在ballerina.io中为HTTP GET响应设置编码(ISO-8859-1 )

import ballerina/http;

http:Listener listener = new(http:Listener, 9090);

function handleGetRequest(http:Caller caller, http:Request request) {
    // 设置响应头部的Content-Type字段
    http:Response response = new;
    response.setHeader("Content-Type", "text/plain; charset=ISO-8859-1");
    
    // 设置响应内容
    response.setPayload("Hello, World!");
    
    // 发送响应
    var result = caller->respond(response);
    if (result is error) {
        // 处理发送响应失败的情况
        log:printError("Failed to send response: ", result);
    }
}

http:Service service = new;
service.get("/hello", handleGetRequest);

http:ListenerConfiguration config = {};
listener.start(service, config);