Rest Assured: How do I return JSON response as a String? (Java)

Question

How will I return a JSON response as a String with my code?

Purpose : I want to call getAccessToken() after it has obtained the accessToken from a json response body and need to return it as a String to be used in other methods.

The response example I'm trying to obtain:

"accessToken" : "The ID I need from here"

Code:

private String apiAccessToken;

public JsonPath getAccessToken() {
    JsonPath jsonPath = given().header("X-API-KEY", Config.API_KEY).header("session", this.sessionID)
            .header("username", this.userNameId).queryParam("code", verifiedCode).log().all()
            .get(baseUri + basePath + "/vm1/verifyCode").then().log().all().extract().jsonPath();

    this.apiAccessToken = jsonPath.get("accessToken");
    return new JsonPath(apiAccessToken);
}

[ Added - Showing how I'm using solutions from comments below ]

Example of how I call this method

public static String getToken(String key) {
    String res = given()
            .header("X-API-KEY", Config.API_KEY)
            .header("session", this.SessionId)
            .header("username", this.UserName)
            .queryParam("code", verifiedCode)
            .log().all()
            .get(baseUri + basePath + "/vm1 /verifyCode")
            .then()
            .log().all()
            .extract().asString();

    JsonPath js = new JsonPath(res);
    return js.get(key).toString();
}

public static String getJsonPath(Response response, String key) {
    String complete = response.asString();
    JsonPath js = new JsonPath(complete);
    return js.get(key).toString();
}

@Test
    public void testAuthValidator() throws InterruptedException, IOException, GeneralSecurityException {
        String sentCode = GmailUtility.getVerificationCode(); // Uses GMAIL API service to to read and get code from email and sends to getAccessToken
        System.out.println(sentCode);
        String Token = getToken("accessToken"); // Validates verification code. Spits out response for accessToken
        System.out.println(validator);
        driver = initializeDriver(); // Invokes Chrome
        driver.get(env.API_Website); // Goes to api website
        AuthApi auth = new AuthApi(driver);
        auth.getAuthorizeButton().click(); // Clicks a text field on webpage
        auth.getValueField().sendKeys("Token " + Token); // Need to call extracted response for the accessToken from getAccessToken.

Answer 1

Just write a simple reusable method to extract values using JSONPath and call the method in your code, here's a sample

Reusable Method:

public static String getJsonPath(Response response, String key) {
    String complete = response.asString();
    JsonPath js = new JsonPath(complete);
    return js.get(key).toString();
}

Test:

public static void main(String[] args) {

    Response res = given().header("X-API-KEY", Config.API_KEY).header("session", this.sessionID)
            .header("username", this.userNameId).queryParam("code", verifiedCode).log().all()
            .get(baseUri + basePath + "/vm1/verifyCode").then().log().all().extract().response();
    String value = getJsonPath(res, "accessToken");
    
    System.out.println(value);
}

Update:

public static String getToken(String key) {
    String res = given().header("X-API-KEY", Config.API_KEY).header("session", this.SessionId)
            .header("username", this.UserName).queryParam("code", verifiedCode).log().all()
            .get(baseUri + basePath + "/vm1 /verifyCode").then().log().all().extract().asString();
    JsonPath js = new JsonPath(res);
    return js.get(key).toString();
}

@Test
public void testAuthValidator() throws InterruptedException, IOException, GeneralSecurityException {
    String sentCode = GmailUtility.getVerificationCode();
    System.out.println(sentCode);
    String Token = getToken("accessToken");
    System.out.println(Token);
    driver = initializeDriver();
    driver.get(env.API_Website);
    AuthApi auth = new AuthApi(driver);
    auth.getAuthorizeButton().click();
    auth.getValueField().sendKeys("Token " + Token);
}

You can get any value using this