Mastering Put Request in API: A Comprehensive Guide
Published: 2024-01-17 05:50:29

**APIs**, or **Application Programming Interfaces**, fundamentally act as the communication conduits between varying software applications, much like interpreters who allow two people speaking different languages to understand each other. APIs define a set of protocols and tools for building application software, effectively bridging the gap between different software programs and allowing them to exchange data in a streamlined and secure fashion. Imagine APIs as the connectors that facilitate your smartphone apps to access server-side information and deliver it back to you, enhancing user experiences and interactivity.

![API](https://assets.apidog.com/blog/2024/01/image-55.png)

Consider booking a ride through a smartphone app – the app queries the transport company’s server through an API to retrieve real-time updates on driver location, estimated time of arrival, and more, thus seamlessly relaying this information to your screen.

APIs are the digital glue bonding disparate systems, ensuring they function in unison with efficiency and ease.

## Understanding the PUT Request Dynamics

In the realm of web protocols, the **PUT [request](https://apidog.com/blog/http-methods/)** represents an instrument of the HTTP specification used to modify or replace the content at a given URL. When made to an existing resource, a PUT request acts like a complete overwrite, mirroring the action of saving over a file on one's desktop – the previous content is replaced entirely by the new data provided.

![PUT Request](https://assets.apidog.com/blog/2024/01/image-57.png)

A PUT request carries request payload, and upon a successful operation, it may elicit various responses from the server:

    PUT /updated-page.html HTTP/1.1
    Host: www.example.com
    Content-type: text/html
    Content-length: 18
    
    <h1>Updated Content</h1>

Should the resource be non-existent initially and is subsequently created, a **201 (Created)**  response is appropriate, indicating successful resource creation. If modification of an existing resource takes place without a hitch, a **200 (OK)**  or **204 (No Content)**  response signifies the successful completion of the operation.

- **[How to make a PUT Request in Python (2024 Guide)](https://apidog.com/blog/python-put-request/)**

## The Mechanics Behind a PUT Request

When you dispatch an HTTP PUT request, you're essentially informing the server that you intend to place the enclosed data at a specific URL. If the URL indicates an available resource, that resource is entirely replaced by the new data. If there's no pre-existing resource, the server may opt to create one under that URL.

## Comparing PUT and POST Requests


![POST Request vs PUT Request](https://assets.apidog.com/blog/2024/01/image-58.png)

While both PUT and POST requests play roles in data submission, a **PUT request** is uniquely **idempotent**, signifying that repeated identical requests will result in the same resource state without unintended side effects, which is analogous to saving a file multiple times. On the other hand, a sequence of equivalent **POST requests** could potentially generate different outcomes – akin to submitting a form multiple times, possibly resulting in multiple entries.

## Executing a PUT Request Using APIs

To perform a PUT request, you're required to clearly define the HTTP method as PUT, include the specific URL of the resource to be modified or replaced, and incorporate the payload that represents the updated information. Illustrated below is how you could achieve this using the Python `requests` library:

    import requests
    
    url = 'https://www.example.com/api/items/1'
    data = {'name': 'Updated item'}
    
    response = requests.put(url, json=data)

This piece of code sends updated information in the form of `data` to the server to modify the existing resource, with the server's response captured within the `response` object.

# PUT Request Creation and Verification on Apidog

**[Apidog](https://apidog.com/)** provides a suite of tools for end-to-end API lifecycle management, including designing, debugging, mocking, and automated testing – essentially combining the functions you’d find in Postman, Swagger, and JMeter to craft comprehensive API documentation and support debugging.

Here’s how you can leverage Apidog for crafting and testing a PUT request:

1、**Launch Apidog**: Initiate a new request creation within the platform.

![img](https://assets.apidog.com/blog/2024/01/image-59.png)
2、**Designate the HTTP Method**: Select PUT from the available HTTP methods.

![img](https://assets.apidog.com/blog/2024/01/image-60.png)
3、**Input Request Details**: Fill in the target resource's URL, and if necessary, add request headers and body data. Hit the “Send” button to execute the PUT request.

![img](https://assets.apidog.com/blog/2024/01/image-62.png)
4、**Evaluate the Response**: Review the server’s feedback to confirm the successful execution of your request.

![img](https://assets.apidog.com/blog/2024/01/image-63.png)

# Best Practices for Implementing PUT Requests in APIs

When working with PUT requests in an API context, here are some invaluable practices:

1.  **Standardized Response Conventions**: Consistency is key – maintain uniform response formats across all API endpoints.
2.  **Idempotent Updates**: Given PUT requests' idempotent nature, ensure repeated requests bear no unintended consequences, preserving resource states.
3.  **Resource-Oriented API Structure**: Adopt an approach that revolves around resource manipulation. Each resource, identifiable through a unique URI, should correspond to a particular entity within your system.
4.  **Align Operations with HTTP Methodology**: HTTP methods (GET, POST, PUT, PATCH, DELETE) should intuitively map to CRUD operations on resources, with PUT altering or replacing server-side resources.
5.  **HTTP Semantics Adherence**: Stay true to HTTP guidelines, choosing PUT to update/replace resources for a consistent and straightforward API.

## Responses Typical in PUT Requests

While response formats are API-specific, using a standardized convention aids in clarity. Some responses associated with PUT requests include:

*   **200 OK**: A signal of successful resource modification, invoking a translation of the underlying content.
*   **201 Created**: An indication of new resource creation, often specifying the resource's location through HTTP headers.
*   **409 Conflict**: Denotes versioning conflicts due to concurrent modifications by disparate sources.
*   **400 Bad Request**: Informs about a PUT request failure, usually accompanied by an explanation to aid troubleshooting.

### Concluding Thoughts

We've delved into the realm of HTTP with a specific focus on the **PUT** method, a tool for resource creation or modification on web servers. The method's idempotency underscores its difference from **POST**, another cornerstone of HTTP.

When it comes to API development, selecting the appropriate method is crucial – **PUT** shines for defined, named resources. With tools like **Apidog**, API creation, testing, and collaboration enter a new era of convenience, allowing teams to work in tandem productively. 🚀.

Remember to align your API with consistent strategies and methods for a smooth client experience and predictable interactions.