Hexor/mus-fuse
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Implement simple file cache. It caches only beginnign

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This commit is contained in:
AB
2020-04-17 17:57:54 +03:00
parent 1485580e39
commit 1dd9b5064e
2 changed files with 98 additions and 54 deletions
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5
.vscode/settings.json vendored Normal file
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@ -0,0 +1,5 @@
{
"lldb.displayFormat": "auto",
"lldb.showDisassembly": "always",
"lldb.dereferencePointers": true
}

147
src/main.rs
View File

@ -10,8 +10,8 @@ use reqwest::blocking::Client;
use reqwest::blocking::Response;
use reqwest::header::CONTENT_LENGTH;
use std::collections::BTreeMap;
use std::env;
use std::ffi::OsStr;
use std::env;
use time::Timespec;
//use http::Method;
@ -34,6 +34,8 @@ pub struct Track {
}
const API_URL: &str = "https://mus.hexor.ru";
const CACHE_HEAD: i64 = 1024 * 1024;
const MAX_CACHE_SIZE: i64 = 10 * 1024 * 1025; // Mb
fn get_basename(path: Option<&String>) -> Option<String> {
let base = match percent_decode_str(path.unwrap().as_str()).decode_utf8() {
@ -65,9 +67,7 @@ struct JsonFilesystem {
tree: Vec<Track>,
attrs: BTreeMap<u64, FileAttr>,
inodes: BTreeMap<String, u64>,
buffer_data: Vec<u8>,
buffer_name: String,
req_counter: i32,
buffer_head: BTreeMap<String, Vec<u8>>,
buffer_length: BTreeMap<String, i64>,
}
@ -99,7 +99,8 @@ impl JsonFilesystem {
let basename = get_basename(track.path.as_ref()).unwrap().to_string();
let attr = FileAttr {
ino: i as u64 + 2,
size: 1024 * 1024 * 1024 as u64,
//size: 1024 * 1024 * 1024 as u64,
size: 591646132,
blocks: 0,
atime: ts,
mtime: ts,
@ -120,10 +121,8 @@ impl JsonFilesystem {
tree: tree.clone(),
attrs: attrs,
inodes: inodes,
buffer_data: Vec::new(),
buffer_name: "".to_string(),
buffer_head: BTreeMap::new(),
buffer_length: BTreeMap::new(),
req_counter: 0,
}
}
}
@ -172,7 +171,7 @@ impl Filesystem for JsonFilesystem {
"read(ino={}, fh={}, offset={}, size={}) ",
ino, fh, offset, size
);
//let mus = fs::read("/home/ab/Downloads/Mizuki.mp3").unwrap();
let url = &self.tree[(ino - 2) as usize].path.as_ref().unwrap();
let id = &self.tree[(ino - 2) as usize].id.as_ref().unwrap();
let full_url = format!("{}/{}", API_URL, url);
@ -184,7 +183,7 @@ impl Filesystem for JsonFilesystem {
// content_length cache.
if self.buffer_length.contains_key(id.as_str()) {
content_length = self.buffer_length[id.as_str()];
print!("Hit len cache! ");
print!("Hit LC ");
} else {
resp = client.head(full_url.as_str()).send().unwrap();
content_length = resp
@ -196,53 +195,93 @@ impl Filesystem for JsonFilesystem {
.parse::<i64>()
.unwrap();
self.buffer_length.insert(id.to_string(), content_length);
print!("Miss len cache! ");
print!("Miss LC ");
}
// Chink cache
/*
if self.buffer_name == id.as_str() {
chunk = self.buffer_data.clone();
print!("Hit content cache!");
} else {
let resp = reqwest::blocking::get(full_url.as_str()).unwrap();
print!("LC: {} ", self.buffer_length.len());
print!("HC: {} ", self.buffer_head.len());
if content_length > offset {
print!("Content len {:?} ", content_length);
let mut end_of_chunk = offset - 1 + size as i64;
let range = format!(
"bytes={}-{}",
offset,
if (end_of_chunk) > content_length {
content_length
} else {
end_of_chunk
}
);
// if it's beginning of file...
if (offset - 1 + size as i64) < CACHE_HEAD {
// cleaning cache before. it should be less than MAX_CACHE_SIZE bytes
if self.buffer_head.len() as i64 * CACHE_HEAD > MAX_CACHE_SIZE {
let (key, _) = self.buffer_head.iter_mut().next().unwrap();
let key_cpy: String = key.to_string();
self.buffer_head.remove(&key_cpy);
print!(" *Cache Cleaned* ");
}
// looking for CACHE_HEAD bytes file beginning in cache
if self.buffer_head.contains_key(id.as_str()) {
print!("Hit head cache! ");
chunk = self.buffer_head[id.as_str()]
[offset as usize..(size + offset as u32) as usize]
.to_vec()
.clone();
reply.data(&chunk);
} else {
print!("Miss head cache! ");
resp = client
.get(full_url.as_str())
.header(
"Range",
format!(
"bytes=0-{}",
if CACHE_HEAD > content_length {
content_length
} else {
CACHE_HEAD
}
),
)
.send()
.unwrap();
let response = resp.bytes().unwrap();
self.buffer_head.insert(id.to_string(), response.to_vec());
end_of_chunk = if content_length < end_of_chunk {
content_length
} else {
end_of_chunk
};
chunk = response[offset as usize..end_of_chunk as usize].to_vec();
reply.data(&chunk);
}
println!("Chunk len: {:?} ", chunk.len());
return;
}
resp = client
.get(full_url.as_str())
.header("Range", &range)
.send()
.unwrap();
let test = resp.bytes().unwrap();
full_track = test.to_vec().clone();
self.buffer_data = full_track.clone();
self.buffer_name = full_url;
println!("Miss cache!");
}
*/
print!("Len {:?} ", content_length);
let range = format!("bytes={}-{}", offset, offset - 1 + size as i64);
print!(" Range: {:?}", range);
resp = client
.get(full_url.as_str())
.header("Range", &range)
.send()
.unwrap();
let test = resp.bytes().unwrap();
chunk = test.to_vec().clone();
//self.buffer_data = full_track.clone();
//self.buffer_name = full_url;
//println!("Miss cache!");
//}
/*
let mut chunk_end = size as usize + offset as usize;
if chunk_end >= content_length {
chunk_end = content_length;
}
if offset as usize >= content_length {
reply.data(&full_track[(content_length - 1) as usize..chunk_end as usize]);
chunk = test.to_vec().clone();
reply.data(&chunk);
println!(
" Len: {}, Chunk {} - {}",
chunk.len(),
offset,
offset - 1 + chunk.len() as i64
);
} else {
reply.data(&full_track[offset as usize..chunk_end as usize]);
}*/
reply.data(&chunk);
println!(
" Len: {}, chunk {} - {}",
chunk.len(),
offset,
offset + size as i64
);
println!(
"Wrong offset. Len is {} but offset {}",
content_length, offset
);
reply.data(&[]);
}
return;
}