Error: ENOENT, no such file or directory '/tmp/screenshot_85be4ad4e95551dd3481a21275ffbe8c.png'

[vbauer]

It looks like we have a problem with file cache:

Sending image in response
Error: ENOENT, stat '/tmp/screenshot_85be4ad4e95551dd3481a21275ffbe8c.png'
{ [Error: ENOENT, no such file or directory '/tmp/screenshot_85be4ad4e95551dd3481a21275ffbe8c.png']
  errno: 34,
  code: 'ENOENT',
  path: '/tmp/screenshot_85be4ad4e95551dd3481a21275ffbe8c.png',
  syscall: 'unlink' }
Request for http://https://www.google.ru/url?sa=t,https://sites.google.com/?hl=ru - Rasterizing it

[thomastraum]

I am having the exact same problem, any pointers?

[vbauer]

Nope, I'm still waiting any news about it from author..

[gcrumb]

Got bitten by the same problem. Here's what I've found:

The problem originates in the phantomjs renderer, I think. If you manually call the render service with an URL that results in this error, you'll see:

curl -H "url: https://bogus.url" -H "filename: file.png" http://localhost:3001/
Error: Url returned status fail

But in spite of sending a failure message, the server doesn't return an error status (e.g. 500), so route/index.js doesn't trap this, and goes ahead and adds the filename to the collection. But when it tries to send the non-existent file, you see the above exception.

Here's a patch that will at least properly trap the error:

diff --git a/routes/index.js b/routes/index.js
index 4cc6d59..c992dd2 100644
--- a/routes/index.js
+++ b/routes/index.js
@@ -11,7 +11,7 @@ module.exports = function(app, useCors) {
   // routes
   app.get('/', function(req, res, next) {
     if (!req.param('url', false)) {
-      return res.redirect('/usage.html');
+      return res.redirect('usage.html');
     }
 
     var url = utils.url(req.param('url'));
@@ -75,7 +75,11 @@ module.exports = function(app, useCors) {
   }
 
   var callRasterizer = function(rasterizerOptions, callback) {
     request.get(rasterizerOptions, function(error, response, body) {
+                       if (body.match(/Error:/)){
+                               return callback(new Error(body));
+                       }
       if (error || response.statusCode != 200) {
         console.log('Error while requesting the rasterizer: %s', error.message);
         rasterizerService.restartService();
@@ -107,10 +111,14 @@ module.exports = function(app, useCors) {
       res.setHeader("Access-Control-Allow-Origin", "*");
       res.setHeader("Access-Control-Expose-Headers", "Content-Type");
     }
+               if (!fs.existsSync(imagePath)){
+                               console.log("File does not exist! ", imagePath);
+                               return;
+               }
     res.sendfile(imagePath, function(err) {
       fileCleanerService.addFile(imagePath);
       callback(err);
     });
   }
 

The proper thing to do, of course is to get the rendering service to return an appropriate HTTP response status.

[slorber]

I have the same problem here.

It seems it happens mostly for bad URLs, but also for HTTPS protocol (not always however).

For exemple I have some cases where only the HTTPS version fails:

OK: http://localhost:3000/?url=http://en.wikipedia.org/wiki/User_agent
KO: http://localhost:3000/?url=https://en.wikipedia.org/wiki/User_agent

OK: http://localhost:3000/?url=http://leverich.github.io/swiftislikescala/
KO: http://localhost:3000/?url=https://leverich.github.io/swiftislikescala/

Yes according to what I see, PhantomJS returns a status code 200 with body Error: Url returned status fail\n

Any solution?

[vbauer]

To solve this problem, I built my own lunar lander, with blackjack and hookers: https://github.com/vbauer/manet

[slorber]

@vbauer thanks, glad to know. I may switch to your service if I can't solve my problems with actual server.

For into those having problems with HTTPS I think this is because of this PhantomJS problem:
http://stackoverflow.com/questions/12021578/phantomjs-failing-to-open-https-site

[candu]

This was fixed for me by upgrading to phantomjs 2.1.1 - haven't investigated enough to know why. (I was previously on phantomjs 1.9.8; ran both times under node v6.7.0.)