arg1 is 1st argument, arg2 is 2nd argument, 003.14
arg2 is 2nd argument, arg1 is 1st argument, 003.14
{'key1': '1', 'key2': ['21', '22']}
key1=1&key2%5B0%5D=21&key2%5B1%5D=22
a string with spaces and / and ? and &
a+string+with+spaces+and+%2F+and+%3F+and+%26
a string with spaces and / and ? and &
https://example.com?key2[]=21&key2[]=22
https://example.com?key1=1
https://example.com?key1=1&key2[]=21&key2[]=22&key3=3&key4[]=41&key4[]=42
https://example.com?key1=1&key3=3&key4[]=41&key4[]=42
https://example.com?key1[foo]=1&key1[bar]=2&key2[]=21&key2[]=22
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