POST Request With Content-Length Header [Python Code]
In this POST request with a Content-Length Header Example, we make a POST request to the ReqBin echo URL and send the JSON data to the server. The client automatically adds a Content-Length header based on the size of the data being transferred. The client usually adds a Content-Type header depending on the type of data being transmitted. Click Send to make a POST request with Content-Length Header online and see the results. The Python code was automatically generated for the POST Request Content Length Header example.
Hypertext Transfer Protocol is an application-layer protocol for transferring data over the network, which is the core of the WWW (World Wide Web) and provides communication between HTTP clients (browser or mobile application) and servers. The HTTP protocol uses a client-server architecture to transfer data and is built on "request" and "response" messages. Any HTTP message consists of a request string, HTTP headers, and a message body.
What is a POST request?
The HTTP POST method requests the webserver to receive and process the data enclosed in the body of the POST message. The POST is one of the nine standard HTTP methods. The POST method is used to send data to the server, upload files and images, as well as for and send HTML forms. POST requests differ between GET and HEAD requests in that POST requests can change the server's state.
What does the Content-Length header mean?
A Content-Length header is a number that indicates the exact length of the HTTP body in bytes. The Content-Length header indicates the size of the data in the body of the request or response. The HTTP body begins immediately after the first blank line, after the initial line and headers. The actual length of the content transmitted over the network may differ from the size of the data in the body because servers can compress the data before sending it.
length: the length of the message body is specified in bytes.
How to add a Content-Length header to the POST request?
Clients (browser, mobile apps) automatically add a Content-Length header to the POST request based on the size of your data in the request. In this example, the Content-Length header indicates the size of the provided JSON.