Convert blob temporary path to File object
I
Taro-UI
found a problem when using it recently .
Problem appearance
When uploading an image, Taro-UI
only an image selector is provided to return the temporary path of the image, similar to the following:
{
"url":"blob:http://10.1.10.122:10086/4ebc5d64-bd9a-4994-8212-addf476ba2c2",
"file": {
"path":"blob:http://10.1.10.122:10086/4ebc5d64-bd9a-4994-8212-addf476ba2c2",
"size":370876,
"type":"image/jpeg",
"lastModifiedDate":"2020-12-23T02:38:35.661Z","lastModified":1608691115661,
"name":"1608691115661.jpeg"
}
}
You can see the basic information of the picture (size, type, long transfer time, picture name). All are included, including a blob:http:
temporary path starting with.
Solutions
This can't be passed directly to the backend, it needs to be converted to a File
format and passed through the multipart/form-data
protocol.
solution
Convert the temporary path into an File
object and add it form-data
.
// 其中
// imgObj = 上面那个对象
// imgObj.url = blob:http://10.1.10.122:10086/4ebc5d64-bd9a-4994-8212-addf476ba2c2
const imgBlob = await fetch(imgObj.url). then(r => r.blob())
const imgFile = new File([imgBlob], imgObj.file.name , {
type: imgBlob.type })
const formData = new FormData();
formData.append("file", imgFile);
const res: any = await http.post("/api/uploadFile",formData);