Remove old bash script for setting up a new project, do everything in
Zig to make it platform agnostic and give us an easy place to add
scaffolding commands in future.
Andrew overhauled std.http to avoid allocations and put control of
connection + stream into hands of users. For now, do a barebones
implementation to restore compatibility, later we can do keepalive and
pipelining. For now, still getting decent enough performance the "slow"
way.
Relevant commit: 6395ba852a
Commit message copied here for posterity:
> Author: Andrew Kelley <andrew@ziglang.org>
> Date: Tue Feb 20 03:30:51 2024 -0700
> std.http.Server: rework the API entirely
> Mainly, this removes the poorly named `wait`, `send`, `finish`
> functions, which all operated on the same "Response" object, which was
> actually being used as the request.
>
> Now, it looks like this:
> 1. std.net.Server.accept() gives you a std.net.Server.Connection
> 2. std.http.Server.init() with the connection
> 3. Server.receiveHead() gives you a Request
> 4. Request.reader() gives you a body reader
> 5. Request.respond() is a one-shot, or Request.respondStreaming() creates
> a Response
> 6. Response.writer() gives you a body writer
> 7. Response.end() finishes the response; Response.endChunked() allows
> passing response trailers.
>
> In other words, the type system now guides the API user down the correct
> path.
>
> receiveHead allows extra bytes to be read into the read buffer, and then
> will reuse those bytes for the body or the next request upon connection
> reuse.
>
> respond(), the one-shot function, will send the entire response in one
> syscall.
>
> Streaming response bodies no longer wastefully wraps every call to write
> with a chunk header and trailer; instead it only sends the HTTP chunk
> wrapper when flushing. This means the user can still control when it
> happens but it also does not add unnecessary chunks.
>
> Empirically, in my example project that uses this API, the usage code is
> significantly less noisy, it has less error handling while handling
> errors more correctly, it's more obvious what is happening, and it is
> syscall-optimal.
>
> Additionally:
> * Uncouple std.http.HeadParser from protocol.zig
> * Delete std.Server.Connection; use std.net.Server.Connection instead.
> - The API user supplies the read buffer when initializing the
> http.Server, and it is used for the HTTP head as well as a buffer
> for reading the body into.
> * Replace and document the State enum. No longer is there both "start"
> and "first".
Create `jetzig.http.Response` when `std.http.Server.Response` is created
and delegate all management of `std.http.Server.Response` to
`jetzig.http.Response`. Using this internally means we use the same
internal interface for the `Response` as the user, which gives us things
like response headers management in views for free (user simply calls
`request.response.headers.append()` etc.).
Implement `jetzig.http.Request.params()` which parses either a JSON
request body or a query param string into a `jetzig.data.Value`.
Allow configuring params for static site generation - configure an array
of params for each endpoint which is then parsed at build time and a
separate JSON and HTML output is generated for each by invoking the
relevant view function and passing in resource ID/params. Params are
stored in generated `routes.zig` for route matching at run time.
Remove `anyerror` from example definitions - we only need this in the
struct definition, no need to have explicit error set defined in
user-defined view functions.
Generate views defined with `request: *jetzig.http.StaticRequest` as
static content into `static/` directory so that exported JSON and HTML
can be rendered direct from disk, skipping runtime rendering.
