sharing file

receiver.js

const Ipfs = require('ipfs')
const node = new Ipfs() // you can specify a config
const requestData = {peerId : "QMA65465487ET6849" , cid : "QMA687979465167TY8798"} // data send by rest api

node.start(()=>{
  node.on('ready', ()=>{
    ipfs.swarm.peers((err, peers)=>{
       let peer = peers.filter((p) => {return p.id === requestData.peerId })[0];
       if(peer){
         node.files.get(requestData.cid, (err, data) =>{
           console.log(data);
         });
       }else{
          console.log('Not exist')
          process.exit(1);
       }
    });
  });
});

sender.js

const Ipfs = require('ipfs')
const node = new Ipfs() // you can specify a config
const request = require('request')
const fs = require('fs')
const yourFilePath = "/your_path/test.txt"

node.start(()=>{
  node.on('ready', ()=>{
     let fileBuffer = fs.readfile(yourFilePath, "utf8" (err, data) => {
        node.files.add({path : yourFilePath, content : fileBuffer}, (err, hash)=>{
          let finalHash = hash.filter((h)=> {return '/' + h.path === yourFilePath});
          node.id((identity)=>{
            request.post({
              url : 'your_app_host/share',
              json : true,
              form: {peerId : identity.ID, cid : finalHash}
            }, ()=>{
              console.log('send ' + finalHash + ' peerId' + identity.ID);
            })
          });
        });
     });
  });
});