node.js 参考错误：请求未定义
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ReferenceError: request is not defined
提问by Sylar
Im trying to replicate a facebook messenger botbut keep getting request is not defined.
我试图复制一个facebook Messenger bot，但不断得到request is not defined.
Same code as facebook:
与facebook相同的代码：
function callSendAPI(messageData) {
request({
uri: 'https://graph.facebook.com/v2.6/me/messages',
qs: { access_token: PAGE_ACCESS_TOKEN },
method: 'POST',
json: messageData
}, function (error, response, body) {
if (!error && response.statusCode == 200) {
var recipientId = body.recipient_id;
var messageId = body.message_id;
console.log("Successfully sent generic message with id %s to recipient %s",
messageId, recipientId);
} else {
console.error("Unable to send message.");
console.error(response);
console.error(error);
}
});
}
My node server.jslooks like this:
我的节点server.js如下所示：
const express = require('express');
const bodyParser = require('body-parser');
//const request = express.request;
const PAGE_ACCESS_TOKEN = 'abc';
let app = express();
app.use(bodyParser.urlencoded({ extended: false }));
// parse application/json
app.use(bodyParser.json());
[...]
function sendTextMessage(recipientId, messageText) {
var messageData = {
recipient: {
id: recipientId
},
message: {
text: messageText
}
};
callSendAPI(messageData);
}
function callSendAPI(messageData) {..}
[...]
Am I missing something with express? Thanks
我在快递中遗漏了什么吗？谢谢
采纳答案by hlfrmn
This example is making use of third-party Request module.
这个例子使用了第三方请求模块。
You could also use the native requestlike so: require('http').request(), if you want to, but I would say, that the requestmodule is very common, and a good tool to use.
您也可以像这样使用本机请求：require('http').request()，如果您愿意，但我想说的是，请求模块非常常见，并且是一个很好的工具。
EDITActually, I just noticed that you have it in your code, but it's commented out!After taking a longer peek, your commented out requestis pointing to express.request, which, if used like request()will throw an error, since it's not a function. So, you should really use the Request module, or adjust the code to use native http.request.
编辑实际上，我只是注意到你的代码中有它，但它被注释掉了！看了更长时间后，您注释掉的request是指向express.request，如果使用 likerequest()会抛出错误，因为它不是函数。因此，您应该真正使用 Request 模块，或者调整代码以使用 native http.request。
回答by Ashwani Panwar
You have notinstalled requestmodule.
您还没有安装request模块。
First install it npm install --save requestand then includeit var request = require('request');
首先安装它npm install --save request，然后包含它var request = require('request');
