I want to try AppHarbor, but I have an application which stores uploaded files in certain place on a filesystem. Is it compatible with AppHarbor? Can I store files in the file system and access them later?
(what kind of path can I expect, like c:\blabla something or what?)
Thank you.
You can store files on the local filesystem, but the application directory is wiped on each new deployment so it's not recommended to rely on for file storage.
Instead we recommend that you use a cloud storage service such as Amazon S3, Google Cloud Storage or similar. There are .NET libraries for both services.
We recently wrote a blog post about uploading files directly to S3 and GCS from the browser that you might want to read.
If you are using a background worker, you need to 'Enable File System Write Access' in the settings of you application.
Then, you are permitted access to write to: Path.GetTempPath()
Sourced from this support question: http://support.appharbor.com/discussions/problems/5868-create-directory-in-background-worker
Related
I am using a rails 4 application on Bluemix, attaching files using paperclip gem. As we all know, Paperclip is saving a reference to that file in the actual db, saving the physical file into a /public location.
I am submitting a file to this db which is getting saved here
/home/vcap/app/public/files/submissions/files/140/original/Successful_Submission.pdf
and then the file retrieval is working perfectly fine. Once I restart my app, I get:
Errno::ENOENT (No such file or directory # rb_file_s_lstat - /home/vcap/app/public/files/submissions/files/140/original/Successful_Submission.pdf):
And this is because Bluemix is not persisting this information. How can I get hold of those files between app restarts?
Bluemix is built on top of Cloud Foundry and it has an ephemeral filesystem, i.e., once your application stops the platform will claim back that filesystem and creates a brand new one once you restart your application.
Writing to the local filesystem is not recommended for cloud applications and you may need to redesign your application to work with Bluemix. One solution is to save your files in your database and not only the reference.
You can find more details on this link.
Each application instance on Bluemix (which is based on Cloud Foundry) has ephemeral storage. This storage is only available for the lifetime of that particular instance. When you redeploy your app then you'll get a new app instance and any data on the previous app instance will be inaccessible.
There's a good explanation of why it's best to avoid writing to the local file system when designing an application for Bluemix / Cloud Foundry.
You may want to take a look at a gem like CarrierWave to store the files on Amazon S3 or another persistent store. There's also Paperclip which offers similar functionality.
I had uploaded files mostly media files to Azure's File Storage, which I am able to see in Azure's Explorer as well. But when I view the file as anonymous user, I am not able to view the file. Tried to check with Permissions setting as well, but to no avail.
Any help would be welcomed :)
Azure files have Shared Access Signatures (SAS). This is a key that you compute with the storage account key, that gives access to a particular URL. Here is an example (storage account name is obfuscated here):
https://mystorageaccount.file.core.windows.net/sampleshare/2.png?sv=2015-04-05&sr=f&si=sampleread&sig=Zq%2BfflhhbAU4CkCuz9q%2BnUFEM%2Fsg2PbXe3L4MeCC9Bo%3D&sip=0.0.0.0-255.255.255.255
You have sample code on how to create a SAS with Azure files at https://azure.microsoft.com/en-us/documentation/articles/storage-dotnet-how-to-use-files/, ยง"Generate a shared access signature for a file or file share".
You can also do it interactively with a number of tools. For instance, CloudXPlorer has this feature.
I want to cache some cropped images and serve them without calculating them again in a Azure WebSite. When I used the Azure VM I was just storing them at the D drive (temporary drive) but I don't know where to store them now.
I could use the Path.GetTempPath but I am not sure if this is the best approach.
Can you suggest me where should I store my Temporary files when I am serving from a Azure WebSite?
Azure Websites also comes with a Temp folder. The path is defined in the environment variable %TEMP%
You can store your images in App_Data folder in the root of your application or you can use Azure CDN for caching.
You could store the processed content on Azure Blob Storage and serve the content from there.
If what you really want is a cache you can also look into using the Azure Redis Cache.
you can use Path.GetTempPath() and Path.GetTempFileName() functions for the temp file name, but you are limited though in terms of space, so if you're doing a 10K save for every request and expect 100,000 requests at a time per server, maybe blob storage is better.
Following sample demonstrate how to save temp file in azure, both Path and Bolb.
Doc is here:https://code.msdn.microsoft.com/How-to-store-temp-files-in-d33bbb10
Code click here:https://github.com/Azure-Samples/storage-blob-dotnet-store-temp-files/archive/master.zip
I am a bit stuck with this Windows Azure Blob storage.
I have a controller that receive a file path (local).
So on the web page I do something loke this:
http:...?filepath=C:/temp/myfile.txt
On the web service I want to get this file and put it on the blob service. When I launch it in local there is no problem but when i publish it there is no way to get the file. I always get:
Error encountered: Could not find a part of the path 'C:/temp/myfile.txt'.
Can someone help me. Is there a solution ?
First i would say to get proper help you would need to provide better description about your problem. What do you mean by "On the web service"? Is it a WCF web role which seems to match with your partial problem description. However most of the web service use http://whatever.cloudapp.net/whatever.svc as well as http://whatever.cloudapp.net/whaterever.aspx?whatever if added. Have you done something like that in your application.
You have also mentioned the controller in your code which makes me think it is a MVC based Web Role application.
I am writing above information to help you to formulate your question much better next time.
Finally Based on what you have provided you are reading a file from local file system (C:\temp\myfile.txt) and uploading to Azure Blob. This will work in compute Emulator and sure will fail in Windows Azure because:
In your Web Role code you will not have access to write on C:\ drive and that's why file is not there and you get error. Your best bet is to use Azure Local Storage to write any content there and then use Local Storage to read the file and then upload the Azure Blob. Azure Local storage is designed to write any content from web role (you will have write permission).
Finally, I am concern with your application design also because Azure VM are no persisted so having a solution to write to anywhere in VM is not good and you may need to directly write to Azure storage without using system memory, if that is possible anyways.
Did you verify the file exists on the Azure server?
I have an app in Heroku, I need simple file storage for uploaded images for this I
used send_data using attachment_fu plugin.
After that I have used the tmp/ directory to write this file and want to display on browser, But these files are not displayed in browser.
How can I display these images on browser?
What is the alternate solution to store and retrieve images?
Thanks!
You cannot store uploaded files on Heroku.
You must use an alternative strategy. A couple alternative strategies:
Store uploaded files in your database on Heroku. Because database systems are not specifically optimized for storing files, you should test out how well your application performs under load before you use this strategy.
Store uploaded files in an external storage service. Amazon S3 is a popular cloud storage service that anyone can use, and it has pay-as-you-go pricing just like Heroku. (In fact, Heroku itself runs on top of another of Amazon's cloud services, EC2.)