added urequest.py

urllib/urequest.py

@@ -0,0 +1,65 @@
+import usocket
+
+def urlopen(url, data=None, method="GET"):
+    if data is not None and method == "GET":
+        method = "POST"
+    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)
+
+    ai = usocket.getaddrinfo(host, port)
+    addr = ai[0][4]
+
+    s = usocket.socket()
+    try:
+        s.connect(addr)
+        if proto == "https:":
+            s = ussl.wrap_socket(s, server_hostname=host)
+
+        s.write(method)
+        s.write(b" /")
+        s.write(path)
+        s.write(b" HTTP/1.0\r\nHost: ")
+        s.write(host)
+        s.write(b"\r\n")
+
+        if data:
+            s.write(b"Content-Length: ")
+            s.write(str(len(data)))
+            s.write(b"\r\n")
+        s.write(b"\r\n")
+        if data:
+            s.write(data)
+
+        l = s.readline()
+        protover, status, msg = l.split(None, 2)
+        status = int(status)
+        #print(protover, status, msg)
+        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)
+            elif l.startswith(b"Location:"):
+                raise NotImplementedError("Redirects not yet supported")
+    except OSError:
+        s.close()
+        raise
+
+    return s