go-gin-vue3-elementPlus带参手动上传文件

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go的mvc层使用gin框架. 总的来说gin的formFile封装的不如springboot的好.获取值有很多的坑. 当然使用axios的formData也有不少坑.现给出较好的解决办法

以下部分仅贴出关键代码

一. 总体代码流程

1.1 全局Axios部分样例

axios前后端网络交互

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
// 创建axios实例
const service = axios.create({// axios中请求配置有baseURL选项，表示请求URL公共部分baseURL: 'http://127.0.0.1:20139',// 超时timeout: 5000
})export default service;// 不使用service实例.重新创建axios封装上传
export function uploadFiles(url,data={}){return axios({method: "POST",url: 'http://127.0.0.1:20139'+url,transformRequest: [function(data, headers) {// 去除post请求默认的Content-Typedelete headers['Content-Type']return data}],data: data,})
}

1.2 上传业务

关键代码一览.需要留意的是,我使用手动上传,element中before-upload,before-remove失效. 为避免更多问题使用了on-change监听.其中uploadFile参数是element封装的普通对象. file对象被封装在其中的raw属性. 这一点要尤为注意 gin框架不同于springboot. formfile只能读取file类型

    <el-form :inline="true":model="resumeForm"class="demo-form-inline"label-position="right"label-width="100px"><el-row :gutter="20"><el-col :span="6"><el-form-item label="姓名"><el-input v-model="resumeForm.name" placeholder="请输入姓名" clearable/></el-form-item></el-col><el-col :span="6"><el-form-item label="电话"><el-input v-model="resumeForm.phone" placeholder="请输入电话" clearable/></el-form-item></el-col><el-col :span="6"><el-form-item label="邮箱"><el-input v-model="resumeForm.email" placeholder="请输入邮箱" clearable/></el-form-item></el-col></el-row><el-row :gutter="20"><el-col :span="6"><el-form-item label="工作经验"><el-input v-model="resumeForm.experience" placeholder="请输入工作经验" clearable/></el-form-item></el-col><el-col :span="6"><el-form-item label="学历"><el-selectv-model="resumeForm.education"placeholder="请选择学历水平"clearable><el-option label="专科" value="0"/><el-option label="本科" value="1"/><el-option label="研究生" value="2"/><el-option label="博士" value="3"/></el-select></el-form-item></el-col></el-row><el-row><el-col :span="24"><el-form-item label="上传简历"><el-uploadref="recruitRef"class="upload-demo"dragaction="#":auto-upload="false":on-change="handleChange"limit="1"><el-icon class="el-icon--upload"><upload-filled/></el-icon><div class="el-upload__text">拖拽 或 <em>点击上传</em></div><template #tip><div class="el-upload__tip">.pdf 文件大小 ≤ 500kb</div></template></el-upload></el-form-item></el-col></el-row><el-form-item><el-button type="primary" @click="postResumeForm()">投递</el-button></el-form-item></el-form>

const router = useRouter()
const resumeForm = reactive({name: '',phone: '',email: '',experience: '',education: '',position: router.currentRoute.value.params.position
})const recruitRef = ref()
let formData = new FormData()
// 文件改变触发
function handleChange(uploadFile, uploadFiles) {// 文件校验if (!verifyBeforeUpload(uploadFile)) {removeFile()return}console.log(uploadFile)formData.append("file", uploadFile.raw)
}function removeFile() {if (recruitRef.value) {formData = new FormData()recruitRef.value.clearFiles()}
}
// 提交表单
function postResumeForm() {ElMessageBox.confirm('确认提交?提交后仅能修改一次', '提示', {confirmButtonText: "确定",cancelButtonText: "取消",type: "warning"}).then(async () => {if (formData === null || formData === undefined) {ElMessage.info("必须递交简历信息!")return}for (let key in resumeForm) {formData.append(key,resumeForm[key])}let res = await reqPostResumeForm(formData)if (res.code !== 200) {ElMessage.error("简历投递失败")return}await ElMessageBox.alert("简历投递成功! 3-7个工作日内,您将收到回复", '提示', {confirmButtonText: "确认"})removeFile()}).catch((err) => {removeFile()console.log(err)ElMessage.info("简历投递已取消!")})
}

文件校验部分

// 单文件大小校验
function verifyFileSize(file) {if (file) {let fileSize = file.size;let fileMaxSize = 1024 * 500;//500kbif (fileSize > fileMaxSize) {ElMessage.error("文件不能大于500kb！");file.value = "";return false;} else if (fileSize <= 0) {ElMessage.error("文件不能为0kb！");file.value = "";return false;}return true}ElMessage.error("必须传递文件!")return false;}// 校验文件格式和大小
export function verifyBeforeUpload(file) {// 格式const extension = file.name.split('.').pop().toLowerCase();console.log(extension)if (!ACCEPTED_EXTENSIONS.includes(extension)) {ElMessage.error('仅支持 pdf 格式的文件');return false;}// 大小return verifyFileSize(file);
}

请求发送部分

export function reqPostResumeForm(formData){return uploadFiles(jobs.postResumeUrl,formData)
}

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二. 后端部分

func PostResume(c *gin.Context) {file, err := c.FormFile("file")if err != nil {panic(fmt.Sprintf("file参数不能为空"))}var resume model.Resumeerr = c.ShouldBind(&resume)if err != nil {panic(fmt.Sprintf("resume获取错误,原因是: %v", err))}log.Printf("%v", file)
}

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三. 测试样例