i junior programming , work on rest api, have question title shows. mean, how server process rest api request? create new file , store data in new-created file? store data in single（only one）file database does？ example：
post http://www.example.com/customers
post http://www.example.com/customers/12345/orders
what server these 2 request? advice appreciated.
post http's unconstrained method: can anything. disadvantage requests neither idempotent nor safe, means clients cannot safely repeat requests without risking unintended side-effects.
for little while, http spec worded bit strange saying "post creates child resource." has been cleaned in updated version, , post described unconstrained method is: server can anything, meaning can store, or process, or else.
http/1.1 semantics: https://tools.ietf.org/html/rfc7231#section-4.3.3
get , put bit different because when using them, assumption can used idempotently (get) or safely (put). other http methods fit framework of being idempotent, safe, or none of those.
not recommend ever, in theory have working http rest api using post, because post can anything. badly designed api, lack lot of advantages well-designed http rest apis have.
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