Merge pull request #455 from lionsoul2014/opt_missing_search_return

optimize the ptr checking and return empty string for missing data

binding/c/xdb_searcher.c

@@ -196,6 +196,13 @@ XDB_PUBLIC(int) xdb_search(xdb_searcher_t *xdb, const bytes_ip_t *ip_bytes, int
     }
 
     // printf("s_ptr=%u, e_ptr=%u\n", s_ptr, e_ptr);
+    // @Note: ptr validate, zero ptr means source data missing
+    // so we could just stop here and return an empty string.
+    if (s_ptr == 0 || e_ptr == 0) {
+        xdb_region_buffer_empty(region);
+        return err;
+    }
+
     // binary search to get the final region info
     // segment_buffer = xdb_malloc(seg_index_size);
     seg_index_size = xdb->version->segment_index_size;

binding/csharp/IP2Region.Net/IP2Region.Net.csproj

@@ -2,7 +2,7 @@
 
     <PropertyGroup>
         <id>IP2Region.Net</id>
-        <version>3.0.1</version>
+        <version>3.0.2</version>
         <title>IP2Region.Net</title>
         <authors>Alan Lee;Argo Zhang(argo@live.ca)</authors>
         <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>

binding/csharp/IP2Region.Net/XDB/Searcher.cs

@@ -75,6 +75,14 @@ public class Searcher(CachePolicy cachePolicy, string xdbPath) : ISearcher
         var sPtr = BinaryPrimitives.ReadUInt32LittleEndian(vector.Span);
         var ePtr = BinaryPrimitives.ReadUInt32LittleEndian(vector.Span.Slice(4));
 
+        // @Note: ptr validate, zero ptr means source data missing
+        // so we could just stop here and return an empty string.
+        if (sPtr == 0 || ePtr == 0)
+        {
+            return "";
+        }
+
+
         var length = ipBytes.Length;
         var indexSize = length * 2 + 6;
         var l = 0;

binding/golang/xdb/searcher.go

@@ -132,6 +132,11 @@ func (s *Searcher) Search(ip []byte) (string, error) {
 	}
 
 	// fmt.Printf("sPtr=%d, ePtr=%d\n", sPtr, ePtr)
+	// @Note: ptr validate, zero ptr means source data missing
+	// so we could just stop here and return an empty string.
+	if sPtr == 0 || ePtr == 0 {
+		return "", nil
+	}
 
 	// binary search the segment index to get the region
 	var bytes, dBytes = len(ip), len(ip) << 1

binding/java/README.md

@@ -10,7 +10,7 @@
 <dependency>
     <groupId>org.lionsoul</groupId>
     <artifactId>ip2region</artifactId>
-    <version>3.3.5</version>
+    <version>3.3.6</version>
 </dependency>
 ```
 

binding/java/README_zh.md

@@ -9,7 +9,7 @@
 <dependency>
     <groupId>org.lionsoul</groupId>
     <artifactId>ip2region</artifactId>
-    <version>3.3.5</version>
+    <version>3.3.6</version>
 </dependency>
 ```
 

binding/java/pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>org.lionsoul</groupId>
     <artifactId>ip2region</artifactId>
-    <version>3.3.5</version>
+    <version>3.3.6</version>
     <packaging>jar</packaging>
 
     <name>ip2region</name>

binding/java/src/main/java/org/lionsoul/ip2region/xdb/Searcher.java

@@ -138,6 +138,11 @@ public class Searcher {
         }
 
         // System.out.printf("sPtr: %d, ePtr: %d\n", sPtr, ePtr);
+        // @Note: ptr validate, zero ptr means source data missing
+        // so we could just stop here and return an empty string.
+        if (sPtr == 0 || ePtr == 0) {
+            return "";
+        }
 
         // binary search the segment index block to get the region info
         final int bytes = ip.length, dBytes = ip.length << 1;

binding/javascript/package.json

@@ -1,6 +1,6 @@
 {
   "name": "ip2region.js",
-  "version": "3.1.7",
+  "version": "3.1.8",
   "description": "official javascript binding for ip2region with both IPv4 and IPv6 supported ",
   "type": "module",
   "main": "index.js",

binding/javascript/searcher.js

@@ -66,6 +66,12 @@ export class Searcher {
         }
 
         // console.log(`sPtr: ${sPtr}, ePtr: ${ePtr}`);
+        // @Note: ptr validate, zero ptr means source data missing
+        // so we could just stop here and return an empty string.
+        if (sPtr == 0 || ePtr == 0) {
+            return "";
+        }
+
         // binary search the segment index block to get the region info
         const bytes = ipBytes.length, dBytes = ipBytes.length << 1;
         const indexSize = this.version.indexSize;

binding/lua/xdb_searcher.lua

@@ -129,6 +129,13 @@ function xdb:search(ip_bytes)
     end
 
     -- print(string.format("s_ptr: %d, e_ptr: %d", s_ptr, e_ptr))
+    -- @Note: ptr validate, zero ptr means source data missing
+    -- so we could just stop here and return an empty string.
+    if s_ptr == 0 or e_ptr == 0 then
+        return "", nil
+    end
+
+
     -- binary search to get the data
     local index_size, ip_sub_compare = version.index_size, version.ip_sub_compare
     local bytes, d_bytes = version.bytes, version.bytes << 1

binding/php/xdb/Searcher.class.php

@@ -504,6 +504,12 @@ class Searcher {
         }
 
         // printf("sPtr: %d, ePtr: %d\n", $sPtr, $ePtr);
+        // @Note: ptr validate, zero ptr means source data missing
+        // so we could just stop here and return an empty string.
+        if ($sPtr == 0 || $ePtr == 0) {
+            return "";
+        }
+
         [$bytes, $dBytes] = [strlen($ipBytes), strlen($ipBytes) << 1];
 
         // binary search the segment index to get the region info

binding/python/ip2region/searcher.py

@@ -68,6 +68,11 @@ class Searcher(object):
             e_ptr = util.le_get_uint32(buff, 4)
         
         # print("s_ptr: {}, e_ptr: {}".format(s_ptr, e_ptr))
+        # @Note: ptr validate, zero ptr means source data missing
+        # so we could just stop here and return an empty string.
+        if s_ptr == 0 or e_ptr == 0:
+            return ""
+
         # binary search the segment index block to get the region info
         _bytes, _d_bytes = len(ip_bytes), len(ip_bytes) << 1
         index_size = self.version.index_size

binding/python/setup.py

@@ -2,7 +2,7 @@
 
 setuptools.setup(
     name="py-ip2region",
-    version="3.0.3",
+    version="3.0.4",
     description="ip2region official python binding with both IPv4 and IPv6 supported",
     long_description=open("README.md", encoding='utf-8').read(),
     long_description_content_type='text/markdown',

binding/rust/ip2region/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ip2region"
-version = "0.2.0"
+version = "0.2.1"
 edition = "2024"
 rust-version = "1.89.0"
 description = "The rust binding for ip2region"

binding/rust/ip2region/src/searcher.rs

@@ -68,6 +68,12 @@ impl Searcher {
         let end_ptr =
             u32::from_le_bytes(vector_index[start_point + 4..start_point + 8].try_into()?) as usize;
 
+        // @Note: ptr validate, zero ptr means source data missing
+        // so we could just stop here and return an empty string.
+        if start_ptr == 0 || end_ptr == 0 {
+            return Ok(String::new())
+        }
+
         // Binary search the segment index to get the region
         let segment_index_size = self.header.segment_index_size();
         let ip_bytes_len = self.header.ip_bytes_len();