文件发送前先查找是否存在，防止反复提交文件进行校验

src/api/tool.js

@@ -10,7 +10,7 @@ export const GetRedisInfoService = (Data) => {
     let request1 = getRequest();
     return request1.post('/tool/get_redis', params,{
         headers: {
-            'token': Data.token, // 閻忓骏鎷<EFBFBD> token 闁哄洦瀵у畷鍙夌▔閻戞ê浜堕柣銊ュ閹躲倝鎮х仦瑙ｅ亾閿燂拷  
+            'token': Data.token, // 闁诲繐楠忛幏锟<EFBFBD> token 闂佸搫娲︾€笛冪暦閸欏鈻旈柣鎴灻禍鍫曟煟閵娿儱顏ч柟韬插€濋幃褏浠︾憴锝呬壕闁跨噦鎷<E599A6>  
         }
     })
 }
@@ -35,3 +35,15 @@ export const UploadFileService = (formData,token) => {
     })
 }
 
+export const GetFileInfoByMd5Service = (Data) => {
+    const params = new URLSearchParams();
+    for (let key in Data) {
+        params.append(key, Data[key])
+    }
+    //let request1 = getRequest();
+    return request2.post('/tool/file_list', params,{
+        headers: {
+            'token': Data.token, 
+        }
+    })
+}

src/views/Chat.vue

@@ -222,6 +222,7 @@ import { getFriendListService } from "@/api/chat.js";
 import { getMessageService } from "@/api/chat.js";
 import { sendMessageService } from "@/api/chat.js";
 import { UploadFileService } from "@/api/tool.js";
+import {GetFileInfoByMd5Service } from "@/api/tool.js";
 
 import {
   ElAvatar,
@@ -664,25 +665,30 @@ export default {
       //查看文件是否是图片或视频
  
       try {
+        let result={};
         this.file_md5 = await this.readFileAndCalculateMD5(this.file);
         //console.log("md5:",this.file_md5);
+        let md5_result = await GetFileInfoByMd5Service({"md5":this.file_md5,token:this.tokenData.token,"type":1});
+        if(md5_result.code === 0){
+          result = md5_result;
+        }else{
+           let formData = new FormData();
+            formData.append('file', this.file);
+            //console.log("add file: " + this.file);
+            formData.append('upload_type', "1");
+            formData.append('md5', this.file_md5);
+            formData.append('auth_type', "public");
+            //console.log("formData:",formData);
 
-
-        let formData = new FormData();
-        formData.append('file', this.file);
-        //console.log("add file: " + this.file);
-        formData.append('upload_type', "1");
-        formData.append('md5', this.file_md5);
-        formData.append('auth_type', "public");
-        //console.log("formData:",formData);
-
-      
-        let result = await UploadFileService(formData,this.tokenData.token);
-        if (result.code!== 0) {
-          ElMessage.error('上传文件失败，请稍后再试');
-          return;
+          
+            result = await UploadFileService(formData,this.tokenData.token);
+            if (result.code!== 0) {
+              ElMessage.error('上传文件失败，请稍后再试');
+              return;
+            }
         }
         let resp_data = result.data;
+
         //console.log("resp:",resp_data);
         let url = "https://gep.ljsea.top/tool/file/"+resp_data.FileStoreName;
         let msg_ ="";