This is way more useful than it is tested. Please be careful.
On Unixes, always run it with the flag -littleboss=start to ensure that the proxy always re-starts itself.
This is a very simple standalone HTTP Proxy for I2P based on the SAM Bridge. It has a few advantages in certain situations, especially for adapting applications that speak HTTP to the I2P network. It allows applications to start their own HTTP proxies, with their own identities within I2P and their own discrete configurations. It also has some disadvantages, it cannot add new readable names to your I2P address book nor is it able to use an outproxy. It's new, but it should be stable enough to experiment with a Tor Browser or a hardened Firefox configuration.
It is not, and is not intended to be, and will not be intended for use by multiple clients at the same time. It might be more-or-less OK as part of an inproxy but you should only use it for one client at a time. A multi-client solution will also be available soon(eeProxy).
This is not something you should use without understanding. It is also not terribly hard to understand. It runs two services. One is an HTTP proxy that uses the SAM API to retrieve information from I2P. The other is a controller for that http proxy which, for now, only has one function that re-starts it entirely. Doing this closes your SAM connection and your existing tunnels, guaranteeing that you browse new sites with a fresh identity. The reset function on UNIX-Like operating systems can optionally re-set an application's configuration back to the state it was in when the proxy was started.
This is useful because I2P tunnel identities can be tracked across eepSites during contemporary visits, and when combined with a long-term identifier like a user account, can become "Retroactively Linkable." This enables an easy-to-use, user-controlled interface for manually creating a new identity before and after logging into an eepSite with a user account. An example application which uses this is i2psetproxy.js a WebExtension which assures I2P Proxy settings and provides a "Reset Identity" button on the Firefox toolbar.