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use crate::{
app::{
constant::{
AUTHORIZATION_BEARER_PREFIX, FINISH_REASON_STOP, OBJECT_CHAT_COMPLETION,
OBJECT_CHAT_COMPLETION_CHUNK,
},
lazy::{AUTH_TOKEN, KEY_PREFIX, KEY_PREFIX_LEN, REQUEST_LOGS_LIMIT, SERVICE_TIMEOUT},
model::{
AppConfig, AppState, ChatRequest, LogStatus, RequestLog, TimingInfo, TokenInfo,
UsageCheck,
},
},
chat::{
config::KeyConfig,
constant::{AVAILABLE_MODELS, USAGE_CHECK_MODELS},
error::StreamError,
model::{
ChatResponse, Choice, Delta, Message, MessageContent, ModelsResponse, Role, Usage,
},
stream::{StreamDecoder, StreamMessage},
},
common::{
client::build_client,
model::{error::ChatError, userinfo::MembershipType, ApiStatus, ErrorResponse},
utils::{
format_time_ms, from_base64, get_token_profile, tokeninfo_to_token,
validate_token_and_checksum, TrimNewlines as _,
},
},
};
use axum::{
body::Body,
extract::State,
http::{
header::{AUTHORIZATION, CONTENT_TYPE},
HeaderMap, StatusCode,
},
response::Response,
Json,
};
use bytes::Bytes;
use futures::StreamExt;
use prost::Message as _;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::{
convert::Infallible,
sync::{atomic::AtomicBool, Arc},
};
use tokio::sync::Mutex;
use uuid::Uuid;
// 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();
let is_search = request.model.ends_with("-online");
let model_name = if is_search {
request.model[..request.model.len() - 7].to_string()
} else {
request.model.clone()
};
// 验证模型是否支持并获取模型信息
let model = AVAILABLE_MODELS.iter().find(|m| m.id == model_name);
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()),
// ))?;
let auth_header = AUTH_TOKEN.as_str();
let mut current_config = KeyConfig::new_with_global();
// 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()
|| (AppConfig::is_share() && token == AppConfig::get_share_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())
}
token if AppConfig::get_dynamic_key() && token.starts_with(&*KEY_PREFIX) => {
from_base64(&token[*KEY_PREFIX_LEN..])
.and_then(|decoded_bytes| KeyConfig::decode(&decoded_bytes[..]).ok())
.and_then(|key_config| {
key_config.copy_without_auth_token(&mut current_config);
key_config.auth_token
})
.and_then(|token_info| tokeninfo_to_token(&token_info))
.ok_or((
StatusCode::UNAUTHORIZED,
Json(ChatError::Unauthorized.to_json()),
))?
}
// 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_config = current_config;
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(&model_name.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(UsageCheck::from_proto(
current_config.usage_check_models.as_ref(),
))
})
.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;
// 先找到所有需要更新的位置的索引
let token_info_idx = state
.token_infos
.iter()
.position(|info| info.token == auth_token_clone);
let log_idx = state.request_logs.iter().rposition(|log| log.id == log_id);
// 根据索引更新
match (token_info_idx, log_idx) {
(Some(t_idx), Some(l_idx)) => {
state.token_infos[t_idx].profile = profile.clone();
state.request_logs[l_idx].token_info.profile = profile;
}
(Some(t_idx), None) => {
state.token_infos[t_idx].profile = profile;
}
(None, Some(l_idx)) => {
state.request_logs[l_idx].token_info.profile = profile;
}
(None, None) => {}
}
});
}
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: LogStatus::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,
&model_name,
current_config.disable_vision(),
current_config.enable_slow_pool(),
is_search,
)
.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 = LogStatus::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, &checksum, is_search);
// 添加超时设置
let response = tokio::time::timeout(
std::time::Duration::from_secs(*SERVICE_TIMEOUT),
client.body(hex_data).send(),
)
.await;
// 处理请求结果
let response = match response {
Ok(inner_response) => match inner_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 = LogStatus::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 = LogStatus::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()),
));
}
},
Err(_) => {
// 处理超时错误
{
let mut state = state.lock().await;
if let Some(log) = state
.request_logs
.iter_mut()
.rev()
.find(|log| log.id == current_id)
{
log.status = LogStatus::Failed;
log.error = Some("Request timeout".to_string());
}
state.active_requests -= 1;
state.error_requests += 1;
}
return Err((
StatusCode::GATEWAY_TIMEOUT,
Json(ChatError::RequestFailed("Request timeout".to_string()).to_json()),
));
}
};
// 释放活动请求计数
{
let mut state = state.lock().await;
state.active_requests -= 1;
}
let convert_web_ref = current_config.include_web_references();
if request.stream {
let response_id = format!("chatcmpl-{}", Uuid::new_v4().simple());
let is_start = Arc::new(AtomicBool::new(true));
let start_time = std::time::Instant::now();
let first_chunk_time = Arc::new(Mutex::new(None::<f64>));
let decoder = Arc::new(Mutex::new(StreamDecoder::new()));
// 定义消息处理器的上下文结构体
struct MessageProcessContext<'a> {
response_id: &'a str,
model: &'a str,
is_start: &'a AtomicBool,
first_chunk_time: &'a Mutex<Option<f64>>,
start_time: std::time::Instant,
state: &'a Mutex<AppState>,
current_id: u64,
}
// 处理消息并生成响应数据的辅助函数
async fn process_messages(
messages: Vec<StreamMessage>,
ctx: &MessageProcessContext<'_>,
) -> String {
let mut response_data = String::new();
for message in messages {
match message {
StreamMessage::Content(text) => {
let is_first = ctx.is_start.load(Ordering::SeqCst);
if is_first {
if let Ok(mut first_time) = ctx.first_chunk_time.try_lock() {
*first_time = Some(ctx.start_time.elapsed().as_secs_f64());
}
}
let response = ChatResponse {
id: ctx.response_id.to_string(),
object: OBJECT_CHAT_COMPLETION_CHUNK.to_string(),
created: chrono::Utc::now().timestamp(),
model: if is_first {
Some(ctx.model.to_string())
} else {
None
},
choices: vec![Choice {
index: 0,
message: None,
delta: Some(Delta {
role: if is_first {
Some(Role::Assistant)
} else {
None
},
content: if is_first {
ctx.is_start.store(false, Ordering::SeqCst);
Some(text.trim_leading_newlines())
} else {
Some(text)
},
}),
finish_reason: None,
}],
usage: None,
};
response_data.push_str(&format!(
"data: {}\n\n",
serde_json::to_string(&response).unwrap()
));
}
StreamMessage::StreamEnd => {
// 计算总时间和首次片段时间
let total_time = ctx.start_time.elapsed().as_secs_f64();
let first_time = ctx.first_chunk_time.lock().await.unwrap_or(total_time);
{
let mut state = ctx.state.lock().await;
if let Some(log) = state
.request_logs
.iter_mut()
.rev()
.find(|log| log.id == ctx.current_id)
{
log.timing.total = format_time_ms(total_time);
log.timing.first = Some(format_time_ms(first_time));
}
}
let response = ChatResponse {
id: ctx.response_id.to_string(),
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,
};
response_data.push_str(&format!(
"data: {}\n\ndata: [DONE]\n\n",
serde_json::to_string(&response).unwrap()
));
}
StreamMessage::Debug(debug_prompt) => {
if let Ok(mut state) = ctx.state.try_lock() {
if let Some(log) = state
.request_logs
.iter_mut()
.rev()
.find(|log| log.id == ctx.current_id)
{
log.prompt = Some(debug_prompt);
}
}
}
_ => {} // 忽略其他消息类型
}
}
response_data
}
// 首先处理stream直到获得第一个结果
let mut stream = response.bytes_stream();
while !decoder.lock().await.is_first_result_ready() {
match stream.next().await {
Some(Ok(chunk)) => {
if let Err(StreamError::ChatError(error)) =
decoder.lock().await.decode(&chunk, convert_web_ref)
{
let error_response = 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 = LogStatus::Failed;
log.error = Some(error_response.native_code());
log.timing.total =
format_time_ms(start_time.elapsed().as_secs_f64());
state.error_requests += 1;
}
}
return Err((
error_response.status_code(),
Json(error_response.to_common()),
));
}
}
Some(Err(e)) => {
let error_message = format!("Failed to read response chunk: {}", e);
return Err((
StatusCode::INTERNAL_SERVER_ERROR,
Json(ChatError::RequestFailed(error_message).to_json()),
));
}
None => {
// 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 = LogStatus::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(),
),
));
}
}
}
// 处理后续的stream
let stream = stream.then({
let decoder = decoder.clone();
let response_id = response_id.clone();
let model = request.model.clone();
let is_start = is_start.clone();
let first_chunk_time = first_chunk_time.clone();
let state = state.clone();
move |chunk| {
let decoder = decoder.clone();
let response_id = response_id.clone();
let model = model.clone();
let is_start = is_start.clone();
let first_chunk_time = first_chunk_time.clone();
let state = state.clone();
async move {
let chunk = chunk.unwrap_or_default();
let ctx = MessageProcessContext {
response_id: &response_id,
model: &model,
is_start: &is_start,
first_chunk_time: &first_chunk_time,
start_time,
state: &state,
current_id,
};
// 使用decoder处理chunk
let messages = match decoder.lock().await.decode(&chunk, convert_web_ref) {
Ok(msgs) => msgs,
Err(e) => {
eprintln!("[警告] Stream error: {}", e);
return Ok::<_, Infallible>(Bytes::new());
}
};
let mut response_data = String::new();
if let Some(first_msg) = decoder.lock().await.take_first_result() {
let first_response = process_messages(first_msg, &ctx).await;
response_data.push_str(&first_response);
}
let current_response = process_messages(messages, &ctx).await;
if !current_response.is_empty() {
response_data.push_str(¤t_response);
}
Ok(Bytes::from(response_data))
}
}
});
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_time = None::<f64>;
let mut decoder = StreamDecoder::new();
let mut full_text = String::with_capacity(1024);
let mut stream = response.bytes_stream();
// 逐个处理chunks
while let Some(chunk) = stream.next().await {
let chunk = chunk.map_err(|e| {
let error_message = format!("Failed to read response chunk: {}", e);
(
StatusCode::INTERNAL_SERVER_ERROR,
Json(ChatError::RequestFailed(error_message).to_json()),
)
})?;
// 立即处理当前chunk
match decoder.decode(&chunk, convert_web_ref) {
Ok(messages) => {
for message in messages {
match message {
StreamMessage::Content(text) => {
if first_chunk_time.is_none() {
first_chunk_time = Some(start_time.elapsed().as_secs_f64());
}
full_text.push_str(&text);
}
StreamMessage::Debug(debug_prompt) => {
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.prompt = Some(debug_prompt);
}
}
}
_ => {}
}
}
}
Err(StreamError::ChatError(error)) => {
let error_response = error.to_error_response();
return Err((
error_response.status_code(),
Json(error_response.to_common()),
));
}
Err(e) => {
let error_response = ErrorResponse {
status: ApiStatus::Error,
code: Some(500),
error: Some(e.to_string()),
message: None,
};
return Err((StatusCode::INTERNAL_SERVER_ERROR, Json(error_response)));
}
}
}
// 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 = LogStatus::Failed;
log.error = Some("Empty response received".to_string());
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.trim_leading_newlines()),
}),
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 = first_chunk_time;
log.status = LogStatus::Success;
}
}
Ok(Response::builder()
.header(CONTENT_TYPE, "application/json")
.body(Body::from(serde_json::to_string(&response_data).unwrap()))
.unwrap())
}
}
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