node.js - 获取 "first argument must be a string or Buffer"错误

Question

// call the packages
var express = require('express');
var app = express();
var bodyParser = require('body-parser');
var figlet = require('figlet');
var querystring = require('querystring');
var http = require('http');
var fs = require('fs');
var request = require('request');

// configure app to use bodyParser()
// this will let app get the data from a POST
app.use(bodyParser.urlencoded({
    extended: true
}));
app.use(bodyParser.text());

// set port
var port = process.env.PORT || 8082;

// get an instance of the express Router
var router = express.Router();


// middleware to use for all requests
router.use(function(req, res, next) {

    // do logging
    console.log('UnitGener router invoking');
    // go to the next routes and don't stop here
    next();
});

// test route to make sure everything is working (accessed at GET http://localhost:8082/api)
router.get('/status', function(req, res) {
    res.json({
        message: 'UnitGener is ready to work!'
    });
});


//noinspection JSUnresolvedFunction
router.route('/function')

    .post(function(req, res) {
        console.log(req.body);
        var formatted = req.body;


        request.post({
            headers: {
                'content-type': 'application/x-www-form-urlencoded'
            },
            url: 'http://localhost:5000/generate',
            body: formatted
        }, function(error, response, body) {
            console.log(body);
        });

    });

app.use('/api', router);
app.listen(port);
});

这是我使用给定配置创建 POST 路由的完整代码，然后我在 post 方法中调用另一个 post 路由。但我收到“抛出新类型错误(‘第一个参数必须是字符串或缓冲区’)”；这个错误。我做了一些谷歌查找，也做了一些更改，但没有一个有效，但仍然发现很难指出错误。我也将 body: formatted 更改为 body: formatted.toString() 但没有用。请给我一些建议来找出这个问题。这对我来说是一个巨大的帮助。

提前致谢

Answer 1

错误在请求调用中。要正确提交表单，请使用

    request.post({
        url: 'http://localhost:5000/generate',
        form: formatted
    }, function(error, response, body) {
        console.log(body);
    });

我鼓励您使用 npm 模块 request-promise-native: https://github.com/request/request-promise-native https://www.npmjs.com/package/request-promise

var rp = require('request-promise');

var options = {
    method: 'POST',
    uri: 'http://api.posttestserver.com/post',
    body: {
        some: 'payload'
    },
    json: true // Automatically stringifies the body to JSON 
};

rp(options)
    .then(function (parsedBody) {
        // POST succeeded... 
    })
    .catch(function (err) {
        // POST failed... 
    });