Add API call to download one file

[wonder-sk]

Currently, there's no simple way to fetch just one file from a project. There is download_file() API call, but it needs the project to be already downloaded (it is useful just to get older versions of a file).

One could either query MM server API directly, e.g.:

https://app.merginmaps.com/v1/project/raw/<workspace>/<project>?file=myfile.gpkg

(with appropriate auth token)

Alternatively, using python with a workaround like this (handles auth stuff):

from mergin import MerginClient
from mergin.utils import save_to_file

mergin_client = MerginClient(...)
res = mergin_client.get('/v1/project/raw/<workspace>/<project>', data={'file': 'myfile.gpkg'})
save_to_file(res, 'myfile.gpkg')

If we add support for this, maybe we could just update the existing download_file() implementation so that it will accept as the first argument either <workspace>/<project> or it would accept an existing the local directory with a project downloaded already.

[MarcelGeo]

Yeah, this will be useful. There is problem if you call download_file , metadata of project must be there ... you have to call download_project before (:-O) . I think we need to update download_file method to accept project_id instead project_dir . Or create separated method to download file based on project path / id without need to get project_info.

[01mk027]

fırst of all i wanna giving many of thanks for this response, but i need to learn something more . in

client.get('/v1/project/raw/<workspace>/<project>', data={'file': 'myfile.gpkg'}),

is v1 refers to project version? or version of mergin client api? thanks dear @wonder-sk @MarcelGeo

and i cant see updated versions of gpkg files (or i may misunderstand something in this case)

def downloadfile(request):
    try:
        if request.method == "POST":
            namespace = request.data['namespace']
            project_name = request.data['project_name']		
            file_path = request.data['file_path']
            output_filename = file_path
            # res = mergin_client.get('/v1/project/raw/<workspace>/<project>', data={'file': 'myfile.gpkg'})
            # version = None    
            # Create project directory if not exists
            project_dir = os.path.join('../projects', project_name)
            os.makedirs(project_dir, exist_ok=True)  # exist_ok prevents error if dir exists
            client = mergin.MerginClient(login=request.session["username"], password=request.session["password"])
            # bring latest version
            res = client.get(f'/v1/project/raw/{namespace}/{project_name}', data = {'file': f'{file_path}'})
            save_to_file(res, f'{project_dir}/{output_filename}')
            return JsonResponse({"res": 'o'})
    except Exception as e:
        # Handle errors and return an error message
        return JsonResponse({"error": str(e)}, status=400)

will this code block help to retrieve recently updated version of specified file? If not so, i need small hint dear @tomasMizera , @wonder-sk , @MarcelGeo

[MarcelGeo]

@01mk027 sorry for late response. But this v1 reffers to version of public api.