winpe support + windows webdav stuff

README.md

@@ -716,14 +716,18 @@ enable with `--dav`,  supports winxp, win7
 on windows xp/7, connect using the explorer UI:
 * rightclick [my computer] -> [map network drive] -> [Connect to a network server] hyperlink -> [Choose a custom network location] -> `http://192.168.123.1:3923/`
 
+on windows 7/8/10, connect using command prompt (`wark`=password):
+* `net use w: http://192.168.123.1:3923/ wark /user:a`
+
 on windows 7/8/10, disable wpad for performance:
 * control panel -> [network and internet] -> [internet options] -> [connections] tab -> [lan settings] -> automatically detect settings: Nope
 
 known issues:
+* win7 has a bug where it doesn't actually send the password to the server, so please type your password into the username field
+* win7 cannot access servers which require authentication unless you use https or [enable basic authentication](./contrib/webdav-basicauth.reg) for http
+* win7 cannot download files larger than 47.6 MiB by default; [registry fix](./contrib/webdav-unlimit.bat) to allow files up to 4 GiB (actual absolute max on windows)
 * winxp cannot show unicode characters outside of *some range*
   * latin-1 is fine, hiragana is not (not even as shift-jis on japanese xp)
-* win7 cannot access servers which require authentication unless you use https or [enable basic authentication](./contrib/webdav-basicauth.reg) for http
-* win7 has a bug where it doesn't actually send the password to the server, so please type your password into the username field
 
 
 ## file indexing

contrib/webdav-unlimit.bat

@@ -1,7 +1,7 @@
 @echo off
 rem removes the 47.6 MiB filesize limit when downloading from webdav
 
-at > nul
+net session >nul 2>&1
 if %errorlevel% neq 0 (
     echo you must run this as admin
     pause

copyparty/__main__.py

@@ -195,7 +195,8 @@ def init_E(E: EnvParams) -> None:
         E.mod = _unpack()
 
     if sys.platform == "win32":
-        E.cfg = os.path.normpath(os.environ["APPDATA"] + "/copyparty")
+        bdir = os.environ.get("APPDATA") or os.environ.get("TEMP")
+        E.cfg = os.path.normpath(bdir + "/copyparty")
     elif sys.platform == "darwin":
         E.cfg = os.path.expanduser("~/Library/Preferences/copyparty")
     else:

scripts/pyinstaller/loader.py

@@ -66,7 +66,11 @@ def meichk():
 
     pids = []
     ptn = re.compile(r"^([^\s]+)\s+([0-9]+)")
+    try:
         procs = sp.check_output("tasklist").decode("utf-8", "replace")
+    except:
+        procs = ""  # winpe
+
     for ln in procs.splitlines():
         m = ptn.match(ln)
         if m and filt in m.group(1).lower():