diff --git a/binding/rust/Cargo.toml b/binding/rust/Cargo.toml
index 5cf4568..39b03cd 100644
--- a/binding/rust/Cargo.toml
+++ b/binding/rust/Cargo.toml
@@ -1,2 +1,3 @@
 [workspace]
-members = ["example", "xdb"]
+resolver = "2"
+members = ["example", "ip2region"]
diff --git a/binding/rust/ReadMe.md b/binding/rust/ReadMe.md
index fe31b8a..25f68db 100644
--- a/binding/rust/ReadMe.md
+++ b/binding/rust/ReadMe.md
@@ -11,7 +11,8 @@
 
 # 缓存方式说明
 
-由于基于文件的查询以及缓存`VectorIndex`索引在并发较高(比如每秒上百并发)的情况下，每次查询都会从磁盘加载`ip2region.xdb`文件进入内存，由此会产生很高的磁盘`IO`以及极大的内存占用，所以决定做一次减法，不对这两种缓存进行开发，只提供缓存整个`xdb`文件的方式，以此实现最小的并发查询内存开销以及极限`CPU`性能压榨
+由于基于文件的查询以及缓存`VectorIndex`索引在并发较高(比如每秒上百并发)的情况下，查询会从磁盘上的`ip2region.xdb`按需进行`IO`读取，由于
+占用内存较低，
 
 # 使用方式
 
diff --git a/binding/rust/example/Cargo.toml b/binding/rust/example/Cargo.toml
index 8fd7424..e36c708 100644
--- a/binding/rust/example/Cargo.toml
+++ b/binding/rust/example/Cargo.toml
@@ -1,16 +1,15 @@
 [package]
 name = "rust-example"
 default-run = "rust-example"
-version = "0.1.0"
-edition = "2021"
-rust-version = "1.66.0"
-description = "the rust binding for ip2region"
+version = "0.2.0"
+edition = "2024"
+rust-version = "1.89.0"
+description = "Rust binding example for ip2region"
 license = "Apache-2.0"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-xdb = { path = "../xdb" }
-clap = { version = "4.0" }
-tracing = "0.1"
-tracing-subscriber = "0.3.14"
+ip2region = { path = "../ip2region" }
+clap = { version = "4.5", features = ["derive", "env"] }
+tracing-subscriber = "0.3"
diff --git a/binding/rust/example/src/cmd.rs b/binding/rust/example/src/cmd.rs
index 98402a4..24ce79a 100644
--- a/binding/rust/example/src/cmd.rs
+++ b/binding/rust/example/src/cmd.rs
@@ -1,27 +1,34 @@
-use clap::{Arg, ArgMatches, Command};
+use clap::{Parser, Subcommand, ValueEnum};
 
-pub fn get_matches() -> ArgMatches {
-    let db_arg = Arg::new("db")
-        .long("db")
-        .help("the xdb filepath, you can set this field like \
-        ../data/ip2region.xdb,if you dont set,\
-         if will detect xdb file on ../data/ip2region.xdb, ../../data/ip2region.xdb, ../../../data/ip2region.xdb if exists");
-
-    Command::new("ip2region")
-        .version("0.1")
-        .about("ip2region bin program")
-        .long_about("you can set --db in command to specific the xdb filepath, default run query")
-        .subcommand(Command::new("query").about("query test").arg(&db_arg))
-        .subcommand(
-            Command::new("bench")
-                .about("bench test")
-                .arg(
-                    Arg::new("src")
-                        .long("src")
-                        .help("set this to specific source bench file")
-                        .required(true),
-                )
-                .arg(&db_arg),
-        )
-        .get_matches()
+/// Rust binding example for ip2region
+///
+/// `cargo run -- --xdb=../../../data/ip2region_v4.xdb bench ../../../data/ip.test.txt`
+///
+/// `cargo run -- --xdb=../../../data/ip2region_v4.xdb query`
+///
+#[derive(Parser)]
+pub struct Command {
+    /// xdb filepath, e.g. `../../../data/ip2region_v4.xdb`
+    #[arg(long, env = "XDB")]
+    pub xdb: String,
+    #[arg(long, value_enum, default_value_t = CmdCachePolicy::FullMemory)]
+    pub cache_policy: CmdCachePolicy,
+    #[clap(subcommand)]
+    pub action: Action,
+}
+
+#[derive(Subcommand)]
+pub enum Action {
+    /// Bench the ip search and output performance info
+    Bench { check_file: String},
+    /// Interactive input and output, querying one IP and get result at a time
+    Query,
+}
+
+#[derive(Debug, PartialEq, ValueEnum, Clone, Copy, Default)]
+pub enum CmdCachePolicy {
+    #[default]
+    FullMemory,
+    NoCache,
+    VectorIndex,
 }
diff --git a/binding/rust/example/src/main.rs b/binding/rust/example/src/main.rs
index 2578ab5..048adf8 100644
--- a/binding/rust/example/src/main.rs
+++ b/binding/rust/example/src/main.rs
@@ -7,26 +7,16 @@ use std::net::Ipv4Addr;
 use std::str::FromStr;
 use std::time::Instant;
 
-use clap::ArgMatches;
-
-use xdb::{search_by_ip, searcher_init};
+use clap::Parser;
+use ip2region::{Searcher, CachePolicy};
+use crate::cmd::{Action, CmdCachePolicy, Command};
 
 mod cmd;
 
-/// set rust log level, if you don`t want print log, you can skip this
-fn log_init() {
-    let rust_log_key = "RUST_LOG";
-    std::env::var(rust_log_key).unwrap_or_else(|_| {
-        std::env::set_var(rust_log_key, "INFO");
-        std::env::var(rust_log_key).unwrap()
-    });
-    tracing_subscriber::fmt::init();
-}
-
-fn bench_test(src_filepath: &str) {
+fn bench(searcher: &Searcher, check_filepath: &str) {
     let now = Instant::now();
     let mut count = 0;
-    let mut file = File::open(src_filepath).unwrap();
+    let mut file = File::open(check_filepath).unwrap();
     let mut contents = String::new();
     file.read_to_string(&mut contents).unwrap();
 
@@ -53,7 +43,7 @@ fn bench_test(src_filepath: &str) {
             ((mid_ip as u64 + end_ip as u64) >> 1) as u32,
             end_ip,
         ] {
-            let result = search_by_ip(ip).unwrap();
+            let result = searcher.search(ip).unwrap();
             assert_eq!(result.as_str(), ip_test_line[2]);
             count += 1;
         }
@@ -67,7 +57,7 @@ fn bench_test(src_filepath: &str) {
     )
 }
 
-fn query_test() {
+fn query(searcher: &Searcher) {
     println!("ip2region xdb searcher test program, type `quit` or `Ctrl + c` to exit");
     loop {
         print!("ip2region>> ");
@@ -79,32 +69,25 @@ fn query_test() {
         }
         let line = line.trim();
         let now = Instant::now();
-        let result = search_by_ip(line);
+        let result = searcher.search(line);
         let cost = now.elapsed();
         println!("region: {result:?}, took: {cost:?}",);
     }
 }
 
-fn matches_for_searcher(matches: &ArgMatches) {
-    if let Some(xdb_filepath) = matches.get_one::<String>("db") {
-        searcher_init(Some(xdb_filepath.to_owned()))
-    } else {
-        searcher_init(None);
-    }
-}
-
 fn main() {
-    log_init();
-    let matches = cmd::get_matches();
-    if let Some(sub_matches) = matches.subcommand_matches("bench") {
-        matches_for_searcher(sub_matches);
-        let src_filepath = sub_matches.get_one::<String>("src").unwrap();
+    tracing_subscriber::fmt::init();
 
-        bench_test(src_filepath);
-    }
-
-    if let Some(sub_matches) = matches.subcommand_matches("query") {
-        matches_for_searcher(sub_matches);
-        query_test()
+    let cmd = Command::parse();
+    let cache_policy = match cmd.cache_policy {
+        CmdCachePolicy::FullMemory => CachePolicy::FullMemory,
+        CmdCachePolicy::VectorIndex => CachePolicy::VectorIndex,
+        CmdCachePolicy::NoCache => CachePolicy::NoCache
+    };
+    
+    let searcher = Searcher::new(cmd.xdb, cache_policy);
+    match cmd.action {
+        Action::Bench{ check_file} => bench(&searcher, &check_file),
+        Action::Query => query(&searcher)
     }
 }
diff --git a/binding/rust/xdb/Cargo.toml b/binding/rust/ip2region/Cargo.toml
similarity index 53%
rename from binding/rust/xdb/Cargo.toml
rename to binding/rust/ip2region/Cargo.toml
index 2d10ef7..fb0a414 100644
--- a/binding/rust/xdb/Cargo.toml
+++ b/binding/rust/ip2region/Cargo.toml
@@ -1,21 +1,20 @@
 [package]
-name = "xdb"
-version = "0.1.0"
-edition = "2021"
-rust-version = "1.66.0"
-description = "the rust binding for ip2region"
+name = "ip2region"
+version = "0.2.0"
+edition = "2024"
+rust-version = "1.89.0"
+description = "The rust binding for ip2region"
 license = "Apache-2.0"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-once_cell = "1.16"
 tracing = "0.1"
-tracing-subscriber = "0.3.14"
+thiserror = "2"
 
 [dev-dependencies]
-criterion = "0.4"
-rand = "0.8"
+criterion = "0.7"
+rand = "0.9"
 
 [[bench]]
 name = "search"
diff --git a/binding/rust/ip2region/benches/search.rs b/binding/rust/ip2region/benches/search.rs
new file mode 100644
index 0000000..a6c217f
--- /dev/null
+++ b/binding/rust/ip2region/benches/search.rs
@@ -0,0 +1,31 @@
+use criterion::{Criterion, criterion_group, criterion_main};
+use rand;
+
+use ip2region::{CachePolicy, Searcher};
+
+const XDB_FILEPATH: &'static str = "../../../data/ip2region_v4.xdb";
+
+macro_rules! bench_search {
+    ($name:ident, $cache_policy:expr) => {
+        fn $name(c: &mut Criterion) {
+            c.bench_function(stringify!($name), |b| {
+                let searcher = Searcher::new(XDB_FILEPATH.to_owned(), $cache_policy);
+                b.iter(|| {
+                    searcher.search(rand::random::<u32>()).unwrap();
+                })
+            });
+        }
+    };
+}
+
+bench_search!(no_memory_bench, CachePolicy::NoCache);
+bench_search!(vector_index_cache_bench, CachePolicy::VectorIndex);
+bench_search!(full_memory_cache_bench, CachePolicy::FullMemory);
+
+criterion_group!(
+    benches,
+    no_memory_bench,
+    vector_index_cache_bench,
+    full_memory_cache_bench,
+);
+criterion_main!(benches);
diff --git a/binding/rust/ip2region/src/error.rs b/binding/rust/ip2region/src/error.rs
new file mode 100644
index 0000000..7f2f973
--- /dev/null
+++ b/binding/rust/ip2region/src/error.rs
@@ -0,0 +1,16 @@
+#[derive(Debug, thiserror::Error)]
+pub enum Ip2RegionError {
+    #[error("Io error: {0}")]
+    IoError(#[from] std::io::Error),
+
+    #[error("From UTF-8 error: {0}")]
+    Utf8Error(#[from] std::string::FromUtf8Error),
+
+    #[error("Parse invalid IP address")]
+    ParseIpaddress(#[from] std::num::ParseIntError),
+
+    #[error("No matched Ipaddress")]
+    NoMatchedIP,
+}
+
+pub type Result<T> = std::result::Result<T, Ip2RegionError>;
diff --git a/binding/rust/xdb/src/ip_value.rs b/binding/rust/ip2region/src/ip_value.rs
similarity index 81%
rename from binding/rust/xdb/src/ip_value.rs
rename to binding/rust/ip2region/src/ip_value.rs
index 0a11f92..4a08f0e 100644
--- a/binding/rust/xdb/src/ip_value.rs
+++ b/binding/rust/ip2region/src/ip_value.rs
@@ -1,19 +1,20 @@
-use std::error::Error;
 use std::net::Ipv4Addr;
 use std::str::FromStr;
 
+use crate::error::Result;
+
 pub trait ToUIntIP {
-    fn to_u32_ip(&self) -> Result<u32, Box<dyn Error>>;
+    fn to_u32_ip(&self) -> Result<u32>;
 }
 
 impl ToUIntIP for u32 {
-    fn to_u32_ip(&self) -> Result<u32, Box<dyn Error>> {
+    fn to_u32_ip(&self) -> Result<u32> {
         Ok(self.to_owned())
     }
 }
 
 impl ToUIntIP for &str {
-    fn to_u32_ip(&self) -> Result<u32, Box<dyn Error>> {
+    fn to_u32_ip(&self) -> Result<u32> {
         if let Ok(ip_addr) = Ipv4Addr::from_str(self) {
             return Ok(u32::from(ip_addr));
         }
@@ -22,7 +23,7 @@ impl ToUIntIP for &str {
 }
 
 impl ToUIntIP for Ipv4Addr {
-    fn to_u32_ip(&self) -> Result<u32, Box<dyn Error>> {
+    fn to_u32_ip(&self) -> Result<u32> {
         Ok(u32::from(*self))
     }
 }
diff --git a/binding/rust/ip2region/src/lib.rs b/binding/rust/ip2region/src/lib.rs
new file mode 100644
index 0000000..a9fc7cf
--- /dev/null
+++ b/binding/rust/ip2region/src/lib.rs
@@ -0,0 +1,6 @@
+mod error;
+mod ip_value;
+mod searcher;
+
+pub use self::ip_value::ToUIntIP;
+pub use self::searcher::{CachePolicy, Searcher};
diff --git a/binding/rust/ip2region/src/searcher.rs b/binding/rust/ip2region/src/searcher.rs
new file mode 100644
index 0000000..ad2058a
--- /dev/null
+++ b/binding/rust/ip2region/src/searcher.rs
@@ -0,0 +1,208 @@
+use std::borrow::Cow;
+use std::fmt::Display;
+use std::fs::File;
+use std::io::{Read, Seek, SeekFrom};
+use std::sync::OnceLock;
+
+use tracing::{debug, trace, warn};
+
+use crate::ToUIntIP;
+use crate::error::{Ip2RegionError, Result};
+
+const HEADER_INFO_LENGTH: usize = 256;
+const VECTOR_INDEX_LENGTH: usize = 256 * 256 * 8;
+const VECTOR_INDEX_COLS: usize = 256;
+const VECTOR_INDEX_SIZE: usize = 8;
+const SEGMENT_INDEX_SIZE: usize = 14;
+
+static VECTOR_INDEX_CACHE: OnceLock<Vec<u8>> = OnceLock::new();
+static FULL_CACHE: OnceLock<Vec<u8>> = OnceLock::new();
+
+pub struct Searcher {
+    pub filepath: String,
+    pub cache_policy: CachePolicy,
+}
+
+#[derive(PartialEq, Debug)]
+pub enum CachePolicy {
+    NoCache,
+    VectorIndex,
+    FullMemory,
+}
+
+impl Searcher {
+    pub fn new(filepath: String, cache_policy: CachePolicy) -> Self {
+        Self {
+            filepath,
+            cache_policy,
+        }
+    }
+
+    pub fn search<T>(&self, ip: T) -> Result<String>
+    where
+        T: ToUIntIP + Display,
+    {
+        let ip = ip.to_u32_ip()?;
+        let il0 = ((ip >> 24) & 0xFF) as usize;
+        let il1 = ((ip >> 16) & 0xFF) as usize;
+        let start_point = VECTOR_INDEX_SIZE * (il0 * VECTOR_INDEX_COLS + il1);
+
+        let vector_index = self.vector_index()?;
+        let start_ptr = get_block_by_size(&vector_index, start_point, 4);
+        let end_ptr = get_block_by_size(&vector_index, start_point + 4, 4);
+
+        let mut left: usize = 0;
+        let mut right: usize = (end_ptr - start_ptr) / SEGMENT_INDEX_SIZE;
+
+        while left <= right {
+            let mid = (left + right) >> 1;
+            let offset = start_ptr + mid * SEGMENT_INDEX_SIZE;
+            let buffer_ip_value = self.read_buf(offset, SEGMENT_INDEX_SIZE)?;
+
+            let start_ip = get_block_by_size(&buffer_ip_value, 0, 4);
+            if ip < (start_ip as u32) {
+                right = mid - 1;
+            } else if ip > (get_block_by_size(&buffer_ip_value, 4, 4) as u32) {
+                left = mid + 1;
+            } else {
+                let data_length = get_block_by_size(&buffer_ip_value, 8, 2);
+                let data_offset = get_block_by_size(&buffer_ip_value, 10, 4);
+                let result = String::from_utf8(self.read_buf(data_offset, data_length)?.to_vec())?;
+                return Ok(result);
+            }
+        }
+        Err(Ip2RegionError::NoMatchedIP)
+    }
+
+    pub fn vector_index(&self) -> Result<Cow<'_, [u8]>> {
+        if self.cache_policy.eq(&CachePolicy::NoCache) {
+            return self.read_buf(HEADER_INFO_LENGTH, VECTOR_INDEX_LENGTH);
+        }
+
+        match VECTOR_INDEX_CACHE.get() {
+            None => {
+                debug!("Load vector index cache");
+                let data = self
+                    .read_buf(HEADER_INFO_LENGTH, VECTOR_INDEX_LENGTH)?
+                    .to_vec();
+                let _ = VECTOR_INDEX_CACHE
+                    .set(data)
+                    .inspect_err(|_| warn!("Vector index cache already initialized"));
+
+                // Safety: VECTOR_INDEX_CACHE checked and set for empty before
+                let cache = VECTOR_INDEX_CACHE.get().unwrap();
+                Ok(Cow::Borrowed(cache))
+            }
+            Some(cache) => Ok(Cow::Borrowed(cache)),
+        }
+    }
+
+    pub fn read_buf(&self, offset: usize, size: usize) -> Result<Cow<'_, [u8]>> {
+        trace!(offset, size = size, "Read buffer");
+        if self.cache_policy.ne(&CachePolicy::FullMemory) {
+            debug!(filepath=?self.filepath, offset=offset, size=size, "Read buf without cache");
+            let mut file = File::open(&self.filepath)?;
+            file.seek(SeekFrom::Start(offset as u64))?;
+
+            let mut buf = vec![0u8; size];
+            file.take(size as u64).read_exact(&mut buf)?;
+            return Ok(Cow::from(buf));
+        }
+
+        match FULL_CACHE.get() {
+            None => {
+                debug!(filepath=?self.filepath, "Load full cache");
+                let mut file = File::open(&self.filepath)?;
+                let mut buf = Vec::new();
+                file.read_to_end(&mut buf)?;
+                let _ = FULL_CACHE
+                    .set(buf)
+                    .inspect_err(|_| warn!("Full cache already initialized"));
+
+                // Safety: FULL_CACHE checked and set for empty before
+                let cache = FULL_CACHE.get().unwrap();
+                Ok(Cow::from(&cache[offset..offset + size]))
+            }
+            Some(cache) => {
+                let data = Cow::from(&cache[offset..offset + size]);
+                Ok(data)
+            }
+        }
+    }
+}
+
+#[inline]
+pub fn get_block_by_size(bytes: &[u8], offset: usize, length: usize) -> usize {
+    let mut result: usize = 0;
+    for (index, value) in bytes[offset..offset + length].iter().enumerate() {
+        result += usize::from(*value) << (index << 3);
+    }
+    result
+}
+
+#[cfg(test)]
+mod tests {
+    use std::fs::File;
+    use std::io::{BufRead, BufReader};
+    use std::net::Ipv4Addr;
+    use std::str::FromStr;
+
+    use super::*;
+
+    const XDB_PATH: &str = "../../../data/ip2region_v4.xdb";
+    const CHECK_PATH: &str = "../../../data/ipv4_source.txt";
+
+    fn multi_type_ip(searcher: &Searcher) {
+        searcher.search("2.0.0.0").unwrap();
+        searcher.search("32").unwrap();
+        searcher.search(4294408949).unwrap();
+        searcher
+            .search(Ipv4Addr::from_str("1.1.1.1").unwrap())
+            .unwrap();
+    }
+
+    ///test all types find correct
+    #[test]
+    fn test_multi_type_ip() {
+        for cache_policy in [
+            CachePolicy::NoCache,
+            CachePolicy::FullMemory,
+            CachePolicy::VectorIndex,
+        ] {
+            multi_type_ip(&Searcher::new(XDB_PATH.to_owned(), cache_policy));
+        }
+    }
+
+    fn match_ip_correct(searcher: &Searcher) {
+        let file = File::open(CHECK_PATH).unwrap();
+        let reader = BufReader::new(file);
+
+        for line in reader.lines().take(100) {
+            let line = line.unwrap();
+
+            if !line.contains("|") {
+                continue;
+            }
+
+            let ip_test_line = line.splitn(3, "|").collect::<Vec<&str>>();
+            let start_ip = Ipv4Addr::from_str(ip_test_line[0]).unwrap();
+            let end_ip = Ipv4Addr::from_str(ip_test_line[1]).unwrap();
+            for _ in 0..10 {
+                let value = rand::random_range(u32::from(start_ip)..u32::from(end_ip) + 1);
+                let result = searcher.search(value).unwrap();
+                assert_eq!(result.as_str(), ip_test_line[2])
+            }
+        }
+    }
+
+    #[test]
+    fn test_match_ip_correct() {
+        for cache_policy in [
+            CachePolicy::NoCache,
+            CachePolicy::FullMemory,
+            CachePolicy::VectorIndex,
+        ] {
+            match_ip_correct(&Searcher::new(XDB_PATH.to_owned(), cache_policy));
+        }
+    }
+}
diff --git a/binding/rust/xdb/benches/search.rs b/binding/rust/xdb/benches/search.rs
deleted file mode 100644
index 34102ce..0000000
--- a/binding/rust/xdb/benches/search.rs
+++ /dev/null
@@ -1,52 +0,0 @@
-use criterion::{black_box, criterion_group, criterion_main, Criterion};
-use rand;
-
-use xdb::searcher::{
-    get_block_by_size, get_full_cache, get_vector_index_cache, search_by_ip, searcher_init,
-};
-
-fn search_by_ip_bench(c: &mut Criterion) {
-    c.bench_function("search_by_ip_bench", |b| {
-        searcher_init(None);
-        b.iter(|| {
-            search_by_ip(rand::random::<u32>()).unwrap();
-        })
-    });
-}
-
-fn get_block_by_size_bench(c: &mut Criterion) {
-    c.bench_function("get_block_by_size_bench", |b| {
-        b.iter(|| {
-            black_box(get_block_by_size(
-                get_full_cache(),
-                rand::random::<u16>() as usize,
-                4,
-            ));
-        })
-    });
-}
-
-fn get_full_cache_bench(c: &mut Criterion) {
-    c.bench_function("get_full_cache_bench", |b| {
-        b.iter(|| {
-            black_box(get_full_cache());
-        })
-    });
-}
-
-fn get_vec_index_cache_bench(c: &mut Criterion) {
-    c.bench_function("get_vec_index_cache_bench", |b| {
-        b.iter(|| {
-            black_box(get_vector_index_cache());
-        })
-    });
-}
-
-criterion_group!(
-    benches,
-    search_by_ip_bench,
-    get_block_by_size_bench,
-    get_full_cache_bench,
-    get_vec_index_cache_bench,
-);
-criterion_main!(benches);
diff --git a/binding/rust/xdb/src/lib.rs b/binding/rust/xdb/src/lib.rs
deleted file mode 100644
index 350f1f2..0000000
--- a/binding/rust/xdb/src/lib.rs
+++ /dev/null
@@ -1,4 +0,0 @@
-mod ip_value;
-pub use self::ip_value::ToUIntIP;
-pub mod searcher;
-pub use searcher::{search_by_ip, searcher_init};
diff --git a/binding/rust/xdb/src/searcher.rs b/binding/rust/xdb/src/searcher.rs
deleted file mode 100644
index cc57be0..0000000
--- a/binding/rust/xdb/src/searcher.rs
+++ /dev/null
@@ -1,168 +0,0 @@
-use std::error::Error;
-use std::fmt::Display;
-use std::fs::File;
-use std::io::Read;
-use std::path::Path;
-
-use once_cell::sync::OnceCell;
-
-use crate::ToUIntIP;
-
-const HEADER_INFO_LENGTH: usize = 256;
-const VECTOR_INDEX_COLS: usize = 256;
-const VECTOR_INDEX_SIZE: usize = 8;
-const SEGMENT_INDEX_SIZE: usize = 14;
-const VECTOR_INDEX_LENGTH: usize = 512 * 1024;
-
-const XDB_FILEPATH_ENV: &str = "XDB_FILEPATH";
-
-static CACHE: OnceCell<Vec<u8>> = OnceCell::new();
-
-/// check https://mp.weixin.qq.com/s/ndjzu0BgaeBmDOCw5aqHUg for details
-pub fn search_by_ip<T>(ip: T) -> Result<String, Box<dyn Error>>
-where
-    T: ToUIntIP + Display,
-{
-    let ip = ip.to_u32_ip()?;
-    let il0 = ((ip >> 24) & 0xFF) as usize;
-    let il1 = ((ip >> 16) & 0xFF) as usize;
-    let idx = VECTOR_INDEX_SIZE * (il0 * VECTOR_INDEX_COLS + il1);
-    let start_point = idx;
-    let vector_cache = get_vector_index_cache();
-    let start_ptr = get_block_by_size(vector_cache, start_point, 4);
-    let end_ptr = get_block_by_size(vector_cache, start_point + 4, 4);
-    let mut left: usize = 0;
-    let mut right: usize = (end_ptr - start_ptr) / SEGMENT_INDEX_SIZE;
-
-    while left <= right {
-        let mid = (left + right) >> 1;
-        let offset = start_ptr + mid * SEGMENT_INDEX_SIZE;
-        let buffer_ip_value = &get_full_cache()[offset..offset + SEGMENT_INDEX_SIZE];
-        let start_ip = get_block_by_size(buffer_ip_value, 0, 4);
-        if ip < (start_ip as u32) {
-            right = mid - 1;
-        } else if ip > (get_block_by_size(buffer_ip_value, 4, 4) as u32) {
-            left = mid + 1;
-        } else {
-            let data_length = get_block_by_size(buffer_ip_value, 8, 2);
-            let data_offset = get_block_by_size(buffer_ip_value, 10, 4);
-            let result = String::from_utf8(
-                get_full_cache()[data_offset..(data_offset + data_length)].to_vec(),
-            );
-            return Ok(result?);
-        }
-    }
-    Err("not matched".into())
-}
-
-/// it will check ../data/ip2region.xdb, ../../data/ip2region.xdb, ../../../data/ip2region.xdb
-fn default_detect_xdb_file() -> Result<String, Box<dyn Error>> {
-    let prefix = "../".to_owned();
-    for recurse in 1..4 {
-        let filepath = prefix.repeat(recurse) + "data/ip2region.xdb";
-        if Path::new(filepath.as_str()).exists() {
-            return Ok(filepath);
-        }
-    }
-    Err("default filepath not find the xdb file, so you must set xdb_filepath".into())
-}
-
-#[inline]
-pub fn get_block_by_size(bytes: &[u8], offset: usize, length: usize) -> usize {
-    let mut result: usize = 0;
-    for (index, value) in bytes[offset..offset + length].iter().enumerate() {
-        result += usize::from(*value) << (index << 3);
-    }
-    result
-}
-
-pub fn searcher_init(xdb_filepath: Option<String>) {
-    let xdb_filepath = xdb_filepath.unwrap_or_else(|| default_detect_xdb_file().unwrap());
-    std::env::set_var(XDB_FILEPATH_ENV, xdb_filepath);
-    CACHE.get_or_init(load_file);
-}
-
-pub fn get_vector_index_cache() -> &'static [u8] {
-    let full_cache: &'static Vec<u8> = get_full_cache();
-    &full_cache[HEADER_INFO_LENGTH..(HEADER_INFO_LENGTH + VECTOR_INDEX_LENGTH)]
-}
-
-fn load_file() -> Vec<u8> {
-    let xdb_filepath =
-        std::env::var("XDB_FILEPATH").unwrap_or_else(|_| default_detect_xdb_file().unwrap());
-    tracing::debug!("load xdb searcher file at {} ", xdb_filepath);
-    let mut f = File::open(xdb_filepath).expect("file open error");
-    let mut buffer = Vec::new();
-    f.read_to_end(&mut buffer).expect("load file error");
-    buffer
-}
-
-pub fn get_full_cache() -> &'static Vec<u8> {
-    CACHE.get_or_init(load_file)
-}
-
-#[cfg(test)]
-mod tests {
-    use std::fs::File;
-    use std::io::Read;
-    use std::net::Ipv4Addr;
-    use std::str::FromStr;
-    use std::thread;
-
-    use super::*;
-
-    ///test all types find correct
-    #[test]
-    fn test_multi_type_ip() {
-        searcher_init(None);
-
-        search_by_ip("2.0.0.0").unwrap();
-        search_by_ip("32").unwrap();
-        search_by_ip(4294408949).unwrap();
-        search_by_ip(Ipv4Addr::from_str("1.1.1.1").unwrap()).unwrap();
-    }
-
-    #[test]
-    fn test_match_all_ip_correct() {
-        searcher_init(None);
-        let mut file = File::open("../../../data/ip.test.txt").unwrap();
-        let mut contents = String::new();
-        file.read_to_string(&mut contents).unwrap();
-        for line in contents.split("\n") {
-            if !line.contains("|") {
-                continue;
-            }
-            let ip_test_line = line.splitn(3, "|").collect::<Vec<&str>>();
-            let start_ip = Ipv4Addr::from_str(ip_test_line[0]).unwrap();
-            let end_ip = Ipv4Addr::from_str(ip_test_line[1]).unwrap();
-            for value in u32::from(start_ip)..u32::from(end_ip) + 1 {
-                let result = search_by_ip(value).unwrap();
-                assert_eq!(result.as_str(), ip_test_line[2])
-            }
-        }
-    }
-
-    #[test]
-    fn test_multi_thread_only_load_xdb_once() {
-        searcher_init(None);
-        let handle = thread::spawn(|| {
-            let result = search_by_ip("2.2.2.2").unwrap();
-            println!("ip search in spawn: {result}");
-        });
-        let r = search_by_ip("1.1.1.1").unwrap();
-        println!("ip search in main thread: {r}");
-        handle.join().unwrap();
-    }
-
-    #[test]
-    fn test_multi_searcher_init() {
-        for _ in 0..5 {
-            thread::spawn(|| {
-                searcher_init(None);
-            });
-        }
-        searcher_init(None);
-        searcher_init(Some(String::from("test")));
-        search_by_ip(123).unwrap();
-    }
-}