8 @@ func parseResp(body []byte) (*Resp, error) {
 }
 
 type Client struct {
-	opts        *options
-	sha256Token string
-	httpClient  *http.Client
+	opts       *options
+	httpClient *http.Client
 }
 
 func (c *Client) request(method, path string, body io.Reader) (resp *Resp, err error) {
@@ -115,7 +112,7 @@ func (c *Client) request(method, path string, body io.Reader) (resp *Resp, err e
 	if err != nil {
 		return
 	}
-	req.Header.Set("X-Judge-Server-Token", c.sha256Token)
+	req.Header.Set("X-Judge-Server-Token", c.opts.sha256Token)
 	req.Header.Set("Content-Type", "application/json")
 
 	httpResp, err := c.httpClient.Do(req)
@@ -162,15 +159,24 @@ func New(endpointURL, token string, timeout time.Duration) *Client {
 	)
 }
 
+func (c *Client) SetOptions(options ...Option) {
+	originTimeout := c.opts.Timeout
+	for _, o := range options {
+		o(c.opts)
+	}
+	if c.opts.Timeout != originTimeout {
+		c.httpClient.Timeout = c.opts.Timeout
+	}
+}
+
 func NewClient(options ...Option) *Client {
 	opts := DefaultOptions
 	for _, o := range options {
 		o(opts)
 	}
-	sha256Token := sha256.Sum256([]byte(opts.Token))
+
 	return &Client{
-		opts:        opts,
-		sha256Token: hex.EncodeToString(sha256Token[:]),
+		opts: opts,
 		httpClient: &http.Client{
 			Timeout: opts.Timeout,
 		},

client/go/examples/example.go

@@ -58,12 +58,21 @@ print(int(s1[0]) + int(s1[1]))
 )
 
 func main() {
-	// 创建一个client。 这句代码等价于  judge.New("http://127.0.0.1:12358", "YOUR_TOKEN_HERE", 0)
-	client := judge.NewClient(
-		judge.WithEndpointURL("http://127.0.0.1:12358"),
-		judge.WithToken("YOUR_TOKEN_HERE"),
-		judge.WithTimeout(0),
-	)
+	// 创建一个client。 这句代码等价于
+
+	// 1.
+	//client := judge.NewClient(
+	//	judge.WithEndpointURL("http://127.0.0.1:12358"),
+	//	judge.WithToken("YOUR_TOKEN_HERE"),
+	//	judge.WithTimeout(0),
+	//)
+
+	// 2.
+	// client := judge.New("http://127.0.0.1:12358", "YOUR_TOKEN_HERE", 0)
+
+	// 3.
+	client := judge.NewClient(judge.WithTimeout(0))
+	client.SetOptions(judge.WithEndpointURL("http://127.0.0.1:12358"), judge.WithToken("YOUR_TOKEN_HERE"))
 
 	fmt.Println("ping:")
 	resp, err := client.Ping()

client/go/options.go

@@ -1,11 +1,16 @@
 package judge
 
-import "time"
+import (
+	"time"
+	"crypto/sha256"
+	"encoding/hex"
+)
 
 type options struct {
 	// scheme://host:port .
 	EndpointURL string
 	Token       string
+	sha256Token string
 	// 请求超时时间
 	// 如果 Timeout 为 0，那么意味着不会超时
 	Timeout time.Duration
@@ -28,6 +33,8 @@ func WithEndpointURL(u string) Option {
 func WithToken(token string) Option {
 	return func(o *options) {
 		o.Token = token
+		sha256Token := sha256.Sum256([]byte(token))
+		o.sha256Token = hex.EncodeToString(sha256Token[:])
 	}
 }