在Axios中增加maxContentLength和maxBodyLength

问题描述

我正在使用"Axios"来调用WCF方法，该方法将参数文件信息和内容作为参数.读取文件并将其作为base64编码的字符串发送.我的问题是，当文件大小超过某个限制时，AXIOS会引发异常:错误:请求正文大于maxBodyLength限制".我查了一下问题，发现所有解决方案都建议增加AXIOS配置对象中的maxContentLength/maxBodyLength参数，但没有成功.在node.js中的以下已实现的测试用例中查找:

I am using "Axios" to call a WCF method that takes as parameter file information and content. The file is read and sent as a base64 encoded string.My issue is that when the file size exceeds a certain limit, AXIOS throws an exception: "Error: Request body larger than maxBodyLength limit".I looked up the issue and found that all solutions suggest increasing the maxContentLength / maxBodyLength parameters in the AXIOS configuration object, but did not succeed.Find Below an implemented test case in node.js:

    var axios = require('axios');
    var fs = require('fs');
    var path = require('path')
    enter code here`var util = require('util')
    let readfile = util.promisify(fs.readFile)

    async function sendData(url,data) {
        let params = data

        let resp = await axios({
            method: 'post',
            url: url,
            data: JSON.stringify(params),
            headers: { 'Accept': 'application/json', 'Content-Type': 'application/json' }
            // maxContentLength: 100000000,
            // maxBodyLength: 1000000000
        }).catch(err => {
            throw err;
        })
        return resp;
      }
    async function ReadFile(filepath) {
        try{

            let res = await readfile(filepath,'base64')
            let filename = path.basename(filepath).split('.').slice(0, -1).join('.')
            let ext = path.extname(filepath)

            return {data:res,fext:ext,fname:filename}
            let x = 1
        }
        catch(err)
        {
            throw err
        }

    }
    (async () => {
        try {

            let img = await ReadFile('Files/1.pdf')
            let res = await sendData('http://183.183.183.242/EMREngineEA/EMRWS.svc/web/EMR_TestUploadImg',img)
            console.log(res)

        }
        catch (ex) {
            console.log(ex)
        }
    }
    )();

就我而言，pdf文件为20 MB，运行时会引发错误.错误:请求正文大于maxBodyLength限制"

In my case, the pdf file is 20 MB, upon running, an error is thrown."Error: Request body larger than maxBodyLength limit"

我尝试设置maxContentLength:100000000，maxBodyLength:1000000000如上所述，但没有成功.

I tried to setting the maxContentLength: 100000000, maxBodyLength: 1000000000as presented above, but did not succeed.

我们非常感谢您的帮助.

Your help is appreciated.

推荐答案

在此简单测试中，maxBodyLength似乎对我有用，我将数据上传到本地Express服务器.如果我尝试上传的内容超过了maxBodyLength，则会收到与您相同的错误消息.因此，我怀疑还有更多事情，例如发生在您的情况下的重定向会触发错误.

The maxBodyLength seems to work for me in this simple test, I upload data to a local Express server. If I try to upload more than the maxBodyLength I get the same error you're getting. So I suspect there's something more, like a redirect happening in your case that's triggering the error.

在此处处记录了axios出现的问题，该问题似乎与该问题有关，建议将maxContentLength设置为Infinity(如其他评论者所建议的那样).

There is an issue logged for axios here that seems to reference the problem, it suggests setting maxContentLength to Infinity (as the other commenter suggests).

例如

maxContentLength: Infinity,
maxBodyLength: Infinity

下面的测试代码:

const axios = require("axios");

function generateRandomData(size) {
    const a = Array.from({length: size}, (v, k) => Math.floor(Math.random()*100)); 
    return { data: a, id: 1 };
}

async function uploadData(url, size) {
    let params = generateRandomData(size);
    let stringData = JSON.stringify(params);
    console.log(`uploadData: Uploading ${stringData.length} byte(s)..`);
    let resp = await axios({
        method: 'post',
        url: url,
        data: stringData,
        headers: { 'Accept': 'application/json', 'Content-Type': 'application/json' },
        maxContentLength: 100000000,
        maxBodyLength: 1000000000
    }).catch(err => {
        throw err;
    })
    console.log("uploadData: response:", resp.data);
    return resp;
}

uploadData("http://localhost:8080/upload", 10000000);

对应的服务器代码:

const express = require("express");
const port = 8080;
const app = express();
const bodyParser = require('body-parser')

app.use(bodyParser.json({limit: '50mb'}));

app.post('/upload', (req, res, next) => {
    console.log("/upload: Received data: body length: ", req.headers['content-length']);
    res.json( { status: 'ok', bytesReceived: req.headers['content-length']});
})

app.listen(port);
console.log(`Serving at http://localhost:${port}`);

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