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https://github.com/Jermolene/TiddlyWiki5
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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: $:/plugins/tiddlywiki/aws/lambda
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! Template
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The template [[$:/plugins/tiddlywiki/aws/lambdas/main]] transcludes everything required to render a TiddlyWiki as an AWS Lambda function.
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The Lambda is build with this command:
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```
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tiddlywiki editions/aws --rendertiddler $:/plugins/tiddlywiki/aws/lambdas/main index.js text/plain
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```
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Or:
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```
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tiddlywiki editions/aws --build lambda
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```
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! Execution
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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:
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```
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{
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"commands": [
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"--aws","s3-rendertiddler","HelloThere","eu-west-2","my-bucket-name","rendered.html"
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],
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"tiddlers": [
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{
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"title": "HelloThere",
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"text": "Hello from {{Platform}}."
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},
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{
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"title": "Platform",
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"text": "TiddlyWiki"
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}
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]
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}
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```
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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:
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```
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var strPayload = JSON.stringify(payload);
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require("zlib").gzip(strPayload,function(err,buff) {
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var compressedPayload = {compressed: new Buffer(buff).toString("base64")};
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// Invoke lambda with compressed payload
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...
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});
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```
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! Return data
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If the Lambda function successfully executes it returns an object with the following fields:
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* ''lambda-result'': An array of `{bucketname,key}` pairs for each file written to S3 within the lambda function
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