Differences between x-www-form-urlencoded and JSON in HTTP POST requestsWhen

Struggling to make a decision,
I am currently using php lib curl to send data as x-www-form-urlencoded with the following code:

curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($this->arguments));

or

curl_setopt($curl, CURLOPT_POSTFIELDS, $this->arguments);

First question: The second option appears to have a larger content length, so maybe the first solution is better?

This method works well for simple messages like:

{
    "name": "John",
    "token": "2121232145",
    "code": "7",
    "data": "Hello"
}

However, if I have a data field that represents an object, encoding it into a URL can lead to verbose and messy messages,

On the flip side, I attempted sending it as application/json content-type

curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($this->arguments));

The content-length may be longer for small messages, but when embedding JSON, this method is clearly superior.

Yet, x-www-form-urlencoded closely resembles the form data I need to send, except when a JSON is embedded.

Having two different servlet parse methods based on content types would not be elegant, so is there an alternative?

Answer №1

Check out this link for more insights on the discussion regarding data formats.

If the data structure is simple and consists of name-value pairs, x-www-form-urlencoded should suffice. However, if the structure can be complex with nested lists or arrays, JSON would be a better choice.

Personally, I prefer keeping things simple and efficient. Using x-www-form-urlencoded results in clear and concise data that is easy to read and manage, without unnecessary overheads like extra time, memory, and CPU usage associated with JSON/XML formats.

Answer №2

x-www-form-urlencoded and JSON serve different purposes. While x-www-form-urlencoded is the default content type for submitting forms, JSON is a standardized text-based format used for structured data transmission over networks. It's important not to compare them directly.

The second option may have a larger content length, but that doesn't necessarily make it the better choice?

There isn't a one-size-fits-all "better" solution. As pinepain mentioned, the decision depends on the type of data being sent and how it needs to be processed. JSON is ideal for transmitting additional structured data with requests.

Instead of focusing on content-length, consider the nature of the data and its structure. If you need to send and process varied structured data between requests, JSON is designed for this purpose.

The difference in Content-Length between the two methods shouldn't be a concern unless your application is at an immense scale like Facebook or Google. Premature optimization can lead to issues, so prioritize functionality over minor performance differences.

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