Scripts for Azure mobile services

As a newcomer to server scripts, I am facing an issue that I believe has a simple solution, although I have been unable to find the answer so far. My current setup involves using azure mobile services for retrieving and inputting user information, with a focus on preventing users from accessing each other's ID numbers.

In order to retrieve data, the program sends the following HTTP request:

"GET http://Servicename.net/tables/TableName?$top=1&$orderby=__createdAt%20desc&$filter=id+eq+'"+id+"' HTTP/1.1"

The 'id' parameter is based on the user account currently logged in. However, it is essential to prevent users from tampering with the request to view all IDs by sending a query like this:

 "GET http://Servicename.net/tables/TableName HTTP/1.1"

To address this issue, my goal is to utilize server-side scripts, specifically focusing on the read operation script, to verify that each request contains a valid ID and only return data associated with that particular ID.

I have attempted the following code snippet:

function read(query, user, request) {
 if(request.parameter.id != null){
request.execute();
    }
}

However, this approach has not yielded the desired results. Therefore, my question pertains to how I can extract the ID number from the HTTP request and incorporate it effectively within the script. Your assistance in clarifying this matter would be greatly appreciated!

javascriptazureazure-mobile-services

Answer №1

If you're interested, I have a comprehensive series about Azure Mobile Apps that you may find helpful:

You should pay specific attention to Day 6 - Personal Tables. This section demonstrates how to limit the data returned to a user based on their authenticated user ID.

Answer №2

To extract the user id from the table operations in Mobile Service, utilize the second argument user, which consistently holds a user object representing the requester.

A helpful code snippet illustrating the usage can be found at :

function insert(item, user, request) {
    if (item.userId !== user.userId) {
        request.respond(statusCodes.FORBIDDEN, 
        'You may only insert records with your userId.');
    } else {
        request.execute();
    }
}

For further details on working with Mobile Services in Node.js, please consult Work with a JavaScript backend mobile service.

Furthermore, it is now recommended to switch to Mobile Apps instead of Mobile Services. To learn more, refer to .

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