Add innner headers (aliyun#236)

* add inner headers

* add inner headers

* add inner headers

Author: EvanLjp

client.go

@@ -113,7 +113,7 @@ type Client struct {
 	// When conflict with sdk pre-defined headers, the value will
 	// be ignored
 	CommonHeaders map[string]string
-	KeyProvider   string
+	InnerHeaders  map[string]string
 }
 
 func convert(c *Client, projName string) *LogProject {
@@ -135,7 +135,7 @@ func convertLocked(c *Client, projName string) *LogProject {
 	p.AuthVersion = c.AuthVersion
 	p.Region = c.Region
 	p.CommonHeaders = c.CommonHeaders
-	p.KeyProvider = c.KeyProvider
+	p.InnerHeaders = c.InnerHeaders
 	if c.HTTPClient != nil {
 		p.httpClient = c.HTTPClient
 	}

client_request.go

@@ -77,8 +77,8 @@ func (c *Client) request(project, method, uri string, headers map[string]string,
 			return nil, fmt.Errorf("Can't find 'Content-Type' header")
 		}
 	}
-	if c.KeyProvider != "" && c.AuthVersion != AuthV4 {
-		headers["x-log-keyprovider"] = c.KeyProvider
+	for k, v := range c.InnerHeaders {
+		headers[k] = v
 	}
 	var signer Signer
 	if authVersion == AuthV4 {

log_project.go

@@ -62,7 +62,7 @@ type LogProject struct {
 	// When conflict with sdk pre-defined headers, the value will
 	// be ignored
 	CommonHeaders map[string]string
-	KeyProvider   string
+	InnerHeaders  map[string]string
 }
 
 // NewLogProject creates a new SLS project.

request.go

@@ -178,8 +178,8 @@ func realRequest(ctx context.Context, project *LogProject, method, uri string, h
 		}
 	}
 
-	if project.KeyProvider != "" && project.AuthVersion != AuthV4 {
-		headers["x-log-keyprovider"] = project.KeyProvider
+	for k, v := range project.InnerHeaders {
+		headers[k] = v
 	}
 	var signer Signer
 	if project.AuthVersion == AuthV4 {