Add basic auth ureqeusts and elementtree for xml.

Implement nextcloud directory listing.

urequests/__init__.py

@@ -0,0 +1,169 @@
+# (c) 2016-2021 Paul Sokolovsky, MIT license, https://github.com/pfalcon/pycopy-lib
+import usocket
+
+class Request:
+    pass
+
+
+class Response:
+
+    def __init__(self, f):
+        self.raw = f
+        self.encoding = "utf-8"
+        self._cached = None
+
+    def close(self):
+        if self.raw:
+            self.raw.close()
+            self.raw = None
+        self._cached = None
+
+    @property
+    def content(self):
+        if self._cached is None:
+            try:
+                self._cached = self.raw.read()
+            finally:
+                self.raw.close()
+                self.raw = None
+        return self._cached
+
+    @property
+    def text(self):
+        return str(self.content, self.encoding)
+
+    def json(self):
+        import ujson
+        return ujson.loads(self.content)
+
+
+def request(method, url, data=None, json=None, headers={}, auth=None, stream=None, parse_headers=True):
+    redir_cnt = 1
+    if json is not None:
+        assert data is None
+        import ujson
+        data = ujson.dumps(json)
+
+    while True:
+        try:
+            proto, dummy, host, path = url.split("/", 3)
+        except ValueError:
+            proto, dummy, host = url.split("/", 2)
+            path = ""
+        if proto == "http:":
+            port = 80
+        elif proto == "https:":
+            import ussl
+            port = 443
+        else:
+            raise ValueError("Unsupported protocol: " + proto)
+
+        if ":" in host:
+            host, port = host.split(":", 1)
+            port = int(port)
+
+        if auth is not None:
+            req = Request()
+            req.method = method
+            req.url = url
+            if not headers:
+                # Fresh local dict, not a copy of anything.
+                headers = {}
+            req.headers = headers
+            req = auth(req)
+            headers = req.headers
+
+        ai = usocket.getaddrinfo(host, port, 0, usocket.SOCK_STREAM)
+        ai = ai[0]
+
+        resp_d = None
+        if parse_headers is not False:
+            resp_d = {}
+
+        s = usocket.socket(ai[0], ai[1], ai[2])
+        try:
+            s.connect(ai[-1])
+            if proto == "https:":
+                s = ussl.wrap_socket(s, server_hostname=host)
+            s.write(b"%s /%s HTTP/1.0\r\n" % (method, path))
+            if not "Host" in headers:
+                s.write(b"Host: %s\r\n" % host)
+            # Iterate over keys to avoid tuple alloc
+            for k in headers:
+                s.write(k)
+                s.write(b": ")
+                s.write(headers[k])
+                s.write(b"\r\n")
+            if json is not None:
+                s.write(b"Content-Type: application/json\r\n")
+            if data:
+                s.write(b"Content-Length: %d\r\n" % len(data))
+            s.write(b"Connection: close\r\n\r\n")
+            if data:
+                s.write(data)
+
+            l = s.readline()
+            #print(l)
+            l = l.split(None, 2)
+            status = int(l[1])
+            reason = ""
+            if len(l) > 2:
+                reason = l[2].rstrip()
+            while True:
+                l = s.readline()
+                if not l or l == b"\r\n":
+                    break
+                #print(l)
+
+                if l.startswith(b"Transfer-Encoding:"):
+                    if b"chunked" in l:
+                        raise ValueError("Unsupported " + l.decode())
+                elif l.startswith(b"Location:") and 300 <= status <= 399:
+                    if not redir_cnt:
+                        raise ValueError("Too many redirects")
+                    redir_cnt -= 1
+                    url = l[9:].decode().strip()
+                    #print("redir to:", url)
+                    status = 300
+                    break
+
+                if parse_headers is False:
+                    pass
+                elif parse_headers is True:
+                    l = l.decode()
+                    k, v = l.split(":", 1)
+                    resp_d[k] = v.strip()
+                else:
+                    parse_headers(l, resp_d)
+        except OSError:
+            s.close()
+            raise
+
+        if status != 300:
+            break
+
+    resp = Response(s)
+    resp.status_code = status
+    resp.reason = reason
+    if resp_d is not None:
+        resp.headers = resp_d
+    return resp
+
+
+def head(url, **kw):
+    return request("HEAD", url, **kw)
+
+def get(url, **kw):
+    return request("GET", url, **kw)
+
+def post(url, **kw):
+    return request("POST", url, **kw)
+
+def put(url, **kw):
+    return request("PUT", url, **kw)
+
+def patch(url, **kw):
+    return request("PATCH", url, **kw)
+
+def delete(url, **kw):
+    return request("DELETE", url, **kw)