feat(server): finish server part (1/2)

lib/base64_util.py

@@ -0,0 +1,44 @@
+import base64
+import pathlib
+
+def encode_image(path, prefix=True):
+    with open(pathlib.Path.cwd().joinpath(path), "rb") as f:
+        bytes = f.read()
+        encoded_bytes = base64.b64encode(bytes)
+        humanreadable_data = encoded_bytes.decode("utf-8")
+        if prefix is True:
+            result = "data:image/png;base64," + humanreadable_data
+        else:
+            result = humanreadable_data
+        return result
+
+def decode_image(data: str, path):
+    if data.strip().startswith("data:") is True:
+        data = data.split(",")[1]
+    encoded_bytes = data.encode("utf-8")
+    with open(pathlib.Path.cwd().joinpath(path), "wb") as f:
+        bytes = base64.decodebytes(encoded_bytes)
+        f.write(bytes)
+
+def encode_string(data=None, type="text/plain", path=None, prefix=True, encoding="utf-8"):
+    if data is None and path is None:
+        return
+    if data is not None:
+        bytes = data.encode(encoding)
+    elif path is not None:
+        with open(pathlib.Path.cwd().joinpath(path), "r") as f:
+            bytes = f.read()
+    encoded_bytes = base64.b64encode(bytes)
+    humanreadable_data = encoded_bytes.decode(encoding)
+    if prefix is True:
+        result = "data:{};base64,".format(type) + humanreadable_data
+    else:
+        result = humanreadable_data
+    return result
+
+def decode_string(data:str, encoding="utf-8"):
+    if data.strip().startswith("data:") is True:
+        data = data.split(",")[1]
+    encoded_bytes = data.encode(encoding)
+    bytes = base64.decodebytes(encoded_bytes)
+    return bytes.decode(encoding)