kode_bridge/
http_client.rs

1use crate::buffer_pool::global_pools;
2use crate::errors::{KodeBridgeError, Result};
3use crate::parser_cache::global_parser_cache;
4use bytes::Bytes;
5use http::{header, HeaderMap, HeaderName, HeaderValue, Method, StatusCode, Version};
6use serde::{de::DeserializeOwned, Serialize};
7use serde_json::Value;
8use std::collections::HashMap;
9use std::str::FromStr;
10use std::time::Duration;
11use tokio::io::{AsyncBufReadExt, AsyncReadExt, AsyncWriteExt, BufReader};
12use tokio::io::{AsyncRead, AsyncWrite};
13use tracing::{debug, trace};
14
15/// Enhanced HTTP response with rich functionality
16#[derive(Debug, Clone)]
17pub struct Response {
18    status: StatusCode,
19    version: Version,
20    headers: HeaderMap,
21    body: Bytes,
22}
23
24impl Response {
25    pub fn new(status: StatusCode, version: Version, headers: HeaderMap, body: Bytes) -> Self {
26        Self {
27            status,
28            version,
29            headers,
30            body,
31        }
32    }
33
34    /// Get HTTP status code
35    pub fn status(&self) -> StatusCode {
36        self.status
37    }
38
39    /// Get status code as u16
40    pub fn status_code(&self) -> u16 {
41        self.status.as_u16()
42    }
43
44    /// Get HTTP version
45    pub fn version(&self) -> Version {
46        self.version
47    }
48
49    /// Get response headers
50    pub fn headers(&self) -> &HeaderMap {
51        &self.headers
52    }
53
54    /// Get response body as bytes
55    pub fn body(&self) -> &Bytes {
56        &self.body
57    }
58
59    /// Get response body as string
60    pub fn text(&self) -> Result<String> {
61        String::from_utf8(self.body.to_vec()).map_err(KodeBridgeError::from)
62    }
63
64    /// Parse response body as JSON
65    pub fn json<T>(&self) -> Result<T>
66    where
67        T: DeserializeOwned,
68    {
69        serde_json::from_slice(&self.body).map_err(KodeBridgeError::from)
70    }
71
72    /// Parse response body as generic JSON value
73    pub fn json_value(&self) -> Result<Value> {
74        serde_json::from_slice(&self.body).map_err(KodeBridgeError::from)
75    }
76
77    /// Check if response indicates success (2xx status)
78    pub fn is_success(&self) -> bool {
79        self.status.is_success()
80    }
81
82    /// Check if response indicates client error (4xx status)
83    pub fn is_client_error(&self) -> bool {
84        self.status.is_client_error()
85    }
86
87    /// Check if response indicates server error (5xx status)
88    pub fn is_server_error(&self) -> bool {
89        self.status.is_server_error()
90    }
91
92    /// Check if response indicates redirection (3xx status)
93    pub fn is_redirection(&self) -> bool {
94        self.status.is_redirection()
95    }
96
97    /// Get content length from headers
98    pub fn content_length(&self) -> Option<u64> {
99        self.headers
100            .get(header::CONTENT_LENGTH)?
101            .to_str()
102            .ok()?
103            .parse()
104            .ok()
105    }
106
107    /// Get content type from headers
108    pub fn content_type(&self) -> Option<&str> {
109        self.headers.get(header::CONTENT_TYPE)?.to_str().ok()
110    }
111
112    /// Convert to legacy Response format for backward compatibility
113    pub fn to_legacy(&self) -> crate::response::LegacyResponse {
114        let headers_map: HashMap<String, String> = self
115            .headers
116            .iter()
117            .map(|(k, v)| (k.to_string(), v.to_str().unwrap_or("").to_string()))
118            .collect();
119
120        crate::response::LegacyResponse {
121            status: self.status.as_u16(),
122            headers: serde_json::to_value(headers_map).unwrap_or(Value::Null),
123            body: String::from_utf8_lossy(&self.body).to_string(),
124        }
125    }
126}
127
128/// HTTP request builder with fluent interface
129#[derive(Debug)]
130pub struct RequestBuilder {
131    method: Method,
132    uri: String,
133    headers: HeaderMap,
134    body: Option<Bytes>,
135}
136
137impl RequestBuilder {
138    pub fn new(method: Method, uri: String) -> Self {
139        let mut headers = HeaderMap::new();
140        headers.insert(header::HOST, HeaderValue::from_static("localhost"));
141        headers.insert(
142            header::USER_AGENT,
143            HeaderValue::from_static("kode-bridge/0.1"),
144        );
145
146        Self {
147            method,
148            uri,
149            headers,
150            body: None,
151        }
152    }
153
154    /// Set JSON body with optimized serialization
155    pub fn json<T>(mut self, body: &T) -> Result<Self>
156    where
157        T: Serialize,
158    {
159        // 使用全局缓冲池来减少内存分配
160        let mut buffer = global_pools().get_medium();
161
162        // 直接序列化到缓冲区，避免中间Vec分配
163        serde_json::to_writer(buffer.as_mut_vec(), body)?;
164
165        self.headers.insert(
166            header::CONTENT_TYPE,
167            HeaderValue::from_static("application/json"),
168        );
169
170        // 避免字符串分配，直接使用itoa
171        let content_length = buffer.len().to_string();
172        self.headers.insert(
173            header::CONTENT_LENGTH,
174            HeaderValue::from_str(&content_length).map_err(|e| KodeBridgeError::Http(e.into()))?,
175        );
176
177        // 零拷贝转换到Bytes
178        self.body = Some(Bytes::copy_from_slice(&buffer));
179        Ok(self)
180    }
181
182    /// Build the HTTP request as bytes with optimized allocation
183    pub fn build(self) -> Result<Bytes> {
184        // 预估请求大小以选择合适的缓冲区
185        let estimated_size = 200 + // 基础头部大小
186            self.body.as_ref().map(|b| b.len()).unwrap_or(0);
187
188        let mut request = if estimated_size > 8192 {
189            global_pools().get_large()
190        } else {
191            global_pools().get_medium()
192        };
193
194        // Request line - 使用更高效的写入方式
195        request.extend_from_slice(self.method.as_str().as_bytes());
196        request.extend_from_slice(b" ");
197        request.extend_from_slice(self.uri.as_bytes());
198        request.extend_from_slice(b" HTTP/1.1\r\n");
199
200        // Headers - 批量写入减少系统调用
201        let mut headers_buffer = Vec::with_capacity(512);
202        for (key, value) in &self.headers {
203            headers_buffer.extend_from_slice(key.as_str().as_bytes());
204            headers_buffer.extend_from_slice(b": ");
205            headers_buffer.extend_from_slice(value.as_bytes());
206            headers_buffer.extend_from_slice(b"\r\n");
207        }
208        request.extend_from_slice(&headers_buffer);
209
210        // End of headers
211        request.extend_from_slice(b"\r\n");
212
213        // Body
214        if let Some(body) = self.body {
215            request.extend_from_slice(&body);
216        }
217
218        Ok(Bytes::copy_from_slice(&request))
219    }
220}
221
222/// Parse HTTP response from a stream with optimized parsing
223pub async fn parse_response<S>(stream: S) -> Result<Response>
224where
225    S: AsyncRead + Unpin,
226{
227    let mut reader = BufReader::new(stream);
228
229    // 使用预分配的缓冲区避免多次分配
230    let mut headers_buffer = global_pools().get_medium();
231
232    // 先读取状态行
233    let mut status_line = String::new();
234    reader.read_line(&mut status_line).await?;
235    headers_buffer.extend_from_slice(status_line.as_bytes());
236
237    // 读取HTTP头部直到遇到空行
238    let mut line = String::new();
239    loop {
240        line.clear();
241        let bytes_read = reader.read_line(&mut line).await?;
242        if bytes_read == 0 {
243            break;
244        }
245
246        // 检查是否是头部结束（空行）
247        if line == "\r\n" || line == "\n" {
248            break;
249        }
250
251        // 将头部行添加到缓冲区
252        headers_buffer.extend_from_slice(line.as_bytes());
253    }
254
255    // 添加最后的 \r\n 来标记头部结束
256    headers_buffer.extend_from_slice(b"\r\n");
257
258    // Use cached parser for better performance
259    let mut parser = global_parser_cache().get();
260    let (status, parsed_headers) = parser
261        .parse_response(&headers_buffer)
262        .map_err(|e| match e {
263            httparse::Error::TooManyHeaders => {
264                KodeBridgeError::protocol("Too many HTTP headers in response (limit: 64)")
265            }
266            _ => KodeBridgeError::protocol(format!("Failed to parse HTTP response: {:?}", e)),
267        })?;
268
269    // Build HeaderMap
270    let mut header_map = HeaderMap::new();
271    for (name, value) in parsed_headers {
272        let header_name =
273            HeaderName::from_str(&name).map_err(|e| KodeBridgeError::Http(e.into()))?;
274        let header_value =
275            HeaderValue::from_str(&value).map_err(|e| KodeBridgeError::Http(e.into()))?;
276        header_map.insert(header_name, header_value);
277    }
278
279    // Determine body length
280    let content_length = header_map
281        .get(header::CONTENT_LENGTH)
282        .and_then(|v| v.to_str().ok())
283        .and_then(|s| s.parse::<usize>().ok());
284
285    let is_chunked = header_map
286        .get(header::TRANSFER_ENCODING)
287        .and_then(|v| v.to_str().ok())
288        .map(|s| s.eq_ignore_ascii_case("chunked"))
289        .unwrap_or(false);
290
291    // Read body with optimized handling for empty responses (common in PUT/POST)
292    let body = if is_chunked {
293        read_chunked_body(&mut reader).await?
294    } else if let Some(len) = content_length {
295        if len == 0 {
296            // Empty response, return directly - optimize for PUT responses
297            Bytes::new()
298        } else if len > 10 * 1024 * 1024 {
299            // Use streaming for very large responses (>10MB)
300            return Err(KodeBridgeError::protocol(
301                "Response body too large for memory",
302            ));
303        } else {
304            read_fixed_body(&mut reader, len).await?
305        }
306    } else {
307        // For responses without Content-Length, use adaptive reading with shorter timeouts for PUT
308        read_until_end_adaptive(&mut reader).await?
309    };
310
311    Ok(Response::new(
312        StatusCode::from_u16(status)?,
313        Version::HTTP_11,
314        header_map,
315        body,
316    ))
317}
318
319async fn read_chunked_body<R>(reader: &mut BufReader<R>) -> Result<Bytes>
320where
321    R: AsyncRead + Unpin,
322{
323    let mut body_buffer = global_pools().get_large(); // 开始就使用大缓冲区
324
325    loop {
326        // Read chunk size line
327        let mut size_line = String::new();
328        reader.read_line(&mut size_line).await?;
329
330        let size_line = size_line.trim();
331        if size_line.is_empty() {
332            continue;
333        }
334
335        // Parse chunk size (hex)
336        let chunk_size = usize::from_str_radix(size_line, 16)
337            .map_err(|_| KodeBridgeError::protocol("Invalid chunk size"))?;
338
339        if chunk_size == 0 {
340            // Last chunk, read final CRLF
341            let mut final_line = String::new();
342            reader.read_line(&mut final_line).await?;
343            break;
344        }
345
346        // 对大块数据使用更大的缓冲区
347        if chunk_size > 65536 && body_buffer.capacity() < 131072 {
348            // 如果遇到大块，升级到更大的缓冲区
349            let mut larger_buffer = global_pools().get_extra_large();
350            larger_buffer.extend_from_slice(&body_buffer);
351            body_buffer = larger_buffer;
352        }
353
354        // Read chunk data
355        let mut chunk = vec![0u8; chunk_size];
356        reader.read_exact(&mut chunk).await?;
357        body_buffer.extend_from_slice(&chunk);
358
359        // Read trailing CRLF
360        let mut crlf = [0u8; 2];
361        reader.read_exact(&mut crlf).await?;
362
363        // 安全限制 - 针对PUT请求增加到20MB
364        if body_buffer.len() > 20 * 1024 * 1024 {
365            return Err(KodeBridgeError::protocol("Chunked response body too large"));
366        }
367    }
368
369    Ok(Bytes::copy_from_slice(body_buffer.as_slice()))
370}
371
372async fn read_fixed_body<R>(reader: &mut BufReader<R>, len: usize) -> Result<Bytes>
373where
374    R: AsyncRead + Unpin,
375{
376    let mut body = vec![0u8; len];
377    reader.read_exact(&mut body).await?;
378    Ok(Bytes::from(body))
379}
380
381async fn read_until_end_adaptive<R>(reader: &mut BufReader<R>) -> Result<Bytes>
382where
383    R: AsyncRead + Unpin,
384{
385    let mut body_buffer = global_pools().get_medium(); // 从中等缓冲区开始
386    let mut read_buffer = [0u8; 8192]; // 增加读缓冲区大小
387    let mut consecutive_empty_reads = 0;
388
389    loop {
390        // 使用更短的超时时间，更快地检测结束
391        let timeout_duration = Duration::from_millis(50 + (consecutive_empty_reads * 25).min(200));
392
393        match tokio::time::timeout(timeout_duration, reader.read(&mut read_buffer)).await {
394            Ok(Ok(0)) => {
395                // EOF reached
396                break;
397            }
398            Ok(Ok(n)) => {
399                // 如果数据量大，自动升级缓冲区
400                if body_buffer.len() + n > body_buffer.capacity() * 3 / 4
401                    && body_buffer.capacity() < 131072
402                {
403                    let mut larger_buffer = if body_buffer.capacity() < 16384 {
404                        global_pools().get_large()
405                    } else {
406                        global_pools().get_extra_large()
407                    };
408                    larger_buffer.extend_from_slice(&body_buffer);
409                    body_buffer = larger_buffer;
410                }
411
412                body_buffer.extend_from_slice(&read_buffer[..n]);
413                consecutive_empty_reads = 0;
414            }
415            Ok(Err(e)) => {
416                return Err(KodeBridgeError::from(e));
417            }
418            Err(_) => {
419                // Timeout occurred
420                consecutive_empty_reads += 1;
421                if consecutive_empty_reads >= 2 {
422                    // 减少到2次连续超时就结束，提高响应速度
423                    break;
424                }
425                continue;
426            }
427        }
428
429        // Safety limit to prevent unbounded memory usage - 增加到20MB
430        if body_buffer.len() > 20 * 1024 * 1024 {
431            return Err(KodeBridgeError::protocol("Response body too large"));
432        }
433    }
434
435    // Convert pooled buffer to Bytes for return
436    Ok(Bytes::copy_from_slice(body_buffer.as_slice()))
437}
438
439/// Send HTTP request and parse response
440pub async fn send_request<S>(mut stream: S, request: Bytes) -> Result<Response>
441where
442    S: AsyncRead + AsyncWrite + Unpin,
443{
444    // Send request
445    stream.write_all(&request).await?;
446    stream.flush().await?;
447
448    trace!("Sent HTTP request ({} bytes)", request.len());
449
450    // Parse response
451    let response = parse_response(stream).await?;
452
453    debug!(
454        "Received HTTP response: {} {}",
455        response.status(),
456        response.content_length().unwrap_or(0)
457    );
458
459    Ok(response)
460}
kode_bridge/http_client.rs

kode_bridge/
http_client.rs
