API to return image in Node JS

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In this article, we will show you, how you can return an image from the response of an API in Node JS.

Video tutorial:

First, I will create an image tag and set the “src” attribute as the path of the API. I also send “adnan” as an argument so the server will know which image to fetch.

<img src="/showImage/adnan" />

Then I am going to create a GET API in Node JS.

const fs = require("fs")

app.get("/showImage/:name", async function (request, result) {
  const name = request.params.name
  const image = await db.collection("images")
    .findOne({
      name: name
    })
  if (image == null) {
    let defaultImage = await fs.readFileSync("public/default.jpg")
    defaultImage = Buffer.from(defaultImage, "base64")
    
    result.writeHead(200, {
      "Content-Type": "image/jpg",
      "Content-Length": defaultImage.length
    })
    result.end(defaultImage)
    return
  }
  
  const imageContent = await fs.readFileSync(image.path)
  
  result.writeHead(200, {
    "Content-Type": "image/jpg",
    "Content-Length": imageContent.length
  })
  result.end(imageContent)
  return
})

If you run the code now, you will be able to see the image.

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Published by adnanafzal565