refactor: replace requests with httpx

Swap the HTTP client from requests to httpx for a lighter dependency
footprint. Update README to highlight the lightweight design.

Author: r4sky0

README.md

@@ -4,6 +4,8 @@ fzf-powered OpenAPI API client.
 
 Browse, search, and call any OpenAPI endpoint from the terminal.
 
+Lightweight by design — a single Python file that leans on [fzf](https://github.com/junegunn/fzf) for the interactive UI, with only [httpx](https://www.python-httpx.org/) and [PyYAML](https://pyyaml.org/) as Python dependencies.
+
 ![demo](demo.gif)
 
 ## Install

apick.py

@@ -11,7 +11,7 @@
 from datetime import UTC, datetime
 from urllib.parse import urlencode, urlparse
 
-import requests
+import httpx
 import yaml
 
 HISTORY_FILE = os.path.join(os.path.expanduser("~"), ".apick", "history.json")
@@ -37,7 +37,7 @@ def highlight_json(text: str) -> str:
 def fetch_spec(source: str) -> dict:
     """Fetch and parse an OpenAPI spec from a URL or local file."""
     if urlparse(source).scheme in ("http", "https"):
-        resp = requests.get(source, timeout=30)
+        resp = httpx.get(source, timeout=30)
         resp.raise_for_status()
         content = resp.text
     else:
@@ -444,11 +444,11 @@ def execute_request(
     if body is not None:
         kwargs["json"] = body
 
-    resp = requests.request(method, url, **kwargs)  # noqa: S113 (timeout is in kwargs)
+    resp = httpx.request(method, url, **kwargs)
 
     # Status line
     color = "\033[32m" if resp.status_code < 400 else "\033[31m"
-    print(f"\n{color}{resp.status_code} {resp.reason}\033[0m")
+    print(f"\n{color}{resp.status_code} {resp.reason_phrase}\033[0m")
 
     # Response body
     ct = resp.headers.get("content-type", "")
@@ -631,7 +631,7 @@ def main():
             return
         try:
             execute_request(method, url, headers, body)
-        except requests.RequestException as e:
+        except httpx.HTTPError as e:
             print(f"\n\033[31mRequest failed: {e}\033[0m", file=sys.stderr)
             sys.exit(1)
         return
@@ -697,7 +697,7 @@ def main():
     try:
         status_code = execute_request(ep["method"], url, headers, body)
         _save_to_history(ep["method"], url, headers, body, args.spec, ep["summary"], status_code)
-    except requests.RequestException as e:
+    except httpx.HTTPError as e:
         _save_to_history(ep["method"], url, headers, body, args.spec, ep["summary"], None)
         print(f"\n\033[31mRequest failed: {e}\033[0m", file=sys.stderr)
         sys.exit(1)

pyproject.toml

@@ -10,7 +10,7 @@ readme = "README.md"
 license = "MIT"
 requires-python = ">=3.11"
 dependencies = [
-    "requests",
+    "httpx",
     "pyyaml",
 ]
 keywords = ["openapi", "api", "fzf", "cli"]

tests/test_apick.py

@@ -341,7 +341,7 @@ def test_load_from_url(self):
         mock_resp.text = json.dumps(spec_data)
         mock_resp.raise_for_status = MagicMock()
 
-        with patch("apick.requests.get", return_value=mock_resp) as mock_get:
+        with patch("apick.httpx.get", return_value=mock_resp) as mock_get:
             result = apick.fetch_spec("https://example.com/spec.json")
             mock_get.assert_called_once_with("https://example.com/spec.json", timeout=30)
             assert result == spec_data
@@ -477,10 +477,10 @@ class TestExecuteRequest:
     def test_returns_status_code(self):
         mock_resp = MagicMock()
         mock_resp.status_code = 200
-        mock_resp.reason = "OK"
+        mock_resp.reason_phrase = "OK"
         mock_resp.headers = {"content-type": "text/plain"}
         mock_resp.text = "ok"
 
-        with patch("apick.requests.request", return_value=mock_resp):
+        with patch("apick.httpx.request", return_value=mock_resp):
             result = apick.execute_request("GET", "https://example.com", {})
         assert result == 200