add fern sdk (#1786)

skyvern/client/core/file.py

@@ -0,0 +1,67 @@
+# This file was auto-generated by Fern from our API Definition.
+
+from typing import IO, Dict, List, Mapping, Optional, Tuple, Union, cast
+
+# File typing inspired by the flexibility of types within the httpx library
+# https://github.com/encode/httpx/blob/master/httpx/_types.py
+FileContent = Union[IO[bytes], bytes, str]
+File = Union[
+    # file (or bytes)
+    FileContent,
+    # (filename, file (or bytes))
+    Tuple[Optional[str], FileContent],
+    # (filename, file (or bytes), content_type)
+    Tuple[Optional[str], FileContent, Optional[str]],
+    # (filename, file (or bytes), content_type, headers)
+    Tuple[
+        Optional[str],
+        FileContent,
+        Optional[str],
+        Mapping[str, str],
+    ],
+]
+
+
+def convert_file_dict_to_httpx_tuples(
+    d: Dict[str, Union[File, List[File]]],
+) -> List[Tuple[str, File]]:
+    """
+    The format we use is a list of tuples, where the first element is the
+    name of the file and the second is the file object. Typically HTTPX wants
+    a dict, but to be able to send lists of files, you have to use the list
+    approach (which also works for non-lists)
+    https://github.com/encode/httpx/pull/1032
+    """
+
+    httpx_tuples = []
+    for key, file_like in d.items():
+        if isinstance(file_like, list):
+            for file_like_item in file_like:
+                httpx_tuples.append((key, file_like_item))
+        else:
+            httpx_tuples.append((key, file_like))
+    return httpx_tuples
+
+
+def with_content_type(*, file: File, default_content_type: str) -> File:
+    """
+    This function resolves to the file's content type, if provided, and defaults
+    to the default_content_type value if not.
+    """
+    if isinstance(file, tuple):
+        if len(file) == 2:
+            filename, content = cast(Tuple[Optional[str], FileContent], file)  # type: ignore
+            return (filename, content, default_content_type)
+        elif len(file) == 3:
+            filename, content, file_content_type = cast(Tuple[Optional[str], FileContent, Optional[str]], file)  # type: ignore
+            out_content_type = file_content_type or default_content_type
+            return (filename, content, out_content_type)
+        elif len(file) == 4:
+            filename, content, file_content_type, headers = cast(  # type: ignore
+                Tuple[Optional[str], FileContent, Optional[str], Mapping[str, str]], file
+            )
+            out_content_type = file_content_type or default_content_type
+            return (filename, content, out_content_type, headers)
+        else:
+            raise ValueError(f"Unexpected tuple length: {len(file)}")
+    return (None, file, default_content_type)