Change request URL slightly & Add content-type to request header
Change request URL slightly & Add content-type to request header

matsuu/isucon6-final,matsuu/isucon6-final,matsuu/isucon6-final,matsuu/isucon6-final,isucon/isucon6-final,isucon/isucon6-final,isucon/isucon6-final,isucon/isucon6-final,matsuu/isucon6-final,isucon/isucon6-final,matsuu/isucon6-final,isucon/isucon6-final,isucon/isucon6-final,matsuu/isucon6-final,matsuu/isucon6-final,isucon/isucon6-final