Online a lot of location, proxy_pass description of the left slash, concluded that the parrot, a variety of both, in order to completely understand this problem and decided to come to the law by comparing the test
Here to explain: Left slash /, is also considered to be a string
Here is my test results
Conclusions show: forwarding the results and whether to include location / nothing to do, and whether proxy_pass / no absolute relationship, said here absolutely, is to say, / for proxy_pass, it's just a string, and a, b, c nothing the difference
We use string instructions:
It is assumed to be matched path = location + path1
First, there must forward the results of all the strings proxy_pass
Secondly proxy_pass remove ip, after the port, if
A character string, forwarding result = proxy_pass + path1
No string, forwarding result = proxy_pass + path1