411 Length Required

When you encounter the 411 Length Required error. it means the server is asking for the “Content-Length” header to be included in the request.

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Introduction
In Action
Sample
Conclusion

Introduction

When you encounter the 411 Length Required error, it means the server is asking for the “Content-Length” header to be included in the request.

This header is essential as it specifies the size of the data being sent to the server. Without it, the server cannot process the request properly.

In Action

When you encounter the 411 Length Required error, it means your request is missing the “Content-Length” HTTP header, which specifies the size of the message body you’re sending to the server.

To resolve this, you need to include the appropriate “Content-Length” header in your request. However, in some cases, if you’re using the “Transfer-Encoding” header with the value “chunked,” the “Content-Length” header is not required, and you can send the data in size-specified blocks.

Make sure to address this error to ensure successful communication with the server.

Sample

In the example, the client tries to send a file to the server, but the server responds with a 411 Length Required error.

This means the server requires the client to specify the size of the file in the request’s “Content-Length” header, so it knows how much data to expect before saving it locally.

To resolve this, the client needs to include the “Content-Length” header with the correct file size in the request.

Request

PUT /docs HTTP/1.1
Host: www.example.com
Content-Type: applications/pdf

< PDF file included as message body>

Response

HTTP/1.1 411 Length Required

Conclusion

The 411 Length Required status code is returned by the server when a client’s HTTP request is missing the “Content-Length” header. This header is necessary to specify the size of the message body when sending data to the server.

To resolve this error, the client needs to include the “Content-Length” header with the appropriate file size in the request.