Wraps the fetch promise to enable direct method chaining. This allows calling response methods directly on the fetch promise: `await fetch(url).json()` instead of requiring two separate awaits. This feels more Pythonic since it matches typical usage patterns Python developers
| 89 | |
| 90 | |
| 91 | class _FetchPromise: |
| 92 | """ |
| 93 | Wraps the fetch promise to enable direct method chaining. |
| 94 | |
| 95 | This allows calling response methods directly on the fetch promise: |
| 96 | `await fetch(url).json()` instead of requiring two separate awaits. |
| 97 | |
| 98 | This feels more Pythonic since it matches typical usage patterns |
| 99 | Python developers have got used to via libraries like `requests`. |
| 100 | """ |
| 101 | |
| 102 | def __init__(self, promise): |
| 103 | self._promise = promise |
| 104 | # To be resolved in the future via the setup() static method. |
| 105 | promise._response = None |
| 106 | # Add convenience methods directly to the promise. |
| 107 | promise.arrayBuffer = self.arrayBuffer |
| 108 | promise.blob = self.blob |
| 109 | promise.bytearray = self.bytearray |
| 110 | promise.json = self.json |
| 111 | promise.text = self.text |
| 112 | |
| 113 | @staticmethod |
| 114 | def setup(promise, response): |
| 115 | """ |
| 116 | Store the resolved response on the promise for later access. |
| 117 | """ |
| 118 | promise._response = _FetchResponse(response) |
| 119 | return promise._response |
| 120 | |
| 121 | async def _get_response(self): |
| 122 | """ |
| 123 | Get the cached response, or await the promise if not yet resolved. |
| 124 | """ |
| 125 | if not self._promise._response: |
| 126 | await self._promise |
| 127 | return self._promise._response |
| 128 | |
| 129 | async def arrayBuffer(self): |
| 130 | response = await self._get_response() |
| 131 | return await response.arrayBuffer() |
| 132 | |
| 133 | async def blob(self): |
| 134 | response = await self._get_response() |
| 135 | return await response.blob() |
| 136 | |
| 137 | async def bytearray(self): |
| 138 | response = await self._get_response() |
| 139 | return await response.bytearray() |
| 140 | |
| 141 | async def json(self): |
| 142 | response = await self._get_response() |
| 143 | return await response.json() |
| 144 | |
| 145 | async def text(self): |
| 146 | response = await self._get_response() |
| 147 | return await response.text() |
| 148 |