Stack Overflow Asked by Xaver Fleer on January 6, 2021
My ultimate goal is to fetch an image from a credential secured API (someServer.com
) with my website.
Since I want to keep credentials in the backend, I trigger call a JavaScript Netlify Function. This function has access to the key process.env.CREDENTIALS
that contains the credentials.
My function can retrieve the image, but I don’t know how to forward it to the frontend.
Code I executed:
const fetch = require("node-fetch").default;
exports.handler = (event, context, callback) => {
const url = "https://someServer.com/myImage";
fetch(url, {
headers: { Authorization: `Bearer ${process.env.CREDENTIALS}` },
})
.then((response) => {
callback(null, {
statusCode: 200,
body: response.blob(),
});
})
.catch((e) => console.log(`Catching error: ${e}`));
};
returned
Fetching image
Response with status 200 in 120 ms.
Catching error: TypeError [ERR_INVALID_ARG_TYPE]: The first argument must be one of type string or Buffer. Received type object
What is the correct way to return the image to the frontend?
Milestone 01
I managed to proxy the image on localhost with
const fetch = require("node-fetch").default;
exports.handler = (event, context, callback) => {
const url = "https://someServer.com/myImage";
fetch(url, {
headers: { Authorization: `Bearer ${process.env.NINOX_API_KEY_SLANZ}` },
})
.then((response) => response.blob())
.then((blob) => blob.arrayBuffer())
.then((buffer) => {
callback(null, {
statusCode: 200,
body: new Buffer.from(buffer),
});
})
.catch((e) => console.log(`Catching error: ${e}`));
};
This works locally with netlify-lambda
, however it does not work on AWS. biphobe "Netlify’s Functions, just like AWS Lambda’s, need the body to to be a string."
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