[fix] application/xml body can not get from ctx.request.body

[chuantianc]

Describe the bug

Node.js version:
v15.14.0
OS version:
macos monterey 12.5.1
Description:
I use the demo : https://github.com/koajs/koa-body#hello-world---quickstart to recive a application/xml request, but ctx.request.body is empty.

Actual behavior

Expected behavior

expected the same req content

Code to reproduce

req cmd:

curl --location --request POST 'http://127.0.0.1:3000' \
--header 'Content-Type: application/xml' \
--data-raw '<xml>
    <mch_id>123</mch_id>
    <nonce_str>adb</nonce_str>
    <sign>BIYTVI1123</sign>
</xml>'

server code(same as the example):

const Koa = require('koa');
const koaBody = require('koa-body');

const app = new Koa();

app.use(koaBody());
app.use(ctx => {
  ctx.body = `Request Body: ${JSON.stringify(ctx.request.body)}`;
});

app.listen(3000);

Checklist

• [ yes] I have searched through GitHub issues for similar issues.
• [ yes] I have completely read through the README and documentation.
• [ yes] I have tested my code with the latest version of Node.js and this package and confirmed it is still not working.

[LORD-KAY]

Have you tried setting the content type as Content-Type: text/xml instead ? @chuantianc

[chuantianc]

Content-Type: text/xml is OK. But I need to support Content-Type: application/xml calling @LORD-KAY

[HobaiRiku]

Same here, text/xml is fine, but need the very application/xml, don't have time to investigate it, so here is my solution :

const parseApplicationXmlToText = async (ctx, next) => {
  const contentType = ctx.get('content-type');
  if(contentType.includes('xml') && !ctx.request.body) {
    await new Promise((resolve, reject) => {
      const req = ctx.req;
      let xml = '';
      req.setEncoding('utf8');
      req.on('data', (chunk) => {
        xml += chunk;
      });
      req.on('end', () => {
        ctx.request.body = xml;
        resolve();
      });
      req.on('error', (err) => {
        reject(err);
      });
    })
  }
  await next()
}

and use it after use koaBody()