diff --git a/.gitignore b/.gitignore
index 70854a8..2e709be 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@ data/**
 data/
 package-lock.json
 devdb.sqlite3
+db.sqlite3
 build/**
 app/**
 settings.json
diff --git a/src/route/contents.ts b/src/route/contents.ts
index 335a8f3..8e00a03 100644
--- a/src/route/contents.ts
+++ b/src/route/contents.ts
@@ -29,16 +29,31 @@ const ContentTagIDHandler = (controller: DocumentAccessor) => async (ctx: Contex
     ctx.type = 'json';
 };
 const ContentQueryHandler = (controller : DocumentAccessor) => async (ctx: Context,next: Next)=>{
-    const limit = ParseQueryNumber(ctx.query['limit']);
-    const cursor = ParseQueryNumber(ctx.query['cursor']);
-    const word = ParseQueryArgString(ctx.query['word']);
-    const content_type = ParseQueryArgString(ctx.query['content_type']);
-    const offset = ParseQueryNumber(ctx.query['offset']);
+
+    let query_limit = (ctx.query['limit']);
+    let query_cursor = (ctx.query['cursor']);
+    let query_word = (ctx.query['word']);
+    let query_content_type = (ctx.query['content_type']);
+    let query_offset = (ctx.query['offset']);
+    let query_use_offset = ctx.query['use_offset'];
+    if(query_limit instanceof Array 
+        || query_cursor instanceof Array 
+        || query_word instanceof Array 
+        || query_content_type instanceof Array
+        || query_offset instanceof Array
+        || query_use_offset instanceof Array){
+        return sendError(400,"paramter can not be array");
+    }
+    const limit = ParseQueryNumber(query_limit);
+    const cursor = ParseQueryNumber(query_cursor);
+    const word = ParseQueryArgString(query_word);
+    const content_type = ParseQueryArgString(query_content_type);
+    const offset = ParseQueryNumber(query_offset);
     if(limit === NaN || cursor === NaN || offset === NaN){
         return sendError(400,"parameter limit, cursor or offset is not a number");
     }
     const allow_tag = ParseQueryArray(ctx.query['allow_tag']);
-    const [ok,use_offset] = ParseQueryBoolean(ctx.query['use_offset']);
+    const [ok,use_offset] = ParseQueryBoolean(query_use_offset);
     if(!ok){
         return sendError(400,"use_offset must be true or false.");
     }