Servlet.service() for servlet [dispatcherServlet] in contextIllegal base64 character 3a，好建议，建一个bug方

 
2024-06-01 09:27:11.180 ERROR 18484 --- [nio-9090-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.IllegalArgumentException: Illegal base64 character 3a] with root cause
 
java.lang.IllegalArgumentException: Illegal base64 character 3a

<template>
    <div class="container">
      <Area v-on:setImgSrc="setImgSrc"/>
      <textarea v-model="value"></textarea>
    </div>
  </template>
  
  <script>
  import Area from "@/views/until/BaseView";
  import axios from "axios";
  export default {
    components: {
      Area
    },
    data: function() {
      return {
        value: '',
      }
    },
    methods: {
      setImgSrc: function (value) {
        this.value = value;
        // console.log(this.value)
        var imgArr = [];
        var that = this;
        var str = '';
        // var str1 = '';
        str = that.value;
        imgArr = str.split(',');
        // 切割的部分
        // str1 = imgArr[1];
        // console.log(typeof str1);
        //
        console.log(typeof imgArr[1]);
        axios.post('http://localhost:9090/text/text-only',{
                            imgBase64: imgArr[1],
                            imgType: 'png' }).then(function(res){
                                that.resdata = res.data;
                                    that.resdata.forEach((v)=>{
                                    that.str = that.str + v.text
                                })
                                console.log(that.str)
                            });
 
        // str = imgArr[1]
        // console.log(imgArr[1])
        
      // 切割写法
      //  console.log(str);
        // axios.post('http://localhost:9090/text/text-only',{
        //         imgBase64: ,
        //         imgType: 'png' }).then(function(res){
        //         that.resdata = res.data;
        //         that.resdata.forEach((v)=>{
        //         that.str = that.str + v.text
        //         })
        //         console.log(that.str)
        // })
      // }
    }
  }
}
  </script>
  <style>
  textarea {
    display: block;
    height: 200px;
    max-width: 100%;
    min-width: 100%;
    padding: calc(0.75em - 1px);
    resize: vertical;
    box-shadow: inset 0 0.0625em 0.125em rgba(10, 10, 10, 0.05);
    width: 100%;
    background-color: #fff;
    border-color: #dbdbdb;
    border-radius: 4px;
    box-sizing: border-box;
  }
  </style>