I am trying to get a document (pdf/docx/zip/..) from an API and save it with the file name received at content-disposition in response header. I have tried the below methods. But either the file is not saved with the actual file name or the file is saved with corrupted (0kb) file. I have been trying this for 2 days now. Could someone point out where this is going wrong ?
var calloptions = {
method: 'GET',
url: 'https://ip:port/address',
qs: { docId: 'something toffetch' },
headers:
{
'content-type': 'application/json',
authorization: postData.bcAccessToken
}
};
console.log("calloptions", calloptions);
var filepath = require('path').join(require('os').homedir(), 'Desktop');
var name = 123;
var myFile = [];
request(calloptions, function (error, response, body) {
if (error) throw new Error(error);
var chunks = [];
name = 456;
// var myFile ;
//original=;
console.log(response.headers["content-disposition"]);
if (response.headers["content-disposition"]) {
myFile.push(filepath + "\\" + response.headers["content-disposition"].split("=").pop());
console.log(myFile);
// console.log(myFile);
console.log("BEFORE WRITTING");
response.on('data', function (chunk) {
while (chunk = this.read()) {
chunks.push(chunk);
//chunk.pipe(fs.appendFile(filepath+"\\"+response.headers["content-disposition"].split("=").pop()));
}
// fs.appendFileSync(myFile, chunk);
// fs.appendFile(myFile, chunk, function (err) {
// if(err) throw err;
// console.log("DURING WRITTING");
// console.log("myFile :- ",myFile);
// });
//chunks.pipe(fs.appendFile(filepath+"\\"+response.headers["content-disposition"].split("=").pop()));
// console.log("writing completed to file");
});//.pipe(fs.createWriteStream(filepath+"\\"+response.headers["content-disposition"].split("=").pop()));
console.log("AFTER WRITTING");
}
}).on('end', () => {
console.log('There will be no more data.');
console.log("IN THE END - ");
console.log(name);
console.log(myFile);
});//.pipe(fs.createWriteStream(filepath+"\\"+name));
console.log("AFTER REQUEST");
I solved it by using async.waterfall as below. But a better way to solve this is always appreciated.
async.waterfall([
function (callback) {
request(calloptions, function (error, response, body) {
if (error) throw new Error(error);
console.log(response.headers["content-disposition"]);
if (response.headers["content-disposition"]) {
//var myFile2 = filepath + "\\" + response.headers["content-disposition"].split("=").pop();
var body = '';
response.on('data', function (chunk) {
body += chunk;
});
callback(null, response.headers["content-disposition"].split("=").pop());
}
}).pipe(fs.createWriteStream(filepath+"\\"+"Orig.pdf"));
},
function (res, callback) {
console.log("SECOND FUNCTION");
console.log(res);
fs.rename(filepath+"\\"+"Orig.pdf", filepath+"\\"+res, function (err) {
if (err) throw err;
console.log('renamed complete');
});
}
])