How to Send Complex Filters Safely and Cacheably — Introducing HTTP QUERY Method (RFC 10008)

# 🧩 How to Pass a Request Body in a GET Request? Meet the New HTTP QUERY Method (RFC 10008)

“The IETF published RFC 10008 in June 2026—a brand-new HTTP method called QUERY. Unlike POST, it is both safe and idempotent while supporting arbitrary request bodies.”

Why This Matters

“Developers have long struggled between leaking sensitive filter data via URL query strings or breaking cacheability by using POST for searches. QUETHOD finally aligns architectural ideals—safe retrieval semantics with rich payloads—enabling reliable retries after network failures without risking duplicate side effects.”

Key Insights

• “Fact/source: RFC 10008 was finalized in June 2026 by IETF. Concept/example: QUETH supports nested conditions—e.g., price_range + OR logic across brands—that are awkward to encode in query parameters. Example payload includes arrays of tags and boolean operators.” Tool/user: Cloudflare caches via path + body hash; Fastly uses set req.hash += req.body;.
• “Fact/source: Before RFC 1008 there was no standard way to send request bodies safely – GET ignores them while POST changes semantic intent.” Concept/example: A typical Advanced Product Search sends filters inside JSON under an and/or clause – impossible with pure query strings due length limits (~2000 chars) . Tool/user: express.js intercepts raw method string (req.method === 'QUETH') before routing.
• “Fact/source: cache keys now incorporate body hashes per §4 of RFC 8008 – required by all compliant CDNs .” Concept/example : fetch API call sets method :'QUETH' plus body :JSON .stringify(filters) making retry safe . tool /user : grafana /prometheus treat queth as custom verb pending native classification

Working Examples

async function searchProducts(filters) {
const response = await fetch('https://shop.com/api/products', {
method:'QUETH',
headers:{'Content-Type':'application/json'},	body:'JSON.stringify(filters)'};	
return response.json();},

Practical Applications

References:

• From internal analysis