Read SD Card GCode-Content during file selection

Development
1

Hi,

I received an issue report that my plugin throws an exception during accesing the sd-card storage.

From technical point of view it is clear for me...but is there a way to read the file-content from the sd-card? How can I do this, is there a filemanager-methode that I can use?

Currently I am reading the file content during the file-selection event like this:

fileLocation = payload.get("origin")
selectedFilename = payload.get("path")

# full path on local file-storage
selectedFile = self._file_manager.path_on_disk(fileLocation, selectedFilename)

with io.open(selectedFile, "r", encoding="ISO-8859-1") as f:
   for line in f:
     #do somethng usefull with the line

If I try to read a file from sd-card I receive this message, after calling path_on_disk:

octoprint.filemanager.NoSuchStorage: No storage configured for destination sdcard

Any ideas?

2

Is that even possible? Can you download a file from sd card? Sorry I don't do too much SD card printing so don't have any experience with it, but I would just only react to events where payload.get("origin") == "local" personally because I don't think the speed would be quick enough reading from SD to be worthwhile dealing with even if it was possible.

3

There are no commands built into firmware that allow reading from the printer's SD card. Consider it a write-only interface.

4

Thx, a lot for the clarification!!
As @jneilliii suggested, in future I will check what kind of file I want to process -> only localfile.