diff --git a/src/api/controllers/chat.ts b/src/api/controllers/chat.ts
index 969b8f9..52f61bc 100644
--- a/src/api/controllers/chat.ts
+++ b/src/api/controllers/chat.ts
@@ -262,9 +262,8 @@ function messagesPrepare(messages: any[]) {
         return _content + (v["text"] || "");
       }, content);
     }
-    return (content += `<|im_start|>${message.role || "user"}\n${
-      message.content
-    }<|im_end|>\n`);
+    return (content += `<|im_start|>${message.role || "user"}\n${message.content
+      }<|im_end|>\n`);
   }, "");
   return [
     {
@@ -327,10 +326,7 @@ async function receiveStream(stream: any): Promise<any> {
           return str + content;
         }, "");
         const exceptCharIndex = text.indexOf('�');
-        let chunk = text.substring(
-          data.choices[0].message.content.length,
-          exceptCharIndex == -1 ? text.length : exceptCharIndex
-        );
+        let chunk = text.substring(exceptCharIndex != -1 ? Math.min(data.choices[0].message.content.length, exceptCharIndex) : data.choices[0].message.content.length, exceptCharIndex == -1 ? text.length : exceptCharIndex);
         if (chunk && result.contentType == "text2image") {
           chunk = chunk.replace(
             /https?:\/\/[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\b([-a-zA-Z0-9@:%_\+.~#?&//=\,]*)/gi,
@@ -409,7 +405,7 @@ function createTransStream(stream: any, endCallback?: Function) {
         return str + content;
       }, "");
       const exceptCharIndex = text.indexOf('�');
-      let chunk = text.substring(content.length, exceptCharIndex == -1 ? text.length : exceptCharIndex);
+      let chunk = text.substring(exceptCharIndex != -1 ? Math.min(content.length, exceptCharIndex) : content.length, exceptCharIndex == -1 ? text.length : exceptCharIndex);
       if (chunk && result.contentType == "text2image") {
         chunk = chunk.replace(
           /https?:\/\/[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\b([-a-zA-Z0-9@:%_\+.~#?&//=\,]*)/gi,