fix: set Content-Type headers for requests with payload (#7)

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "reflect-client",
-	"version": "1.1.0",
+	"version": "1.1.2",
 	"main": "build/Reflect.js",
 	"type": "module",
 	"exports": {

src/Reflect.ts

@@ -9,7 +9,8 @@ export default class Client {
 	private headers: object = {};
 
 	constructor(url: string, key: string|null = null) {
-		this.url = url;
+		// Append tailing slash if omitted from URL string
+		this.url = url.substring(url.length - 1) === "/" ? url : url + "/";
 
 		// Use API key with requests if defined
 		if (key) {
@@ -17,13 +18,21 @@ export default class Client {
 		}
 	}
 
+	// Set request header
+	private setHeader(name, value): void {
+		return this.headers[name] = value;
+	}
+
 	// Set API key to use for all requests
 	private setApiKey(key: string): void {
-		this.headers["Authorization"] = `Bearer ${key}`;
+		return this.setHeader("Authorization", `Bearer ${key}`);
 	}
 
 	// Get fully qualified URL to endpoint
 	private getEndpoint(endpoint: string): string {
+		// Remove leading slash if provided for pathname. It's already set on the domain name
+		endpoint = endpoint.substring(0, 1) !== "/" ? endpoint : endpoint.substring(1, endpoint.length);
+		
 		return this.url + endpoint;
 	}
 
@@ -34,8 +43,9 @@ export default class Client {
 			headers: this.headers
 		}
 
-		// JSON stringify and append body to request if provided
+		// JSON stringify and append body to request if provided and is not a GET request
-		if (payload) {
+		if (payload && method !== Method.GET) {
+			this.setHeader("Content-Type", "application/json");
 			options["body"] = JSON.stringify(payload);
 		}