[Bug]: Query parameters are getting parsed

[chathuranga95]

Description

When a http service is created with ballerina, the query params accepted to the resource functions are getting parsed when they have delimiters.

Steps to Reproduce

Run the following code with ballerina 2201.5.5 and issue the same request. Observe that the service is logging the query param as the first item in the comma-separated string.

Expected behaviour: The ballerina service should accept the query params as they are.
Code

import ballerina/log;
import ballerina/http;

service / on new http:Listener(9091) {
    resource function get greeting(string q) returns string {
        log:printInfo(q);
        return "Hello, World!";
    }
}

Request

curl --location 'localhost:9091/greeting?q=1%2C2'

Log output

time = 2024-12-19T14:46:05.119+05:30 level = INFO module = chathurangas/multi_server_debugger message = "1"

Affected Version(s)

No response

OS, DB, other environment details and versions

No response

Related area

-> Standard Library

Related issue(s) (optional)

No response

Suggested label(s) (optional)

No response

Suggested assignee(s) (optional)

No response

[NipunaRanasinghe]

@chathuranga95 if this a customer related issue, could you please create an issue in the https://github.com/wso2-enterprise/internal-support-ballerina/ repo? That will help us to prioratize the issue

[TharmiganK]

Tested the same code in Ballerina version - 2201.5.5 and latest http package version - 2.8.9, and it is working as expected for the mentioned cURL request(note that the value is a encoded string of value 1,2):

$ curl --location 'localhost:9091/greeting?q=1%2C2'
Hello, World!

Receiving the following log:

$ bal run     
Compiling source
        tharmigan/test:0.1.0

Running executable

time = 2024-12-20T09:44:17.220+05:30 level = INFO module = tharmigan/test message = "1,2"

The values you get after binding to a Ballerina type is the decoded value, not the raw value. If you want the raw value you need to get it from request raw path.

import ballerina/log;
import ballerina/http;

service / on new http:Listener(9091) {
    resource function get greeting(string q, http:Request req) returns string {
        log:printInfo(req.rawPath); // /greeting?q=1%2C2
        log:printInfo(q);
        return "Hello, World!";
    }
}

[TharmiganK]

Closing this issue since it is not reproducible with the latest version