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examples: migrate vweb examples to veb
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16 changed files with 64 additions and 117 deletions
44
examples/veb/file_transform/file_transform.v
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44
examples/veb/file_transform/file_transform.v
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@ -0,0 +1,44 @@
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module main
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import veb
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const port = 8082
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pub struct Context {
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veb.Context
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}
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pub struct App {
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}
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fn main() {
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mut app := &App{}
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veb.run[App, Context](mut app, 8080)
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}
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pub fn (mut app App) index() veb.Result {
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return $veb.html()
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}
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@['/upload'; post]
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pub fn (mut app App) upload(mut ctx Context) veb.Result {
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fdata := ctx.files['upfile']
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data_rows := fdata[0].data.split('\n')
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mut output_data := ''
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for elem in data_rows {
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delim_row := elem.split('\t')
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output_data += '${delim_row[0]}\t${delim_row[1]}\t${delim_row[0].int() + delim_row[1].int()}\n'
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}
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output_data = output_data.all_before_last('\n')
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println(output_data)
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ctx.set_header(.content_disposition, 'attachment; filename=results.txt')
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ctx.send_response_to_client('application/octet-stream', output_data)
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return $veb.html()
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}
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@ -1,6 +1,6 @@
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# Host a static website
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Here is an example on how to use the vweb server's static capabilities,
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Here is an example on how to use the Veb server's static capabilities,
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to host a static website from the `dist/` folder. Just run the server,
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it will be available at http://localhost:8080/ :
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Before Width: | Height: | Size: 1.9 KiB After Width: | Height: | Size: 1.9 KiB |
Before Width: | Height: | Size: 15 KiB After Width: | Height: | Size: 15 KiB |
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module main
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import os
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import vweb
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import veb
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// import vweb.assets
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import time
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const port = 8081
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struct App {
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vweb.Context
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pub struct Context {
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veb.Context
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}
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pub struct App {
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veb.StaticHandler
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}
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fn main() {
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mut app := &App{}
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app.serve_static('/favicon.ico', 'favicon.ico')
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app.serve_static('/favicon.ico', 'favicon.ico')!
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// Automatically make available known static mime types found in given directory.
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os.chdir(os.dir(os.executable()))!
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app.handle_static('assets', true)
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vweb.run(app, port)
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app.handle_static('assets', true)!
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veb.run[App, Context](mut app, 8080)
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}
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pub fn (mut app App) index() vweb.Result {
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pub fn (mut app App) index() veb.Result {
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// We can dynamically specify which assets are to be used in template.
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// mut am := assets.new_manager()
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// am.add_css('assets/index.css')
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// css := am.include_css(false)
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title := 'VWeb Assets Example'
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subtitle := 'VWeb can serve static assets too!'
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title := 'Veb Assets Example'
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subtitle := 'Veb can serve static assets too!'
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message := 'It also has an Assets Manager that allows dynamically specifying which CSS and JS files to be used.'
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return $vweb.html()
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return $veb.html()
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}
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fn (mut app App) text() vweb.Result {
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return app.Context.text('Hello, world from vweb!')
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fn (mut app App) text() veb.Result {
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return ctx.text('Hello, world from veb!')
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}
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fn (mut app App) time() vweb.Result {
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return app.Context.text(time.now().format())
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fn (mut app App) time() veb.Result {
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return ctx.text(time.now().format())
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}
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@ -1,62 +0,0 @@
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import time
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import vweb
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// See https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS
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// and https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#preflighted_requests
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// > Cross-Origin Resource Sharing (CORS) is an HTTP-header based mechanism that allows
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// > a server to indicate any origins (domain, scheme, or port) other than its own from
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// > which a browser should permit loading resources...
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// Usage: do `./v run examples/vweb/cors/` to start the app,
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// then check the headers in another shell:
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//
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// 1) `curl -vvv -X OPTIONS http://localhost:45678/time`
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// 2) `curl -vvv -X POST http://localhost:45678/
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struct App {
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vweb.Context
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}
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// Browsers like Chrome use OPTIONS requests for their preflight requests.
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// This route method ensures, that they will get the headers they need, to allow CORS.
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@['/:path...'; options]
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pub fn (mut app App) preflight(path string) vweb.Result {
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app.add_header('Access-Control-Allow-Methods', 'GET,HEAD,PUT,PATCH,POST,DELETE')
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app.add_header('Vary', 'Access-Control-Request-Headers')
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return app.text('ok')
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}
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// before_request will be called for each route. *Either* use the add_header here, to allow
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// *all* endpoints, or add it for each specific route, including for the preflight one above.
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// Note that browsers disallow using the Access-Control-Allow-Origin header more than once.
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pub fn (mut app App) before_request() {
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app.add_header('Access-Control-Allow-Origin', '*')
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}
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// time is a simple POST request handler, that returns the current time. It should be available
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// to JS scripts, running on arbitrary other origins/domains.
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@[post]
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pub fn (mut app App) time() vweb.Result {
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// *Either* use the .add_header line here, *or* the one in before_request, but *not both*.
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// app.add_header('Access-Control-Allow-Origin', '*')
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return app.json({
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'time': time.now().format_ss_milli()
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})
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}
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fn main() {
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println("
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To test, if CORS works, copy this JS snippet, then go to for example https://stackoverflow.com/ ,
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press F12, then paste the snippet in the opened JS console. You should see the vweb server's time:
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var xhr = new XMLHttpRequest();
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xhr.onload = function(data) {
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console.log('xhr loaded');
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console.log(xhr.response);
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};
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xhr.open('POST', 'http://localhost:45678/time');
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xhr.send();
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")
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vweb.run(&App{}, 45678)
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}
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@ -1,40 +0,0 @@
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module main
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import vweb
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const port = 8082
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struct App {
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vweb.Context
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}
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fn main() {
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vweb.run(&App{}, port)
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}
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pub fn (mut app App) index() vweb.Result {
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return $vweb.html()
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}
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@['/upload'; post]
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pub fn (mut app App) upload() vweb.Result {
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fdata := app.files['upfile']
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data_rows := fdata[0].data.split('\n')
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mut output_data := ''
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for elem in data_rows {
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delim_row := elem.split('\t')
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output_data += '${delim_row[0]}\t${delim_row[1]}\t${delim_row[0].int() + delim_row[1].int()}\n'
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}
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output_data = output_data.all_before_last('\n')
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println(output_data)
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app.add_header('Content-Disposition', 'attachment; filename=results.txt')
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app.send_response_to_client('application/octet-stream', output_data)
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return $vweb.html()
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}
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@ -1,6 +1,7 @@
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// Copyright (c) 2019-2024 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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//@[deprecated: '`vweb` is deprecated `veb`. Please use `veb` instead.']
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module vweb
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import os
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