Is spine.js truly capable of 'streamlining' POST requests?

I recently came across a post by Alex Maccaw, where he discusses the challenges of sending Ajax requests in parallel:

Maccaw explains that if a user creates a record and quickly updates it, two Ajax requests are sent simultaneously - a POST and a PUT. However, the server may process the 'update' request before the 'create' one, causing confusion as the record has not yet been created.

To address this issue, Spine defaults to queuing up Ajax requests serially, ensuring that POST, PUT, and DELETE methods are sent one at a time, with the next request only being sent after the previous one has completed successfully.

In contrast, the HTTP spec (referenced here) cautions against pipelining non-idempotent requests, as premature termination of the connection could lead to unpredictable outcomes.

This raises the question: does Spine really implement a pipeline for POST requests?

javascriptajaxhttpspine.js

Answer №1

Although Maccaw uses the term "pipelining", it is important to note that his definition differs from that of the HTTP specification and actually contradicts it.

In the context of the HTTP spec, "pipelining" refers to the practice of sending multiple requests without waiting for individual responses. You can refer to Section 8.1.2.2 for more information.

A client with persistent connections has the option to "pipeline" its requests by sending them without waiting for each response.

Given this explanation, it becomes clear why the spec discourages pipelining non-idempotent requests since a request within the pipeline could alter the application's state unexpectedly.

When Maccaw discusses spine's "pipelining", he is essentially referring to the solution for handling requests when clients are programmed to send them without waiting for responses as outlined in the HTTP spec. In this regard, spinejs organizes and executes these requests sequentially, ensuring that each subsequent request only occurs after the completion of its predecessor.

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