Methods and request semantics
GET bodies, PUT and PATCH nuances
Framework acceptance does not imply interoperability.
Understand the concept
GET request content has no generally defined semantics. Intermediaries or clients may reject or ignore it; APIs such as Fetch disallow GET/HEAD bodies. Use query parameters or an explicit POST search contract for complex searches.
PUT intends replacement of a resource representation, with server-managed fields documented. PATCH describes partial modifications. JSON Patch and JSON Merge Patch differ in formats and the meaning of null, removals and array changes.
Apply a patch atomically, not half at a time. Use ETag/If-Match for concurrent edits. Treating every operation as POST can sacrifice useful semantics and contract clarity.
Build APIs that interoperate across clients and proxies.
Treating all JSON patch formats as equivalent.
One topic. Three levels of depth.
GET /products?category=books HTTP/1.1
Host: example.testA simple filter belongs in the query.
This page does not send requests to external servers. Messages are readable HTTP/1.1 illustrations, not HTTP/2 or HTTP/3 wire dumps. example.test is reserved for examples. Run commands and JavaScript only in your own test environment; never publish real tokens or cookies.
Try it yourself first.
Should you filter by sending a GET body through browser Fetch?
Show the solution and explanation
GET query or documented POST searchNo; respect client restrictions and HTTP semantics.