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 as _;
10use std::time::Duration;
11use tokio::io::{AsyncBufReadExt as _, AsyncReadExt as _, AsyncWriteExt as _, 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 const 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 const fn status(&self) -> StatusCode {
36        self.status
37    }
38
39    /// Get status code as u16
40    pub const fn status_code(&self) -> u16 {
41        self.status.as_u16()
42    }
43
44    /// Get HTTP version
45    pub const fn version(&self) -> Version {
46        self.version
47    }
48
49    /// Get response headers
50    pub const fn headers(&self) -> &HeaderMap {
51        &self.headers
52    }
53
54    /// Get response body as bytes
55    pub const 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(header::USER_AGENT, HeaderValue::from_static("kode-bridge/0.1"));
142
143        Self {
144            method,
145            uri,
146            headers,
147            body: None,
148        }
149    }
150
151    /// Add a custom header
152    pub fn header(mut self, key: &str, value: &str) -> Self {
153        if let (Ok(name), Ok(val)) = (HeaderName::from_bytes(key.as_bytes()), HeaderValue::from_str(value)) {
154            self.headers.insert(name, val);
155        }
156        self
157    }
158
159    /// Set JSON body with optimized serialization
160    pub fn json<T>(mut self, body: &T) -> Result<Self>
161    where
162        T: Serialize,
163    {
164        // 使用全局缓冲池来减少内存分配
165        let mut buffer = global_pools().get_medium();
166
167        // 直接序列化到缓冲区，避免中间Vec分配
168        serde_json::to_writer(buffer.as_mut_vec(), body)?;
169
170        self.headers
171            .insert(header::CONTENT_TYPE, HeaderValue::from_static("application/json"));
172
173        // 避免字符串分配，直接使用itoa
174        let content_length = buffer.len().to_string();
175        self.headers.insert(
176            header::CONTENT_LENGTH,
177            HeaderValue::from_str(&content_length).map_err(|e| KodeBridgeError::Http(e.into()))?,
178        );
179
180        // 零拷贝转换到Bytes
181        self.body = Some(Bytes::copy_from_slice(&buffer));
182        Ok(self)
183    }
184
185    /// Build the HTTP request as bytes with optimized allocation
186    pub fn build(self) -> Result<Bytes> {
187        // 预估请求大小以选择合适的缓冲区
188        let estimated_size = 200 + // 基础头部大小
189            self.body.as_ref().map(|b| b.len()).unwrap_or(0);
190
191        let mut request = if estimated_size > 8192 {
192            global_pools().get_large()
193        } else {
194            global_pools().get_medium()
195        };
196
197        // Request line - 使用更高效的写入方式
198        request.extend_from_slice(self.method.as_str().as_bytes());
199        request.extend_from_slice(b" ");
200        request.extend_from_slice(self.uri.as_bytes());
201        request.extend_from_slice(b" HTTP/1.1\r\n");
202
203        // Headers - 批量写入减少系统调用
204        let mut headers_buffer = Vec::with_capacity(512);
205        for (key, value) in &self.headers {
206            headers_buffer.extend_from_slice(key.as_str().as_bytes());
207            headers_buffer.extend_from_slice(b": ");
208            headers_buffer.extend_from_slice(value.as_bytes());
209            headers_buffer.extend_from_slice(b"\r\n");
210        }
211        request.extend_from_slice(&headers_buffer);
212
213        // End of headers
214        request.extend_from_slice(b"\r\n");
215
216        // Body
217        if let Some(body) = self.body {
218            request.extend_from_slice(&body);
219        }
220
221        Ok(Bytes::copy_from_slice(&request))
222    }
223}
224
225/// Parse HTTP response from a stream with optimized parsing
226pub async fn parse_response<S>(stream: S) -> Result<Response>
227where
228    S: AsyncRead + Unpin + Send,
229{
230    let mut reader = BufReader::new(stream);
231
232    // 使用预分配的缓冲区避免多次分配
233    let mut headers_buffer = global_pools().get_medium();
234
235    // 先读取状态行
236    let mut status_line = String::new();
237    reader.read_line(&mut status_line).await?;
238    headers_buffer.extend_from_slice(status_line.as_bytes());
239
240    // 读取HTTP头部直到遇到空行
241    let mut line = String::new();
242    loop {
243        line.clear();
244        let bytes_read = reader.read_line(&mut line).await?;
245        if bytes_read == 0 {
246            break;
247        }
248
249        // 检查是否是头部结束（空行）
250        if line == "\r\n" || line == "\n" {
251            break;
252        }
253
254        // 将头部行添加到缓冲区
255        headers_buffer.extend_from_slice(line.as_bytes());
256    }
257
258    // 添加最后的 \r\n 来标记头部结束
259    headers_buffer.extend_from_slice(b"\r\n");
260
261    // Use cached parser for better performance
262    let mut parser = global_parser_cache().get();
263    let (status, parsed_headers) = parser
264        .parse_response(&headers_buffer)
265        .map_err(|e| match e {
266            httparse::Error::TooManyHeaders => {
267                KodeBridgeError::protocol("Too many HTTP headers in response (limit: 64)")
268            }
269            _ => KodeBridgeError::protocol(format!("Failed to parse HTTP response: {:?}", e)),
270        })?;
271
272    // Build HeaderMap
273    let mut header_map = HeaderMap::new();
274    for (name, value) in parsed_headers {
275        let header_name = HeaderName::from_str(&name).map_err(|e| KodeBridgeError::Http(e.into()))?;
276        let header_value = HeaderValue::from_str(&value).map_err(|e| KodeBridgeError::Http(e.into()))?;
277        header_map.insert(header_name, header_value);
278    }
279
280    // Determine body length
281    let content_length = header_map
282        .get(header::CONTENT_LENGTH)
283        .and_then(|v| v.to_str().ok())
284        .and_then(|s| s.parse::<usize>().ok());
285
286    let is_chunked = header_map
287        .get(header::TRANSFER_ENCODING)
288        .and_then(|v| v.to_str().ok())
289        .map(|s| s.eq_ignore_ascii_case("chunked"))
290        .unwrap_or(false);
291
292    // Read body with optimized handling for empty responses (common in PUT/POST)
293    let body = if is_chunked {
294        read_chunked_body(&mut reader).await?
295    } else if let Some(len) = content_length {
296        if len == 0 {
297            // Empty response, return directly - optimize for PUT responses
298            Bytes::new()
299        } else if len > 10 * 1024 * 1024 {
300            // Use streaming for very large responses (>10MB)
301            return Err(KodeBridgeError::protocol("Response body too large for memory"));
302        } else {
303            read_fixed_body(&mut reader, len).await?
304        }
305    } else {
306        // For responses without Content-Length, use adaptive reading with shorter timeouts for PUT
307        read_until_end_adaptive(&mut reader).await?
308    };
309
310    Ok(Response::new(
311        StatusCode::from_u16(status)?,
312        Version::HTTP_11,
313        header_map,
314        body,
315    ))
316}
317
318async fn read_chunked_body<R>(reader: &mut BufReader<R>) -> Result<Bytes>
319where
320    R: AsyncRead + Unpin + Send,
321{
322    let mut body_buffer = global_pools().get_large(); // 开始就使用大缓冲区
323
324    loop {
325        // Read chunk size line
326        let mut size_line = String::new();
327        reader.read_line(&mut size_line).await?;
328
329        let size_line = size_line.trim();
330        if size_line.is_empty() {
331            continue;
332        }
333
334        // Parse chunk size (hex)
335        let chunk_size =
336            usize::from_str_radix(size_line, 16).map_err(|_| KodeBridgeError::protocol("Invalid chunk size"))?;
337
338        if chunk_size == 0 {
339            // Last chunk, read final CRLF
340            let mut final_line = String::new();
341            reader.read_line(&mut final_line).await?;
342            break;
343        }
344
345        // 对大块数据使用更大的缓冲区
346        if chunk_size > 65536 && body_buffer.capacity() < 131072 {
347            // 如果遇到大块，升级到更大的缓冲区
348            let mut larger_buffer = global_pools().get_extra_large();
349            larger_buffer.extend_from_slice(&body_buffer);
350            body_buffer = larger_buffer;
351        }
352
353        // Read chunk data
354        let mut chunk = vec![0u8; chunk_size];
355        reader.read_exact(&mut chunk).await?;
356        body_buffer.extend_from_slice(&chunk);
357
358        // Read trailing CRLF
359        let mut crlf = [0u8; 2];
360        reader.read_exact(&mut crlf).await?;
361
362        // 安全限制 - 针对PUT请求增加到20MB
363        if body_buffer.len() > 20 * 1024 * 1024 {
364            return Err(KodeBridgeError::protocol("Chunked response body too large"));
365        }
366    }
367
368    Ok(Bytes::copy_from_slice(body_buffer.as_slice()))
369}
370
371async fn read_fixed_body<R>(reader: &mut BufReader<R>, len: usize) -> Result<Bytes>
372where
373    R: AsyncRead + Unpin + Send,
374{
375    let mut body = vec![0u8; len];
376    reader.read_exact(&mut body).await?;
377    Ok(Bytes::from(body))
378}
379
380async fn read_until_end_adaptive<R>(reader: &mut BufReader<R>) -> Result<Bytes>
381where
382    R: AsyncRead + Unpin + Send,
383{
384    let mut body_buffer = global_pools().get_medium();
385    let mut read_buffer = [0u8; 512];
386    let mut consecutive_empty_reads = 0;
387
388    loop {
389        let timeout_duration = Duration::from_millis(50 + (consecutive_empty_reads * 25));
390
391        match tokio::time::timeout(timeout_duration, reader.read(&mut read_buffer)).await {
392            Ok(Ok(0)) => {
393                // EOF reached
394                break;
395            }
396            Ok(Ok(n)) => {
397                // 如果数据量大，自动升级缓冲区
398                if body_buffer.len() + n > body_buffer.capacity() * 3 / 4 && body_buffer.capacity() < 131072 {
399                    let mut larger_buffer = if body_buffer.capacity() < 16384 {
400                        global_pools().get_large()
401                    } else {
402                        global_pools().get_extra_large()
403                    };
404                    larger_buffer.extend_from_slice(&body_buffer);
405                    body_buffer = larger_buffer;
406                }
407
408                body_buffer.extend_from_slice(&read_buffer[..n]);
409                consecutive_empty_reads = 0;
410            }
411            Ok(Err(e)) => {
412                return Err(KodeBridgeError::from(e));
413            }
414            Err(_) => {
415                // Timeout occurred
416                consecutive_empty_reads += 1;
417                if consecutive_empty_reads >= 2 {
418                    // 减少到2次连续超时就结束，提高响应速度
419                    break;
420                }
421                continue;
422            }
423        }
424
425        // Safety limit to prevent unbounded memory usage - 增加到20MB
426        if body_buffer.len() > 20 * 1024 * 1024 {
427            return Err(KodeBridgeError::protocol("Response body too large"));
428        }
429    }
430
431    // Convert pooled buffer to Bytes for return
432    Ok(Bytes::copy_from_slice(body_buffer.as_slice()))
433}
434
435/// Send HTTP request and parse response
436pub async fn send_request<S>(mut stream: S, request: Bytes) -> Result<Response>
437where
438    S: AsyncRead + AsyncWrite + Unpin + Send,
439{
440    // Send request
441    stream.write_all(&request).await?;
442    stream.flush().await?;
443
444    trace!("Sent HTTP request ({} bytes)", request.len());
445
446    // Parse response
447    let response = parse_response(stream).await?;
448
449    debug!(
450        "Received HTTP response: {} {}",
451        response.status(),
452        response.content_length().unwrap_or(0)
453    );
454
455    Ok(response)
456}
kode_bridge/http_client.rs

kode_bridge/
http_client.rs
