不和谐的Webhook速率限制

Question

我正在使用一个专用的浏览器扩展程序，该扩展程序从网页中提取一些信息并将其通过Webhook发布到Discord频道中。

浏览器扩展确实评估x-ratelimit-...响应标头以遵守速率限制限制。

在进行“垃圾邮件测试”时，似乎正确地遵守了速率限制限制，到目前为止一切正常。但是，即使ratelimit-remaining大于0，在发送一堆消息（15+）之后，我仍然时不时地受到速率的限制。

为了解决这个问题，我已经在ratelimit-remaining为1时停止了，并且还为ratelimit-reset时间戳添加了额外的秒数。但这似乎无济于事。

let rateLimitRemaining = 5;
let rateLimitReset = 0;

function sendContent()
{
    if ( contentQueue.length > 0 )
    {
        console.log( "Messages in content queue: " + contentQueue.length );

        let content = contentQueue[ 0 ];
        let dateTimestamp = getCurrentUTCTimestamp();

        // Don't send if remaining rate limit is <= 1 and current UTC time is less than reset timestamp
        if ( rateLimitRemaining <= 1 && dateTimestamp <= rateLimitReset )
            return;

        contentQueue.shift();

        let url = "...";
        sendMessage( content, url );
    }
}

function sendMessage( content, url )
{
    let payload = JSON.stringify( { "content": content } );
    $.ajax(
    {
        contentType: 'application/json',
        method: "POST",
        url: url,
        data: payload,
        dataType: 'json'
    } ).done( function( response, status, jqXHR )
    {
        rateLimitRemaining = parseInt( jqXHR.getResponseHeader( 'x-ratelimit-remaining' ) );
        // Add an additional second to the reset timestamp
        rateLimitReset = parseInt( jqXHR.getResponseHeader( 'x-ratelimit-reset' ) ) + 1;

        let timeToResetRemaining = rateLimitReset - getCurrentUTCTimestamp();
        console.log( '[' + getCurrentDateTime() + '] Content sent to webhook. Remaining until rate limit: ' + rateLimitRemaining + ' / Reset @ ' + rateLimitReset + ' (' + getCurrentUTCTimestamp() + ') (' + timeToResetRemaining + ')' );
    } ).fail( function( jqXHR, status, error )
    {
        let response = jqXHR.responseJSON;

        // If we got rate limited, respect the retry_after delay
        if ( response.hasOwnProperty( 'message' ) && response.message.indexOf( 'rate limited' ) !== 0 )
        {
            rateLimitRemaining = 0;
            rateLimitReset = getCurrentUTCTimestamp() + Math.ceil( response.retry_after / 1000 ) + 1;
        }

        console.log( '[' + getCurrentDateTime() + '] Error sending request to webhook.' );
        console.log( response );
    } );
}

奇怪的是，触发速率限制的同一请求的x-ratelimit-remaining响应标头为> 0。

我在这里想念什么？我的错误在哪里？我还需要考虑x-ratelimit-bucket和x-ratelimit-reset-after吗？