add .npmignore, genJsonProfile return string instead of object.

.npmignore

diff --git a/.npmignore b/.npmignore
new file mode 100644
index 0000000..5a808ed
--- /dev/null
+++ b/.npmignore
@@ -0,0 +1,11 @@
+# dependencies
+node_modules/
+
+# Src and test suites
+src/
+
+.idea/
+package-lock.json
+yarn.lock
+
+npm-debug.log
\ No newline at end of file

package.json

diff --git a/package.json b/package.json
index b755892..f873a25 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "casbinjs-server-tool",
-  "version": "0.0.1",
+  "version": "0.0.3",
   "description": "This package provides the facilities to generate permission tokens on node-casbin service.",
   "main": "./lib/index.js",
   "typings": "./lib/index.d.ts",

src/CasbinJsServerTool.ts

diff --git a/src/CasbinJsServerTool.ts b/src/CasbinJsServerTool.ts
index 0eea018..f92f515 100644
--- a/src/CasbinJsServerTool.ts
+++ b/src/CasbinJsServerTool.ts
@@ -64,13 +64,13 @@
         "ps": "p,a,b,c\np,a,c,b\n..."
     }
     */
-    async genJsonProfile(subject: string): Promise<Object> {
+    async genJsonProfile(subject: string): Promise<string> {
         const jsonProfile: Record<string, string> = {};
         jsonProfile["r"] = utils.getRawRequestString(this.enforcer);
         jsonProfile["p"] = utils.getRawPolicyString(this.enforcer);
         jsonProfile["e"] = utils.getRawEffectString(this.enforcer);
         jsonProfile["m"] = await this.genMatcher();
         jsonProfile["ps"] = await this.genPolicies(subject);
-        return Object(jsonProfile);
+        return JSON.stringify(jsonProfile);
     }
 }

src/__test__/index.test.ts

diff --git a/src/__test__/index.test.ts b/src/__test__/index.test.ts
index e3fec2b..caa9312 100644
--- a/src/__test__/index.test.ts
+++ b/src/__test__/index.test.ts
@@ -7,7 +7,8 @@
     const e = await newEnforcer(`${examplesPath}/basic_model.conf`, `${examplesPath}/basic_policy.csv`);
     const svrTool = new CasbinJsServerTool(e);
 
-    const profile = await svrTool.genJsonProfile("alice");
+    const profileStr = await svrTool.genJsonProfile("alice");
+    const profile = JSON.parse(profileStr);
     expect(profile.hasOwnProperty("ps")).toBe(true);
 
     const policies = profile["ps"].split("\n");
@@ -24,7 +25,8 @@
     const e = await newEnforcer(`${examplesPath}/rbac_model.conf`, `${examplesPath}/rbac_policy.csv`);
     const svrTool = new CasbinJsServerTool(e);
 
-    const profile = await svrTool.genJsonProfile("alice");
+    const profileStr = await svrTool.genJsonProfile("alice");
+    const profile = JSON.parse(profileStr);
     const policies = profile["ps"].split("\n");
     expect(profile.hasOwnProperty("ps")).toBe(true);
     expect(policies.length).toBe(3);
@@ -36,5 +38,5 @@
     const conf = profile["m"];
     expect(conf).toBe("m = r_obj == p_obj && r_act == p_act");
 
-    console.log(await svrTool.genJsonProfile("alice"));
+    console.log(profile);
 });