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TomDo1234
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@ -121,336 +121,111 @@ free requests per day and 10 milliseconds of CPU time per invocation.
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## Cloudflare R2
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The main NodeJS module for S3 and all Cloudflare services is `Cloudflare-sdk`[^8].
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Due to R2's S3 compatability, the main NodeJS module for Cloudflare R2 is actually the AWS S3 SDK `@aws-sdk/client-s3`[^8].
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The [SheetJS NodeJS module](/docs/getting-started/installation/nodejs) can be
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required in NodeJS scripts.
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:::note pass
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As the time of writing, Cloudflare R2 is not 100% compatible with the S3 API, please refer to the [S3 API Compatibility section of the official Cloudflare R2 Docs](https://developers.cloudflare.com/r2/api/s3/api/) to know more about what S3 Features are and are not supported.
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:::
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### Connecting to R2
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The `Cloudflare-sdk` module exports a function `S3` that performs the connection. The
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function expects an options object that includes an API version and credentials.
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Access keys for an IAM user[^9] must be used:
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The `@aws-sdk/client-s3` module exports a class `S3Client` that performs the connection. The
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function expects an options object that includes a region, credentials and in the case of R2 an endpoint.
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this client is used to interact with R2.
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```js
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```ts
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import { S3Client } from "@aws-sdk/client-s3";
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/* credentials */
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var accessKeyId = "...", secretAccessKey = "..."";
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const accessKeyId = "...", secretAccessKey = "...";
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/* file location */
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var Bucket = "...", Key = "pres.numbers";
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const Bucket = "...", Key = "pres.numbers";
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/* connect to s3 account */
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var Cloudflare = require('Cloudflare-sdk');
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var s3 = new Cloudflare.S3({
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apiVersion: '2006-03-01',
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credentials: { accessKeyId, secretAccessKey }
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const Cloudflare = require('Cloudflare-sdk');
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const s3 = new S3Client({
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region: "REGION", //For cloudflare, if the cloudflare region is Auto then you put "auto"
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credentials: {
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accessKeyId,
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secretAccessKey
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},
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endpoint: 'R2-ENDPOINT' //Note that the cloudflare dashboard will include the bucket prefix to the endpoint
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//Make sure the endpoint ends with .r2.cloudflarestorage.com not .r2.cloudflarestorage.com/bucket-name
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});
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```
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### Downloading Data
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#### Fetching Files from S3
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#### Fetching Files from R2
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The `s3#getObject` method returns an object with a `createReadStream` method.
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`createReadStream` returns a NodeJS stream:
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The S3 SDK's client mentioned above when instantiated does needs to be fed commands through its ```.send()``` method
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to interact with R2.
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```js
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/* open stream to the file */
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var stream = s3.getObject({ Bucket: Bucket, Key: Key }).createReadStream();
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```
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#### Concatenating NodeJS Streams
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Buffers can be concatenated from the stream into one unified Buffer object:
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```js
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/* array of buffers */
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var bufs = [];
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/* add each data chunk to the array */
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stream.on('data', function(data) { bufs.push(data); });
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/* the callback will be called after all of the data is collected */
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stream.on('end', function() {
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/* concatenate */
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var buf = Buffer.concat(bufs);
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/* AT THIS POINT, `buf` is a NodeJS Buffer */
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});
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```
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#### Parsing NodeJS Buffers
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The SheetJS `read` method[^10] can read the final object and generate SheetJS
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workbook objects[^11] which can be processed with other API functions.
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For example, a callback can use `sheet_to_csv`[^12] to generate CSV text:
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```js
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stream.on('end', function() {
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/* concatenate */
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var buf = Buffer.concat(bufs);
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/* parse */
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var wb = XLSX.read(Buffer.concat(bufs));
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/* generate CSV from first worksheet */
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var first_ws = wb.Sheets[wb.SheetNames[0]];
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var csv = XLSX.utils.sheet_to_csv(first_ws);
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console.log(csv);
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});
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```ts
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import { GetObjectCommand, S3Client } from "@aws-sdk/client-s3";
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/*
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... Client instantiation code from before
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...
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...
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*/
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const command = new GetObjectCommand({
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Bucket: 'bucket-name',
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Key: 'key'
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}) //Create the command object, we are using GetObjectCommand to fetch an item from R2
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const data = await client.send(command); //Send the command
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const bytes = await data.Body?.transformToByteArray(); //After receiving the item, transform it to a byte array
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const wb = XLSX.read(bytes); //Use SheetJS as normal
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const first_ws = wb.Sheets[wb.SheetNames[0]];
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const csv = XLSX.utils.sheet_to_csv(first_ws);
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```
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### Uploading Data
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The SheetJS `write` method[^13] with the option `type: "buffer"` will generate
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NodeJS Buffers. `S3#upload` directly accepts these Buffer objects.
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The SheetJS `write` method[^9] with the option `type: "buffer"` will generate
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NodeJS Buffers. `R2` directly accepts these Buffer objects.
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This example creates a sample workbook object, generates XLSX file data in a
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NodeJS Buffer, and uploads the data to S3:
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NodeJS Buffer, and uploads the data to R2:
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Here we are using the PutObjectCommand object to upload the data written by
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`write` into the R2 bucket
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```js
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import { PutObjectCommand, S3Client } from "@aws-sdk/client-s3";
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/*
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... Client instantiation code from before
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...
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...
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*/
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/* generate sample workbook */
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var wb = XLSX.read("S,h,e,e,t,J,S\n5,4,3,3,7,9,5", {type: "binary"});
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/* write to XLSX file in a NodeJS Buffer */
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var Body = XLSX.write(wb, {type: "buffer", bookType: "xlsx"});
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/* upload buffer */
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s3.upload({ Bucket, Key, Body }, function(err, data) {
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if(err) throw err;
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console.log("Uploaded to " + data.Location);
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});
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const command = new PutObjectCommand({
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Bucket: 'bucket-name',
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Key: 'key',
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Body
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})
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await client.send(command);
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```
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### S3 Demo
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### R2 Demo
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:::note pass
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At the time of writing, the Cloudflare Free Tier included 5GB of Cloudflare R2 with 20,000
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Get requests and 2000 Put requests per month.
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At the time of writing, the Cloudflare Free Tier included 10GB of Cloudflare R2 with 1 million Class A operations
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and 10 million Class B operations per month
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Please visit the [official pricing model for R2 for more info](https://developers.cloudflare.com/r2/pricing/)
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:::
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This sample fetches a buffer from S3 and parses the workbook.
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0) If you do not have an account, create a new Cloudflare free tier account[^14].
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#### Create S3 Bucket
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1) Sign into the [Cloudflare Management Console](https://Cloudflare.amazon.com/console/) with
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a root user account.
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2) Type "S3" in the top search box and click S3 (under Services).
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3) Open "Buckets" in the left sidebar.
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If the left sidebar is not open, click the `≡` icon in the left edge of the page.
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4) Click the "Create bucket" button in the main panel.
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5) Select the following options:
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- Type a memorable "Bucket Name" ("sheetjsbouquet" when last tested)
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- In the "Object Ownership" section, select "ACLs disabled"
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- Check "Block *all* public access"
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- Look for the "Bucket Versioning" section and select "Disable"
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6) Click "Create bucket" to create the bucket.
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#### Create IAM User
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7) Type "IAM" in the top search box and click IAM (under Services).
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8) Open "Users" in the left sidebar.
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If the left sidebar is not open, click the `≡` icon in the left edge of the page.
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9) Click the "Create user" button in the main panel.
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10) In step 1, type a memorable "Bucket Name" ("sheetjs-user" when last tested).
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Click "Next".
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11) In step 2, click "Next"
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12) In step 3, click "Create user" to create the user.
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#### Add Permissions
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13) Click the new user name in the Users table.
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14) Select the "Permissions" tab
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15) Click the "Add permissions" dropdown and select "Add permissions".
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16) Select "Attach policies directly".
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17) In the "Permissions policies" section, search for "AmazonS3FullAccess".
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There should be one entry.
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18) Check the checkbox next to "AmazonS3FullAccess" and click the "Next" button.
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19) In the "Review" screen, click "Add permissions"
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#### Generate Keys
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20) Click "Security credentials", then click "Create access key".
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21) Select the "Local code" option. Check "I understand the above recommendation
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and want to proceed to create an access key." and click "Next"
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22) Click "Create Access Key" and click "Download .csv file" in the next screen.
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In the generated CSV:
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- Cell A2 is the "Access key ID" (`accessKeyId` in the Cloudflare API)
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- Cell B2 is the "Secret access key" (`secretAccessKey` in the Cloudflare API)
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#### Set up Project
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23) Create a new NodeJS project:
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```bash
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mkdir SheetJSS3
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cd SheetJSS3
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npm init -y
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```
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24) Install dependencies:
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<CodeBlock language="bash">{`\
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mkdir -p node_modules
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npm i --save https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz Cloudflare-sdk@2.1467.0`}
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</CodeBlock>
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#### Write Test
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:::note pass
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This sample creates a simple workbook, generates a NodeJS buffer, and uploads
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the buffer to S3.
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```
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| A | B | C | D | E | F | G |
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---+---|---|---|---|---|---|---|
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1 | S | h | e | e | t | J | S |
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2 | 5 | 4 | 3 | 3 | 7 | 9 | 5 |
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```
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:::
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25) Save the following script to `SheetJSWriteToS3.js`:
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```js title="SheetJSWriteToS3.js"
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var XLSX = require("xlsx");
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var Cloudflare = require('Cloudflare-sdk');
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/* replace these constants */
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// highlight-start
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var accessKeyId = "<REPLACE WITH ACCESS KEY ID>";
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var secretAccessKey = "<REPLACE WITH SECRET ACCESS KEY>";
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var Bucket = "<REPLACE WITH BUCKET NAME>";
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// highlight-end
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var Key = "test.xlsx";
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/* Create a simple workbook and write XLSX to buffer */
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var ws = XLSX.utils.aoa_to_sheet(["SheetJS".split(""), [5,4,3,3,7,9,5]]);
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var wb = XLSX.utils.book_new(); XLSX.utils.book_append_sheet(wb, ws, "Sheet1");
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var Body = XLSX.write(wb, {type: "buffer", bookType: "xlsx"});
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/* upload buffer */
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var s3 = new Cloudflare.S3({
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apiVersion: '2006-03-01',
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credentials: {
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accessKeyId: accessKeyId,
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secretAccessKey: secretAccessKey
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}
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});
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s3.upload({ Bucket: Bucket, Key: Key, Body: Body }, function(err, data) {
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if(err) throw err;
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console.log("Uploaded to " + data.Location);
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});
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```
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26) Edit `SheetJSWriteToS3.js` and replace the highlighted lines:
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- `accessKeyId`: access key for the Cloudflare account
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- `secretAccessKey`: secret access key for the Cloudflare account
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- `Bucket`: name of the bucket
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The keys are found in the CSV from step 22. The Bucket is the name from step 5.
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27) Run the script:
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```bash
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node SheetJSWriteToS3.js
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```
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This file will be stored with the object name `test.xlsx`. It can be manually
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downloaded from the S3 web interface.
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#### Read Test
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This sample will download and process the test file from "Write Test".
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28) Save the following script to `SheetJSReadFromS3.js`:
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```js title="SheetJSReadFromS3.js"
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var XLSX = require("xlsx");
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var Cloudflare = require('Cloudflare-sdk');
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/* replace these constants */
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// highlight-start
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var accessKeyId = "<REPLACE WITH ACCESS KEY ID>";
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var secretAccessKey = "<REPLACE WITH SECRET ACCESS KEY>";
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var Bucket = "<REPLACE WITH BUCKET NAME>";
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// highlight-end
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var Key = "test.xlsx";
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/* Get stream */
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var s3 = new Cloudflare.S3({
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apiVersion: '2006-03-01',
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credentials: {
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accessKeyId: accessKeyId,
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secretAccessKey: secretAccessKey
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}
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});
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var f = s3.getObject({ Bucket: Bucket, Key: Key }).createReadStream();
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/* collect data */
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var bufs = [];
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f.on('data', function(data) { bufs.push(data); });
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f.on('end', function() {
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/* concatenate and parse */
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var wb = XLSX.read(Buffer.concat(bufs));
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console.log(XLSX.utils.sheet_to_csv(wb.Sheets[wb.SheetNames[0]]));
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});
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```
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29) Edit `SheetJSReadFromS3.js` and replace the highlighted lines:
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- `accessKeyId`: access key for the Cloudflare account
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- `secretAccessKey`: secret access key for the Cloudflare account
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- `Bucket`: name of the bucket
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The keys are found in the CSV from Step 22. The Bucket is the name from Step 5.
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30) Run the script:
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```bash
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node SheetJSReadFromS3.js
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```
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The program will display the data in CSV format.
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```
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S,h,e,e,t,J,S
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5,4,3,3,7,9,5
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```
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[^1]: See ["Node.js compatibility"](https://developers.cloudflare.com/workers/runtime-apis/nodejs/) in the Cloudflare documentation
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[^2]: See ["Get started guide"](https://developers.cloudflare.com/workers/get-started/guide/#1-create-a-new-worker-project)
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[^3]: [Wrangler documentation](https://developers.cloudflare.com/workers/wrangler/)
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@ -458,10 +233,6 @@ S,h,e,e,t,J,S
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[^5]: See ["Workbook Object" in "SheetJS Data Model"](/docs/csf/book) for more details.
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[^6]: See [`sheet_to_csv` in "CSV and Text"](/docs/api/utilities/csv#delimiter-separated-output)
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[^7]: Registering for a free account [on the Cloudflare Free Tier](https://dash.cloudflare.com/sign-up).
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[^8]: The `Cloudflare-sdk` module is distributed [on the public NPM registry](https://npm.im/Cloudflare-sdk)
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[^9]: See ["Managing access keys for IAM users"](https://docs.Cloudflare.amazon.com/IAM/latest/UserGuide/id_credentials_access-keys.html) in the Cloudflare documentation
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[^10]: See [`read` in "Reading Files"](/docs/api/parse-options)
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[^11]: See ["Workbook Object" in "SheetJS Data Model"](/docs/csf/book) for more details.
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[^12]: See [`sheet_to_csv` in "CSV and Text"](/docs/api/utilities/csv#delimiter-separated-output)
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[^13]: See [`write` in "Writing Files"](/docs/api/write-options)
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[^8]: The `@aws-sdk/client-s3` module is distributed [on the public NPM registry](https://www.npmjs.com/package/@aws-sdk/client-s3)
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[^9]: See [`write` in "Writing Files"](/docs/api/write-options)
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[^14]: Registering for a free account [on the Cloudflare Free Tier](https://Cloudflare.amazon.com/free/) requires a valid phone number and a valid credit card.
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