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document early_request_filter
Fix #363 Signed-off-by: spacewander <spacewanderlzx@gmail.com>
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2 changed files with 8 additions and 3 deletions
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@ -16,7 +16,8 @@ The pingora-proxy HTTP proxy framework supports highly programmable proxy behavi
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Pingora-proxy allows users to insert arbitrary logic into the life of a request.
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Pingora-proxy allows users to insert arbitrary logic into the life of a request.
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```mermaid
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```mermaid
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graph TD;
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graph TD;
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start("new request")-->request_filter;
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start("new request")-->early_request_filter;
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early_request_filter-->request_filter;
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request_filter-->upstream_peer;
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request_filter-->upstream_peer;
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upstream_peer-->Connect{{IO: connect to upstream}};
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upstream_peer-->Connect{{IO: connect to upstream}};
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@ -52,9 +53,12 @@ Pingora-proxy allows users to insert arbitrary logic into the life of a request.
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* The reason both `upstream_response_*_filter()` and `response_*_filter()` exist is for HTTP caching integration reasons (still WIP).
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* The reason both `upstream_response_*_filter()` and `response_*_filter()` exist is for HTTP caching integration reasons (still WIP).
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### `request_filter()`
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### `early_request_filter()`
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This is the first phase of every request.
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This is the first phase of every request.
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This function is similar to `request_filter()` but execute before any other logic especially the downstream modules.
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### `request_filter()`
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This phase is usually for validating request inputs, rate limiting, and initializing context.
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This phase is usually for validating request inputs, rate limiting, and initializing context.
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### `proxy_upstream_filter()`
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### `proxy_upstream_filter()`
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@ -1,7 +1,8 @@
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Pingora proxy phases without caching
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Pingora proxy phases without caching
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```mermaid
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```mermaid
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graph TD;
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graph TD;
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start("new request")-->request_filter;
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start("new request")-->early_request_filter;
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early_request_filter-->request_filter;
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request_filter-->upstream_peer;
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request_filter-->upstream_peer;
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upstream_peer-->Connect{{IO: connect to upstream}};
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upstream_peer-->Connect{{IO: connect to upstream}};
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