React Native:如何获取文件大小、mime 类型和扩展名? [英] React native: how to get file size, mime type and extension?

问题描述

我知道 react-native-fs 和 react-native-fetch-blob，但我缺少简单的辅助函数，例如 getFileInfo(file).

I know react-native-fs and react-native-fetch-blob, but I'm missing simple helper functions like getFileInfo(file).

所需的伪代码:

let fileInfo = getFileInfo('path/to/my/file.txt');
console.log('file size: ' + fileInfo.size);
console.log('mime type: ' + fileInfo.type);
console.log('extension: ' + fileInfo.extension);

获取文件大小、mime 类型和扩展名的正确方法是什么?

What's the proper way to get the file size, mime type and extension?

提前致谢！

推荐答案

使用react-native-fetch-blob，你可以通过以下代码获取文件大小:

With react-native-fetch-blob, you can get the file size with the code below:

RNFetchBlob.fs.stat(PATH_OF_THE_TARGET)
.then((stats) => {})
.catch((err) => {})

响应 stats 包含以下信息:

The response stats contains the following info:

{
     // file name
     filename : 'foo.png',
     // folder of the file or the folder itself
     path : '/path/to/the/file/without/file/name/',
     // size, in bytes
     size : 4901,
     // `file` or `directory`
     type : 'file',
     // last modified timestamp
     lastModified : 141323298
}

来源:https://github.com/wkh237/react-native-fetch-blob/wiki/File-System-Access-API#user-content-statpathstringpromisernfetchblobstat

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