GET or POST for an Export RFQ Form: Where the Buyer's Inquiry Data Is Sent

The RFQ form’s method attribute decides where the buyer’s inquiry data physically sits in the request: GET places identifying key=value pairs in the query component of the request target, while POST sends the data to the server in the request body whose type is indicated by Content-Type. Both methods are allowed in HTML forms, so this is a real build-time choice rather than a theoretical one. GET is documented for requesting data and should not contain a body, and sending a body with GET has undefined semantics that some servers may reject with a 4XX client error. POST is designed to provide a block of data, such as the result of submitting a form, to a data-handling process, and its body encoding is set by the form’s enctype attribute. The method choice is a representation decision, not an encryption, secrecy or spam-protection control: POST syntax also permits an optional query component, POST is cacheable when freshness information is included, and POST is neither safe nor idempotent, so successive identical submissions may have additional effects. The article closes with a method-selection decision and a verification step limited to reading the attribute that governs the submission, while endpoint, validation, storage and logging responsibilities stay explicitly outside the method choice.

The decision: where the inquiry data sits in the request

When a buyer fills in an RFQ form and presses submit, the inquiry data has to be placed somewhere in the HTTP request. The form’s method attribute is what selects between the two placements, and the two placements are genuinely different: one puts the data in the URL, the other puts it in the request body.

Under GET, the request target carries an optional query component preceded by a question mark, and that query component is often used to carry identifying information in the form of key=value pairs. The method itself is documented as requesting a representation of the specified resource, and requests using GET should only be used to request data and should not contain a body.

Under POST, the method sends data to the server, and the type of the request body is indicated by the Content-Type header. The inquiry data therefore travels in the body rather than in the request target.

This is a real choice for an RFQ form rather than a theoretical one, because both GET and POST are allowed in HTML forms. The method attribute is not a form-builder default that can be ignored; it is the switch that determines which of the two representations the buyer’s inquiry data takes.

MDN reference

What GET actually does with an RFQ submission

A GET-submitted RFQ is a poor fit for a multi-field inquiry, and the reason is structural rather than stylistic. GET requests should only be used to request data and should not contain a body, so the only place the inquiry data can go is the query component of the request target. That component is optional and is often used to carry identifying information as key=value pairs, which means every field the buyer filled in has to be serialized into the URL.

The method properties explain why a submitted RFQ behaves like a repeatable resource request under GET. GET is safe, idempotent and cacheable, and a GET request has no body while its successful response does. Those properties are appropriate for fetching a page; they are a mismatch for an inquiry that is supposed to reach a salesperson as a one-off event.

If a form is configured to send a body with GET anyway, the documented behaviour is not a clean failure. The semantics of sending a message body in GET requests are undefined, and some servers may reject the request with a 4XX client error response. That is the boundary the reader needs to hold: the outcome is not specified by the method, and it is not guaranteed to be a graceful one.

Hypothetical request line for illustration only; not a real endpoint or observed submission.

GET /rfq?product_model=MODEL-A&quantity=500&buyer_note=please+quote HTTP/1.1
Host: example.com

What POST actually does with an RFQ submission

POST sends data to the server, and the type of the request body is indicated by the Content-Type header. HTML forms typically send data using POST, and this usually results in a change on the server. That combination is what makes POST the method that matches an RFQ submission: the inquiry is a block of data handed to a data-handling process, not a request for a representation.

Choosing POST does not by itself decide how the inquiry data is formatted. For HTML forms the format and encoding of the body content is determined by the enctype attribute of the form element, or by a control-level formenctype attribute on an input or button. The method and the encoding are two separate decisions, and the second one has to be made deliberately.

With application/x-www-form-urlencoded, the keys and values are encoded in key-value tuples separated by an ampersand, with an equals symbol between the key and the value. Non-alphanumeric characters in both keys and values are percent-encoded, which is the reason this type is not suitable for binary data. A form using this encoding sends a request whose body contains the form data in key=value pairs separated by an ampersand.

With multipart/form-data, each value is sent as a block of data, with a user agent-defined delimiter separating each part, and the keys are described in the Content-Disposition header of each part. This encoding is used when a form includes files or a lot of data, and the request body delineates each part using a boundary string. If the RFQ form carries a technical drawing or other attachment, this is the encoding that matches the fields the form carries.

Hypothetical request body for illustration only; invented field names and non-personal sample values, not a real endpoint or observed submission.

POST /rfq HTTP/1.1
Host: example.com
Content-Type: application/x-www-form-urlencoded

product_model=MODEL-A&quantity=500&buyer_note=please+quote

What the method choice does not guarantee

The method choice is a representation decision, not an encryption, secrecy or spam-protection control. POST places form data in the body, but the POST request syntax also permits an optional query component preceded by a question mark, so a POST form can still place data in the URL. Choosing POST does not by itself settle what appears in the request target.

Caching behaviour is not eliminated by the method alone either. POST is cacheable when freshness information is included, so the method does not remove the possibility that a response is cached. The method properties also record that POST is neither safe nor idempotent, and successive identical POST requests may have additional effects, such as creating the same order several times. A buyer who resubmits an RFQ is therefore not guaranteed to produce a single inquiry.

These are the assumptions the method choice does not settle: that the inquiry data is private, that it is never cached, and that resubmission is harmless. The documented method semantics do not support any of them, and the team still has to handle validation, storage and logging as separate responsibilities.

Choosing the method for your RFQ form and what to verify afterwards

POST is the method that matches submitting a block of form data to a data-handling process, while GET is documented for requesting data. For an RFQ form whose purpose is to deliver the buyer’s inquiry to a salesperson, POST is the method that fits the job, and both methods remain allowed in HTML forms so the choice is yours to make explicitly rather than inherit.

The effective method is read from the form’s method attribute, and a button-level formmethod override can change it. The method-selection check is therefore to read the attribute that governs the submission on the live page, not to assume the value from the form markup alone. The separate question of which control actually owns and submits the form is a different decision and is covered in the external submit button reading.

The enctype must match the fields the form carries, particularly if a drawing or other file is attached. The endpoint, server-side validation, storage and logging behaviour remain separate responsibilities that the method choice does not define, and they should be verified on their own terms rather than assumed from the method attribute.