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vieter
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Started logging stuff; added vweb source code

main
Jef Roosens 2022-01-09 17:44:47 +01:00
parent 12aff4ff9f
commit 1967f395f1
Signed by: Jef Roosens
GPG Key ID: 955C0660072F691F
13 changed files with 2196 additions and 10 deletions
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2
.gitignore vendored
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@ -4,3 +4,5 @@ vieter/vieter
# Ignore testing files
*.pkg*
vieter.log

2
Makefile
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@ -1,6 +1,6 @@
.PHONY: run
run:
API_KEY=test REPO_DIR=data v watch run vieter
API_KEY=test REPO_DIR=data LOG_LEVEL=DEBUG v watch run vieter
.PHONY: fmt
fmt:

54
vieter/main.v
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@ -2,13 +2,15 @@ module main
import vweb
import os
import log
const port = 8000
struct App {
vweb.Context
api_key string [required]
repo_dir string [required]
api_key string [required; vweb_global]
repo_dir string [required; vweb_global]
logger log.Log [required; vweb_global]
}
[noreturn]
@ -17,21 +19,54 @@ fn exit_with_message(code int, msg string) {
exit(code)
}
[put; '/pkgs/:filename']
[post; '/publish']
fn (mut app App) put_package(filename string) vweb.Result {
os.write_file('$app.repo_dir/$filename', app.req.data) or {
return app.text(err.msg)
for _, files in app.files {
for file in files {
filepath := os.join_path_single(app.repo_dir, file.filename)
if os.exists(filepath) {
return app.text('File already exists.')
}
os.write_file(filepath, file.data) or {
return app.text('Failed to upload file.')
}
return app.text('yeet')
}
}
return app.text('yeet')
return app.text('done')
}
fn main() {
// Configure logger
log_level_str := os.getenv_opt('LOG_LEVEL') or { 'WARN' }
log_level := log.level_from_tag(log_level_str) or {
exit_with_message(1, 'Invalid log level. The allowed values are FATAL, ERROR, WARN, INFO & DEBUG.') }
log_file := os.getenv_opt('LOG_FILE') or { 'vieter.log' }
mut logger := log.Log{
level: log_level
}
logger.set_full_logpath(log_file)
logger.log_to_console_too()
defer {
logger.info('Flushing log file')
logger.flush()
logger.close()
}
// logger.set
logger.info('Logger set up.')
logger.flush()
// Configure vweb server
key := os.getenv_opt('API_KEY') or { exit_with_message(1, 'No API key was provided.') }
repo_dir := os.getenv_opt('REPO_DIR') or {
exit_with_message(1, 'No repo directory was configured.')
}
println(repo_dir)
// We create the upload directory during startup
if !os.is_dir(repo_dir) {
@ -41,7 +76,8 @@ fn main() {
}
vweb.run(&App{
api_key: key
repo_dir: repo_dir
api_key: key,
repo_dir: repo_dir,
logger: logger
}, port)
}

141
vieter/vweb/README.md 100644
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@ -0,0 +1,141 @@
# 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`).

201
vieter/vweb/assets/assets.v 100644
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@ -0,0 +1,201 @@
module assets
// this module provides an AssetManager for combining
// and caching javascript & css.
import os
import time
import crypto.md5
const (
unknown_asset_type_error = 'vweb.assets: unknown asset type'
)
struct AssetManager {
mut:
css []Asset
js []Asset
pub mut:
// when true assets will be minified
minify bool
// the directory to store the cached/combined files
cache_dir string
}
struct Asset {
file_path string
last_modified time.Time
}
// new_manager returns a new AssetManager
pub fn new_manager() &AssetManager {
return &AssetManager{}
}
// add_css adds a css asset
pub fn (mut am AssetManager) add_css(file string) bool {
return am.add('css', file)
}
// add_js adds a js asset
pub fn (mut am AssetManager) add_js(file string) bool {
return am.add('js', file)
}
// combine_css returns the combined css as a string when to_file is false
// when to_file is true it combines the css to disk and returns the path of the file
pub fn (am AssetManager) combine_css(to_file bool) string {
return am.combine('css', to_file)
}
// combine_js returns the combined js as a string when to_file is false
// when to_file is true it combines the css to disk and returns the path of the file
pub fn (am AssetManager) combine_js(to_file bool) string {
return am.combine('js', to_file)
}
// include_css returns the html <link> tag(s) for including the css files in a page.
// when combine is true the files are combined.
pub fn (am AssetManager) include_css(combine bool) string {
return am.include('css', combine)
}
// include_js returns the html <script> tag(s) for including the js files in a page.
// when combine is true the files are combined.
pub fn (am AssetManager) include_js(combine bool) string {
return am.include('js', combine)
}
fn (am AssetManager) combine(asset_type string, to_file bool) string {
if am.cache_dir == '' {
panic('vweb.assets: you must set a cache dir.')
}
cache_key := am.get_cache_key(asset_type)
out_file := '$am.cache_dir/${cache_key}.$asset_type'
mut out := ''
// use cache
if os.exists(out_file) {
if to_file {
return out_file
}
cached := os.read_file(out_file) or { return '' }
return cached
}
// rebuild
for asset in am.get_assets(asset_type) {
data := os.read_file(asset.file_path) or { return '' }
out += data
}
if am.minify {
if asset_type == 'css' {
out = minify_css(out)
} else {
out = minify_js(out)
}
}
if !to_file {
return out
}
if !os.is_dir(am.cache_dir) {
os.mkdir(am.cache_dir) or { panic(err) }
}
mut file := os.create(out_file) or { panic(err) }
file.write(out.bytes()) or { panic(err) }
file.close()
return out_file
}
fn (am AssetManager) get_cache_key(asset_type string) string {
mut files_salt := ''
mut latest_modified := i64(0)
for asset in am.get_assets(asset_type) {
files_salt += asset.file_path
if asset.last_modified.unix > latest_modified {
latest_modified = asset.last_modified.unix
}
}
hash := md5.sum(files_salt.bytes()).hex()
return '$hash-$latest_modified'
}
fn (am AssetManager) include(asset_type string, combine bool) string {
assets := am.get_assets(asset_type)
mut out := ''
if asset_type == 'css' {
if combine {
file := am.combine(asset_type, true)
return '<link rel="stylesheet" href="$file">\n'
}
for asset in assets {
out += '<link rel="stylesheet" href="$asset.file_path">\n'
}
}
if asset_type == 'js' {
if combine {
file := am.combine(asset_type, true)
return '<script type="text/javascript" src="$file"></script>\n'
}
for asset in assets {
out += '<script type="text/javascript" src="$asset.file_path"></script>\n'
}
}
return out
}
// dont return option until size limit is removed
// fn (mut am AssetManager) add(asset_type, file string) ?bool {
fn (mut am AssetManager) add(asset_type string, file string) bool {
if !os.exists(file) {
// return error('vweb.assets: cannot add asset $file, it does not exist')
return false
}
asset := Asset{
file_path: file
last_modified: time.Time{
unix: os.file_last_mod_unix(file)
}
}
if asset_type == 'css' {
am.css << asset
} else if asset_type == 'js' {
am.js << asset
} else {
panic('$assets.unknown_asset_type_error ($asset_type).')
}
return true
}
fn (am AssetManager) exists(asset_type string, file string) bool {
assets := am.get_assets(asset_type)
for asset in assets {
if asset.file_path == file {
return true
}
}
return false
}
fn (am AssetManager) get_assets(asset_type string) []Asset {
if asset_type != 'css' && asset_type != 'js' {
panic('$assets.unknown_asset_type_error ($asset_type).')
}
assets := if asset_type == 'css' { am.css } else { am.js }
return assets
}
// todo: implement proper minification
pub fn minify_css(css string) string {
mut lines := css.split('\n')
for i, _ in lines {
lines[i] = lines[i].trim_space()
}
return lines.join(' ')
}
// todo: implement proper minification
pub fn minify_js(js string) string {
mut lines := js.split('\n')
for i, _ in lines {
lines[i] = lines[i].trim_space()
}
return lines.join(' ')
}

179
vieter/vweb/assets/assets_test.v 100644
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@ -0,0 +1,179 @@
import vweb.assets
import os
// clean_cache_dir used before and after tests that write to a cache directory.
// Because of parallel compilation and therefore test running,
// unique cache dirs are needed per test function.
fn clean_cache_dir(dir string) {
if os.is_dir(dir) {
os.rmdir_all(dir) or { panic(err) }
}
}
fn base_cache_dir() string {
return os.join_path(os.temp_dir(), 'assets_test_cache')
}
fn cache_dir(test_name string) string {
return os.join_path(base_cache_dir(), test_name)
}
fn get_test_file_path(file string) string {
path := os.join_path(base_cache_dir(), file)
if !os.is_dir(base_cache_dir()) {
os.mkdir_all(base_cache_dir()) or { panic(err) }
}
if !os.exists(path) {
os.write_file(path, get_test_file_contents(file)) or { panic(err) }
}
return path
}
fn get_test_file_contents(file string) string {
contents := match file {
'test1.js' { '{"one": 1}\n' }
'test2.js' { '{"two": 2}\n' }
'test1.css' { '.one {\n\tcolor: #336699;\n}\n' }
'test2.css' { '.two {\n\tcolor: #996633;\n}\n' }
else { 'wibble\n' }
}
return contents
}
fn test_set_cache() {
mut am := assets.new_manager()
am.cache_dir = 'cache'
}
fn test_set_minify() {
mut am := assets.new_manager()
am.minify = true
}
fn test_add() {
mut am := assets.new_manager()
assert am.add('css', 'testx.css') == false
assert am.add('css', get_test_file_path('test1.css')) == true
assert am.add('js', get_test_file_path('test1.js')) == true
// assert am.add('css', get_test_file_path('test2.js')) == false // TODO: test extension on add
}
fn test_add_css() {
mut am := assets.new_manager()
assert am.add_css('testx.css') == false
assert am.add_css(get_test_file_path('test1.css')) == true
// assert am.add_css(get_test_file_path('test1.js')) == false // TODO: test extension on add
}
fn test_add_js() {
mut am := assets.new_manager()
assert am.add_js('testx.js') == false
assert am.add_css(get_test_file_path('test1.js')) == true
// assert am.add_css(get_test_file_path('test1.css')) == false // TODO: test extension on add
}
fn test_combine_css() {
mut am := assets.new_manager()
am.cache_dir = cache_dir('test_combine_css')
clean_cache_dir(am.cache_dir)
am.add_css(get_test_file_path('test1.css'))
am.add_css(get_test_file_path('test2.css'))
// TODO: How do I test non-minified, is there a "here doc" format that keeps formatting?
am.minify = true
expected := '.one { color: #336699; } .two { color: #996633; } '
actual := am.combine_css(false)
assert actual == expected
assert actual.contains(expected)
// Test cache path doesn't change when input files and minify setting do not.
path1 := am.combine_css(true)
clean_cache_dir(am.cache_dir)
path2 := am.combine_css(true)
assert path1 == path2
clean_cache_dir(am.cache_dir)
}
fn test_combine_js() {
mut am := assets.new_manager()
am.cache_dir = cache_dir('test_combine_js')
clean_cache_dir(am.cache_dir)
am.add_js(get_test_file_path('test1.js'))
am.add_js(get_test_file_path('test2.js'))
expected1 := '{"one": 1}'
expected2 := '{"two": 2}'
expected := expected1 + '\n' + expected2 + '\n'
actual := am.combine_js(false)
assert actual == expected
assert actual.contains(expected)
assert actual.contains(expected1)
assert actual.contains(expected2)
am.minify = true
clean_cache_dir(am.cache_dir)
expected3 := expected1 + ' ' + expected2 + ' '
actual2 := am.combine_js(false)
assert actual2 == expected3
assert actual2.contains(expected3)
// Test cache path doesn't change when input files and minify setting do not.
path1 := am.combine_js(true)
clean_cache_dir(am.cache_dir)
path2 := am.combine_js(true)
assert path1 == path2
clean_cache_dir(am.cache_dir)
}
fn test_include_css() {
mut am := assets.new_manager()
file1 := get_test_file_path('test1.css')
am.add_css(file1)
expected := '<link rel="stylesheet" href="$file1">\n'
actual := am.include_css(false)
assert actual == expected
assert actual.contains(expected)
// Two lines of output.
file2 := get_test_file_path('test2.css')
am.add_css(file2)
am.cache_dir = cache_dir('test_include_css')
clean_cache_dir(am.cache_dir)
expected2 := expected + '<link rel="stylesheet" href="$file2">\n'
actual2 := am.include_css(false)
assert actual2 == expected2
assert actual2.contains(expected2)
// Combined output.
clean_cache_dir(am.cache_dir)
actual3 := am.include_css(true)
assert actual3.contains(expected2) == false
assert actual3.starts_with('<link rel="stylesheet" href="$am.cache_dir/') == true
// Test cache path doesn't change when input files and minify setting do not.
clean_cache_dir(am.cache_dir)
actual4 := am.include_css(true)
assert actual4 == actual3
clean_cache_dir(am.cache_dir)
}
fn test_include_js() {
mut am := assets.new_manager()
file1 := get_test_file_path('test1.js')
am.add_js(file1)
expected := '<script type="text/javascript" src="$file1"></script>\n'
actual := am.include_js(false)
assert actual == expected
assert actual.contains(expected)
// Two lines of output.
file2 := get_test_file_path('test2.js')
am.add_js(file2)
am.cache_dir = cache_dir('test_include_js')
clean_cache_dir(am.cache_dir)
expected2 := expected + '<script type="text/javascript" src="$file2"></script>\n'
actual2 := am.include_js(false)
assert actual2 == expected2
assert actual2.contains(expected2)
// Combined output.
clean_cache_dir(am.cache_dir)
actual3 := am.include_js(true)
assert actual3.contains(expected2) == false
assert actual3.starts_with('<script type="text/javascript" src="$am.cache_dir/')
// Test cache path doesn't change when input files and minify setting do not.
clean_cache_dir(am.cache_dir)
actual4 := am.include_js(true)
assert actual4 == actual3
clean_cache_dir(am.cache_dir)
}

74
vieter/vweb/parse.v 100644
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@ -0,0 +1,74 @@
module vweb
import net.urllib
import net.http
// Parsing function attributes for methods and path.
fn parse_attrs(name string, attrs []string) ?([]http.Method, string) {
if attrs.len == 0 {
return [http.Method.get], '/$name'
}
mut x := attrs.clone()
mut methods := []http.Method{}
mut path := ''
for i := 0; i < x.len; {
attr := x[i]
attru := attr.to_upper()
m := http.method_from_str(attru)
if attru == 'GET' || m != .get {
methods << m
x.delete(i)
continue
}
if attr.starts_with('/') {
if path != '' {
return IError(http.MultiplePathAttributesError{})
}
path = attr
x.delete(i)
continue
}
i++
}
if x.len > 0 {
return IError(http.UnexpectedExtraAttributeError{
msg: 'Encountered unexpected extra attributes: $x'
})
}
if methods.len == 0 {
methods = [http.Method.get]
}
if path == '' {
path = '/$name'
}
// Make path lowercase for case-insensitive comparisons
return methods, path.to_lower()
}
fn parse_query_from_url(url urllib.URL) map[string]string {
mut query := map[string]string{}
for k, v in url.query().data {
query[k] = v.data[0]
}
return query
}
fn parse_form_from_request(request http.Request) ?(map[string]string, map[string][]http.FileData) {
mut form := map[string]string{}
mut files := map[string][]http.FileData{}
if request.method in methods_with_form {
ct := request.header.get(.content_type) or { '' }.split(';').map(it.trim_left(' \t'))
if 'multipart/form-data' in ct {
boundary := ct.filter(it.starts_with('boundary='))
if boundary.len != 1 {
return error('detected more that one form-data boundary')
}
form, files = http.parse_multipart_form(request.data, boundary[0][9..])
} else {
form = http.parse_form(request.data)
}
}
return form, files
}

282
vieter/vweb/route_test.v 100644
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@ -0,0 +1,282 @@
module vweb
struct RoutePair {
url string
route string
}
fn (rp RoutePair) test() ?[]string {
url := rp.url.split('/').filter(it != '')
route := rp.route.split('/').filter(it != '')
return route_matches(url, route)
}
fn (rp RoutePair) test_match() {
rp.test() or { panic('should match: $rp') }
}
fn (rp RoutePair) test_no_match() {
rp.test() or { return }
panic('should not match: $rp')
}
fn (rp RoutePair) test_param(expected []string) {
res := rp.test() or { panic('should match: $rp') }
assert res == expected
}
fn test_route_no_match() {
tests := [
RoutePair{
url: '/a'
route: '/a/b/c'
},
RoutePair{
url: '/a/'
route: '/a/b/c'
},
RoutePair{
url: '/a/b'
route: '/a/b/c'
},
RoutePair{
url: '/a/b/'
route: '/a/b/c'
},
RoutePair{
url: '/a/c/b'
route: '/a/b/c'
},
RoutePair{
url: '/a/c/b/'
route: '/a/b/c'
},
RoutePair{
url: '/a/b/c/d'
route: '/a/b/c'
},
RoutePair{
url: '/a/b/c'
route: '/'
},
]
for test in tests {
test.test_no_match()
}
}
fn test_route_exact_match() {
tests := [
RoutePair{
url: '/a/b/c'
route: '/a/b/c'
},
RoutePair{
url: '/a/b/c/'
route: '/a/b/c'
},
RoutePair{
url: '/a'
route: '/a'
},
RoutePair{
url: '/'
route: '/'
},
]
for test in tests {
test.test_match()
}
}
fn test_route_params_match() {
RoutePair{
url: '/a/b/c'
route: '/:a/b/c'
}.test_match()
RoutePair{
url: '/a/b/c'
route: '/a/:b/c'
}.test_match()
RoutePair{
url: '/a/b/c'
route: '/a/b/:c'
}.test_match()
RoutePair{
url: '/a/b/c'
route: '/:a/b/:c'
}.test_match()
RoutePair{
url: '/a/b/c'
route: '/:a/:b/:c'
}.test_match()
RoutePair{
url: '/one/two/three'
route: '/:a/:b/:c'
}.test_match()
RoutePair{
url: '/one/b/c'
route: '/:a/b/c'
}.test_match()
RoutePair{
url: '/one/two/three'
route: '/:a/b/c'
}.test_no_match()
RoutePair{
url: '/one/two/three'
route: '/:a/:b/c'
}.test_no_match()
RoutePair{
url: '/one/two/three'
route: '/:a/b/:c'
}.test_no_match()
RoutePair{
url: '/a/b/c/d'
route: '/:a/:b/:c'
}.test_no_match()
RoutePair{
url: '/1/2/3/4'
route: '/:a/:b/:c'
}.test_no_match()
RoutePair{
url: '/a/b'
route: '/:a/:b/:c'
}.test_no_match()
RoutePair{
url: '/1/2'
route: '/:a/:b/:c'
}.test_no_match()
}
fn test_route_params() {
RoutePair{
url: '/a/b/c'
route: '/:a/b/c'
}.test_param(['a'])
RoutePair{
url: '/one/b/c'
route: '/:a/b/c'
}.test_param(['one'])
RoutePair{
url: '/one/two/c'
route: '/:a/:b/c'
}.test_param(['one', 'two'])
RoutePair{
url: '/one/two/three'
route: '/:a/:b/:c'
}.test_param(['one', 'two', 'three'])
RoutePair{
url: '/one/b/three'
route: '/:a/b/:c'
}.test_param(['one', 'three'])
}
fn test_route_params_array_match() {
// array can only be used on the last word (TODO: add parsing / tests to ensure this)
RoutePair{
url: '/a/b/c'
route: '/a/b/:c...'
}.test_match()
RoutePair{
url: '/a/b/c/d'
route: '/a/b/:c...'
}.test_match()
RoutePair{
url: '/a/b/c/d/e'
route: '/a/b/:c...'
}.test_match()
RoutePair{
url: '/one/b/c/d/e'
route: '/:a/b/:c...'
}.test_match()
RoutePair{
url: '/one/two/c/d/e'
route: '/:a/:b/:c...'
}.test_match()
RoutePair{
url: '/one/two/three/four/five'
route: '/:a/:b/:c...'
}.test_match()
RoutePair{
url: '/a/b'
route: '/:a/:b/:c...'
}.test_no_match()
RoutePair{
url: '/a/b/'
route: '/:a/:b/:c...'
}.test_no_match()
}
fn test_route_params_array() {
RoutePair{
url: '/a/b/c'
route: '/a/b/:c...'
}.test_param(['c'])
RoutePair{
url: '/a/b/c/d'
route: '/a/b/:c...'
}.test_param(['c/d'])
RoutePair{
url: '/a/b/c/d/'
route: '/a/b/:c...'
}.test_param(['c/d'])
RoutePair{
url: '/a/b/c/d/e'
route: '/a/b/:c...'
}.test_param(['c/d/e'])
RoutePair{
url: '/one/b/c/d/e'
route: '/:a/b/:c...'
}.test_param(['one', 'c/d/e'])
RoutePair{
url: '/one/two/c/d/e'
route: '/:a/:b/:c...'
}.test_param(['one', 'two', 'c/d/e'])
RoutePair{
url: '/one/two/three/d/e'
route: '/:a/:b/:c...'
}.test_param(['one', 'two', 'three/d/e'])
}
fn test_route_index_path() {
RoutePair{
url: '/'
route: '/:path...'
}.test_param(['/'])
RoutePair{
url: '/foo/bar'
route: '/:path...'
}.test_param(['/foo/bar'])
}

77
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module sse
import net
import time
import strings
// This module implements the server side of `Server Sent Events`.
// See https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events#event_stream_format
// as well as https://html.spec.whatwg.org/multipage/server-sent-events.html#server-sent-events
// for detailed description of the protocol, and a simple web browser client example.
//
// > Event stream format
// > The event stream is a simple stream of text data which must be encoded using UTF-8.
// > Messages in the event stream are separated by a pair of newline characters.
// > A colon as the first character of a line is in essence a comment, and is ignored.
// > Note: The comment line can be used to prevent connections from timing out;
// > a server can send a comment periodically to keep the connection alive.
// >
// > Each message consists of one or more lines of text listing the fields for that message.
// > Each field is represented by the field name, followed by a colon, followed by the text
// > data for that field's value.
[heap]
pub struct SSEConnection {
pub mut:
headers map[string]string
conn &net.TcpConn
write_timeout time.Duration = 600 * time.second
}
pub struct SSEMessage {
id string
event string
data string
retry int
}
pub fn new_connection(conn &net.TcpConn) &SSEConnection {
return &SSEConnection{
conn: unsafe { conn }
}
}
// sse_start is used to send the start of a Server Side Event response.
pub fn (mut sse SSEConnection) start() ? {
sse.conn.set_write_timeout(sse.write_timeout)
mut start_sb := strings.new_builder(512)
start_sb.write_string('HTTP/1.1 200')
start_sb.write_string('\r\nConnection: keep-alive')
start_sb.write_string('\r\nCache-Control: no-cache')
start_sb.write_string('\r\nContent-Type: text/event-stream')
for k, v in sse.headers {
start_sb.write_string('\r\n$k: $v')
}
start_sb.write_string('\r\n')
sse.conn.write(start_sb) or { return error('could not start sse response') }
}
// send_message sends a single message to the http client that listens for SSE.
// It does not close the connection, so you can use it many times in a loop.
pub fn (mut sse SSEConnection) send_message(message SSEMessage) ? {
mut sb := strings.new_builder(512)
if message.id != '' {
sb.write_string('id: $message.id\n')
}
if message.event != '' {
sb.write_string('event: $message.event\n')
}
if message.data != '' {
sb.write_string('data: $message.data\n')
}
if message.retry != 0 {
sb.write_string('retry: $message.retry\n')
}
sb.write_string('\n')
sse.conn.write(sb) ?
}

300
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import os
import time
import json
import net
import net.http
import io
const (
sport = 12380
exit_after_time = 12000 // milliseconds
vexe = os.getenv('VEXE')
vweb_logfile = os.getenv('VWEB_LOGFILE')
vroot = os.dir(vexe)
serverexe = os.join_path(os.cache_dir(), 'vweb_test_server.exe')
tcp_r_timeout = 30 * time.second
tcp_w_timeout = 30 * time.second
)
// setup of vweb webserver
fn testsuite_begin() {
os.chdir(vroot) or {}
if os.exists(serverexe) {
os.rm(serverexe) or {}
}
}
fn test_a_simple_vweb_app_can_be_compiled() {
// did_server_compile := os.system('$vexe -g -o $serverexe vlib/vweb/tests/vweb_test_server.v')
// TODO: find out why it does not compile with -usecache and -g
did_server_compile := os.system('$vexe -o $serverexe vlib/vweb/tests/vweb_test_server.v')
assert did_server_compile == 0
assert os.exists(serverexe)
}
fn test_a_simple_vweb_app_runs_in_the_background() {
mut suffix := ''
$if !windows {
suffix = ' > /dev/null &'
}
if vweb_logfile != '' {
suffix = ' 2>> $vweb_logfile >> $vweb_logfile &'
}
server_exec_cmd := '$serverexe $sport $exit_after_time $suffix'
$if debug_net_socket_client ? {
eprintln('running:\n$server_exec_cmd')
}
$if windows {
go os.system(server_exec_cmd)
} $else {
res := os.system(server_exec_cmd)
assert res == 0
}
$if macos {
time.sleep(1000 * time.millisecond)
} $else {
time.sleep(100 * time.millisecond)
}
}
// web client tests follow
fn assert_common_headers(received string) {
assert received.starts_with('HTTP/1.1 200 OK\r\n')
assert received.contains('Server: VWeb\r\n')
assert received.contains('Content-Length:')
assert received.contains('Connection: close\r\n')
}
fn test_a_simple_tcp_client_can_connect_to_the_vweb_server() {
received := simple_tcp_client(path: '/') or {
assert err.msg == ''
return
}
assert_common_headers(received)
assert received.contains('Content-Type: text/plain')
assert received.contains('Content-Length: 15')
assert received.ends_with('Welcome to VWeb')
}
fn test_a_simple_tcp_client_simple_route() {
received := simple_tcp_client(path: '/simple') or {
assert err.msg == ''
return
}
assert_common_headers(received)
assert received.contains('Content-Type: text/plain')
assert received.contains('Content-Length: 15')
assert received.ends_with('A simple result')
}
fn test_a_simple_tcp_client_zero_content_length() {
// tests that sending a content-length header of 0 doesn't hang on a read timeout
watch := time.new_stopwatch(auto_start: true)
simple_tcp_client(path: '/', headers: 'Content-Length: 0\r\n\r\n') or {
assert err.msg == ''
return
}
assert watch.elapsed() < 1 * time.second
}
fn test_a_simple_tcp_client_html_page() {
received := simple_tcp_client(path: '/html_page') or {
assert err.msg == ''
return
}
assert_common_headers(received)
assert received.contains('Content-Type: text/html')
assert received.ends_with('<h1>ok</h1>')
}
// net.http client based tests follow:
fn assert_common_http_headers(x http.Response) ? {
assert x.status() == .ok
assert x.header.get(.server) ? == 'VWeb'
assert x.header.get(.content_length) ?.int() > 0
assert x.header.get(.connection) ? == 'close'
}
fn test_http_client_index() ? {
x := http.get('http://127.0.0.1:$sport/') or { panic(err) }
assert_common_http_headers(x) ?
assert x.header.get(.content_type) ? == 'text/plain'
assert x.text == 'Welcome to VWeb'
}
fn test_http_client_404() ? {
url_404_list := [
'http://127.0.0.1:$sport/zxcnbnm',
'http://127.0.0.1:$sport/JHKAJA',
'http://127.0.0.1:$sport/unknown',
]
for url in url_404_list {
res := http.get(url) or { panic(err) }
assert res.status() == .not_found
}
}
fn test_http_client_simple() ? {
x := http.get('http://127.0.0.1:$sport/simple') or { panic(err) }
assert_common_http_headers(x) ?
assert x.header.get(.content_type) ? == 'text/plain'
assert x.text == 'A simple result'
}
fn test_http_client_html_page() ? {
x := http.get('http://127.0.0.1:$sport/html_page') or { panic(err) }
assert_common_http_headers(x) ?
assert x.header.get(.content_type) ? == 'text/html'
assert x.text == '<h1>ok</h1>'
}
fn test_http_client_settings_page() ? {
x := http.get('http://127.0.0.1:$sport/bilbo/settings') or { panic(err) }
assert_common_http_headers(x) ?
assert x.text == 'username: bilbo'
//
y := http.get('http://127.0.0.1:$sport/kent/settings') or { panic(err) }
assert_common_http_headers(y) ?
assert y.text == 'username: kent'
}
fn test_http_client_user_repo_settings_page() ? {
x := http.get('http://127.0.0.1:$sport/bilbo/gostamp/settings') or { panic(err) }
assert_common_http_headers(x) ?
assert x.text == 'username: bilbo | repository: gostamp'
//
y := http.get('http://127.0.0.1:$sport/kent/golang/settings') or { panic(err) }
assert_common_http_headers(y) ?
assert y.text == 'username: kent | repository: golang'
//
z := http.get('http://127.0.0.1:$sport/missing/golang/settings') or { panic(err) }
assert z.status() == .not_found
}
struct User {
name string
age int
}
fn test_http_client_json_post() ? {
ouser := User{
name: 'Bilbo'
age: 123
}
json_for_ouser := json.encode(ouser)
mut x := http.post_json('http://127.0.0.1:$sport/json_echo', json_for_ouser) or { panic(err) }
$if debug_net_socket_client ? {
eprintln('/json_echo endpoint response: $x')
}
assert x.header.get(.content_type) ? == 'application/json'
assert x.text == json_for_ouser
nuser := json.decode(User, x.text) or { User{} }
assert '$ouser' == '$nuser'
//
x = http.post_json('http://127.0.0.1:$sport/json', json_for_ouser) or { panic(err) }
$if debug_net_socket_client ? {
eprintln('/json endpoint response: $x')
}
assert x.header.get(.content_type) ? == 'application/json'
assert x.text == json_for_ouser
nuser2 := json.decode(User, x.text) or { User{} }
assert '$ouser' == '$nuser2'
}
fn test_http_client_multipart_form_data() ? {
boundary := '6844a625b1f0b299'
name := 'foo'
ct := 'multipart/form-data; boundary=$boundary'
contents := 'baz buzz'
data := '--$boundary\r
Content-Disposition: form-data; name="$name"\r
\r
$contents\r
--$boundary--\r
'
mut x := http.fetch(
url: 'http://127.0.0.1:$sport/form_echo'
method: .post
header: http.new_header(
key: .content_type
value: ct
)
data: data
) ?
$if debug_net_socket_client ? {
eprintln('/form_echo endpoint response: $x')
}
assert x.text == contents
}
fn test_http_client_shutdown_does_not_work_without_a_cookie() {
x := http.get('http://127.0.0.1:$sport/shutdown') or {
assert err.msg == ''
return
}
assert x.status() == .not_found
assert x.text == '404 Not Found'
}
fn testsuite_end() {
// This test is guaranteed to be called last.
// It sends a request to the server to shutdown.
x := http.fetch(
url: 'http://127.0.0.1:$sport/shutdown'
method: .get
cookies: {
'skey': 'superman'
}
) or {
assert err.msg == ''
return
}
assert x.status() == .ok
assert x.text == 'good bye'
}
// utility code:
struct SimpleTcpClientConfig {
retries int = 20
host string = 'static.dev'
path string = '/'
agent string = 'v/net.tcp.v'
headers string = '\r\n'
content string
}
fn simple_tcp_client(config SimpleTcpClientConfig) ?string {
mut client := &net.TcpConn(0)
mut tries := 0
for tries < config.retries {
tries++
client = net.dial_tcp('127.0.0.1:$sport') or {
if tries > config.retries {
return err
}
time.sleep(100 * time.millisecond)
continue
}
break
}
client.set_read_timeout(tcp_r_timeout)
client.set_write_timeout(tcp_w_timeout)
defer {
client.close() or {}
}
message := 'GET $config.path HTTP/1.1
Host: $config.host
User-Agent: $config.agent
Accept: */*
$config.headers
$config.content'
$if debug_net_socket_client ? {
eprintln('sending:\n$message')
}
client.write(message.bytes()) ?
read := io.read_all(reader: client) ?
$if debug_net_socket_client ? {
eprintln('received:\n$read')
}
return read.bytestr()
}

118
vieter/vweb/tests/vweb_test_server.v 100644
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module main
import os
import vweb
import time
const (
known_users = ['bilbo', 'kent']
)
struct App {
vweb.Context
port int
timeout int
global_config shared Config
}
struct Config {
max_ping int
}
fn exit_after_timeout(timeout_in_ms int) {
time.sleep(timeout_in_ms * time.millisecond)
// eprintln('webserver is exiting ...')
exit(0)
}
fn main() {
if os.args.len != 3 {
panic('Usage: `vweb_test_server.exe PORT TIMEOUT_IN_MILLISECONDS`')
}
http_port := os.args[1].int()
assert http_port > 0
timeout := os.args[2].int()
assert timeout > 0
go exit_after_timeout(timeout)
//
shared config := &Config{
max_ping: 50
}
app := &App{
port: http_port
timeout: timeout
global_config: config
}
eprintln('>> webserver: started on http://127.0.0.1:$app.port/ , with maximum runtime of $app.timeout milliseconds.')
// vweb.run<App>(mut app, http_port)
vweb.run(app, http_port)
}
// pub fn (mut app App) init_server() {
//}
pub fn (mut app App) index() vweb.Result {
assert app.global_config.max_ping == 50
return app.text('Welcome to VWeb')
}
pub fn (mut app App) simple() vweb.Result {
return app.text('A simple result')
}
pub fn (mut app App) html_page() vweb.Result {
return app.html('<h1>ok</h1>')
}
// the following serve custom routes
['/:user/settings']
pub fn (mut app App) settings(username string) vweb.Result {
if username !in known_users {
return app.not_found()
}
return app.html('username: $username')
}
['/:user/:repo/settings']
pub fn (mut app App) user_repo_settings(username string, repository string) vweb.Result {
if username !in known_users {
return app.not_found()
}
return app.html('username: $username | repository: $repository')
}
['/json_echo'; post]
pub fn (mut app App) json_echo() vweb.Result {
// eprintln('>>>>> received http request at /json_echo is: $app.req')
app.set_content_type(app.req.header.get(.content_type) or { '' })
return app.ok(app.req.data)
}
['/form_echo'; post]
pub fn (mut app App) form_echo() vweb.Result {
app.set_content_type(app.req.header.get(.content_type) or { '' })
return app.ok(app.form['foo'])
}
// Make sure [post] works without the path
[post]
pub fn (mut app App) json() vweb.Result {
// eprintln('>>>>> received http request at /json is: $app.req')
app.set_content_type(app.req.header.get(.content_type) or { '' })
return app.ok(app.req.data)
}
pub fn (mut app App) shutdown() vweb.Result {
session_key := app.get_cookie('skey') or { return app.not_found() }
if session_key != 'superman' {
return app.not_found()
}
go app.gracefull_exit()
return app.ok('good bye')
}
fn (mut app App) gracefull_exit() {
eprintln('>> webserver: gracefull_exit')
time.sleep(100 * time.millisecond)
exit(0)
}

698
vieter/vweb/vweb.v 100644
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// Copyright (c) 2019-2022 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module vweb
import os
import io
import net
import net.http
import net.urllib
import time
import json
// A type which don't get filtered inside templates
pub type RawHtml = string
// A dummy structure that returns from routes to indicate that you actually sent something to a user
[noinit]
pub struct Result {}
pub const (
methods_with_form = [http.Method.post, .put, .patch]
headers_close = http.new_custom_header_from_map({
'Server': 'VWeb'
http.CommonHeader.connection.str(): 'close'
}) or { panic('should never fail') }
http_302 = http.new_response(
status: .found
text: '302 Found'
header: headers_close
)
http_400 = http.new_response(
status: .bad_request
text: '400 Bad Request'
header: http.new_header(
key: .content_type
value: 'text/plain'
).join(headers_close)
)
http_404 = http.new_response(
status: .not_found
text: '404 Not Found'
header: http.new_header(
key: .content_type
value: 'text/plain'
).join(headers_close)
)
http_500 = http.new_response(
status: .internal_server_error
text: '500 Internal Server Error'
header: http.new_header(
key: .content_type
value: 'text/plain'
).join(headers_close)
)
mime_types = {
'.aac': 'audio/aac'
'.abw': 'application/x-abiword'
'.arc': 'application/x-freearc'
'.avi': 'video/x-msvideo'
'.azw': 'application/vnd.amazon.ebook'
'.bin': 'application/octet-stream'
'.bmp': 'image/bmp'
'.bz': 'application/x-bzip'
'.bz2': 'application/x-bzip2'
'.cda': 'application/x-cdf'
'.csh': 'application/x-csh'
'.css': 'text/css'
'.csv': 'text/csv'
'.doc': 'application/msword'
'.docx': 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
'.eot': 'application/vnd.ms-fontobject'
'.epub': 'application/epub+zip'
'.gz': 'application/gzip'
'.gif': 'image/gif'
'.htm': 'text/html'
'.html': 'text/html'
'.ico': 'image/vnd.microsoft.icon'
'.ics': 'text/calendar'
'.jar': 'application/java-archive'
'.jpeg': 'image/jpeg'
'.jpg': 'image/jpeg'
'.js': 'text/javascript'
'.json': 'application/json'
'.jsonld': 'application/ld+json'
'.mid': 'audio/midi audio/x-midi'
'.midi': 'audio/midi audio/x-midi'
'.mjs': 'text/javascript'
'.mp3': 'audio/mpeg'
'.mp4': 'video/mp4'
'.mpeg': 'video/mpeg'
'.mpkg': 'application/vnd.apple.installer+xml'
'.odp': 'application/vnd.oasis.opendocument.presentation'
'.ods': 'application/vnd.oasis.opendocument.spreadsheet'
'.odt': 'application/vnd.oasis.opendocument.text'
'.oga': 'audio/ogg'
'.ogv': 'video/ogg'
'.ogx': 'application/ogg'
'.opus': 'audio/opus'
'.otf': 'font/otf'
'.png': 'image/png'
'.pdf': 'application/pdf'
'.php': 'application/x-httpd-php'
'.ppt': 'application/vnd.ms-powerpoint'
'.pptx': 'application/vnd.openxmlformats-officedocument.presentationml.presentation'
'.rar': 'application/vnd.rar'
'.rtf': 'application/rtf'
'.sh': 'application/x-sh'
'.svg': 'image/svg+xml'
'.swf': 'application/x-shockwave-flash'
'.tar': 'application/x-tar'
'.tif': 'image/tiff'
'.tiff': 'image/tiff'
'.ts': 'video/mp2t'
'.ttf': 'font/ttf'
'.txt': 'text/plain'
'.vsd': 'application/vnd.visio'
'.wav': 'audio/wav'
'.weba': 'audio/webm'
'.webm': 'video/webm'
'.webp': 'image/webp'
'.woff': 'font/woff'
'.woff2': 'font/woff2'
'.xhtml': 'application/xhtml+xml'
'.xls': 'application/vnd.ms-excel'
'.xlsx': 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
'.xml': 'application/xml'
'.xul': 'application/vnd.mozilla.xul+xml'
'.zip': 'application/zip'
'.3gp': 'video/3gpp'
'.3g2': 'video/3gpp2'
'.7z': 'application/x-7z-compressed'
}
max_http_post_size = 1024 * 1024
default_port = 8080
)
// The Context struct represents the Context which hold the HTTP request and response.
// It has fields for the query, form, files.
pub struct Context {
mut:
content_type string = 'text/plain'
status string = '200 OK'
pub:
// HTTP Request
req http.Request
// TODO Response
pub mut:
done bool
// time.ticks() from start of vweb connection handle.
// You can use it to determine how much time is spent on your request.
page_gen_start i64
// TCP connection to client.
// But beware, do not store it for further use, after request processing vweb will close connection.
conn &net.TcpConn
static_files map[string]string
static_mime_types map[string]string
// Map containing query params for the route.
// Example: `http://localhost:3000/index?q=vpm&order_by=desc => { 'q': 'vpm', 'order_by': 'desc' }
query map[string]string
// Multipart-form fields.
form map[string]string
// Files from multipart-form.
files map[string][]http.FileData
header http.Header // response headers
// ? It doesn't seem to be used anywhere
form_error string
}
struct FileData {
pub:
filename string
content_type string
data string
}
struct Route {
methods []http.Method
path string
}
// Defining this method is optional.
// This method called at server start.
// You can use it for initializing globals.
pub fn (ctx Context) init_server() {
eprintln('init_server() has been deprecated, please init your web app in `fn main()`')
}
// Defining this method is optional.
// This method called before every request (aka middleware).
// Probably you can use it for check user session cookie or add header.
pub fn (ctx Context) before_request() {}
pub struct Cookie {
name string
value string
expires time.Time
secure bool
http_only bool
}
// vweb intern function
[manualfree]
pub fn (mut ctx Context) send_response_to_client(mimetype string, res string) bool {
if ctx.done {
return false
}
ctx.done = true
// build header
header := http.new_header_from_map({
http.CommonHeader.content_type: mimetype
http.CommonHeader.content_length: res.len.str()
}).join(ctx.header)
mut resp := http.Response{
header: header.join(vweb.headers_close)
text: res
}
resp.set_version(.v1_1)
resp.set_status(http.status_from_int(ctx.status.int()))
send_string(mut ctx.conn, resp.bytestr()) or { return false }
return true
}
// Response HTTP_OK with s as payload with content-type `text/html`
pub fn (mut ctx Context) html(s string) Result {
ctx.send_response_to_client('text/html', s)
return Result{}
}
// Response HTTP_OK with s as payload with content-type `text/plain`
pub fn (mut ctx Context) text(s string) Result {
ctx.send_response_to_client('text/plain', s)
return Result{}
}
// Response HTTP_OK with json_s as payload with content-type `application/json`
pub fn (mut ctx Context) json<T>(j T) Result {
json_s := json.encode(j)
ctx.send_response_to_client('application/json', json_s)
return Result{}
}
// Response HTTP_OK with a pretty-printed JSON result
pub fn (mut ctx Context) json_pretty<T>(j T) Result {
json_s := json.encode_pretty(j)
ctx.send_response_to_client('application/json', json_s)
return Result{}
}
// Response HTTP_OK with file as payload
pub fn (mut ctx Context) file(f_path string) Result {
ext := os.file_ext(f_path)
data := os.read_file(f_path) or {
eprint(err.msg)
ctx.server_error(500)
return Result{}
}
content_type := vweb.mime_types[ext]
if content_type == '' {
eprintln('no MIME type found for extension $ext')
ctx.server_error(500)
} else {
ctx.send_response_to_client(content_type, data)
}
return Result{}
}
// Response HTTP_OK with s as payload
pub fn (mut ctx Context) ok(s string) Result {
ctx.send_response_to_client(ctx.content_type, s)
return Result{}
}
// Response a server error
pub fn (mut ctx Context) server_error(ecode int) Result {
$if debug {
eprintln('> ctx.server_error ecode: $ecode')
}
if ctx.done {
return Result{}
}
send_string(mut ctx.conn, vweb.http_500.bytestr()) or {}
return Result{}
}
// Redirect to an url
pub fn (mut ctx Context) redirect(url string) Result {
if ctx.done {
return Result{}
}
ctx.done = true
mut resp := vweb.http_302
resp.header = resp.header.join(ctx.header)
resp.header.add(.location, url)
send_string(mut ctx.conn, resp.bytestr()) or { return Result{} }
return Result{}
}
// Send an not_found response
pub fn (mut ctx Context) not_found() Result {
if ctx.done {
return Result{}
}
ctx.done = true
send_string(mut ctx.conn, vweb.http_404.bytestr()) or {}
return Result{}
}
// Sets a cookie
pub fn (mut ctx Context) set_cookie(cookie Cookie) {
mut cookie_data := []string{}
mut secure := if cookie.secure { 'Secure;' } else { '' }
secure += if cookie.http_only { ' HttpOnly' } else { ' ' }
cookie_data << secure
if cookie.expires.unix > 0 {
cookie_data << 'expires=$cookie.expires.utc_string()'
}
data := cookie_data.join(' ')
ctx.add_header('Set-Cookie', '$cookie.name=$cookie.value; $data')
}
// Sets the response content type
pub fn (mut ctx Context) set_content_type(typ string) {
ctx.content_type = typ
}
// Sets a cookie with a `expire_data`
pub fn (mut ctx Context) set_cookie_with_expire_date(key string, val string, expire_date time.Time) {
ctx.add_header('Set-Cookie', '$key=$val; Secure; HttpOnly; expires=$expire_date.utc_string()')
}
// Gets a cookie by a key
pub fn (ctx &Context) get_cookie(key string) ?string { // TODO refactor
mut cookie_header := ctx.get_header('cookie')
if cookie_header == '' {
cookie_header = ctx.get_header('Cookie')
}
cookie_header = ' ' + cookie_header
// println('cookie_header="$cookie_header"')
// println(ctx.req.header)
cookie := if cookie_header.contains(';') {
cookie_header.find_between(' $key=', ';')
} else {
cookie_header.find_between(' $key=', '\r')
}
if cookie != '' {
return cookie.trim_space()
}
return error('Cookie not found')
}
// Sets the response status
pub fn (mut ctx Context) set_status(code int, desc string) {
if code < 100 || code > 599 {
ctx.status = '500 Internal Server Error'
} else {
ctx.status = '$code $desc'
}
}
// Adds an header to the response with key and val
pub fn (mut ctx Context) add_header(key string, val string) {
ctx.header.add_custom(key, val) or {}
}
// Returns the header data from the key
pub fn (ctx &Context) get_header(key string) string {
return ctx.req.header.get_custom(key) or { '' }
}
interface DbInterface {
db voidptr
}
// run_app
[manualfree]
pub fn run<T>(global_app &T, port int) {
println("sup neef")
mut l := net.listen_tcp(.ip6, ':$port') or { panic('failed to listen $err.code $err') }
// Parsing methods attributes
mut routes := map[string]Route{}
$for method in T.methods {
http_methods, route_path := parse_attrs(method.name, method.attrs) or {
eprintln('error parsing method attributes: $err')
return
}
routes[method.name] = Route{
methods: http_methods
path: route_path
}
}
println('[Vweb] Running app on http://localhost:$port')
for {
// Create a new app object for each connection, copy global data like db connections
mut request_app := &T{}
$if T is DbInterface {
request_app.db = global_app.db
} $else {
// println('vweb no db')
}
$for field in T.fields {
if 'vweb_global' in field.attrs || field.is_shared {
request_app.$(field.name) = global_app.$(field.name)
}
}
request_app.Context = global_app.Context // copy the context ref that contains static files map etc
mut conn := l.accept() or {
// failures should not panic
eprintln('accept() failed with error: $err.msg')
continue
}
go handle_conn<T>(mut conn, mut request_app, routes)
}
}
[manualfree]
fn handle_conn<T>(mut conn net.TcpConn, mut app T, routes map[string]Route) {
conn.set_read_timeout(30 * time.second)
conn.set_write_timeout(30 * time.second)
defer {
conn.close() or {}
unsafe {
free(app)
}
}
mut reader := io.new_buffered_reader(reader: conn)
defer {
reader.free()
}
page_gen_start := time.ticks()
// Request parse
req := http.parse_request(mut reader) or {
// Prevents errors from being thrown when BufferedReader is empty
if '$err' != 'none' {
eprintln('error parsing request: $err')
}
return
}
// URL Parse
url := urllib.parse(req.url) or {
eprintln('error parsing path: $err')
return
}
// Query parse
query := parse_query_from_url(url)
url_words := url.path.split('/').filter(it != '')
// Form parse
form, files := parse_form_from_request(req) or {
// Bad request
conn.write(vweb.http_400.bytes()) or {}
return
}
app.Context = Context{
req: req
page_gen_start: page_gen_start
conn: conn
query: query
form: form
files: files
static_files: app.static_files
static_mime_types: app.static_mime_types
}
// Calling middleware...
app.before_request()
// Static handling
if serve_if_static<T>(mut app, url) {
// successfully served a static file
return
}
// Route matching
$for method in T.methods {
$if method.return_type is Result {
route := routes[method.name] or {
eprintln('parsed attributes for the `$method.name` are not found, skipping...')
Route{}
}
// Skip if the HTTP request method does not match the attributes
if req.method in route.methods {
// Used for route matching
route_words := route.path.split('/').filter(it != '')
// Route immediate matches first
// For example URL `/register` matches route `/:user`, but `fn register()`
// should be called first.
if !route.path.contains('/:') && url_words == route_words {
// We found a match
if req.method == .post && method.args.len > 0 {
// Populate method args with form values
mut args := []string{cap: method.args.len}
for param in method.args {
args << form[param.name]
}
app.$method(args)
} else {
app.$method()
}
return
}
if url_words.len == 0 && route_words == ['index'] && method.name == 'index' {
app.$method()
return
}
if params := route_matches(url_words, route_words) {
method_args := params.clone()
if method_args.len != method.args.len {
eprintln('warning: uneven parameters count ($method.args.len) in `$method.name`, compared to the vweb route `$method.attrs` ($method_args.len)')
}
app.$method(method_args)
return
}
}
}
}
// Route not found
conn.write(vweb.http_404.bytes()) or {}
}
fn route_matches(url_words []string, route_words []string) ?[]string {
// URL path should be at least as long as the route path
// except for the catchall route (`/:path...`)
if route_words.len == 1 && route_words[0].starts_with(':') && route_words[0].ends_with('...') {
return ['/' + url_words.join('/')]
}
if url_words.len < route_words.len {
return none
}
mut params := []string{cap: url_words.len}
if url_words.len == route_words.len {
for i in 0 .. url_words.len {
if route_words[i].starts_with(':') {
// We found a path paramater
params << url_words[i]
} else if route_words[i] != url_words[i] {
// This url does not match the route
return none
}
}
return params
}
// The last route can end with ... indicating an array
if route_words.len == 0 || !route_words[route_words.len - 1].ends_with('...') {
return none
}
for i in 0 .. route_words.len - 1 {
if route_words[i].starts_with(':') {
// We found a path paramater
params << url_words[i]
} else if route_words[i] != url_words[i] {
// This url does not match the route
return none
}
}
params << url_words[route_words.len - 1..url_words.len].join('/')
return params
}
// check if request is for a static file and serves it
// returns true if we served a static file, false otherwise
[manualfree]
fn serve_if_static<T>(mut app T, url urllib.URL) bool {
// TODO: handle url parameters properly - for now, ignore them
static_file := app.static_files[url.path]
mime_type := app.static_mime_types[url.path]
if static_file == '' || mime_type == '' {
return false
}
data := os.read_file(static_file) or {
send_string(mut app.conn, vweb.http_404.bytestr()) or {}
return true
}
app.send_response_to_client(mime_type, data)
unsafe { data.free() }
return true
}
fn (mut ctx Context) scan_static_directory(directory_path string, mount_path string) {
files := os.ls(directory_path) or { panic(err) }
if files.len > 0 {
for file in files {
full_path := os.join_path(directory_path, file)
if os.is_dir(full_path) {
ctx.scan_static_directory(full_path, mount_path + '/' + file)
} else if file.contains('.') && !file.starts_with('.') && !file.ends_with('.') {
ext := os.file_ext(file)
// Rudimentary guard against adding files not in mime_types.
// Use serve_static directly to add non-standard mime types.
if ext in vweb.mime_types {
ctx.serve_static(mount_path + '/' + file, full_path)
}
}
}
}
}
// Handles a directory static
// If `root` is set the mount path for the dir will be in '/'
pub fn (mut ctx Context) handle_static(directory_path string, root bool) bool {
if ctx.done || !os.exists(directory_path) {
return false
}
dir_path := directory_path.trim_space().trim_right('/')
mut mount_path := ''
if dir_path != '.' && os.is_dir(dir_path) && !root {
// Mount point hygene, "./assets" => "/assets".
mount_path = '/' + dir_path.trim_left('.').trim('/')
}
ctx.scan_static_directory(dir_path, mount_path)
return true
}
// mount_static_folder_at - makes all static files in `directory_path` and inside it, available at http://server/mount_path
// For example: suppose you have called .mount_static_folder_at('/var/share/myassets', '/assets'),
// and you have a file /var/share/myassets/main.css .
// => That file will be available at URL: http://server/assets/main.css .
pub fn (mut ctx Context) mount_static_folder_at(directory_path string, mount_path string) bool {
if ctx.done || mount_path.len < 1 || mount_path[0] != `/` || !os.exists(directory_path) {
return false
}
dir_path := directory_path.trim_right('/')
ctx.scan_static_directory(dir_path, mount_path[1..])
return true
}
// Serves a file static
// `url` is the access path on the site, `file_path` is the real path to the file, `mime_type` is the file type
pub fn (mut ctx Context) serve_static(url string, file_path string) {
ctx.static_files[url] = file_path
// ctx.static_mime_types[url] = mime_type
ext := os.file_ext(file_path)
ctx.static_mime_types[url] = vweb.mime_types[ext]
}
// Returns the ip address from the current user
pub fn (ctx &Context) ip() string {
mut ip := ctx.req.header.get(.x_forwarded_for) or { '' }
if ip == '' {
ip = ctx.req.header.get_custom('X-Real-Ip') or { '' }
}
if ip.contains(',') {
ip = ip.all_before(',')
}
if ip == '' {
ip = ctx.conn.peer_ip() or { '' }
}
return ip
}
// Set s to the form error
pub fn (mut ctx Context) error(s string) {
println('vweb error: $s')
ctx.form_error = s
}
// Returns an empty result
pub fn not_found() Result {
return Result{}
}
fn send_string(mut conn net.TcpConn, s string) ? {
conn.write(s.bytes()) ?
}
// Do not delete.
// It used by `vlib/v/gen/c/str_intp.v:130` for string interpolation inside vweb templates
// TODO: move it to template render
fn filter(s string) string {
return s.replace_each([
'<',
'&lt;',
'"',
'&quot;',
'&',
'&amp;',
])
}

78
vieter/vweb/vweb_app_test.v 100644
View File

@ -0,0 +1,78 @@
module main
import vweb
import time
import sqlite
struct App {
vweb.Context
pub mut:
db sqlite.DB
user_id string
}
struct Article {
id int
title string
text string
}
fn test_a_vweb_application_compiles() {
go fn () {
time.sleep(2 * time.second)
exit(0)
}()
vweb.run(&App{}, 18081)
}
/*
/TODO
pub fn (mut app App) init_server_old() {
app.db = sqlite.connect('blog.db') or { panic(err) }
app.db.create_table('article', [
'id integer primary key',
"title text default ''",
"text text default ''",
])
}
*/
pub fn (mut app App) before_request() {
app.user_id = app.get_cookie('id') or { '0' }
}
['/new_article'; post]
pub fn (mut app App) new_article() vweb.Result {
title := app.form['title']
text := app.form['text']
if title == '' || text == '' {
return app.text('Empty text/title')
}
article := Article{
title: title
text: text
}
println('posting article')
println(article)
sql app.db {
insert article into Article
}
return app.redirect('/')
}
fn (mut app App) time() {
app.text(time.now().format())
}
fn (mut app App) time_json() {
app.json({
'time': time.now().format()
})
}
fn (mut app App) time_json_pretty() {
app.json_pretty({
'time': time.now().format()
})
}