Is it possible to download PDF and save to mobile filesystem in React Native using Expo?

user_13848027 0
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I'm using Expo and React Native, but can't download PDF file and save it to filesystem. I don't find any examples and exact answer.

Is it possible to download PDF and then save it to docs?

expo react-native
1 Answers

Your goal can be achieved using expo-media-library and expo-file-system. Have a try this.

import React from 'react';
import { View, Button } from 'react-native';
import * as FileSystem from 'expo-file-system';
import * as Permissions from 'expo-permissions';
import * as MediaLibrary from 'expo-media-library';

class TestClass extends React.Component {
    constructor(props) {
        super(props)
    }

    async saveFile() {
        const { status } = await Permissions.askAsync(Permissions.CAMERA_ROLL);
        if (status === "granted") {

            FileSystem.downloadAsync("http://www.pdf995.com/samples/pdf.pdf", FileSystem.documentDirectory + 'test.pdf')
            .then( async ({uri}) => {
                await MediaLibrary.createAssetAsync(uri)
            }).catch((err) => {
               console.log(err)
            })
        }
    }
    render(){
        return(
            <View style={{flex : 1, justifyContent : 'center', alignItems: 'center'}}>
                <Button title="Create PDF" onPress={() => this.saveFile()}/>
            </View>
        )
    }
    
}
export default TestClass
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