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e8863ed147
* feat: implement raw binary framing for host function responses Signed-off-by: Deluan <deluan@navidrome.org> * feat: add CallRaw method for Subsonic API to handle binary responses Signed-off-by: Deluan <deluan@navidrome.org> * test: add tests for raw=true methods and binary framing generation Signed-off-by: Deluan <deluan@navidrome.org> * fix: improve error message for malformed raw responses to indicate incomplete header Signed-off-by: Deluan <deluan@navidrome.org> * fix: add wasm_import_module attribute for raw methods and improve content-type handling Signed-off-by: Deluan <deluan@navidrome.org> --------- Signed-off-by: Deluan <deluan@navidrome.org>
74 lines
2.3 KiB
Rust
74 lines
2.3 KiB
Rust
// Code generated by ndpgen. DO NOT EDIT.
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//
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// This file contains client wrappers for the Stream host service.
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// It is intended for use in Navidrome plugins built with extism-pdk.
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use extism_pdk::*;
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use serde::{Deserialize, Serialize};
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#[derive(Debug, Clone, Serialize)]
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#[serde(rename_all = "camelCase")]
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struct StreamGetStreamRequest {
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uri: String,
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}
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#[host_fn]
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extern "ExtismHost" {
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}
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#[link(wasm_import_module = "extism:host/user")]
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extern "C" {
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fn stream_getstream(offset: u64) -> u64;
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}
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/// GetStream returns raw binary stream data with content type.
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///
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/// # Arguments
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/// * `uri` - String parameter.
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///
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/// # Returns
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/// A tuple of (content_type, data) with the raw binary response.
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///
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/// # Errors
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/// Returns an error if the host function call fails.
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pub fn get_stream(uri: &str) -> Result<(String, Vec<u8>), Error> {
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let req = StreamGetStreamRequest {
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uri: uri.to_owned(),
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};
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let input_bytes = serde_json::to_vec(&req).map_err(|e| Error::msg(e.to_string()))?;
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let input_mem = Memory::from_bytes(&input_bytes).map_err(|e| Error::msg(e.to_string()))?;
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let response_offset = unsafe { stream_getstream(input_mem.offset()) };
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let response_mem = Memory::find(response_offset)
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.ok_or_else(|| Error::msg("empty response from host"))?;
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let response_bytes = response_mem.to_vec();
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if response_bytes.is_empty() {
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return Err(Error::msg("empty response from host"));
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}
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if response_bytes[0] == 0x01 {
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let msg = String::from_utf8_lossy(&response_bytes[1..]).to_string();
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return Err(Error::msg(msg));
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}
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if response_bytes[0] != 0x00 {
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return Err(Error::msg("unknown response status"));
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}
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if response_bytes.len() < 5 {
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return Err(Error::msg("malformed raw response: incomplete header"));
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}
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let ct_len = u32::from_be_bytes([
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response_bytes[1],
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response_bytes[2],
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response_bytes[3],
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response_bytes[4],
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]) as usize;
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if ct_len > response_bytes.len() - 5 {
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return Err(Error::msg("malformed raw response: content-type overflow"));
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}
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let ct_end = 5 + ct_len;
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let content_type = String::from_utf8_lossy(&response_bytes[5..ct_end]).to_string();
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let data = response_bytes[ct_end..].to_vec();
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Ok((content_type, data))
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}
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