Expect

The :expect plugin enables sending the expect: 100-continue header on all requests that contain a request body (POST, PATCH…).

httpx already supported the flow when the user would pass the header manually, however, this plugin adds the following features on top of it:

• It resends the request without the Expect header if the server responds with 417 Expectation Failed.
• It sends the body after the number of seconds defined in the :expect_timeout option (default: 2) if no 100 Continue response is received (similar to what curl does).

:expect_timeout

You can set how long (in seconds) you want to wait for the 100 Continue response before sending the body.

:expect_threshold_size

When set, it means: the byte size threshold until which the expect: 100-continue header won’t be sent. This option is here if some requests are so small that using expect: 100-continue only generates needless round-trips, but you’d still like to enable it when uploading files.

HTTPX.plugin(:expect, expect_timeout: 10).post("https://example.com")

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