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Use HTTP 404 & forward Cache-Control, Content-Type, Expires, and Last-Modified headers from S3. #158

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Use HTTP 404 & forward Cache-Control, Content-Type, Expires, and Last-Modified headers from S3. #158

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088a5b9
Forward Expires and Last-Modified headers from S3.
john-shaffer Oct 23, 2019
5eb5c87
Forward Content-Type header from S3.
john-shaffer Oct 23, 2019
03a6e5b
Use HTTP 404 status code for non-existent files.
john-shaffer Oct 24, 2019
8393774
Apply Flythe's fix to formatting of datetimes in HTTP headers.
john-shaffer Nov 6, 2019
8d7e2a5
Merge branch 'master' of https://github.com/john-shaffer/serverless-i…
john-shaffer Nov 6, 2019
592cd16
Froward headers
vitalinfo Dec 20, 2019
74de982
Added conditions
vitalinfo Dec 20, 2019
502e1a0
Merge https://github.com/vitalinfo/serverless-image-handler
john-shaffer Dec 20, 2019
1176fd4
Only set ContentType and CacheControl on ImageRequest when they are d…
john-shaffer Dec 20, 2019
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16 changes: 14 additions & 2 deletions source/image-handler/image-request.js
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Original file line number Diff line number Diff line change
Expand Up @@ -46,11 +46,23 @@ class ImageRequest {
const request = s3.getObject(imageLocation).promise();
try {
const originalImage = await request;
if (originalImage.ContentType) {
this.ContentType = originalImage.ContentType;
}
if (originalImage.Expires) {
this.Expires = new Date(originalImage.Expires).toUTCString();
}
if (originalImage.LastModified) {
this.LastModified = new Date(originalImage.LastModified).toUTCString();
}
if (originalImage.CacheControl) {
this.CacheControl = originalImage.CacheControl;
}
return Promise.resolve(originalImage.Body);
}
catch(err) {
return Promise.reject({
status: 500,
status: ("NoSuchKey" == err.code) ? 404 : 500,
code: err.code,
message: err.message
})
Expand Down Expand Up @@ -235,4 +247,4 @@ class ImageRequest {
}

// Exports
module.exports = ImageRequest;
module.exports = ImageRequest;
12 changes: 8 additions & 4 deletions source/image-handler/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -22,9 +22,14 @@ exports.handler = async (event) => {
const request = await imageRequest.setup(event);
console.log(request);
const processedRequest = await imageHandler.process(request);
const headers = getResponseHeaders();
headers["Content-Type"] = request.ContentType;
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What if you are changing the image from a jpg to a png.

If i put
'toFormat' => 'png'
in my image settings but the source is a jpeg this will output image/jpg

headers["Expires"] = request.Expires;
headers["Last-Modified"] = request.LastModified;
headers["Cache-Control"] = request.CacheControl;
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Would it be possible to supply overridden values? In the base64 encoded string
{
"header": [{'Expires' : x }]
}

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Good catch, @bretto36. I'm not using either of those features (changing formats or base64), but I'll take a look when I get a chance.

const response = {
"statusCode": 200,
"headers" : getResponseHeaders(),
"headers" : headers,
"body": processedRequest,
"isBase64Encoded": true
}
Expand All @@ -51,8 +56,7 @@ const getResponseHeaders = (isErr) => {
const headers = {
"Access-Control-Allow-Methods": "GET",
"Access-Control-Allow-Headers": "Content-Type, Authorization",
"Access-Control-Allow-Credentials": true,
"Content-Type": "image"
"Access-Control-Allow-Credentials": true
}
if (corsEnabled) {
headers["Access-Control-Allow-Origin"] = process.env.CORS_ORIGIN;
Expand All @@ -61,4 +65,4 @@ const getResponseHeaders = (isErr) => {
headers["Content-Type"] = "application/json"
}
return headers;
}
}