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authorIndrajith K L2022-12-03 17:00:20 +0530
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+# vweb - the V Web Server #
+
+A simple yet powerful web server with built-in routing, parameter handling,
+templating, and other features.
+
+## Alpha level software ##
+
+Some features may not be complete, and there may still be bugs. However, it is
+still a very useful tool. The [gitly](https://gitly.org/) site is based on vweb.
+
+## Features ##
+
+- **Very fast** performance of C on the web.
+- **Small binary** hello world website is <100 KB.
+- **Easy to deploy** just one binary file that also includes all templates.
+ No need to install any dependencies.
+- **Templates are precompiled** all errors are visible at compilation time,
+ not at runtime.
+
+There is no formal documentation yet - here is a simple
+[example](https://github.com/vlang/v/tree/master/examples/vweb/vweb_example.v)
+
+There's also the V forum, [vorum](https://github.com/vlang/vorum)
+
+`vorum.v` contains all GET and POST actions.
+
+```v ignore
+pub fn (app mut App) index() {
+ posts := app.find_all_posts()
+ $vweb.html()
+}
+
+// TODO ['/post/:id/:title']
+// TODO `fn (app App) post(id int)`
+pub fn (app App) post() {
+ id := app.get_post_id()
+ post := app.retrieve_post(id) or {
+ app.redirect('/')
+ return
+ }
+ comments := app.find_comments(id)
+ show_form := true
+ $vweb.html()
+}
+```
+
+`index.html` is an example of the V template language:
+
+```html
+@for post in posts
+ <div class=post>
+ <a class=topic href="@post.url">@post.title</a>
+ <img class=comment-img>
+ <span class=nr-comments>@post.nr_comments</span>
+ <span class=time>@post.time</span>
+ </div>
+@end
+```
+
+`$vweb.html()` compiles an HTML template into V during compilation,
+and embeds the resulting code into the current action.
+
+That means that the template automatically has access to that action's entire environment.
+
+## Deploying vweb apps ##
+
+Everything, including HTML templates, is in one binary file. That's all you need to deploy.
+
+## Getting Started ##
+
+To start with vweb, you have to import the module `vweb`. After the import,
+define a struct to hold vweb.Context (and any other variables your program will
+need).
+
+The web server can be started by calling `vweb.run(&App{}, port)`.
+
+**Example:**
+
+```v ignore
+import vweb
+
+struct App {
+ vweb.Context
+}
+
+fn main() {
+ vweb.run(&App{}, 8080)
+}
+```
+
+### Defining endpoints ###
+
+To add endpoints to your web server, you have to extend the `App` struct.
+For routing you can either use auto-mapping of function names or specify the path as an attribute.
+The function expects a response of the type `vweb.Result`.
+
+**Example:**
+
+```v ignore
+// This endpoint can be accessed via http://localhost:port/hello
+fn (mut app App) hello() vweb.Result {
+ return app.text('Hello')
+}
+
+// This endpoint can be accessed via http://localhost:port/foo
+["/foo"]
+fn (mut app App) world() vweb.Result {
+ return app.text('World')
+}
+```
+
+To create an HTTP POST endpoint, you simply add a `[post]` attribute before the function definition.
+
+**Example:**
+
+```v ignore
+[post]
+fn (mut app App) world() vweb.Result {
+ return app.text('World')
+}
+```
+
+To pass a parameter to an endpoint, you simply define it inside
+an attribute, e. g. `['/hello/:user]`.
+After it is defined in the attribute, you have to add it as a function parameter.
+
+**Example:**
+
+```v ignore
+['/hello/:user']
+fn (mut app App) hello_user(user string) vweb.Result {
+ return app.text('Hello $user')
+}
+```
+
+You have access to the raw request data such as headers
+or the request body by accessing `app` (which is `vweb.Context`).
+If you want to read the request body, you can do that by calling `app.req.data`.
+To read the request headers, you just call `app.req.header` and access the
+header you want, e.g. `app.req.header.get(.content_type)`. See `struct Header`
+for all available methods (`v doc net.http Header`).