客户端添加切换租户

client/README.md

@@ -23,7 +23,7 @@
 ```go
 import (
     "context"
-    "github.com/Tencent/WeKnora/internal/client"
+    "github.com/Tencent/WeKnora/client"
     "time"
 )
 
@@ -35,6 +35,26 @@ apiClient := client.NewClient(
 )
 ```
 
+### 租户配置
+
+客户端支持通过 `WithTenantID` 设置默认租户，请求时会自动携带 `X-Tenant-ID` 请求头：
+
+```go
+tenantID := uint64(10000)
+apiClient := client.NewClient(
+    "http://api.example.com",
+    client.WithToken("your-auth-token"),
+    client.WithTenantID(tenantID),
+)
+```
+
+如果某个请求需要临时切换租户，可以在 `context` 中设置 `TenantID`，值可以是 `uint64`、`*uint64` 或字符串形式的数字，客户端会优先使用该值：
+
+```go
+ctx := context.WithValue(context.Background(), "TenantID", uint64(10000))
+// 调用任意客户端方法时传入 ctx，即可切换到租户 10000
+```
+
 ### 示例：创建知识库并上传文件
 
 ```go

client/README_EN.md

@@ -23,7 +23,7 @@ The client includes the following main functional modules:
 ```go
 import (
     "context"
-    "github.com/Tencent/WeKnora/internal/client"
+    "github.com/Tencent/WeKnora/client"
     "time"
 )
 
@@ -35,6 +35,26 @@ apiClient := client.NewClient(
 )
 ```
 
+### Tenant Configuration
+
+You can set a default tenant with `WithTenantID`; the client will automatically send the `X-Tenant-ID` header:
+
+```go
+tenantID := uint64(10000)
+apiClient := client.NewClient(
+    "http://api.example.com",
+    client.WithToken("your-auth-token"),
+    client.WithTenantID(tenantID),
+)
+```
+
+If a single request needs a different tenant, set `TenantID` in the request context. The value can be a `uint64`, `*uint64`, or a numeric string, and it will take precedence over the client default:
+
+```go
+ctx := context.WithValue(context.Background(), "TenantID", uint64(10000))
+// Pass ctx into any client method to switch to tenant 10000 for that request
+```
+
 ### Example: Create Knowledge Base and Upload File
 
 ```go

client/client.go

@@ -10,6 +10,7 @@ import (
 	"io"
 	"net/http"
 	"net/url"
+	"strconv"
 	"time"
 )
 
@@ -18,6 +19,7 @@ type Client struct {
 	baseURL    string
 	httpClient *http.Client
 	token      string
+	tenantID   *uint64
 }
 
 // ClientOption defines client configuration options
@@ -37,6 +39,14 @@ func WithToken(token string) ClientOption {
 	}
 }
 
+// WithTenantID sets the tenant ID that will be included in requests as the X-Tenant-ID header.
+// It can be overridden per-request by setting the "TenantID" value in the request context.
+func WithTenantID(tenantID uint64) ClientOption {
+	return func(c *Client) {
+		c.tenantID = &tenantID
+	}
+}
+
 // NewClient creates a new client instance
 func NewClient(baseURL string, options ...ClientOption) *Client {
 	client := &Client{
@@ -84,6 +94,50 @@ func (c *Client) doRequest(ctx context.Context,
 		req.Header.Set("X-Request-ID", requestID.(string))
 	}
 
+	// Tenant header: prefer per-request context value, fall back to client-level tenantID
+	tenantID := c.tenantID
+
+	if ctxTenant := ctx.Value("TenantID"); ctxTenant != nil {
+		switch v := ctxTenant.(type) {
+		case *uint64:
+			if v != nil {
+				tenantID = v
+			}
+		case uint64:
+			tmp := v
+			tenantID = &tmp
+		case string:
+			if parsed, err := strconv.ParseUint(v, 10, 64); err == nil {
+				tmp := parsed
+				tenantID = &tmp
+			}
+		}
+	}
+
+	// 2) Fallback: plain string key "TenantID" (some callers may use this)
+	if tenantID == nil {
+		if ctxTenant := ctx.Value("TenantID"); ctxTenant != nil {
+			switch v := ctxTenant.(type) {
+			case *uint64:
+				if v != nil {
+					tenantID = v
+				}
+			case uint64:
+				tmp := v
+				tenantID = &tmp
+			case string:
+				if parsed, err := strconv.ParseUint(v, 10, 64); err == nil {
+					tmp := parsed
+					tenantID = &tmp
+				}
+			}
+		}
+	}
+
+	if tenantID != nil {
+		req.Header.Set("X-Tenant-ID", strconv.FormatUint(*tenantID, 10))
+	}
+
 	return c.httpClient.Do(req)
 }
 

client/example.go

@@ -21,12 +21,19 @@ import (
 // - Cleaning up resources
 func ExampleUsage() {
 	// Create a client instance
+	tenantID := uint64(10000) // default tenant for all requests from this client
 	apiClient := NewClient(
 		"http://localhost:8080",
 		WithToken("your-auth-token"),
 		WithTimeout(30*time.Second),
+		WithTenantID(tenantID), // default tenant for all requests from this client
 	)
 
+	// Per-request tenant override example:
+	// You can override the tenant for a single request by setting the "TenantID" value in the context.
+	// e.g. ctx := context.WithValue(context.Background(), "TenantID", &tenantID)
+	// then pass `ctx` to any client method to use tenant 2 for that request only.
+
 	// 1. Create a knowledge base
 	fmt.Println("1. Creating knowledge base...")
 	kb := &KnowledgeBase{