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91 lines
2.5 KiB
Rust
91 lines
2.5 KiB
Rust
use base64::prelude::*;
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use percent_encoding::percent_decode_str;
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use url::Url;
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use crate::utils::{detect_media_type, parse_content_type};
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pub const EMPTY_IMAGE_DATA_URL: &'static str = "data:image/png;base64,\
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iVBORw0KGgoAAAANSUhEUgAAAA0AAAANCAQAAADY4iz3AAAAEUlEQVR42mNkwAkYR6UolgIACvgADsuK6xYAAAAASUVORK5CYII=";
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pub fn clean_url(url: Url) -> Url {
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let mut url = url.clone();
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// Clear fragment (if any)
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url.set_fragment(None);
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url
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}
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pub fn create_data_url(media_type: &str, charset: &str, data: &[u8], final_asset_url: &Url) -> Url {
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// TODO: move this block out of this function
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let media_type: String = if media_type.is_empty() {
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detect_media_type(data, &final_asset_url)
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} else {
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media_type.to_string()
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};
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let mut data_url: Url = Url::parse("data:,").unwrap();
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let c: String =
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if !charset.trim().is_empty() && !charset.trim().eq_ignore_ascii_case("US-ASCII") {
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format!(";charset={}", charset.trim())
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} else {
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"".to_string()
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};
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data_url.set_path(
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format!(
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"{}{};base64,{}",
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media_type,
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c,
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BASE64_STANDARD.encode(data)
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)
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.as_str(),
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);
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data_url
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}
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pub fn is_url_and_has_protocol(input: &str) -> bool {
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match Url::parse(&input) {
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Ok(parsed_url) => {
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return parsed_url.scheme().len() > 0;
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}
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Err(_) => {
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return false;
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}
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}
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}
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pub fn parse_data_url(url: &Url) -> (String, String, Vec<u8>) {
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let path: String = url.path().to_string();
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let comma_loc: usize = path.find(',').unwrap_or(path.len());
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// Split data URL into meta data and raw data
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let content_type: String = path.chars().take(comma_loc).collect();
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let data: String = path.chars().skip(comma_loc + 1).collect();
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// Parse meta data
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let (media_type, charset, is_base64) = parse_content_type(&content_type);
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// Parse raw data into vector of bytes
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let text: String = percent_decode_str(&data).decode_utf8_lossy().to_string();
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let blob: Vec<u8> = if is_base64 {
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BASE64_STANDARD.decode(&text).unwrap_or(vec![])
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} else {
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text.as_bytes().to_vec()
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};
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(media_type, charset, blob)
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}
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pub fn resolve_url(from: &Url, to: &str) -> Url {
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match Url::parse(&to) {
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Ok(parsed_url) => parsed_url,
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Err(_) => match from.join(to) {
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Ok(joined) => joined,
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Err(_) => Url::parse("data:,").unwrap(),
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},
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}
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}
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