Nice way to call "handle_file_request" from user code

[paulharris]

Hi, this was partially addressed in #235 ,
I think it would be nice if we could write code along the lines of:

srv.Get("/favicon.ico", [=](const httplib::Request &, httplib::Response &res) {
    srv.send_file( location_of_favicon, res );
}

or something similar.
The point is Server::handle_file_request calls find_content_type() and does the neat mmap async method now, it would be nice to simply be able to ask httplib to send a specific file when desired.

favicon.ico is a simplistic example, but there are other cases where you compute a filename and want to send that.

[yhirose]

@paulharris thanks for the idea. There is no need for it in any my projects for now. But a pull request is always welcome!

[sonavalepratham]

@paulharris I am beginner in open source & would like to work on this. can you please explain me what needs to be done here?

[yhirose]

@paulharris I implemented it. (https://github.com/yhirose/cpp-httplib?tab=readme-ov-file#send-file-content)

svr.Get("/content", [&](const Request &req, Response &res) {
  res.set_file_content("./path/to/conent.html");
});

svr.Get("/content", [&](const Request &req, Response &res) {
  res.set_file_content("./path/to/conent", "text/html");
});

[paulharris]

Thanks @yhirose !
See #1927 for what I had implemented last week and was about to push when I saw these messages.

I find res.set_file_content() good, but a bit low level.
I was hoping for something half way between the mountpoint approach and this raw approach.
The problem with mountpoint is it will respond first, before any other GET handler,
and you don't get a chance to tweak the response if you need to (which I don't).