mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-07-01 09:43:16 +00:00
d6a0b06f02
AWS imposes a limit of 16MB in my testing for the payload of a lambda. Compressing it enables us to pass x2-3 more data, thanks to the inefficiencies of JSON
58 lines
1.5 KiB
Plaintext
58 lines
1.5 KiB
Plaintext
title: $:/plugins/tiddlywiki/aws/lambda
|
|
|
|
! Template
|
|
|
|
The template [[$:/plugins/tiddlywiki/aws/lambdas/main]] transcludes everything required to render a TiddlyWiki as an AWS Lambda function.
|
|
|
|
The Lambda is build with this command:
|
|
|
|
```
|
|
tiddlywiki editions/aws --rendertiddler $:/plugins/tiddlywiki/aws/lambdas/main index.js text/plain
|
|
```
|
|
|
|
Or:
|
|
|
|
```
|
|
tiddlywiki editions/aws --build lambda
|
|
```
|
|
|
|
! Execution
|
|
|
|
The Lambda boot code looks for an array of tiddlers to load in `event.tiddlers`, and an array of commands to execute in `event.commands`. For example:
|
|
|
|
```
|
|
{
|
|
"commands": [
|
|
"--aws","s3-rendertiddler","HelloThere","eu-west-2","my-bucket-name","rendered.html"
|
|
],
|
|
"tiddlers": [
|
|
{
|
|
"title": "HelloThere",
|
|
"text": "Hello from {{Platform}}."
|
|
},
|
|
{
|
|
"title": "Platform",
|
|
"text": "TiddlyWiki"
|
|
}
|
|
]
|
|
}
|
|
|
|
```
|
|
|
|
The event data can optionally be compressed by passing a JSON object with a single property `compressed` that contains a base64 encoded GZIP compressed representation of the JSON payload data. For example:
|
|
|
|
```
|
|
var strPayload = JSON.stringify(payload);
|
|
require("zlib").gzip(strPayload,function(err,buff) {
|
|
var compressedPayload = {compressed: new Buffer(buff).toString("base64")};
|
|
// Invoke lambda with compressed payload
|
|
...
|
|
});
|
|
```
|
|
|
|
! Return data
|
|
|
|
If the Lambda function successfully executes it returns an object with the following fields:
|
|
|
|
* ''lambda-result'': An array of `{bucketname,key}` pairs for each file written to S3 within the lambda function
|