前端上传大文件，后端报错Content-Type ‘application/octet-stream‘ is not supported【解决】

• 1. 报错内容org.springframework.web.HttpMediaTypeNotSupportedException: Content-Type 'application/octet-stream' is not supported
• 2. 组件库：naiveui中upload进行上传功能使用的主要组件
• 3. 使用原生XMLHttpRequest进行接口请求
• 4. authorization请求头需要手动写入
• 5. 不需要手动配置请求头 文件格式类型 headers: { 'Content-Type': 'multipart/form-data' },
• 6. xhr.onreadystatechange — 监听 readyState 变化

<script setup lang="tsx">

/**
 * 上传固件文件变化
 *
 * @param data
 */
const handleUploadChange = (data: {
  file: SettledFileInfo;
  fileList: SettledFileInfo[];
  event: ProgressEvent | Event | undefined;
}) => {
  fileList.value = data.fileList;
  fileData.value = data.file.file || undefined;
};

/** 上传固件 */
const upload = async () => {
const isHttpProxy = import.meta.env.DEV && import.meta.env.VITE_HTTP_PROXY === 'Y'; // 不同环境---域名不同
const { otherBaseURL } = getServiceBaseURL(import.meta.env, isHttpProxy);
const xhr = new XMLHttpRequest()

xhr.open('POST',otherBaseURL.aj+ '/monitor/ota/upgrade/upload', true);
xhr.onload = () => {
  const response=JSON.parse(xhr.response)//response就是服务器返回的信息
}
const formData = new FormData()

formData.append("file", firmwareModel.value.file)//

formData.append("otaUpgrade", new Blob([JSON.stringify({
  upgradePackageName: firmwareModel.value.upgradePackageName,
  upgradeType: 1,
  upgradeVersion: firmwareModel.value.upgradeVersion,
  deviceClassificationId: props.details.deviceClassificationId,
  middleClassId: props.details.middleClassId,
  typeCodeId: props.details.typeCodeId,
  isOldDevice: true,
  remark: firmwareModel.value.remark,
  packageType: props.details.packageType
})], { type: "application/json" }))
xhr.setRequestHeader('Authorization',window.sessionStorage.getItem('token'));

xhr.send(formData)//执行发送指令
  // 监听 readyState 变化
  xhr.onreadystatechange = function() {
    if (xhr.readyState === XMLHttpRequest.DONE) {
      if (xhr.status === 200) {
        // 解析响应数据
        if(JSON.parse(xhr.response).status == -1){
          message.success('上传成功')
        }else{
          message.error(JSON.parse(xhr.response).message);
        }message 字段的值 // 输出: 已经存在同名的升级文件！
      } else {
        console.error('请求失败，状态码:', xhr.status);
      }
    }
  };

  submitLoading.value = false;
};
</script>

<template>
     <NUpload
       v-if="props.type === 'upload'"
        v-model:file-list="fileList"
        v-model:value="firmwareModel.file"
        directory-dnd
        multiple
        :max="1"
        @change="handleUploadChange"
      >
        <NUploadDragger>
          <div class="upload-icon">
            <NIcon size="48" :depth="3">
              <Archive16Filled />
            </NIcon>
          </div>
          <NText class="upload-content">点击或者拖动文件到该区域来上传</NText>
        </NUploadDragger>
      </NUpload>
      <span v-if="props.type === 'edit'">{{ props.details.upgradePackageName }}</span>
</template>

原文地址：https://blog.csdn.net/weixin_41056807/article/details/143684464

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