/trade/trade_payment.htm?trade_no=2013103111001001620061296477&sign_signature=d_kx_a_u_u_j_zm2mh_gnq8_i_an_j_b_t_i_mdz_j7_t_x_k_qk%2B_jw_ipgr4_q_h_b1%2B_jj_ww_h_u0_q%3D%3D&sign_date=1383167968114&sign_from=3000&already_check=0&sign_account_no=20888023219546240156
上面这个url中&符号,被utf-8编码为&,造成使用
local sign_account_no = ngx.var['arg_sign_account_no']
这个ngx.var去取url参数报错,取道的一直都是nil,请问有什么好的解决方法么?