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Serving HTML and JSON Responses

Explore how to build a Node.js server that serves dynamic HTML and JSON responses. Understand setting Content-Type headers and HTTP status codes to properly communicate with clients. Practice reading JSON files and generating HTML content programmatically to handle different routes, including error handling for unmatched requests.

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In modern applications, servers need to handle diverse content types. For example, HTML is used for rendering web pages, and JSON is used for exchanging structured data, commonly in APIs. To handle these use cases, servers must include headers to specify the format of their responses.

The Content-Type header in HTTP responses is particularly important as it tells clients (like browsers or API consumers) how to interpret the returned data. For example:

  • text/html specifies HTML content for rendering web pages.

  • application/json denotes structured data formatted as JSON.

  • text/plain indicates plain text.

Setting the correct Content-Type ensures the client interprets the response correctly, enabling seamless communication between servers and clients.

Building a server for HTML and JSON responses

Let’s create a server that responds with HTML content for one route and JSON data for ...