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feat: implement content filtering for non-streaming and improve streaming tail handling

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Co-authored-by: aider (openai/andrew/openrouter/deepseek/deepseek-chat-v3.1) <aider@aider.chat>
This commit is contained in:
Andrew Phillips
2025-08-28 18:22:28 -03:00
parent 1ded347355
commit c50a7db130
2 changed files with 203 additions and 35 deletions
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26
src/services/async_item_service.rs
View File

@@ -65,13 +65,35 @@ impl AsyncItemService {
.unwrap()
}
pub async fn get_item_content_info(&self, id: i64) -> Result<(Vec<u8>, String, bool), CoreError> {
pub async fn get_item_content_info(
&self,
id: i64,
head_bytes: Option<usize>,
head_words: Option<usize>,
head_lines: Option<usize>,
tail_bytes: Option<usize>,
tail_words: Option<usize>,
tail_lines: Option<usize>,
line_start: Option<usize>,
line_end: Option<usize>,
) -> Result<(Vec<u8>, String, bool), CoreError> {
let db = self.db.clone();
let item_service = self.item_service.clone();
tokio::task::spawn_blocking(move || {
let conn = db.blocking_lock();
item_service.get_item_content_info(&conn, id)
item_service.get_item_content_info(
&conn,
id,
head_bytes,
head_words,
head_lines,
tail_bytes,
tail_words,
tail_lines,
line_start,
line_end
)
})
.await
.unwrap()

210
src/services/item_service.rs
View File

@@ -82,12 +82,16 @@ impl ItemService {
let item_with_content = self.get_item_content(conn, id)?;
let mut content = item_with_content.content;
// Apply content filtering here
// This would process the content according to the parameters
// For now, we'll just return the full content
// Implement the actual filtering logic based on the parameters
let metadata = item_with_content.item_with_meta.meta_as_map();
// Apply content filtering
if head_bytes.is_some() || head_words.is_some() || head_lines.is_some() {
content = self.process_head(&content, head_bytes, head_words, head_lines);
} else if tail_bytes.is_some() || tail_words.is_some() || tail_lines.is_some() {
content = self.process_tail(&content, tail_bytes, tail_words, tail_lines);
} else if line_start.is_some() || line_end.is_some() {
content = self.process_line_range(&content, line_start, line_end);
}
let metadata = item_with_content.item_with_meta.meta_as_map();
let mime_type = metadata
.get("mime_type")
.map(|s| s.to_string())
@@ -97,10 +101,10 @@ impl ItemService {
let is_binary = if let Some(text_val) = metadata.get("text") {
text_val == "false"
} else {
crate::common::is_binary::is_binary(&item_with_content.content)
crate::common::is_binary::is_binary(&content)
};
Ok((item_with_content.content, mime_type, is_binary))
Ok((content, mime_type, is_binary))
}
pub fn get_item_content_info_streaming(
@@ -415,6 +419,132 @@ impl ItemService {
pub fn get_data_path(&self) -> &PathBuf {
&self.data_path
}
fn process_head(&self, content: &[u8], head_bytes: Option<usize>, head_words: Option<usize>, head_lines: Option<usize>) -> Vec<u8> {
let mut result = Vec::new();
let mut bytes_remaining = head_bytes;
let mut words_remaining = head_words;
let mut lines_remaining = head_lines;
let mut in_word = false;
for &byte in content {
// Check if any limits are reached
if bytes_remaining == Some(0) || words_remaining == Some(0) || lines_remaining == Some(0) {
break;
}
result.push(byte);
// Update bytes remaining
if let Some(remaining) = &mut bytes_remaining {
*remaining -= 1;
}
// Check for newlines
if let Some(remaining) = &mut lines_remaining {
if byte == b'\n' && *remaining > 0 {
*remaining -= 1;
}
}
// Check for words
if let Some(remaining) = &mut words_remaining {
let is_whitespace = byte.is_ascii_whitespace();
if in_word && is_whitespace {
in_word = false;
if *remaining > 0 {
*remaining -= 1;
}
} else if !is_whitespace {
in_word = true;
}
}
}
result
}
fn process_tail(&self, content: &[u8], tail_bytes: Option<usize>, tail_words: Option<usize>, tail_lines: Option<usize>) -> Vec<u8> {
// For simplicity, we'll process from the end
// This implementation may not be perfect for words and lines, but it's a start
let mut result = Vec::new();
if let Some(bytes) = tail_bytes {
let start = if content.len() > bytes { content.len() - bytes } else { 0 };
return content[start..].to_vec();
}
// For words and lines, we need to process from the end
// This is a simplified implementation
if let Some(lines) = tail_lines {
let mut line_count = 0;
let mut i = content.len();
while i > 0 {
i -= 1;
if content[i] == b'\n' {
line_count += 1;
if line_count == lines {
break;
}
}
}
return content[i..].to_vec();
}
if let Some(words) = tail_words {
let mut word_count = 0;
let mut i = content.len();
let mut in_word = false;
while i > 0 {
i -= 1;
let is_whitespace = content[i].is_ascii_whitespace();
if !in_word && !is_whitespace {
in_word = true;
word_count += 1;
if word_count == words {
break;
}
} else if is_whitespace {
in_word = false;
}
}
return content[i..].to_vec();
}
content.to_vec()
}
fn process_line_range(&self, content: &[u8], line_start: Option<usize>, line_end: Option<usize>) -> Vec<u8> {
let start_line = line_start.unwrap_or(1);
let end_line = line_end.unwrap_or(usize::MAX);
let mut result = Vec::new();
let mut current_line = 1;
let mut line_start_index = 0;
let mut in_range = false;
for (i, &byte) in content.iter().enumerate() {
if current_line > end_line {
break;
}
if current_line >= start_line && current_line <= end_line {
if !in_range {
in_range = true;
line_start_index = i;
}
result.push(byte);
}
if byte == b'\n' {
current_line += 1;
if current_line > end_line {
break;
}
}
}
result
}
}
// Head filter implementation
@@ -506,46 +636,47 @@ impl<R: Read + Send> Read for HeadFilter<R> {
}
}
// Tail filter implementation (uses a fixed buffer to avoid keeping everything in memory)
// Tail filter implementation using a ring buffer
struct TailFilter<R: Read + Send> {
inner: R,
buffer: Vec<u8>,
ring_buffer: Vec<u8>,
ring_buffer_pos: usize,
tail_bytes: Option<usize>,
tail_words: Option<usize>,
tail_lines: Option<usize>,
is_eof: bool,
bytes_read: usize,
}
impl<R: Read + Send> TailFilter<R> {
fn new(
mut inner: R,
inner: R,
tail_bytes: Option<usize>,
tail_words: Option<usize>,
tail_lines: Option<usize>,
) -> std::io::Result<Self> {
// For simplicity, we'll use a fixed buffer size
// In a real implementation, you might want to make this configurable
let mut buffer = vec![0; 8192];
let mut result = Vec::new();
// Determine buffer size based on the largest tail parameter
let buffer_size = if let Some(bytes) = tail_bytes {
bytes
} else if let Some(lines) = tail_lines {
// Estimate 256 bytes per line
lines * 256
} else if let Some(words) = tail_words {
// Estimate 16 bytes per word
words * 16
} else {
8192
};
loop {
let n = inner.read(&mut buffer)?;
if n == 0 {
break;
}
result.extend_from_slice(&buffer[..n]);
}
// Process the result to find the tail
// This implementation keeps the result in memory, which may not be ideal for very large files
// For a true streaming implementation, a more complex approach is needed
Ok(Self {
inner,
buffer: result,
ring_buffer: vec![0; buffer_size],
ring_buffer_pos: 0,
tail_bytes,
tail_words,
tail_lines,
is_eof: false,
bytes_read: 0,
})
}
}
@@ -556,13 +687,28 @@ impl<R: Read + Send> Read for TailFilter<R> {
return Ok(0);
}
// Process the buffered data to extract the tail
// This is a placeholder implementation
// For now, just return the entire buffer
let to_copy = std::cmp::min(buf.len(), self.buffer.len());
buf[..to_copy].copy_from_slice(&self.buffer[..to_copy]);
// Fill the ring buffer with data from the inner reader
let mut temp_buf = vec![0; 8192];
let n = self.inner.read(&mut temp_buf)?;
if n == 0 {
self.is_eof = true;
Ok(to_copy)
// Now we can process the ring buffer to extract the tail
// This part needs to be implemented based on the tail parameters
// For now, just return from the ring buffer
let to_copy = std::cmp::min(buf.len(), self.ring_buffer.len());
buf[..to_copy].copy_from_slice(&self.ring_buffer[..to_copy]);
return Ok(to_copy);
}
// Add new data to the ring buffer
for &byte in &temp_buf[..n] {
self.ring_buffer[self.ring_buffer_pos] = byte;
self.ring_buffer_pos = (self.ring_buffer_pos + 1) % self.ring_buffer.len();
self.bytes_read += 1;
}
// We're still reading, so return 0 until EOF
Ok(0)
}
}