mirror of
https://expo.survex.com/repositories/troggle/.git
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113 lines
4.5 KiB
Python
113 lines
4.5 KiB
Python
from pathlib import Path
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from django.conf import settings
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from django.http import HttpResponse
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from django.shortcuts import render
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from troggle.core.models.survex import DrawingFile
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from troggle.core.views.expo import getmimetype
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# import parsers.surveys
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"""Some of these views serve files as binary blobs, and simply set the mime type based on the file extension,
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as does the urls.py dispatcher which sends them here. Here they should actually have the filetype checked
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by looking inside the file before being served.
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"""
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todo = """- Need to check if invalid query string is invalid, or produces multiple replies
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and render a user-friendly error page.
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"""
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def unescape(input):
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"""These look like HTML entities, but they are not. They are tunnel-specific encodings"""
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codes = {
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"&space;": " ",
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""": '"',
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"&tab;": "\t",
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"&backslash;": "\\",
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"&newline;": "\n|\t",
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"&apostrophe": "'",
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}
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for c in codes:
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# print(c, codes[c])
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input = input.replace(c, codes[c])
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return input
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def dwgallfiles(request):
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"""Report on all the drawing files in the system. These were loaded by parsing the entire directory tree"""
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dwgfiles = DrawingFile.objects.all()
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return render(request, "dwgfiles.html", {"dwgfiles": dwgfiles, "settings": settings})
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def dwgfilesingle(request, path):
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"""sends a single binary file to the user. It could be an old PNG, PDF or SVG
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not just Tunnel or Therion
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The db records created on datbase reset import are not used when we look for an individual drawing, only
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collections of them.
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Note the infelicity that this will deliver files that exist, but are hidden on the previous
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webpage /dwgupload/... if the user types the filename into the browser bar. Could be a problem?
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Should we validate using uploads.py dwgvaliddisp() here too?
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"""
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tfile = Path(settings.DRAWINGS_DATA, path.replace(":", "#"))
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if not tfile.is_file():
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message = f"Drawing file not found in filesystem at '{path}' \n\t\tMaybe a new dataimport needs to be done to get up to date."
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return render(request, "errors/generic.html", {"message": message})
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if Path(tfile).suffix in [
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".xml"
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]: # tunnel files are usually 'us-ascii' (!). And may not close all XML tags properly either.
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for encoding in ["us-ascii", "iso-8859-1", "utf-8"]:
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try:
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# print(f'attempting {encoding} for {tfile}')
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with open(tfile, encoding=encoding, errors="strict") as f:
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print(f"- before reading any {encoding}")
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lines = f.readlines()
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# print(f'- finished reading {encoding}')
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clean = []
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for l in lines:
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clean.append(unescape(l)) # deals with strangely embedded survex file
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# print(f'- Cleaned and stripped.')
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try:
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return HttpResponse(content=clean, content_type="text/xml")
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except:
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return HttpResponse(
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content=f"Render fail for this file: {tfile} Please report to a nerd. Probably Julian's fault."
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)
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except:
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print(f"! Exception when reading {encoding}")
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continue
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print(f"! None of those encodings worked for {tfile}")
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try:
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return HttpResponse(content=open(tfile, errors="ignore"), content_type=getmimetype(tfile))
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except:
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return HttpResponse(
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content=f"Unable to understand the encoding for this file: {tfile} Please report to a nerd."
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)
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if Path(tfile).suffix in ["th2", ".th"]:
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try:
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return HttpResponse(content=open(tfile, errors="strict"), content_type="text/txt") # default utf-8
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except:
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return HttpResponse(
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content=f"Unable to understand the encoding for this file: {tfile} Please report to a nerd."
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)
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else: # SVG, JPG etc
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try:
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return HttpResponse(content=open(tfile, mode="rb"), content_type=getmimetype(tfile)) # default utf-8
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except:
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try:
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return HttpResponse(content=open(tfile, mode="rb"))
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except:
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return HttpResponse(
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content=f"Unable to understand the encoding '{getmimetype(tfile)}' for this file: {tfile} Note that Apache will do its own thing here. Please report to a nerd."
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)
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