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This commit is contained in:
Jonathan Cremin 2016-06-06 13:39:42 +01:00
parent a1a39778aa
commit 6ec5f456f3
12 changed files with 647 additions and 261 deletions
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55
lib/hostr-file-stream.js
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@ -1,35 +1,50 @@
import fs from 'fs';
import createError from 'http-errors';
import { get as getFile } from './sftp';
import { get as getSFTP } from './sftp';
import { get as getS3 } from './s3';
import debugname from 'debug';
const debug = debugname('hostr:file-stream');
export default function* hostrFileStream(localPath, remotePath) {
function writer(localPath, remoteRead) {
return new Promise((resolve, reject) => {
remoteRead.once('error', () => {
debug('remote error');
reject(createError(404));
});
const localWrite = fs.createWriteStream(localPath);
localWrite.once('finish', () => {
debug('local write end');
resolve(fs.createReadStream(localPath));
});
remoteRead.once('readable', () => {
debug('writing');
remoteRead.pipe(localWrite);
});
});
}
export default function hostrFileStream(localPath, remotePath) {
const localRead = fs.createReadStream(localPath);
return new Promise((resolve, reject) => {
localRead.once('error', () => {
debug('local error');
const remoteFile = getFile(remotePath);
remoteFile.then((remoteRead) => {
const localWrite = fs.createWriteStream(localPath);
localWrite.once('finish', () => {
debug('local write end');
resolve(fs.createReadStream(localPath));
debug('not found locally');
getSFTP(remotePath)
.then((remoteRead) => writer(localPath, remoteRead))
.then(resolve)
.catch((err) => {
debug('not on sftp', err);
writer(localPath, getS3(remotePath))
.then(resolve)
.catch((s3err) => {
debug('not on s3');
reject(s3err);
});
});
remoteRead.pipe(localWrite);
remoteRead.once('error', () => {
debug('remote error');
reject(createError(404));
});
});
});
localRead.once('readable', () => {
debug('local readable');
debug('found locally');
resolve(localRead);
});
});