use extism_pdk::*;
use serde::{Deserialize, Serialize};
use base64::Engine as _;
use base64::engine::general_purpose::STANDARD as BASE64;
mod base64_bytes {
use serde::{self, Deserialize, Deserializer, Serializer};
use base64::Engine as _;
use base64::engine::general_purpose::STANDARD as BASE64;
pub fn serialize<S>(bytes: &Vec<u8>, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
serializer.serialize_str(&BASE64.encode(bytes))
}
pub fn deserialize<'de, D>(deserializer: D) -> Result<Vec<u8>, D::Error>
where
D: Deserializer<'de>,
{
let s = String::deserialize(deserializer)?;
BASE64.decode(&s).map_err(serde::de::Error::custom)
}
}
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
struct CodecEncodeRequest {
#[serde(with = "base64_bytes")]
data: Vec<u8>,
}
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
struct CodecEncodeResponse {
#[serde(default)]
#[serde(with = "base64_bytes")]
result: Vec<u8>,
#[serde(default)]
error: Option<String>,
}
#[host_fn]
extern "ExtismHost" {
fn codec_encode(input: Json<CodecEncodeRequest>) -> Json<CodecEncodeResponse>;
}
pub fn encode(data: Vec<u8>) -> Result<Vec<u8>, Error> {
let response = unsafe {
codec_encode(Json(CodecEncodeRequest {
data: data,
}))?
};
if let Some(err) = response.0.error {
return Err(Error::msg(err));
}
Ok(response.0.result)
}