如何从hapi.js路由处理程序外部进行回复 [英] How to reply from outside of the hapi.js route handler

问题描述

我有一条 hapi.js 路由，我想推迟响应.我试过存储reply函数，以后再调用它，或将其包装在Promise中，但是hapi总是立即以500 Internal Server Error响应进行响应.

I have a hapi.js route where I want to defer the response. I've tried storing the reply function and calling it later, or wrapping it in a promise, but hapi always responds immediately with a 500 Internal Server Error response.

存储答复以供以后使用:

Store the reply for later:

var pendingReplies = {};
server.route({
    method: "POST",
    path: "/",
    handler: function (request, reply) {
        var id = generateId();
        pendingReplies[id] = reply;
    }
});
... // reply later by calling:
function sendResponse(id, data) {
    pendingReplies[id](data);
}

我尝试创建一个答覆的承诺:

I've tried creating a promise to reply:

handler: function (request, reply) {
    var id = generateId();
    return new Promise(function (resolve, reject) {
        pendingReplies[id] = resolve;
    }).then(function (data) {
        return reply(data);
    });
}

我尝试使用 reply().hold()

I've tried using reply().hold()

handler: function (request, reply) {
    var id = generateId();
    var response = reply().hold();
    pendingReplies[id] = function (data) {
        response.source = data;
        response.send();
    };
    return response;
}

我尝试将reply().hold()与Promise结合使用:

I've tried using reply().hold() with a Promise:

handler: function (request, reply) {
    var id = generateId();
    var response = reply().hold();
    return new Promise(function (resolve, reject) {
        pendingReplies[id] = resolve;
    }).then(function (data) {
        response.source = data;
        response.send();
        return response;
    });
}

使用这些命令中的每一个，一旦处理程序函数退出，我就会在节点控制台中得到500响应和以下输出:

With each of these, as soon as the handler function exits, I get a 500 response and the following output in the node console:

Debug: internal, implementation, error
    Error: Uncaught error: socket hang up
    at createHangUpError (_http_client.js:198:15)
    at Socket.socketOnEnd (_http_client.js:283:23)
    at emitNone (events.js:72:20)
    at Socket.emit (events.js:163:7)
    at _stream_readable.js:891:16
    at process._tickDomainCallback (node.js:388:13)

hapi是否可以从路由处理程序外部异步回复请求?

Is it possible with hapi to reply to a request asynchronously from outside of the route handler?

推荐答案

如果处理程序中引发错误，则hapi.js将立即退出并提供500状态代码.检查generateId()是否有效.

If an error is thrown within your handler, hapi.js will immediately exit and give a 500 status code. Check if generateId() is a valid function.

您的其余代码对您的第三个和第四个示例都是正确的. reply().hold()对于在handler返回后保持连接打开是必需的.

The rest of your code looks right for your third and fourth examples. reply().hold() is necessary to keep the connection open after handler returns.

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