add rerank model support

Cargo.toml

@@ -4,7 +4,7 @@ license = "MIT"
 description = "A unofficial Rust library for the Ernie API"
 homepage = "https://github.com/chenwanqq/erniebot-rs"
 repository = "https://github.com/chenwanqq/erniebot-rs"
-version = "0.1.1"
+version = "0.2.0"
 edition = "2021"
 exclude = [".github/",".vscode/",".gitignore"]
 
@@ -17,12 +17,12 @@ strum_macros = "0.26.1"
 serde = {version = "1.0.197", features = ["derive"]}
 serde_json = "1.0.113"
 url = "2.5.0"
-reqwest = {version = "0.11.6", features = ["json","blocking"]}
+reqwest = {version = "0.12.3", features = ["json","blocking"]}
 thiserror = "1.0.57"
 json_value_merge = "2.0"
-reqwest-eventsource = "0.5.0"
+reqwest-eventsource = "0.6.0"
 tokio = { version = "1.36.0", features = ["full"] }
 tokio-stream = "0.1.14"
-base64 = "0.21.7"
-image = "0.24.9"
+base64 = "0.22.0"
+image = "0.25.1"
 schemars = "0.8"

README.md

@@ -2,6 +2,8 @@
 
 Unofficial Baidu Ernie(Wenxin Yiyan, Qianfan) Rust SDK, currently supporting three modules: chat, text embedding (embedding), and text-to-image generation (text2image).
 
+**update in 2024/04/09**: Add support for the bce-reranker-base-v1 rerank model
+
 ## Installation
 
 Add the following to your Cargo.toml file:

README_zh.md

@@ -2,6 +2,8 @@
 
 非官方的百度千帆大模型（文心一言，或者是Ernie，随便啦）SDK, 目前支持对话(chat)，文本嵌入(embedding)以及文生图(text2image)三个模块。
 
+**2024/04/09更新**: 添加对bce-reranker-base-v1重排序模型的支持
+
 ## 安装 
 
 在`Cargo.toml`文件中添加以下内容： 

examples/embedding.rs

@@ -26,5 +26,7 @@ fn test_async_embedding() {
 
 fn main() {
  test_embedding();
+ //sleep to avoid qps
+ std::thread::sleep(std::time::Duration::from_secs(1));
  test_async_embedding();
 }

examples/rerank.rs

@@ -0,0 +1,36 @@
+use erniebot_rs::reranker::{RerankerEndpoint, RerankerModel};
+use tokio::runtime::Runtime;
+
+fn test_reranker() {
+ let reranker = RerankerEndpoint::new(RerankerModel::BceRerankerBaseV1).unwrap();
+ let query = "你好".to_string();
+ let documents = vec![
+ "你好".to_string(),
+ "你叫什么名字".to_string(),
+ "你是谁".to_string(),
+ ];
+ let reranker_response = reranker.invoke(query, documents, None, None).unwrap();
+ let reranker_results = reranker_response.get_reranker_response().unwrap();
+ println!("{},{:?}", reranker_results.len(), reranker_results);
+}
+
+fn test_async_reranker() {
+ let reranker = RerankerEndpoint::new(RerankerModel::BceRerankerBaseV1).unwrap();
+ let query = "你好".to_string();
+ let documents = vec![
+ "你好".to_string(),
+ "你叫什么名字".to_string(),
+ "你是谁".to_string(),
+ ];
+ let rt = Runtime::new().unwrap();
+ let reranker_response = rt
+ .block_on(reranker.ainvoke(query, documents, None, None))
+ .unwrap();
+ let reranker_results = reranker_response.get_reranker_response().unwrap();
+ println!("{},{:?}", reranker_results.len(), reranker_results);
+}
+
+fn main() {
+ test_reranker();
+ test_async_reranker();
+}

src/lib.rs

@@ -3,6 +3,7 @@ pub mod chat;
 /// Toolset to interact with embedding model in Qianfan platform
 pub mod embedding;
 pub mod errors;
+pub mod reranker;
 /// Toolset to interact with text2image model in Qianfan platform
 pub mod text2image;
 pub mod utils;

src/reranker/endpoint.rs

@@ -0,0 +1,99 @@
+use super::model::RerankerModel;
+use super::response::RerankerResponse;
+use crate::errors::ErnieError;
+use crate::utils::{build_url, get_access_token};
+use json_value_merge::Merge;
+use serde_json::Value;
+use url::Url;
+
+static RERANKER_BASE_URL: &str =
+ "https://aip.baidubce.com/rpc/2.0/ai_custom/v1/wenxinworkshop/reranker/";
+
+/** ChatEndpoint is a struct that represents the chat endpoint of erniebot API
+*/
+pub struct RerankerEndpoint {
+ url: Url,
+ access_token: String,
+}
+
+impl RerankerEndpoint {
+ // create a new embedding instance using pre-defined model
+ pub fn new(model: RerankerModel) -> Result<Self, ErnieError> {
+ Ok(RerankerEndpoint {
+ url: build_url(RERANKER_BASE_URL, model.to_string().as_str())?,
+ access_token: get_access_token()?,
+ })
+ }
+ /// sync invoke
+ pub fn invoke(
+ &self,
+ query: String,
+ documents: Vec<String>,
+ top_n: Option<u64>,
+ user_id: Option<String>,
+ ) -> Result<RerankerResponse, ErnieError> {
+ let mut body = serde_json::json!({
+ "query": query,
+ "documents": documents,
+ });
+ if let Some(top_n) = top_n {
+ body.merge(&serde_json::json!({"top_n": top_n}));
+ }
+ if let Some(user_id) = user_id {
+ body.merge(&serde_json::json!({"user_id": user_id}));
+ }
+ let client = reqwest::blocking::Client::new();
+ let response: Value = client
+ .post(self.url.as_str())
+ .query(&[("access_token", self.access_token.as_str())])
+ .json(&body)
+ .send()
+ .map_err(|e| ErnieError::InvokeError(e.to_string()))?
+ .json()
+ .map_err(|e| ErnieError::InvokeError(e.to_string()))?;
+
+ //if error_code key in response, means RemoteAPIError
+ if response.get("error_code").is_some() {
+ return Err(ErnieError::RemoteAPIError(response.to_string()));
+ }
+
+ Ok(RerankerResponse::new(response))
+ }
+ ///async invoke
+ pub async fn ainvoke(
+ &self,
+ query: String,
+ documents: Vec<String>,
+ top_n: Option<u64>,
+ user_id: Option<String>,
+ ) -> Result<RerankerResponse, ErnieError> {
+ let mut body = serde_json::json!({
+ "query": query,
+ "documents": documents,
+ });
+ if let Some(top_n) = top_n {
+ body.merge(&serde_json::json!({"top_n": top_n}));
+ }
+ if let Some(user_id) = user_id {
+ body.merge(&serde_json::json!({"user_id": user_id}));
+ }
+ let client = reqwest::Client::new();
+ let response: Value = client
+ .post(self.url.as_str())
+ .query(&[("access_token", self.access_token.as_str())])
+ .json(&body)
+ .send()
+ .await
+ .map_err(|e| ErnieError::InvokeError(e.to_string()))?
+ .json()
+ .await
+ .map_err(|e| ErnieError::InvokeError(e.to_string()))?;
+
+ //if error_code key in response, means RemoteAPIError
+ if response.get("error_code").is_some() {
+ return Err(ErnieError::RemoteAPIError(response.to_string()));
+ }
+
+ Ok(RerankerResponse::new(response))
+ }
+}

src/reranker/mod.rs

@@ -0,0 +1,7 @@
+mod endpoint;
+mod model;
+mod response;
+
+pub use endpoint::RerankerEndpoint;
+pub use model::RerankerModel;
+pub use response::RerankerResponse;

src/reranker/model.rs

@@ -0,0 +1,11 @@
+use serde::{Deserialize, Serialize};
+use strum_macros::{Display, EnumString};
+
+#[derive(Debug, Default, Clone, Serialize, Deserialize, EnumString, Display, PartialEq, Eq)]
+#[non_exhaustive]
+pub enum RerankerModel {
+ #[default]
+ #[strum(serialize = "bce_reranker_base")]
+ #[serde(rename = "bce_reranker_base")]
+ BceRerankerBaseV1,
+}

src/reranker/response.rs

@@ -0,0 +1,71 @@
+use crate::errors::ErnieError;
+use serde::{Deserialize, Serialize};
+use serde_json::value;
+
+/// Response is using for non-stream response
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
+pub struct RerankerResponse {
+ raw_response: value::Value,
+}
+
+impl RerankerResponse {
+ pub fn new(raw_response: value::Value) -> Self {
+ RerankerResponse { raw_response }
+ }
+
+ pub fn get_raw_response(&self) -> &value::Value {
+ &self.raw_response
+ }
+
+ pub fn get(&self, key: &str) -> Option<&value::Value> {
+ self.raw_response.get(key)
+ }
+
+ pub fn get_mut(&mut self, key: &str) -> Option<&mut value::Value> {
+ self.raw_response.get_mut(key)
+ }
+
+ /// get the result of reranker response
+ pub fn get_reranker_response(&self) -> Result<Vec<RerankData>, ErnieError> {
+ match self.raw_response.get("results") {
+ Some(data) => {
+ let data_array = data
+ .as_array()
+ .ok_or(ErnieError::GetResponseError(
+ "reranker results is not an array".to_string(),
+ ))?
+ .clone();
+ let results = data_array
+ .into_iter()
+ .map(|x| {
+ serde_json::from_value(x)
+ .map_err(|e| ErnieError::GetResponseError(e.to_string()))
+ })
+ .collect::<Result<Vec<RerankData>, ErnieError>>()?;
+ Ok(results)
+ }
+ None => Err(ErnieError::GetResponseError(
+ "reranker results is not found".to_string(),
+ )),
+ }
+ }
+ /// get tokens used by prompt
+ pub fn get_prompt_tokens(&self) -> Option<u64> {
+ let usage = self.get("usage")?.as_object()?;
+ let prompt_tokens = usage.get("prompt_tokens")?.as_u64()?;
+ Some(prompt_tokens)
+ }
+ /// get tokens used by completion
+ pub fn get_total_tokens(&self) -> Option<u64> {
+ let usage = self.get("usage")?.as_object()?;
+ let total_tokens = usage.get("total_tokens")?.as_u64()?;
+ Some(total_tokens)
+ }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
+pub struct RerankData {
+ document: String,
+ relevance_score: f64,
+ index: u64,
+}