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434 lines
14 KiB
Rust
434 lines
14 KiB
Rust
use super::access_token::*;
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use super::*;
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use anyhow::{anyhow, bail, Context, Result};
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use async_trait::async_trait;
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use chrono::{Duration, Utc};
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use reqwest::{Client as ReqwestClient, RequestBuilder};
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use serde::Deserialize;
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use serde_json::{json, Value};
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use std::path::PathBuf;
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#[derive(Debug, Clone, Deserialize, Default)]
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pub struct VertexAIConfig {
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pub name: Option<String>,
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pub project_id: Option<String>,
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pub location: Option<String>,
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pub adc_file: Option<String>,
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#[serde(default)]
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pub models: Vec<ModelData>,
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pub patches: Option<ModelPatches>,
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pub extra: Option<ExtraConfig>,
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}
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impl VertexAIClient {
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config_get_fn!(project_id, get_project_id);
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config_get_fn!(location, get_location);
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pub const PROMPTS: [PromptAction<'static>; 2] = [
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("project_id", "Project ID", true, PromptKind::String),
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("location", "Location", true, PromptKind::String),
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];
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fn chat_completions_builder(
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&self,
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client: &ReqwestClient,
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data: ChatCompletionsData,
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) -> Result<RequestBuilder> {
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let project_id = self.get_project_id()?;
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let location = self.get_location()?;
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let access_token = get_access_token(self.name())?;
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let base_url = format!("https://{location}-aiplatform.googleapis.com/v1/projects/{project_id}/locations/{location}/publishers");
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let func = match data.stream {
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true => "streamGenerateContent",
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false => "generateContent",
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};
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let url = format!("{base_url}/google/models/{}:{func}", self.model.name());
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let mut body = gemini_build_chat_completions_body(data, &self.model)?;
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self.patch_chat_completions_body(&mut body);
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debug!("VertexAI Chat Completions Request: {url} {body}");
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let builder = client.post(url).bearer_auth(access_token).json(&body);
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Ok(builder)
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}
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fn embeddings_builder(
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&self,
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client: &ReqwestClient,
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data: EmbeddingsData,
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) -> Result<RequestBuilder> {
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let project_id = self.get_project_id()?;
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let location = self.get_location()?;
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let access_token = get_access_token(self.name())?;
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let base_url = format!("https://{location}-aiplatform.googleapis.com/v1/projects/{project_id}/locations/{location}/publishers");
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let url = format!("{base_url}/google/models/{}:predict", self.model.name());
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let task_type = match data.query {
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true => "RETRIEVAL_DOCUMENT",
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false => "QUESTION_ANSWERING",
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};
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let instances: Vec<_> = data
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.texts
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.into_iter()
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.map(|v| json!({"task_type": task_type, "content": v}))
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.collect();
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let body = json!({
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"instances": instances,
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});
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debug!("VertexAI Embeddings Request: {url} {body}");
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let builder = client.post(url).bearer_auth(access_token).json(&body);
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Ok(builder)
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}
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}
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#[async_trait]
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impl Client for VertexAIClient {
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client_common_fns!();
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async fn chat_completions_inner(
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&self,
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client: &ReqwestClient,
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data: ChatCompletionsData,
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) -> Result<ChatCompletionsOutput> {
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prepare_gcloud_access_token(client, self.name(), &self.config.adc_file).await?;
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let builder = self.chat_completions_builder(client, data)?;
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gemini_chat_completions(builder).await
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}
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async fn chat_completions_streaming_inner(
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&self,
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client: &ReqwestClient,
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handler: &mut SseHandler,
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data: ChatCompletionsData,
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) -> Result<()> {
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prepare_gcloud_access_token(client, self.name(), &self.config.adc_file).await?;
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let builder = self.chat_completions_builder(client, data)?;
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gemini_chat_completions_streaming(builder, handler).await
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}
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async fn embeddings_inner(
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&self,
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client: &ReqwestClient,
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data: EmbeddingsData,
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) -> Result<Vec<Vec<f32>>> {
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prepare_gcloud_access_token(client, self.name(), &self.config.adc_file).await?;
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let builder = self.embeddings_builder(client, data)?;
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embeddings(builder).await
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}
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}
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pub async fn gemini_chat_completions(builder: RequestBuilder) -> Result<ChatCompletionsOutput> {
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let res = builder.send().await?;
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let status = res.status();
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let data: Value = res.json().await?;
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if !status.is_success() {
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catch_error(&data, status.as_u16())?;
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}
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debug!("non-stream-data: {data}");
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gemini_extract_chat_completions_text(&data)
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}
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pub async fn gemini_chat_completions_streaming(
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builder: RequestBuilder,
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handler: &mut SseHandler,
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) -> Result<()> {
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let res = builder.send().await?;
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let status = res.status();
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if !status.is_success() {
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let data: Value = res.json().await?;
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catch_error(&data, status.as_u16())?;
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} else {
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let handle = |value: &str| -> Result<()> {
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let data: Value = serde_json::from_str(value)?;
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debug!("stream-data: {data}");
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if let Some(text) = data["candidates"][0]["content"]["parts"][0]["text"].as_str() {
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if !text.is_empty() {
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handler.text(text)?;
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}
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} else if let Some("SAFETY") = data["promptFeedback"]["blockReason"]
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.as_str()
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.or_else(|| data["candidates"][0]["finishReason"].as_str())
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{
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bail!("Content Blocked")
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} else if let Some(parts) = data["candidates"][0]["content"]["parts"].as_array() {
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for part in parts {
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if let (Some(name), Some(args)) = (
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part["functionCall"]["name"].as_str(),
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part["functionCall"]["args"].as_object(),
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) {
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handler.tool_call(ToolCall::new(name.to_string(), json!(args), None))?;
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}
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}
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}
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Ok(())
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};
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json_stream(res.bytes_stream(), handle).await?;
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}
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Ok(())
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}
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async fn embeddings(builder: RequestBuilder) -> Result<EmbeddingsOutput> {
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let res = builder.send().await?;
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let status = res.status();
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let data: Value = res.json().await?;
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if !status.is_success() {
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catch_error(&data, status.as_u16())?;
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}
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let res_body: EmbeddingsResBody =
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serde_json::from_value(data).context("Invalid request data")?;
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let output = res_body
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.predictions
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.into_iter()
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.map(|v| v.embeddings.values)
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.collect();
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Ok(output)
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}
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#[derive(Deserialize)]
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struct EmbeddingsResBody {
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predictions: Vec<EmbeddingsResBodyPrediction>,
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}
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#[derive(Deserialize)]
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struct EmbeddingsResBodyPrediction {
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embeddings: EmbeddingsResBodyPredictionEmbeddings,
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}
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#[derive(Deserialize)]
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struct EmbeddingsResBodyPredictionEmbeddings {
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values: Vec<f32>,
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}
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fn gemini_extract_chat_completions_text(data: &Value) -> Result<ChatCompletionsOutput> {
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let text = data["candidates"][0]["content"]["parts"][0]["text"]
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.as_str()
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.unwrap_or_default();
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let mut tool_calls = vec![];
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if let Some(parts) = data["candidates"][0]["content"]["parts"].as_array() {
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tool_calls = parts
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.iter()
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.filter_map(|part| {
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if let (Some(name), Some(args)) = (
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part["functionCall"]["name"].as_str(),
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part["functionCall"]["args"].as_object(),
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) {
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Some(ToolCall::new(name.to_string(), json!(args), None))
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} else {
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None
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}
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})
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.collect()
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}
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if text.is_empty() && tool_calls.is_empty() {
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if let Some("SAFETY") = data["promptFeedback"]["blockReason"]
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.as_str()
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.or_else(|| data["candidates"][0]["finishReason"].as_str())
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{
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bail!("Content Blocked")
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} else {
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bail!("Invalid response data: {data}");
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}
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}
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let output = ChatCompletionsOutput {
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text: text.to_string(),
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tool_calls,
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id: None,
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input_tokens: data["usageMetadata"]["promptTokenCount"].as_u64(),
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output_tokens: data["usageMetadata"]["candidatesTokenCount"].as_u64(),
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};
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Ok(output)
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}
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pub fn gemini_build_chat_completions_body(
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data: ChatCompletionsData,
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model: &Model,
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) -> Result<Value> {
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let ChatCompletionsData {
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mut messages,
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temperature,
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top_p,
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functions,
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stream: _,
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} = data;
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patch_system_message(&mut messages);
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let mut network_image_urls = vec![];
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let contents: Vec<Value> = messages
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.into_iter()
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.flat_map(|message| {
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let Message { role, content } = message;
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let role = match role {
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MessageRole::User => "user",
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_ => "model",
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};
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match content {
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MessageContent::Text(text) => vec![json!({
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"role": role,
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"parts": [{ "text": text }]
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})],
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MessageContent::Array(list) => {
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let parts: Vec<Value> = list
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.into_iter()
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.map(|item| match item {
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MessageContentPart::Text { text } => json!({"text": text}),
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MessageContentPart::ImageUrl { image_url: ImageUrl { url } } => {
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if let Some((mime_type, data)) = url.strip_prefix("data:").and_then(|v| v.split_once(";base64,")) {
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json!({ "inline_data": { "mime_type": mime_type, "data": data } })
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} else {
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network_image_urls.push(url.clone());
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json!({ "url": url })
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}
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},
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})
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.collect();
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vec![json!({ "role": role, "parts": parts })]
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},
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MessageContent::ToolResults((tool_call_results, _)) => {
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let function_call_parts: Vec<Value> = tool_call_results.iter().map(|tool_call_result| {
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json!({
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"functionCall": {
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"name": tool_call_result.call.name,
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"args": tool_call_result.call.arguments,
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}
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})
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}).collect();
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let function_response_parts: Vec<Value> = tool_call_results.into_iter().map(|tool_call_result| {
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json!({
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"functionResponse": {
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"name": tool_call_result.call.name,
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"response": {
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"name": tool_call_result.call.name,
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"content": tool_call_result.output,
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}
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}
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})
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}).collect();
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vec![
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json!({ "role": "model", "parts": function_call_parts }),
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json!({ "role": "function", "parts": function_response_parts }),
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]
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}
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}
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})
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.collect();
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if !network_image_urls.is_empty() {
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bail!(
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"The model does not support network images: {:?}",
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network_image_urls
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);
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}
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let mut body = json!({ "contents": contents, "generationConfig": {} });
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if let Some(v) = model.max_tokens_param() {
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body["generationConfig"]["maxOutputTokens"] = v.into();
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}
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if let Some(v) = temperature {
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body["generationConfig"]["temperature"] = v.into();
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}
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if let Some(v) = top_p {
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body["generationConfig"]["topP"] = v.into();
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}
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if let Some(functions) = functions {
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body["tools"] = json!([{ "functionDeclarations": *functions }]);
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}
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Ok(body)
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}
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pub async fn prepare_gcloud_access_token(
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client: &reqwest::Client,
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client_name: &str,
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adc_file: &Option<String>,
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) -> Result<()> {
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if !is_valid_access_token(client_name) {
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let (token, expires_in) = fetch_access_token(client, adc_file)
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.await
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.with_context(|| "Failed to fetch access token")?;
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let expires_at = Utc::now()
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+ Duration::try_seconds(expires_in)
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.ok_or_else(|| anyhow!("Failed to parse expires_in of access_token"))?;
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set_access_token(client_name, token, expires_at.timestamp())
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}
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Ok(())
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}
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async fn fetch_access_token(
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client: &reqwest::Client,
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file: &Option<String>,
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) -> Result<(String, i64)> {
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let credentials = load_adc(file).await?;
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let value: Value = client
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.post("https://oauth2.googleapis.com/token")
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.json(&credentials)
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.send()
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.await?
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.json()
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.await?;
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if let (Some(access_token), Some(expires_in)) =
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(value["access_token"].as_str(), value["expires_in"].as_i64())
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{
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Ok((access_token.to_string(), expires_in))
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} else if let Some(err_msg) = value["error_description"].as_str() {
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bail!("{err_msg}")
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} else {
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bail!("Invalid response data: {value}")
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}
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}
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async fn load_adc(file: &Option<String>) -> Result<Value> {
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let adc_file = file
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.as_ref()
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.map(PathBuf::from)
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.or_else(default_adc_file)
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.ok_or_else(|| anyhow!("No application_default_credentials.json"))?;
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let data = tokio::fs::read_to_string(adc_file).await?;
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let data: Value = serde_json::from_str(&data)?;
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if let (Some(client_id), Some(client_secret), Some(refresh_token)) = (
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data["client_id"].as_str(),
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data["client_secret"].as_str(),
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data["refresh_token"].as_str(),
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) {
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Ok(json!({
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"client_id": client_id,
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"client_secret": client_secret,
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"refresh_token": refresh_token,
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"grant_type": "refresh_token",
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}))
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} else {
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bail!("Invalid application_default_credentials.json")
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}
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}
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#[cfg(not(windows))]
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fn default_adc_file() -> Option<PathBuf> {
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let mut path = dirs::home_dir()?;
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path.push(".config");
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path.push("gcloud");
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path.push("application_default_credentials.json");
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Some(path)
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}
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#[cfg(windows)]
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fn default_adc_file() -> Option<PathBuf> {
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let mut path = dirs::config_dir()?;
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path.push("gcloud");
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path.push("application_default_credentials.json");
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Some(path)
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}
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