Add basic auth ureqeusts and elementtree for xml.

Implement nextcloud directory listing.

uNextcloud.py

@@ -1,25 +1,51 @@
 import ElementTree
-from urllib import urequest
+import urequests
+from urequests import auth
 import gc
 import uos
 
 
 class uNextcloud:
 
-    def __init__(self):
-        self.sd_spi = machine.SPI(0, sck=machine.Pin(18, machine.Pin.OUT), mosi=machine.Pin(19, machine.Pin.OUT), miso=machine.Pin(16, machine.Pin.OUT))
-        self.sd = sdcard.SDCard(sd_spi, machine.Pin(22))
+    class File:
+
+        def __init__(self, url_path, mimetype):
+            self.url_path = url_path
+            self.mimetype = mimetype
+
+        def get_url(self):
+            return self.url_path
+
+        def get_mimetype(self):
+            return self.mimetype
+
+    def __init__(self, nextcloud_url):
+        self.url = nextcloud_url
         self.username = None
         self.password = None
-        uos.mount(sd, "/sd")
-        gc.collect() 
 
     def set_auth(self, username, password):
         self.username = username
         self.password = password
 
-    def get_folder_items(self, folder_path):
-        pass
+    def get_folder_items(self, folder_path=""):
+        response = urequests.request("PROPFIND", self.url+"/remote.php/dav/files/"+self.username+"/"+folder_path, auth=urequests.auth.HTTPBasicAuth(self.username, self.password))
+        if 200 <= response.status_code < 300:
+            file_list = []
+            try:
+                xml = ElementTree.fromstring(response.text)
+                for resp in xml:
+                    href = resp.find_first_by_tag("href")
+                    propstat = resp.find_first_by_tag("propstat")
+                    prop = propstat.find_first_by_tag("prop")
+                    content_type = prop.find_first_by_tag("getcontenttype")
+                    if content_type != None:
+                        file_list.append(self.File(href.text, content_type.text))
+                return file_list
+            except AttributeError:
+                return None
+        else:
+            return None
     
     def download_file_to_path(self, folder_path, file, destination_path):
         pass