Struct fastly::KVStore

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pub struct KVStore { /* private fields */ }

Expand description

A Compute@Edge KV Store.

Keys in the KV Store must follow the following rules:

Keys can contain any sequence of valid Unicode characters, of length 1-1024 bytes when UTF-8 encoded.
Keys cannot contain Carriage Return or Line Feed characters.
Keys cannot start with .well-known/acme-challenge/.
Keys cannot be named . or ...

Implementations§

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impl KVStore

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pub fn open(name: &str) -> Result<Option<Self>, KVStoreError>

Open the KV Store with the given name.

If there is no store by that name, this returns Ok(None).

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pub fn lookup(&self, key: &str) -> Result<Option<Body>, KVStoreError>

Look up a value in the KV Store.

Returns Ok(Some(Body)) if the value is found, and Ok(None) if the key was not found.

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pub fn lookup_bytes(&self, key: &str) -> Result<Option<Vec<u8>>, KVStoreError>

Look up a value in the KV Store, and return it as a byte vector.

Returns Ok(Some(Vec<u8>)) if the value is found, and Ok(None) if the key was not found.

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pub fn lookup_str(&self, key: &str) -> Result<Option<String>, KVStoreError>

Look up a value in the KV Store, and return it as a string.

Returns Ok(Some(String)) if the value is found, and Ok(None) if the key was not found.

Panics

Panics if the value is not a valid UTF-8 string.

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pub fn insert( &mut self, key: &str, value: impl Into<Body> ) -> Result<(), KVStoreError>

Insert a value into the KV Store.

If the store already contained a value for this key, it will be overwritten.

The value may be provided as any type that can be converted to Body, such as &[u8], Vec<u8>, &str, or String.

The size of the value must be known when calling this method. In practice, that means that if a Body value contains an external request or response, it must be encoded with Content-Length rather than Transfer-Encoding: chunked.

For the moment, this method will return StoreError::Unexpected(FastlyStatus::INVAL) if the value size is not known. This will be replaced by a more specific error value in a future release.