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use crate::{
app::{
constant::{
AUTHORIZATION_BEARER_PREFIX, FINISH_REASON_STOP, OBJECT_CHAT_COMPLETION,
OBJECT_CHAT_COMPLETION_CHUNK, STATUS_FAILED, STATUS_PENDING, STATUS_SUCCESS,
},
lazy::{AUTH_TOKEN, SHARED_AUTH_TOKEN, USE_SHARE},
model::{AppConfig, AppState, ChatRequest, RequestLog, TimingInfo, TokenInfo},
},
chat::{
constant::{AVAILABLE_MODELS, USAGE_CHECK_MODELS},
error::StreamError,
model::{
ChatResponse, Choice, Delta, Message, MessageContent, ModelsResponse, Role, Usage,
},
stream::{parse_stream_data, StreamMessage},
},
common::{
client::build_client,
models::{error::ChatError, userinfo::MembershipType, ErrorResponse},
utils::{format_time_ms, generate_checksum_with_repair, get_token_profile, validate_token_and_checksum},
},
};
use axum::{
body::Body,
extract::State,
http::{
header::{AUTHORIZATION, CONTENT_TYPE},
HeaderMap, StatusCode,
},
response::Response,
Json,
};
use bytes::Bytes;
use futures::{Stream, StreamExt};
use std::{
convert::Infallible,
sync::{atomic::AtomicBool, Arc},
};
use std::{
pin::Pin,
sync::atomic::{AtomicUsize, Ordering},
};
use tokio::sync::Mutex;
use uuid::Uuid;
const REQUEST_LOGS_LIMIT: usize = 1000;
// 模型列表处理
pub async fn handle_models() -> Json<ModelsResponse> {
Json(ModelsResponse {
object: "list",
data: &AVAILABLE_MODELS,
})
}
// 聊天处理函数的签名
pub async fn handle_chat(
State(state): State<Arc<Mutex<AppState>>>,
headers: HeaderMap,
Json(request): Json<ChatRequest>,
) -> Result<Response<Body>, (StatusCode, Json<ErrorResponse>)> {
let allow_claude = AppConfig::get_allow_claude();
// 验证模型是否支持并获取模型信息
let model = AVAILABLE_MODELS.iter().find(|m| m.id == request.model);
let model_supported = model.is_some();
if !(model_supported || allow_claude && request.model.starts_with("claude")) {
return Err((
StatusCode::BAD_REQUEST,
Json(ChatError::ModelNotSupported(request.model).to_json()),
));
}
let request_time = chrono::Local::now();
// 验证请求
if request.messages.is_empty() {
return Err((
StatusCode::BAD_REQUEST,
Json(ChatError::EmptyMessages.to_json()),
));
}
// 获取并处理认证令牌
let auth_header = headers
.get(AUTHORIZATION)
.and_then(|h| h.to_str().ok())
.and_then(|h| h.strip_prefix(AUTHORIZATION_BEARER_PREFIX))
.ok_or((
StatusCode::UNAUTHORIZED,
Json(ChatError::Unauthorized.to_json()),
))?;
// 验证认证token并获取token信息
let (auth_token, checksum) = match auth_header {
// 管理员Token验证逻辑
token if token == AUTH_TOKEN.as_str() || (*USE_SHARE && token == SHARED_AUTH_TOKEN.as_str()) => {
static CURRENT_KEY_INDEX: AtomicUsize = AtomicUsize::new(0);
let state_guard = state.lock().await;
let token_infos = &state_guard.token_infos;
// 检查是否存在可用的token
if token_infos.is_empty() {
return Err((
StatusCode::SERVICE_UNAVAILABLE,
Json(ChatError::NoTokens.to_json()),
));
}
// 轮询选择token
let index = CURRENT_KEY_INDEX.fetch_add(1, Ordering::SeqCst) % token_infos.len();
let token_info = &token_infos[index];
(token_info.token.clone(), token_info.checksum.clone())
},
// 普通用户Token验证逻辑
token => validate_token_and_checksum(token).ok_or((
StatusCode::UNAUTHORIZED,
Json(ChatError::Unauthorized.to_json()),
))?,
};
let current_id: u64;
// 更新请求日志
{
let state_clone = state.clone();
let mut state = state.lock().await;
state.total_requests += 1;
state.active_requests += 1;
// 查找最新的相同token的日志,检查使用情况
let need_profile_check = state
.request_logs
.iter()
.rev()
.find(|log| log.token_info.token == auth_token && log.token_info.profile.is_some())
.and_then(|log| log.token_info.profile.as_ref())
.map(|profile| {
if profile.stripe.membership_type != MembershipType::Free {
return false;
}
let is_premium = USAGE_CHECK_MODELS.contains(&request.model.as_str());
let standard = &profile.usage.standard;
let premium = &profile.usage.premium;
if is_premium {
premium
.max_requests
.map_or(false, |max| premium.num_requests >= max)
} else {
standard
.max_requests
.map_or(false, |max| standard.num_requests >= max)
}
})
.unwrap_or(false);
// 如果达到限制,直接返回未授权错误
if need_profile_check {
state.active_requests -= 1;
state.error_requests += 1;
return Err((
StatusCode::UNAUTHORIZED,
Json(ChatError::Unauthorized.to_json()),
));
}
let next_id = state.request_logs.last().map_or(1, |log| log.id + 1);
current_id = next_id;
// 如果需要获取用户使用情况,创建后台任务获取profile
if model.map(|m| m.is_usage_check()).unwrap_or(false) {
let auth_token_clone = auth_token.clone();
let state_clone = state_clone.clone();
let log_id = next_id;
tokio::spawn(async move {
let profile = get_token_profile(&auth_token_clone).await;
let mut state = state_clone.lock().await;
// 根据id查找对应的日志
if let Some(log) = state
.request_logs
.iter_mut()
.rev()
.find(|log| log.id == log_id)
{
log.token_info.profile = profile;
}
});
}
state.request_logs.push(RequestLog {
id: next_id,
timestamp: request_time,
model: request.model.clone(),
token_info: TokenInfo {
token: auth_token.clone(),
checksum: checksum.clone(),
profile: None,
},
prompt: None,
timing: TimingInfo {
total: 0.0,
first: None,
},
stream: request.stream,
status: STATUS_PENDING,
error: None,
});
if state.request_logs.len() > REQUEST_LOGS_LIMIT {
state.request_logs.remove(0);
}
}
// 将消息转换为hex格式
let hex_data = match super::adapter::encode_chat_message(request.messages, &request.model).await
{
Ok(data) => data,
Err(e) => {
let mut state = state.lock().await;
if let Some(log) = state
.request_logs
.iter_mut()
.rev()
.find(|log| log.id == current_id)
{
log.status = STATUS_FAILED;
log.error = Some(e.to_string());
}
state.active_requests -= 1;
state.error_requests += 1;
return Err((
StatusCode::INTERNAL_SERVER_ERROR,
Json(
ChatError::RequestFailed("Failed to encode chat message".to_string()).to_json(),
),
));
}
};
// 构建请求客户端
let client = build_client(&auth_token, &generate_checksum_with_repair(&checksum));
let response = client.body(hex_data).send().await;
// 处理请求结果
let response = match response {
Ok(resp) => {
// 更新请求日志为成功
{
let mut state = state.lock().await;
if let Some(log) = state
.request_logs
.iter_mut()
.rev()
.find(|log| log.id == current_id)
{
log.status = STATUS_SUCCESS;
}
}
resp
}
Err(e) => {
// 更新请求日志为失败
{
let mut state = state.lock().await;
if let Some(log) = state
.request_logs
.iter_mut()
.rev()
.find(|log| log.id == current_id)
{
log.status = STATUS_FAILED;
log.error = Some(e.to_string());
}
state.active_requests -= 1;
state.error_requests += 1;
}
return Err((
StatusCode::INTERNAL_SERVER_ERROR,
Json(ChatError::RequestFailed(e.to_string()).to_json()),
));
}
};
// 释放活动请求计数
{
let mut state = state.lock().await;
state.active_requests -= 1;
}
if request.stream {
let response_id = format!("chatcmpl-{}", Uuid::new_v4().simple());
let full_text = Arc::new(Mutex::new(String::with_capacity(1024)));
let is_start = Arc::new(AtomicBool::new(true));
let start_time = std::time::Instant::now();
let first_chunk_time = Arc::new(Mutex::new(None));
let stream = {
// 创建新的 stream
let mut stream = response.bytes_stream();
let enable_stream_check = AppConfig::get_stream_check();
if enable_stream_check {
// 检查第一个 chunk
match stream.next().await {
Some(first_chunk) => {
let chunk = first_chunk.map_err(|e| {
let error_message = format!("Failed to read response chunk: {}", e);
// 理论上，若程序正常，必定成功，因为前面判断过了
(
StatusCode::INTERNAL_SERVER_ERROR,
Json(ChatError::RequestFailed(error_message).to_json()),
)
})?;
match parse_stream_data(&chunk) {
Err(StreamError::ChatError(error)) => {
let error_respone = error.to_error_response();
// 更新请求日志为失败
{
let mut state = state.lock().await;
if let Some(log) = state
.request_logs
.iter_mut()
.rev()
.find(|log| log.id == current_id)
{
log.status = STATUS_FAILED;
log.error = Some(error_respone.native_code());
log.timing.total =
format_time_ms(start_time.elapsed().as_secs_f64());
state.error_requests += 1;
}
}
return Err((
error_respone.status_code(),
Json(error_respone.to_common()),
));
}
Ok(_) | Err(_) => {
// 创建一个包含第一个 chunk 的 stream
Box::pin(
futures::stream::once(async move { Ok(chunk) }).chain(stream),
)
as Pin<
Box<
dyn Stream<Item = Result<Bytes, reqwest::Error>> + Send,
>,
>
}
}
}
None => {
// Box::pin(stream)
// as Pin<Box<dyn Stream<Item = Result<Bytes, reqwest::Error>> + Send>>
// 更新请求日志为失败
{
let mut state = state.lock().await;
if let Some(log) = state
.request_logs
.iter_mut()
.rev()
.find(|log| log.id == current_id)
{
log.status = STATUS_FAILED;
log.error = Some("Empty stream response".to_string());
state.error_requests += 1;
}
}
return Err((
StatusCode::INTERNAL_SERVER_ERROR,
Json(
ChatError::RequestFailed("Empty stream response".to_string())
.to_json(),
),
));
}
}
} else {
Box::pin(stream)
as Pin<Box<dyn Stream<Item = Result<Bytes, reqwest::Error>> + Send>>
}
}
.then({
let buffer = Arc::new(Mutex::new(Vec::new()));
let first_chunk_time = first_chunk_time.clone();
let state = state.clone();
move |chunk| {
let buffer = buffer.clone();
let response_id = response_id.clone();
let model = request.model.clone();
let is_start = is_start.clone();
let full_text = full_text.clone();
let first_chunk_time = first_chunk_time.clone();
let state = state.clone();
async move {
let chunk = chunk.unwrap_or_default();
let mut buffer_guard = buffer.lock().await;
buffer_guard.extend_from_slice(&chunk);
match parse_stream_data(&buffer_guard) {
Ok(StreamMessage::Content(texts)) => {
buffer_guard.clear();
let mut response_data = String::new();
// 记录首字时间(如果还未记录)
if let Ok(mut first_time) = first_chunk_time.try_lock() {
if first_time.is_none() {
*first_time =
Some(format_time_ms(start_time.elapsed().as_secs_f64()));
}
}
// 处理文本内容
for text in texts {
let mut text_guard = full_text.lock().await;
text_guard.push_str(&text);
let is_first = is_start.load(Ordering::SeqCst);
let response = ChatResponse {
id: response_id.clone(),
object: OBJECT_CHAT_COMPLETION_CHUNK.to_string(),
created: chrono::Utc::now().timestamp(),
model: if is_first { Some(model.clone()) } else { None },
choices: vec![Choice {
index: 0,
message: None,
delta: Some(Delta {
role: if is_first {
is_start.store(false, Ordering::SeqCst);
Some(Role::Assistant)
} else {
None
},
content: Some(text),
}),
finish_reason: None,
}],
usage: None,
};
response_data.push_str(&format!(
"data: {}\n\n",
serde_json::to_string(&response).unwrap()
));
}
Ok::<_, Infallible>(Bytes::from(response_data))
}
Ok(StreamMessage::StreamStart) => {
buffer_guard.clear();
// 发送初始响应，包含模型信息
let response = ChatResponse {
id: response_id.clone(),
object: OBJECT_CHAT_COMPLETION_CHUNK.to_string(),
created: chrono::Utc::now().timestamp(),
model: {
is_start.store(true, Ordering::SeqCst);
Some(model.clone())
},
choices: vec![Choice {
index: 0,
message: None,
delta: Some(Delta {
role: Some(Role::Assistant),
content: Some(String::new()),
}),
finish_reason: None,
}],
usage: None,
};
Ok(Bytes::from(format!(
"data: {}\n\n",
serde_json::to_string(&response).unwrap()
)))
}
Ok(StreamMessage::StreamEnd) => {
buffer_guard.clear();
// 根据配置决定是否发送最后的 finish_reason
let include_finish_reason = AppConfig::get_stop_stream();
// 计算总时间和首次片段时间
let total_time = format_time_ms(start_time.elapsed().as_secs_f64());
let first_time = first_chunk_time.lock().await.unwrap_or(total_time);
{
let mut state = state.lock().await;
if let Some(log) = state
.request_logs
.iter_mut()
.rev()
.find(|log| log.id == current_id)
{
log.timing.total = total_time;
log.timing.first = Some(first_time);
}
}
if include_finish_reason {
let response = ChatResponse {
id: response_id.clone(),
object: OBJECT_CHAT_COMPLETION_CHUNK.to_string(),
created: chrono::Utc::now().timestamp(),
model: None,
choices: vec![Choice {
index: 0,
message: None,
delta: Some(Delta {
role: None,
content: None,
}),
finish_reason: Some(FINISH_REASON_STOP.to_string()),
}],
usage: None,
};
Ok(Bytes::from(format!(
"data: {}\n\ndata: [DONE]\n\n",
serde_json::to_string(&response).unwrap()
)))
} else {
Ok(Bytes::from("data: [DONE]\n\n"))
}
}
Ok(StreamMessage::Incomplete) => {
// 保持buffer中的数据以待下一个chunk
Ok(Bytes::new())
}
Ok(StreamMessage::Debug(debug_prompt)) => {
buffer_guard.clear();
if let Ok(mut state) = state.try_lock() {
if let Some(last_log) = state.request_logs.last_mut() {
last_log.prompt = Some(debug_prompt.clone());
}
}
Ok(Bytes::new())
}
Err(e) => {
buffer_guard.clear();
eprintln!("[警告] Stream error: {}", e);
Ok(Bytes::new())
}
}
}
}
});
Ok(Response::builder()
.header("Cache-Control", "no-cache")
.header("Connection", "keep-alive")
.header(CONTENT_TYPE, "text/event-stream")
.body(Body::from_stream(stream))
.unwrap())
} else {
// 非流式响应
let start_time = std::time::Instant::now();
let mut first_chunk_received = false;
let mut first_chunk_time = 0.0;
let mut full_text = String::with_capacity(1024);
let mut stream = response.bytes_stream();
let mut prompt = None;
let mut buffer = Vec::new();
while let Some(chunk) = stream.next().await {
let chunk = chunk.map_err(|e| {
// 更新请求日志为失败
if let Ok(mut state) = state.try_lock() {
if let Some(log) = state
.request_logs
.iter_mut()
.rev()
.find(|log| log.id == current_id)
{
log.status = STATUS_FAILED;
log.error = Some(format!("Failed to read response chunk: {}", e));
state.error_requests += 1;
}
}
(
StatusCode::INTERNAL_SERVER_ERROR,
Json(
ChatError::RequestFailed(format!("Failed to read response chunk: {}", e))
.to_json(),
),
)
})?;
buffer.extend_from_slice(&chunk);
match parse_stream_data(&buffer) {
Ok(StreamMessage::Content(texts)) => {
if !first_chunk_received {
first_chunk_time = format_time_ms(start_time.elapsed().as_secs_f64());
first_chunk_received = true;
}
for text in texts {
full_text.push_str(&text);
}
buffer.clear();
}
Ok(StreamMessage::Incomplete) => continue,
Ok(StreamMessage::Debug(debug_prompt)) => {
prompt = Some(debug_prompt);
buffer.clear();
}
Ok(StreamMessage::StreamStart) | Ok(StreamMessage::StreamEnd) => {
buffer.clear();
}
Err(StreamError::ChatError(error)) => {
let error = error.to_error_response();
// 更新请求日志为失败
{
let mut state = state.lock().await;
if let Some(log) = state
.request_logs
.iter_mut()
.rev()
.find(|log| log.id == current_id)
{
log.status = STATUS_FAILED;
log.error = Some(error.native_code());
log.timing.total = format_time_ms(start_time.elapsed().as_secs_f64());
state.error_requests += 1;
}
}
return Err((error.status_code(), Json(error.to_common())));
}
Err(_) => {
buffer.clear();
continue;
}
}
}
// 检查响应是否为空
if full_text.is_empty() {
// 更新请求日志为失败
{
let mut state = state.lock().await;
if let Some(log) = state
.request_logs
.iter_mut()
.rev()
.find(|log| log.id == current_id)
{
log.status = STATUS_FAILED;
log.error = Some("Empty response received".to_string());
if let Some(p) = prompt {
log.prompt = Some(p);
}
state.error_requests += 1;
}
}
return Err((
StatusCode::INTERNAL_SERVER_ERROR,
Json(ChatError::RequestFailed("Empty response received".to_string()).to_json()),
));
}
let response_data = ChatResponse {
id: format!("chatcmpl-{}", Uuid::new_v4().simple()),
object: OBJECT_CHAT_COMPLETION.to_string(),
created: chrono::Utc::now().timestamp(),
model: Some(request.model),
choices: vec![Choice {
index: 0,
message: Some(Message {
role: Role::Assistant,
content: MessageContent::Text(full_text),
}),
delta: None,
finish_reason: Some(FINISH_REASON_STOP.to_string()),
}],
usage: Some(Usage {
prompt_tokens: 0,
completion_tokens: 0,
total_tokens: 0,
}),
};
{
// 更新请求日志时间信息和状态
let total_time = format_time_ms(start_time.elapsed().as_secs_f64());
let mut state = state.lock().await;
if let Some(log) = state
.request_logs
.iter_mut()
.rev()
.find(|log| log.id == current_id)
{
log.timing.total = total_time;
log.timing.first = Some(first_chunk_time);
log.prompt = prompt;
log.status = STATUS_SUCCESS;
}
}
Ok(Response::builder()
.header(CONTENT_TYPE, "application/json")
.body(Body::from(serde_json::to_string(&response_data).unwrap()))
.unwrap())
}
}
|