GET Slice request

If optimizing speed is of concern when querying pages with large response bodies, and you know you only need a portion of them, you can perform a get_slice request.

// Sends a GET request to the specified `url` and returns a slice of the response content.
// Allocation of the received response as a vstring is postponed until the `start` byte position is reached.
// The content is returned as soon as the slice reaches its `max_size` (offset from `start`)
// - `max_size` can be `none` to return the remainder from the start.
pub fn (req Request) get_slice(url string, start usize, max_size ?usize) !Response

import vibe
import net.html

resp := vibe.get_slice('https://docs.vosca.dev/advanced-concepts/v-and-c.html', 665000,
    110000)!
selector := html.parse(resp.body).get_tags_by_class_name('language-vmod')[0]
println(selector.text())

get_slice_test

Download with progress

// Downloads a document from the specified `url` and saves it to the specified `file_path`.
// `download` must implement a `progress(pos usize, size usize)`, and a `finish()` method.
pub fn (req Request) download_file_with_progress(url string, file_path string, download Download) !Response

import vibe
import os

// User-defined struct that implements the `Download` interface.
struct MyStruct {
    foo string
    bar string
}

fn (dl MyStruct) progress(pos u64, size u64) {
    print('\rDownloading... ${f64(pos) / size * 100:.2f}%')
    os.flush()
}

fn (dl MyStruct) finish() {
    println('\nDownload completed.')
}

mut download := MyStruct{}
vibe.download_file_with_progress('https://github.com/vlang/v/releases/download/weekly.2023.23/v_linux.zip',
    'v_linux.zip', mut download)!

Persistent Cookie

Share cookies between requests / sessions with a curl cookie jar file.

The demo below does not provide real authentication data, for a "full" use-case scenario, change the payload data and requested URLs to actual addresses that require authentication.

import vibe
import os

cookie_jar := './demo_cookie'

req := vibe.Request{
    headers:    {
        .content_type: 'application/json; charset=utf-8'
    }
    cookie_jar: cookie_jar
}

// Login and save cookies to curl cookie file.
req.post('https://api.yourdomain.com/v1/login', '{"username":"yourname","password":"password"}')!

// Use the `cookie_file` in subsequent sessions to access endpoints that require the authentication above.
req2 := vibe.Request{
    headers:     {
        .content_type: 'application/json; charset=utf-8'
    }
    cookie_file: cookie_jar
}

resp := req2.get('https://api.yourdomain.com/v1/protected_page')!
// ... use resp

// Remove the cookie file or keep it for later usage.
os.rm(cookie_jar)!