s3-spa-upload
v2.1.5
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Upload a single page application to S3 with the right content-type and cache-control meta-data
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S3 SPA Upload
Upload a Single Page Application (React, Angular, Vue, ...) to S3 with the right content-type and cache-control meta-data.
This module uploads the local SPA's build directory to S3, overwriting what's currently on S3.
index.html
files are uploaded last, referenced JS/CSS files are uploaded first: so, users will only ever download index.html
files that work, even during deployments.
Note: There's no intelligence (yet) to only upload changed files. There's also no intelligence (yet) to split big files in chunks and do multipart upload.
This module requires the following AWS S3 permissions (see sample CloudFormation policy template below):
- s3:PutObject on objects in your bucket
- s3:ListBucket on your bucket (only needed when using --delete option)
- s3:DeleteObject on objects in your bucket (only needed when using --delete option)
Installation
To install globally (for CLI usage):
npm install -g s3-spa-upload
Command Line Usage
Basic usage:
s3-spa-upload dist-dir my-s3-bucket-name
Clean-up old files
To also clean up old files, use the --delete option. This will delete all files in the bucket that are not included in the current upload (limited to the supplied prefix, see below):
s3-spa-upload dist-dir my-s3-bucket-name --delete
Custom cache-control mapping
You can provide your desired cache-control mapping in a json file that contains a mapping from glob patterns to cache-control headers:
{
"index.html": "no-cache",
"*.js": "public,max-age=31536000,immutable"
}
Suppose your mapping file is called cache-control.json
:
s3-spa-upload dist-dir my-s3-bucket-name --cache-control-mapping cache-control.json
If you don't provide a custom mapping, the default will be used, which should be okay for most SPA's, see below.
Upload to a prefix
By default the SPA will be uploaded to the root of your S3 bucket. If you don't want this, specify the prefix to use:
s3-spa-upload dist-dir my-s3-bucket-name --prefix mobile
Note that when used in conjunction with --delete
, this means only old files matching that same prefix will be deleted.
Programmatic Usage
import s3SpaUpload from "s3-spa-upload";
// const s3SpaUpload = require('s3-spa-upload')
s3SpaUpload("dir", "bucket").catch(console.error);
// Can supply options:
const options = {
delete: true,
prefix: "mobile",
cacheControlMapping: {
"index.html": "no-cache",
"*.js": "public,max-age=31536000,immutable",
},
concurrency: 100, // max nr of files to upload to S3 in parallel
awsCredentials: {
accessKeyId: "...",
secretAccessKey: "...",
sessionToken: "...",
}, // Optional. If not provided explicitly, the AWS SDK will source credentials as usual
};
s3SpaUpload("dir", "bucket", options).catch(console.error);
Default Cache-Control settings
| File/ext | Cache setting | Description |
| ------------ | ----------------------------------------------------- | -------------------------------------------------------------------------------------------- |
| index.html
| public,max-age=60,stale-while-revalidate=2592000
| 1 minute, but allow stale content for 30 days, provided a cache refresh request is made also |
| css
| public,max-age=31536000,immutable
| As long as possible |
| js
| public,max-age=31536000,immutable
| As long as possible |
| png
| public,max-age=86400,stale-while-revalidate=2592000
| One day, but allow stale content for 30 days, provided a cache refresh request is made also |
| ico
| public,max-age=86400,stale-while-revalidate=2592000
| One day, but allow stale content for 30 days, provided a cache refresh request is made also |
| txt
| public,max-age=86400,stale-while-revalidate=2592000
| One day, but allow stale content for 30 days, provided a cache refresh request is made also |
Content-Type settings
Based on file extensions using https://www.npmjs.com/package/mime-types
AWS Policy Template
This CloudFormation IAM Policy template grants the needed permissions:
- Version: "2012-10-17"
Statement:
- Effect: Allow # This effect is only needed when using the --delete option
Action: s3:ListBucket
Resource: arn:aws:s3:::your-bucket-name
- Effect: Allow
Action:
- s3:DeleteObject # This action is only needed when using the --delete option
- s3:PutObject
Resource: arn:aws:s3:::your-bucket-name/*