Failed to access .local-chromium

[LucasNmn]

Hi,

I'm trying to export an svg string in an ASP.NET WebApp with Plotly.Net vers 2.0 . It works fine on my local computer but when i try rolling it out on an IIS server i get "no permission on c:/path-to-file/.local-chromium" ). The issue might be a wrong installation of the chromium browser but I'm not quite sure. Maybe I have to set the executablepath for PuppeteerSharp but I don't know where to do this.

Do you have any idea how to fix this?

[kMutagene]

Since #264 got merged, i think you should be able to set the executable path via PuppeteerSharpRendererOptions.localBrowserExecutablePath :

Plotly.NET/src/Plotly.NET.ImageExport/PuppeteerSharpRenderer.fs

Lines 12 to 18 in b8f1d88

	module PuppeteerSharpRendererOptions =
	let mutable launchOptions = LaunchOptions()
	launchOptions.Timeout <- 60000
	let mutable localBrowserExecutablePath =
	None

Just set it to a path via mutable assignment (PuppeteerSharpRendererOptions.localBrowserExecutablePath <- Some "path/here")

[kMutagene]

On another note, it might be that your application simply does not have the permissions to access the content of .local-chromium. It has been some time since i used IIS, but there is a user (IIS_USRS or IUSR or something like that), which symbolizes the access rights of your IIS application. If your .local-chromium folder is persistent, adding full access for those users might do the trick.

[LucasNmn]

Thanks for your advice. I've updated from Version 2.0 prev 6 to Version 2.0. I'm now getting some strange behaviour. When I'm exporting an image to an svg string with chart.ToSVGString() the functions hangs up in an endless loop. When I'm generating an image with :

chart = GenericChart .ofTraceObject(true, trace) .WithLayout(layout) .WithConfig(config) .WithShapes(shapeList) .Show();,

It's exporting an image. I added the executable like:

Plotly.NET.ImageExport.PuppeteerSharpRendererOptions.localBrowserExecutablePath = "C:\\Program Files\\Google\\Chrome\\Application\\chrome.exe";

But with and without the behaviour isn't changing at all.

[kMutagene]

is this done from C#? If so, i guess the FSharpOption is wrapped incorrectly when you are assigning just a string.

[LucasNmn]

is this done from C#? If so, i guess the FSharpOption is wrapped incorrectly when you are assigning just a string.

Yes, from C#

[LucasNmn]

Hello. Do you have a solution yet.

[kMutagene]

No i do not have a solution, i have no way of debugging your very specific issue in your very specific use case without any reproducible code.

But i have identified a possible problem in my last answer:

If so, i guess the FSharpOption is wrapped incorrectly when you are assigning just a string.

So i'd suggest trying to set an actual FSharpOption<string> like i suggested:

using Plotly.NET.CSharp;
using Plotly.NET.ImageExport;
using Microsoft.FSharp.Core;

var path = @"executable/path/to/chrome.exe";

FSharpOption<string> opt = FSharpOption<string>.Some(path);

Plotly.NET.ImageExport.PuppeteerSharpRendererOptions.localBrowserExecutablePath = opt;

Chart.Line<int,int,string>(
    x: new int[]{1,2,3,4},
    y: new int[]{1,2,3,4}
).SaveJPG(@"somewhere\test.jpg")

this works in a notebook without issues, so any problems here are specific to your use case in IIS, and might be related to your application not having the rights to use the chromium instance

[kMutagene]

Closing this until we get either feedback or reproducible code