I'm attempting to make a public shinyapps.io website, and I'm trying to use image_write to create a file into a local directory.
The following code works on my local R studio code:
image_write(im.resized, path = paste0(output_file_directory, file_name), format = "jpg")
When I run the code on the shinyapps.io website, the code runs without error, but I'm not sure where it downloads the file to. I know that the output_file_directory part isn't the issue, so I'm a little lost. Any help would be much appreciated!
On shinyapps.io it is not possibly to store permanently data, due to:
"Shinyapps.io is a popular server for hosting Shiny apps. It is designed to distribute your Shiny app across different servers, which means that if a file is saved during one session on some server, then loading the app again later will probably direct you to a different server where the previously saved file doesn’t exist."
See here:
https://shiny.rstudio.com/articles/persistent-data-storage.html
Related
[Sorry, newbie here!]
I've just installed R server, shiny server on an ubuntu EC2 instance. I have left the shiny-server.conf intact, except that I added: preserve_logs true;. The sample app was working fine.
I have removed /srv/shiny-server/index.html and /srv/shiny-server/sample-apps.
I have linked my app files from my /home/myapp directory to /srv/shiny-server/myapp. The app files consists of a single apps.R, a footer.html, and a small dataset .Rds, and a www/style.css file.
When I navigate to http://[myip]:3838/ the only thing is the directory listing; the only folder is : myapp. When I click to http://[myip]:3838/myapp/ , I see the directory listing as well. That is, I see the content, and I can download each of them. BUt I see no evidence of the app running. If I click on apps.R, my browser downloads the file.
PS: the app works fine when tested in Rstudio, or deployed on Shinyapps.io
If anyone from the future reads this, I wish you heard the loud headslap when I realized my app single-file should be called app.R, not apps.R (which makes a lot of sense in retrospect).
Hi guys i have made a shinyApp for a client using R.
The client for whom I’m working is asking for a shinyapp that works offline preferably in the form of an application or shiny window (as the online link of shinyapp.io will put load on the server). He wants to get the shiny output without seeing the R code.
He will later handover the shinyApp to his employees (>200) and they will mostly use the offline shinyApp on their desktop (in shiny window). Furthermore the data is very confidential so the client doesn't want his employees to either get csv data or publish the app online or see R code. Because every time they would run the app, they require csv data or codes to generate output.
That's why he doesn’t want a publish button anywhere in the app so that his employees doesn’t publish the app online.
Is there any way to do so? Any suggestions would be much appreciated
Method 1
I feel this is the best way to do it. This will give you an exe setup to install on your clients' server If you find it complicated you can try the below method, but my first preference would be this one.
Method 2
The process of making your standalone app is best explained here.
You can also use this site. If you feel the first is a little ambiguous
It is very much possible, and I do it often. If you have any doubts, you can ask me. This will not show the code to your client, it will be like any other desktop/server app, although the code can be seen if the app is probed, unlike the first method.
You can put the packaged app in a server which serves the local IPs.
I think you can do it without any hassle. Just follow the instructions line by line.
Regards/Revanth Nemani
I have a shinyapps.io application running fine, referencing a number of google sheets (by using publish->csv). This means that I can read.csv(url) those https://... urls both locally and in my shiny app. That's excellent.
However, one of my data partners offered up a csv file at their own https location, and that time the application failed with
"ERROR: cannot open the connection to
'https://www.ncdetect.com/PublicDownload/OverdoseReport.csv'"
I've seem a handful of seemingly related questions elsewhere, though none ended up being helpful.
The (public data) file I can read.csv() with in a shiny app is here, even though it's downloadable and my local instance can handle it just fine: https://www.ncdetect.com/PublicDownload/OverdoseReport.csv .
I am trying to deploy a Shiny app on shinyapps, but it is not possible to read and write local files from the computer of the user. The idea is that every user can upload some datasets and images given a local path where this input is stored, not to have a same series of inputs for everyone stored in a ´Data´ folder.
I know there are other options to deploy shiny apps (amazon, shiny server), but I am afraid I will find the same kind of problems. Before losing too much time trying other approaches, I would like to know if there is any way to deploy a shiny app that can read these inputs given a local path and, if not, if there is an easy way to prepare an online app that can do this trasnlating from a shiny-based one. If not, I guess I will have to leave my app as a normal R package.
Thank you in advance.
I have successfully developed a Shiny Application for sentiment analysis. When I deployed the application, it was not working. After going through the code I found that my code is referring to the files(emotions.csv.gz,subjectivity.csv.gz) which are located in my system. That could be the reason why the application is not working because on server its not able to find these particular files. Is there be any method to read these files directly from the url where they are present, so that there will be no system dependencies?