Sakurai/pdf.js
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Handles HTTP redirects

Browse Source
This commit is contained in:
Yury Delendik 2014-03-25 12:24:46 -05:00
parent 0fe0bb12d4
commit 1e1667c592
1 changed files with 25 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
test/downloadutils.js
View File

@ -24,10 +24,27 @@ var crypto = require('crypto');
var http = require('http');
var https = require('https');
function downloadFile(file, url, callback) {
function downloadFile(file, url, callback, redirects) {
var completed = false;
var protocol = /^https:\/\//.test(url) ? https : http;
protocol.get(url, function (response) {
if (response.statusCode === 301 || response.statusCode === 302 ||
response.statusCode === 307 || response.statusCode === 308) {
if (redirects > 10) {
callback('Too many redirects');
}
var redirectTo = response.headers.location;
redirectTo = require('url').resolve(url, redirectTo);
downloadFile(file, redirectTo, callback, (redirects || 0) + 1);
return;
}
if (response.statusCode === 404 && url.indexOf('web.archive.org') < 0) {
// trying waybackmachine
var redirectTo = 'http://web.archive.org/web/' + url;
downloadFile(file, redirectTo, callback, (redirects || 0) + 1);
return;
}
if (response.statusCode !== 200) {
if (!completed) {
completed = true;
@ -52,6 +69,13 @@ function downloadFile(file, url, callback) {
});
}).on('error', function (err) {
if (!completed) {
if (typeof err === 'object' && err.errno === 'ENOTFOUND' &&
url.indexOf('web.archive.org') < 0) {
// trying waybackmachine
var redirectTo = 'http://web.archive.org/web/' + url;
downloadFile(file, redirectTo, callback, (redirects || 0) + 1);
return;
}
completed = true;
callback(err);
}