Is it possible to send a JSON file using res.send in NodeJs instead of res.json? What are the potential consequences of doing this and why is it recommended to avoid this practice?
Is it possible to send a JSON file using res.send in NodeJs instead of res.json? What are the potential consequences of doing this and why is it recommended to avoid this practice?
Referencing the express documentation:
This function is responsible for sending a JSON response. It takes the parameter provided and converts it into a JSON string using JSON.stringify(). The parameter can be of any JSON type such as object, array, string, Boolean, number, or null.
This function sends the HTTP response. The body parameter can be a Buffer object, a String, an object, Boolean, or an Array. It carries out various useful tasks for basic non-streaming responses, like automatically setting the Content-Length HTTP response header field (unless already defined) and providing support for automatic HEAD and HTTP cache freshness.
If the parameter is a Buffer object, the method will set the Content-Type response header field to “application/octet-stream” unless defined otherwise. If the parameter is a String, the Content-Type will be set to “text/html”. For Arrays or Objects, Express will respond with their JSON representation.
Regarding ExpressJS, when an HTTP request is received by the server of an Express application, it provides developers with an object called "res". For instance,
Illustration:
app.get('/test', (req, res) => {
// utilize req and res here
})
The res object represents the response that will be dispatched as part of the API call.
The res.send function specifies the content type to text/Html, indicating that the client will interpret it as text. It then sends back the response to the client.
On the other hand, the res.JSON method sets the content-type header to application/JSON, signifying that the client views the response string as a valid JSON object. It subsequently returns the response to the client.
When using res.send, you must ensure the conversion to a JSON object if necessary, whereas res.json does this automatically.
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