Module html 

HTML string helpers for plugins that mutate text/html responses.

Layering

1. String ops — inject, inject_before, replace_once, replace_between (markers / anchors, no HTTP).
2. Response — crate::Response::map_buffered_html skips streams / non-HTML.
3. Middleware — crate::middleware::before / [after] / [around] / [map_html] for request/response hooks around the whole chain.

Prefer markers (<!-- plugin -->) so stacked injects stay idempotent. Template-slot style edits: put <!--slot:name-->…<!--/slot:name--> in the document and use replace_between.

Structs

HtmlInject

Options for inject.

Enums

HtmlAnchor

Where to place a fragment inside an HTML document.

Functions

find_ci

Case-insensitive substring search; returns byte index in hay (ASCII tags).

inject

Apply HtmlInject. Returns None when skipped or unchanged.

inject_after_open_tag

Insert fragment immediately after the first case-insensitive open tag needle (e.g. "<body" → after the closing > of that tag).

inject_before

Insert fragment immediately before the first case-insensitive needle.

inject_body_end

Convenience: before </body> with marker.

inject_head

Convenience: head inject with marker.

replace_between

Replace content between start_marker and end_marker (exclusive markers kept).

replace_once

Replace the first occurrence of from with to (case-sensitive).