如何在节点js上发出HTTP POST请求 [英] How to make an HTTP POST request on node js
本文介绍了如何在节点js上发出HTTP POST请求的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
以下是服务器:
const Bpmn = require('bpmn-engine');
const processXml = `
<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<process id="theProcess" isExecutable="true">
<startEvent id="start" />
<exclusiveGateway id="decision" />
<endEvent id="end1" />
<endEvent id="end2" />
<sequenceFlow id="flow1" sourceRef="start" targetRef="decision" />
<sequenceFlow id="flow2" sourceRef="decision" targetRef="end1">
<conditionExpression xsi:type="tFormalExpression"
language="JavaScript"><![CDATA[
this.variables.input <= 50
]]></conditionExpression>
</sequenceFlow>
<sequenceFlow id="flow3" sourceRef="decision" targetRef="end2">
<conditionExpression xsi:type="tFormalExpression"
language="JavaScript"><![CDATA[
this.variables.input > 50
]]></conditionExpression>
</sequenceFlow>
</process>
</definitions>`;
const engine = new Bpmn.Engine({
name: 'exclusive gateway example',
source: processXml
});
engine.once('end', (definition) => {
if (definition.getChildActivityById('end1').taken) throw new Error('<end1>
was not supposed to be taken, check your input');
console.log('TAKEN end2', definition.getChildActivityById('end2').taken);
});
function sendEvent(value){
engine.execute({
variables: {
input: value
}
}, (err, definition) => {
console.log('Bpmn definition definition started with id',
definition.getProcesses()[0].context.variables.input.value);
console.log('sent event' + value);
console.log(engine.getState())
});
}
i = 0;
//hello.js
module.exports = (req, res, next) => {
//res.header('X-Hello', 'World')
//console.log(req);
if(!i++){
sendEvent(52);
}
console.log(engine.getState())
next()
}
上面的服务器是使用该软件包创建的,添加了中间件
https://www.npmjs.com/package/json-server
函数sendEvent中的数字52就是一个例子。我必须从http帖子中获取此值。我怎样才能做到这一点?
The server above has been created using that package adding middlewares https://www.npmjs.com/package/json-server The number 52 in the function "sendEvent" is an example. I have to take this value from an http post. How can I do that?
推荐答案
使用请求库:
var request = require('request');
request.post(
'http://www.example.com',
{ json: { key: 'value' } },
function (error, response, body) {
console.log(body)
}
);
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