2020-07-28 10:03:53 +08:00
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---
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title: File 文件上传
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2020-07-29 16:20:21 +08:00
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description:
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2020-07-28 10:03:53 +08:00
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type: 0
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group: null
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menuName: File
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2020-07-29 16:20:21 +08:00
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icon:
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2020-07-28 10:03:53 +08:00
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order: 21
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---
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2020-07-29 16:20:21 +08:00
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2020-07-28 10:03:53 +08:00
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## 基本用法
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用来负责文件上传,文件上传成功后会返回文件地址,这个文件地址会作为这个表单项的值,整个表单提交的时候,其实提交的是文件地址,文件上传已经在这个控件中完成了。
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2021-01-07 23:35:03 +08:00
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```schema: scope="body"
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2020-07-28 10:03:53 +08:00
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{
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"type": "form",
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2021-01-19 10:20:09 +08:00
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"api": "https://3xsw4ap8wah59.cfc-execute.bj.baidubce.com/api/amis-mock/mock2/form/saveForm",
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2020-07-28 10:03:53 +08:00
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"controls": [
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{
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"type": "file",
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"name": "file",
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"label": "File",
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"accept": "*",
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2021-01-27 17:37:22 +08:00
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"receiver": "https://3xsw4ap8wah59.cfc-execute.bj.baidubce.com/api/amis-mock/upload/file"
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2020-07-28 10:03:53 +08:00
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}
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]
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}
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```
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2020-10-30 16:46:06 +08:00
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### 接口返回格式
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```json
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{
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"status": 0,
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"msg": "",
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"data": {
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"value": "xxxx"
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}
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}
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```
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- value:必须返回该字段用作回显,一般是文件资源地址
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2020-07-28 10:03:53 +08:00
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## 限制文件类型
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可以配置`accept`来限制可选择的文件类型,格式是文件后缀名`.xxx`
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2021-01-07 23:35:03 +08:00
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```schema: scope="body"
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2020-07-28 10:03:53 +08:00
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{
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"type": "form",
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2021-01-19 10:20:09 +08:00
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"api": "https://3xsw4ap8wah59.cfc-execute.bj.baidubce.com/api/amis-mock/mock2/form/saveForm",
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2020-07-28 10:03:53 +08:00
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"controls": [
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{
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"type": "file",
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"name": "file",
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"label": "限制只能上传csv文件",
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"accept": ".csv",
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2021-01-27 17:37:22 +08:00
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"receiver": "https://3xsw4ap8wah59.cfc-execute.bj.baidubce.com/api/amis-mock/upload/file"
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2020-07-28 10:03:53 +08:00
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}
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]
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}
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```
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想要限制多个类型,则用逗号分隔,例如:`.csv,.md`
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## 手动上传
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如果不希望 File 组件上传,可以配置 `asBlob` 或者 `asBase64`,采用这种方式后,组件不再自己上传了,而是直接把文件数据作为表单项的值,文件内容会在 Form 表单提交的接口里面一起带上。
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2021-01-07 23:35:03 +08:00
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```schema: scope="body"
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2020-07-28 10:03:53 +08:00
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{
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"type": "form",
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2021-01-19 10:20:09 +08:00
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"api": "https://3xsw4ap8wah59.cfc-execute.bj.baidubce.com/api/amis-mock/mock2/form/saveForm",
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2020-07-28 10:03:53 +08:00
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"debug": true,
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"controls": [
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{
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"type": "file",
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"name": "file",
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"label": "File",
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"accept": "*",
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"asBlob": true
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}
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]
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}
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```
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上例中,选择任意文件,然后观察数据域变化;点击提交,amis 自动会调整接口数据格式为`FormData`
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## 分块上传
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如果文件过大,则可能需要使用分块上传
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2020-11-13 15:21:41 +08:00
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## 自动填充
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上传成功后,可以通过配置 `autoFill` 将上传接口返回的值填充到某个表单项中:
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2021-01-07 23:35:03 +08:00
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```schema: scope="body"
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2020-11-13 15:21:41 +08:00
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{
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"type": "form",
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2021-01-19 10:20:09 +08:00
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"api": "https://3xsw4ap8wah59.cfc-execute.bj.baidubce.com/api/amis-mock/mock2/form/saveForm",
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2020-11-13 15:21:41 +08:00
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"controls": [
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{
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"type": "file",
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"name": "file",
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"label": "File",
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"accept": "*",
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2021-01-27 17:37:22 +08:00
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"receiver": "https://3xsw4ap8wah59.cfc-execute.bj.baidubce.com/api/amis-mock/upload/file",
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2020-11-13 15:21:41 +08:00
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"autoFill": {
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"myUrl": "${url}"
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}
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},
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{
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"type": "text",
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"name": "myUrl",
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"label": "url"
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}
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]
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}
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```
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上例中,file 组件上传后,接口返回格式例如如下:
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```json
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{
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2020-12-24 16:18:52 +08:00
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"status": 0,
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"msg": "",
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"data": {
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"value": "xxxxxxx",
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"filename": "xxxx.csv",
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"url": "http://xxxx.xxx.xxx"
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}
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2020-11-13 15:21:41 +08:00
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}
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```
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然后 file 上配置:
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```json
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"autoFill": {
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"myUrl": "${url}"
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}
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```
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这样上传成功后,会把接口中的 `url` 变量,赋值给 `myUrl` 变量
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2020-07-28 10:03:53 +08:00
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## 属性表
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除了支持 [普通表单项属性表](./formitem#%E5%B1%9E%E6%80%A7%E8%A1%A8) 中的配置以外,还支持下面一些配置
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2021-02-01 20:44:49 +08:00
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| 属性名 | 类型 | 默认值 | 说明 |
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| ---------------- | ------------------------------ | ---------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------ |
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| receiver | [API](../../../docs/types/api) | | 上传文件接口 |
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| accept | `string` | `text/plain` | 默认只支持纯文本,要支持其他类型,请配置此属性为文件后缀`.xxx` |
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| asBase64 | `boolean` | `false` | 将文件以`base64`的形式,赋值给当前组件 |
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| asBlob | `boolean` | `false` | 将文件以二进制的形式,赋值给当前组件 |
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2021-03-05 10:53:10 +08:00
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| maxSize | `number` | | 默认没有限制,当设置后,文件大小大于此值将不允许上传。单位为`B` |
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| maxLength | `number` | | 默认没有限制,当设置后,一次只允许上传指定数量文件。 |
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| multiple | `boolean` | `false` | 是否多选。 |
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| joinValues | `boolean` | `true` | [拼接值](./options#%E6%8B%BC%E6%8E%A5%E5%80%BC-joinvalues) |
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| extractValue | `boolean` | `false` | [提取值](./options#%E6%8F%90%E5%8F%96%E5%A4%9A%E9%80%89%E5%80%BC-extractvalue) |
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| delimiter | `string` | `,` | [拼接符](./options#%E6%8B%BC%E6%8E%A5%E7%AC%A6-delimiter) |
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| autoUpload | `boolean` | `true` | 否选择完就自动开始上传 |
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| hideUploadButton | `boolean` | `false` | 隐藏上传按钮 |
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| stateTextMap | object | `{ init: '', pending: '等待上传', uploading: '上传中', error: '上传出错', uploaded: '已上传', ready: '' }` | 上传状态文案 |
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| fileField | `string` | `file` | 如果你不想自己存储,则可以忽略此属性。 |
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2021-04-06 02:42:12 +08:00
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| nameField | `string` | `name` | 接口返回哪个字段用来标识文件名 |
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| valueField | `string` | `value` | 文件的值用那个字段来标识。 |
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| urlField | `string` | `url` | 文件下载地址的字段名。 |
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| btnLabel | `string` | | 上传按钮的文字 |
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2021-04-06 02:42:12 +08:00
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| downloadUrl | `boolean`或`string` | `""` 1.1.6 版本开始支持 `post:http://xxx.com/${value}` 这种写法 | 默认显示文件路径的时候会支持直接下载,可以支持加前缀如:`http://xx.dom/filename=` ,如果不希望这样,可以把当前配置项设置为 `false`。 |
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2021-02-01 20:44:49 +08:00
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| useChunk | `boolean`或`"auto"` | `"auto"` | amis 所在服务器,限制了文件上传大小不得超出 10M,所以 amis 在用户选择大文件的时候,自动会改成分块上传模式。 |
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| chunkSize | `number` | `5 * 1024 * 1024` | 分块大小 |
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| startChunkApi | [API](../../../docs/types/api) | | startChunkApi |
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| chunkApi | [API](../../../docs/types/api) | | chunkApi |
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| finishChunkApi | [API](../../../docs/types/api) | | finishChunkApi |
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