kode_bridge/
http_client.rs

1use crate::errors::{KodeBridgeError, Result};
2use crate::parser_cache::global_parser_cache;
3use bytes::{BufMut as _, Bytes, BytesMut};
4use http::{header, HeaderMap, HeaderName, HeaderValue, Method, StatusCode, Version};
5use serde::{de::DeserializeOwned, Serialize};
6use serde_json::Value;
7use std::collections::HashMap;
8use std::str::FromStr as _;
9use std::time::Duration;
10use tokio::io::{AsyncBufReadExt as _, AsyncReadExt as _, AsyncWriteExt as _, BufReader};
11use tokio::io::{AsyncRead, AsyncWrite};
12use tracing::{debug, trace};
13
14/// Enhanced HTTP response with rich functionality
15#[derive(Debug, Clone)]
16pub struct Response {
17    status: StatusCode,
18    version: Version,
19    headers: HeaderMap,
20    body: Bytes,
21}
22
23impl Response {
24    pub const fn new(status: StatusCode, version: Version, headers: HeaderMap, body: Bytes) -> Self {
25        Self {
26            status,
27            version,
28            headers,
29            body,
30        }
31    }
32
33    /// Get HTTP status code
34    pub const fn status(&self) -> StatusCode {
35        self.status
36    }
37
38    /// Get status code as u16
39    pub const fn status_code(&self) -> u16 {
40        self.status.as_u16()
41    }
42
43    /// Get HTTP version
44    pub const fn version(&self) -> Version {
45        self.version
46    }
47
48    /// Get response headers
49    pub const fn headers(&self) -> &HeaderMap {
50        &self.headers
51    }
52
53    /// Get response body as bytes
54    pub const fn body(&self) -> &Bytes {
55        &self.body
56    }
57
58    /// Get response body as string
59    pub fn text(&self) -> Result<String> {
60        String::from_utf8(self.body.to_vec()).map_err(KodeBridgeError::from)
61    }
62
63    /// Parse response body as JSON
64    pub fn json<T>(&self) -> Result<T>
65    where
66        T: DeserializeOwned,
67    {
68        serde_json::from_slice(&self.body).map_err(KodeBridgeError::from)
69    }
70
71    /// Parse response body as generic JSON value
72    pub fn json_value(&self) -> Result<Value> {
73        serde_json::from_slice(&self.body).map_err(KodeBridgeError::from)
74    }
75
76    /// Check if response indicates success (2xx status)
77    pub fn is_success(&self) -> bool {
78        self.status.is_success()
79    }
80
81    /// Check if response indicates client error (4xx status)
82    pub fn is_client_error(&self) -> bool {
83        self.status.is_client_error()
84    }
85
86    /// Check if response indicates server error (5xx status)
87    pub fn is_server_error(&self) -> bool {
88        self.status.is_server_error()
89    }
90
91    /// Check if response indicates redirection (3xx status)
92    pub fn is_redirection(&self) -> bool {
93        self.status.is_redirection()
94    }
95
96    /// Get content length from headers
97    pub fn content_length(&self) -> Option<u64> {
98        self.headers
99            .get(header::CONTENT_LENGTH)?
100            .to_str()
101            .ok()?
102            .parse()
103            .ok()
104    }
105
106    /// Get content type from headers
107    pub fn content_type(&self) -> Option<&str> {
108        self.headers.get(header::CONTENT_TYPE)?.to_str().ok()
109    }
110
111    /// Convert to legacy Response format for backward compatibility
112    pub fn to_legacy(&self) -> crate::response::LegacyResponse {
113        let headers_map: HashMap<String, String> = self
114            .headers
115            .iter()
116            .map(|(k, v)| (k.to_string(), v.to_str().unwrap_or("").to_string()))
117            .collect();
118
119        crate::response::LegacyResponse {
120            status: self.status.as_u16(),
121            headers: serde_json::to_value(headers_map).unwrap_or(Value::Null),
122            body: String::from_utf8_lossy(&self.body).to_string(),
123        }
124    }
125}
126
127/// HTTP request builder with fluent interface
128#[derive(Debug)]
129pub struct RequestBuilder {
130    method: Method,
131    uri: String,
132    headers: HeaderMap,
133    body: Option<Bytes>,
134}
135
136impl RequestBuilder {
137    pub fn new(method: Method, uri: String) -> Self {
138        let mut headers = HeaderMap::new();
139        headers.insert(header::HOST, HeaderValue::from_static("localhost"));
140        headers.insert(header::USER_AGENT, HeaderValue::from_static("kode-bridge/0.1"));
141
142        Self {
143            method,
144            uri,
145            headers,
146            body: None,
147        }
148    }
149
150    /// Add a custom header
151    pub fn header(mut self, key: &str, value: &str) -> Self {
152        if let (Ok(name), Ok(val)) = (HeaderName::from_bytes(key.as_bytes()), HeaderValue::from_str(value)) {
153            self.headers.insert(name, val);
154        }
155        self
156    }
157
158    /// Set JSON body with optimized serialization
159    pub fn json<T>(mut self, body: &T) -> Result<Self>
160    where
161        T: Serialize,
162    {
163        let mut buffer = BytesMut::with_capacity(1024);
164        {
165            let writer = (&mut buffer).writer();
166            serde_json::to_writer(writer, body).map_err(KodeBridgeError::from)?;
167        }
168
169        self.headers
170            .insert(header::CONTENT_TYPE, HeaderValue::from_static("application/json"));
171
172        let content_length = buffer.len().to_string();
173        self.headers.insert(
174            header::CONTENT_LENGTH,
175            HeaderValue::from_str(&content_length).map_err(|e| KodeBridgeError::Http(e.into()))?,
176        );
177
178        self.body = Some(buffer.freeze());
179        Ok(self)
180    }
181
182    /// Build the HTTP request as bytes with optimized allocation
183    pub fn build(self) -> Result<Bytes> {
184        let mut request = BytesMut::with_capacity(1024 + self.body.as_ref().map(|b| b.len()).unwrap_or(0));
185
186        // Request line - 使用更高效的写入方式
187        request.extend_from_slice(self.method.as_str().as_bytes());
188        request.extend_from_slice(b" ");
189        request.extend_from_slice(self.uri.as_bytes());
190        request.extend_from_slice(b" HTTP/1.1\r\n");
191
192        // Headers - 批量写入减少系统调用
193        let mut headers_buffer = BytesMut::with_capacity(512);
194        for (key, value) in &self.headers {
195            headers_buffer.extend_from_slice(key.as_str().as_bytes());
196            headers_buffer.extend_from_slice(b": ");
197            headers_buffer.extend_from_slice(value.as_bytes());
198            headers_buffer.extend_from_slice(b"\r\n");
199        }
200        request.extend_from_slice(&headers_buffer);
201
202        // End of headers
203        request.extend_from_slice(b"\r\n");
204
205        // Body
206        if let Some(body) = self.body {
207            request.extend_from_slice(&body);
208        }
209
210        Ok(request.freeze())
211    }
212}
213
214/// Parse HTTP response from a stream with optimized parsing
215pub async fn parse_response<S>(stream: S) -> Result<Response>
216where
217    S: AsyncRead + Unpin + Send,
218{
219    let mut reader = BufReader::new(stream);
220
221    // 使用预分配的缓冲区避免多次分配
222    let mut headers_buffer = BytesMut::with_capacity(1024);
223
224    // 先读取状态行
225    let mut status_line = String::new();
226    reader.read_line(&mut status_line).await?;
227    headers_buffer.extend_from_slice(status_line.as_bytes());
228
229    // 读取HTTP头部直到遇到空行
230    let mut line = String::new();
231    loop {
232        line.clear();
233        let bytes_read = reader.read_line(&mut line).await?;
234        if bytes_read == 0 {
235            break;
236        }
237
238        // 检查是否是头部结束（空行）
239        if line == "\r\n" || line == "\n" {
240            break;
241        }
242
243        // 将头部行添加到缓冲区
244        headers_buffer.extend_from_slice(line.as_bytes());
245    }
246
247    // 添加最后的 \r\n 来标记头部结束
248    headers_buffer.extend_from_slice(b"\r\n");
249
250    // Use cached parser for better performance
251    let mut parser = global_parser_cache().get();
252    let (status, parsed_headers) = parser
253        .parse_response(&headers_buffer)
254        .map_err(|e| match e {
255            httparse::Error::TooManyHeaders => {
256                KodeBridgeError::protocol("Too many HTTP headers in response (limit: 64)")
257            }
258            _ => KodeBridgeError::protocol(format!("Failed to parse HTTP response: {:?}", e)),
259        })?;
260
261    // Build HeaderMap
262    let mut header_map = HeaderMap::new();
263    for (name, value) in parsed_headers {
264        let header_name = HeaderName::from_str(&name).map_err(|e| KodeBridgeError::Http(e.into()))?;
265        let header_value = HeaderValue::from_str(&value).map_err(|e| KodeBridgeError::Http(e.into()))?;
266        header_map.insert(header_name, header_value);
267    }
268
269    // Determine body length
270    let content_length = header_map
271        .get(header::CONTENT_LENGTH)
272        .and_then(|v| v.to_str().ok())
273        .and_then(|s| s.parse::<usize>().ok());
274
275    let is_chunked = header_map
276        .get(header::TRANSFER_ENCODING)
277        .and_then(|v| v.to_str().ok())
278        .map(|s| s.eq_ignore_ascii_case("chunked"))
279        .unwrap_or(false);
280
281    // Read body with optimized handling for empty responses (common in PUT/POST)
282    let body = if is_chunked {
283        read_chunked_body(&mut reader).await?
284    } else if let Some(len) = content_length {
285        if len == 0 {
286            // Empty response, return directly - optimize for PUT responses
287            Bytes::new()
288        } else if len > 10 * 1024 * 1024 {
289            // Use streaming for very large responses (>10MB)
290            return Err(KodeBridgeError::protocol("Response body too large for memory"));
291        } else {
292            read_fixed_body(&mut reader, len).await?
293        }
294    } else {
295        // For responses without Content-Length, use adaptive reading with shorter timeouts for PUT
296        read_until_end_adaptive(&mut reader).await?
297    };
298
299    Ok(Response::new(
300        StatusCode::from_u16(status)?,
301        Version::HTTP_11,
302        header_map,
303        body,
304    ))
305}
306
307async fn read_chunked_body<R>(reader: &mut BufReader<R>) -> Result<Bytes>
308where
309    R: AsyncRead + Unpin + Send,
310{
311    let mut body_buffer = BytesMut::with_capacity(8192);
312
313    loop {
314        // Read chunk size line
315        let mut size_line = String::new();
316        reader.read_line(&mut size_line).await?;
317
318        let size_line = size_line.trim();
319        if size_line.is_empty() {
320            continue;
321        }
322
323        // Parse chunk size (hex)
324        let chunk_size =
325            usize::from_str_radix(size_line, 16).map_err(|_| KodeBridgeError::protocol("Invalid chunk size"))?;
326
327        if chunk_size == 0 {
328            // Last chunk, read final CRLF
329            let mut final_line = String::new();
330            reader.read_line(&mut final_line).await?;
331            break;
332        }
333
334        // Read chunk data
335        let mut chunk = vec![0u8; chunk_size];
336        reader.read_exact(&mut chunk).await?;
337        body_buffer.extend_from_slice(&chunk);
338
339        // Read trailing CRLF
340        let mut crlf = [0u8; 2];
341        reader.read_exact(&mut crlf).await?;
342    }
343
344    Ok(body_buffer.freeze())
345}
346
347async fn read_fixed_body<R>(reader: &mut BufReader<R>, len: usize) -> Result<Bytes>
348where
349    R: AsyncRead + Unpin + Send,
350{
351    let mut body = vec![0u8; len];
352    reader.read_exact(&mut body).await?;
353    Ok(Bytes::from(body))
354}
355
356async fn read_until_end_adaptive<R>(reader: &mut BufReader<R>) -> Result<Bytes>
357where
358    R: AsyncRead + Unpin + Send,
359{
360    let mut body_buffer = BytesMut::with_capacity(8192);
361    let mut read_buffer = [0u8; 512];
362    let mut consecutive_empty_reads = 0;
363
364    loop {
365        let timeout_duration = Duration::from_millis(25 + (consecutive_empty_reads * 25));
366
367        match tokio::time::timeout(timeout_duration, reader.read(&mut read_buffer)).await {
368            Ok(Ok(0)) => {
369                // EOF reached
370                break;
371            }
372            Ok(Ok(n)) => {
373                body_buffer.extend_from_slice(&read_buffer[..n]);
374                consecutive_empty_reads = 0;
375            }
376            Ok(Err(e)) => {
377                return Err(KodeBridgeError::from(e));
378            }
379            Err(_) => {
380                // Timeout occurred
381                consecutive_empty_reads += 1;
382                if consecutive_empty_reads >= 2 {
383                    // 减少到2次连续超时就结束，提高响应速度
384                    break;
385                }
386                continue;
387            }
388        }
389
390        // Safety limit to prevent unbounded memory usage - 增加到20MB
391        if body_buffer.len() > 20 * 1024 * 1024 {
392            return Err(KodeBridgeError::protocol("Response body too large"));
393        }
394    }
395
396    // Convert pooled buffer to Bytes for return
397    Ok(body_buffer.freeze())
398}
399
400/// Send HTTP request and parse response
401pub async fn send_request<S>(mut stream: S, request: Bytes) -> Result<Response>
402where
403    S: AsyncRead + AsyncWrite + Unpin + Send,
404{
405    // Send request
406    stream.write_all(&request).await?;
407    stream.flush().await?;
408
409    trace!("Sent HTTP request ({} bytes)", request.len());
410
411    // Parse response
412    let response = parse_response(stream).await?;
413
414    debug!(
415        "Received HTTP response: {} {}",
416        response.status(),
417        response.content_length().unwrap_or(0)
418    );
419
420    Ok(response)
421}
kode_bridge/http_client.rs

kode_bridge/
http_client.rs
